Translate the webhttrack WARC strings into the remaining languages

PR #672 added a WARC toggle to the webhttrack GUI with 4 new LANG keys,
translated only in English and French. Append the same 4 msgid/translation
pairs to the other 28 lang/*.txt so those locales stop falling back to
English. Each translation is encoded in the file's declared LANGUAGE_CHARSET
(the charset the server serves the page and parses the form as) with a strict
lossless round-trip, matching each file's existing CRLF/LF line ending.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Xavier Roche <roche@httrack.com>

.github/workflows/windows-build.yml

@@ -202,7 +202,8 @@ jobs:
 
           # Every gate here exits 77, so an all-skipped suite would report green having
           # tested nothing: pin the skips, and floor the passes in case the glob empties.
-          expected_skips=" 48_local-crange-memresume.test 71_local-crange-repaircache.test"  # pending #581
+          # footer-overflow skips on Windows (needs a path past MAX_PATH); crange pending #581.
+          expected_skips=" 01_engine-footer-overflow.test 48_local-crange-memresume.test 71_local-crange-repaircache.test"
           [ "$pass" -ge 90 ] || { echo "::error::only $pass tests passed ($skip skipped)"; exit 1; }
           [ "$skipped" = "$expected_skips" ] || { echo "::error::unexpected skips:$skipped"; exit 1; }
           [ "$fail" -eq 0 ] || { echo "::error::failing:$failed"; exit 1; }

html/cmdguide.html

@@ -323,10 +323,18 @@ options control what HTTrack says about itself.</p>
   <tr><td><tt>--user-agent (-F)</tt></td><td>The <tt>User-Agent</tt>. Set a browser string to get past crawler blocks; <tt>--user-agent ""</tt> sends none.</td></tr>
   <tr><td><tt>--referer (-%R), --from (-%E), --language (-%l), --accept (-%a)</tt></td><td>Referer, From, Accept-Language and Accept headers.</td></tr>
   <tr><td><tt>--headers (-%X)</tt></td><td>Add raw header lines to every request.</td></tr>
-  <tr><td><tt>--footer (-%F)</tt></td><td>A footer written into saved pages (on disk, not a network header).</td></tr>
+  <tr><td><tt>--footer (-%F)</tt></td><td>A footer written into saved pages (on disk, not a network header). See <b>Footer fields</b> below.</td></tr>
   <tr><td><tt>--cookies (-b), --cookies-file (-%K)</tt></td><td>Accept cookies, and preload a Netscape <tt>cookies.txt</tt>.</td></tr>
 </table>
 
+<p><b>Footer fields.</b> A footer with no <tt>%s</tt> may reference named fields:
+<tt>{addr}</tt>, <tt>{path}</tt>, <tt>{url}</tt>, <tt>{date}</tt> (mirror time),
+<tt>{lastmodified}</tt> (the page's Last-Modified), <tt>{version}</tt>,
+<tt>{mime}</tt>, <tt>{charset}</tt>, <tt>{status}</tt> and <tt>{size}</tt>; write
+<tt>{{</tt> or <tt>}}</tt> for a literal brace. A footer that contains <tt>%s</tt>
+keeps the older positional form (host, path, date in that order). Example:
+<tt>-%F "&lt;!-- Mirrored from {url} on {date} --&gt;"</tt>.</p>
+
 <p><b>Login.</b> For HTTP Basic auth, put the credentials in the URL:
 <tt>http://user:pass@host/</tt>. An <tt>@</tt> inside the username must be written
 <tt>%40</tt>. Only Basic is supported, not Digest.</p>

html/httrack.man.html

@@ -90,38 +90,41 @@ offline browser : copy websites to a local directory</p>
 ] [ <b>-NN, --structure[=N]</b> ] [ <b>-%N,
 --delayed-type-check</b> ] [ <b>-%D,
 --cached-delayed-type-check</b> ] [ <b>-%M, --mime-html</b>
-] [ <b>-LN, --long-names[=N]</b> ] [ <b>-KN,
---keep-links[=N]</b> ] [ <b>-x, --replace-external</b> ] [
-<b>-%x, --disable-passwords</b> ] [ <b>-%q,
---include-query-string</b> ] [ <b>-%g, --strip-query</b> ] [
-<b>-o, --generate-errors</b> ] [ <b>-X, --purge-old[=N]</b>
-] [ <b>-%p, --preserve</b> ] [ <b>-%T, --utf8-conversion</b>
-] [ <b>-bN, --cookies[=N]</b> ] [ <b>-%K, --cookies-file</b>
-] [ <b>-%Y, --why</b> ] [ <b>-u, --check-type[=N]</b> ] [
-<b>-j, --parse-java[=N]</b> ] [ <b>-sN, --robots[=N]</b> ] [
-<b>-%h, --http-10</b> ] [ <b>-%k, --keep-alive</b> ] [
-<b>-%B, --tolerant</b> ] [ <b>-%s, --updatehack</b> ] [
-<b>-%u, --urlhack</b> ] [ <b>-%A, --assume</b> ] [ <b>-@iN,
---protocol[=N]</b> ] [ <b>-%w, --disable-module</b> ] [
-<b>-F, --user-agent</b> ] [ <b>-%R, --referer</b> ] [
-<b>-%E, --from</b> ] [ <b>-%F, --footer</b> ] [ <b>-%l,
---language</b> ] [ <b>-%a, --accept</b> ] [ <b>-%X,
---headers</b> ] [ <b>-C, --cache[=N]</b> ] [ <b>-k,
---store-all-in-cache</b> ] [ <b>-%n, --do-not-recatch</b> ]
-[ <b>-%v, --display</b> ] [ <b>-Q, --do-not-log</b> ] [
-<b>-q, --quiet</b> ] [ <b>-z, --extra-log</b> ] [ <b>-Z,
---debug-log</b> ] [ <b>-v, --verbose</b> ] [ <b>-f,
---file-log</b> ] [ <b>-f2, --single-log</b> ] [ <b>-I,
---index</b> ] [ <b>-%i, --build-top-index</b> ] [ <b>-%I,
---search-index</b> ] [ <b>-pN, --priority[=N]</b> ] [ <b>-S,
---stay-on-same-dir</b> ] [ <b>-D, --can-go-down</b> ] [
-<b>-U, --can-go-up</b> ] [ <b>-B, --can-go-up-and-down</b> ]
-[ <b>-a, --stay-on-same-address</b> ] [ <b>-d,
+] [ <b>-%r, --warc</b> ] [ <b>-LN, --long-names[=N]</b> ] [
+<b>-KN, --keep-links[=N]</b> ] [ <b>-x,
+--replace-external</b> ] [ <b>-%x, --disable-passwords</b> ]
+[ <b>-%q, --include-query-string</b> ] [ <b>-%g,
+--strip-query</b> ] [ <b>-o, --generate-errors</b> ] [
+<b>-X, --purge-old[=N]</b> ] [ <b>-%p, --preserve</b> ] [
+<b>-%T, --utf8-conversion</b> ] [ <b>-bN, --cookies[=N]</b>
+] [ <b>-%K, --cookies-file</b> ] [ <b>-%Y, --why</b> ] [
+<b>-u, --check-type[=N]</b> ] [ <b>-j, --parse-java[=N]</b>
+] [ <b>-sN, --robots[=N]</b> ] [ <b>-%h, --http-10</b> ] [
+<b>-%k, --keep-alive</b> ] [ <b>-%z,
+--disable-compression</b> ] [ <b>-%B, --tolerant</b> ] [
+<b>-%s, --updatehack</b> ] [ <b>-%u, --urlhack</b> ] [
+<b>-%A, --assume</b> ] [ <b>-@iN, --protocol[=N]</b> ] [
+<b>-%w, --disable-module</b> ] [ <b>-F, --user-agent</b> ] [
+<b>-%R, --referer</b> ] [ <b>-%E, --from</b> ] [ <b>-%F,
+--footer</b> ] [ <b>-%l, --language</b> ] [ <b>-%a,
+--accept</b> ] [ <b>-%X, --headers</b> ] [ <b>-C,
+--cache[=N]</b> ] [ <b>-k, --store-all-in-cache</b> ] [
+<b>-%n, --do-not-recatch</b> ] [ <b>-%v, --display</b> ] [
+<b>-Q, --do-not-log</b> ] [ <b>-q, --quiet</b> ] [ <b>-z,
+--extra-log</b> ] [ <b>-Z, --debug-log</b> ] [ <b>-v,
+--verbose</b> ] [ <b>-f, --file-log</b> ] [ <b>-f2,
+--single-log</b> ] [ <b>-I, --index</b> ] [ <b>-%i,
+--build-top-index</b> ] [ <b>-%I, --search-index</b> ] [
+<b>-pN, --priority[=N]</b> ] [ <b>-S, --stay-on-same-dir</b>
+] [ <b>-D, --can-go-down</b> ] [ <b>-U, --can-go-up</b> ] [
+<b>-B, --can-go-up-and-down</b> ] [ <b>-a,
+--stay-on-same-address</b> ] [ <b>-d,
 --stay-on-same-domain</b> ] [ <b>-l, --stay-on-same-tld</b>
 ] [ <b>-e, --go-everywhere</b> ] [ <b>-%H,
 --debug-headers</b> ] [ <b>-%!,
 --disable-security-limits</b> ] [ <b>-V, --userdef-cmd</b> ]
-[ <b>-%W, --callback</b> ] [ <b>-K, --keep-links[=N]</b>
+[ <b>-%W, --callback</b> ] [ <b>-y,
+--background-on-suspend</b> ] [ <b>-K, --keep-links[=N]</b>
 ]</p>
 
 <h2>DESCRIPTION
@@ -646,6 +649,30 @@ don&rsquo;t wait) (--cached-delayed-type-check)</p></td></tr>
 <td width="4%">
 
 
+<p>-%r</p></td>
+<td width="5%"></td>
+<td width="82%">
+
+
+<p>write an ISO-28500 WARC/1.1 archive; --warc-file NAME
+sets the output name (--warc)</p></td></tr>
+<tr valign="top" align="left">
+<td width="9%"></td>
+<td width="4%">
+
+
+<p>-%t</p></td>
+<td width="5%"></td>
+<td width="82%">
+
+
+<p>keep the original file extension, don&rsquo;t rewrite it
+from the MIME type (%t0 rewrite)</p></td></tr>
+<tr valign="top" align="left">
+<td width="9%"></td>
+<td width="4%">
+
+
 <p>-LN</p></td>
 <td width="5%"></td>
 <td width="82%">
@@ -878,6 +905,18 @@ for small files and test requests (%k0 don&rsquo;t use)
 <td width="4%">
 
 
+<p>-%z</p></td>
+<td width="5%"></td>
+<td width="82%">
+
+
+<p>do not request compressed content (%z0 request)
+(--disable-compression)</p> </td></tr>
+<tr valign="top" align="left">
+<td width="9%"></td>
+<td width="4%">
+
+
 <p>-%B</p></td>
 <td width="5%"></td>
 <td width="82%">
@@ -1023,9 +1062,10 @@ headers (-F &quot;user-agent name&quot;) (--user-agent
 <td width="82%">
 
 
-<p>footer string in Html code (-%F &quot;Mirrored [from
-host %s [file %s [at %s]]]&quot; (--footer
-&lt;param&gt;)</p> </td></tr>
+<p>footer string in Html code (-%F &quot;Mirrored from
+{url} on {date}&quot;; fields {addr} {path} {url} {date}
+{lastmodified} {version} {mime} {charset} {status} {size},
+or legacy %s) (--footer &lt;param&gt;)</p></td></tr>
 <tr valign="top" align="left">
 <td width="9%"></td>
 <td width="4%">
@@ -1383,25 +1423,13 @@ p7 get html files before, then treat other files</p>
 <td width="8%">
 
 
-<p style="margin-top: 1em">-#X</p></td>
+<p style="margin-top: 1em">-#test</p></td>
 <td width="1%"></td>
 <td width="82%">
 
 
-<p style="margin-top: 1em">*use optimized engine (limited
-memory boundary checks) (--fast-engine)</p></td></tr>
-<tr valign="top" align="left">
-<td width="9%"></td>
-<td width="8%">
-
-
-<p>-#test</p></td>
-<td width="1%"></td>
-<td width="82%">
-
-
-<p>list engine self-tests (run one with -#test=NAME
-[args])</p> </td></tr>
+<p style="margin-top: 1em">list engine self-tests (run one
+with -#test=NAME [args])</p></td></tr>
 <tr valign="top" align="left">
 <td width="9%"></td>
 <td width="8%">
@@ -1532,17 +1560,6 @@ memory boundary checks) (--fast-engine)</p></td></tr>
 <td width="8%">
 
 
-<p>-#R</p></td>
-<td width="1%"></td>
-<td width="82%">
-
-
-<p>old FTP routines (debug) (--repair-cache)</p></td></tr>
-<tr valign="top" align="left">
-<td width="9%"></td>
-<td width="8%">
-
-
 <p>-#T</p></td>
 <td width="1%"></td>
 <td width="82%">
@@ -1633,6 +1650,18 @@ each files ($0 is the filename: -V &quot;rm \$0&quot;)
 
 <p>use an external library function as a wrapper (-%W
 myfoo.so[,myparameters]) (--callback &lt;param&gt;)</p></td></tr>
+<tr valign="top" align="left">
+<td width="9%"></td>
+<td width="4%">
+
+
+<p>-y</p></td>
+<td width="5%"></td>
+<td width="82%">
+
+
+<p>go to background when suspended (y0 don&rsquo;t)
+(--background-on-suspend)</p> </td></tr>
 </table>
 
 <h3>Details: Option N

html/server/option9.html

@@ -103,6 +103,17 @@ ${do:end-if}
 > ${LANG_I61}
 <br><br>
 
+<input type="checkbox" name="warc" ${checked:warc}
+			title='${html:LANG_WARCTIP}' onMouseOver="info('${html:LANG_WARCTIP}'); return true" onMouseOut="info('&nbsp;'); return true"
+> ${LANG_WARC}
+<br><br>
+
+${LANG_WARCFILE}
+<input name="warcfile" value="${warcfile}" size="40"
+			title='${html:LANG_WARCFILETIP}' onMouseOver="info('${html:LANG_WARCFILETIP}'); return true" onMouseOut="info('&nbsp;'); return true"
+>
+<br><br>
+
 <input type="checkbox" name="norecatch" ${checked:norecatch}
 			title='${html:LANG_I5b}' onMouseOver="info('${html:LANG_I5b}'); return true" onMouseOut="info('&nbsp;'); return true"
 > ${LANG_I34b}

html/server/step2.html

@@ -141,6 +141,8 @@ ${do:copy:KeepSlashes:keepslashes}
 ${do:copy:KeepQueryOrder:keepqueryorder}
 ${do:copy:StripQuery:stripquery}
 ${do:copy:StoreAllInCache:cache2}
+${do:copy:Warc:warc}
+${do:copy:WarcFile:warcfile}
 ${do:copy:LogType:logtype}
 ${do:copy:UseHTTPProxyForFTP:ftpprox}
 ${do:copy:ProxyType:proxytype}

html/server/step4.html

@@ -187,6 +187,8 @@ ${do:end-if}
 	${test:toler:--tolerant}
 	${test:http10:--http-10}
 	${test:cache2:--store-all-in-cache}
+	${test:warc:--warc}
+	${test:warcfile:--warc-file "}${html:warcfile}${test:warcfile:"}
 	${test:norecatch:--do-not-recatch}
 	${test:logf:--single-log}
 	${test:logtype:::--extra-log:--debug-log}
@@ -237,6 +239,8 @@ KeepSlashes=${ztest:keepslashes:0:1}
 KeepQueryOrder=${ztest:keepqueryorder:0:1}
 StripQuery=${stripquery}
 StoreAllInCache=${ztest:cache2:0:1}
+Warc=${ztest:warc:0:1}
+WarcFile=${warcfile}
 LogType=${logtype}
 UseHTTPProxyForFTP=${ztest:ftpprox:0:1}
 ProxyType=${proxytype}

lang.def

@@ -1034,3 +1034,11 @@ LANG_STRIPQUERY
 Strip query keys:
 LANG_STRIPQUERYTIP
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
+LANG_WARC
+Write a WARC archive of the crawl
+LANG_WARCTIP
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+LANG_WARCFILE
+WARC archive name:
+LANG_WARCFILETIP
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.

lang/Bulgarian.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Ïðåìàõâàíå íà êëþ÷îâå îò çàÿâêàòà:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Êëþ÷îâå îò çàÿâêàòà, ðàçäåëåíè ñúñ çàïåòàÿ, êîèòî äà ñå ïðåìàõíàò îò èìåòî íà çàïèñàíèÿ ôàéë (íàïðèìåð sid,utm_source).
+Write a WARC archive of the crawl
+Çàïèñâàíå íà WARC àðõèâ íà îáõîæäàíåòî
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Çàïèñâàíå íà âñåêè èçòåãëåí îòãîâîð è â WARC/1.1 àðõèâ ïî ISO-28500, äî îãëåäàëîòî.
+WARC archive name:
+Èìå íà WARC àðõèâà:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Íåçàäúëæèòåëíî áàçîâî èìå çà WARC àðõèâà; îñòàâåòå ïðàçíî çà àâòîìàòè÷íî èìåíóâàíå â èçõîäíàòà äèðåêòîðèÿ.

lang/Castellano.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Eliminar claves de query string:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Claves de query string, separadas por comas, que se eliminarán del nombre de los archivos guardados (p. ej. sid,utm_source).
+Write a WARC archive of the crawl
+Escribir un archivo WARC del rastreo
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Guardar también cada respuesta descargada en un archivo WARC/1.1 ISO-28500, junto a la réplica.
+WARC archive name:
+Nombre del archivo WARC:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Nombre base opcional para el archivo WARC; déjelo en blanco para nombrarlo automáticamente en el directorio de salida.

lang/Cesky.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Odebrat klíèe dotazu:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Klíèe dotazu oddìlené èárkami, které se vynechají z pojmenování ukládaných souborù (napø. sid,utm_source).
+Write a WARC archive of the crawl
+Zapsat archiv WARC z procházení
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Uložit také každou staženou odpovìï do archivu WARC/1.1 podle ISO-28500 vedle zrcadla.
+WARC archive name:
+Název archivu WARC:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Volitelný základní název archivu WARC; ponechte prázdné pro automatické pojmenování ve výstupním adresáøi.

lang/Chinese-BIG5.txt

@@ -956,3 +956,11 @@ Strip query keys:
 移除查詢鍵:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 以逗號分隔的查詢鍵，將其從儲存檔案的命名中移除 (例如 sid,utm_source)。
+Write a WARC archive of the crawl
+寫入此次抓取的 WARC 封存檔
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+同時將每個已擷取的回應儲存為 ISO-28500 WARC/1.1 封存檔，置於鏡像網站旁。
+WARC archive name:
+WARC 封存檔名稱：
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+WARC 封存檔的選用基本名稱；留空則於輸出目錄中自動命名。

lang/Chinese-Simplified.txt

@@ -956,3 +956,11 @@ Strip query keys:
 剥离查询键:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 用逗号分隔的查询键，将其从保存文件的命名中删除 (例如 sid,utm_source)。
+Write a WARC archive of the crawl
+写入本次抓取的 WARC 归档
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+同时将每个已获取的响应保存为 ISO-28500 WARC/1.1 归档，置于镜像站点旁边。
+WARC archive name:
+WARC 归档名称：
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+WARC 归档的可选基本名称；留空则在输出目录中自动命名。

lang/Croatian.txt

@@ -958,3 +958,11 @@ Strip query keys:
 Ukloniti kljuèeve upita:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Zarezom odvojeni kljuèevi upita koji se izostavljaju iz naziva spremljenih datoteka (npr. sid,utm_source).
+Write a WARC archive of the crawl
+Zapi¹i WARC arhivu obilaska
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Spremi i svaki preuzeti odgovor u ISO-28500 WARC/1.1 arhivu, uz zrcalo.
+WARC archive name:
+Naziv WARC arhive:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Neobavezni osnovni naziv WARC arhive; ostavite prazno za automatsko imenovanje u izlaznom direktoriju.

lang/Dansk.txt

@@ -1004,3 +1004,11 @@ Strip query keys:
 Fjern forespørgselsnøgler:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Kommaseparerede forespørgselsnøgler, der udelades i navngivningen af gemte filer (f.eks. sid,utm_source).
+Write a WARC archive of the crawl
+Skriv et WARC-arkiv af gennemsøgningen
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Gem også hvert hentet svar i et ISO-28500 WARC/1.1-arkiv ved siden af spejlet.
+WARC archive name:
+Navn på WARC-arkiv:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Valgfrit basisnavn til WARC-arkivet; lad feltet stå tomt for automatisk navngivning i outputmappen.

lang/Deutsch.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Query-Schlüssel entfernen:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Kommagetrennte Query-Schlüssel, die bei der Benennung gespeicherter Dateien entfallen (z. B. sid,utm_source).
+Write a WARC archive of the crawl
+WARC-Archiv des Crawls schreiben
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Jede heruntergeladene Antwort zusätzlich in einem ISO-28500-WARC/1.1-Archiv neben dem Spiegel speichern.
+WARC archive name:
+Name des WARC-Archivs:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Optionaler Basisname für das WARC-Archiv; leer lassen, um es automatisch im Ausgabeverzeichnis zu benennen.

lang/Eesti.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Eemalda päringuvõtmed:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Komadega eraldatud päringuvõtmed, mis jäetakse salvestatud faili nimest välja (nt sid,utm_source).
+Write a WARC archive of the crawl
+Kirjuta läbimise WARC-arhiiv
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Salvesta iga alla laaditud vastus ka ISO-28500 WARC/1.1 arhiivi peegli kõrvale.
+WARC archive name:
+WARC-arhiivi nimi:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+WARC-arhiivi valikuline põhinimi; jäta tühjaks, et see väljundkataloogis automaatselt nimetada.

lang/English.txt

@@ -1004,3 +1004,11 @@ Strip query keys:
 Strip query keys:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
+Write a WARC archive of the crawl
+Write a WARC archive of the crawl
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+WARC archive name:
+WARC archive name:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.

lang/Finnish.txt

@@ -958,3 +958,11 @@ Strip query keys:
 Poista kyselyavaimet:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Pilkuin erotellut kyselyavaimet, jotka jätetään pois tallennettujen tiedostojen nimeämisestä (esim. sid,utm_source).
+Write a WARC archive of the crawl
+Kirjoita imuroinnin WARC-arkisto
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Tallenna myös jokainen noudettu vastaus ISO-28500 WARC/1.1 -arkistoon peilin viereen.
+WARC archive name:
+WARC-arkiston nimi:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Valinnainen WARC-arkiston perusnimi; jätä tyhjäksi, jotta se nimetään automaattisesti tulostehakemistoon.

lang/Francais.txt

@@ -1004,3 +1004,11 @@ Strip query keys:
 Supprimer les clés de query string :
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Clés de query string à retirer du nommage des fichiers enregistrés, séparées par des virgules (par ex. sid,utm_source).
+Write a WARC archive of the crawl
+Écrire une archive WARC du crawl
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Enregistrer aussi chaque réponse téléchargée dans une archive WARC/1.1 (ISO-28500), à côté du miroir.
+WARC archive name:
+Nom de l'archive WARC :
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Nom de base optionnel pour l'archive WARC ; laissez vide pour le générer automatiquement dans le répertoire de sortie.

lang/Greek.txt

@@ -958,3 +958,11 @@ Strip query keys:
 Αφαίρεση κλειδιών ερωτήματος:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Κλειδιά ερωτήματος χωρισμένα με κόμμα, που θα αφαιρεθούν από την ονομασία των αποθηκευμένων αρχείων (π.χ. sid,utm_source).
+Write a WARC archive of the crawl
+Εγγραφή αρχείου WARC της ανίχνευσης
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Αποθήκευση κάθε ληφθείσας απόκρισης και σε αρχείο WARC/1.1 ISO-28500, δίπλα στο είδωλο.
+WARC archive name:
+Όνομα αρχείου WARC:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Προαιρετικό βασικό όνομα για το αρχείο WARC. Αφήστε το κενό για αυτόματη ονομασία στον κατάλογο εξόδου.

lang/Italiano.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Rimuovi chiavi della query string:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Chiavi della query string, separate da virgole, da rimuovere dai nomi dei file salvati (ad es. sid,utm_source).
+Write a WARC archive of the crawl
+Scrivi un archivio WARC della scansione
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Salva anche ogni risposta scaricata in un archivio WARC/1.1 ISO-28500, accanto al mirror.
+WARC archive name:
+Nome dell'archivio WARC:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Nome di base facoltativo per l'archivio WARC; lascia vuoto per assegnarlo automaticamente nella directory di output.

lang/Japanese.txt

@@ -956,3 +956,11 @@ Strip query keys:
 削除するクエリキー:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 保存ファイル名の生成から除外するクエリキーをカンマ区切りで指定します (例: sid,utm_source)。
+Write a WARC archive of the crawl
+クロールの WARC アーカイブを書き出す
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+取得した各レスポンスを ISO-28500 WARC/1.1 アーカイブとしてミラーの隣にも保存します。
+WARC archive name:
+WARC アーカイブ名:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+WARC アーカイブの任意のベース名。空欄にすると出力ディレクトリ内で自動的に名前が付けられます。

lang/Macedonian.txt

@@ -956,3 +956,11 @@ Strip query keys:
 ¾âáâàÐÝØ ÚÛãçÕÒØ ÞÔ ÑÐàÐúÕâÞ:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 ºÛãçÕÒØ ÞÔ ÑÐàÐúÕâÞ, ÞÔÔÕÛÕÝØ áÞ ×ÐßØàÚÐ, èâÞ áÕ ÞâáâàÐÝãÒÐÐâ ÞÔ ØÜÕâÞ ÝÐ ×ÐçãÒÐÝÐâÐ ÔÐâÞâÕÚÐ (ÝÐ ßàØÜÕà sid,utm_source).
+Write a WARC archive of the crawl
+·ÐßØèØ WARC ÐàåØÒÐ ÝÐ ßàÕÑÐàãÒÐúÕâÞ
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+·ÐçãÒÐø ÓÞ áÕÚÞø ßàÕ×ÕÜÕÝ ÞÔÓÞÒÞà Ø ÒÞ ISO-28500 WARC/1.1 ÐàåØÒÐ, ßÞÚàÐø ÞÓÛÕÔÐÛÞâÞ.
+WARC archive name:
+¸ÜÕ ÝÐ WARC ÐàåØÒÐâÐ:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+¸×ÑÞàÝÞ ÞáÝÞÒÝÞ ØÜÕ ×Ð WARC ÐàåØÒÐâÐ; ÞáâÐÒÕâÕ ßàÐ×ÝÞ ×Ð ÐÒâÞÜÐâáÚÞ ØÜÕÝãÒÐúÕ ÒÞ Ø×ÛÕ×ÝØÞâ ÔØàÕÚâÞàØãÜ.

lang/Magyar.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Lekérdezési kulcsok eltávolítása:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Vesszõvel elválasztott lekérdezési kulcsok, amelyeket el kell hagyni a mentett fájl elnevezésébõl (pl. sid,utm_source).
+Write a WARC archive of the crawl
+A bejárás WARC archívumának írása
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Minden letöltött válasz mentése ISO-28500 WARC/1.1 archívumba is, a tükör mellé.
+WARC archive name:
+WARC archívum neve:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+A WARC archívum opcionális alapneve; hagyja üresen az automatikus elnevezéshez a kimeneti könyvtárban.

lang/Nederlands.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Query-sleutels verwijderen:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Door komma's gescheiden query-sleutels die bij het benoemen van opgeslagen bestanden worden weggelaten (bijv. sid,utm_source).
+Write a WARC archive of the crawl
+Schrijf een WARC-archief van de crawl
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Sla ook elke opgehaalde respons op in een ISO-28500 WARC/1.1-archief, naast de mirror.
+WARC archive name:
+Naam van WARC-archief:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Optionele basisnaam voor het WARC-archief; laat leeg om het automatisch een naam te geven in de uitvoermap.

lang/Norsk.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Fjern spørrenøkler:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Kommaseparerte spørrenøkler som utelates i navngivingen av lagrede filer (f.eks. sid,utm_source).
+Write a WARC archive of the crawl
+Skriv et WARC-arkiv av gjennomgangen
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Lagre også hvert nedlastet svar i et ISO-28500 WARC/1.1-arkiv ved siden av speilet.
+WARC archive name:
+Navn på WARC-arkiv:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Valgfritt basisnavn for WARC-arkivet; la feltet stå tomt for automatisk navngivning i utdatamappen.

lang/Polski.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Usuñ klucze zapytania:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Rozdzielone przecinkami klucze zapytania pomijane przy nazywaniu zapisanych plików (np. sid,utm_source).
+Write a WARC archive of the crawl
+Zapisz archiwum WARC z indeksowania
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Zapisz te¿ ka¿d± pobran± odpowied¼ do archiwum WARC/1.1 ISO-28500, obok kopii lustrzanej.
+WARC archive name:
+Nazwa archiwum WARC:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Opcjonalna nazwa bazowa archiwum WARC; pozostaw puste, aby nazwaæ je automatycznie w katalogu wyj¶ciowym.

lang/Portugues-Brasil.txt

@@ -1004,3 +1004,11 @@ Strip query keys:
 Remover chaves da query string:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Chaves da query string, separadas por vírgulas, a serem removidas da nomeação dos arquivos salvos (ex.: sid,utm_source).
+Write a WARC archive of the crawl
+Gravar um arquivo WARC do rastreamento
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Salvar também cada resposta baixada em um arquivo WARC/1.1 ISO-28500, ao lado do espelho.
+WARC archive name:
+Nome do arquivo WARC:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Nome base opcional para o arquivo WARC; deixe em branco para nomeá-lo automaticamente no diretório de saída.

lang/Portugues.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Remover chaves da query string:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Chaves da query string, separadas por vírgulas, a remover da nomeação dos ficheiros guardados (por ex. sid,utm_source).
+Write a WARC archive of the crawl
+Escrever um arquivo WARC do rastreio
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Guardar também cada resposta transferida num arquivo WARC/1.1 ISO-28500, ao lado do espelho.
+WARC archive name:
+Nome do arquivo WARC:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Nome base opcional para o arquivo WARC; deixe em branco para o nomear automaticamente no diretório de saída.

lang/Romanian.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Elimina cheile din query string:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Chei din query string, separate prin virgula, de eliminat din denumirea fisierelor salvate (de ex. sid,utm_source).
+Write a WARC archive of the crawl
+Scrie o arhiva WARC a parcurgerii
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Salveaza si fiecare raspuns descarcat intr-o arhiva WARC/1.1 ISO-28500, langa oglinda.
+WARC archive name:
+Numele arhivei WARC:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Nume de baza optional pentru arhiva WARC; lasati gol pentru a-l denumi automat in directorul de iesire.

lang/Russian.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Óäàëÿòü êëþ÷è çàïðîñà:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Êëþ÷è çàïðîñà ÷åðåç çàïÿòóþ, óäàëÿåìûå èç èìåíè ñîõðàíÿåìîãî ôàéëà (íàïðèìåð, sid,utm_source).
+Write a WARC archive of the crawl
+Çàïèñàòü WARC-àðõèâ îáõîäà
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Ñîõðàíÿòü êàæäûé çàãðóæåííûé îòâåò òàêæå â àðõèâ WARC/1.1 ISO-28500 ðÿäîì ñ çåðêàëîì.
+WARC archive name:
+Èìÿ WARC-àðõèâà:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Íåîáÿçàòåëüíîå áàçîâîå èìÿ WARC-àðõèâà; îñòàâüòå ïóñòûì äëÿ àâòîìàòè÷åñêîãî èìåíîâàíèÿ â âûõîäíîì êàòàëîãå.

lang/Slovak.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Odstráni» kµúèe dotazu:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Kµúèe dotazu oddelené èiarkami, ktoré sa vynechajú z pomenovania ukladaných súborov (napr. sid,utm_source).
+Write a WARC archive of the crawl
+Zapísa» archív WARC z prehµadávania
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Ulo¾i» aj ka¾dú stiahnutú odpoveï do archívu WARC/1.1 ISO-28500 vedµa zrkadla.
+WARC archive name:
+Názov archívu WARC:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Voliteµný základný názov archívu WARC; ponechajte prázdne pre automatické pomenovanie vo výstupnom adresári.

lang/Slovenian.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Odstrani kljuce poizvedbe:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Z vejicami loceni kljuci poizvedbe, ki se izpustijo pri poimenovanju shranjenih datotek (npr. sid,utm_source).
+Write a WARC archive of the crawl
+Zapisi arhiv WARC iz pregledovanja
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Shrani tudi vsak preneseni odgovor v arhiv WARC/1.1 ISO-28500 poleg zrcala.
+WARC archive name:
+Ime arhiva WARC:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Neobvezno osnovno ime arhiva WARC; pustite prazno za samodejno poimenovanje v izhodni mapi.

lang/Svenska.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Ta bort frågenycklar:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Kommaseparerade frågenycklar som utelämnas vid namngivningen av sparade filer (t.ex. sid,utm_source).
+Write a WARC archive of the crawl
+Skriv ett WARC-arkiv av genomsökningen
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Spara även varje hämtat svar i ett ISO-28500 WARC/1.1-arkiv, bredvid spegeln.
+WARC archive name:
+WARC-arkivets namn:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Valfritt basnamn för WARC-arkivet; lämna tomt för att namnge det automatiskt i utdatakatalogen.

lang/Turkish.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Sorgu anahtarlarýný çýkar:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Kaydedilen dosya adlandýrmasýndan çýkarýlacak, virgülle ayrýlmýþ sorgu anahtarlarý (örn. sid,utm_source).
+Write a WARC archive of the crawl
+Taramanýn WARC arþivini yaz
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Ýndirilen her yanýtý ayrýca aynanýn yanýna bir ISO-28500 WARC/1.1 arþivine kaydet.
+WARC archive name:
+WARC arþivi adý:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+WARC arþivi için isteðe baðlý temel ad; çýktý dizininde otomatik adlandýrma için boþ býrakýn.

lang/Ukrainian.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Âèëó÷àòè êëþ÷³ çàïèòó:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Êëþ÷³ çàïèòó ÷åðåç êîìó, ÿê³ âèëó÷àþòüñÿ ç ³ìåí³ çáåðåæåíîãî ôàéëó (íàïðèêëàä, sid,utm_source).
+Write a WARC archive of the crawl
+Çàïèñàòè WARC-àðõ³â îáõîäó
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Çáåð³ãàòè êîæíó çàâàíòàæåíó â³äïîâ³äü òàêîæ ó àðõ³â WARC/1.1 ISO-28500 ïîðÿä ³ç äçåðêàëîì.
+WARC archive name:
+²ì'ÿ WARC-àðõ³âó:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+Íåîáîâ'ÿçêîâà áàçîâà íàçâà WARC-àðõ³âó; çàëèøòå ïîðîæí³ì äëÿ àâòîìàòè÷íîãî íàéìåíóâàííÿ ó âèõ³äíîìó êàòàëîç³.

lang/Uzbek.txt

@@ -956,3 +956,11 @@ Strip query keys:
 Olib tashlanadigan so’rov kalitlari:
 Comma-separated query keys to drop from the saved-file naming (e.g. sid,utm_source).
 Saqlangan fayl nomidan olib tashlanadigan, vergul bilan ajratilgan so’rov kalitlari (masalan, sid,utm_source).
+Write a WARC archive of the crawl
+Qidiruvning WARC arxivini yozish
+Also save every fetched response into an ISO-28500 WARC/1.1 archive, next to the mirror.
+Har bir yuklab olingan javobni ISO-28500 WARC/1.1 arxiviga ham, ko'zgu yonida saqlash.
+WARC archive name:
+WARC arxivi nomi:
+Optional base name for the WARC archive; leave blank to auto-name it under the output directory.
+WARC arxivi uchun ixtiyoriy asosiy nom; chiqish katalogida avtomatik nomlash uchun bo'sh qoldiring.

man/httrack.1

@@ -40,6 +40,7 @@ httrack \- offline browser : copy websites to a local directory
 [ \fB\-%N, \-\-delayed\-type\-check\fR ]
 [ \fB\-%D, \-\-cached\-delayed\-type\-check\fR ]
 [ \fB\-%M, \-\-mime\-html\fR ]
+[ \fB\-%r, \-\-warc\fR ]
 [ \fB\-LN, \-\-long\-names[=N]\fR ]
 [ \fB\-KN, \-\-keep\-links[=N]\fR ]
 [ \fB\-x, \-\-replace\-external\fR ]
@@ -58,6 +59,7 @@ httrack \- offline browser : copy websites to a local directory
 [ \fB\-sN, \-\-robots[=N]\fR ]
 [ \fB\-%h, \-\-http\-10\fR ]
 [ \fB\-%k, \-\-keep\-alive\fR ]
+[ \fB\-%z, \-\-disable\-compression\fR ]
 [ \fB\-%B, \-\-tolerant\fR ]
 [ \fB\-%s, \-\-updatehack\fR ]
 [ \fB\-%u, \-\-urlhack\fR ]
@@ -98,6 +100,7 @@ httrack \- offline browser : copy websites to a local directory
 [ \fB\-%!, \-\-disable\-security\-limits\fR ]
 [ \fB\-V, \-\-userdef\-cmd\fR ]
 [ \fB\-%W, \-\-callback\fR ]
+[ \fB\-y, \-\-background\-on\-suspend\fR ]
 [ \fB\-K, \-\-keep\-links[=N]\fR ]
 .SH DESCRIPTION
 .B httrack
@@ -195,6 +198,10 @@ delayed type check, don't make any link test but wait for files download to star
 cached delayed type check, don't wait for remote type during updates, to speedup them (%D0 wait, * %D1 don't wait) (\-\-cached\-delayed\-type\-check)
 .IP \-%M
 generate a RFC MIME\-encapsulated full\-archive (.mht) (\-\-mime\-html)
+.IP \-%r
+write an ISO\-28500 WARC/1.1 archive; \-\-warc\-file NAME sets the output name (\-\-warc)
+.IP \-%t
+keep the original file extension, don't rewrite it from the MIME type (%t0 rewrite)
 .IP \-LN
 long names (L1 *long names / L0 8\-3 conversion / L2 ISO9660 compatible) (\-\-long\-names[=N])
 .IP \-KN
@@ -232,6 +239,8 @@ follow robots.txt and meta robots tags (0=never,1=sometimes,* 2=always, 3=always
 force HTTP/1.0 requests (reduce update features, only for old servers or proxies) (\-\-http\-10)
 .IP \-%k
 use keep\-alive if possible, greately reducing latency for small files and test requests (%k0 don't use) (\-\-keep\-alive)
+.IP \-%z
+do not request compressed content (%z0 request) (\-\-disable\-compression)
 .IP \-%B
 tolerant requests (accept bogus responses on some servers, but not standard!) (\-\-tolerant)
 .IP \-%s
@@ -258,7 +267,7 @@ default referer field sent in HTTP headers (\-\-referer <param>)
 .IP \-%E
 from email address sent in HTTP headers (\-\-from <param>)
 .IP \-%F
-footer string in Html code (\-%F "Mirrored [from host %s [file %s [at %s]]]" (\-\-footer <param>)
+footer string in Html code (\-%F "Mirrored from {url} on {date}"; fields {addr} {path} {url} {date} {lastmodified} {version} {mime} {charset} {status} {size}, or legacy %s) (\-\-footer <param>)
 .IP \-%l
 preferred language (\-%l "fr, en, jp, *" (\-\-language <param>)
 .IP \-%a
@@ -326,8 +335,6 @@ go everywhere on the web (\-\-go\-everywhere)
 .IP \-%H
 debug HTTP headers in logfile (\-\-debug\-headers)
 .SS Guru options: (do NOT use if possible)
-.IP \-#X
-*use optimized engine (limited memory boundary checks) (\-\-fast\-engine)
 .IP \-#test
 list engine self\-tests (run one with \-#test=NAME [args])
 .IP \-#C
@@ -352,8 +359,6 @@ maximum number of links (\-#L1000000) (\-\-advanced\-maxlinks[=N])
 display ugly progress information (\-\-advanced\-progressinfo)
 .IP \-#P
 catch URL (\-\-catch\-url)
-.IP \-#R
-old FTP routines (debug) (\-\-repair\-cache)
 .IP \-#T
 generate transfer ops. log every minutes (\-\-debug\-xfrstats)
 .IP \-#u
@@ -372,6 +377,8 @@ USE IT WITH EXTREME CARE
 execute system command after each files ($0 is the filename: \-V "rm \\$0") (\-\-userdef\-cmd <param>)
 .IP \-%W
 use an external library function as a wrapper (\-%W myfoo.so[,myparameters]) (\-\-callback <param>)
+.IP \-y
+go to background when suspended (y0 don't) (\-\-background\-on\-suspend)
 .SS Details: Option N
 .IP \-N0
 Site\-structure (default)

src/Makefile.am

@@ -63,7 +63,7 @@ libhttrack_la_SOURCES =  htscore.c htsparse.c htsback.c htscache.c \
 	htshelp.c htslib.c htsurlport.c htscoremain.c \
 	htsname.c htsrobots.c htstools.c htswizard.c \
 	htsalias.c htsthread.c htsindex.c htsbauth.c \
-	htsmd5.c htscodec.c htsproxy.c htszlib.c htswrap.c htsconcat.c \
+	htsmd5.c htscodec.c htswarc.c htsproxy.c htszlib.c htswrap.c htsconcat.c \
 	htsmodules.c htscharset.c punycode.c htsencoding.c htssniff.c \
 	md5.c \
 	minizip/ioapi.c minizip/mztools.c minizip/unzip.c minizip/zip.c \
@@ -74,7 +74,7 @@ libhttrack_la_SOURCES =  htscore.c htsparse.c htsback.c htscache.c \
 	htshelp.h htsindex.h htslib.h htsurlport.h htsmd5.h \
 	htsmodules.h htsname.h htsnet.h htssniff.h \
 	htsopt.h htsrobots.h htsthread.h  \
-	htstools.h htswizard.h htswrap.h htscodec.h htsproxy.h htszlib.h  \
+	htstools.h htswizard.h htswrap.h htscodec.h htswarc.h htsproxy.h htszlib.h  \
 	htsstrings.h htsarrays.h httrack-library.h \
 	htscharset.h punycode.h htsencoding.h \
 	htsentities.h htsentities.sh htsbasiccharsets.sh htscodepages.h \

src/htsalias.c

@@ -114,6 +114,8 @@ const char *hts_optalias[][4] = {
    "strip [host/pattern=]key1,key2,... from URLs"},
   {"cookies-file", "-%K", "param1",
    "load extra cookies from a Netscape cookies.txt"},
+  {"warc", "-%r", "single", "write an ISO-28500 WARC/1.1 archive of the crawl"},
+  {"warc-file", "-%rf", "param1", "write a WARC archive to the given base name"},
   {"why", "-%Y", "param1",
    "explain which filter rule accepts or rejects a URL, then exit"},
   {"pause", "-%G", "param1",

src/htsback.c

@@ -37,6 +37,7 @@ Please visit our Website: http://www.httrack.com
 /* specific definitions */
 #include "htsnet.h"
 #include "htscore.h"
+#include "htswarc.h"
 #include "htsthread.h"
 #include <time.h>
 /* END specific definitions */
@@ -979,6 +980,10 @@ int back_finalize(httrackp * opt, cache_back * cache, struct_back * sback,
         // status finished callback
         RUN_CALLBACK1(opt, xfrstatus, &back[p]);
 
+        // WARC archive of the transaction (request + response/revisit)
+        if (StringNotEmpty(opt->warc_file))
+          warc_write_backtransaction(opt, &back[p]);
+
         return 0;
       } else {                  // testmode
         if (back[p].r.statuscode / 100 >= 3) {  /* Store 3XX, 4XX, 5XX test response codes, but NOT 2XX */
@@ -1055,6 +1060,8 @@ void back_copy_static(const lien_back * src, lien_back * dst) {
   dst->r.soc = INVALID_SOCKET;
   dst->r.adr = NULL;
   dst->r.headers = NULL;
+  dst->r.warc_reqhdr = NULL;
+  dst->r.warc_resphdr = NULL;
   dst->r.out = NULL;
   dst->r.location = dst->location_buffer;
   dst->r.fp = NULL;
@@ -1118,6 +1125,8 @@ int back_unserialize(FILE * fp, lien_back ** dst) {
     (*dst)->chunk_adr = NULL;
     (*dst)->r.adr = NULL;
     (*dst)->r.out = NULL;
+    (*dst)->r.warc_reqhdr = NULL;
+    (*dst)->r.warc_resphdr = NULL;
     (*dst)->r.location = (*dst)->location_buffer;
     (*dst)->r.fp = NULL;
     (*dst)->r.soc = INVALID_SOCKET;
@@ -1585,6 +1594,7 @@ int back_clear_entry(lien_back * back) {
       freet(back->r.headers);
       back->r.headers = NULL;
     }
+    warc_free_request(&back->r);
     // Tout nettoyer
     memset(back, 0, sizeof(lien_back));
     back->r.soc = INVALID_SOCKET;
@@ -3631,6 +3641,10 @@ void back_wait(struct_back * sback, httrackp * opt, cache_back * cache,
                     deleteaddr(&back[i].r);
                     back[i].r.headers = block;
                   }
+                  // Stash the raw response headers for WARC (deletehttp frees
+                  // r.headers when the socket closes, before back_finalize)
+                  if (StringNotEmpty(opt->warc_file))
+                    warc_stash_response(&back[i].r, back[i].r.headers);
 
                   /* 
                      Status code and header-response hacks

src/htscore.c

@@ -39,6 +39,7 @@ Please visit our Website: http://www.httrack.com
 
 /* File defs */
 #include "htscore.h"
+#include "htswarc.h"
 
 /* specific definitions */
 #include "htsbase.h"
@@ -2245,6 +2246,7 @@ int httpmirror(char *url1, httrackp * opt) {
 
   // ending
   usercommand(opt, 0, NULL, NULL, NULL, NULL);
+  warc_close_opt(opt);
 
   // désallocation mémoire & buffers
   XH_uninit;
@@ -3628,6 +3630,9 @@ HTSEXT_API int copy_htsopt(const httrackp * from, httrackp * to) {
   if (StringNotEmpty(from->cookies_file))
     StringCopyS(to->cookies_file, from->cookies_file);
 
+  if (StringNotEmpty(from->warc_file))
+    StringCopyS(to->warc_file, from->warc_file);
+
   if (from->pause_max_ms > 0) {
     to->pause_min_ms = from->pause_min_ms;
     to->pause_max_ms = from->pause_max_ms;

src/htscoremain.c

@@ -40,6 +40,7 @@ Please visit our Website: http://www.httrack.com
 #include "htscore.h"
 #include "htsdefines.h"
 #include "htsalias.h"
+#include "htswarc.h"
 #include "htsbauth.h"
 #include "htswrap.h"
 #include "htsmodules.h"
@@ -1622,10 +1623,9 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
                 if ((na + 1 >= argc) || (argv[na + 1][0] == '-')) {
                   HTS_PANIC_PRINTF
                     ("Option %F needs to be followed by a blank space, and a footer string");
-                  printf
-                    ("Example: -%%F \"<!-- Mirrored from %%s by HTTrack Website Copier/"
-                     HTTRACK_AFF_VERSION " " HTTRACK_AFF_AUTHORS
-                     ", %%s -->\"\n");
+                  printf("Example: -%%F \"<!-- Mirrored from {addr}{path} by "
+                         "HTTrack Website Copier/"
+                         "{version} " HTTRACK_AFF_AUTHORS ", {date} -->\"\n");
                   htsmain_free();
                   return -1;
                 } else {
@@ -1790,6 +1790,26 @@ static int hts_main_internal(int argc, char **argv, httrackp * opt) {
                   StringCopy(opt->cookies_file, argv[na]);
                 }
                 break;
+              case 'r': // warc / warc-file: write an ISO-28500 WARC archive
+                if (*(com + 1) == 'f') { // --warc-file NAME: explicit basename
+                  com++;
+                  if ((na + 1 >= argc) || (argv[na + 1][0] == '-')) {
+                    HTS_PANIC_PRINTF(
+                        "Option warc-file needs a blank space and a WARC name");
+                    htsmain_free();
+                    return -1;
+                  }
+                  na++;
+                  if (strlen(argv[na]) >= 1024) {
+                    HTS_PANIC_PRINTF("WARC file name too long");
+                    htsmain_free();
+                    return -1;
+                  }
+                  StringCopy(opt->warc_file, argv[na]);
+                } else { // --warc: auto-named archive under the output dir
+                  StringCopy(opt->warc_file, WARC_AUTONAME);
+                }
+                break;
               case 'Y': // why: explain the filter verdict for a URL, no crawl
                 if ((na + 1 >= argc) || (argv[na + 1][0] == '-')) {
                   HTS_PANIC_PRINTF("Option why needs a blank space and a URL");

src/htshelp.c

@@ -524,6 +524,10 @@ void help(const char *app, int more) {
   infomsg
     (" %D  cached delayed type check, don't wait for remote type during updates, to speedup them (%D0 wait, * %D1 don't wait)");
   infomsg(" %M  generate a RFC MIME-encapsulated full-archive (.mht)");
+  infomsg(" %r  write an ISO-28500 WARC/1.1 archive; --warc-file NAME sets the "
+          "output name");
+  infomsg(" %t  keep the original file extension, don't rewrite it from the "
+          "MIME type (%t0 rewrite)");
   infomsg
     ("  LN long names (L1 *long names / L0 8-3 conversion / L2 ISO9660 compatible)");
   infomsg
@@ -554,6 +558,7 @@ void help(const char *app, int more) {
     (" %h  force HTTP/1.0 requests (reduce update features, only for old servers or proxies)");
   infomsg
     (" %k  use keep-alive if possible, greately reducing latency for small files and test requests (%k0 don't use)");
+  infomsg(" %z  do not request compressed content (%z0 request)");
   infomsg
     (" %B  tolerant requests (accept bogus responses on some servers, but not standard!)");
   infomsg
@@ -578,8 +583,10 @@ void help(const char *app, int more) {
     ("  F  user-agent field sent in HTTP headers (-F \"user-agent name\")");
   infomsg(" %R  default referer field sent in HTTP headers");
   infomsg(" %E  from email address sent in HTTP headers");
-  infomsg
-    (" %F  footer string in Html code (-%F \"Mirrored [from host %s [file %s [at %s]]]\"");
+  infomsg(
+      " %F  footer string in Html code (-%F \"Mirrored from {url} on "
+      "{date}\"; fields {addr} {path} {url} {date} {lastmodified} {version} "
+      "{mime} {charset} {status} {size}, or legacy %s)");
   infomsg(" %l  preferred language (-%l \"fr, en, jp, *\"");
   infomsg(" %a  accepted formats (-%a \"text/html,image/png;q=0.9,*/*;q=0.1\"");
   infomsg(" %X  additional HTTP header line (-%X \"X-Magic: 42\"");
@@ -620,7 +627,6 @@ void help(const char *app, int more) {
   infomsg(" %H  debug HTTP headers in logfile");
   infomsg("");
   infomsg("Guru options: (do NOT use if possible)");
-  infomsg(" #X *use optimized engine (limited memory boundary checks)");
   infomsg(" #test  list engine self-tests (run one with -#test=NAME [args])");
   infomsg(" #C  cache list (-#C '*.com/spider*.gif'");
   infomsg(" #R  cache repair (damaged cache)");
@@ -633,7 +639,6 @@ void help(const char *app, int more) {
   infomsg(" #L  maximum number of links (-#L1000000)");
   infomsg(" #p  display ugly progress information");
   infomsg(" #P  catch URL");
-  infomsg(" #R  old FTP routines (debug)");
   infomsg(" #T  generate transfer ops. log every minutes");
   infomsg(" #u  wait time");
   infomsg(" #Z  generate transfer rate statistics every minutes");
@@ -650,6 +655,7 @@ void help(const char *app, int more) {
     ("  V execute system command after each files ($0 is the filename: -V \"rm \\$0\")");
   infomsg(" %W use an external library function as a wrapper (-%W "
           "myfoo.so[,myparameters])");
+  infomsg("  y  go to background when suspended (y0 don't)");
   infomsg("");
   infomsg("Details: Option N");
   infomsg("  N0 Site-structure (default)");

src/htslib.c

@@ -36,6 +36,7 @@ Please visit our Website: http://www.httrack.com
 // Fichier librairie .c
 
 #include "htscore.h"
+#include "htswarc.h"
 
 /* specific definitions */
 #include "htsbase.h"
@@ -1201,6 +1202,11 @@ int http_sendhead(httrackp * opt, t_cookie * cookie, int mode,
   }                             // Fin test pas postfile
   //
 
+  // Stash the raw request for the WARC request record (freed at
+  // back_clear_entry)
+  if (StringNotEmpty(opt->warc_file))
+    warc_stash_request(retour, bstr.buffer);
+
   // Callback
   {
     int test_head =
@@ -2114,6 +2120,8 @@ htsblk http_test(httrackp * opt, const char *adr, const char *fil, char *loc) {
 #if HTS_DEBUG_CLOSESOCK
     DEBUG_W("http_test: deletehttp\n");
 #endif
+    // this probe's htsblk is discarded by callers, so free any WARC stash here
+    warc_free_request(&retour);
     deletehttp(&retour);
     retour.soc = INVALID_SOCKET;
   }
@@ -6010,6 +6018,7 @@ HTSEXT_API httrackp *hts_create_opt(void) {
   StringCopy(opt->footer, HTS_DEFAULT_FOOTER);
   StringCopy(opt->strip_query, "");
   StringCopy(opt->cookies_file, "");
+  StringCopy(opt->warc_file, "");
   StringCopy(opt->why_url, "");
   opt->pause_min_ms = 0;
   opt->pause_max_ms = 0;
@@ -6161,6 +6170,7 @@ HTSEXT_API void hts_free_opt(httrackp * opt) {
     StringFree(opt->strip_query);
     StringFree(opt->cookies_file);
     StringFree(opt->why_url);
+    StringFree(opt->warc_file);
 
     StringFree(opt->path_html);
     StringFree(opt->path_html_utf8);

src/htsopt.h

@@ -256,6 +256,7 @@ struct htsoptstate {
   unsigned int debug_state;
   unsigned int tmpnameid; /**< counter for temporary file names */
   int is_ended;           /**< mirror has finished */
+  void *warc;             /**< open WARC writer (warc_writer*), or NULL */
 };
 
 /* Library handles */
@@ -538,6 +539,8 @@ struct httrackp {
   int pause_max_ms; /**< inter-file pause upper bound, ms */
   String why_url;   /**< URL to diagnose (--why): print the deciding filter rule
                          and exit without crawling */
+  String warc_file; /**< WARC output: WARC_AUTONAME for --warc, or the
+                         --warc-file basename (appended at the tail: ABI) */
 };
 
 /* Running statistics for a mirror. */
@@ -661,6 +664,9 @@ struct htsblk {
   /* Restart-whole signal: a resume this response rejected (unusable 206) must
      retry with no Range, else a surviving partial/temp-ref loops (#581). */
   hts_boolean refetch_wholefile;
+  char *warc_reqhdr; /**< stashed raw request header block for WARC (or NULL) */
+  char *
+      warc_resphdr; /**< stashed raw response header block for WARC (or NULL) */
   /*char digest[32+2];   // md5 digest generated by the engine ("" if none) */
 };
 

src/htsparse.c

@@ -792,17 +792,72 @@ int htsparse(htsmoduleStruct * str, htsmoduleStructExtended * stre) {
                   char gmttime[256];
                   char BIGSTK safe_adr[HTS_URLMAXSIZE * 3 + 4];
                   char BIGSTK safe_fil[HTS_URLMAXSIZE * 3 + 4];
+                  char BIGSTK safe_url[HTS_URLMAXSIZE * 6 + 16];
+                  char safe_lastmod[sizeof(r->lastmodified) * 3 + 4];
+                  char safe_ctype[sizeof(r->contenttype) * 3 + 4];
+                  char safe_charset[sizeof(r->charset) * 3 + 4];
+                  char status_str[16];
+                  char size_str[32];
+                  // {url} scheme: jump_identification_const strips it for
+                  // http/https/ftp, so re-add it (bare host is http); for any
+                  // other scheme the host keeps its "scheme://" and we add
+                  // none.
+                  const char *const url_host =
+                      jump_identification_const(urladr());
+                  const char *const url_scheme =
+                      strstr(url_host, "://") != NULL  ? ""
+                      : strfield(urladr(), "https://") ? "https://"
+                      : strfield(urladr(), "ftp://")   ? "ftp://"
+                                                       : "http://";
 
-                  tempo[0] = '\0';
+                  // {addr}/{path} are the escaped host and remote path; {url}
+                  // prepends the scheme to them (credentials already stripped
+                  // by jump_identification_const, and the scheme is a safe
+                  // literal, so no re-escaping is needed).
+                  html_inline_safe(url_host, safe_adr, sizeof(safe_adr));
+                  html_inline_safe(urlfil(), safe_fil, sizeof(safe_fil));
+                  snprintf(safe_url, sizeof(safe_url), "%s%s%s", url_scheme,
+                           safe_adr, safe_fil);
+                  snprintf(status_str, sizeof(status_str), "%d", r->statuscode);
+                  snprintf(size_str, sizeof(size_str), LLintP, (LLint) r->size);
                   time_gmt_rfc822(gmttime);
-                  strcatbuff(tempo, eol);
-                  hts_template_format_str(tempo + strlen(tempo), sizeof(tempo) - strlen(tempo),
-                          StringBuff(opt->footer),
-                          html_inline_safe(jump_identification_const(urladr()), safe_adr, sizeof(safe_adr)),
-                          html_inline_safe(urlfil(), safe_fil, sizeof(safe_fil)), gmttime,
-                          HTTRACK_VERSIONID, /* EOF */ NULL);
-                  strcatbuff(tempo, eol);
-                  HT_ADD(tempo);
+
+                  {
+                    // Every network-derived string is html_inline_safe()'d: the
+                    // footer sits inside an HTML comment, so a value holding
+                    // "-->" would otherwise close it and inject markup (#165).
+                    // status/size are formatted integers and need no escaping.
+                    const hts_footer_field fields[] = {
+                        {"addr", safe_adr},
+                        {"path", safe_fil},
+                        {"url", safe_url},
+                        {"date", gmttime},
+                        {"lastmodified",
+                         html_inline_safe(r->lastmodified, safe_lastmod,
+                                          sizeof(safe_lastmod))},
+                        {"version", HTTRACK_VERSIONID},
+                        {"mime", html_inline_safe(r->contenttype, safe_ctype,
+                                                  sizeof(safe_ctype))},
+                        {"charset", html_inline_safe(r->charset, safe_charset,
+                                                     sizeof(safe_charset))},
+                        {"status", status_str},
+                        {"size", size_str},
+                    };
+
+                    tempo[0] = '\0';
+                    strcatbuff(tempo, eol);
+                    // hts_footer_format returns <0 on overflow, leaving tempo
+                    // unterminated; emitting it would abort in strcatbuff
+                    // below.
+                    if (hts_footer_format(tempo + strlen(tempo),
+                                          sizeof(tempo) - strlen(tempo),
+                                          StringBuff(opt->footer), fields,
+                                          sizeof(fields) / sizeof(fields[0])) >=
+                        0) {
+                      strcatbuff(tempo, eol);
+                      HT_ADD(tempo);
+                    }
+                  }
                 }
                 // Emit charset ?
                 if (emited_footer == 1 && strnotempty(r->charset)) {

src/htsselftest.c

@@ -57,6 +57,7 @@ Please visit our Website: http://www.httrack.com
 #include "htssniff.h"
 #include "htscodec.h"
 #include "htsproxy.h"
+#include "htswarc.h"
 #if HTS_USEZLIB
 #include "htszlib.h"
 #endif
@@ -971,6 +972,47 @@ static int st_entities(httrackp *opt, int argc, char **argv) {
   return 0;
 }
 
+// -#test=footerfmt <template>: expand a -%F footer with fixed fields (drives
+// tests/01_engine-footerfmt.test). Also asserts the overflow/zero-size returns
+// the CLI cap keeps out of reach.
+static int st_footerfmt(httrackp *opt, int argc, char **argv) {
+  static const hts_footer_field fields[] = {
+      {"addr", "host.example"},
+      {"path", "/dir/page.html"},
+      {"url", "http://host.example/dir/page.html"},
+      {"date", "DATE"},
+      {"lastmodified", "LASTMOD"},
+      {"version", "VER"},
+      {"mime", "text/html"},
+      {"charset", "utf-8"},
+      {"status", "200"},
+      {"size", "1234"},
+  };
+  const size_t nfields = sizeof(fields) / sizeof(fields[0]);
+  char out[1024];
+  char tiny[4];
+
+  (void) opt;
+  // Overflow (named and legacy) and a zero-size buffer must return <0, never
+  // truncate silently or write out of bounds.
+  assertf(hts_footer_format(tiny, sizeof(tiny), "{addr}", fields, nfields) < 0);
+  assertf(hts_footer_format(tiny, sizeof(tiny), "a %s b", fields, nfields) < 0);
+  assertf(hts_footer_format(out, 0, "", fields, nfields) < 0);
+  // An empty template yields an empty, terminated string.
+  assertf(hts_footer_format(out, sizeof(out), "", fields, nfields) == 1 &&
+          out[0] == '\0');
+  if (argc < 1) {
+    fprintf(stderr, "footerfmt: needs a template\n");
+    return 1;
+  }
+  if (hts_footer_format(out, sizeof(out), argv[0], fields, nfields) < 0) {
+    fprintf(stderr, "footerfmt: overflow\n");
+    return 1;
+  }
+  printf("%s\n", out);
+  return 0;
+}
+
 /* The unescapers must reserve one byte for the trailing NUL: a 'max'-byte
    dest holding 'max' output chars pre-fix wrote dest[max] (1-byte OOB, caught
    by ASan). Both unescapeEntities and unescapeUrl share the guard. */
@@ -1260,6 +1302,13 @@ static int st_copyopt(httrackp *opt, int argc, char **argv) {
   if (strcmp(StringBuff(to->cookies_file), "/tmp/jar.txt") != 0)
     err = 1;
 
+  /* warc_file: same String deep-copy path as cookies_file */
+  StringCopy(from->warc_file, "run.warc.gz");
+  StringCopy(to->warc_file, "");
+  copy_htsopt(from, to);
+  if (strcmp(StringBuff(to->warc_file), "run.warc.gz") != 0)
+    err = 1;
+
   /* #185 pause pair: copied when enabled (max>0), the 0 sentinel skips */
   from->pause_min_ms = 5000;
   from->pause_max_ms = 10000;
@@ -3215,6 +3264,276 @@ static int st_ftpuser(httrackp *opt, int argc, char **argv) {
   return 0;
 }
 
+/* Bounded substring search (records carry NUL bytes; strstr won't do). */
+static const char *warc_memstr(const char *hay, const char *needle,
+                               size_t haylen, size_t nlen) {
+  if (nlen == 0 || haylen < nlen)
+    return NULL;
+  {
+    size_t i;
+    for (i = 0; i + nlen <= haylen; i++) {
+      if (memcmp(hay + i, needle, nlen) == 0)
+        return hay + i;
+    }
+  }
+  return NULL;
+}
+
+/* Slurp a whole file into a malloc'd buffer; sets *len. NULL on error. */
+static unsigned char *warc_slurp(const char *path, size_t *len) {
+  FILE *f = FOPEN(path, "rb");
+  unsigned char *buf;
+  long sz;
+  if (f == NULL)
+    return NULL;
+  if (fseek(f, 0, SEEK_END) != 0 || (sz = ftell(f)) < 0) {
+    fclose(f);
+    return NULL;
+  }
+  rewind(f);
+  buf = malloct((size_t) sz + 1);
+  if (buf == NULL) {
+    fclose(f);
+    return NULL;
+  }
+  *len = fread(buf, 1, (size_t) sz, f);
+  fclose(f);
+  return buf;
+}
+
+/* Inflate one gzip member at *in (limit end); returns the decompressed record
+   in a malloc'd buffer (*out_len), advancing *in past the member. NULL at end
+   or on error (*out_len distinguishes: 0 and NULL = clean end). */
+static unsigned char *warc_next_member(const unsigned char **in,
+                                       const unsigned char *end,
+                                       size_t *out_len) {
+  z_stream zs;
+  unsigned char *out = NULL;
+  size_t len = 0;
+  int zerr;
+  *out_len = 0;
+  if (*in >= end)
+    return NULL;
+  memset(&zs, 0, sizeof(zs));
+  if (inflateInit2(&zs, 15 + 32) != Z_OK)
+    return NULL;
+  zs.next_in = (const Bytef *) *in;
+  zs.avail_in = (uInt) (end - *in);
+  do {
+    unsigned char tmp[8192];
+    size_t got;
+    zs.next_out = tmp;
+    zs.avail_out = sizeof(tmp);
+    zerr = inflate(&zs, Z_NO_FLUSH);
+    if (zerr != Z_OK && zerr != Z_STREAM_END) {
+      freet(out);
+      inflateEnd(&zs);
+      return NULL;
+    }
+    got = sizeof(tmp) - zs.avail_out;
+    if (got > 0) {
+      unsigned char *n = realloct(out, len + got + 1);
+      if (n == NULL) {
+        freet(out);
+        inflateEnd(&zs);
+        return NULL;
+      }
+      out = n;
+      memcpy(out + len, tmp, got);
+      len += got;
+    }
+  } while (zerr != Z_STREAM_END);
+  *in = (const unsigned char *) zs.next_in; /* start of the next member */
+  inflateEnd(&zs);
+  if (out != NULL)
+    out[len] = '\0';
+  *out_len = len;
+  return out;
+}
+
+/* Feed a synthetic transaction and validate the resulting .warc.gz against the
+   WARC/1.1 spec: each record a self-standing gzip member starting WARC/1.,
+   Content-Length == block length, the \r\n\r\n trailer intact, the response
+   body round-trips, and the encoding headers are stripped (strategy B). */
+static int st_warc(httrackp *opt, int argc, char **argv) {
+  char path[HTS_URLMAXSIZE];
+  warc_writer *w;
+  unsigned char *data;
+  size_t data_len = 0;
+  const unsigned char *p, *end;
+  int err = 0, nrec = 0, nresp = 0, nreq = 0, nrevisit = 0, ninfo = 0;
+  int seen_a_body = 0, body_occurrences = 0, a2_bodyless = 0, nm_cl_ok = 0;
+  static const char a_body[] = "Hello, WARC!\n";
+
+  if (argc < 1) {
+    fprintf(stderr, "warc: needs a writable directory\n");
+    return 1;
+  }
+  fconcat(path, sizeof(path), argv[0], "warc-selftest.warc.gz");
+
+  w = warc_open(opt, path);
+  assertf(w != NULL);
+
+  /* 200 HTML: bogus Content-Length + gzip/chunked encodings must be stripped.
+   */
+  warc_write_transaction(
+      w, "http://test.local/a.html", "127.0.0.1",
+      "GET /a.html HTTP/1.1\r\nHost: test.local\r\n\r\n",
+      "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nContent-Encoding: "
+      "gzip\r\nTransfer-Encoding: chunked\r\nContent-Length: 999\r\n\r\n",
+      a_body, sizeof(a_body) - 1, NULL, 200, 0);
+
+  /* 302 redirect: header-only, no body. */
+  warc_write_transaction(
+      w, "http://test.local/r", "127.0.0.1",
+      "GET /r HTTP/1.1\r\nHost: test.local\r\n\r\n",
+      "HTTP/1.1 302 Found\r\nLocation: http://test.local/a.html\r\n\r\n", NULL,
+      0, NULL, 302, 0);
+
+  /* 200 binary, chunked coding on the wire (already de-chunked here). */
+  warc_write_transaction(
+      w, "http://test.local/b.bin", "127.0.0.1",
+      "GET /b.bin HTTP/1.1\r\nHost: test.local\r\n\r\n",
+      "HTTP/1.1 200 OK\r\nContent-Type: application/octet-stream\r\n"
+      "Transfer-Encoding: chunked\r\n\r\n",
+      "\x00\x01\x02\x03\x04", 5, NULL, 200, 0);
+
+  /* 200 with a body shorter than the declared Content-Length (rewritten). */
+  warc_write_transaction(
+      w, "http://test.local/trunc", "127.0.0.1",
+      "GET /trunc HTTP/1.1\r\nHost: test.local\r\n\r\n",
+      "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: "
+      "100\r\n\r\n",
+      "short", 5, NULL, 200, 0);
+
+  /* Same payload as a.html at a new URL: identical-payload-digest revisit
+     (OpenSSL builds only; a plain build writes a second full response). */
+  warc_write_transaction(w, "http://test.local/a2.html", "127.0.0.1",
+                         "GET /a2.html HTTP/1.1\r\nHost: test.local\r\n\r\n",
+                         "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n",
+                         a_body, sizeof(a_body) - 1, NULL, 200, 0);
+
+  /* 304 revisit with an EMPTY response-header block: the block is just the
+     2-byte separator, so declared Content-Length must be exactly 2 (F3). */
+  warc_write_transaction(w, "http://test.local/nm", "127.0.0.1",
+                         "GET /nm HTTP/1.1\r\nHost: test.local\r\n\r\n", "",
+                         NULL, 0, NULL, 304, 1);
+
+  warc_close(w);
+
+  data = warc_slurp(path, &data_len);
+  assertf(data != NULL);
+  p = data;
+  end = data + data_len;
+
+  while (p < end) {
+    size_t rlen = 0;
+    unsigned char *rec = warc_next_member(&p, end, &rlen);
+    const char *sep, *cl;
+    long long block_len = 0; /* 0 on a parse failure; err is already set */
+    size_t hdr_len;
+    if (rec == NULL) {
+      if (rlen == 0)
+        break; /* clean end */
+      err = 1;
+      break;
+    }
+    nrec++;
+    /* magic */
+    if (rlen < 8 || memcmp(rec, "WARC/1.", 7) != 0)
+      err = 1;
+    /* record header ends at the first blank line */
+    sep = warc_memstr((char *) rec, "\r\n\r\n", rlen, 4);
+    if (sep == NULL) {
+      err = 1;
+      freet(rec);
+      continue;
+    }
+    hdr_len = (size_t) ((const unsigned char *) sep - rec) + 4;
+    /* Content-Length must equal the actual block length */
+    cl = warc_memstr((char *) rec, "Content-Length:", hdr_len, 15);
+    if (cl == NULL || sscanf(cl + 15, "%lld", &block_len) != 1)
+      err = 1;
+    else {
+      if (hdr_len + (size_t) block_len + 4 != rlen)
+        err = 1; /* header + block + trailing CRLFCRLF */
+      else if (memcmp(rec + hdr_len + block_len, "\r\n\r\n", 4) != 0)
+        err = 1; /* trailer intact */
+    }
+    if (warc_memstr((char *) rec, "WARC-Type: warcinfo", hdr_len, 19) != NULL)
+      ninfo++;
+    if (warc_memstr((char *) rec, "WARC-Type: request", hdr_len, 18) != NULL)
+      nreq++;
+    if (warc_memstr((char *) rec, "WARC-Type: response", hdr_len, 19) != NULL)
+      nresp++;
+    if (warc_memstr((char *) rec, "WARC-Type: revisit", hdr_len, 18) != NULL)
+      nrevisit++;
+    /* F1: the full body must appear exactly once across the whole file (a
+       revisit must not re-embed it). */
+    if (warc_memstr((char *) rec, a_body, rlen, sizeof(a_body) - 1) != NULL)
+      body_occurrences++;
+    /* F1: the a2.html identical-payload-digest revisit carries no body. */
+    if (warc_memstr((char *) rec, "WARC-Target-URI: http://test.local/a2.html",
+                    hdr_len, 42) != NULL &&
+        warc_memstr((char *) rec, "WARC-Type: revisit", hdr_len, 18) != NULL)
+      a2_bodyless =
+          (warc_memstr((char *) rec, a_body, rlen, sizeof(a_body) - 1) == NULL);
+    /* F3: the empty-header 304 revisit block is exactly the 2-byte separator
+       (the request record shares this target URI, so match the revisit only).
+     */
+    if (warc_memstr((char *) rec, "WARC-Target-URI: http://test.local/nm",
+                    hdr_len, 37) != NULL &&
+        warc_memstr((char *) rec, "WARC-Type: revisit", hdr_len, 18) != NULL)
+      nm_cl_ok = (block_len == 2);
+    /* a.html response body must round-trip and carry no encoding headers */
+    if (warc_memstr((char *) rec, "WARC-Target-URI: http://test.local/a.html",
+                    hdr_len, 41) != NULL &&
+        warc_memstr((char *) rec, "msgtype=response", hdr_len, 16) != NULL) {
+      const char *bsep = warc_memstr((char *) rec + hdr_len, "\r\n\r\n",
+                                     (size_t) block_len, 4);
+      if (bsep == NULL)
+        err = 1;
+      else {
+        size_t bodyoff = (size_t) (bsep - (char *) rec) + 4;
+        size_t got = rlen - 4 - bodyoff; /* minus record trailer */
+        if (got != sizeof(a_body) - 1 ||
+            memcmp(rec + bodyoff, a_body, got) != 0)
+          err = 1;
+        seen_a_body = 1;
+      }
+      if (warc_memstr((char *) rec, "Content-Encoding", hdr_len + block_len,
+                      16) != NULL ||
+          warc_memstr((char *) rec, "Transfer-Encoding", hdr_len + block_len,
+                      17) != NULL)
+        err = 1;
+    }
+    freet(rec);
+  }
+  freet(data);
+
+  /* warcinfo + 6 transactions (response/revisit + request each) = 13 records.
+   */
+  if (ninfo != 1 || nreq != 6 || nrec != 13 || !seen_a_body || !nm_cl_ok)
+    err = 1;
+#if HTS_USEOPENSSL
+  /* a.html + b.bin + trunc + 302 are full responses; a2.html deduped to a
+     revisit (bodyless), nm is the 304 revisit; the body appears exactly once.
+   */
+  if (nrevisit != 2 || nresp != 4 || !a2_bodyless || body_occurrences != 1)
+    err = 1;
+#else
+  /* No digests: a2.html is a second full response, so the body appears twice
+     and only the 304 nm is a revisit. */
+  if (nrevisit != 1 || nresp != 5 || body_occurrences != 2)
+    err = 1;
+  (void) a2_bodyless; /* only meaningful with digests */
+#endif
+
+  printf("warc: %d records (%d response, %d request, %d revisit): %s\n", nrec,
+         nresp, nreq, nrevisit, err ? "FAIL" : "OK");
+  return err;
+}
+
 /* ------------------------------------------------------------ */
 /* Registry: name -> handler, with a usage hint and a one-line description. */
 /* ------------------------------------------------------------ */
@@ -3257,6 +3576,8 @@ static const struct selftest_entry {
     {"idna-decode", "<host>", "decode an IDNA/punycode hostname",
      st_idna_decode},
     {"entities", "<string> [encoding]", "unescape HTML entities", st_entities},
+    {"footerfmt", "<template>", "-%F footer positional/named expansion",
+     st_footerfmt},
     {"unescape-bounds", "", "unescapers reserve the NUL byte (no 1-byte OOB)",
      st_unescape_bounds},
     {"hashtable", "<count|file>", "coucal hashtable stress test", st_hashtable},
@@ -3332,6 +3653,8 @@ static const struct selftest_entry {
     {"ftp-line", "", "get_ftp_line bounds a hostile FTP reply line",
      st_ftpline},
     {"ftp-userpass", "", "ftp_split_userpass bounds URL userinfo", st_ftpuser},
+    {"warc", "<dir>", "WARC/1.1 writer: framing, digests, revisit dedup",
+     st_warc},
 };
 
 static void list_selftests(void) {

src/htstools.c

@@ -754,35 +754,48 @@ typedef struct hts_template_format_buf {
   size_t offset;
 } hts_template_format_buf;
 
+// Bounded append to a template buffer (or FILE); returns -1 on overflow/error.
+static int htsfmt_putc(hts_template_format_buf *buf, char c) {
+  if (buf->fp != NULL) {
+    assertf(buf->buffer == NULL);
+    if (fputc(c, buf->fp) < 0)
+      return -1;
+  } else {
+    assertf(buf->buffer != NULL);
+    if (buf->offset + 1 < buf->size)
+      buf->buffer[buf->offset++] = c;
+    else
+      return -1;
+  }
+  return 0;
+}
+
+static int htsfmt_puts(hts_template_format_buf *buf, const char *s) {
+  size_t i;
+  assertf(s != NULL);
+  for (i = 0; s[i] != '\0'; i++) {
+    if (htsfmt_putc(buf, s[i]) < 0)
+      return -1;
+  }
+  return 0;
+}
+
 // note: upstream arg list MUST be NULL-terminated for safety
 // returns a negative value upon error
-static int hts_template_formatv(hts_template_format_buf *buf, 
+static int hts_template_formatv(hts_template_format_buf *buf,
                                 const char *format, va_list args) {
 #undef FPUTC
 #undef FPUTS
-#define FPUTC(C) do { \
-  if (buf->fp != NULL) { \
-    assertf(buf->buffer == NULL); \
-    if (fputc(C, buf->fp) < 0) { \
-      return -1; \
-    } \
-  } else { \
-    assertf(buf->buffer != NULL); \
-    if (buf->offset + 1 < buf->size) { \
-      buf->buffer[buf->offset++] = (C); \
-    } else { \
-      return -1; \
-    } \
-  } \
-} while(0)
-#define FPUTS(S) do { \
-  size_t i; \
-  const char *const str_ = (S); \
-  assertf(str_ != NULL); \
-  for(i = 0 ; str_[i] != '\0' ; i++) { \
-    FPUTC(str_[i]); \
-  } \
-} while(0)
+#define FPUTC(C)                                                               \
+  do {                                                                         \
+    if (htsfmt_putc(buf, (C)) < 0)                                             \
+      return -1;                                                               \
+  } while (0)
+#define FPUTS(S)                                                               \
+  do {                                                                         \
+    if (htsfmt_puts(buf, (S)) < 0)                                             \
+      return -1;                                                               \
+  } while (0)
 
   if (buf != NULL && format != NULL) {
     const char *arg_expanded[32];
@@ -859,6 +872,74 @@ int hts_template_format_str(char *buffer, size_t size, const char *format, ...)
   return success;
 }
 
+// Value of the named field, or "" if absent (never NULL, so callers can pass it
+// straight to a formatter).
+static const char *footer_field_value(const hts_footer_field *fields,
+                                      size_t nfields, const char *name) {
+  size_t j;
+  for (j = 0; j < nfields; j++) {
+    if (strcmp(fields[j].name, name) == 0)
+      return fields[j].value != NULL ? fields[j].value : "";
+  }
+  return "";
+}
+
+int hts_footer_format(char *buffer, size_t size, const char *footer,
+                      const hts_footer_field *fields, size_t nfields) {
+  hts_template_format_buf buf = {NULL, buffer, size, 0};
+  size_t i;
+
+  if (footer == NULL || buffer == NULL || size == 0)
+    return -1;
+  // %s keeps the legacy positional model, byte-for-byte for existing -%F
+  // strings: addr, path, date, version, looked up by name and
+  // order-independent.
+  if (strstr(footer, "%s") != NULL)
+    return hts_template_format_str(
+        buffer, size, footer, footer_field_value(fields, nfields, "addr"),
+        footer_field_value(fields, nfields, "path"),
+        footer_field_value(fields, nfields, "date"),
+        footer_field_value(fields, nfields, "version"), /* EOF */ NULL);
+  // "{{"/"}}" emit a literal brace; an unknown "{...}" is left verbatim so
+  // typos stay visible.
+  for (i = 0; footer[i] != '\0'; i++) {
+    const char c = footer[i];
+    if (c == '{' && footer[i + 1] == '{') {
+      if (htsfmt_putc(&buf, '{') < 0)
+        return -1;
+      i++;
+    } else if (c == '}' && footer[i + 1] == '}') {
+      if (htsfmt_putc(&buf, '}') < 0)
+        return -1;
+      i++;
+    } else if (c == '{') {
+      const char *const end = strchr(footer + i + 1, '}');
+      int matched = 0;
+      if (end != NULL) {
+        const size_t namelen = (size_t) (end - (footer + i + 1));
+        size_t j;
+        for (j = 0; j < nfields; j++) {
+          if (strlen(fields[j].name) == namelen &&
+              strncmp(fields[j].name, footer + i + 1, namelen) == 0) {
+            if (htsfmt_puts(&buf,
+                            fields[j].value != NULL ? fields[j].value : "") < 0)
+              return -1;
+            i += namelen + 1; // consume the name and its closing '}'
+            matched = 1;
+            break;
+          }
+        }
+      }
+      if (!matched && htsfmt_putc(&buf, '{') < 0)
+        return -1;
+    } else if (htsfmt_putc(&buf, c) < 0) {
+      return -1;
+    }
+  }
+  buffer[buf.offset] = '\0';
+  return 1;
+}
+
 /* Note: NOT utf-8 */
 HTSEXT_API int hts_buildtopindex(httrackp * opt, const char *path,
                                  const char *binpath) {

src/htstools.h

@@ -73,6 +73,20 @@ HTS_INLINE int rech_tageq_all(const char *adr, const char *s);
 int hts_template_format(FILE *const out, const char *format, ...);
 int hts_template_format_str(char *buffer, size_t size, const char *format, ...);
 
+// A footer named field and its already-context-escaped value.
+typedef struct hts_footer_field {
+  const char *name;
+  const char *value;
+} hts_footer_field;
+
+// Expand a footer template. A "%s" in it selects the legacy positional model,
+// consuming the "addr"/"path"/"date"/"version" fields in that order; otherwise
+// "{name}" is substituted from fields by name ("{{"/"}}" emit a literal brace,
+// an unknown "{...}" is left verbatim). Values must already be escaped for the
+// target context by the caller. Returns <0 on overflow.
+int hts_footer_format(char *buffer, size_t size, const char *footer,
+                      const hts_footer_field *fields, size_t nfields);
+
 #define rech_tageq(adr,s) \
   ( \
     ( (*((adr)-1)=='<') || (is_space(*((adr)-1))) ) ? \

src/htswarc.c

@@ -0,0 +1,866 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+Copyright (C) 2026 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
+
+Please visit our Website: http://www.httrack.com
+*/
+
+/* ------------------------------------------------------------ */
+/* HTTrack WARC/1.1 output writer (ISO 28500). See warc.h.
+   Strategy B (see design): the response record stores the decoded body and a
+   normalized header block (Content-Encoding/Transfer-Encoding stripped,
+   Content-Length rewritten to the decoded length). Valid, replayable WARC. */
+/* ------------------------------------------------------------ */
+
+#define HTS_INTERNAL_BYTECODE
+
+#include "htswarc.h"
+
+#include "htscore.h"
+#include "htslib.h"
+#include "htstools.h"
+#include "htssafe.h"
+#include "htszlib.h"
+#include "coucal/coucal.h"
+
+#include <stdarg.h>
+#include <stdint.h>
+#include <time.h>
+
+#if HTS_USEOPENSSL
+#include <openssl/evp.h>
+#include <openssl/rand.h>
+#endif
+
+/* opt->state.warc value meaning "open failed once, do not retry". */
+#define WARC_DISABLED ((void *) ~(uintptr_t) 0)
+
+struct warc_writer {
+  FILE *f;
+  int gz;          /* 1: one gzip member per record; 0: raw */
+  uint64_t offset; /* running byte offset (member starts, for a future index) */
+  uint64_t counter; /* monotonic record counter */
+  uint64_t rng;     /* PRNG state for the UUID fallback */
+  char info_id[64]; /* warcinfo WARC-Record-ID, referenced by every record */
+  coucal seen;      /* base32 payload digest -> "uri\001date" (revisit dedup) */
+};
+
+/* ---- growable byte buffer (overflow-safe, project allocators) ---- */
+
+typedef struct {
+  char *data;
+  size_t len;
+  size_t cap;
+} wbuf;
+
+static void wbuf_free(wbuf *b) {
+  freet(b->data);
+  b->len = b->cap = 0;
+}
+
+/* Append n bytes; returns 0 on success, -1 on OOM/overflow. */
+static int wbuf_add(wbuf *b, const void *p, size_t n) {
+  if (n > (size_t) -1 - b->len)
+    return -1;
+  if (b->len + n > b->cap) {
+    size_t ncap = b->cap ? b->cap : 256;
+    char *nd;
+    while (ncap < b->len + n) {
+      if (ncap > (size_t) -1 / 2)
+        return -1;
+      ncap *= 2;
+    }
+    nd = realloct(b->data, ncap);
+    if (nd == NULL)
+      return -1;
+    b->data = nd;
+    b->cap = ncap;
+  }
+  memcpy(b->data + b->len, p, n);
+  b->len += n;
+  return 0;
+}
+
+static int wbuf_puts(wbuf *b, const char *s) {
+  return wbuf_add(b, s, strlen(s));
+}
+
+static int wbuf_printf(wbuf *b, const char *fmt, ...) HTS_PRINTF_FUN(2, 3);
+
+static int wbuf_printf(wbuf *b, const char *fmt, ...) {
+  char tmp[1024];
+  int n;
+  va_list ap;
+  va_start(ap, fmt);
+  n = vsnprintf(tmp, sizeof(tmp), fmt, ap);
+  va_end(ap);
+  if (n < 0 || (size_t) n >= sizeof(tmp))
+    return -1;
+  return wbuf_add(b, tmp, (size_t) n);
+}
+
+/* ---- gzip-per-record member writer (mirrors ae_write_packed) ---- */
+
+typedef struct {
+  warc_writer *w;
+  z_stream strm;
+  int active; /* deflate stream initialized */
+} member;
+
+static int member_begin(member *m, warc_writer *w) {
+  m->w = w;
+  m->active = 0;
+  if (w->gz) {
+    memset(&m->strm, 0, sizeof(m->strm));
+    /* windowBits=31 => full RFC1952 gzip member */
+    if (deflateInit2(&m->strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 31, 8,
+                     Z_DEFAULT_STRATEGY) != Z_OK)
+      return -1;
+    m->active = 1;
+  }
+  return 0;
+}
+
+static int member_write(member *m, const void *p, size_t n) {
+  if (!m->w->gz)
+    return (n == 0 || fwrite(p, 1, n, m->w->f) == n) ? 0 : -1;
+  m->strm.next_in = (const Bytef *) p;
+  while (n > 0) {
+    unsigned char out[8192];
+    size_t got;
+    uInt chunk = (n > (uInt) -1) ? (uInt) -1 : (uInt) n;
+    m->strm.avail_in = chunk;
+    do {
+      m->strm.next_out = out;
+      m->strm.avail_out = sizeof(out);
+      if (deflate(&m->strm, Z_NO_FLUSH) != Z_OK)
+        return -1;
+      got = sizeof(out) - m->strm.avail_out;
+      if (got > 0 && fwrite(out, 1, got, m->w->f) != got)
+        return -1;
+    } while (m->strm.avail_out == 0);
+    n -= chunk;
+  }
+  return 0;
+}
+
+static int member_end(member *m) {
+  int rc = 0;
+  if (m->active) {
+    unsigned char out[8192];
+    int zerr;
+    m->strm.avail_in = 0;
+    do {
+      m->strm.next_out = out;
+      m->strm.avail_out = sizeof(out);
+      zerr = deflate(&m->strm, Z_FINISH);
+      {
+        size_t got = sizeof(out) - m->strm.avail_out;
+        if (got > 0 && fwrite(out, 1, got, m->w->f) != got)
+          rc = -1;
+      }
+    } while (zerr == Z_OK);
+    if (zerr != Z_STREAM_END)
+      rc = -1;
+    deflateEnd(&m->strm);
+    m->active = 0;
+  }
+  return rc;
+}
+
+/* ---- SHA-1 + Base32 (digests are OpenSSL-only; omitted otherwise) ---- */
+
+#if HTS_USEOPENSSL
+/* Streaming SHA-1 over the block (all regions) and the payload (body only). */
+typedef struct {
+  EVP_MD_CTX *block;
+  EVP_MD_CTX *payload;
+} digester;
+
+static void base32_20(const unsigned char in[20], char out[33]) {
+  static const char a[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
+  int i, o = 0;
+  uint64_t buf = 0;
+  int bits = 0;
+  for (i = 0; i < 20; i++) {
+    buf = (buf << 8) | in[i];
+    bits += 8;
+    while (bits >= 5) {
+      bits -= 5;
+      out[o++] = a[(buf >> bits) & 0x1F];
+    }
+  }
+  out[o] = '\0'; /* 20 bytes => exactly 32 base32 chars, no padding */
+}
+#endif
+
+/* Stream a block to a sink. When http_section, the HTTP header bytes (may be
+   empty) plus their terminating CRLF are emitted first; the separator is bound
+   to http_section, not to http_hdr being non-NULL, so an empty header still
+   emits (and is counted in) the 2-byte separator (F3). The on-disk body is
+   written as EXACTLY body_len octets — capped if the file grew, zero-padded if
+   it shrank — so the declared Content-Length always equals the bytes written
+   across every pass (F2). region 0=header, 1=body. Returns 0 on success. */
+typedef int (*warc_sink)(void *ctx, int region, const void *p, size_t n);
+
+static int stream_body_pad(warc_sink sink, void *ctx, size_t remaining) {
+  static const char zeros[4096] = {0};
+  while (remaining > 0) {
+    size_t chunk = (remaining < sizeof(zeros)) ? remaining : sizeof(zeros);
+    if (sink(ctx, 1, zeros, chunk) != 0)
+      return -1;
+    remaining -= chunk;
+  }
+  return 0;
+}
+
+static int stream_block(int http_section, const char *http_hdr,
+                        size_t http_hdr_len, int has_body, const char *body,
+                        size_t body_len, const char *body_path, warc_sink sink,
+                        void *ctx) {
+  if (http_section) {
+    if (http_hdr != NULL && http_hdr_len > 0 &&
+        sink(ctx, 0, http_hdr, http_hdr_len) != 0)
+      return -1;
+    if (sink(ctx, 0, "\r\n", 2) != 0)
+      return -1;
+  }
+  if (has_body) {
+    if (body != NULL) {
+      if (body_len > 0 && sink(ctx, 1, body, body_len) != 0)
+        return -1;
+    } else if (body_path != NULL) {
+      char catbuff[CATBUFF_SIZE];
+      size_t remaining = body_len;
+      FILE *fp = FOPEN(fconv(catbuff, sizeof(catbuff), body_path), "rb");
+      if (fp == NULL)
+        return -1;
+      while (remaining > 0) {
+        char b[32768];
+        size_t want = (remaining < sizeof(b)) ? remaining : sizeof(b);
+        size_t nl = fread(b, 1, want, fp);
+        if (nl == 0)
+          break; /* short file: pad below so written == declared */
+        if (sink(ctx, 1, b, nl) != 0) {
+          fclose(fp);
+          return -1;
+        }
+        remaining -= nl;
+      }
+      fclose(fp);
+      if (stream_body_pad(sink, ctx, remaining) != 0)
+        return -1;
+    }
+  }
+  return 0;
+}
+
+#if HTS_USEOPENSSL
+static int digest_sink(void *ctx, int region, const void *p, size_t n) {
+  digester *d = (digester *) ctx;
+  if (d->block != NULL && EVP_DigestUpdate(d->block, p, n) != 1)
+    return -1;
+  if (region == 1 && d->payload != NULL &&
+      EVP_DigestUpdate(d->payload, p, n) != 1)
+    return -1;
+  return 0;
+}
+#endif
+
+static int write_sink(void *ctx, int region, const void *p, size_t n) {
+  (void) region;
+  return member_write((member *) ctx, p, n);
+}
+
+/* Base32 SHA-1 of a transaction payload (body only), for revisit dedup.
+   Returns 1 and fills out[33] on success, 0 without OpenSSL or on error. */
+static int payload_digest_b32(const char *body, size_t body_len,
+                              const char *body_path, char out[33]) {
+#if HTS_USEOPENSSL
+  digester d;
+  unsigned char md[EVP_MAX_MD_SIZE];
+  unsigned int mdlen = 0;
+  int ok;
+  d.block = NULL;
+  d.payload = EVP_MD_CTX_new();
+  if (d.payload == NULL)
+    return 0;
+  if (EVP_DigestInit_ex(d.payload, EVP_sha1(), NULL) != 1) {
+    EVP_MD_CTX_free(d.payload);
+    return 0;
+  }
+  ok = stream_block(0, NULL, 0, 1, body, body_len, body_path, digest_sink,
+                    &d) == 0 &&
+       EVP_DigestFinal_ex(d.payload, md, &mdlen) == 1 && mdlen == 20;
+  EVP_MD_CTX_free(d.payload);
+  if (!ok)
+    return 0;
+  base32_20(md, out);
+  return 1;
+#else
+  (void) body;
+  (void) body_len;
+  (void) body_path;
+  (void) out;
+  return 0;
+#endif
+}
+
+/* ---- misc record helpers ---- */
+
+static void warc_fill_random(warc_writer *w, unsigned char *b, size_t n) {
+  size_t i;
+#if HTS_USEOPENSSL
+  if (n <= (size_t) 0x7fffffff && RAND_bytes(b, (int) n) == 1)
+    return;
+#endif
+  for (i = 0; i < n; i++) {
+    w->rng ^= w->rng << 13;
+    w->rng ^= w->rng >> 7;
+    w->rng ^= w->rng << 17;
+    b[i] = (unsigned char) (w->rng >> 24);
+  }
+}
+
+/* urn:uuid: v4-shaped record id (uniqueness within the run is what matters). */
+static void warc_make_id(warc_writer *w, char out[64]) {
+  unsigned char b[16];
+  w->counter++;
+  warc_fill_random(w, b, sizeof(b));
+  b[6] = (unsigned char) ((b[6] & 0x0F) | 0x40);
+  b[8] = (unsigned char) ((b[8] & 0x3F) | 0x80);
+  snprintf(out, 64,
+           "<urn:uuid:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-"
+           "%02x%02x%02x%02x%02x%02x>",
+           b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8], b[9], b[10],
+           b[11], b[12], b[13], b[14], b[15]);
+}
+
+static void warc_now_iso8601(char out[32]) {
+  time_t t = time(NULL);
+  struct tm tmv;
+#if defined(_WIN32)
+  struct tm *g = gmtime(&t);
+  if (g != NULL)
+    tmv = *g;
+  else
+    memset(&tmv, 0, sizeof(tmv));
+#else
+  if (gmtime_r(&t, &tmv) == NULL)
+    memset(&tmv, 0, sizeof(tmv));
+#endif
+  strftime(out, 32, "%Y-%m-%dT%H:%M:%SZ", &tmv);
+}
+
+/* Case-insensitive "does line start with name:" test. */
+static int header_is(const char *line, size_t line_len, const char *name) {
+  size_t nl = strlen(name);
+  if (line_len < nl + 1)
+    return 0;
+  if (strncasecmp(line, name, nl) != 0)
+    return 0;
+  return line[nl] == ':';
+}
+
+/* Build the normalized HTTP header block from raw resp_hdr into out (no
+   trailing CRLF terminator). Always drops Transfer-Encoding (hop-by-hop).
+   When set_cl>=0, also drops Content-Encoding and the original Content-Length
+   and appends "Content-Length: <set_cl>". Returns 0 on success. */
+static int normalize_http_headers(const char *resp_hdr, long long set_cl,
+                                  wbuf *out) {
+  const char *p = resp_hdr;
+  int first = 1;
+  if (resp_hdr == NULL)
+    return -1;
+  while (*p != '\0') {
+    const char *eol = strchr(p, '\n');
+    size_t len = (eol != NULL) ? (size_t) (eol - p) : strlen(p);
+    size_t raw = len;
+    if (len > 0 && p[len - 1] == '\r')
+      len--; /* strip CR; re-added as CRLF below */
+    if (len == 0)
+      break; /* blank line: end of headers */
+    if (first) {
+      first = 0; /* status line: keep verbatim */
+    } else if (header_is(p, len, "Transfer-Encoding")) {
+      goto next;
+    } else if (set_cl >= 0 && (header_is(p, len, "Content-Encoding") ||
+                               header_is(p, len, "Content-Length"))) {
+      goto next;
+    }
+    if (wbuf_add(out, p, len) != 0 || wbuf_add(out, "\r\n", 2) != 0)
+      return -1;
+  next:
+    if (eol == NULL)
+      break;
+    p = eol + 1;
+    (void) raw;
+  }
+  if (set_cl >= 0 && wbuf_printf(out, "Content-Length: %lld\r\n", set_cl) != 0)
+    return -1;
+  return 0;
+}
+
+/* Emit one full WARC record. When http_section, the block carries an HTTP
+   header block (http_hdr, possibly empty) + a CRLF separator; body follows when
+   has_body. block_len is derived here (single source of truth: separator and
+   payload are counted exactly as stream_block emits them), so a declared
+   Content-Length can never desync from the written bytes. The payload digest
+   (body-only) is passed in when already known. On success the record id is
+   copied to out_id (may be NULL). */
+static int warc_emit(warc_writer *w, const char *type, const char *content_type,
+                     const char *target_uri, const char *ip,
+                     const char *concurrent_to, const char *refers_uri,
+                     const char *refers_date, const char *profile,
+                     const char *payload_digest, int http_section,
+                     const char *http_hdr, size_t http_hdr_len, int has_body,
+                     const char *body, size_t body_len, const char *body_path,
+                     char out_id[64]) {
+  wbuf hdr;
+  member m;
+  char id[64], date[32];
+  size_t sep = http_section ? 2 : 0;
+  size_t payload = has_body ? body_len : 0;
+  size_t block_len;
+  int rc = -1;
+#if HTS_USEOPENSSL
+  digester d;
+  unsigned char md[EVP_MAX_MD_SIZE];
+  unsigned int mdlen = 0;
+  char block_b32[33];
+  int have_block_digest = 0;
+#endif
+
+  /* F4: overflow-safe block length; http_hdr_len+sep is provably small. */
+  if (payload > (size_t) -1 - http_hdr_len - sep)
+    return -1;
+  block_len = http_hdr_len + sep + payload;
+
+  memset(&hdr, 0, sizeof(hdr));
+  warc_make_id(w, id);
+  warc_now_iso8601(date);
+
+#if HTS_USEOPENSSL
+  /* Block digest over the whole block, in one streaming pass. */
+  d.block = EVP_MD_CTX_new();
+  d.payload = NULL;
+  if (d.block != NULL && EVP_DigestInit_ex(d.block, EVP_sha1(), NULL) == 1 &&
+      stream_block(http_section, http_hdr, http_hdr_len, has_body, body,
+                   body_len, body_path, digest_sink, &d) == 0 &&
+      EVP_DigestFinal_ex(d.block, md, &mdlen) == 1 && mdlen == 20) {
+    base32_20(md, block_b32);
+    have_block_digest = 1;
+  }
+  if (d.block != NULL)
+    EVP_MD_CTX_free(d.block);
+#endif
+
+  if (wbuf_puts(&hdr, "WARC/1.1\r\n") != 0 ||
+      wbuf_printf(&hdr, "WARC-Type: %s\r\n", type) != 0 ||
+      wbuf_printf(&hdr, "WARC-Record-ID: %s\r\n", id) != 0 ||
+      wbuf_printf(&hdr, "WARC-Date: %s\r\n", date) != 0)
+    goto done;
+  if (content_type != NULL &&
+      wbuf_printf(&hdr, "Content-Type: %s\r\n", content_type) != 0)
+    goto done;
+  if (wbuf_printf(&hdr, "Content-Length: %llu\r\n",
+                  (unsigned long long) block_len) != 0)
+    goto done;
+  if (w->info_id[0] != '\0' && strcmp(type, "warcinfo") != 0 &&
+      wbuf_printf(&hdr, "WARC-Warcinfo-ID: %s\r\n", w->info_id) != 0)
+    goto done;
+  if (target_uri != NULL && target_uri[0] != '\0' &&
+      wbuf_printf(&hdr, "WARC-Target-URI: %s\r\n", target_uri) != 0)
+    goto done;
+  if (ip != NULL && ip[0] != '\0' &&
+      wbuf_printf(&hdr, "WARC-IP-Address: %s\r\n", ip) != 0)
+    goto done;
+  if (concurrent_to != NULL && concurrent_to[0] != '\0' &&
+      wbuf_printf(&hdr, "WARC-Concurrent-To: %s\r\n", concurrent_to) != 0)
+    goto done;
+  if (profile != NULL &&
+      wbuf_printf(&hdr, "WARC-Profile: %s\r\n", profile) != 0)
+    goto done;
+  if (refers_uri != NULL && refers_uri[0] != '\0' &&
+      wbuf_printf(&hdr, "WARC-Refers-To-Target-URI: %s\r\n", refers_uri) != 0)
+    goto done;
+  if (refers_date != NULL && refers_date[0] != '\0' &&
+      wbuf_printf(&hdr, "WARC-Refers-To-Date: %s\r\n", refers_date) != 0)
+    goto done;
+#if HTS_USEOPENSSL
+  if (have_block_digest &&
+      wbuf_printf(&hdr, "WARC-Block-Digest: sha1:%s\r\n", block_b32) != 0)
+    goto done;
+#endif
+  if (payload_digest != NULL && payload_digest[0] != '\0' &&
+      wbuf_printf(&hdr, "WARC-Payload-Digest: sha1:%s\r\n", payload_digest) !=
+          0)
+    goto done;
+  if (wbuf_puts(&hdr, "\r\n") != 0)
+    goto done;
+
+  if (member_begin(&m, w) != 0)
+    goto done;
+  if (member_write(&m, hdr.data, hdr.len) != 0 ||
+      stream_block(http_section, http_hdr, http_hdr_len, has_body, body,
+                   body_len, body_path, write_sink, &m) != 0 ||
+      member_write(&m, "\r\n\r\n", 4) != 0) {
+    member_end(&m);
+    goto done;
+  }
+  if (member_end(&m) != 0)
+    goto done;
+
+  {
+    long pos = ftell(w->f);
+    if (pos >= 0)
+      w->offset = (uint64_t) pos;
+  }
+  if (out_id != NULL)
+    strlcpybuff(out_id, id, 64);
+  rc = 0;
+done:
+  wbuf_free(&hdr);
+  return rc;
+}
+
+/* ---- request stash (engine hooks) ---- */
+
+void warc_stash_request(htsblk *r, const char *reqhdr) {
+  if (r == NULL)
+    return;
+  freet(r->warc_reqhdr);
+  if (reqhdr != NULL)
+    r->warc_reqhdr = strdupt(reqhdr);
+}
+
+void warc_stash_response(htsblk *r, const char *resphdr) {
+  if (r == NULL)
+    return;
+  freet(r->warc_resphdr);
+  if (resphdr != NULL)
+    r->warc_resphdr = strdupt(resphdr);
+}
+
+void warc_free_request(htsblk *r) {
+  if (r != NULL) {
+    freet(r->warc_reqhdr);
+    freet(r->warc_resphdr);
+  }
+}
+
+/* ---- open / close ---- */
+
+warc_writer *warc_open(httrackp *opt, const char *path) {
+  warc_writer *w;
+  char namebuf[HTS_URLMAXSIZE * 2];
+  char catbuff[CATBUFF_SIZE];
+  wbuf info;
+  const char *robots;
+  size_t plen;
+
+  if (path == NULL)
+    return NULL;
+
+  /* --warc with no name: <output>/httrack-<timestamp>.warc.gz */
+  if (strcmp(path, WARC_AUTONAME) == 0) {
+    char ts[32];
+    time_t t = time(NULL);
+    struct tm tmv;
+#if defined(_WIN32)
+    struct tm *g = gmtime(&t);
+    if (g != NULL)
+      tmv = *g;
+    else
+      memset(&tmv, 0, sizeof(tmv));
+#else
+    if (gmtime_r(&t, &tmv) == NULL)
+      memset(&tmv, 0, sizeof(tmv));
+#endif
+    strftime(ts, sizeof(ts), "%Y%m%d%H%M%S", &tmv);
+    snprintf(catbuff, sizeof(catbuff), "httrack-%s.warc.gz", ts);
+    path =
+        fconcat(namebuf, sizeof(namebuf), StringBuff(opt->path_html), catbuff);
+  } else {
+    /* --warc-file NAME: append .warc.gz unless already a .warc/.warc.gz name;
+       place bare basenames under the output directory (like the auto name). */
+    size_t l = strlen(path);
+    int has_warc = (l >= 5 && strcasecmp(path + l - 5, ".warc") == 0);
+    int has_gz = (l >= 3 && strcasecmp(path + l - 3, ".gz") == 0);
+    char named[HTS_URLMAXSIZE];
+    if (has_warc || has_gz)
+      strlcpybuff(named, path, sizeof(named));
+    else
+      snprintf(named, sizeof(named), "%s.warc.gz", path);
+    if (strchr(named, '/') == NULL && strchr(named, '\\') == NULL) {
+      path =
+          fconcat(namebuf, sizeof(namebuf), StringBuff(opt->path_html), named);
+    } else {
+      strlcpybuff(namebuf, named, sizeof(namebuf));
+      path = namebuf;
+    }
+  }
+
+  w = calloct(1, sizeof(*w));
+  if (w == NULL)
+    return NULL;
+  plen = strlen(path);
+  w->gz = (plen >= 3 && strcasecmp(path + plen - 3, ".gz") == 0);
+  w->rng = (uint64_t) time(NULL) ^ ((uint64_t) (uintptr_t) w << 16) ^
+           0x9e3779b97f4a7c15ULL;
+  w->seen = coucal_new(0);
+  if (w->seen != NULL)
+    coucal_value_is_malloc(w->seen, 1);
+
+  w->f = FOPEN(fconv(catbuff, sizeof(catbuff), path), "wb");
+  if (w->f == NULL) {
+    if (w->seen != NULL)
+      coucal_delete(&w->seen);
+    freet(w);
+    return NULL;
+  }
+
+  robots = (opt->robots == HTS_ROBOTS_NEVER) ? "ignore" : "obey";
+  memset(&info, 0, sizeof(info));
+  if (wbuf_printf(&info,
+                  "software: HTTrack/%s (+https://www.httrack.com/)\r\n"
+                  "format: WARC file version 1.1\r\n"
+                  "conformsTo: http://iipc.github.io/warc-specifications/"
+                  "specifications/warc-format/warc-1.1/\r\n"
+                  "robots: %s\r\n",
+                  HTTRACK_VERSION, robots) != 0 ||
+      (StringNotEmpty(opt->path_html) &&
+       wbuf_printf(&info, "isPartOf: %s\r\n", StringBuff(opt->path_html)) !=
+           0)) {
+    wbuf_free(&info);
+    warc_close(w);
+    return NULL;
+  }
+  w->info_id[0] = '\0'; /* not yet known: warcinfo omits WARC-Warcinfo-ID */
+  if (warc_emit(w, "warcinfo", "application/warc-fields", NULL, NULL, NULL,
+                NULL, NULL, NULL, NULL, 0, NULL, 0, 1, info.data, info.len,
+                NULL, w->info_id) != 0) {
+    wbuf_free(&info);
+    warc_close(w);
+    return NULL;
+  }
+  wbuf_free(&info);
+  return w;
+}
+
+void warc_close(warc_writer *w) {
+  if (w == NULL)
+    return;
+  if (w->f != NULL)
+    fclose(w->f);
+  if (w->seen != NULL)
+    coucal_delete(&w->seen);
+  freet(w);
+}
+
+void warc_close_opt(httrackp *opt) {
+  if (opt->state.warc != NULL && opt->state.warc != WARC_DISABLED) {
+    warc_close((warc_writer *) opt->state.warc);
+  }
+  opt->state.warc = NULL;
+}
+
+/* ---- one transaction ---- */
+
+int warc_write_transaction(warc_writer *w, const char *target_uri,
+                           const char *ip, const char *req_hdr,
+                           const char *resp_hdr, const char *body,
+                           size_t body_len, const char *body_path,
+                           int statuscode, int is_update_unchanged) {
+  wbuf http;
+  char resp_id[64];
+  char pdig[33];
+  int have_pdig;
+  int is_revisit = 0;
+  const char *profile = NULL;
+  const char *refers_uri = NULL;
+  const char *refers_date = NULL;
+  char refers_buf[HTS_URLMAXSIZE * 2 + 64];
+  int has_payload;
+  int emit_body;
+  int rc = -1;
+
+  if (resp_hdr == NULL)
+    return -1;
+
+  /* A payload exists (for digesting) unless this is a bodyless 304. */
+  has_payload = (body_len > 0 && (body != NULL || body_path != NULL) &&
+                 !is_update_unchanged);
+
+  /* Payload digest drives identical-payload-digest dedup (OpenSSL only). */
+  have_pdig =
+      has_payload ? payload_digest_b32(body, body_len, body_path, pdig) : 0;
+
+  if (is_update_unchanged) {
+    is_revisit = 1;
+    profile = "http://netpreserve.org/warc/1.1/revisit/server-not-modified";
+  } else if (have_pdig && w->seen != NULL) {
+    void *prev = NULL;
+    if (coucal_read_pvoid(w->seen, pdig, &prev) && prev != NULL) {
+      char *slot = (char *) prev;
+      char *sep = strchr(slot, '\001');
+      is_revisit = 1;
+      profile =
+          "http://netpreserve.org/warc/1.1/revisit/identical-payload-digest";
+      if (sep != NULL) {
+        size_t n = (size_t) (sep - slot);
+        if (n < sizeof(refers_buf)) {
+          memcpy(refers_buf, slot, n);
+          refers_buf[n] = '\0';
+          refers_uri = refers_buf;
+          refers_date = sep + 1;
+        }
+      }
+    }
+  }
+
+  /* Both revisit kinds (server-304 and identical-payload-digest) are bodyless;
+     only a full response carries the payload (F1). */
+  emit_body = has_payload && !is_revisit;
+
+  /* Normalize headers: full response rewrites Content-Length to the decoded
+     body length and strips Content-Encoding; a revisit keeps them (no body). */
+  memset(&http, 0, sizeof(http));
+  if (normalize_http_headers(resp_hdr, emit_body ? (long long) body_len : -1,
+                             &http) != 0) {
+    wbuf_free(&http);
+    return -1;
+  }
+
+  /* Response first: its id links the request via WARC-Concurrent-To. */
+  resp_id[0] = '\0';
+  if (warc_emit(w, is_revisit ? "revisit" : "response",
+                "application/http;msgtype=response", target_uri, ip, NULL,
+                refers_uri, refers_date, profile, have_pdig ? pdig : NULL, 1,
+                http.data, http.len, emit_body, body, body_len, body_path,
+                resp_id) != 0) {
+    wbuf_free(&http);
+    return -1;
+  }
+  wbuf_free(&http);
+
+  if (req_hdr != NULL && req_hdr[0] != '\0') {
+    size_t rlen = strlen(req_hdr);
+    if (warc_emit(w, "request", "application/http;msgtype=request", target_uri,
+                  NULL, resp_id, NULL, NULL, NULL, NULL, 0, NULL, 0, 1, req_hdr,
+                  rlen, NULL, NULL) != 0)
+      return -1;
+  }
+
+  /* Record this payload for later identical-payload-digest revisits. */
+  if (!is_revisit && have_pdig && w->seen != NULL && target_uri != NULL) {
+    char date[32];
+    char *slot;
+    size_t need;
+    warc_now_iso8601(date);
+    need = strlen(target_uri) + 1 + strlen(date) + 1;
+    slot = malloct(need);
+    if (slot != NULL) {
+      snprintf(slot, need, "%s\001%s", target_uri, date);
+      if (coucal_write_pvoid(w->seen, pdig, slot) == 0) {
+        /* replaced an existing entry: coucal freed the old value */
+      }
+    }
+  }
+
+  (void) statuscode;
+  rc = 0;
+  return rc;
+}
+
+/* ---- engine emit hook ---- */
+
+void warc_write_backtransaction(httrackp *opt, lien_back *back) {
+  warc_writer *w;
+  char uri[HTS_URLMAXSIZE * 4 + 16];
+  char ip[128];
+  const char *body;
+  size_t body_len;
+  const char *body_path;
+  const char *resp_hdr;
+  char synth[512];
+  int is_unchanged;
+
+  if (opt->state.warc == WARC_DISABLED)
+    return;
+  if (opt->state.warc == NULL) {
+    w = warc_open(opt, StringBuff(opt->warc_file));
+    if (w == NULL) {
+      opt->state.warc = WARC_DISABLED;
+      hts_log_print(opt, LOG_ERROR, "could not create WARC archive %s",
+                    StringBuff(opt->warc_file));
+      return;
+    }
+    opt->state.warc = w;
+  }
+  w = (warc_writer *) opt->state.warc;
+
+  if (back->r.statuscode <= 0)
+    return;
+
+  snprintf(uri, sizeof(uri), "%s%s%s",
+           link_has_authority(back->url_adr) ? "" : "http://", back->url_adr,
+           back->url_fil);
+
+  ip[0] = '\0';
+  SOCaddr_inetntoa(ip, sizeof(ip), back->r.address);
+
+  if (!back->r.is_write) {
+    body = back->r.adr;
+    body_len = (back->r.size > 0) ? (size_t) back->r.size : 0;
+    body_path = NULL;
+  } else {
+    LLint fs;
+    body = NULL;
+    body_path = back->url_sav;
+    fs = fsize_utf8(body_path);
+    /* F4: an on-disk body past size_t (LLP32/ILP32, >4GB) would wrap the length
+       used as Content-Length; drop the body rather than desync the record. */
+    if (fs > 0 && (uint64_t) fs <= (uint64_t) (size_t) -1)
+      body_len = (size_t) fs;
+    else
+      body_len = 0;
+  }
+
+  is_unchanged = (back->r.notmodified && opt->is_update) ? 1 : 0;
+
+  /* Prefer the stashed raw headers; synthesize a minimal status line for the
+     header-less (HTTP/0.9-style) responses that never carried a header block.
+   */
+  resp_hdr = back->r.warc_resphdr;
+  if (resp_hdr == NULL) {
+    snprintf(synth, sizeof(synth), "HTTP/1.1 %d %s\r\nContent-Type: %s\r\n\r\n",
+             back->r.statuscode, back->r.msg[0] ? back->r.msg : "OK",
+             back->r.contenttype[0] ? back->r.contenttype
+                                    : "application/octet-stream");
+    resp_hdr = synth;
+  }
+
+  warc_write_transaction(w, uri, ip, back->r.warc_reqhdr, resp_hdr, body,
+                         body_len, body_path, back->r.statuscode, is_unchanged);
+}

src/htswarc.h

@@ -0,0 +1,98 @@
+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+Copyright (C) 2026 Xavier Roche and other contributors
+
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Ethical use: we kindly ask that you NOT use this software to harvest email
+addresses or to collect any other private information about people. Doing so
+would dishonor our work and waste the many hours we have spent on it.
+
+Please visit our Website: http://www.httrack.com
+*/
+
+/* ------------------------------------------------------------ */
+/* HTTrack WARC/1.1 output writer (ISO 28500). Internal, not installed.
+   All WARC record serialization, gzip-member framing, digests, UUID and
+   revisit dedup live here; the engine only stashes the request, frees it,
+   and calls one entry point per finished transaction. */
+/* ------------------------------------------------------------ */
+
+#ifndef HTS_WARC_DEFH
+#define HTS_WARC_DEFH
+
+#include "htsopt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* opt->warc_file sentinel: --warc with no argument => auto-name the archive
+   under the project's output directory at open time. */
+#define WARC_AUTONAME "\001auto"
+
+typedef struct warc_writer warc_writer;
+
+/* Stash the raw request header block (bstr.buffer) on r for the later WARC
+   request record; frees any prior stash. No-op when reqhdr is NULL. */
+void warc_stash_request(htsblk *r, const char *reqhdr);
+
+/* Stash the raw response header block: deletehttp frees r.headers when the
+   socket closes, before back_finalize, so keep a WARC-owned copy. */
+void warc_stash_response(htsblk *r, const char *resphdr);
+
+/* Free both stashed header blocks (idempotent, NULL-safe). */
+void warc_free_request(htsblk *r);
+
+/* Emit the request + response (or revisit) records for one finished
+   transaction. Lazily opens the writer into opt->state.warc; a no-op (logged
+   once) if the archive cannot be created. */
+void warc_write_backtransaction(httrackp *opt, lien_back *back);
+
+/* Close and free the writer held in opt->state.warc, if any. */
+void warc_close_opt(httrackp *opt);
+
+/* --- Direct writer API (used by the hooks above and the self-test). --- */
+
+/* Create the archive at path (auto-named when path is WARC_AUTONAME), writing
+   the warcinfo record. .warc.gz => one gzip member per record; .warc => raw.
+   Returns NULL on failure. */
+warc_writer *warc_open(httrackp *opt, const char *path);
+
+/* Flush, close and free the writer (NULL-safe). */
+void warc_close(warc_writer *w);
+
+/* Write one transaction's request + response (or revisit) records.
+   target_uri:  absolute URL fetched.
+   ip:          numeric peer IP, or NULL/"" to omit.
+   req_hdr:     exact request header block sent, or NULL to skip the request.
+   resp_hdr:    raw received response header block (status line + headers).
+   body/body_len: decoded in-memory body, or NULL when on disk.
+   body_path:   file re-read for the body when body==NULL (may be NULL).
+   is_update_unchanged: nonzero for a 304 server-not-modified revisit.
+   Returns 0 on success, -1 on error. */
+int warc_write_transaction(warc_writer *w, const char *target_uri,
+                           const char *ip, const char *req_hdr,
+                           const char *resp_hdr, const char *body,
+                           size_t body_len, const char *body_path,
+                           int statuscode, int is_update_unchanged);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/libhttrack.vcxproj

@@ -135,6 +135,7 @@
     <ClCompile Include="htswizard.c" />
     <ClCompile Include="htswrap.c" />
     <ClCompile Include="htszlib.c" />
+    <ClCompile Include="htswarc.c" />
     <ClCompile Include="md5.c" />
     <ClCompile Include="minizip\ioapi.c" />
     <ClCompile Include="minizip\iowin32.c" />

tests/01_engine-footer-overflow.test

@@ -0,0 +1,56 @@
+#!/bin/bash
+#
+# Keep this POSIX-portable: the harness runs it via $(BASH), which is a plain
+# POSIX /bin/sh on some platforms (e.g. macOS), so avoid bashisms despite the
+# #!/bin/bash above.
+
+# A -%F footer whose expansion overflows the on-page buffer must be dropped, not
+# crash the crawl. Before the fix the unchecked hts_footer_format return left the
+# buffer unterminated and the next strcatbuff aborted (SIGABRT).
+
+set -eu
+
+# The overflow needs a path longer than Windows MAX_PATH (260), so both the
+# source tree and the mirror output blow past it there; run on POSIX only. The
+# fix itself is platform-independent and covered on Linux/macOS.
+case "$(uname -s 2>/dev/null)" in
+MINGW* | MSYS* | CYGWIN*) exit 77 ;;
+esac
+
+dir=$(mktemp -d)
+trap 'rm -rf "$dir"' EXIT
+
+# A few-hundred-char file path (kept well under the URL length limit) makes the
+# {path} field long.
+seg=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+deep="$dir"
+i=0
+while [ "$i" -lt 6 ]; do
+    deep="$deep/$seg"
+    i=$((i + 1))
+done
+mkdir -p "$deep"
+printf '<html><body>hi</body></html>' >"$deep/index.html"
+
+# 40 {path} references (~240 chars, under the 254-char -%F cap); expanded against
+# a few-hundred-char path this far exceeds the per-page footer buffer.
+footer=""
+i=0
+while [ "$i" -lt 40 ]; do
+    footer="$footer{path}"
+    i=$((i + 1))
+done
+
+mir="$dir/mir"
+httrack "file://$deep/index.html" -O "$mir" -%F "$footer" -q -s0 -%v0 \
+    >/dev/null 2>&1 || {
+    echo "crawl failed/aborted (exit $?) on an oversized footer" >&2
+    exit 1
+}
+
+# The crawled page must exist (proves the URL wasn't rejected for length, so the
+# footer path ran). Look under file/, not $mir, to skip the makeindex top index.
+find "$mir/file" -name index.html | grep -q . || {
+    echo "page not mirrored; the oversized-footer path was not exercised" >&2
+    exit 1
+}

tests/01_engine-footerfmt.test

@@ -0,0 +1,42 @@
+#!/bin/bash
+#
+
+set -euo pipefail
+
+# -%F footer expansion (hts_footer_format via -#test=footerfmt). Fixed fields:
+# addr=host.example path=/dir/page.html date=DATE version=VER.
+ftr() {
+    out="$(httrack -O /dev/null -#test=footerfmt "$1")"
+    test "$out" == "$2" || {
+        echo "FAIL: '$1' -> '$out' (want '$2')"
+        exit 1
+    }
+}
+
+# Legacy positional model: a template with %s keeps the historic addr/path/date
+# order byte-for-byte (backward compatibility).
+ftr '<!-- Mirrored from %s%s by X, %s -->' \
+    '<!-- Mirrored from host.example/dir/page.html by X, DATE -->'
+# Legacy arg overflow past the four fields yields the historic "???" marker.
+ftr 'a %s b %s c %s d %s e %s' 'a host.example b /dir/page.html c DATE d VER e ???'
+# Legacy %% is a literal percent; an unknown %x passes through verbatim.
+ftr '100%% %d %s' '100% %d host.example'
+
+# Named model (no %s): fields substitute by name, in any order or subset.
+ftr '{addr}{path} {version} {date}' 'host.example/dir/page.html VER DATE'
+ftr 'built {date}' 'built DATE'
+# A literal char abutting a field's '}' survives (guards the index advance).
+ftr '{date}!{addr}' 'DATE!host.example'
+# {{ and }} escape to a literal brace.
+ftr 'a {{ b }} {addr}' 'a { b } host.example'
+# Unknown, empty, or unterminated braces are emitted verbatim (typos stay visible).
+ftr '{bogus} {} {addr' '{bogus} {} {addr'
+# A literal percent is untouched in named mode (no positional interpretation).
+ftr '100% {path}' '100% /dir/page.html'
+# %s anywhere forces legacy mode, so a mixed template leaves {addr} literal.
+ftr '{addr} %s' '{addr} host.example'
+
+# The added named fields (url, lastmodified, mime, charset, status, size).
+ftr '{url}' 'http://host.example/dir/page.html'
+ftr 'src {lastmodified}, got {date}' 'src LASTMOD, got DATE'
+ftr '{mime}; {charset}; {status}; {size}' 'text/html; utf-8; 200; 1234'

tests/01_zlib-warc.test

@@ -0,0 +1,19 @@
+#!/bin/bash
+#
+
+set -euo pipefail
+
+# WARC/1.1 writer self-test: framing, Content-Length, gzip members, round-trip,
+# and identical-payload-digest revisit dedup, over synthetic transactions.
+
+httrack_bin=$(cd "$(dirname "$(command -v httrack)")" && pwd)/httrack
+
+scratch=$(mktemp -d)
+trap 'rm -rf "$scratch"' EXIT
+
+out=$("$httrack_bin" -O /dev/null -#test=warc "$scratch/")
+echo "$out"
+case "$out" in
+*": OK") ;;
+*) exit 1 ;;
+esac

tests/73_local-warc.test

@@ -0,0 +1,21 @@
+#!/bin/bash
+#
+# A --warc crawl writes a standards-conformant WARC/1.1 archive, and an
+# --update re-crawl of an unchanged (all-304) site emits revisit records.
+# The stdlib validator (no warcio) is the real gate: it byte-compares the
+# fresh page.html response body against what the server served, asserts the
+# encoding headers were stripped and the payload digest matches, then checks
+# the update pass turned the unchanged assets into revisits (no full response).
+
+set -eu
+
+: "${top_srcdir:=..}"
+
+# page.html body served by tests/local-server.py (route_mini304_page).
+export WARC_VALIDATE_BODY="page.html=3c68746d6c3e3c626f64793e74696e7920636163686561626c6520706167653c2f626f64793e3c2f68746d6c3e0a"
+export WARC_VALIDATE_NORESP="index.html page.html"
+
+bash "$top_srcdir/tests/local-crawl.sh" --errors 0 --rerun --warc-validate \
+    --log-found 'no files updated' \
+    --found 'mini304/index.html' --found 'mini304/page.html' \
+    httrack 'BASEURL/mini304/index.html' --warc-file warc-out

tests/Makefile.am

@@ -3,7 +3,7 @@
 # silently drop it from the dist tarball and break "make distcheck".
 EXTRA_DIST = $(TESTS) crawl-test.sh run-all-tests.sh check-network.sh \
 	proxy-https-server.py socks5-server.py proxy-connect-server.py \
-	proxytestlib.py tls-stall-server.py \
+	proxytestlib.py tls-stall-server.py warc-validate.py \
 	local-crawl.sh local-server.py testlib.sh server.crt server.key \
 	server-root/simple/basic.html server-root/simple/link.html \
 	server-root/stripquery/index.html server-root/stripquery/a.html \
@@ -38,6 +38,8 @@ TESTS = \
 	01_engine-dnstimeout.test \
 	01_engine-doitlog.test \
 	01_engine-entities.test \
+	01_engine-footerfmt.test \
+	01_engine-footer-overflow.test \
 	01_engine-filelist.test \
 	01_engine-filter.test \
 	01_engine-filterdual.test \
@@ -78,6 +80,7 @@ TESTS = \
 	01_engine-version-macros.test \
 	01_engine-xfread.test \
 	01_zlib-acceptencoding.test \
+	01_zlib-warc.test \
 	01_zlib-contentcodings.test \
 	01_zlib-cache.test \
 	01_zlib-cache-corrupt.test \
@@ -153,6 +156,7 @@ TESTS = \
 	68_webhttrack-outdir-charset.test \
 	69_local-intl-logdir.test \
 	71_local-crange-repaircache.test \
-	72_watchdog-crawl.test
+	72_watchdog-crawl.test \
+	73_local-warc.test
 
 CLEANFILES = check-network_sh.cache

tests/local-crawl.sh

@@ -47,6 +47,7 @@ key="${testdir}/server.key"
 
 tls=
 verbose=
+warc_validate=
 html_subdir=
 outdir_intl=
 rerun=
@@ -114,6 +115,8 @@ while test "$pos" -lt "$nargs"; do
     --debug) verbose=1 ;;
     --rerun) rerun=1 ;;           # run httrack a second time (update pass) before auditing
     --rerun-dead) rerun_dead=1 ;; # re-run with the server stopped (cache rollback)
+    # validate the produced .warc.gz (see the validation block near the end)
+    --warc-validate) warc_validate=1 ;;
     --no-purge)
         nopurge=1
         audit+=("--no-purge")
@@ -183,16 +186,12 @@ debug "starting $python $server ${serverargs[*]}"
 "$python" "$(nativepath "$server")" "${serverargs[@]}" >"$serverlog" 2>&1 &
 serverpid=$!
 
-# Wait for the "PORT <n>" line (server prints it once bound).
+# Wait for the "PORT <n>" line (server prints it once bound). A cold Python
+# start under a parallel `make check -jN` can lag past a second on a loaded Windows runner.
 port=
-for _ in $(seq 1 50); do
-    if test -s "$serverlog"; then
-        line=$(head -n1 "$serverlog")
-        if test "${line%% *}" == "PORT"; then
-            port="${line#PORT }"
-            break
-        fi
-    fi
+for _ in $(seq 1 300); do
+    # Match anywhere: a startup warning merged via 2>&1 could precede the PORT line.
+    line=$(grep -m1 '^PORT ' "$serverlog" 2>/dev/null) && port="${line#PORT }" && break
     kill -0 "$serverpid" 2>/dev/null || die "server exited early: $(cat "$serverlog")"
     sleep 0.1
 done
@@ -263,6 +262,13 @@ test "$crawlres" -eq 0 || ! result "httrack exited $crawlres" || {
 result "OK"
 grep -iE "^[0-9:]*[[:space:]]Error:" "${logroot}/hts-log.txt" >&2
 
+# Snapshot the first-pass WARC before an update pass overwrites it: the fresh
+# crawl carries the full response bodies, the update pass only revisits.
+if test -n "$warc_validate"; then
+    w1=$(find "$mirrorroot" -maxdepth 2 -name '*.warc.gz' 2>/dev/null | sort | tail -n1)
+    test -z "$w1" || cp "$w1" "${tmpdir}/warc-pass1.gz"
+fi
+
 # --- optional second pass: re-mirror into the same dir (cache/update path) ----
 if test -n "$rerun"; then
     info "re-running httrack (update pass)"
@@ -354,6 +360,44 @@ done
 test -n "$hostroot" || die "could not find host root under $out"
 debug "host root: $hostroot"
 
+# --- optional WARC validation (stdlib validator, no warcio) ------------------
+# WARC_VALIDATE_BODY="URLSUB=HEX" byte-checks a fresh-crawl response body;
+# WARC_VALIDATE_NORESP="URLSUB..." asserts those assets are revisits post-update.
+if test -n "$warc_validate"; then
+    validator=$(nativepath "${testdir}/warc-validate.py")
+    warc=$(find "$mirrorroot" -maxdepth 2 \( -name '*.warc.gz' -o -name '*.warc' \) 2>/dev/null | sort | tail -n1)
+    test -n "$warc" || die "no WARC file produced under $mirrorroot"
+
+    # Fresh-crawl file (snapshot if an update pass overwrote it): full responses.
+    fresh="${tmpdir}/warc-pass1.gz"
+    test -f "$fresh" || fresh="$warc"
+    declare -a bodyargs=()
+    if test -n "${WARC_VALIDATE_BODY:-}"; then
+        bodyargs=(--expect-body-hex "$WARC_VALIDATE_BODY")
+    fi
+    info "validating fresh WARC (response bodies)"
+    "$python" "$validator" "$(nativepath "$fresh")" "${bodyargs[@]}" >&2 ||
+        die "fresh WARC validation failed"
+    result "OK"
+
+    # Final file: after an update pass the unchanged assets must be revisits.
+    if test -n "$rerun"; then
+        declare -a revargs=(--expect-revisit)
+        for sub in ${WARC_VALIDATE_NORESP:-}; do
+            revargs+=(--no-response-for "$sub")
+        done
+        info "validating update WARC (revisits)"
+        "$python" "$validator" "$(nativepath "$warc")" "${revargs[@]}" >&2 ||
+            die "update WARC validation failed"
+        result "OK"
+    fi
+
+    if command -v warcio >/dev/null 2>&1; then
+        info "warcio check (optional)"
+        if warcio check -v "$warc" >&2; then result "OK"; else die "warcio check failed"; fi
+    fi
+fi
+
 # No crawl, even a cancelled one, may leave engine temporaries: .delayed (#107,
 # #483), or the .z/.u content-coding temps (#557).
 info "checking for leftover engine temporaries"

tests/warc-validate.py

@@ -0,0 +1,136 @@
+#!/usr/bin/env python3
+# Structural + semantic WARC/1.1 validator, Python stdlib only (no warcio):
+# walks the concatenated gzip members with zlib (gzip.decompress would fuse them
+# and lose per-record boundaries) and checks each record against the spec.
+#
+# Options:
+#   --expect-revisit          at least one revisit record must be present
+#   --expect-body-hex SUB=HEX a response whose WARC-Target-URI contains SUB must
+#                             have an entity body byte-equal to bytes.fromhex(HEX),
+#                             no Content-Encoding/Transfer-Encoding header, and a
+#                             WARC-Payload-Digest matching sha1(body) when present
+#   --no-response-for SUB     the asset containing SUB must be a revisit: no
+#                             response may target it, and a revisit must
+import base64
+import hashlib
+import sys
+import zlib
+
+
+def records(data):
+    """Yield each record's decompressed bytes (one gzip member per record)."""
+    if data[:2] != b"\x1f\x8b":  # uncompressed .warc: split on the record magic
+        parts = data.split(b"WARC/1.")
+        for p in parts[1:]:
+            yield b"WARC/1." + p
+        return
+    while data:
+        d = zlib.decompressobj(zlib.MAX_WBITS | 16)
+        block = d.decompress(data) + d.flush()
+        yield block
+        data = d.unused_data
+
+
+def field(header, name):
+    for line in header.split(b"\r\n"):
+        if line.lower().startswith(name.lower() + b":"):
+            return line.split(b":", 1)[1].strip()
+    return None
+
+
+def opt_values(argv, name):
+    out = []
+    for i, a in enumerate(argv):
+        if a == name and i + 1 < len(argv):
+            out.append(argv[i + 1])
+    return out
+
+
+def check_body(rec, http_hdr, body, sub, want):
+    if b"Content-Encoding" in http_hdr or b"Transfer-Encoding" in http_hdr:
+        sys.exit("record for %s kept a content/transfer-encoding header" % sub)
+    if body != want:
+        sys.exit(
+            "body mismatch for %s: got %d bytes, expected %d"
+            % (sub, len(body), len(want))
+        )
+    pd = field(rec[: rec.find(b"\r\n\r\n")], b"WARC-Payload-Digest")
+    if pd is not None and pd.startswith(b"sha1:"):
+        want_b32 = base64.b32encode(hashlib.sha1(want).digest()).decode("ascii")
+        if pd[5:].decode("ascii") != want_b32:
+            sys.exit("WARC-Payload-Digest mismatch for %s" % sub)
+
+
+def main():
+    argv = sys.argv[1:]
+    expect_revisit = "--expect-revisit" in argv
+    body_specs = [s.split("=", 1) for s in opt_values(argv, "--expect-body-hex")]
+    no_resp = opt_values(argv, "--no-response-for")
+    path = [a for a in argv if not a.startswith("--") and "=" not in a][0]
+    data = open(path, "rb").read()
+
+    total = revisits = responses = infos = 0
+    body_hits = {sub: False for sub, _ in body_specs}
+    revisit_hits = {sub: False for sub in no_resp}
+    for rec in records(data):
+        total += 1
+        if not rec.startswith(b"WARC/1."):
+            sys.exit("record %d: bad magic %r" % (total, rec[:16]))
+        sep = rec.find(b"\r\n\r\n")
+        if sep < 0:
+            sys.exit("record %d: no header terminator" % total)
+        hdr_end = sep + 4
+        header = rec[:sep]
+        cl = field(header, b"Content-Length")
+        if cl is None:
+            sys.exit("record %d: no Content-Length" % total)
+        block_len = int(cl)
+        if hdr_end + block_len + 4 != len(rec):
+            sys.exit(
+                "record %d: Content-Length %d != block length %d"
+                % (total, block_len, len(rec) - hdr_end - 4)
+            )
+        if rec[hdr_end + block_len :] != b"\r\n\r\n":
+            sys.exit("record %d: missing \\r\\n\\r\\n trailer" % total)
+        wtype = field(header, b"WARC-Type")
+        uri = field(header, b"WARC-Target-URI") or b""
+        if wtype == b"warcinfo":
+            infos += 1
+        elif wtype == b"response":
+            responses += 1
+            for sub in no_resp:
+                if sub.encode() in uri:
+                    sys.exit("unexpected full response for %s (want revisit)" % sub)
+            block = rec[hdr_end : hdr_end + block_len]
+            bsep = block.find(b"\r\n\r\n")
+            http_hdr, body = block[:bsep], block[bsep + 4 :]
+            for sub, hexval in body_specs:
+                if sub.encode() in uri:
+                    check_body(rec, http_hdr, body, sub, bytes.fromhex(hexval))
+                    body_hits[sub] = True
+        elif wtype == b"revisit":
+            revisits += 1
+            for sub in no_resp:
+                if sub.encode() in uri:
+                    revisit_hits[sub] = True
+
+    if total < 1:
+        sys.exit("no records found")
+    if infos != 1:
+        sys.exit("expected exactly one warcinfo record, got %d" % infos)
+    if expect_revisit and revisits < 1:
+        sys.exit("expected at least one revisit record, found none")
+    for sub, hit in body_hits.items():
+        if not hit:
+            sys.exit("no response record found for --expect-body-hex %s" % sub)
+    for sub, hit in revisit_hits.items():
+        if not hit:
+            sys.exit("no revisit record found for unchanged asset %s" % sub)
+    print(
+        "warc-validate: %d records OK (%d response, %d revisit)"
+        % (total, responses, revisits)
+    )
+
+
+if __name__ == "__main__":
+    main()

tests/webhttrack-smoke.sh

@@ -46,9 +46,12 @@ cat >"$stubdir/x-www-browser" <<EOF
 echo "stub browser invoked with: \$1" >&2
 # Also fetch an option page and require a rendered title='' tooltip: proves the
 # option template expands and the \${html:} filter escapes into the attribute.
+# option9 additionally proves the WARC control renders with its expanded label.
 opturl="\${1%/}/server/option2.html"
+warcurl="\${1%/}/server/option9.html"
 if body="\$(curl -fsSL --max-time 20 "\$1")" && printf '%s' "\$body" | grep -qai httrack && printf '%s' "\$body" | grep -qaF step2.html &&
-    opt="\$(curl -fsSL --max-time 20 "\$opturl")" && printf '%s' "\$opt" | grep -qaF "title='"; then
+    opt="\$(curl -fsSL --max-time 20 "\$opturl")" && printf '%s' "\$opt" | grep -qaF "title='" &&
+    warc="\$(curl -fsSL --max-time 20 "\$warcurl")" && printf '%s' "\$warc" | grep -qaF 'name="warcfile"' && printf '%s' "\$warc" | grep -qaF WARC; then
     echo PASS >"$marker"
 else
     echo "FAIL: unexpected response from \$1" >"$marker"