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https://github.com/xroche/httrack.git
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90 lines
3.3 KiB
C
Executable File
90 lines
3.3 KiB
C
Executable File
/*
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HTTrack external callbacks example : print all downloaded html documents
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How to build: (callback.so or callback.dll)
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With GNU-GCC:
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gcc -O -g3 -Wall -D_REENTRANT -shared -o mycallback.so callbacks-example.c -lhttrack1
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With MS-Visual C++:
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cl -LD -nologo -W3 -Zi -Zp4 -DWIN32 -Fe"mycallback.dll" callbacks-example.c libhttrack1.lib
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Note: the httrack library linker option is only necessary when using libhttrack's functions inside the callback
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How to use:
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httrack --wrapper mycallback ..
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*/
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/* system includes */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/* standard httrack module includes */
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#include "httrack-library.h"
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#include "htsopt.h"
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#include "htsdefines.h"
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/* external functions */
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EXTERNAL_FUNCTION int hts_plug(httrackp *opt, const char* argv);
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EXTERNAL_FUNCTION int hts_unplug(httrackp *opt);
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/* local function called as "check_html" callback */
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static int process_file(t_hts_callbackarg /*the carg structure, holding various information*/*carg, /*the option settings*/httrackp *opt,
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/*other parameters are callback-specific*/
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char* html, int len, const char* url_address, const char* url_file) {
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void *ourDummyArg = (void*) CALLBACKARG_USERDEF(carg); /*optional user-defined arg*/
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/* call parent functions if multiple callbacks are chained. you can skip this part, if you don't want previous callbacks to be called. */
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if (CALLBACKARG_PREV_FUN(carg, check_html) != NULL) {
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if (!CALLBACKARG_PREV_FUN(carg, check_html)(CALLBACKARG_PREV_CARG(carg), opt,
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html, len, url_address, url_file)) {
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return 0; /* abort */
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}
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}
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printf("file %s%s content: %s\n", url_address, url_file, html);
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return 1; /* success */
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}
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/* local function called as "end" callback */
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static int end_of_mirror(t_hts_callbackarg /*the carg structure, holding various information*/*carg, /*the option settings*/httrackp *opt) {
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void *ourDummyArg = (void*) CALLBACKARG_USERDEF(carg); /*optional user-defined arg*/
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/* processing */
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fprintf(stderr, "That's all, folks!\n");
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/* call parent functions if multiple callbacks are chained. you can skip this part, if you don't want previous callbacks to be called. */
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if (CALLBACKARG_PREV_FUN(carg, end) != NULL) {
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/* status is ok on our side, return other callabck's status */
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return CALLBACKARG_PREV_FUN(carg, end)(CALLBACKARG_PREV_CARG(carg), opt);
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}
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return 1; /* success */
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}
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/*
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module entry point
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the function name and prototype MUST match this prototype
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*/
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EXTERNAL_FUNCTION int hts_plug(httrackp *opt, const char* argv) {
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/* optional argument passed in the commandline we won't be using here */
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const char *arg = strchr(argv, ',');
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if (arg != NULL)
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arg++;
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/* plug callback functions */
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CHAIN_FUNCTION(opt, check_html, process_file, /*optional user-defined arg*/NULL);
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CHAIN_FUNCTION(opt, end, end_of_mirror, /*optional user-defined arg*/NULL);
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return 1; /* success */
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}
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/*
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module exit point
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the function name and prototype MUST match this prototype
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*/
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EXTERNAL_FUNCTION int hts_unplug(httrackp *opt) {
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fprintf(stderr, "Module unplugged");
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return 1; /* success */
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}
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