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3f5bf4bd03
Improve remote write handling in vmagent by setting the
`Content-Encoding` header based on the actual request body, rather than
relying on configuration.
- Detects Zstd compression via the Zstd magic number.
- Falls back to Snappy if Zstd is not detected.
- Persistent queue may now contain mixed-encoding content.
- Add basic vmagent integration tests
Follow up on
https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5344 and
12cd32fd75.
Extracted from
https://github.com/VictoriaMetrics/VictoriaMetrics/pull/8462
Related issue:
https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5301
13 lines
443 B
Go
13 lines
443 B
Go
package encoding
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import "encoding/binary"
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// IsZstd checks if the given data is compressed using the zstd format.
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// It does this by verifying the presence of the zstd magic number (0xFD2FB528)
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// at the beginning of the byte slice.
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//
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// See: https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#zstandard-frames
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func IsZstd(data []byte) bool {
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return len(data) >= 4 && binary.LittleEndian.Uint32(data) == 0xFD2FB528
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}
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