2019-10-30 04:43:14 -04:00
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Long: etag-compare
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Arg: <file>
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Help: Pass an ETag from a file as a custom header
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Protocols: HTTP
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2019-12-02 05:22:32 -05:00
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Added: 7.68.0
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2019-10-30 04:43:14 -04:00
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---
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This option makes a conditional HTTP request for the specific
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ETag read from the given file by sending a custom If-None-Match
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header using the extracted ETag.
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For correct results, make sure that specified file contains only a single
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line with a desired ETag. An empty file is parsed as an empty ETag.
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Use the option --etag-save to first save the ETag from a response, and
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then use this option to compare using the saved ETag in a subsequent request.
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\fCOMPARISON\fP: There are 2 types of comparison or ETags, Weak and Strong.
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This option expects, and uses a strong comparison.
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