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etag-compare.md

etag-compare.md 758 B
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c: Copyright (C) Daniel Stenberg, daniel@haxx.se, et al. SPDX-License-Identifier: curl Long: etag-compare Arg: Help: Load ETag from file Protocols: HTTP Added: 7.68.0 Category: http Multi: single See-also:

  • etag-save
  • time-cond Example:
  • --etag-compare etag.txt $URL ---

--etag-compare

Make a conditional HTTP request for the specific ETag read from the given file by sending a custom If-None-Match header using the stored ETag.

For correct results, make sure that the specified file contains only a single line with the desired ETag. An empty file is parsed as an empty ETag.

Use the option --etag-save to first save the ETag from a response, and then use this option to compare against the saved ETag in a subsequent request.