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curl/docs/cmdline-opts/etag-compare.d
Daniel Stenberg d7f737dd13
docs: make gen.pl support *italic* and **bold**
Remove some nroffisms from the cmdline doc files to simplify editing,
and instead support this markdown style.

Closes #6771
2021-03-22 16:50:58 +01:00

20 lines
709 B
Makefile

Long: etag-compare
Arg: <file>
Help: Pass an ETag from a file as a custom header
Protocols: HTTP
Added: 7.68.0
Category: http
---
This option makes a conditional HTTP request for the specific
ETag read from the given file by sending a custom If-None-Match
header using the extracted ETag.
For correct results, make sure that specified file contains only a single
line with a 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 using the saved ETag in a subsequent request.
**COMPARISON**: There are 2 types of comparison or ETags: Weak and Strong.
This option expects, and uses a strong comparison.