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Long: etag-save
Arg: <file>
Help: Parse ETag from a request and save it to a file
Protocols: HTTP
Added: 7.68.0
Category: http
Example: --etag-save storetag.txt $URL
---
This option saves an HTTP ETag to the specified file. An ETag is a
caching related header, usually returned in a response.
If no ETag is sent by the server, an empty file is created.
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