On 4/28/25 02:37, Daniel Stenberg via curl-users wrote:
On Mon, 28 Apr 2025, Aleksei via curl-users wrote:
I'm trying to implement a "download only if updated on a remote
resource" functionality with a curl script using etags.
Currently the etag file saved with --etag-save becomes useless after
a single update on a remote resource.
I don't understand. Can you elaborate? If the remote resource is
indeed updated, surely it should download again and update the etag file?
...
This sounds like a site I use which, improperly, returns no ETag in the
headers when Status is 304. In that case, --etag-save overwrites the
ETag file which "becomes useless." I've circumvented with a wrapper
script. I shall not submit an enhancement request for cURL to
accommodate any misbehaving site.
--
gil
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