Dear libcurl dev-team! I was trying out a few things in qemu-img, a virtualisation utility which depends on libcurl. And with the signed-urls recently becoming more common, I stumbled upon the following issue. The signed-urls I will be talking about are for S3 [1].
A signed-url can have it's HTTP method be included in the signature, so a signed-url with the GET method included in it's signature, when used by a HTTP HEAD method will return a 403 forbidden. Program's like qemu-img will want to first get the Content-Length. Normally this would mean a HEAD request. But that's not possible, hence the signed-url. What I basically want is: curl -X GET -I http://random.url/object I tried to implement it in qemu-img [2] but ended up always getting a CURLE_WRITE_ERROR, due to the body not being written anywhere. Is it possible to include a curl_easy_setopt() option to discard the response body and stop the connection after the HEADER? So that the curl_easy_perform() will still return 0 on success, and we don't need to check for a CURLE_WRITE_ERROR? [1] http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html#ConstructingTheAuthenticationHeader [2] https://lists.nongnu.org/archive/html/qemu-devel/2015-12/msg01131.html -- Met vriendelijke groet / Kind regards, Boris Schrijver PCextreme B.V. http://www.pcextreme.nl/contact Tel direct: +31 (0) 118 700 215 ------------------------------------------------------------------- List admin: http://cool.haxx.se/list/listinfo/curl-library Etiquette: http://curl.haxx.se/mail/etiquette.html
