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repo/core/curl/files/CURLOPT_AUTOREFERER.3
2024-08-02 20:52:59 -05:00

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.\" generated by cd2nroff 0.1 from CURLOPT_AUTOREFERER.md
.TH CURLOPT_AUTOREFERER 3 "2024-08-02" libcurl
.SH NAME
CURLOPT_AUTOREFERER \- automatically update the referer header
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_AUTOREFERER, long autorefer);
.fi
.SH DESCRIPTION
Pass a long parameter set to 1 to enable this. When enabled, libcurl
automatically sets the Referer: header field in HTTP requests to the full URL
when it follows a Location: redirect to a new destination.
The automatic referer is set to the full previous URL even when redirects are
done cross\-origin or following redirects to insecure protocols. This is
considered a minor privacy leak by some.
With \fICURLINFO_REFERER(3)\fP, applications can extract the actually used
referer header after the transfer.
.SH DEFAULT
0, disabled
.SH PROTOCOLS
This functionality affects http only
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
/* follow redirects */
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
/* set Referer: automatically when following redirects */
curl_easy_setopt(curl, CURLOPT_AUTOREFERER, 1L);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in curl 7.1
.SH RETURN VALUE
Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
.SH SEE ALSO
.BR CURLINFO_EFFECTIVE_URL (3),
.BR CURLINFO_REDIRECT_URL (3),
.BR CURLINFO_REFERER (3),
.BR CURLOPT_FOLLOWLOCATION (3),
.BR CURLOPT_REFERER (3)