CURLOPT_AUTOREFERER(3) | Library Functions Manual | CURLOPT_AUTOREFERER(3) |
NAME
CURLOPT_AUTOREFERER - automatically update the referer header
SYNOPSIS
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_AUTOREFERER, long autorefer);
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 CURLINFO_REFERER(3), applications can extract the actually used referer header after the transfer.
DEFAULT
0, disabled
PROTOCOLS
This functionality affects http only
EXAMPLE
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); } }
AVAILABILITY
Added in curl 7.1
RETURN VALUE
Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
SEE ALSO
CURLINFO_EFFECTIVE_URL(3), CURLINFO_REDIRECT_URL(3), CURLINFO_REFERER(3), CURLOPT_FOLLOWLOCATION(3), CURLOPT_REFERER(3)
2024-09-18 | libcurl |