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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 auto- matically 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 ref- erer 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 result; 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); result = curl_easy_perform(curl); curl_easy_cleanup(curl); } } AVAILABILITY Added in curl 7.1 RETURN VALUE curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLINFO_EFFECTIVE_URL(3), CURLINFO_REDIRECT_URL(3), CURLINFO_REFERER(3), CURLOPT_FOLLOWLOCATION(3), CURLOPT_REFERER(3) libcurl 2026-06-11 CURLOPT_AUTOREFERER(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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