CURLOPT_AUTOREFERER(3)

1CURLOPT_AUTOREFERER(3)              libcurl             CURLOPT_AUTOREFERER(3)
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NAME

6       CURLOPT_AUTOREFERER - automatically update the referer header
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SYNOPSIS

9       #include <curl/curl.h>
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11       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_AUTOREFERER, long autorefer);
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DESCRIPTION

14       Pass  a  long  parameter set to 1 to enable this. When enabled, libcurl
15       will automatically set the Referer: header field in  HTTP  requests  to
16       the full URL where it follows a Location: redirect.
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18       The  automatic  referer is set to the full previous URL even when redi‐
19       rects are done cross-origin or following redirects to  insecure  proto‐
20       cols. This is considered a minor privacy leak by some.
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DEFAULT

23       0, disabled
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PROTOCOLS

26       HTTP
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EXAMPLE

29       CURL *curl = curl_easy_init();
30       if(curl) {
31         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
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33         /* follow redirects */
34         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
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36         /* set Referer: automatically when following redirects */
37         curl_easy_setopt(curl, CURLOPT_AUTOREFERER, 1L);
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39         ret = curl_easy_perform(curl);
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41         curl_easy_cleanup(curl);
42       }
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AVAILABILITY

45       Along with HTTP
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RETURN VALUE

48       Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
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