72 lines
1.4 KiB
Markdown
72 lines
1.4 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_REFERER
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Section: 3
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Source: libcurl
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See-also:
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- CURLINFO_REDIRECT_URL (3)
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- CURLINFO_REFERER (3)
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- CURLOPT_HTTPHEADER (3)
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- CURLOPT_USERAGENT (3)
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Protocol:
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- HTTP
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Added-in: 7.1
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---
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# NAME
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CURLOPT_REFERER - the HTTP referer header
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_REFERER, char *where);
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~~~
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# DESCRIPTION
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Pass a pointer to a null-terminated string as parameter. It is used to set the
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Referer: header field in the HTTP request sent to the remote server. You can
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set any custom header with CURLOPT_HTTPHEADER(3).
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The application does not have to keep the string around after setting this
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option.
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Using this option multiple times makes the last set string override the
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previous ones. Set it to NULL to disable its use again.
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# DEFAULT
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NULL
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# %PROTOCOLS%
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* tell it where we found the link to this place */
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curl_easy_setopt(curl, CURLOPT_REFERER, "https://example.org/me.html");
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curl_easy_perform(curl);
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}
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}
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~~~
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# %AVAILABILITY%
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# RETURN VALUE
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curl_easy_setopt(3) returns a CURLcode indicating success or error.
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CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
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libcurl-errors(3).
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