CURLINFO_REFERER(3) Library Functions Manual CURLINFO_REFERER(3)

CURLINFO_REFERER - get the used referrer request header

#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_REFERER, char **hdrp);

Pass in a pointer to a char pointer and get the referrer header used in the most recent request.

The hdrp pointer is NULL or points to private memory you MUST NOT free - it gets freed when you call curl_easy_cleanup(3) on the corresponding CURL handle.

HTTP

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
    curl_easy_setopt(curl, CURLOPT_REFERER, "https://example.org/referrer");
    res = curl_easy_perform(curl);
    if(res == CURLE_OK) {
      char *hdr = NULL;
      curl_easy_getinfo(curl, CURLINFO_REFERER, &hdr);
      if(hdr)
        printf("Referrer header: %s\n", hdr);
    }
    curl_easy_cleanup(curl);
  }
}

Added in 7.76.0

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

CURLOPT_REFERER(3), curl_easy_getinfo(3), curl_easy_header(3), curl_easy_setopt(3)

2024-05-22 libcurl