---
name: "CURLINFO_REFERER"
section: "3"
platform: "linux"
package: "curl"
version: "8.23.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLINFO_REFERER"
---

# CURLINFO\_REFERER(3)

used HTTP referrer request header

## NAME

CURLINFO\_REFERER - used HTTP referrer request header

## SYNOPSIS

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

## DESCRIPTION

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. The memory gets freed automatically when you call *[curl\_easy\_cleanup(3)](/curl_easy_cleanup/3.md)* on the corresponding curl handle.

## 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");
    curl_easy_setopt(curl, CURLOPT_REFERER, "https://example.org/referrer");
    result = curl_easy_perform(curl);
    if(result == CURLE_OK) {
      char *hdr = NULL;
      curl_easy_getinfo(curl, CURLINFO_REFERER, &hdr);
      if(hdr)
        printf("Referrer header: %s\n", hdr);
    }
    curl_easy_cleanup(curl);
  }
}
```

## AVAILABILITY

Added in curl 7.76.0

## RETURN VALUE

*[curl\_easy\_getinfo(3)](/curl_easy_getinfo/3.md)* returns a CURLcode indicating success or error.

CURLE\_OK (0) means everything was OK, non-zero means an error occurred, see *[libcurl-errors(3)](/libcurl-errors/3.md)*.

## SEE ALSO

[**CURLOPT\_REFERER**(3)](/CURLOPT_REFERER/3.md), [**curl\_easy\_getinfo**(3)](/curl_easy_getinfo/3.md), [**curl\_easy\_header**(3)](/curl_easy_header/3.md), [**curl\_easy\_setopt**(3)](/curl_easy_setopt/3.md)