CURLOPT_PROXYHEADER

Section: curl_easy_setopt options (3)
Updated: November 04, 2020
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NAME

CURLOPT_PROXYHEADER - custom HTTP headers to pass to proxy

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYHEADER,
                          struct curl_slist *headers);

DESCRIPTION

Pass a pointer to a linked list of HTTP headers to pass in your HTTP request sent to a proxy. The rules for this list is identical to the CURLOPT_HTTPHEADER(3) option's.

The headers set with this option is only ever used in requests sent to a proxy - when there's also a request sent to a host.

The first line in a request (containing the method, usually a GET or POST) is NOT a header and cannot be replaced using this option. Only the lines following the request-line are headers. Adding this method line in this list of headers will only cause your request to send an invalid header.

Pass a NULL to this to reset back to no custom headers.

DEFAULT

NULL

PROTOCOLS

HTTP

EXAMPLE

CURL *curl = curl_easy_init();

struct curl_slist *list;

if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
  curl_easy_setopt(curl, CURLOPT_PROXY, "http://proxy.example.com:80");

  list = curl_slist_append(NULL, "Shoesize: 10");
  list = curl_slist_append(list, "Accept:");

  curl_easy_setopt(curl, CURLOPT_PROXYHEADER, list);

  curl_easy_perform(curl);

  curl_slist_free_all(list); /* free the list again */
}

AVAILABILITY

Added in 7.37.0

RETURN VALUE

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