NAME

       CURLOPT_PROXYHEADER - set of 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 is 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 causes your request to send an
       invalid header.

       Using this option multiple times makes the last set list override the previous  ones.  Set
       it to NULL to disable its use again.

       libcurl  does  not  copy the list, it needs to be kept around until after the transfer has
       completed.

DEFAULT

       NULL

PROTOCOLS

       This functionality affects all supported protocols

EXAMPLE

       int main(void)
       {
         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 curl 7.37.0

RETURN VALUE

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

SEE ALSO

       CURLOPT_HEADEROPT(3), CURLOPT_HTTPHEADER(3)