CURLOPT_HEADEROPT(3)

CURLOPT_HEADEROPT(3)curl_easy_setopt options CURLOPT_HEADEROPT(3)

NAME

     CURLOPT_HEADEROPT - set how to send HTTP headers

SYNOPSIS

     #include <curl/curl.h>

     CURLcode curl_easy_setopt(CURL  *handle,  CURLOPT_HEADEROPT,
     long bitmask);

DESCRIPTION

     Pass a long that is a bitmask of options of how to deal with
     headers. The two mutually exclusive options are:

     CURLHEADER_UNIFIED    -    the    headers    specified    in
     CURLOPT_HTTPHEADER(3)  will  be  used  in  requests  both to
     servers   and   proxies.   With   this    option    enabled,
     CURLOPT_PROXYHEADER(3) will not have any effect.

     CURLHEADER_SEPARATE -  makes  CURLOPT_HTTPHEADER(3)  headers
     only  get sent to a server and not to a proxy. Proxy headers
     must be set with CURLOPT_PROXYHEADER(3) to  get  used.  Note
     that  if  a  non-CONNECT request is sent to a proxy, libcurl
     will send both server headers and proxy headers. When  doing
     CONNECT,  libcurl  will  send CURLOPT_PROXYHEADER(3) headers
     only to the proxy  and  then  CURLOPT_HTTPHEADER(3)  headers
     only to the server.

DEFAULT

     CURLHEADER_SEPARATE     (changed     in     7.42.1,     ased
     CURLHEADER_UNIFIED before then)

PROTOCOLS

     HTTP

EXAMPLE

     CURL *curl = curl_easy_init();
     if(curl) {
       CURLcode ret;
       struct curl_slist *list;
       list = curl_slist_append(NULL, "Shoesize: 10");
       list = curl_slist_append(list, "Accept:");
       curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
       curl_easy_setopt(curl, CURLOPT_PROXY, "http://localhost:8080");

       /* HTTPS over a proxy makes a separate CONNECT to the proxy, so tell
          libcurl to not send the custom headers to the proxy. Keep them
          separate! */
       curl_easy_setopt(curl, CURLOPT_HEADEROPT, CURLHEADER_SEPARATE);
       ret = curl_easy_perform(curl);
       curl_easy_cleanup(curl);
     }

libcurl 7.58.0      Last change: May 30, 2017                   1

CURLOPT_HEADEROPT(3)curl_easy_setopt options CURLOPT_HEADEROPT(3)

AVAILABILITY

     Added in 7.37.0

RETURN VALUE

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

SEE ALSO

     CURLOPT_HTTPHEADER(3), CURLOPT_PROXYHEADER(3),

libcurl 7.58.0      Last change: May 30, 2017                   2