NAME

       CURLOPT_HEADEROPT - send HTTP headers to both proxy and host or separately

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, used 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");
         curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);

         /* 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_slist_free_all(list);
         curl_easy_cleanup(curl);
       }

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),