CURLOPT_HEADEROPT - set how to send HTTP headers
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HEADEROPT, long bitmask);
Pass a long that is a bitmask of options of how to deal with headers. The two mutually exclusive options are:
CURLHEADER_UNIFIED - keep working as before. This means CURLOPT_HTTPHEADER headers will be used in requests both to servers and proxies. With this option enabled, CURLOPT_PROXYHEADER will not have any effect.
CURLHEADER_SEPARATE - makes CURLOPT_HTTPHEADER headers only get sent to a server and not to a proxy. Proxy headers must be set with CURLOPT_PROXYHEADER 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 headers only do the proxy and then CURLOPT_HTTPHEADER headers only to the server.
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
CURLOPT_HTTPHEADER CURLOPT_PROXYHEADER
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