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23 .TH CURLOPT_HEADEROPT 3 "May 30, 2017" "libcurl 7.59.0" "curl_easy_setopt options"
26 CURLOPT_HEADEROPT \- set how to send HTTP headers
28 #include <curl/curl.h>
30 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HEADEROPT, long bitmask);
32 Pass a long that is a bitmask of options of how to deal with headers. The two
33 mutually exclusive options are:
35 \fBCURLHEADER_UNIFIED\fP - the headers specified in
36 \fICURLOPT_HTTPHEADER(3)\fP will be used in requests both to servers and
37 proxies. With this option enabled, \fICURLOPT_PROXYHEADER(3)\fP will not have
40 \fBCURLHEADER_SEPARATE\fP - makes \fICURLOPT_HTTPHEADER(3)\fP headers only get
41 sent to a server and not to a proxy. Proxy headers must be set with
42 \fICURLOPT_PROXYHEADER(3)\fP to get used. Note that if a non-CONNECT request
43 is sent to a proxy, libcurl will send both server headers and proxy
44 headers. When doing CONNECT, libcurl will send \fICURLOPT_PROXYHEADER(3)\fP
45 headers only to the proxy and then \fICURLOPT_HTTPHEADER(3)\fP headers only to
48 CURLHEADER_SEPARATE (changed in 7.42.1, ased CURLHEADER_UNIFIED before then)
53 CURL *curl = curl_easy_init();
56 struct curl_slist *list;
57 list = curl_slist_append(NULL, "Shoesize: 10");
58 list = curl_slist_append(list, "Accept:");
59 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
60 curl_easy_setopt(curl, CURLOPT_PROXY, "http://localhost:8080");
62 /* HTTPS over a proxy makes a separate CONNECT to the proxy, so tell
63 libcurl to not send the custom headers to the proxy. Keep them
65 curl_easy_setopt(curl, CURLOPT_HEADEROPT, CURLHEADER_SEPARATE);
66 ret = curl_easy_perform(curl);
67 curl_easy_cleanup(curl);
73 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
75 .BR CURLOPT_HTTPHEADER "(3), " CURLOPT_PROXYHEADER "(3), "