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e3fe020089
Remove the PROTOCOLS section from the source files completely and instead generate them based on the header data in the curldown files. It also generates TLS backend information for options marked for TLS as protocol. Closes #13175
79 lines
2.1 KiB
Markdown
79 lines
2.1 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_HEADEROPT
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Section: 3
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Source: libcurl
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Protocol:
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- HTTP
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See-also:
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- CURLOPT_HTTPHEADER (3)
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- CURLOPT_PROXYHEADER (3)
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---
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# NAME
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CURLOPT_HEADEROPT - send HTTP headers to both proxy and host or separately
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HEADEROPT, long bitmask);
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~~~
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# DESCRIPTION
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Pass a long that is a bitmask of options of how to deal with headers. The two
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mutually exclusive options are:
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**CURLHEADER_UNIFIED** - the headers specified in
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CURLOPT_HTTPHEADER(3) are used in requests both to servers and
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proxies. With this option enabled, CURLOPT_PROXYHEADER(3) does not have
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any effect.
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**CURLHEADER_SEPARATE** - makes CURLOPT_HTTPHEADER(3) headers only get
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sent to a server and not to a proxy. Proxy headers must be set with
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CURLOPT_PROXYHEADER(3) to get used. Note that if a non-CONNECT request
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is sent to a proxy, libcurl sends both server headers and proxy headers. When
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doing CONNECT, libcurl sends CURLOPT_PROXYHEADER(3) headers only to the
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proxy and then CURLOPT_HTTPHEADER(3) headers only to the server.
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# DEFAULT
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CURLHEADER_SEPARATE (changed in 7.42.1, used CURLHEADER_UNIFIED before then)
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode ret;
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struct curl_slist *list;
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list = curl_slist_append(NULL, "Shoesize: 10");
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list = curl_slist_append(list, "Accept:");
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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curl_easy_setopt(curl, CURLOPT_PROXY, "http://localhost:8080");
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curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);
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/* HTTPS over a proxy makes a separate CONNECT to the proxy, so tell
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libcurl to not send the custom headers to the proxy. Keep them
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separate! */
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curl_easy_setopt(curl, CURLOPT_HEADEROPT, CURLHEADER_SEPARATE);
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ret = curl_easy_perform(curl);
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curl_slist_free_all(list);
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curl_easy_cleanup(curl);
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.37.0
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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