Update networking layer w/ CURL and emscripten impl

2025-11-08 01:50:36 +11:00
parent a17925904d
commit f6874dc55a
4105 changed files with 694617 additions and 179 deletions
@@ -0,0 +1,88 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_HEADEROPT
+Section: 3
+Source: libcurl
+Protocol:
+  - HTTP
+See-also:
+  - CURLOPT_HTTPHEADER (3)
+  - CURLOPT_PROXYHEADER (3)
+Added-in: 7.37.0
+---
+
+# NAME
+
+CURLOPT_HEADEROPT - send HTTP headers to both proxy and host or separately
+
+# SYNOPSIS
+
+~~~c
+#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) are used in requests both to servers and
+proxies. With this option enabled, CURLOPT_PROXYHEADER(3) does 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 sends both server headers and proxy headers. When
+doing CONNECT, libcurl sends 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%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  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);
+  }
+}
+~~~
+
+# HISTORY
+
+**CURLHEADER_*** macros became `long` types in 8.16.0, prior to this version
+a `long` cast was necessary when passed to curl_easy_setopt(3).
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+curl_easy_setopt(3) returns a CURLcode indicating success or error.
+
+CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
+libcurl-errors(3).