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 +1,90 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_CONNECT_ONLY
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_HTTPPROXYTUNNEL (3)
+  - CURLOPT_VERBOSE (3)
+  - curl_easy_recv (3)
+  - curl_easy_send (3)
+Protocol:
+  - All
+Added-in: 7.15.2
+---
+
+# NAME
+
+CURLOPT_CONNECT_ONLY - stop when connected to target server
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CONNECT_ONLY, long only);
+~~~
+
+# DESCRIPTION
+
+Pass a long. If the parameter equals 1, it tells the library to perform all
+the required proxy authentication and connection setup, but no data transfer,
+and then return.
+
+The option can be used to simply test a connection to a server, but is more
+useful when used with the CURLINFO_ACTIVESOCKET(3) option to
+curl_easy_getinfo(3) as the library can set up the connection and then
+the application can obtain the most recently used socket for special data
+transfers.
+
+Since 7.86.0, this option can be set to '2' and if WebSocket is used,
+libcurl performs the request and reads all response headers before handing
+over control to the application. For other protocols the behavior of '2'
+is undefined.
+
+Transfers marked connect only do not reuse any existing connections and
+connections marked connect only are not allowed to get reused.
+
+If the connect only transfer is done using the multi interface, the particular
+easy handle must remain added to the multi handle for as long as the
+application wants to use it. Once it has been removed with
+curl_multi_remove_handle(3), curl_easy_send(3) and
+curl_easy_recv(3) do not function.
+
+# DEFAULT
+
+0
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode ret;
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
+    curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
+    ret = curl_easy_perform(curl);
+    if(ret == CURLE_OK) {
+      /* only connected */
+    }
+  }
+}
+~~~
+
+# HISTORY
+
+WS and WSS support added in 7.86.0.
+
+# %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).