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 +1,77 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_MAXLIFETIME_CONN
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_FORBID_REUSE (3)
+  - CURLOPT_FRESH_CONNECT (3)
+  - CURLOPT_MAXAGE_CONN (3)
+  - CURLOPT_TIMEOUT (3)
+Protocol:
+  - All
+Added-in: 7.80.0
+---
+
+# NAME
+
+CURLOPT_MAXLIFETIME_CONN - max lifetime (since creation) allowed for reusing a connection
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXLIFETIME_CONN,
+                          long maxlifetime);
+~~~
+
+# DESCRIPTION
+
+Pass a long as parameter containing *maxlifetime* - the maximum time in
+seconds, since the creation of the connection, that you allow an existing
+connection to have to be considered for reuse for this request.
+
+libcurl features a connection cache that holds previously used connections.
+When a new request is to be done, libcurl considers any connection that
+matches for reuse. The CURLOPT_MAXLIFETIME_CONN(3) limit prevents libcurl from
+trying too old connections for reuse. This can be used for client-side load
+balancing. If a connection is found in the cache that is older than this set
+*maxlifetime*, it is instead marked for closure.
+
+If set to 0, this behavior is disabled: all connections are eligible for
+reuse.
+
+# DEFAULT
+
+24 hours (since 8.17.0). Before that, the default was 0 seconds (i.e.,
+disabled)
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+    /* only allow each connection to be reused for 30 seconds */
+    curl_easy_setopt(curl, CURLOPT_MAXLIFETIME_CONN, 30L);
+
+    curl_easy_perform(curl);
+  }
+}
+~~~
+
+# %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).