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 +1,80 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_TIMECONDITION
+Section: 3
+Source: libcurl
+See-also:
+  - CURLINFO_FILETIME (3)
+  - CURLOPT_TIMEVALUE (3)
+Protocol:
+  - HTTP
+  - FILE
+  - FTP
+Added-in: 7.1
+---
+
+# NAME
+
+CURLOPT_TIMECONDITION - select condition for a time request
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TIMECONDITION, long cond);
+~~~
+
+# DESCRIPTION
+
+Pass a long as parameter. This defines how the CURLOPT_TIMEVALUE(3) time value
+is treated. You can set this parameter to *CURL_TIMECOND_IFMODSINCE* or
+*CURL_TIMECOND_IFUNMODSINCE*.
+
+The last modification time of a file is not always known and in such instances
+this feature has no effect even if the given time condition would not have
+been met. curl_easy_getinfo(3) with the *CURLINFO_CONDITION_UNMET* option can
+be used after a transfer to learn if a zero-byte successful "transfer" was due
+to this condition not matching.
+
+# DEFAULT
+
+CURL_TIMECOND_NONE (0)
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+    /* January 1, 2020 is 1577833200 */
+    curl_easy_setopt(curl, CURLOPT_TIMEVALUE, 1577833200L);
+
+    /* If-Modified-Since the above time stamp */
+    curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
+
+    /* Perform the request */
+    curl_easy_perform(curl);
+  }
+}
+~~~
+
+# HISTORY
+
+**CURL_TIMECOND_*** enums became `long` types in 8.13.0, 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).