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 +1,81 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLINFO_CONDITION_UNMET
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_TIMECONDITION (3)
+  - CURLOPT_TIMEVALUE (3)
+  - curl_easy_getinfo (3)
+  - curl_easy_setopt (3)
+Protocol:
+  - HTTP
+Added-in: 7.19.4
+---
+
+# NAME
+
+CURLINFO_CONDITION_UNMET - get info on unmet time conditional or 304 HTTP response.
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONDITION_UNMET,
+                           long *unmet);
+~~~
+
+# DESCRIPTION
+
+Pass a pointer to a long to receive the number 1 if the condition provided in
+the previous request did not match (see CURLOPT_TIMECONDITION(3)). Alas,
+if this returns a 1 you know that the reason you did not get data in return is
+because it did not fulfill the condition. The long this argument points to
+gets a zero stored if the condition instead was met. This can also return 1 if
+the server responded with a 304 HTTP status code, for example after sending a
+custom "If-Match-*" header.
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode res;
+
+    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 */
+    res = curl_easy_perform(curl);
+
+    if(!res) {
+      /* check the time condition */
+      long unmet;
+      res = curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &unmet);
+      if(!res) {
+        printf("The time condition was %sfulfilled\n", unmet?"NOT":"");
+      }
+    }
+  }
+}
+~~~
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+curl_easy_getinfo(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).