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 +1,78 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLINFO_RETRY_AFTER
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_HEADERFUNCTION (3)
+  - CURLOPT_STDERR (3)
+  - curl_easy_header (3)
+Protocol:
+  - All
+Added-in: 7.66.0
+---
+
+# NAME
+
+CURLINFO_RETRY_AFTER - returns the Retry-After retry delay
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_RETRY_AFTER,
+                           curl_off_t *retry);
+~~~
+
+# DESCRIPTION
+
+Pass a pointer to a curl_off_t variable to receive the number of seconds the
+HTTP server suggests the client should wait until the next request is
+issued. The information from the "Retry-After:" header.
+
+While the HTTP header might contain a fixed date string, the
+CURLINFO_RETRY_AFTER(3) always returns the number of seconds to wait -
+or zero if there was no header or the header could not be parsed.
+
+This option used to return a negative wait time if the server provided a date
+in the past. Since 8.12.0, a negative wait time is returned as zero. In any
+case we recommend checking that the wait time is within an acceptable range for
+your circumstance.
+
+# DEFAULT
+
+Zero if there was no 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");
+    res = curl_easy_perform(curl);
+    if(res == CURLE_OK) {
+      curl_off_t wait = 0;
+      curl_easy_getinfo(curl, CURLINFO_RETRY_AFTER, &wait);
+      if(wait)
+        printf("Wait for %" CURL_FORMAT_CURL_OFF_T " seconds\n", wait);
+    }
+    curl_easy_cleanup(curl);
+  }
+}
+~~~
+
+# %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).