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 +1,76 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLINFO_CONTENT_LENGTH_DOWNLOAD
+Section: 3
+Source: libcurl
+See-also:
+  - CURLINFO_CONTENT_LENGTH_UPLOAD (3)
+  - curl_easy_getinfo (3)
+  - curl_easy_setopt (3)
+Protocol:
+  - All
+Added-in: 7.6.1
+---
+
+# NAME
+
+CURLINFO_CONTENT_LENGTH_DOWNLOAD - get content-length of download
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD,
+                           double *content_length);
+~~~
+
+# DESCRIPTION
+
+Pass a pointer to a double to receive the content-length of the download. This
+is the value read from the Content-Length: field. This returns -1 if the size
+is not known.
+
+CURLINFO_CONTENT_LENGTH_DOWNLOAD_T(3) is a newer replacement that returns a more
+sensible variable type.
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode res;
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+    /* Perform the request */
+    res = curl_easy_perform(curl);
+
+    if(!res) {
+      /* check the size */
+      double cl;
+      res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &cl);
+      if(!res) {
+        printf("Size: %.0f\n", cl);
+      }
+    }
+  }
+}
+~~~
+
+# DEPRECATED
+
+Deprecated since 7.55.0.
+
+# %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).