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: curl_easy_unescape
+Section: 3
+Source: libcurl
+See-also:
+  - curl_easy_escape (3)
+  - curl_url_get (3)
+Protocol:
+  - All
+Added-in: 7.15.4
+---
+
+# NAME
+
+curl_easy_unescape - URL decode a string
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+char *curl_easy_unescape(CURL *curl, const char *input,
+                         int inlength, int *outlength);
+~~~
+
+# DESCRIPTION
+
+This function converts the URL encoded string **input** to a "plain string"
+and returns that in an allocated memory area. All input characters that are URL
+encoded (%XX where XX is a two-digit hexadecimal number) are converted to their
+binary versions.
+
+If the **length** argument is set to 0 (zero), curl_easy_unescape(3)
+uses strlen() on **input** to find out the size.
+
+If **outlength** is non-NULL, the function writes the length of the returned
+string in the integer it points to. This allows proper handling even for
+strings containing %00. Since this is a pointer to an *int* type, it can
+only return a value up to *INT_MAX* so no longer string can be returned in
+this parameter.
+
+Since 7.82.0, the **curl** parameter is ignored. Prior to that there was
+per-handle character conversion support for some old operating systems such as
+TPF, but it was otherwise ignored.
+
+You must curl_free(3) the returned string when you are done with it.
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    int decodelen;
+    char *decoded = curl_easy_unescape(curl, "%63%75%72%6c", 12, &decodelen);
+    if(decoded) {
+      /* do not assume printf() works on the decoded data */
+      printf("Decoded: ");
+      /* ... */
+      curl_free(decoded);
+    }
+    curl_easy_cleanup(curl);
+  }
+}
+~~~
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+A pointer to a null-terminated string or NULL if it failed.