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 +1,86 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_COPYPOSTFIELDS
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_MIMEPOST (3)
+  - CURLOPT_POSTFIELDS (3)
+  - CURLOPT_POSTFIELDSIZE (3)
+  - CURLOPT_UPLOAD (3)
+Protocol:
+  - HTTP
+  - MQTT
+  - RTSP
+Added-in: 7.17.1
+---
+
+# NAME
+
+CURLOPT_COPYPOSTFIELDS - have libcurl copy data to POST
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_COPYPOSTFIELDS, char *data);
+~~~
+
+# DESCRIPTION
+
+Pass a char pointer as parameter, which should be the full *data* to post in a
+HTTP POST operation. It behaves as the CURLOPT_POSTFIELDS(3) option, but the
+original data is instead copied by the library, allowing the application to
+overwrite the original data after setting this option.
+
+Because data is copied, care must be taken when using this option in
+conjunction with CURLOPT_POSTFIELDSIZE(3) or CURLOPT_POSTFIELDSIZE_LARGE(3).
+If the size has not been set prior to CURLOPT_COPYPOSTFIELDS(3), the data is
+assumed to be a null-terminated string; else the stored size informs the
+library about the byte count to copy. In any case, the size must not be
+changed after CURLOPT_COPYPOSTFIELDS(3), unless another CURLOPT_POSTFIELDS(3)
+or CURLOPT_COPYPOSTFIELDS(3) option is set.
+
+The application does not have to keep the string around after setting this
+option.
+
+Using this option multiple times makes the last set string override the
+previous ones. Set it to NULL to disable its use again.
+
+# DEFAULT
+
+NULL
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    char local_buffer[1024]="data to send";
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+    /* size of the data to copy from the buffer and send in the request */
+    curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, 12L);
+
+    /* send data from the local stack */
+    curl_easy_setopt(curl, CURLOPT_COPYPOSTFIELDS, local_buffer);
+
+    curl_easy_perform(curl);
+  }
+}
+~~~
+
+# %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).