quickjs-tart

quickjs-based runtime for wallet-core logic
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websocket-cb.c (2200B)

      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
      9  *
     10  * This software is licensed as described in the file COPYING, which
     11  * you should have received as part of this distribution. The terms
     12  * are also available at https://curl.se/docs/copyright.html.
     13  *
     14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
     15  * copies of the Software, and permit persons to whom the Software is
     16  * furnished to do so, under the terms of the COPYING file.
     17  *
     18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
     19  * KIND, either express or implied.
     20  *
     21  * SPDX-License-Identifier: curl
     22  *
     23  ***************************************************************************/
     24 /* <DESC>
     25  * WebSocket download-only using write callback
     26  * </DESC>
     27  */
     28 #include <stdio.h>
     29 #include <curl/curl.h>
     30 
     31 static size_t writecb(char *b, size_t size, size_t nitems, void *p)
     32 {
     33   CURL *easy = p;
     34   size_t i;
     35   const struct curl_ws_frame *frame = curl_ws_meta(easy);
     36   fprintf(stderr, "Type: %s\n", frame->flags & CURLWS_BINARY ?
     37           "binary" : "text");
     38   fprintf(stderr, "Bytes: %u", (unsigned int)(nitems * size));
     39   for(i = 0; i < nitems; i++)
     40     fprintf(stderr, "%02x ", (unsigned char)b[i]);
     41   return nitems;
     42 }
     43 
     44 int main(void)
     45 {
     46   CURL *curl;
     47   CURLcode res;
     48 
     49   curl = curl_easy_init();
     50   if(curl) {
     51     curl_easy_setopt(curl, CURLOPT_URL, "wss://example.com");
     52 
     53     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writecb);
     54     /* pass the easy handle to the callback */
     55     curl_easy_setopt(curl, CURLOPT_WRITEDATA, curl);
     56 
     57     /* Perform the request, res gets the return code */
     58     res = curl_easy_perform(curl);
     59     /* Check for errors */
     60     if(res != CURLE_OK)
     61       fprintf(stderr, "curl_easy_perform() failed: %s\n",
     62               curl_easy_strerror(res));
     63 
     64     /* always cleanup */
     65     curl_easy_cleanup(curl);
     66   }
     67   return 0;
     68 }