| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. |
| * |
| * This software is licensed as described in the file COPYING, which |
| * you should have received as part of this distribution. The terms |
| * are also available at https://curl.se/docs/copyright.html. |
| * |
| * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| * copies of the Software, and permit persons to whom the Software is |
| * furnished to do so, under the terms of the COPYING file. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| * SPDX-License-Identifier: curl |
| * |
| ***************************************************************************/ |
| /* <DESC> |
| * WebSocket download-only using write callback |
| * </DESC> |
| */ |
| #include <stdio.h> |
| #include <curl/curl.h> |
| |
| static size_t writecb(char *b, size_t size, size_t nitems, void *p) |
| { |
| CURL *easy = p; |
| size_t i; |
| const struct curl_ws_frame *frame = curl_ws_meta(easy); |
| fprintf(stderr, "Type: %s\n", frame->flags & CURLWS_BINARY ? |
| "binary" : "text"); |
| fprintf(stderr, "Bytes: %u", (unsigned int)(nitems * size)); |
| for(i = 0; i < nitems; i++) |
| fprintf(stderr, "%02x ", (unsigned char)b[i]); |
| return nitems; |
| } |
| |
| int main(void) |
| { |
| CURL *curl; |
| CURLcode res; |
| |
| curl = curl_easy_init(); |
| if(curl) { |
| curl_easy_setopt(curl, CURLOPT_URL, "wss://example.com"); |
| |
| curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writecb); |
| /* pass the easy handle to the callback */ |
| curl_easy_setopt(curl, CURLOPT_WRITEDATA, curl); |
| |
| /* Perform the request, res will get the return code */ |
| res = curl_easy_perform(curl); |
| /* Check for errors */ |
| if(res != CURLE_OK) |
| fprintf(stderr, "curl_easy_perform() failed: %s\n", |
| curl_easy_strerror(res)); |
| |
| /* always cleanup */ |
| curl_easy_cleanup(curl); |
| } |
| return 0; |
| } |