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 * using the multi interface to do a multipart formpost without blocking 26 * </DESC> 27 */ 28 29#include <stdio.h> 30#include <string.h> 31#include <sys/time.h> 32 33#include <curl/curl.h> 34 35int main(void) 36{ 37 CURL *curl; 38 39 CURLM *multi_handle; 40 int still_running = 0; 41 42 curl_mime *form = NULL; 43 curl_mimepart *field = NULL; 44 struct curl_slist *headerlist = NULL; 45 static const char buf[] = "Expect:"; 46 47 curl = curl_easy_init(); 48 multi_handle = curl_multi_init(); 49 50 if(curl && multi_handle) { 51 /* Create the form */ 52 form = curl_mime_init(curl); 53 54 /* Fill in the file upload field */ 55 field = curl_mime_addpart(form); 56 curl_mime_name(field, "sendfile"); 57 curl_mime_filedata(field, "multi-post.c"); 58 59 /* Fill in the filename field */ 60 field = curl_mime_addpart(form); 61 curl_mime_name(field, "filename"); 62 curl_mime_data(field, "multi-post.c", CURL_ZERO_TERMINATED); 63 64 /* Fill in the submit field too, even if this is rarely needed */ 65 field = curl_mime_addpart(form); 66 curl_mime_name(field, "submit"); 67 curl_mime_data(field, "send", CURL_ZERO_TERMINATED); 68 69 /* initialize custom header list (stating that Expect: 100-continue is not 70 wanted */ 71 headerlist = curl_slist_append(headerlist, buf); 72 73 /* what URL that receives this POST */ 74 curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/upload.cgi"); 75 curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); 76 77 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist); 78 curl_easy_setopt(curl, CURLOPT_MIMEPOST, form); 79 80 curl_multi_add_handle(multi_handle, curl); 81 82 do { 83 CURLMcode mc = curl_multi_perform(multi_handle, &still_running); 84 85 if(still_running) 86 /* wait for activity, timeout or "nothing" */ 87 mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL); 88 89 if(mc) 90 break; 91 } while(still_running); 92 93 curl_multi_cleanup(multi_handle); 94 95 /* always cleanup */ 96 curl_easy_cleanup(curl); 97 98 /* then cleanup the form */ 99 curl_mime_free(form); 100 101 /* free slist */ 102 curl_slist_free_all(headerlist); 103 } 104 return 0; 105} 106