postit2-formadd.c (3896B)
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 * HTTP Multipart formpost with file upload and two additional parts. 26 * </DESC> 27 */ 28 29 /* 30 * Example code that uploads a filename 'foo' to a remote script that accepts 31 * "HTML form based" (as described in RFC 1738) uploads using HTTP POST. 32 * 33 * Warning: this example uses the deprecated form api. See "postit2.c" 34 * for a similar example using the mime api. 35 * 36 * The imaginary form we fill in looks like: 37 * 38 * <form method="post" enctype="multipart/form-data" action="examplepost.cgi"> 39 * Enter file: <input type="file" name="sendfile" size="40"> 40 * Enter filename: <input type="text" name="filename" size="30"> 41 * <input type="submit" value="send" name="submit"> 42 * </form> 43 */ 44 45 #include <stdio.h> 46 #include <string.h> 47 48 #include <curl/curl.h> 49 50 int main(int argc, char *argv[]) 51 { 52 CURL *curl; 53 CURLcode res; 54 55 struct curl_httppost *formpost = NULL; 56 struct curl_httppost *lastptr = NULL; 57 struct curl_slist *headerlist = NULL; 58 static const char buf[] = "Expect:"; 59 60 curl_global_init(CURL_GLOBAL_ALL); 61 62 CURL_IGNORE_DEPRECATION( 63 /* Fill in the file upload field */ 64 curl_formadd(&formpost, 65 &lastptr, 66 CURLFORM_COPYNAME, "sendfile", 67 CURLFORM_FILE, "postit2-formadd.c", 68 CURLFORM_END); 69 70 /* Fill in the filename field */ 71 curl_formadd(&formpost, 72 &lastptr, 73 CURLFORM_COPYNAME, "filename", 74 CURLFORM_COPYCONTENTS, "postit2-formadd.c", 75 CURLFORM_END); 76 77 78 /* Fill in the submit field too, even if this is rarely needed */ 79 curl_formadd(&formpost, 80 &lastptr, 81 CURLFORM_COPYNAME, "submit", 82 CURLFORM_COPYCONTENTS, "send", 83 CURLFORM_END); 84 ) 85 86 curl = curl_easy_init(); 87 /* initialize custom header list (stating that Expect: 100-continue is not 88 wanted */ 89 headerlist = curl_slist_append(headerlist, buf); 90 if(curl) { 91 /* what URL that receives this POST */ 92 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/examplepost.cgi"); 93 if((argc == 2) && (!strcmp(argv[1], "noexpectheader"))) 94 /* only disable 100-continue header if explicitly requested */ 95 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist); 96 CURL_IGNORE_DEPRECATION( 97 curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost); 98 ) 99 100 /* Perform the request, res gets the return code */ 101 res = curl_easy_perform(curl); 102 /* Check for errors */ 103 if(res != CURLE_OK) 104 fprintf(stderr, "curl_easy_perform() failed: %s\n", 105 curl_easy_strerror(res)); 106 107 /* always cleanup */ 108 curl_easy_cleanup(curl); 109 110 CURL_IGNORE_DEPRECATION( 111 /* then cleanup the formpost chain */ 112 curl_formfree(formpost); 113 ) 114 115 /* free slist */ 116 curl_slist_free_all(headerlist); 117 } 118 return 0; 119 }