/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2020, 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. * ***************************************************************************/ /* <DESC> * HTTP Multipart formpost with file upload and two additional parts. * </DESC> */ /* Example code that uploads a file name 'foo' to a remote script that accepts * "HTML form based" (as described in RFC1738) uploads using HTTP POST. * * The imaginary form we'll fill in looks like: * * <form method="post" enctype="multipart/form-data" action="examplepost.cgi"> * Enter file: <input type="file" name="sendfile" size="40"> * Enter file name: <input type="text" name="filename" size="30"> * <input type="submit" value="send" name="submit"> * </form> * */ #include <stdio.h> #include <string.h> #include <curl/curl.h> int main(int argc, char *argv[]) { CURL *curl; CURLcode res; curl_mime *form = NULL; curl_mimepart *field = NULL; struct curl_slist *headerlist = NULL; static const char buf[] = "Expect:"; curl_global_init(CURL_GLOBAL_ALL); curl = curl_easy_init(); if(curl) { /* Create the form */ form = curl_mime_init(curl); /* Fill in the file upload field */ field = curl_mime_addpart(form); curl_mime_name(field, "sendfile"); curl_mime_filedata(field, "postit2.c"); /* Fill in the filename field */ field = curl_mime_addpart(form); curl_mime_name(field, "filename"); curl_mime_data(field, "postit2.c", CURL_ZERO_TERMINATED); /* Fill in the submit field too, even if this is rarely needed */ field = curl_mime_addpart(form); curl_mime_name(field, "submit"); curl_mime_data(field, "send", CURL_ZERO_TERMINATED); /* initialize custom header list (stating that Expect: 100-continue is not wanted */ headerlist = curl_slist_append(headerlist, buf); /* what URL that receives this POST */ curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/examplepost.cgi"); if((argc == 2) && (!strcmp(argv[1], "noexpectheader"))) /* only disable 100-continue header if explicitly requested */ curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist); curl_easy_setopt(curl, CURLOPT_MIMEPOST, form); /* 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); /* then cleanup the form */ curl_mime_free(form); /* free slist */ curl_slist_free_all(headerlist); } return 0; }