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comparison mupdf-source/thirdparty/curl/docs/examples/postinmemory.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2019, 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.haxx.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 ***************************************************************************/
22 /* <DESC>
23 * Make a HTTP POST with data from memory and receive response in memory.
24 * </DESC>
25 */
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <curl/curl.h>
30
31 struct MemoryStruct {
32 char *memory;
33 size_t size;
34 };
35
36 static size_t
37 WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
38 {
39 size_t realsize = size * nmemb;
40 struct MemoryStruct *mem = (struct MemoryStruct *)userp;
41
42 char *ptr = realloc(mem->memory, mem->size + realsize + 1);
43 if(!ptr) {
44 /* out of memory! */
45 printf("not enough memory (realloc returned NULL)\n");
46 return 0;
47 }
48
49 mem->memory = ptr;
50 memcpy(&(mem->memory[mem->size]), contents, realsize);
51 mem->size += realsize;
52 mem->memory[mem->size] = 0;
53
54 return realsize;
55 }
56
57 int main(void)
58 {
59 CURL *curl;
60 CURLcode res;
61 struct MemoryStruct chunk;
62 static const char *postthis = "Field=1&Field=2&Field=3";
63
64 chunk.memory = malloc(1); /* will be grown as needed by realloc above */
65 chunk.size = 0; /* no data at this point */
66
67 curl_global_init(CURL_GLOBAL_ALL);
68 curl = curl_easy_init();
69 if(curl) {
70 curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.org/");
71
72 /* send all data to this function */
73 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
74
75 /* we pass our 'chunk' struct to the callback function */
76 curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
77
78 /* some servers don't like requests that are made without a user-agent
79 field, so we provide one */
80 curl_easy_setopt(curl, CURLOPT_USERAGENT, "libcurl-agent/1.0");
81
82 curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postthis);
83
84 /* if we don't provide POSTFIELDSIZE, libcurl will strlen() by
85 itself */
86 curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (long)strlen(postthis));
87
88 /* Perform the request, res will get the return code */
89 res = curl_easy_perform(curl);
90 /* Check for errors */
91 if(res != CURLE_OK) {
92 fprintf(stderr, "curl_easy_perform() failed: %s\n",
93 curl_easy_strerror(res));
94 }
95 else {
96 /*
97 * Now, our chunk.memory points to a memory block that is chunk.size
98 * bytes big and contains the remote file.
99 *
100 * Do something nice with it!
101 */
102 printf("%s\n",chunk.memory);
103 }
104
105 /* always cleanup */
106 curl_easy_cleanup(curl);
107
108 /* we're done with libcurl, so clean it up */
109 curl_global_cleanup();
110 }
111 free(chunk.memory);
112 return 0;
113 }