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comparison mupdf-source/thirdparty/curl/docs/examples/href_extractor.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) 2012 - 2016, 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
23 /* <DESC>
24 * Uses the "Streaming HTML parser" to extract the href pieces in a streaming
25 * manner from a downloaded HTML.
26 * </DESC>
27 */
28 /*
29 * The HTML parser is found at https://github.com/arjunc77/htmlstreamparser
30 */
31
32 #include <stdio.h>
33 #include <curl/curl.h>
34 #include <htmlstreamparser.h>
35
36
37 static size_t write_callback(void *buffer, size_t size, size_t nmemb,
38 void *hsp)
39 {
40 size_t realsize = size * nmemb, p;
41 for(p = 0; p < realsize; p++) {
42 html_parser_char_parse(hsp, ((char *)buffer)[p]);
43 if(html_parser_cmp_tag(hsp, "a", 1))
44 if(html_parser_cmp_attr(hsp, "href", 4))
45 if(html_parser_is_in(hsp, HTML_VALUE_ENDED)) {
46 html_parser_val(hsp)[html_parser_val_length(hsp)] = '\0';
47 printf("%s\n", html_parser_val(hsp));
48 }
49 }
50 return realsize;
51 }
52
53 int main(int argc, char *argv[])
54 {
55 char tag[1], attr[4], val[128];
56 CURL *curl;
57 HTMLSTREAMPARSER *hsp;
58
59 if(argc != 2) {
60 printf("Usage: %s URL\n", argv[0]);
61 return EXIT_FAILURE;
62 }
63
64 curl = curl_easy_init();
65
66 hsp = html_parser_init();
67
68 html_parser_set_tag_to_lower(hsp, 1);
69 html_parser_set_attr_to_lower(hsp, 1);
70 html_parser_set_tag_buffer(hsp, tag, sizeof(tag));
71 html_parser_set_attr_buffer(hsp, attr, sizeof(attr));
72 html_parser_set_val_buffer(hsp, val, sizeof(val)-1);
73
74 curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
75 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
76 curl_easy_setopt(curl, CURLOPT_WRITEDATA, hsp);
77 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
78
79 curl_easy_perform(curl);
80
81 curl_easy_cleanup(curl);
82
83 html_parser_cleanup(hsp);
84
85 return EXIT_SUCCESS;
86 }