annotate mupdf-source/thirdparty/curl/docs/examples/href_extractor.c @ 2:b50eed0cc0ef upstream

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 /***************************************************************************
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2 * _ _ ____ _
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3 * Project ___| | | | _ \| |
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4 * / __| | | | |_) | |
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5 * | (__| |_| | _ <| |___
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6 * \___|\___/|_| \_\_____|
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7 *
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8 * Copyright (C) 2012 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 *
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10 * This software is licensed as described in the file COPYING, which
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11 * you should have received as part of this distribution. The terms
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12 * are also available at https://curl.haxx.se/docs/copyright.html.
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13 *
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14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 * copies of the Software, and permit persons to whom the Software is
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16 * furnished to do so, under the terms of the COPYING file.
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17 *
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18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 * KIND, either express or implied.
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20 *
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21 ***************************************************************************/
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23 /* <DESC>
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24 * Uses the "Streaming HTML parser" to extract the href pieces in a streaming
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25 * manner from a downloaded HTML.
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26 * </DESC>
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27 */
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28 /*
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29 * The HTML parser is found at https://github.com/arjunc77/htmlstreamparser
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30 */
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32 #include <stdio.h>
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33 #include <curl/curl.h>
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34 #include <htmlstreamparser.h>
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37 static size_t write_callback(void *buffer, size_t size, size_t nmemb,
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38 void *hsp)
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39 {
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40 size_t realsize = size * nmemb, p;
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41 for(p = 0; p < realsize; p++) {
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42 html_parser_char_parse(hsp, ((char *)buffer)[p]);
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43 if(html_parser_cmp_tag(hsp, "a", 1))
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44 if(html_parser_cmp_attr(hsp, "href", 4))
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45 if(html_parser_is_in(hsp, HTML_VALUE_ENDED)) {
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46 html_parser_val(hsp)[html_parser_val_length(hsp)] = '\0';
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47 printf("%s\n", html_parser_val(hsp));
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48 }
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49 }
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50 return realsize;
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51 }
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53 int main(int argc, char *argv[])
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54 {
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55 char tag[1], attr[4], val[128];
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56 CURL *curl;
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57 HTMLSTREAMPARSER *hsp;
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59 if(argc != 2) {
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60 printf("Usage: %s URL\n", argv[0]);
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61 return EXIT_FAILURE;
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62 }
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64 curl = curl_easy_init();
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66 hsp = html_parser_init();
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68 html_parser_set_tag_to_lower(hsp, 1);
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69 html_parser_set_attr_to_lower(hsp, 1);
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70 html_parser_set_tag_buffer(hsp, tag, sizeof(tag));
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71 html_parser_set_attr_buffer(hsp, attr, sizeof(attr));
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72 html_parser_set_val_buffer(hsp, val, sizeof(val)-1);
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74 curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
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75 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
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76 curl_easy_setopt(curl, CURLOPT_WRITEDATA, hsp);
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77 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
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79 curl_easy_perform(curl);
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81 curl_easy_cleanup(curl);
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82
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83 html_parser_cleanup(hsp);
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85 return EXIT_SUCCESS;
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86 }