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Frenschan Thread Image Downloader

Downloads all images individually in a frenschan thread with original filenames (by default).

当前为 2022-05-17 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Frenschan Thread Image Downloader
  3. // @namespace   Violentmonkey Scripts
  4. // @match       https://www.frenschan.com/*/res/*.html
  5. // @match       https://www.frenschan.org/*/res/*.html
  6. // @grant       GM_download
  7. // @grant       GM_registerMenuCommand
  8. // @version     1.1
  9. // @license     The Unlicense
  10. // @author      ImpatientImport
  11. // @description Downloads all images individually in a frenschan thread with original filenames (by default).
  12. // ==/UserScript==
  13.  
  14. /* EDIT ABOVE THIS LINE */
  15.  
  16. // User preferences
  17.  
  18. var download_limit = 3000; // speed in milliseconds to delay
  19.  
  20. /* EDIT BELOW THIS LINE */
  21.  
  22.  
  23. function sleep(ms) {
  24.     return new Promise(resolve => setTimeout(resolve, ms));
  25. }
  26.  
  27. (function() {
  28.   'use strict';
  29.   
  30.   // Constants for later reference
  31.   const top_of_thread = document.getElementsByClassName("intro")[0];
  32.   const thread_URL = document.URL;
  33.   const tinyboard_site = thread_URL.toString().split('/')[2];
  34.   const url_path = new URL(thread_URL).pathname;
  35.   const url_path_split = url_path.toString().split('/')
  36.   const thread_board = url_path_split[1];
  37.   const thread_num = url_path_split[3].split(".")[0];
  38.   
  39.   const json_url = "https://"+ tinyboard_site + "/"+ thread_board +"/res/"+ thread_num + ".json"; // important
  40.   
  41.   var media_arr=[], media_fnames=[];
  42.   
  43.   // Gets the JSON file for the Tinyboard thread
  44.   async function get_archive_thread() {
  45.     const site_response = await fetch(json_url);
  46.     const JSON_file = await site_response.json();
  47.     console.log(JSON_file); // debug
  48.     retrieve_media(JSON_file);
  49.     download_images();
  50.   }
  51.   
  52.   // Retrieves media from the thread (in JSON format)
  53.   function retrieve_media(thread_obj) {
  54.     
  55.     const posts_exist = thread_obj.posts != undefined;
  56.  
  57.     if (posts_exist) {
  58.       const thread_posts = thread_obj.posts;
  59.       //const post_nums = Object.keys(thread_posts);
  60.       const posts_length = thread_posts.length;
  61.       
  62.       for (let i = 0; i < posts_length; i++) {
  63.         
  64.           if(thread_posts[i].tim != null && thread_posts[i].ext != "deleted"){
  65.             media_arr.push("https://" + tinyboard_site + "/" + thread_board + "/src/" + thread_posts[i].tim + thread_posts[i].ext );
  66.             media_fnames.push(thread_posts[i].filename + thread_posts[i].ext);
  67.           }
  68.         
  69.       }
  70.       
  71.     }
  72.     
  73.   }
  74.     
  75.   async function download_images(){
  76.  
  77.     for (var i=0; i<media_arr.length; i++){
  78.  
  79.       await sleep(download_limit);
  80.       
  81.       console.log(media_arr[i]);
  82.  
  83.       GM_download(media_arr[i], media_fnames[i]) // downloads images
  84.       
  85.     }
  86.   }
  87.   
  88.   GM_registerMenuCommand("Download all thread images individually", get_archive_thread);
  89.   
  90.   var indiv_dl_btn;
  91.   var indiv_dlbtn_elem;
  92.   indiv_dl_btn = document.createElement('a');
  93.   indiv_dl_btn.id = "indiv_btn";
  94.   indiv_dl_btn.innerText = "[Download Images]";
  95.   top_of_thread.append(indiv_dl_btn);
  96.   indiv_dlbtn_elem = document.getElementById("indiv_btn");
  97.   indiv_dl_btn.addEventListener("click", get_archive_thread);
  98.   
  99. })();