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hookFetch

only hookFetch

当前为 2023-05-06 提交的版本，查看 最新版本。

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/465483/1186384/hookFetch.js 

  1. (() => {
  2.     var contextWindow = window.unsafeWindow || document.defaultView || window;
  3.     if (contextWindow['__hookRequest__'] != null) {
  4.         return;
  5.     }
  6.     var globalVariable = new Map();
  7.     var FetchMapList = new Map();
  8.     var XhrMapList = new Map();
  9.  
  10.     function deliveryTask(callbackList, _object, period) {
  11.         let newObject = _object;
  12.         for (let i = 0; i < callbackList.length; i++) {
  13.             let tempObject = null;
  14.             try {
  15.                 tempObject = callbackList[i](newObject, period);
  16.             } catch (e) {
  17.                 new Error(e);
  18.             }
  19.             if (tempObject == null) {
  20.                 continue;
  21.             }
  22.             newObject = tempObject;
  23.         }
  24.         return newObject;
  25.     }
  26.  
  27.     function hookFetch() {
  28.         const originalFetch = contextWindow.fetch;
  29.         globalVariable.set('Fetch', originalFetch);
  30.         contextWindow.fetch = (...args) => {
  31.             let U = args[0];
  32.             if (U.indexOf('http') == -1) {
  33.                 if (U[0] !== '/') {
  34.                     let pathname = new URL(location.href).pathname;
  35.                     U = pathname + U;
  36.                 }
  37.                 U = location.origin + U;
  38.             }
  39.             let apply = null;
  40.             (() => {
  41.                 let url = new URL(U),
  42.                     pathname = url.pathname,
  43.                     callback = FetchMapList.get(pathname);
  44.                 if (callback == null) return;
  45.                 if (callback.length === 0) return;
  46.                 let newObject = deliveryTask(callback, { args }, 'preRequest');
  47.                 if (newObject && newObject.args) {
  48.                     args = newObject.args;
  49.                 }
  50.                 apply = originalFetch.apply(this, args);
  51.                 apply.then((response) => {
  52.                     let originalGetReader = response.body.getReader;
  53.                     response.body.getReader = function () {
  54.                         let originalReader = originalGetReader.apply(this, arguments);
  55.                         let originalRead = originalReader.read;
  56.                         originalReader.read = function () {
  57.                             return originalRead.apply(this, arguments).then(function (result) {
  58.                                 let tempObject = deliveryTask(callback, { result, args }, 'doing');
  59.                                 if (tempObject && tempObject.result) {
  60.                                     result = tempObject.result;
  61.                                 }
  62.                                 return result;
  63.                             });
  64.                         };
  65.                         return originalReader;
  66.                     };
  67.                     let text = response.text,
  68.                         json = response.json;
  69.                     response.text = () => {
  70.                         return text.apply(response).then((text) => {
  71.                             let _object = deliveryTask(callback, { text, args }, 'done');
  72.                             if (_object && _object.text) {
  73.                                 text = _object.text;
  74.                             }
  75.                             return text;
  76.                         });
  77.                     };
  78.                     response.json = () => {
  79.                         return json.apply(response).then((json) => {
  80.                             let text = JSON.stringify(json);
  81.                             let _object = deliveryTask(callback, { text, args }, 'done');
  82.                             if (_object && _object.text) {
  83.                                 text = _object.text;
  84.                                 return JSON.parse(text);
  85.                             }
  86.                             return json;
  87.                         });
  88.                     };
  89.                 });
  90.             })();
  91.             if (apply == null) {
  92.                 apply = originalFetch.apply(this, args);
  93.             }
  94.             return apply;
  95.         };
  96.     }
  97.  
  98.     function hookXhr() {
  99.         const oldXHR = contextWindow.XMLHttpRequest;
  100.         globalVariable.set('XMLHttpRequest', oldXHR);
  101.         const XHRProxy = new Proxy(contextWindow.XMLHttpRequest, {
  102.             construct(target, args) {
  103.                 let xhr = new target(...args);
  104.                 const originalOpen = xhr.open;
  105.                 const originalSend = xhr.send;
  106.                 let url = '';
  107.                 xhr.open = function () {
  108.                     url = arguments[1];
  109.                     return originalOpen.apply(xhr, arguments);
  110.                 };
  111.                 xhr.send = function () {
  112.                     let args = arguments;
  113.                     let U = xhr.responseURL == '' ? url : xhr.responseURL;
  114.                     if (U.indexOf('http') == -1) {
  115.                         if (U[0] !== '/') {
  116.                             let pathname = new URL(location.href).pathname;
  117.                             U = pathname + U;
  118.                         }
  119.                         U = location.origin + U;
  120.                     }
  121.                     let pathname = new URL(U).pathname;
  122.                     let callback = XhrMapList.get(pathname);
  123.                     let skip = false;
  124.                     if (callback == null || callback.length === 0) {
  125.                         skip = true;
  126.                     }
  127.                     if (!skip) {
  128.                         let newObject = deliveryTask(callback, { args }, 'preRequest');
  129.                         if (newObject && newObject.args) {
  130.                             args = newObject.args;
  131.                         }
  132.                         const onReadyStateChangeOriginal = xhr.onreadystatechange;
  133.                         xhr.onreadystatechange = function () {
  134.                             if (xhr.readyState === 4 && xhr.status === 200) {
  135.                                 let text = xhr.responseText;
  136.                                 let newObject = deliveryTask(callback, { text, args }, 'done');
  137.                                 if (newObject && newObject.text) {
  138.                                     xhr.responseText = newObject.text;
  139.                                     if (xhr.responseText !== newObject.text) {
  140.                                         debugger;
  141.                                     }
  142.                                 }
  143.                             }
  144.                             onReadyStateChangeOriginal && onReadyStateChangeOriginal.apply(xhr, arguments);
  145.                         };
  146.                     }
  147.                     return originalSend.apply(xhr, arguments);
  148.                 };
  149.                 return xhr;
  150.             }
  151.         });
  152.         contextWindow.XMLHttpRequest = XHRProxy;
  153.     }
  154.  
  155.     hookFetch();
  156.     hookXhr();
  157.  
  158.     contextWindow['__hookRequest__'] = {
  159.         FetchCallback: {
  160.             add: (pathname, callback) => {
  161.                 let list = FetchMapList.get(pathname) || (FetchMapList.set(pathname, []), FetchMapList.get(pathname));
  162.                 list.push(callback);
  163.                 let index = list.length;
  164.                 return index;
  165.             },
  166.             del: (pathname, index) => {
  167.                 try {
  168.                     let list = FetchMapList.get(pathname);
  169.                     if (list == null) return false;
  170.                     list.splice(index - 1, 1);
  171.                 } catch (e) {
  172.                     new Error(e);
  173.                     return false;
  174.                 }
  175.                 return true;
  176.             }
  177.         },
  178.         XhrCallback: {
  179.             add: (pathname, callback) => {
  180.                 let list = XhrMapList.get(pathname) || (XhrMapList.set(pathname, []), XhrMapList.get(pathname));
  181.                 list.push(callback);
  182.                 let index = list.length;
  183.                 return index;
  184.             },
  185.             del: (pathname, index) => {
  186.                 try {
  187.                     let list = XhrMapList.get(pathname);
  188.                     if (list == null) return false;
  189.                     list.splice(index - 1, 1);
  190.                 } catch (e) {
  191.                     new Error(e);
  192.                     return false;
  193.                 }
  194.                 return true;
  195.             }
  196.         },
  197.         globalVariable: {
  198.             get: (key) => {
  199.                 return globalVariable.get(key);
  200.             },
  201.             getAll: () => {
  202.                 return globalVariable.entries();
  203.             },
  204.             set: (key, value) => {
  205.                 globalVariable.set(key, value);
  206.             },
  207.             getOrDrfault: (key, defaultValue) => {
  208.                 return globalVariable.get(key) || defaultValue;
  209.             }
  210.         }
  211.     };
  212. })();