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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/465483/1186369/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.                 let originalOpen = xhr.open;
  105.                 let 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 o = function (args) {
  113.                         return originalSend.apply(xhr, args);
  114.                     };
  115.                     let args = arguments;
  116.                     let U = xhr.responseURL == '' ? url : xhr.responseURL;
  117.                     if (U.indexOf('http') == -1) {
  118.                         if (U[0] !== '/') {
  119.                             let pathname = new URL(location.href).pathname;
  120.                             U = pathname + U;
  121.                         }
  122.                         U = location.origin + U;
  123.                     }
  124.                     let pathname = new URL(U).pathname;
  125.                     let callback = XhrMapList.get(pathname);
  126.                     if (callback == null) return o(args);
  127.                     if (callback.length === 0) return o(args);
  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, args);
  145.                     };
  146.                     return o(args);
  147.                 };
  148.                 return xhr;
  149.             }
  150.         });
  151.         contextWindow.XMLHttpRequest = XHRProxy;
  152.     }
  153.  
  154.     (async () => {
  155.         hookFetch();
  156.     })();
  157.     (async () => {
  158.         hookXhr();
  159.     })();
  160.  
  161.     contextWindow['__hookRequest__'] = {
  162.         FetchCallback: {
  163.             add: (pathname, callback) => {
  164.                 let list = FetchMapList.get(pathname) || (FetchMapList.set(pathname, []), FetchMapList.get(pathname));
  165.                 list.push(callback);
  166.                 let index = list.length;
  167.                 return index;
  168.             },
  169.             del: (pathname, index) => {
  170.                 try {
  171.                     let list = FetchMapList.get(pathname);
  172.                     if (list == null) return false;
  173.                     list.splice(index - 1, 1);
  174.                 } catch (e) {
  175.                     new Error(e);
  176.                     return false;
  177.                 }
  178.                 return true;
  179.             }
  180.         },
  181.         XhrCallback: {
  182.             add: (pathname, callback) => {
  183.                 let list = XhrMapList.get(pathname) || (XhrMapList.set(pathname, []), XhrMapList.get(pathname));
  184.                 list.push(callback);
  185.                 let index = list.length;
  186.                 return index;
  187.             },
  188.             del: (pathname, index) => {
  189.                 try {
  190.                     let list = XhrMapList.get(pathname);
  191.                     if (list == null) return false;
  192.                     list.splice(index - 1, 1);
  193.                 } catch (e) {
  194.                     new Error(e);
  195.                     return false;
  196.                 }
  197.                 return true;
  198.             }
  199.         },
  200.         globalVariable: {
  201.             get: (key) => {
  202.                 return globalVariable.get(key);
  203.             },
  204.             getAll: () => {
  205.                 return globalVariable.entries();
  206.             },
  207.             set: (key, value) => {
  208.                 globalVariable.set(key, value);
  209.             },
  210.             getOrDrfault: (key, defaultValue) => {
  211.                 return globalVariable.get(key) || defaultValue;
  212.             }
  213.         }
  214.     };
  215. })();