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hookFetch

only hookFetch

当前为 2023-05-05 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.gf.qytechs.cn/scripts/465483/1186013/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.                                 if (result.done) {
  59.                                     return result;
  60.                                 } else {
  61.                                     let tempObject = deliveryTask(callback, { binary: result.value, args }, 'doing');
  62.                                     if (tempObject && tempObject.binary) {
  63.                                         result.value = tempObject.binary;
  64.                                     }
  65.                                     return result;
  66.                                 }
  67.                             });
  68.                         };
  69.                         return originalReader;
  70.                     };
  71.                     let text = response.text,
  72.                         json = response.json;
  73.                     response.text = () => {
  74.                         return text.apply(response).then((text) => {
  75.                             let _object = deliveryTask(callback, { text, args }, 'done');
  76.                             if (_object && _object.text) {
  77.                                 text = _object.text;
  78.                             }
  79.                             return text;
  80.                         });
  81.                     };
  82.                     response.json = () => {
  83.                         return json.apply(response).then((json) => {
  84.                             let text = JSON.stringify(json);
  85.                             let _object = deliveryTask(callback, { text, args }, 'done');
  86.                             if (_object && _object.text) {
  87.                                 text = _object.text;
  88.                                 return JSON.parse(text);
  89.                             }
  90.                             return json;
  91.                         });
  92.                     };
  93.                 });
  94.             })();
  95.             if (apply == null) {
  96.                 apply = originalFetch.apply(this, args);
  97.             }
  98.             return apply;
  99.         };
  100.     }
  101.  
  102.     function hookXhr() {
  103.         const XHRProxy = new Proxy(contextWindow.XMLHttpRequest, {
  104.             construct(target, args) {
  105.                 const xhr = new target(...args);
  106.                 const originalOpen = xhr.open;
  107.                 const originalSend = xhr.send;
  108.                 xhr.open = function () {
  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;
  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.                             }
  140.                         }
  141.                         onReadyStateChangeOriginal && onReadyStateChangeOriginal.apply(xhr, args);
  142.                     };
  143.                     return o(args);
  144.                 };
  145.                 return xhr;
  146.             }
  147.         });
  148.         globalVariable.set('XMLHttpRequest', contextWindow.XMLHttpRequest);
  149.         contextWindow.XMLHttpRequest = XHRProxy;
  150.     }
  151.  
  152.     (async () => {
  153.         hookFetch();
  154.     })();
  155.     (async () => {
  156.         hookXhr();
  157.     })();
  158.  
  159.     contextWindow['__hookRequest__'] = {
  160.         FetchCallback: {
  161.             add: (pathname, callback) => {
  162.                 let list = FetchMapList.get(pathname) || (FetchMapList.set(pathname, []), FetchMapList.get(pathname));
  163.                 list.push(callback);
  164.                 let index = list.length;
  165.                 return index;
  166.             },
  167.             del: (pathname, index) => {
  168.                 try {
  169.                     let list = FetchMapList.get(pathname);
  170.                     if (list == null) return false;
  171.                     list.splice(index - 1, 1);
  172.                 } catch (e) {
  173.                     new Error(e);
  174.                     return false;
  175.                 }
  176.                 return true;
  177.             }
  178.         },
  179.         XhrCallback: {
  180.             add: (pathname, callback) => {
  181.                 let list = XhrMapList.get(pathname) || (XhrMapList.set(pathname, []), XhrMapList.get(pathname));
  182.                 list.push(callback);
  183.                 let index = list.length;
  184.                 return index;
  185.             },
  186.             del: (pathname, index) => {
  187.                 try {
  188.                     let list = XhrMapList.get(pathname);
  189.                     if (list == null) return false;
  190.                     list.splice(index - 1, 1);
  191.                 } catch (e) {
  192.                     new Error(e);
  193.                     return false;
  194.                 }
  195.                 return true;
  196.             }
  197.         },
  198.         globalVariable: {
  199.             get: (key) => {
  200.                 return globalVariable.get(key);
  201.             },
  202.             getAll: () => {
  203.                 return globalVariable.entries();
  204.             },
  205.             set: (key, value) => {
  206.                 globalVariable.set(key, value);
  207.             },
  208.             getOrDrfault: (key, defaultValue) => {
  209.                 return globalVariable.get(key) || defaultValue;
  210.             }
  211.         }
  212.     };
  213. })();

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