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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/465483/1186016/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 doingDone = result.done;
  62.                                     let tempObject = deliveryTask(callback, { doingDone, binary: result.value, args }, 'doing');
  63.                                     if (tempObject && tempObject.binary) {
  64.                                         result.value = tempObject.binary;
  65.                                     }
  66.                                     return result;
  67.                                 }
  68.                             });
  69.                         };
  70.                         return originalReader;
  71.                     };
  72.                     let text = response.text,
  73.                         json = response.json;
  74.                     response.text = () => {
  75.                         return text.apply(response).then((text) => {
  76.                             let _object = deliveryTask(callback, { text, args }, 'done');
  77.                             if (_object && _object.text) {
  78.                                 text = _object.text;
  79.                             }
  80.                             return text;
  81.                         });
  82.                     };
  83.                     response.json = () => {
  84.                         return json.apply(response).then((json) => {
  85.                             let text = JSON.stringify(json);
  86.                             let _object = deliveryTask(callback, { text, args }, 'done');
  87.                             if (_object && _object.text) {
  88.                                 text = _object.text;
  89.                                 return JSON.parse(text);
  90.                             }
  91.                             return json;
  92.                         });
  93.                     };
  94.                 });
  95.             })();
  96.             if (apply == null) {
  97.                 apply = originalFetch.apply(this, args);
  98.             }
  99.             return apply;
  100.         };
  101.     }
  102.  
  103.     function hookXhr() {
  104.         const XHRProxy = new Proxy(contextWindow.XMLHttpRequest, {
  105.             construct(target, args) {
  106.                 const xhr = new target(...args);
  107.                 const originalOpen = xhr.open;
  108.                 const originalSend = xhr.send;
  109.                 xhr.open = function () {
  110.                     return originalOpen.apply(xhr, arguments);
  111.                 };
  112.                 xhr.send = function () {
  113.                     let o = function (args) {
  114.                         return originalSend.apply(xhr, args);
  115.                     };
  116.                     let args = arguments;
  117.                     let U = xhr.responseURL;
  118.                     if (U.indexOf('http') == -1) {
  119.                         if (U[0] !== '/') {
  120.                             let pathname = new URL(location.href).pathname;
  121.                             U = pathname + U;
  122.                         }
  123.                         U = location.origin + U;
  124.                     }
  125.                     let pathname = new URL(U).pathname;
  126.                     let callback = XhrMapList.get(pathname);
  127.                     if (callback == null) return o(args);
  128.                     if (callback.length === 0) return o(args);
  129.                     let newObject = deliveryTask(callback, { args }, 'preRequest');
  130.                     if (newObject && newObject.args) {
  131.                         args = newObject.args;
  132.                     }
  133.                     const onReadyStateChangeOriginal = xhr.onreadystatechange;
  134.                     xhr.onreadystatechange = function () {
  135.                         if (xhr.readyState === 4 && xhr.status === 200) {
  136.                             let text = xhr.responseText;
  137.                             let newObject = deliveryTask(callback, { text, args }, 'done');
  138.                             if (newObject && newObject.text) {
  139.                                 xhr.responseText = newObject.text;
  140.                             }
  141.                         }
  142.                         onReadyStateChangeOriginal && onReadyStateChangeOriginal.apply(xhr, args);
  143.                     };
  144.                     return o(args);
  145.                 };
  146.                 return xhr;
  147.             }
  148.         });
  149.         globalVariable.set('XMLHttpRequest', contextWindow.XMLHttpRequest);
  150.         contextWindow.XMLHttpRequest = XHRProxy;
  151.     }
  152.  
  153.     (async () => {
  154.         hookFetch();
  155.     })();
  156.     (async () => {
  157.         hookXhr();
  158.     })();
  159.  
  160.     contextWindow['__hookRequest__'] = {
  161.         FetchCallback: {
  162.             add: (pathname, callback) => {
  163.                 let list = FetchMapList.get(pathname) || (FetchMapList.set(pathname, []), FetchMapList.get(pathname));
  164.                 list.push(callback);
  165.                 let index = list.length;
  166.                 return index;
  167.             },
  168.             del: (pathname, index) => {
  169.                 try {
  170.                     let list = FetchMapList.get(pathname);
  171.                     if (list == null) return false;
  172.                     list.splice(index - 1, 1);
  173.                 } catch (e) {
  174.                     new Error(e);
  175.                     return false;
  176.                 }
  177.                 return true;
  178.             }
  179.         },
  180.         XhrCallback: {
  181.             add: (pathname, callback) => {
  182.                 let list = XhrMapList.get(pathname) || (XhrMapList.set(pathname, []), XhrMapList.get(pathname));
  183.                 list.push(callback);
  184.                 let index = list.length;
  185.                 return index;
  186.             },
  187.             del: (pathname, index) => {
  188.                 try {
  189.                     let list = XhrMapList.get(pathname);
  190.                     if (list == null) return false;
  191.                     list.splice(index - 1, 1);
  192.                 } catch (e) {
  193.                     new Error(e);
  194.                     return false;
  195.                 }
  196.                 return true;
  197.             }
  198.         },
  199.         globalVariable: {
  200.             get: (key) => {
  201.                 return globalVariable.get(key);
  202.             },
  203.             getAll: () => {
  204.                 return globalVariable.entries();
  205.             },
  206.             set: (key, value) => {
  207.                 globalVariable.set(key, value);
  208.             },
  209.             getOrDrfault: (key, defaultValue) => {
  210.                 return globalVariable.get(key) || defaultValue;
  211.             }
  212.         }
  213.     };
  214. })();

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