myhook3

myhook3 lib
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/* 0 */
/***/ (function(module, exports, __webpack_require__) {
 
"use strict";
 
 
Object.defineProperty(exports, "__esModule", {
  value: true
});
 
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
 
exports.configEvent = configEvent;
exports.hook = hook;
exports.unHook = unHook;
/*
 * author: wendux
 * email: 824783146@qq.com
 * source code: https://github.com/wendux/Ajax-hook
 */
 
// Save original XMLHttpRequest as _rxhr
var realXhr = "__xhr";
 
var events = exports.events = ['load', 'loadend', 'timeout', 'error', 'readystatechange', 'abort'];
 
function configEvent(event, xhrProxy) {
  var e = {};
  for (var attr in event) {
    e[attr] = event[attr];
  } // xhrProxy instead
  e.target = e.currentTarget = xhrProxy;
  return e;
}
 
function hook(proxy, win) {
  win = win || window;
  // Avoid double hookAjax
  win[realXhr] = win[realXhr] || win.XMLHttpRequest;
 
  win.XMLHttpRequest = function () {
 
    // We shouldn't hookAjax XMLHttpRequest.prototype because we can't
    // guarantee that all attributes are on the prototype。
    // Instead, hooking XMLHttpRequest instance can avoid this problem.
 
    var xhr = new win[realXhr]();
 
    // Generate all callbacks(eg. onload) are enumerable (not undefined).
    for (var i = 0; i < events.length; ++i) {
      var key = 'on' + events[i];
      if (xhr[key] === undefined) xhr[key] = null;
    }
 
    for (var attr in xhr) {
      var type = "";
      try {
        type = _typeof(xhr[attr]); // May cause exception on some browser
      } catch (e) {}
      if (type === "function") {
        // hookAjax methods of xhr, such as `open`、`send` ...
        this[attr] = hookFunction(attr);
      } else {
        Object.defineProperty(this, attr, {
          get: getterFactory(attr),
          set: setterFactory(attr),
          enumerable: true
        });
      }
    }
    var that = this;
    xhr.getProxy = function () {
      return that;
    };
    this.xhr = xhr;
  };
 
  Object.assign(win.XMLHttpRequest, { UNSENT: 0, OPENED: 1, HEADERS_RECEIVED: 2, LOADING: 3, DONE: 4 });
 
  // Generate getter for attributes of xhr
  function getterFactory(attr) {
    return function () {
      var v = this.hasOwnProperty(attr + "_") ? this[attr + "_"] : this.xhr[attr];
      var attrGetterHook = (proxy[attr] || {})["getter"];
      return attrGetterHook && attrGetterHook(v, this) || v;
    };
  }
 
  // Generate setter for attributes of xhr; by this we have an opportunity
  // to hookAjax event callbacks （eg: `onload`） of xhr;
  function setterFactory(attr) {
    return function (v) {
      var xhr = this.xhr;
      var that = this;
      var hook = proxy[attr];
      // hookAjax  event callbacks such as `onload`、`onreadystatechange`...
      if (attr.substring(0, 2) === 'on') {
        that[attr + "_"] = v;
        xhr[attr] = function (e) {
          e = configEvent(e, that);
          var ret = proxy[attr] && proxy[attr].call(that, xhr, e);
          ret || v.call(that, e);
        };
      } else {
        //If the attribute isn't writable, generate proxy attribute
        var attrSetterHook = (hook || {})["setter"];
        v = attrSetterHook && attrSetterHook(v, that) || v;
        this[attr + "_"] = v;
        try {
          // Not all attributes of xhr are writable(setter may undefined).
          xhr[attr] = v;
        } catch (e) {}
      }
    };
  }
 
  // Hook methods of xhr.
  function hookFunction(fun) {
    return function () {
      var args = [].slice.call(arguments);
      if (proxy[fun]) {
        var ret = proxy[fun].call(this, args, this.xhr);
        // If the proxy return value exists, return it directly,
        // otherwise call the function of xhr.
        if (ret) return ret;
      }
      return this.xhr[fun].apply(this.xhr, args);
    };
  }
 
  // Return the real XMLHttpRequest
  return win[realXhr];
}
 
function unHook(win) {
  win = win || window;
  if (win[realXhr]) win.XMLHttpRequest = win[realXhr];
  win[realXhr] = undefined;
}
 
/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {
 
"use strict";
 
 
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.proxy = proxy;
exports.unProxy = unProxy;
 
var _xhrHook = __webpack_require__(0);
 
var eventLoad = _xhrHook.events[0],
    eventLoadEnd = _xhrHook.events[1],
    eventTimeout = _xhrHook.events[2],
    eventError = _xhrHook.events[3],
    eventReadyStateChange = _xhrHook.events[4],
    eventAbort = _xhrHook.events[5]; /*
                                      * author: wendux
                                      * email: 824783146@qq.com
                                      * source code: https://github.com/wendux/Ajax-hook
                                      */
 
var prototype = 'prototype';
 
function proxy(proxy, win) {
  win = win || window;
  if (win['__xhr']) throw "Ajax is already hooked.";
  return proxyAjax(proxy, win);
}
 
function unProxy(win) {
  (0, _xhrHook.unHook)(win);
}
 
function trim(str) {
  return str.replace(/^\s+|\s+$/g, '');
}
 
function getEventTarget(xhr) {
  return xhr.watcher || (xhr.watcher = document.createElement('a'));
}
 
function triggerListener(xhr, name) {
  var xhrProxy = xhr.getProxy();
  var callback = 'on' + name + '_';
  var event = (0, _xhrHook.configEvent)({ type: name }, xhrProxy);
  xhrProxy[callback] && xhrProxy[callback](event);
  var evt;
  if (typeof Event === 'function') {
    evt = new Event(name, { bubbles: false });
  } else {
    // https://stackoverflow.com/questions/27176983/dispatchevent-not-working-in-ie11
    evt = document.createEvent('Event');
    evt.initEvent(name, false, true);
  }
  getEventTarget(xhr).dispatchEvent(evt);
}
 
function Handler(xhr) {
  this.xhr = xhr;
  this.xhrProxy = xhr.getProxy();
}
 
Handler[prototype] = Object.create({
  resolve: function resolve(response) {
    var xhrProxy = this.xhrProxy;
    var xhr = this.xhr;
    xhrProxy.readyState = 4;
    xhr.resHeader = response.headers;
    xhrProxy.response = xhrProxy.responseText = response.response;
    xhrProxy.statusText = response.statusText;
    xhrProxy.status = response.status;
    triggerListener(xhr, eventReadyStateChange);
    triggerListener(xhr, eventLoad);
    triggerListener(xhr, eventLoadEnd);
  },
  reject: function reject(error) {
    this.xhrProxy.status = 0;
    triggerListener(this.xhr, error.type);
    triggerListener(this.xhr, eventLoadEnd);
  }
});
 
function makeHandler(next) {
  function sub(xhr) {
    Handler.call(this, xhr);
  }
 
  sub[prototype] = Object.create(Handler[prototype]);
  sub[prototype].next = next;
  return sub;
}
 
var RequestHandler = makeHandler(function (rq) {
  var xhr = this.xhr;
  rq = rq || xhr.config;
  xhr.withCredentials = rq.withCredentials;
  xhr.open(rq.method, rq.url, rq.async !== false, rq.user, rq.password);
  for (var key in rq.headers) {
    xhr.setRequestHeader(key, rq.headers[key]);
  }
  xhr.send(rq.body);
});
 
var ResponseHandler = makeHandler(function (response) {
  this.resolve(response);
});
 
var ErrorHandler = makeHandler(function (error) {
  this.reject(error);
});
 
function proxyAjax(proxy, win) {
  var onRequest = proxy.onRequest,
      onResponse = proxy.onResponse,
      onError = proxy.onError;
 
  function handleResponse(xhr, xhrProxy) {
    var handler = new ResponseHandler(xhr);
    var ret = {
      response: xhrProxy.response || xhrProxy.responseText, //ie9
      status: xhrProxy.status,
      statusText: xhrProxy.statusText,
      config: xhr.config,
      headers: xhr.resHeader || xhr.getAllResponseHeaders().split('\r\n').reduce(function (ob, str) {
        if (str === "") return ob;
        var m = str.split(":");
        ob[m.shift()] = trim(m.join(':'));
        return ob;
      }, {})
    };
    if (!onResponse) return handler.resolve(ret);
    onResponse(ret, handler);
  }
 
  function onerror(xhr, xhrProxy, error, errorType) {
    var handler = new ErrorHandler(xhr);
    error = { config: xhr.config, error: error, type: errorType };
    if (onError) {
      onError(error, handler);
    } else {
      handler.next(error);
    }
  }
 
  function preventXhrProxyCallback() {
    return true;
  }
 
  function errorCallback(errorType) {
    return function (xhr, e) {
      onerror(xhr, this, e, errorType);
      return true;
    };
  }
 
  function stateChangeCallback(xhr, xhrProxy) {
    if (xhr.readyState === 4 && xhr.status !== 0) {
      handleResponse(xhr, xhrProxy);
    } else if (xhr.readyState !== 4) {
      triggerListener(xhr, eventReadyStateChange);
    }
    return true;
  }
 
  return (0, _xhrHook.hook)({
    onload: preventXhrProxyCallback,
    onloadend: preventXhrProxyCallback,
    onerror: errorCallback(eventError),
    ontimeout: errorCallback(eventTimeout),
    onabort: errorCallback(eventAbort),
    onreadystatechange: function onreadystatechange(xhr) {
      return stateChangeCallback(xhr, this);
    },
    open: function open(args, xhr) {
      var _this = this;
      var config = xhr.config = { headers: {} };
      config.method = args[0];
      config.url = args[1];
      config.async = args[2];
      config.user = args[3];
      config.password = args[4];
      config.xhr = xhr;
      var evName = 'on' + eventReadyStateChange;
      if (!xhr[evName]) {
        xhr[evName] = function () {
          return stateChangeCallback(xhr, _this);
        };
      }
 
      // 如果有请求拦截器，则在调用onRequest后再打开链接。因为onRequest最佳调用时机是在send前，
      // 所以我们在send拦截函数中再手动调用open，因此返回true阻止xhr.open调用。
      //
      // 如果没有请求拦截器，则不用阻断xhr.open调用
      if (onRequest) return true;
    },
    send: function send(args, xhr) {
      var config = xhr.config;
      config.withCredentials = xhr.withCredentials;
      config.body = args[0];
      if (onRequest) {
        // In 'onRequest', we may call XHR's event handler, such as `xhr.onload`.
        // However, XHR's event handler may not be set until xhr.send is called in
        // the user's code, so we use `setTimeout` to avoid this situation
        var req = function req() {
          onRequest(config, new RequestHandler(xhr));
        };
        config.async === false ? req() : setTimeout(req);
        return true;
      }
    },
    setRequestHeader: function setRequestHeader(args, xhr) {
      // Collect request headers
      xhr.config.headers[args[0].toLowerCase()] = args[1];
      if (onRequest) return true;
    },
    addEventListener: function addEventListener(args, xhr) {
      var _this = this;
      if (_xhrHook.events.indexOf(args[0]) !== -1) {
        var handler = args[1];
        getEventTarget(xhr).addEventListener(args[0], function (e) {
          var event = (0, _xhrHook.configEvent)(e, _this);
          event.type = args[0];
          event.isTrusted = true;
          handler.call(_this, event);
        });
        return true;
      }
    },
    getAllResponseHeaders: function getAllResponseHeaders(_, xhr) {
      var headers = xhr.resHeader;
      if (headers) {
        var header = "";
        for (var key in headers) {
          header += key + ': ' + headers[key] + '\r\n';
        }
        return header;
      }
    },
    getResponseHeader: function getResponseHeader(args, xhr) {
      var headers = xhr.resHeader;
      if (headers) {
        return headers[(args[0] || '').toLowerCase()];
      }
    }
  }, win);
}
 
/***/ }),
/* 2 */,
/* 3 */
/***/ (function(module, exports, __webpack_require__) {
 
"use strict";
 
 
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.ah = undefined;
 
var _xhrHook = __webpack_require__(0);
 
var _xhrProxy = __webpack_require__(1);
 
// ah(ajax hook)
/*
 * author: wendux
 * email: 824783146@qq.com
 * source code: https://github.com/wendux/Ajax-hook
 */
 
var ah = exports.ah = {
  proxy: _xhrProxy.proxy,
  unProxy: _xhrProxy.unProxy,
  hook: _xhrHook.hook,
  unHook: _xhrHook.unHook
};
 
/***/ })
/******/ ])));