[adapters] 增加小游戏适配部分源码

adapters/platforms/baidu/wrapper/builtin/XMLHttpRequest.js

@@ -0,0 +1,229 @@
+/* eslint-disable */
+import EventTarget from './EventTarget.js'
+
+const _url = new WeakMap()
+const _method = new WeakMap()
+const _requestHeader = new WeakMap()
+const _responseHeader = new WeakMap()
+const _requestTask = new WeakMap()
+
+let fs;
+
+function _triggerEvent(type, event = {}) {
+    event.target = event.target || this
+
+    if (typeof this[`on${type}`] === 'function') {
+        this[`on${type}`].call(this, event)
+    }
+}
+
+function _changeReadyState(readyState, event = {}) {
+    this.readyState = readyState
+
+    event.readyState = readyState;
+
+    _triggerEvent.call(this, 'readystatechange', event)
+}
+
+function _isRelativePath(url) {
+    return !(/^(http|https|ftp|wxfile):\/\/.*/i.test(url));
+}
+
+export default class XMLHttpRequest extends EventTarget {
+
+    constructor() {
+        super();
+
+        /*
+         * TODO 这一批事件应该是在 XMLHttpRequestEventTarget.prototype 上面的
+         */
+        this.onabort = null
+        this.onerror = null
+        this.onload = null
+        this.onloadstart = null
+        this.onprogress = null
+        this.ontimeout = null
+        this.onloadend = null
+
+        this.onreadystatechange = null
+        this.readyState = 0
+        this.response = null
+        this.responseText = null
+        this.responseType = ''
+        this.responseXML = null
+        this.status = 0
+        this.statusText = ''
+        this.upload = {}
+        this.withCredentials = false
+
+        _requestHeader.set(this, {
+            'content-type': 'application/x-www-form-urlencoded'
+        })
+        _responseHeader.set(this, {})
+    }
+
+    abort() {
+        const myRequestTask = _requestTask.get(this)
+
+        if (myRequestTask) {
+            myRequestTask.abort()
+        }
+    }
+
+    getAllResponseHeaders() {
+        const responseHeader = _responseHeader.get(this)
+
+        return Object.keys(responseHeader).map((header) => {
+            return `${header}: ${responseHeader[header]}`
+        }).join('\n')
+    }
+
+    getResponseHeader(header) {
+        return _responseHeader.get(this)[header]
+    }
+
+    open(method, url /* async, user, password 这几个参数在小程序内不支持*/ ) {
+        _method.set(this, method)
+        _url.set(this, url)
+        _changeReadyState.call(this, XMLHttpRequest.OPENED)
+    }
+
+    overrideMimeType() {}
+
+    send(data = '') {
+        if (this.readyState !== XMLHttpRequest.OPENED) {
+            throw new Error("Failed to execute 'send' on 'XMLHttpRequest': The object's state must be OPENED.")
+        } else {
+            const url = _url.get(this)
+            const header = _requestHeader.get(this)
+            const responseType = this.responseType
+
+            const relative = _isRelativePath(url)
+            let encoding;
+
+            if (responseType === 'arraybuffer') {
+                // encoding = 'binary'
+            } else {
+                encoding = 'utf8'
+            }
+
+            delete this.response;
+            this.response = null;
+
+            const onSuccess = ({ data, statusCode, header }) => {
+                statusCode = statusCode === undefined ? 200 : statusCode;
+                if (typeof data !== 'string' && !(data instanceof ArrayBuffer)) {
+                    try {
+                        data = JSON.stringify(data)
+                    } catch (e) {
+                        data = data
+                    }
+                }
+
+                this.status = statusCode
+                if (header) {
+                    _responseHeader.set(this, header)
+                }
+                _triggerEvent.call(this, 'loadstart')
+                _changeReadyState.call(this, XMLHttpRequest.HEADERS_RECEIVED)
+                _changeReadyState.call(this, XMLHttpRequest.LOADING)
+
+                this.response = data
+
+                if (data instanceof ArrayBuffer) {
+                    Object.defineProperty(this, 'responseText', {
+                        enumerable: true,
+                        configurable: true,
+                        get: function() {
+                            throw "InvalidStateError : responseType is " + this.responseType;
+                        }
+                    });
+                } else {
+                    Object.defineProperty(this, 'responseText', {
+                        enumerable: true,
+                        configurable: true,
+                        value: data
+                    });
+                }
+                _changeReadyState.call(this, XMLHttpRequest.DONE)
+                _triggerEvent.call(this, 'load')
+                _triggerEvent.call(this, 'loadend')
+            }
+
+            const onFail = ({ errMsg }) => {
+                // TODO 规范错误
+
+                if (errMsg.indexOf('abort') !== -1) {
+                    _triggerEvent.call(this, 'abort')
+                } else {
+                    _triggerEvent.call(this, 'error', {
+                        message: errMsg
+                    })
+                }
+                _triggerEvent.call(this, 'loadend')
+
+                if (relative) {
+                    // 用户即使没监听error事件, 也给出相应的警告
+                    console.warn(errMsg)
+                }
+            }
+
+            if (relative) {
+                var options = {
+                    'filePath': url,
+                    'success': onSuccess,
+                    'fail': onFail
+                }
+                if (encoding) {
+                    options['encoding'] = encoding;
+                }
+                if (!fs) {
+                    fs = swan.getFileSystemManager();
+                }
+                fs.readFile(options)
+                return
+            }
+
+            swan.request({
+                data,
+                url: url,
+                method: _method.get(this),
+                header: header,
+                responseType: responseType,
+                success: onSuccess,
+                fail: onFail
+            })
+        }
+    }
+
+    setRequestHeader(header, value) {
+        const myHeader = _requestHeader.get(this)
+
+        myHeader[header] = value
+        _requestHeader.set(this, myHeader)
+    }
+
+    addEventListener(type, listener) {
+        if (typeof listener !== 'function') {
+            return;
+        }
+
+        this['on' + type] = (event = {}) => {
+            event.target = event.target || this
+            listener.call(this, event)
+        }
+    }
+
+    removeEventListener(type, listener) {
+        if (this['on' + type] === listener) {
+            this['on' + type] = null;
+        }
+    }
+}
+
+// TODO 没法模拟 HEADERS_RECEIVED 和 LOADING 两个状态
+XMLHttpRequest.UNSEND = 0
+XMLHttpRequest.OPENED = 1
+XMLHttpRequest.HEADERS_RECEIVED = 2
+XMLHttpRequest.LOADING = 3
+XMLHttpRequest.DONE = 4