Egret的http请求封装

Http_egret.ts

class Http {
	public static Inst(): Http {
		if (null == Http._inst) {
			Http._inst = new Http();
		}
		return Http._inst;
	}
	private static _inst: Http;

	public constructor() {
	}

	private token: string;

	public Get(url: string, params: any, listener: Function, thisObject: any): void {
		this.req(egret.HttpMethod.GET, url, params, listener, thisObject);
	}
	public Post(url: string, params: any, listener: Function, thisObject: any): void {
		this.req(egret.HttpMethod.POST, url, params, listener, thisObject);
	}
	private req(method: string, url: string, params: any, listener: Function, thisObject: any) {
		var request = new egret.HttpRequest();
		request.responseType = egret.HttpResponseType.TEXT;
		var finalUrl = url;
		var query = ""
		if (null != params) {
			query += Object.keys(params)
				.map(k => encodeURIComponent(k) + '=' + encodeURIComponent(params[k]))
				.join('&')
		}
		if (undefined != this.token) {
			if ("" == query) {
				query = "token=" + this.token;
			} else {
				query += "&token=" + this.token;
			}
		}
		if ("" == query) {
			request.open(url, method);
		} else {
			request.open(url + "?" + query, method);
		}
		var httpObj = this;
		request.addEventListener(egret.Event.COMPLETE, function (event: egret.Event): void {
			var request = <egret.HttpRequest>event.currentTarget;
			var obj = JSON.parse(request.response)
			if (null == obj) {
				listener.call(thisObject, -2, null, null)
			} else {
				console.log(obj);
				if (undefined != obj.t) {
					httpObj.token = obj.t;
				}
				listener.call(thisObject, obj.code, obj.data, obj.err)
			}
		}, null);
		request.addEventListener(egret.IOErrorEvent.IO_ERROR, this.onGetIOError, this);
		request.addEventListener(egret.ProgressEvent.PROGRESS, this.onGetProgress, this);

		request.send();
	}

	private onGetIOError(event: egret.IOErrorEvent): void {
		console.log("get error : " + event);
	}
	private onGetProgress(event: egret.ProgressEvent): void {
		// console.log("get progress : " + Math.floor(100 * event.bytesLoaded / event.bytesTotal) + "%");
	}
}