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COCOSCREATOR(TS)之HTTP通信-创新互联
一 : XMLHttpRequest的封装
export class HttpCell{
private _xhr : XMLHttpRequest = null;
private _server_url : string = null;
private _callback : ( $isSucc : boolean , _http : HttpCell ,$data : any ) => void = null;
private _timeout : number = null;
private _formData : FormData = null;
private _method : string = null;
public constructor(){
this._xhr = new XMLHttpRequest();
this.listener2Handler( true );
}
public abortListener() : void{
this.listener2Handler( false );
this._server_url = null;
this._callback = null;
}
public reset : Function = () : void => {
this.listener2Handler( true );
}
private onComplete( $isSucc : boolean , $data : any , $target : HttpCell ) : void {
if( this === $target ){
this._callback( $isSucc , this , $data );
}
}
private listener2Handler : Function = ( $isAdd : boolean ) : void => {
if( $isAdd ){
ListenerManager.getInstance().add( ListenerType.NetHttpComplete , this , this.onComplete.bind(this) );
this._xhr.onload = ( ev: Event) : any => {
if( this._xhr.status == 200 || this._xhr.status == 304 ){
let $res : any = 'response' in this._xhr ? this._xhr.response : this._xhr.responseText;
cc.warn(`[Http] error ${$res}`);
}
}
if( this._timeout ){
this._xhr.ontimeout = ( ev: ProgressEvent ) : any => {
cc.warn(`[Http] error timeout!`);
}
}
this._xhr.onerror = (ev: ErrorEvent) : any => {
cc.warn( `[Http] error ${ev.message}` );
}
this._xhr.onreadystatechange = () : void => {
if (this._xhr.readyState == XMLHttpRequest.DONE && ( this._xhr.status >= 200 && this._xhr.status < 400) ) {
if( this._xhr.status == 200 ){
ListenerManager.getInstance().trigger( ListenerType.NetHttpComplete , true , this._xhr.response , this);
}else{
ListenerManager.getInstance().trigger( ListenerType.NetHttpComplete , false , this._xhr.status , this );
}
this._xhr.abort();
}
}
}else{
if( this._xhr.onload ) this._xhr.onload = null;
if( this._xhr.ontimeout ) this._xhr.ontimeout = null;
if( this._xhr.onerror ) this._xhr.onerror = null;
if( this._xhr.onreadystatechange ) this._xhr.onreadystatechange = null;
ListenerManager.getInstance().remove( ListenerType.NetHttpComplete , this , this.onComplete.bind(this) );
}
}
public send : Function = (
$server_url : string ,
$data : object ,
$callback : ( $isSucc : boolean , _http : HttpCell ,$data : any ) => void,
$dataFormat : TYPE_HTTP4DATAFORMAT = TYPE_HTTP4DATAFORMAT.___TEXT___ ,
$isGet : boolean = true,
$timeout : number = null
) : void => {
this._server_url = $server_url;
this._callback = $callback;
this._timeout = $timeout;
this._method = $isGet ? "GET" : "POST";
if( $timeout ) this._xhr.timeout = $timeout;
switch( $dataFormat ){
case TYPE_HTTP4DATAFORMAT.___TEXT___: this._xhr.responseType = "text";break;
case TYPE_HTTP4DATAFORMAT.___BINARY___ : this._xhr.responseType = "arraybuffer";break;
case TYPE_HTTP4DATAFORMAT.___JSON___ : this._xhr.responseType = "json";break;
}
if( $data ){
this._formData = new FormData();
for( let $key of Object.keys($data) ){
this._formData.append( $key + `` , $data[$key] + `` );
}
}else{
this._formData = null;
}
this.start();
}
private start : Function = () : void => {
this._xhr.open( this._method , this._server_url , true );
this._xhr.setRequestHeader( "Content-Type", "application/x-www-form-urlencoded" );
this._xhr.send( this._formData );
}
public tryAgain : Function = () : void => {
this.start();
}
public destory() : void{
this.abortListener();
this._xhr = null;
}
}PS :
Ⅰ,onreadystatechange : 当HTTP请求状态改变时触发
①,status 状态
②,response 得到后端返回的数据
Ⅱ,tryAgain : 当Http请求出现异常时 , 可以请求tryAgain重新请求一次
Ⅲ,send方法
①, 参数 $data = { name="123" , pwd="123456" }
二 : 数据类型
export enum TYPE_HTTP4DATAFORMAT{
___TEXT___ = 1,
___BINARY___ = 2,
___JSON___ = 3
}三 : 封装Http管理类
export class HttpNetManager{
private static _instance : HttpNetManager = null;
public static get Instance() : HttpNetManager{
if( !HttpNetManager._instance )
HttpNetManager._instance = new HttpNetManager();
return HttpNetManager._instance;
}
private _list_cell : PoolObjects = null;
private _cur_loading : Map = null;
private readonly _try_count : number = 3;
private readonly _try_wait_during : number = 350;
private constructor(){
this._list_cell = new PoolObjects(3);
this._cur_loading = new Map();
}
public send : Function = (
$server_url : string ,
$data : object ,
$callback : ( $isSucc : boolean ,$data : any ) => void,
$dataFormat : TYPE_HTTP4DATAFORMAT = TYPE_HTTP4DATAFORMAT.___TEXT___ ,
$isGet : boolean = true,
$isTry : boolean = true,
$timeout : number = null
) : void => {
let $modle : IHttp_Data = this._list_cell.Free;
let $cell : HttpCell = null;
if( !$modle ){
$cell = new HttpCell();
$modle = {
_http : $cell ,
_isTry : $isTry ,
_callback : $callback,
_cur_index : 0
};
this._list_cell.addNew( $modle );
}else{
$cell = $modle._http;
$modle._isTry = $isTry;
$modle._callback = $callback;
$modle._cur_index = 0;
$cell.reset();
}
this._cur_loading.set( $cell , $modle );
$cell.send(
$server_url,
$data,
this.onHttpCallback.bind(this),
$dataFormat,
$isGet,
$timeout
);
}
private onHttpCallback : Function = ( $isSucc : boolean , _http : HttpCell ,$data : any ) : void => {
let $model : IHttp_Data = this._cur_loading.get( _http );
const $complete : Function = () : void =>{
$model._callback( $isSucc , $data );
this._cur_loading.delete( _http );
_http.abortListener();
if( !this._list_cell.reInsert( $model ) ){
_http.destory();
}
}
if( !$isSucc ){
if( $model._isTry && $model._cur_index < this._try_count ){
$model._cur_index ++;
if( this._try_wait_during > 0 ){
setTimeout( () : void => {
_http.tryAgain();
} , this._try_wait_during );
}else{
_http.tryAgain();
}
}else{
$complete();
}
}else{
$complete();
}
}
} PS:
Ⅰ,_try_count参数 : 如果Http请求失败 , 会再次请求几次
Ⅱ,_try_wait_during: 等待多少毫秒后再次进行HTTP请求
Ⅲ,通过send发送Http请求 , 其参数$callback用来返回数据
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本文题目：COCOSCREATOR(TS)之HTTP通信-创新互联
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