?? ?? ???? ?????? ??? ? ??? ?? json ?? jsonp ??? ??? ??? ??? ?? ???? json ??? ??? ?? ??? ??? ??? ???? ???? ?? ?? ??? ???? ???.

1 beforeSend? ???? ?? ????? ???. beforesend? ?? ?? ??? ???? ?????. ??? ??? ?? ?????.

/**
 * (non-PHPdoc)
 * @see \yii\base\Object::init()
 */
public function init()
{       
    parent::init();	//綁定beforeSend事件，更改數(shù)據(jù)輸出格式
    Yii::$app->getResponse()->on(Response::EVENT_BEFORE_SEND, [$this, 'beforeSend']);
}

#???? #

2. ?? ?? ?? ?? ???? ???. ?? ???? ??? ?? ?? ??? ????.

1>??? ?? ?? ??

2>????? Json ???? ?????

3> ????? ?? ? $_GET['callback'] ????? ???? Jsonp ??? ?????

# ????#4> ??? ??? ?? ???? {"success":true,"data":{...}}

5>?? ??? ??? ?? ???? { "??":false,"???":{"??": "?? ? ??","message":"???? ?? ? ????.","code":0,"status":404}}

#?? ??#6>???? ??? ??? ????:

/**
     * 更改數(shù)據(jù)輸出格式
     * 默認(rèn)情況下輸出Json數(shù)據(jù)
     * 如果客戶端請(qǐng)求時(shí)有傳遞$_GET['callback']參數(shù)，輸入Jsonp格式
     * 請(qǐng)求正確時(shí)數(shù)據(jù)為  {"success":true,"data":{...}}
     * 請(qǐng)求錯(cuò)誤時(shí)數(shù)據(jù)為  {"success":false,"data":{"name":"Not Found","message":"頁(yè)面未找到。","code":0,"status":404}}
     * @param \yii\base\Event $event
     */
    public function beforeSend($event)
    {        /* @var $response \yii\web\Response */
        $response = $event->sender;
        $isSuccessful = $response->isSuccessful;        if ($response->statusCode>=400) {            //異常處理
            if (true && $exception = Yii::$app->getErrorHandler()->exception) {
                $response->data = $this->convertExceptionToArray($exception);
            }            //Model出錯(cuò)了
            if ($response->statusCode==422) {
                $messages=[];                foreach ($response->data as $v) {
                    $messages[] = $v['message'];
                }                //請(qǐng)求錯(cuò)誤時(shí)數(shù)據(jù)為  {"success":false,"data":{"name":"Not Found","message":"頁(yè)面未找到。","code":0,"status":404}}
                $response->data = [                    'name'=> 'valide error',                    'message'=> implode("  ", $messages),                    'info'=>$response->data
                ];
            }
            $response->statusCode = 200;
        }        elseif ($response->statusCode>=300) {
            $response->statusCode = 200;
            $response->data = $this->convertExceptionToArray(new ForbiddenHttpException(Yii::t('yii', 'Login Required')));
        }        //請(qǐng)求正確時(shí)數(shù)據(jù)為  {"success":true,"data":{...}}
        $response->data = [            'success' => $isSuccessful,            'data' => $response->data,
        ];
        $response->format = Response::FORMAT_JSON;
        \Yii::$app->getResponse()->getHeaders()->set('Access-Control-Allow-Origin', '*');
        \Yii::$app->getResponse()->getHeaders()->set('Access-Control-Allow-Credentials', 'true');       //jsonp 格式輸出
        if (isset($_GET['callback'])) {
            $response->format = Response::FORMAT_JSONP;
            $response->data = [                'callback' => $_GET['callback'],                'data'=>$response->data,
            ];
        }
    }

#?? ??#

3. ?? ??? ?? ???? ?? ??? ??? ? ??? ?? ?? ???? ???? ???. ???? ??? ??? ????:

/**
     * 將異常轉(zhuǎn)換為array輸出
     * @see \yii\web\ErrorHandle
     * @param \Exception $exception
     * @return multitype:string NULL Ambigous <string, \yii\base\string> \yii\web\integer \yii\db\array multitype:string NULL Ambigous <string, \yii\base\string> \yii\web\integer \yii\db\array
     */
    protected function convertExceptionToArray($exception)
    {        if (!YII_DEBUG && !$exception instanceof UserException && !$exception instanceof HttpException) {
            $exception = new HttpException(500, Yii::t(&#39;yii&#39;, &#39;An internal server error occurred.&#39;));
        }
        $array = [            &#39;name&#39; => ($exception instanceof Exception || $exception instanceof ErrorException) ? $exception->getName() : &#39;Exception&#39;,            &#39;message&#39; => $exception->getMessage(),            &#39;code&#39; => $exception->getCode(),
        ];        if ($exception instanceof HttpException) {
            $array[&#39;status&#39;] = $exception->statusCode;
        }        if (YII_DEBUG) {
            $array[&#39;type&#39;] = get_class($exception);            if (!$exception instanceof UserException) {
                $array[&#39;file&#39;] = $exception->getFile();
                $array[&#39;line&#39;] = $exception->getLine();
                $array[&#39;stack-trace&#39;] = explode("\n", $exception->getTraceAsString());                if ($exception instanceof \yii\db\Exception) {
                    $array[&#39;error-info&#39;] = $exception->errorInfo;
                }
            }
        }        if (($prev = $exception->getPrevious()) !== null) {
            $array[&#39;previous&#39;] = $this->convertExceptionToArray($prev);
        }        return $array;
    }

#???? #??, ?? ??? ??? ???? ??? ?? API ?????? ???? ?????? ???? ???? ???? ?? ??? ?? ??? ??? ????. # ????#

??: "#?? ??#Yii2.0 ????? ?? ?? ??? ????

》

? ??? Yii2 API ????? ?? ?? Json ? jsonp ?? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!