PHP美团外卖开放平台开发记录，IM在线通讯token获取和消息解密！By勤勤学长

token获取：

一开始我还以为，监听哪个店铺的消息，就用哪个店铺的appAuthToken获取长链接的token，但实际上，不管是使用哪个店铺的appAuthToken返回的内容是一样的，同时也意味着，我们可以获取所有已开启即时通讯店铺的所有消息，客户发给商家、商家发给客户。

so，只需要生成一次就可以写死了。我们需要的值connectionToken、connectionId、imSecret。

开发文档：https://developer.meituan.com/openapi#10.4.6

var mtSocket = new WebSocket('wss://wpush.meituan.com/websocket/{connectionId}_WMOPEN/{connectionToken}');

        mtSocket.onopen = function(){
            mtSocket.send('XXX连接成功');
        };

        mtSocket.onmessage = function(e){
            console.log(e.data)
        }

获取到的数据是这样的

文本内容：rQoVHeLTUf+wvmefyRvl6uqIYSOKRCDD1abu8N5Yw9V9M8GaDNwgQgQnvviEcclmaE46mFsa9dhT3JPIFxkXvtd8Hp44WqC02GD6LOluAKUQ33TJQl4n5jFrVdY2c/JCtUEVZ9ik9aIZ30+YW/7sC62Jh0q5O/3FC0gcb8LkZ0mxe5mi2HS/CWCcUA+GarGi2Z1HOt1g/xkZ+aHlftlGWEwHBZcxcddn3SVdnrg9osU=

消息内容是需要解密，所以接收到消息了就把内容提交到接口

var mtSocket = new WebSocket('wss://wpush.meituan.com/websocket/{connectionId}_WMOPEN/{connectionToken}');

        mtSocket.onopen = function(){
            mtSocket.send('XXX连接成功');
        };

        mtSocket.onmessage = function(e){
            console.log(e.data)
            $.ajax({
                url:'{:url("im/websocket")}',
                type:"post",
                data:{
                    data:e.data
                },
                async:false,
                success:function (res) {
                    console.log(res)
                },
                error:function (data) {

                }

            })
        }

    public function websocket()
    {

        
        $data =json_decode(input('data'), true);
        if ($data) {
            $msg_content = \meituan\Im::decrypt($data['msg_content']);
            if (empty($msg_content)) {
                return '解密失败';
            }
            return $msg_content;

        }

    }

<?php
namespace meituan;

class Im {

    protected static $iv = "imSecret";//获取长连接token得到的imSecret

    protected static $encryptKey = "imSecret";//获取长连接token得到的imSecret

    //加密
    public static function encrypt($encryptStr) {
        $localIV = self::$iv;
        $encryptKey = self::encryptKey;

        //Open module
        $module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, $localIV);

        //print "module = $module <br/>" ;

        mcrypt_generic_init($module, $encryptKey, $localIV);

        //Padding
        $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
        $pad = $block - (strlen($encryptStr) % $block); //Compute how many characters need to pad
        $encryptStr .= str_repeat(chr($pad), $pad); // After pad, the str length must be equal to block or its integer multiples

        //encrypt
        $encrypted = mcrypt_generic($module, $encryptStr);

        //Close
        mcrypt_generic_deinit($module);
        mcrypt_module_close($module);

        return base64_encode($encrypted);

    }

    //解密
    public static function decrypt($encryptStr) {
        $localIV = self::$iv;
        $encryptKey = self::$encryptKey;

        //Open module
        $module = @mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, $localIV);

        //print "module = $module <br/>" ;

        @mcrypt_generic_init($module, $encryptKey, $localIV);

        $encryptedData = base64_decode($encryptStr);
        $encryptedData = @mdecrypt_generic($module, $encryptedData);

        return trim ($encryptedData);
    }
}

?>

初步使用结束。

你好，我是勤勤学长。

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