在没有cognito的地区使用AWS服务（如物联网）

Question

我正在研究使用AWS IOT让我们的硬件与用户手机通信。为此，我们使用react-nate-paho-mqtt库。

我会在守则前简单解释：

>

从ap-东北-1（东京）中的认知联邦标识检索令牌，因为那里有认知/联邦标识

使用该令牌登录ap-东南-1（新加坡）的aws IOT

失败：错误：AMQJS0007E套接字错误：未知套接字错误。

生成的带有sigV4签名的mqttendpoint如下所示：

wss://a2mt3pd9aiue3c.iot.ap-southeast-1.amazonaws.com/mqtt?X-Amz算法=AWS4-HMAC-SHA256

代码片段如下所示：

    fetch('https://xxx.execute-api.ap-northeast-1.amazonaws.com/dev/app/connect', { // retrieve app token from ap-northeast-1 cognito
     method: 'POST',
     headers: {
    'Accept': 'application/json',
    'Content-Type': 'application/json',
    },
      body: JSON.stringify({"data": {"coreUserId": 100, "companyId": 1, 
      "brandId": 2, "hotelId": 3, "roomId": 4}})
     })
     .then((response) => response.json())
     .then((responseJson) => {

    console.warn("resnpose json is : ", responseJson)
    AWS.config.credentials = new AWS.CognitoIdentityCredentials({
      IdentityPoolId: AppConfig.identityPoolId,
      IdentityId: responseJson.message.cognitoIdentityId,
      Logins: {
        'cognito-identity.amazonaws.com': responseJson.message.token
      }
    });
    AWS.config.credentials.get((err) => {

      if (err) {
        console.error(err)
      }
      console.warn("AWS.config.credentials --> ", AWS.config.credentials)

      var ioturl = this.getSignedUrl(AppConfig.iotEndpoint, AppConfig.region, AWS.config.credentials);
      const client = new Client({
        uri: ioturl,
        clientId: AppConfig.credentials.cognitoIdentityId,
        storage: AsyncStorage
      });
      this.client = client;
      client.on('messageReceived', (message) => {
        try {
          const jsonResponse = JSON.parse(message.payloadString);
          console.warn(Date.now()," : received : ", jsonResponse);
        } catch (e) {
          console.warn("Failed to recieve: ", e)
        }
        //this.handleIoTMessage(jsonResponse);
      });

      client.on('connectionLost', (responseObject) => {
        console.warn('CLIENT DC');
        if (responseObject.errorCode !== 0) {
          //clearInterval(this.publishInterval);
          console.warn('CONNECTIONLOST TRIGGERED:', responseObject.errorMessage);
        }
      });

      var connectOptions = {
        useSSL: true,
        timeout: 30000, // In milliseconds, it turns out
        keepAliveInterval:30000,
        cleanSession:true,
        mqttVersion: 4,
      };
      AWS.config.update({region: "ap-southeast-1"}); //now try to connect to another region..where there is no cognito available
      const IoT = new AWS.Iot();


      var params = {
        policyName: "Test",
        principal: AppConfig.credentials.cognitoIdentityId // this cognito identity id is in ap-northeast-1 . NOT in ap-southeast-1 where IOT is located
      };

      IoT.attachPrincipalPolicy(params, (err) => {
        if (err) {
          console.error('ERROR attachPrincipalPolicy: ', err);
        }

        client.connect(connectOptions)
          .then((result) => {
            console.warn("connect resutl : ", result, " .. not subs ")
            return client.subscribe('b/2/p/3/r/4/#', {qos: 1, timeout: 15000})

          })
          .then(function (xx, yy) {
            console.warn("Subscribe succss : ", xx, yy)
            const message = new Message(JSON.stringify({"xxx": "yyy"}));
            message.destinationName = 'b/2/p/3/r/4/xx';
            return client.send(message);
          })
          .then(function (xx, yy) {
            return console.warn("Successfully sent : ", xx, yy)
          })

          .catch((responseObject) => {
            console.warn("response object is : ", responseObject);
            if (responseObject.errorCode !== 0) { // fail
              console.warn(`CATCH ONCONNECTIONLOSTTRIGGERED: ${responseObject.errorMessage}`);
            }
          });
      });
    });

  })
  .catch((error) => {
    console.error(error);
  });

它失败于：

 Error: AMQJS0007E Socket error: Unknown socket error.

有人能提出需要做什么吗？在没有cognito的地区认证用户的标准是什么？

Answer 1

也许你已经意识到了这一点，但Cognito最近在新加坡推出