AWS Lambda 和 API 網關 NodeJs 的格式錯誤的 Lambda 代理響應

Question

我正在使用 API 網關和 AWS Lambda 與另一個 AWS Lambda function 交換。

我應該在初始請求插入數據后發送響應，無論是成功還是失敗。 我正在使用帶有 API 網關的特定路由。

這是結構：

現在我不斷收到 502 Malformed Lambda 代理響應，這是在我的 API 測試日志中：

Tue Sep 22 06:56:10 UTC 2020 : Endpoint response headers: {Date=Tue, 22 Sep 2020 06:56:10 GMT, Content-Type=application/json, Content-Length=4, Connection=keep-alive, x-amzn-RequestId=xxxxxxxx, x-amzn-Remapped-Content-Length=0, X-Amz-Executed-Version=$LATEST, X-Amzn-Trace-Id=xxxxxxx}
Tue Sep 22 06:56:10 UTC 2020 : Endpoint response body before transformations: null
Tue Sep 22 06:56:10 UTC 2020 : Execution failed due to configuration error: Malformed Lambda proxy response
Tue Sep 22 06:56:10 UTC 2020 : Method completed with status: 502

問題是我正在返回一個真實的響應。 正如我之前所說，我正在使用 API 網關和lambda-api a package 處理 API 網關路由，如 Express，這就是我正在做的：

api.post('/database-manager/create-request', async (lambdaRequest, lambdaResponse, callback) => {
    await provideConnectionInfo()
    let connection = mysql.createConnection({
            host: mySQLHost,
            user: mySQLUser,
            password: mySQLPassword,
            database: mySQLDatabase
        }
    )
    requestNb = lambdaRequest.headers["request-id"]
    pipelineId = lambdaRequest.headers["pipeline-id"]

    connection.connect(function (err) {
            if (err) throw err
            let query = "INSERT INTO ec2_request(request_id, pipeline_id) VALUES (?,?)"
            connection.query(query,[requestNb,pipelineId], function (err, result) {
                    if (err) {
                        connection.end()
                        console.log("insertion did not work : " + err)
                        let response = {
                            "statusCode": 404,
                            "headers": {},
                            "isBase64Encoded": false,
                            "body": JSON.stringify({message: "Record not inserted"})
                        }
                         return response
                        )

                    } else {
                        connection.end()
                        console.log("1 record inserted")
                        let response = {
                            "statusCode": 200,
                            "headers": {},
                            "isBase64Encoded": false,
                            "body": JSON.stringify({message: "tired of this bs"})
                        }
                        return response

                    }
                }
            )
        }
    )

})

最糟糕的是我的日志沒有顯示任何錯誤：

1600758637213   START RequestId: f804577b-c0a2-4d11-8822-52363fa41c7d Version: $LATEST
1600758639189   2020-09-22T07:10:39.188Z    f804577b-c0a2-4d11-8822-52363fa41c7d    INFO    1 record inserted
1600758639348   END RequestId: f804577b-c0a2-4d11-8822-52363fa41c7d
1600758639348   REPORT RequestId: f804577b-c0a2-4d11-8822-52363fa41c7d  Duration: 2134.45 ms    Billed Duration: 2200 ms    Memory Size: 128 MB Max Memory Used: 94 MB  Init Duration: 555.23 ms

如果有人看到我哪里可能犯了錯誤，我會給他們買一個甜甜圈。

想知道這是錯誤的狀態......

非常感謝，

票價

Answer 1

您正在async內部使用回調 function 而無需等待。

這里有幾個選項

1. 從async api.post('/database-manager/create-request', async (lambdaRequest, lambdaResponse, callback) => {刪除異步。

2. 保持異步並將query function包裝為Promise並使用await

    api.post('/database-manager/create-request', async (lambdaRequest, lambdaResponse, callback) => { await provideConnectionInfo() let connection = mysql.createConnection({ host: mySQLHost, user: mySQLUser, password: mySQLPassword, database: mySQLDatabase } ) requestNb = lambdaRequest.headers["request-id"] pipelineId = lambdaRequest.headers["pipeline-id"] const res = await new Promise(function(resolve, reject) { connection.connect(); let query = "INSERT INTO ec2_request(request_id, pipeline_id) VALUES (?,?)" connection.query(query,[requestNb,pipelineId], function (err, result) { if (err) { connection.end() console.log("insertion did not work: " + err) let response = { "statusCode": 404, "headers": {}, "isBase64Encoded": false, "body": JSON.stringify({message: "Record not inserted"}) } reject(response) } else { connection.end() console.log("1 record inserted") let response = { "statusCode": 200, "headers": {}, "isBase64Encoded": false, "body": JSON.stringify({message: "tired of this bs"}) } resolve(response) } }) }); return res; })

注意：代碼尚未經過測試。