由於配置錯誤導致執行失敗：Malformed Lambda Node JS 中的代理響應 Lambda

Question

This is Node JS Lambda, I am returning status code 200 as the response, when i call my lambda function through api gateway, i am getting 502 error, i am sending post request to my API Gateway URL. I am using Lambda proxy api integration .

      request( options, function ( error, res, body ) {
            if ( error ) {
                console.log( "this is error", error );
                return callback( error );
            } else {
                // console.dir( body );
                const response = {
                    statusCode: 200,
                    body: JSON.stringify({
                      message: 'Your function executed successfully!',
                    //   input: event,
                    }),
                  };
                return callback( null, {
                    response,
                } );
            }
        } );

我看到這是日志

(543396a4-952b-451e-8e61-6aeedd2463e9) Endpoint response body before transformations: 
{
    "response": {
    "statusCode": 200,
    "body": "{\"message\":\"Your function executed successfully!\"}"
}
}
 (543396a4-952b-451e-8e61-6aeedd2463e9) Execution failed due to configuration error: 
 Malformed Lambda proxy response
 (543396a4-952b-451e-8e61-6aeedd2463e9) Method completed with status: 502

Answer 1

這有點不直觀，但響應需要有幾個額外的屬性，並且 json 有效負載需要格式更正確一些。

最終響應將是：

return {
        statusCode: 200,
        headers: {
            "Access-Control-Allow-Origin": "*", // or add a specific site (can only provide one origin, not multiple)
            "Content-Type": "application/json" // must include the content type
        },
        isBase64Encoded: false, // not necessarily required, but good practice
        body: JSON.stringify({
            "message": "Your function executed successfully!"
        })
    }

注意：

• json 引用物業名稱
• json 不再有逗號
• header中添加了Content-Type

這里的關鍵要點是 json 響應的主體，因為body必須正確形成和字符串化。