在AWS上测试Lambda函数时遇到问题

问题描述：

I have been trying to get my first lambda function in Go running via the Amazon API Gateway.

I have the following package set up in go. The goal is to send a JSON request and log and return the body of that request:

package main

import (
    "net/http"
    "log"
    "github.com/aws/aws-lambda-go/lambda"
    "github.com/aws/aws-lambda-go/events"
)

func Handler(request events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {

    //These log statements return empty regardless of JSON input.
    log.Print(request.body)

    return events.APIGatewayProxyResponse{
        StatusCode: http.StatusOK,
        Body: request.Body
    }, nil
}

func main() {
    lambda.Start(Handler)
}

I can build and zip this and upload it to the AWS lambda manager. The AWS lambda manager contains an option to use a test event which I can configure with a JSON string

{
  "testint": 1,
  "teststring": "test"
}

However, if I run this test, I get the following result:

{
  "statusCode": 200,
  "headers": null,
  "body": ""
}

I would expect the body to actually contain the json I passed to the function, but clearly something is going wrong.

我一直试图通过Amazon API Gateway运行Go中的第一个lambda函数。 p> \ n

我正在安装以下软件包。目标是发送JSON请求并记录并返回该请求的正文： p>

 包main 
 
import（
“ net / http” 
“ log  “ 
” github.com/aws/aws-lambda-go/lambda"
“ github.com/aws/aws-lambda-go/events"
)

func Handler（request events.APIGatewayProxyRequest）（  events.APIGatewayProxyResponse，error）{
 
 //无论JSON输入如何，这些日志语句都返回空。
 log.Print（request.body）
 
返回事件。APIGatewayProxyResponse{
 StatusCode：http.StatusOK，  
正文：request.Body 
}，nil 
} 
 
func main（）{
 lambda.Start（Handler）
} 
  code>  pre> 
 
 我可以构建并压缩它，然后将其上传到AWS lambda管理器。
AWS lambda管理器包含一个选项，该选项可以使用测试事件，可以使用JSON字符串对其进行配置 p> 
 
 
  {
“ testint”：1，
“ teststring”：“ test” 
} 
  code>  pre> 
 
 但是，如果我运行此测试，则会得到 以下结果： p> 
 
 
  {
“ statusCode”：200，
“ headers”：null，  
“ body”：“” 
} 
  code>  pre> 
 
 我希望正文实际上包含我传递给函数的json，但显然出了点问题  p> 
  div>

答

There's a few minor things I changed and then it works

First, log.Print(request.body) doesn't compile for me, but using request.Body is fine

Second, the type you are using for the request is

// APIGatewayProxyRequest contains data coming from the API Gateway proxy
type APIGatewayProxyRequest struct {
    Resource              string                        `json:"resource"` // The resource path defined in API Gateway
    Path                  string                        `json:"path"`     // The url path for the caller
    HTTPMethod            string                        `json:"httpMethod"`
    Headers               map[string]string             `json:"headers"`
    QueryStringParameters map[string]string             `json:"queryStringParameters"`
    PathParameters        map[string]string             `json:"pathParameters"`
    StageVariables        map[string]string             `json:"stageVariables"`
    RequestContext        APIGatewayProxyRequestContext `json:"requestContext"`
    Body                  string                        `json:"body"`
    IsBase64Encoded       bool                          `json:"isBase64Encoded,omitempty"`
}

and in this Body is a field "body" that's a string. So altering your test data to

{
  "body": "HELLO"

}

will give some data that passes through

Lastly, the parameters for the Handler in all the examples seems to include a context object, so I added that

func Handler(ctx context.Context, request events.APIGatewayProxyRequest)

Here is a complete version of your program that "worked for me"

package main

import (
    "context"
    "github.com/aws/aws-lambda-go/events"
    "github.com/aws/aws-lambda-go/lambda"
    "log"
    "net/http"
)

func Handler(ctx context.Context, request events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {

    //These log statements return empty regardless of JSON input.
    log.Print(request.Body)

    return events.APIGatewayProxyResponse{
        StatusCode: http.StatusOK,
        Body:       request.Body}, nil
}

func main() {
    lambda.Start(Handler)
}

在AWS上测试Lambda函数时遇到问题

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