在 AWS 中获取请求者的 IP 地址 lambda function

Question

I understand, from the answer to this question , that I can get the IP address of the caller of a node.js lambda function by doing this:

events['headers']['X-Forwarded-For']

It seems like, for Go, this information should be inside the context.Context for lambda signatures that take it. However, looking at the documentation , I don't see any mention of request headers. Is there a way to get the same information in a Go lambda function?

Answer 1

After doing some research on my own, I figured out that I needed to put my lambda function behind an API Gateway instance to get the information I was interested in. After doing that, I could modify the handler like this:

package main

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

func LambdaHandler(ctx context.Context, request events.APIGatewayV2HTTPRequest) (int, error) {

    // some code

    addr := request.RequestContext.HTTP.SourceIP

    // some other code

    return 0
}

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

By doing this, the API gateway will populate all the request metadata I need and pass that on to my lambda function. The request body is now contained in request.Body so I can extract that data using JSON deserialization or whatever other method my data is encoded as.