What's My IP for AWS (Golang)

go.mod

module whats-my-ip

go 1.21.0

require github.com/aws/aws-lambda-go v1.41.0

go.sum

github.com/aws/aws-lambda-go v1.41.0 h1:l/5fyVb6Ud9uYd411xdHZzSf2n86TakxzpvIoz7l+3Y=
github.com/aws/aws-lambda-go v1.41.0/go.mod h1:jwFe2KmMsHmffA1X2R09hH6lFzJQxzI8qK17ewzbQMM=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/testify v1.7.2 h1:4jaiDzPyXQvSd7D0EjG45355tLlV3VOECpq10pLC+8s=
github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

package main

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

type response struct {
	Ip string `json:"ip_address"`
}

func handler(req events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {
	requestContext := req.RequestContext
	requestIdentity := requestContext.Identity
	sourceIp := requestIdentity.SourceIP

	response := &response{sourceIp}

	json, err := json.Marshal(response)

	if err != nil {
		return events.APIGatewayProxyResponse{
			StatusCode: http.StatusInternalServerError,
		}, err
	}

	return events.APIGatewayProxyResponse{
		StatusCode: http.StatusOK,
		Body:       string(json),
	}, nil
}

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

What's My IP.md

What's My IP for AWS Lambda

This is a Go script that can be deployed to AWS Lambda and returns the caller's IP address formatted in JSON.