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Get Source IP in API Gateway

client ip

  • create function nodejs 18x

    export const handler = async (event,context) => {
    console.log('Received event:', JSON.stringify(event, null, 2));
    context.succeed(event);
};

  • create rest api

  • create POST method and integration request to lambda

  • in method execution, add mapping templates, content-type is application/json, content as following:

    {
  "sourceIp" : "$context.identity.sourceIp",
  "input" : "$input.path('$')"
}

  • deploy it and test

  • curl
    curl -X POST -H 'Content-type: application/json' \
-d '{ "key1": "value1", "key2": "value2", "key3": "value3" }' \
https://xxx.execute-api.us-east-2.amazonaws.com/prod/

alb ip

refer