(Node.js) Call an AWS Lambda Function

Demonstrates how to call an AWS Lambda function.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    var success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var rest = new chilkat.Rest();

    // Connect to the Amazon AWS REST server.
    // such as https://email.us-west-2.amazonaws.com/
    var bTls = true;
    var port = 443;
    var bAutoReconnect = true;

    // -------------------------------------------------------------------------------------------
    // Note: The source of the lambda function (hosted on AWS) is shown at the bottom of this page.
    // --------------------------------------------------------------------------------------------

    // If your lambda function URL is: https://itwxyj3vd6gjtaerbfqnfccs2e0fplzh.lambda-url.us-west-2.on.aws/
    // then use just the domain part here:
    success = rest.Connect("itwxyj3vd6gjtaerbfqnfccs2e0fplzh.lambda-url.us-west-2.on.aws",port,bTls,bAutoReconnect);

    // Provide AWS credentials for the REST call.
    var authAws = new chilkat.AuthAws();
    authAws.AccessKey = "AWS_ACCESS_KEY";
    authAws.SecretKey = "AWS_SECRET_KEY";
    // the region should match our domain above..
    authAws.Region = "us-west-2";
    authAws.ServiceName = "lambda";

    rest.SetAuthAws(authAws);

    var json = new chilkat.JsonObject();
    json.UpdateString("name","Benny");

    rest.AddHeader("Content-Type","application/json");

    var sbRequestBody = new chilkat.StringBuilder();
    json.EmitSb(sbRequestBody);

    var sbResponseBody = new chilkat.StringBuilder();
    success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody);
    if (success == false) {
        console.log(rest.LastErrorText);
        return;
    }

    var statusCode = rest.ResponseStatusCode;
    if (statusCode >= 400) {
        console.log("Response Status Code: " + statusCode);
        console.log("Response Body: " + sbResponseBody.GetAsString());
        console.log("Failed.");
        return;
    }

    console.log("Response Body:");
    console.log(sbResponseBody.GetAsString());

}

chilkatExample();

export const handler = async (event) => {

    let body = "Hello World";

    if (event.body) {
        const input = JSON.parse(event.body);
        if (input.name) {
            body = "Hello " + input.name;
        }
    }

    return {
        statusCode: 200,
        headers: {
            "Content-Type": "application/json"
        },
        body: JSON.stringify({
            message: body
        })
    };
};