JavaScript

Call an AWS Lambda Function

See more AWS Misc Examples

Demonstrates how to call an AWS Lambda function. JavaScript

var success = false;

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

var rest = new CkRest();

//  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 CkAuthAws();
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 CkJsonObject();
json.UpdateString("name","Benny");

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

var sbRequestBody = new CkStringBuilder();
json.EmitSb(sbRequestBody);

var sbResponseBody = new CkStringBuilder();
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());

JavaScript

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
        })
    };
};