(C#) Call an AWS Lambda Function

Demonstrates how to call an AWS Lambda function.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

bool success = false;

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

Chilkat.Rest rest = new Chilkat.Rest();

// Connect to the Amazon AWS REST server.
// such as https://email.us-west-2.amazonaws.com/
bool bTls = true;
int port = 443;
bool 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.
Chilkat.AuthAws 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);

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

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

Chilkat.StringBuilder sbRequestBody = new Chilkat.StringBuilder();
json.EmitSb(sbRequestBody);

Chilkat.StringBuilder sbResponseBody = new Chilkat.StringBuilder();
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody);
if (success == false) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

int statusCode = rest.ResponseStatusCode;
if (statusCode >= 400) {
    Debug.WriteLine("Response Status Code: " + Convert.ToString(statusCode));
    Debug.WriteLine("Response Body: " + sbResponseBody.GetAsString());
    Debug.WriteLine("Failed.");
    return;
}

Debug.WriteLine("Response Body:");
Debug.WriteLine(sbResponseBody.GetAsString());

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
        })
    };
};