(Xojo Plugin) Call an AWS Lambda Function

Demonstrates how to call an AWS Lambda function.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

Dim success As Boolean
success = False

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

Dim rest As New Chilkat.Rest

// Connect to the Amazon AWS REST server.
// such as https://email.us-west-2.amazonaws.com/
Dim bTls As Boolean
bTls = True
Dim port As Int32
port = 443
Dim bAutoReconnect As Boolean
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.
Dim authAws As 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"

success = rest.SetAuthAws(authAws)

Dim json As New Chilkat.JsonObject
success = json.UpdateString("name","Benny")

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

Dim sbRequestBody As New Chilkat.StringBuilder
success = json.EmitSb(sbRequestBody)

Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
If (success = False) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

Dim statusCode As Int32
statusCode = rest.ResponseStatusCode
If (statusCode >= 400) Then
    System.DebugLog("Response Status Code: " + Str(statusCode))
    System.DebugLog("Response Body: " + sbResponseBody.GetAsString())
    System.DebugLog("Failed.")
    Return
End If

System.DebugLog("Response Body:")
System.DebugLog(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
        })
    };
};