(VB.NET) Call an AWS Lambda Function

Demonstrates how to call an AWS Lambda function.

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

Dim success As Boolean = 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 = True
Dim port As Integer = 443
Dim bAutoReconnect As Boolean = 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"

rest.SetAuthAws(authAws)

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

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

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

Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
If (success = False) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


Dim statusCode As Integer = rest.ResponseStatusCode
If (statusCode >= 400) Then
    Debug.WriteLine("Response Status Code: " & statusCode)
    Debug.WriteLine("Response Body: " & sbResponseBody.GetAsString())
    Debug.WriteLine("Failed.")
    Exit Sub
End If


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
        })
    };
};