Lua

Call an AWS Lambda Function

See more AWS Misc Examples

Demonstrates how to call an AWS Lambda function. Lua

local chilkat = require("chilkat")

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

local rest = chilkat.Rest.new()

-- Connect to the Amazon AWS REST server.
-- such as https://email.us-west-2.amazonaws.com/
local bTls = true
local port = 443
local 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:
local success = rest:connect("itwxyj3vd6gjtaerbfqnfccs2e0fplzh.lambda-url.us-west-2.on.aws", port, bTls, bAutoReconnect)

-- Provide AWS credentials for the REST call.
local authAws = chilkat.AuthAws.new()
authAws.access_key = "AWS_ACCESS_KEY"
authAws.secret_key = "AWS_SECRET_KEY"
-- the region should match our domain above..
authAws.region = "us-west-2"
authAws.service_name = "lambda"

rest:set_auth_aws(authAws)

local json = chilkat.JsonObject.new()
json:update_string("name", "Benny")

rest:add_header("Content-Type", "application/json")

local sbRequestBody = chilkat.StringBuilder.new()
json:emit_sb(sbRequestBody)

local sbResponseBody = chilkat.StringBuilder.new()
success = rest:full_request_sb("POST", "/", sbRequestBody, sbResponseBody)
if not success then
    print(rest.last_error_text)
    return
end

local statusCode = rest.response_status_code
if statusCode >= 400 then
    print("Response Status Code: " .. statusCode)
    print("Response Body: " .. sbResponseBody:get_as_string())
    print("Failed.")
    return
end

print("Response Body:")
print(sbResponseBody:get_as_string())

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
        })
    };
};