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index.ts
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index.ts
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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this
* software and associated documentation files (the "Software"), to deal in the Software
* without restriction, including without limitation the rights to use, copy, modify,
* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
import {APIGatewayProxyEvent, APIGatewayProxyResult, Context} from "aws-lambda";
import {DiscoverInstancesCommand, ServiceDiscoveryClient} from "@aws-sdk/client-servicediscovery";
import fetch from "node-fetch";
const namespace=process.env.NAMESPACE
const service=process.env.SERVICE
const name=process.env.NAME
const answer=process.env.ANSWER
export const handler = async (event:APIGatewayProxyEvent,context:Context): Promise<APIGatewayProxyResult> => {
if(event.httpMethod=="GET") {
let msg = `Could not discover ${namespace}:${service} service`
try {
const client = new ServiceDiscoveryClient({})
const response = await client.send(new DiscoverInstancesCommand({
NamespaceName: namespace,
ServiceName: service,
}))
console.debug(response)
if (response.Instances != null && response.Instances.length > 0) {
const attributes = response.Instances[0].Attributes
if (attributes != null && attributes["url"] != null) {
const url = attributes["url"]
console.info(url)
const response = await fetch(url,{method:"POST"})
msg = await response.text()
}
}
} catch (e) {
console.error(e)
msg = e.message
}
return {statusCode: 200, body: `{\"${name}\":\"${msg}\"}`};
}
else{
return {statusCode: 200, body: answer!};
}
};