How to test a GET and POST call from inside of Lambda - amazon-web-services

Question

I am learning Lambda, have created a Cloud Watch Metrics which triggers Lambda every one minute. At present, my Lambda function is executing properly. But I want to make a fake GET and POST call from inside of Lambda. Something like below:
var https = require('https');
exports.handler = (event, context, callback) => {
var params = {
host: "example.com",
path: "/api/v1/yourmethod"
};
var req = https.request(params, function(res) {
let data = '';
console.log('STATUS: ' + res.statusCode);
res.setEncoding('utf8');
res.on('data', function(chunk) {
data += chunk;
});
res.on('end', function() {
console.log("DONE");
console.log(JSON.parse(data));
});
});
req.end();
};
Question - Since I don't have any GET and POST endpoint/Code hosted in AWS is there any way I can test whether my GET call and POST call from inside of Lambda is working fine? Is there any way in AWS to put together a fake endpoint or something in AWS and make REST call to it for testing purposes?

Answer 1

You can use JSONPlaceholder's APIs for testing calls to external APIs,
They have released Fake Online REST APIs for Testing and Prototyping
You can test calling different http method calls like GET, PUT, POST, DELETE
https://jsonplaceholder.typicode.com/

Answer 2

In case you are using Lambda proxy integration Event will contents a lot of additional information about request: https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html
{
"message": "Hello me!",
"input": {
"resource": "/{proxy+}",
"path": "/hello/world",
"httpMethod": "POST",
"headers": {
"Accept": "*/*",
"Accept-Encoding": "gzip, deflate",
"cache-control": "no-cache",
"CloudFront-Forwarded-Proto": "https",
"CloudFront-Is-Desktop-Viewer": "true",
"CloudFront-Is-Mobile-Viewer": "false",
"CloudFront-Is-SmartTV-Viewer": "false",
"CloudFront-Is-Tablet-Viewer": "false",
"CloudFront-Viewer-Country": "US",
"Content-Type": "application/json",
"headerName": "headerValue",
"Host": "gy415nuibc.execute-api.us-east-1.amazonaws.com",
"Postman-Token": "9f583ef0-ed83-4a38-aef3-eb9ce3f7a57f",
"User-Agent": "PostmanRuntime/2.4.5",
"Via": "1.1 d98420743a69852491bbdea73f7680bd.cloudfront.net (CloudFront)",
"X-Amz-Cf-Id": "pn-PWIJc6thYnZm5P0NMgOUglL1DYtl0gdeJky8tqsg8iS_sgsKD1A==",
"X-Forwarded-For": "54.240.196.186, 54.182.214.83",
"X-Forwarded-Port": "443",
"X-Forwarded-Proto": "https"
},
"multiValueHeaders":{
'Accept':[
"*/*"
],
'Accept-Encoding':[
"gzip, deflate"
],
'cache-control':[
"no-cache"
],
'CloudFront-Forwarded-Proto':[
"https"
],
'CloudFront-Is-Desktop-Viewer':[
"true"
],
'CloudFront-Is-Mobile-Viewer':[
"false"
],
'CloudFront-Is-SmartTV-Viewer':[
"false"
],
'CloudFront-Is-Tablet-Viewer':[
"false"
],
'CloudFront-Viewer-Country':[
"US"
],
'':[
""
],
'Content-Type':[
"application/json"
],
'headerName':[
"headerValue"
],
'Host':[
"gy415nuibc.execute-api.us-east-1.amazonaws.com"
],
'Postman-Token':[
"9f583ef0-ed83-4a38-aef3-eb9ce3f7a57f"
],
'User-Agent':[
"PostmanRuntime/2.4.5"
],
'Via':[
"1.1 d98420743a69852491bbdea73f7680bd.cloudfront.net (CloudFront)"
],
'X-Amz-Cf-Id':[
"pn-PWIJc6thYnZm5P0NMgOUglL1DYtl0gdeJky8tqsg8iS_sgsKD1A=="
],
'X-Forwarded-For':[
"54.240.196.186, 54.182.214.83"
],
'X-Forwarded-Port':[
"443"
],
'X-Forwarded-Proto':[
"https"
]
},
"queryStringParameters": {
"name": "me",
"multivalueName": "me"
},
"multiValueQueryStringParameters":{
"name":[
"me"
],
"multivalueName":[
"you",
"me"
]
},
"pathParameters": {
"proxy": "hello/world"
},
"stageVariables": {
"stageVariableName": "stageVariableValue"
},
"requestContext": {
"accountId": "12345678912",
"resourceId": "roq9wj",
"stage": "testStage",
"requestId": "deef4878-7910-11e6-8f14-25afc3e9ae33",
"identity": {
"cognitoIdentityPoolId": null,
"accountId": null,
"cognitoIdentityId": null,
"caller": null,
"apiKey": null,
"sourceIp": "192.168.196.186",
"cognitoAuthenticationType": null,
"cognitoAuthenticationProvider": null,
"userArn": null,
"userAgent": "PostmanRuntime/2.4.5",
"user": null
},
"resourcePath": "/{proxy+}",
"httpMethod": "POST",
"apiId": "gy415nuibc"
},
"body": "{\r\n\t\"a\": 1\r\n}",
"isBase64Encoded": false
}
}