How to post JSON data to another server by lambda script - php

Question

I am trying to send some JSON data(Fetched From DaynamoDB) to another server from AWS lambda function but while giving the URL in the script :
'use strict';
const https = require('https');
exports.handler = (event, context, callback) => {
var options = {
hostname: 'https://www.corecomputersystem.com',
path: '/getSyncData.php',
port : 432,
method: 'POST',
headers: {
'Content-Type': 'application/json',
}
};
event.Records.forEach((record) => {
console.log(record.eventID);
console.log(record.eventName);
console.log('DynamoDB Record: %j', record.dynamodb);
var res = record.dynamodb;
const req = https.request(options, (res) => {
let body = "";
console.log('Status:', res.statusCode);
console.log('Headers:', JSON.stringify(res.headers));
res.setEncoding('utf8');
res.on('data', (chunk) => body += chunk);
res.on('end', () => {
console.log('Successfully processed HTTPS response');
// If we know it's JSON, parse it
if (res.headers['content-type'] === 'application/json') {
body = JSON.parse(body);
}
callback(null, body);
});
});
req.on('error', callback);
req.write(JSON.stringify(event.data) + "");
req.end();
//context.succeed();
});
};
it's throwing following error,
{
"errorMessage": "getaddrinfo ENOTFOUND https://www.corecomputersystem.com https://www.corecomputersystem.com:432",
"errorType": "Error",
"stackTrace": [
"errnoException (dns.js:26:10)",
"GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:77:26)"
]
}
and if I uncomment the context.succeed(), there is no error, I need help for identifying the error.

Answer 1

Just for deeply with #at0mzk says, a hostname never take any port number, so any prefix like [http, https, smb, nfs]:// will throw an error any where a hostname is requested.
(http://localhost === localhost:80)

Answer 2

remove https:// from hostname variable.
var options = {
hostname: 'www.corecomputersystem.com',
path: '/getSyncData.php',
port : 432,
method: 'POST',
headers: {
'Content-Type': 'application/json',
}
see docs.

Answer 3

Before making HTTPS request we can use :
process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
so it will not ask for authorization.

Answer 4

Another way we can add a key in option before requesting HTTP:
rejectUnauthorized: false
It will not ask for self asigned certificate.
This is what I was searching for.

Answer 5

This worked for me.
In lambda use the following node js.
const https = require('https');
var querystring = require("querystring");
const doPostRequest = (event) => {
//parameters to post
const params = {
name: "John",
title: "Developer",
userid: 123
};
var qs = querystring.stringify(params);
var qslength = qs.length;
return new Promise((resolve, reject) => {
const options = {
host: 'example.com',//without https or http
path: '/yourpath/yourfile.php',
method: 'POST',
port: 443, // replace with 80 for HTTP requests
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': qslength
}
};
var buffer = "";
//create the request object with the callback with the result
const req = https.request(options, (res) => {
resolve(JSON.stringify(res.statusCode));
res.on('data', function (chunk) {
buffer+=chunk;
});
res.on('end', function() {
console.log(buffer);
});
});
// handle the possible errors
req.on('error', (e) => {
reject(e.message);
});
//do the request
req.write(qs);
//finish the request
req.end();
});
};
exports.handler = async (event) => {
try {
const result = await doPostRequest(event);
console.log('result is:️ ', result);
//️️ response structure assume you use proxy integration with API gateway
return {
statusCode: 200,
headers: {'Content-Type': 'application/json'},
body: JSON.stringify(result),
};
} catch (error) {
console.log('Error is:️ ', error);
return {
statusCode: 400,
body: error.message,
};
}
};
For some reason lambda didnt show the response for me other than 200. So I had to create a logfile on my server to verify that it was sending the POST values. From there you can use json_encode to show the posted string or just echo the POST values
$inputJSON = json_encode($_POST);
$input = json_decode($inputJSON, TRUE);
$log = "Data: ".$_SERVER['REMOTE_ADDR'].' - '.date("F j, Y, g:i a").PHP_EOL.
"Data: ".$inputJSON.PHP_EOL.
"Data: ".$input.PHP_EOL.
"Data: ".$_POST['name'].PHP_EOL.
"Data: ".$_POST['title'].PHP_EOL.
"Data: ".$_POST['userid'].PHP_EOL.
"-------------------------".PHP_EOL;
//Save string to log, use FILE_APPEND to append.
file_put_contents('./log_'.date("j.n.Y").'.log', $log, FILE_APPEND);