How to call a POST API from lambda function? - post

Question

I am trying to integrate a POST API call from a lambda function using Node.js 12.x.
I tried like below:
var posturl = "My post api path";
var jsonData = "{'password':'abcdef','domain':'www.mydomain.com','username':'abc.def'}";
var req = require('request');
const params = {
url: posturl,
headers: { 'jsonData': jsonData }
};
req.post(params, function(err, res, body) {
if(err){
console.log('------error------', err);
} else{
console.log('------success--------', body);
}
});
But when I am execute it using state machine, I am getting the below exception:
{
"errorType": "Error",
"errorMessage": "Cannot find module 'request'\nRequire stack:\n- /var/task/index.js\n- /var/runtime/UserFunction.js\n- /var/runtime/index.js",
"trace": [
"Error: Cannot find module 'request'",
"Require stack:",
"- /var/task/index.js",
"- /var/runtime/UserFunction.js",
"- /var/runtime/index.js",
" at Function.Module._resolveFilename (internal/modules/cjs/loader.js:815:15)",
" at Function.Module._load (internal/modules/cjs/loader.js:667:27)",
" at Module.require (internal/modules/cjs/loader.js:887:19)",
" at require (internal/modules/cjs/helpers.js:74:18)",
" at Runtime.exports.handler (/var/task/index.js:8:14)",
" at Runtime.handleOnce (/var/runtime/Runtime.js:66:25)"
]
}
Here the posturl is my api path and jsondata is my key value pair data.
So How can I call a POST API from lambda function? How can I pass the entire jsondata key when call API? How can I parse the response after the service call?
Update: I have tried like below
All my details are passing with a key jsonData, where I can specify that? Without that key, it will not work.
exports.handler = (event, context, callback) => {
const http = require('http');
const data = JSON.stringify({
password: 'mypassword',
domain: 'www.mydomain.com',
username: 'myusername'
});
const options = {
hostname: 'http://abc.mydomain.com',
path: 'remaining path with ticket',
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Content-Length': data.length
}
};
const req = http.request(options, (res) => {
let data = '';
console.log('Status Code:', res.statusCode);
res.on('data', (chunk) => {
data += chunk;
});
res.on('end', () => {
console.log('Body: ', JSON.parse(data));
});
}).on("error", (err) => {
console.log("Error: ", err.message);
});
req.write(data);
req.end();
};

Answer 1

source : How to Make an HTTP Post Request using Node.js
const https = require('https');
const data = JSON.stringify({
name: 'John Doe',
job: 'Content Writer'
});
const options = {
hostname: 'reqres.in',
path: '/api/users',
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Content-Length': data.length
}
};
const req = https.request(options, (res) => {
let data = '';
console.log('Status Code:', res.statusCode);
res.on('data', (chunk) => {
data += chunk;
});
res.on('end', () => {
console.log('Body: ', JSON.parse(data));
});
}).on("error", (err) => {
console.log("Error: ", err.message);
});
req.write(data);
req.end();