AWS Lambda HTTP POST Request (Node.js)

Question

I'm relatively new to AWS lambda function and nodejs. I'm working on to try and get the list of 5 cities in a country by using HTTP POST request from this website: "http://www.webservicex.net/globalweather.asmx?op=GetCitiesByCountry"

I've been searching about how to do a HTTP POST request in lambda function but I can't seem to find a good explanation for it.

Searches that I found for http post:

https://www.npmjs.com/package/http-post How to make an HTTP POST request in node.js?

Answer 1

I had difficulty implementing the other answers so I'm posting what worked for me.

In this case the function receives url, path and post data

Lambda function

var querystring = require('querystring');
var http = require('http');

exports.handler = function (event, context) {
var post_data = querystring.stringify(
      event.body
  );

  // An object of options to indicate where to post to
  var post_options = {
      host: event.url,
      port: '80',
      path: event.path,
      method: 'POST',
      headers: {
          'Content-Type': 'application/x-www-form-urlencoded',
          'Content-Length': Buffer.byteLength(post_data)
      }
  };

  // Set up the request
  var post_req = http.request(post_options, function(res) {
      res.setEncoding('utf8');
      res.on('data', function (chunk) {
          console.log('Response: ' + chunk);
          context.succeed();
      });
      res.on('error', function (e) {
        console.log("Got error: " + e.message);
        context.done(null, 'FAILURE');
      });

  });

  // post the data
  post_req.write(post_data);
  post_req.end();

}

Example of call parameters

   {
      "url": "example.com",      
       "path": "/apifunction",
       "body": { "data": "your data"}  <-- here your object
    }