skyriver/lib/request.js

SkyRiver Streaming Cloud server-side library for NodeJS

'use strict';

var http = require('http'),
    https = require('https')
  , queryString = require('querystring')
  , config = require('./config');

function Request() {
  this.host = config.API_HOST;
  this.port = config.API_PORT;
  this.USE_HTTPS = config.USE_HTTPS;
  this.apiVersion = config.const.DEFAULT_API_VERSION;
}

Request.prototype.get = function(credentials, path, data, fn) {
  var reqPath = '/' + this.apiVersion + path;

  if (data && Object.keys(data).length > 0) {
    reqPath += '?' + queryString.stringify(data);
  }

  var headers = {};
  var options = {
    host: this.host,
    port: this.port,
    path: reqPath,
    method: 'GET',
    headers: headers
  };
  options.headers['Authorization'] = credentials.generateAccessToken(options, null);
  var httpGet = this.USE_HTTPS ? https: http;
  var req = httpGet.request(options, function(res) {
    res.setEncoding('utf-8');

    var responseString = '';

    res.on('data', function(data) {
      responseString += data;
    });

    res.on('end', function() {
      var resultObject = JSON.parse(responseString);

      if (res.statusCode >= 400) {
        fn(resultObject, null);
      } else {
        fn(null, resultObject);
      }
    });
  });

  req.on('error', function(e) {
    fn(e, null);
  });

  req.end();
};

Request.prototype.post = function(credentials, path, data, fn) {
  var dataString = JSON.stringify(data);
  var headers = {
    'Content-Type': 'application/json',
    'Content-Length': Buffer.byteLength(dataString, 'utf8')
  };

  var options = {
    host: this.host,
    port: this.port,
    path: '/' + this.apiVersion + path,
    method: 'POST',
    headers: headers
  };
  options.headers['Authorization'] = credentials.generateAccessToken(options, dataString);
  var httpPost = this.USE_HTTPS ? https: http;
  var req = httpPost.request(options, function(res) {
    res.setEncoding('utf-8');

    var responseString = '';

    res.on('data', function(data) {
      responseString += data;
    });

    res.on('end', function() {
      var resultObject = JSON.parse(responseString);

      if (res.statusCode >= 400) {
        fn(resultObject, null);
      } else {
        fn(null, resultObject);
      }
    });
  });

  req.on('error', function(e) {
    fn(e, null);
  });

  req.write(dataString);

  req.end();
};

Request.prototype.delete = function(credentials, path, fn, data) {
  var dataString;
  var headers = {};
  if (data) {
    dataString = JSON.stringify(data);
    headers = {
      'Content-Type': 'application/json',
      'Content-Length': Buffer.byteLength(dataString, 'utf8')
    };
  }
  var options = {
    host: this.host,
    port: this.port,
    path: '/' + this.apiVersion + path,
    method: 'DELETE',
    headers: headers
  };
  options.headers['Authorization'] = credentials.generateAccessToken(options, dataString);
  var httpDelete = this.USE_HTTPS ? https: http;
  var req = httpDelete.request(options, function(res) {
    res.setEncoding('utf-8');

    var responseString = '';

    res.on('data', function(data) {
      responseString += data;
    });

    res.on('end', function() {
      var resultObject = responseString.length > 0 ? JSON.parse(responseString) : null;

      if (res.statusCode >= 400) {
        fn(resultObject, null);
      } else {
        fn(null, resultObject);
      }
    });
  });

  req.on('error', function(e) {
    fn(e, null);
  });

  req.write(dataString);
  req.end();
};

module.exports = Request;