CanvasDataAuth_Tables.cdconfig

//Adding necessary node modules
var querystring = require('querystring');
var https = require('https');
var dateFormat = require('dateformat');
var crypto = require('crypto');  
var url = require('url');  

//Declaring and assembling pieces for HMAC auth
var date = Date();
var timestamp = dateFormat(date, "ddd, d mmm yyyy H:MM:ss Z");

//Insert your CanvasAPI API Secret
var secret = 'IRSECRETREPLACEME';  

//Insert your CanvasAPI API Key 
var key = 'IRKEYREPLACEME';  

var opts = {  
  method: 'GET',  
  host: 'portal.inshosteddata.com',  
  path: 'https://portal.inshosteddata.com/api/account/self/file/latest'  
};  
var HMAC_ALG = 'sha256';  

//Assembling Canvas Data Auth credentials
var apiAuth = module.exports = {  
  buildMessage: function(secret, timestamp, reqOpts) {  
    var urlInfo = url.parse(reqOpts.path, true)  
    var sortedParams = Object.keys(urlInfo.query).sort(function(a, b) {  
      return a.localeCompare(b)  
    })  
    var sortedParts = []  
    for (var i = 0; i < sortedParams.length; i++) {  
      var paramName = sortedParams[i]  
      sortedParts.push(paramName + '=' + urlInfo.query[paramName])  
    }  
    var parts = [  
      reqOpts.method.toUpperCase(),  
      reqOpts.host || '',  
      reqOpts.contentType || '',  
      reqOpts.contentMD5 || '',  
      urlInfo.pathname,  
      sortedParts.join('&') || '',  
      timestamp,  
      secret  
    ]  
    return parts.join('\n')  
  },  
  buildHmacSig: function(secret, timestamp, reqOpts) {  
    var message = apiAuth.buildMessage(secret, timestamp, reqOpts)  
    var hmac = crypto.createHmac(HMAC_ALG, new Buffer(secret))  
    hmac.update(message)  
    return hmac.digest('base64')  
  }  
}  

var HMACSig = apiAuth.buildHmacSig(secret, timestamp, opts);
var Auth = 'HMACAuth ' + key;


//Preparing HTTP headers for Canvas Data get request
var GETheaders = {
    'Authorization' : Auth+':'+HMACSig,
    'Date' : timestamp
}; 

var optionsget = {
    headers: GETheaders,
    host : 'portal.inshosteddata.com', // here only the domain name
    // (no http/https !)
    port : 443,
    // this is the endpoint for the latest data dump
    path : 'https://portal.inshosteddata.com/api/account/self/file/latest',  //the rest of the url with parameters if needed
    method : 'GET' // do GET
};


//This function (with the necessary callback) is where we return the object containing our URL(s) for table(s)
var CanvasDataAPICall = function(input, cb) {

  getCall = function(response) {
    var data = [];
    response.setEncoding('utf8');
    response.on('data', function (chunk) {
        data.push(chunk)
      });
    response.on('end', function () {
        var result = JSON.parse(data.join(''))
        cb(result);
      });
  }
  var req = https.request(optionsget, getCall);
  req.end();

}  

module.exports = CanvasDataAPICall;