app.js

var express = require('express');
var http = require('http');
var ejs = require('ejs');
var url = require('url');
var request = require('request');
var fs = require('fs');


var port = process.env.PORT || 3000;


var app = express();
app.set('view engine', 'ejs');
app.engine('html', require('ejs').renderFile);
app.use(express.static(__dirname + '/public'));

app.get('/', function(req, res) {
  res.end("<p>get gif</p>" +
          '<p>example: http://getgif.azurewebsites.net/gif/funny/dog.gif searches giphy for the tags "funny" and "dog" and returns the first gif it finds with those tags.</p>' +
          '<p>The last term must end with ".gif" if you want to use it in hipchat.</p>'
          );
})


app.get('/*', function(req, res) {
  var gif = false;
  var path = url.parse(req.url).pathname;
  path = path.substring(5);
  var terms = path.split("/").join("+");
  terms = terms.split('.');
  if (terms[1] === 'gif') {
    var gif = true;
    terms = terms[0];
  } else {
    var gif = false;
    terms = terms[0];
  }
  var stuff = "http://api.giphy.com/v1/gifs/search?q=" + terms + "&api_key=dc6zaTOxFJmzC&limit=1";
  
  request(stuff, function(error, response, body) {
    try {
      var image = JSON.parse(body).data[0].images.original;
      // http.get(image.url).on('response', function (response) {
      if (gif === true) {
        res.writeHead(301,{'Content-Type':'text/html', 'Location': image.url});
      } else {
        var loc = 'http://getgif.azurewebsites.net/gif/' + path + '.gif';
        console.log('LOC', loc);
        res.writeHead(301,{'Content-Type':'text/html', 'Location': loc});
      }
      res.end();
      //   response.on('data', function(chunk) {
      //     res.write(chunk);
      //   });
      //   response.on('end', function() {
      //     res.end();
      //   });
      // });
    } catch (err) {
      res.writeHead(301,{'Content-Type':'text/html', 'Location': 'http://media4.giphy.com/media/zLCiUWVfex7ji/giphy.gif'});
      res.end();
      // res.writeHead(200,{'Content-Type':'image/GIF'});
      // var img = fs.readFileSync(__dirname + '/public/default.gif');
      // res.sendFile(__dirname + '/public/default.gif')
      // res.end(img, 'binary');
    }
  });
});





var server = app.listen(port, function() {
  console.log("Listening on port %d", port);
});