handle t.co properly

test.js

@@ -47,11 +47,19 @@ describe('unshrtn', function() {
     })
   );
 
+  it('handles t.co', done => 
+    u('https://t.co/r2mIeyyY7t', function(err, long) {
+      assert.equal(long, 'http://www.newshub.co.nz/home/election/2017/08/patrick-gower-bill-english-in-shutdown-mode-over-todd-barclay-texts.html');
+      return done();
+    })
+  );
+
   return it('handles canonical link', done =>
     u('https://www.nytimes.com/2017/05/23/opinion/mitch-landrieu-new-orleans-mayor-speech.html?smprod=nytcore-iphone&smid=nytcore-iphone-share&_r=0', function(err, long) {
       assert.equal(long, 'https://www.nytimes.com/2017/05/23/opinion/mitch-landrieu-new-orleans-mayor-speech.html');
       return done();
     })
   );
+
 });
 

unshrtn.js

@@ -1,3 +1,4 @@
+let URL = require('url')
 let jsdom = require('jsdom');
 let level = require('level');
 let stream = require('stream');
@@ -117,14 +118,14 @@ var unshorten = (short, next) => {
   }
 };
 
-
 var userAgent = (url) => {
 
-  // most of the time we pretend to be a browser but fw.to doesn't give
+  // most of the time we pretend to be a browser but fw.to & t.co don't give
   // browsers a Location header and instead rely on META refresh and JavaScript
-  // to redirect browsers (sigh)
-
-  if (url.match(/https?:\/\/fw\.to/)) {
+  // to redirect browsers (sigh) when they are told we are not a browser
+  // they give an HTTP redirect, which is nice
+
+  if (['t.co', 'fw.to'].indexOf(URL.parse(url).hostname) != -1) {
     return "ushrtn (https://github.com/edsu/unshrtn)";
   } else {
     return "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36";