Adds twitter as example for OAuth 1

examples/twitter-example.js

@@ -0,0 +1,75 @@
+var http = require('http');
+var OAuth = require('../lib/oauth.js').OAuth;
+var nodeUrl = require('url');
+var clientID = '';
+var clientSecret = '';
+var callbackURL = '';
+
+oa = new OAuth(
+    'https://api.twitter.com/oauth/request_token',
+    'https://api.twitter.com/oauth/access_token',
+    clientID,
+    clientSecret,
+    '1.0',
+    callbackURL,
+    'HMAC-SHA1'
+);
+
+http.createServer(function (request, response) {
+    oa.getOAuthRequestToken(function (error, oAuthToken, oAuthTokenSecret, results) {
+        var urlObj = nodeUrl.parse(request.url, true);
+        var authURL = 'https://twitter.com/' +
+                'oauth/authenticate?oauth_token=' + oAuthToken;
+        var handlers = {
+            '/': function (request, response) {
+                /**
+                 * Creating an anchor with authURL as href and sending as response
+                 */
+                var body = '<a href="' + authURL + '"> Get Code </a>';
+                response.writeHead(200, {
+                    'Content-Length': body.length,
+                    'Content-Type': 'text/html' });
+                response.end(body);
+            },
+            '/callback': function (request, response) {
+                /** Obtaining access_token */
+                var getOAuthRequestTokenCallback = function (error, oAuthAccessToken,
+                                                             oAuthAccessTokenSecret, results) {
+                    if (error) {
+                        console.log(error);
+                        response.end(JSON.stringify({
+                            message: 'Error occured while getting access token',
+                            error: error
+                        }));
+                        return;
+                    }
+
+                    oa.get('https://api.twitter.com/1.1/account/verify_credentials.json',
+                           oAuthAccessToken,
+                           oAuthAccessTokenSecret,
+                           function (error, twitterResponseData, result) {
+                               if (error) {
+                                   console.log(error)
+                                   res.end(JSON.stringify(error));
+                                   return;
+                               }
+                               try {
+                                   console.log(JSON.parse(twitterResponseData));
+                               } catch (parseError) {
+                                   console.log(parseError);
+                               }
+                               console.log(twitterResponseData);
+                               response.end(twitterResponseData);
+                           });
+                };
+
+                oa.getOAuthAccessToken(urlObj.query.oauth_token, oAuthTokenSecret,
+                                       urlObj.query.oauth_verifier,
+                                       getOAuthRequestTokenCallback);
+
+            }
+        };
+        handlers[urlObj.pathname](request, response);
+    })
+
+}).listen(3000);