Add Goodreads API sample.

Author: Eric Koleda

samples/Goodreads.gs

@@ -0,0 +1,82 @@
+/*
+ * This script must be published as a web app (Publish > Deploy as web app) in 
+ * order to function. The web app URL is used instead of the normal callback
+ * URL to work around a bug in the Goodreads API's OAuth implementation
+* (https://goo.gl/cRfdph).
+ */ 
+
+var CONSUMER_KEY = '...';
+var CONSUMER_SECRET = '...';
+
+/**
+ * Authorizes and makes a request to the Twitter API.
+ */
+function run() {
+  var service = getService();
+  if (service.hasAccess()) {
+    var url = 'https://www.goodreads.com/api/auth_user';
+    var response = service.fetch(url);
+    var result = response.getContentText();
+    Logger.log(result);
+  } else {
+    var authorizationUrl = service.authorize();
+    Logger.log('Open the following URL and re-run the script: %s',
+        authorizationUrl);
+  }
+}
+
+/**
+ * Reset the authorization state, so that it can be re-tested.
+ */
+function reset() {
+  var service = getService();
+  service.reset();
+}
+
+/**
+ * Configures the service.
+ */
+function getService() {
+  var service = OAuth1.createService('Goodreads')
+      // Set the endpoint URLs.
+      .setAccessTokenUrl('https://www.goodreads.com/oauth/access_token')
+      .setRequestTokenUrl('https://www.goodreads.com/oauth/request_token')
+      .setAuthorizationUrl('https://www.goodreads.com/oauth/authorize')
+
+      // Set the consumer key and secret.
+      .setConsumerKey(CONSUMER_KEY)
+      .setConsumerSecret(CONSUMER_SECRET)
+
+      // Set the name of the callback function in the script referenced
+      // above that should be invoked to complete the OAuth flow.
+      .setCallbackFunction('authCallback')
+
+      // Set the property store where authorized tokens should be persisted.
+      .setPropertyStore(PropertiesService.getUserProperties())
+  
+      // Set the OAuth version (default: 1.0a)
+      .setOAuthVersion('1.0');
+  
+  // Override the callback URL method to use the web app URL instead.
+  service.getCallbackUrl = function() {
+    return ScriptApp.getService().getUrl();
+  };
+  
+  return service;
+}
+
+/**
+ * Handles GET requests to the web app.
+ */
+function doGet(request) {
+  // Determine if the request is part of an OAuth callback.
+  if (request.parameter.oauth_token) {
+    var service = getService();
+    var authorized = service.handleCallback(request);
+    if (authorized) {
+      return HtmlService.createHtmlOutput('Success!');
+    } else {
+      return HtmlService.createHtmlOutput('Denied');
+    }
+  }
+}