Added rate limiting on api update requests.

static/quiz_item.coffee

@@ -67,7 +67,7 @@ $("#get-help").click (e) ->
 
 $("#api-refresh").click (e) ->
   e.preventDefault();
-  $.post("{{ url_for('refresh_api') }}");
+  $.post("/refresh");
   refreshQuestion()
 
 $ ->

static/quiz_item.js

@@ -90,7 +90,7 @@
 
   $("#api-refresh").click(function(e) {
     e.preventDefault();
-    $.post("{{ url_for('refresh_api') }}");
+    $.post("/refresh");
     return refreshQuestion();
   });
 

wanikaniburned.py

@@ -6,7 +6,7 @@ from flask.ext.wtf import Form
 import requests
 from wtforms import StringField
 from wtforms.validators import DataRequired
-from datetime import datetime
+from datetime import datetime, timedelta
 
 app = Flask(__name__)
 app.config.from_pyfile('config.py')
@@ -93,12 +93,15 @@ class User(db.Model):
             self.vocabulary = json.dumps(items)
 
     def update_all(self):
-        self.parse_radicals_and_userdata()
-        self.parse_kanji()
-        self.parse_vocabulary()
-        self.last_updated = datetime.utcnow()
-        db.session.add(self)
-        db.session.commit()
+        if (datetime.now() - self.last_updated) > timedelta(hours=1):
+            self.parse_radicals_and_userdata()
+            self.parse_kanji()
+            self.parse_vocabulary()
+            self.last_updated = datetime.utcnow()
+            db.session.add(self)
+            db.session.commit()
+        else:
+            raise ValueError('Cannot refresh now, try again later.')
 
 
 @login_manager.user_loader
@@ -173,8 +176,11 @@ def get_items():
 
 @app.route('/refresh', methods=['POST'])
 def refresh_api():
-    current_user.update_all()
-    return "202"
+    try:
+        current_user.update_all()
+        return "Refresh Successful", 202
+    except ValueError as err:
+        return str(err), 500
 
 
 @app.route('/logout')