Initial import into SVN

git-svn-id: https://urly.googlecode.com/svn/trunk@3 4bb6f403-2351-0410-a0e4-d75a30d34d26
mak1e · Jul 4, 2008 · 13b4f66 · 13b4f66
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diff --git a/app.yaml b/app.yaml
@@ -0,0 +1,12 @@
+application: urly2
+version: 1
+runtime: python
+api_version: 1
+
+handlers:
+- url: /static
+  static_dir: static
+
+- url: .*
+  script: main.py
+
diff --git a/index.yaml b/index.yaml
@@ -0,0 +1,19 @@
+indexes:
+
+#  
+#- kind: Urly
+#  properties:
+#  - name: href
+# Creating a composite index failed: ascending single-property indexes are not necessary
+#
+
+
+# AUTOGENERATED
+
+# This index.yaml is automatically updated whenever the dev_appserver
+# detects that a new type of query is run.  If you want to manage the
+# index.yaml file manually, remove the above marker line (the line
+# saying "# AUTOGENERATED").  If you want to manage some indexes
+# manually, move them above the marker line.  The index.yaml file is
+# automatically uploaded to the admin console when you next deploy
+# your application using appcfg.py.
diff --git a/main.html b/main.html
@@ -0,0 +1,41 @@
+{% comment %}
+// Variables for this template:
+// urly - this is an urly instance to show (we use code and href properties)
+// error_404 - an error message to show the user
+// default_href - default href to dump into text area. Why do we have this?
+// error_href - set when we have an improperly formatted href
+{% endcomment %}
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html>
+<head><title>ur.ly - dang short urls</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+<script type="text/javascript" src="static/urly.js"></script>
+</head>
+<body style="font-family: verdana, arial; font-size: 80%; text-align: center">
+<div style="margin: 0 auto; width: 600px; border: 1px solid #cccccc; padding: 10px; text-align: left;">
+
+<span style="float: right"><a href="http://code.google.com/appengine/"><img border="0" src="http://code.google.com/appengine/images/appengine-noborder-120x30.gif" /></a></span>
+<a href="/"><img border="0" style="padding-top: 3px;" src="static/urly.gif" alt=" - dang short urls" /></a>
+
+{% if error_404 or urly or error_href %}
+<div style="margin-top: 5px; margin-bottom: 15px; padding: 10px; background-color: #e6e6ff; border: 1px dashed #cccccc;">
+  {% if error_404 %}Oops - we couldn't find that urly.{% endif %}
+  {% if error_href %}Oops - that address doesn't look right... we can't create a dang short url from it.{% endif %}
+  {% if urly %}
+  {{ urly.href }} is now dang short, and <b>its already on your clipboard</b>.<br />
+  <input id="href" name="href" type="text" style="margin-top: 5px; padding: 3px; width: 300px; border: 1px solid #cccccc;" value="http://ur.ly/{{ urly.code }}" />
+  <script type="text/javascript" language="javascript">window.onload = copy("http://ur.ly/{{ urly.code }}");</script>
+  <script type="text/javascript" language="javascript">window.onload = focus("href");</script>
+  &nbsp;&nbsp;<a href="http://ur.ly/{{ urly.code }}">Try It</a>
+  {% endif %}
+</div>
+{% endif %}
+
+<div style="padding-bottom: 3px;">Enter a long URL below and we'll make it dang short:</div>
+<form action="new.html" method="get" accept-charset="utf-8">
+<textarea style="margin-bottom: 5px; width: 100%; border: 1px solid #cccccc;" name="href" id="href" rows="4">{{ default_href }}</textarea>
+<input type="submit" value="Create" />
+</form>
+<div style="margin-top: 10px; padding-top: 5px; border-top: 1px solid #dddddd;"><span style="float: right"><a href="http://code.google.com/p/urly/">Project</a> <a href="http://code.google.com/p/urly/wiki/APIDocumentation">API</a></span>Drag this link to your browser toolbar: <a href="javascript:location.href='http://ur.ly/new.html?href='+encodeURIComponent(location.href)">ur.ly!</a></div>
+</div>
+</div></body></html>
diff --git a/main.py b/main.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python
+#
+# Copyright 2008 Adam Stiles
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy 
+# of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required 
+# by applicable law or agreed to in writing, software distributed under the 
+# License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS 
+# OF ANY KIND, either express or implied. See the License for the specific 
+# language governing permissions and limitations under the License.
+#
+
+"""A url-shortener built on Google App Engine."""
+__author__ = 'Adam Stiles'
+
+""" 
+All Urly records in the database have an id and an href. We base62 that
+integer id to create a short code that represents that Urly.
+
+/{code}                             Redirect user to urly with this code
+/{code}(.json|.xml|.html)           Show user formatted urly with this code
+/new(.json|.xml|.html)?href={href}  Create a new urly with this href or
+                                    return existing one if it already exists
+                                    Note special handling for 'new' code
+                                    when we have a href GET parameter 'cause
+                                    'new' by itself looks like a code
+"""
+import wsgiref.handlers
+import re, os, logging
+from google.appengine.ext import webapp
+from google.appengine.ext import db
+from urly import Urly
+from view import MainView
+
+class MainHandler(webapp.RequestHandler):
+     """All non-static requests go through this handler.
+     The code and format parameters are pre-populated by
+     our routing regex... see main() below.
+     """
+     def get(self, code, format):
+        if (code is None):
+            MainView.render(self, 200, None, format)
+            return
+
+        href = self.request.get('href').strip()
+        if (code == 'new') and (href is not None):
+            try:
+                u = Urly.find_or_create_by_href(href)
+                if u is not None:
+                    MainView.render(self, 200, u, format)
+                else:
+                    logging.error("Error creating urly by href: %s", str(href))
+                    MainView.render(self, 400, None, format, href)
+            except db.BadValueError:
+                # href parameter is bad
+                MainView.render(self, 400, None, format, href)
+        else:
+            u = Urly.find_by_code(str(code))
+            if u is not None:
+                MainView.render(self, 200, u, format)
+            else:
+                MainView.render(self, 404, None, format)
+
+def main():
+    application = webapp.WSGIApplication([
+        ('/([a-zA-Z0-9]{1,6})?(.xml|.json|.html)?', MainHandler)
+    ], debug=True)
+    wsgiref.handlers.CGIHandler().run(application)
+
+if __name__ == '__main__':
+    main()
diff --git a/static/clipboard.swf b/static/clipboard.swf
diff --git a/static/urly.gif b/static/urly.gif
diff --git a/static/urly.js b/static/urly.js
@@ -0,0 +1,29 @@
+//-----------------------------------------------------------------------------
+function copy(text2copy) {
+  if (window.clipboardData) {
+    window.clipboardData.setData("Text",text2copy);
+  } else {
+    var flashcopier = 'flashcopier';
+    if(!document.getElementById(flashcopier)) {
+      var divholder = document.createElement('div');
+      divholder.id = flashcopier;
+      document.body.appendChild(divholder);
+    }
+    document.getElementById(flashcopier).innerHTML = '';
+    var divinfo = '<embed src="static/clipboard.swf" FlashVars="clipboard='+escape(text2copy)+'" width="0" height="0" type="application/x-shockwave-flash"></embed>';
+    document.getElementById(flashcopier).innerHTML = divinfo;
+  }
+}
+
+//-----------------------------------------------------------------------------
+function focus(id)
+{
+  var el = document.getElementById(id);
+  if (el != null) {
+    el.focus();
+    el.select();
+  }
+}
+
+//-----------------------------------------------------------------------------
+
diff --git a/urly.py b/urly.py
@@ -0,0 +1,88 @@
+# Copyright 2008 Adam Stiles
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy 
+# of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required 
+# by applicable law or agreed to in writing, software distributed under the 
+# License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS 
+# OF ANY KIND, either express or implied. See the License for the specific 
+# language governing permissions and limitations under the License.
+
+from google.appengine.ext import db
+from google.appengine.api import memcache
+import logging
+
+class Urly(db.Model):
+    """Our one-and-only model"""  
+    href = db.LinkProperty(required=True)
+    created_at = db.DateTimeProperty(auto_now_add=True)
+
+    KEY_BASE = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    BASE = 62
+
+    def code(self):
+        """Return our code, our base-62 encoded id"""
+        if not self.is_saved():
+            return None
+        nid = self.key().id()
+        s = []
+        while nid:
+            nid, c = divmod(nid, Urly.BASE)
+            s.append(Urly.KEY_BASE[c])
+        s.reverse()
+        return "".join(s)
+
+    def to_json(self):
+        """JSON is so simple that we won't worry about a template at this point"""
+        return "{\"code\":\"%s\",\"href\":%s\"}\n" % (self.code(), self.href);
+
+    def to_xml(self):
+        """Like JSON, XML is simple enough that we won't template now"""
+        msg = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
+        msg += "<urly code=\"%s\" href=\"%s\" />\n" % (self.code(), self.href)
+        return msg
+
+    def save_in_cache(self):
+        """We don't really care if this fails"""
+        memcache.set(self.code(), self)
+
+    @staticmethod
+    def find_or_create_by_href(href):
+        query = db.Query(Urly)
+        query.filter('href =', href)
+        u = query.get()
+        if not u:
+            u = Urly(href=href)
+            u.put()
+            u.save_in_cache()
+        return u
+
+    @staticmethod
+    def code_to_id(code):
+        aid = 0L
+        for c in code:
+            aid *= Urly.BASE 
+            aid += Urly.KEY_BASE.index(c)
+        return aid
+
+    @staticmethod
+    def find_by_code(code):
+        try:
+            u = memcache.get(code)
+        except:
+            # http://code.google.com/p/googleappengine/issues/detail?id=417
+            logging.error("Urly.find_by_code() memcached error")
+            u = None
+
+        if u is not None:
+            logging.info("Urly.find_by_code() cache HIT: %s", str(code))
+            return u        
+
+        logging.info("Urly.find_by_code() cache MISS: %s", str(code))
+        aid = Urly.code_to_id(code)
+        try:
+            u = Urly.get_by_id(int(aid))
+            if u is not None:
+                u.save_in_cache()
+            return u
+        except db.BadValueError:
+            return None
diff --git a/view.py b/view.py
@@ -0,0 +1,47 @@
+# Copyright 2008 Adam Stiles
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy 
+# of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required 
+# by applicable law or agreed to in writing, software distributed under the 
+# License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS 
+# OF ANY KIND, either express or implied. See the License for the specific 
+# language governing permissions and limitations under the License.
+
+import os
+from google.appengine.ext.webapp import template
+
+class MainView():
+    """Helper method for our one-and-only template. All display goes through here"""
+    @staticmethod
+    def render(handler, status, urly, format, href=None):
+        """Lovin my delphi-like inner functions"""
+        def render_raw(handler, content_type, body):
+            handler.response.headers["Content-Type"] = content_type
+            handler.response.out.write(body)
+
+        def render_main(handler, values=None):
+            path = os.path.join(os.path.dirname(__file__), 'main.html')
+            handler.response.out.write(template.render(path, values))
+
+        """ We never have an error if we have an urly to show """
+        if (urly is not None):
+            if (format is None):
+                handler.redirect(urly.href)
+            elif (format == '.json'):
+                render_raw(handler, "application/json", urly.to_json())
+            elif (format == '.xml'):
+                render_raw(handler, "application/xml", urly.to_xml())
+            else:
+                render_main(handler, { 'urly': urly })
+        elif (status == 400):
+            handler.error(status)
+            if (format != '.json') and (format != '.xml'): 
+                vals = { 'error_href': True, 'default_href': href }
+                render_main(handler, vals)
+        elif (status == 404):
+            handler.error(404)
+            if (format != '.json') and (format != '.xml'): 
+                vals = { 'error_404': True }
+                render_main(handler, vals)
+        else:
+            render_main(handler)