add appengine example -- freebase-images.appspot.com

git-svn-id: http://freebase-python.googlecode.com/svn/trunk@104 5914aa95-5b3a-0410-a3b5-7b719e7fe9b2

1 files changed, 153 insertions, 0 deletions

diff --git a/examples/freebase-images-appengine/hello.py b/examples/freebase-images-appengine/hello.py
new file mode 100644
index 0000000..739d36f
--- /dev/null
+++ b/examples/freebase-images-appengine/hello.py
@@ -0,0 +1,153 @@
+import cgi
+import os
+
+from google.appengine.api import users
+from google.appengine.api import urlfetch
+from google.appengine.ext import webapp
+from google.appengine.ext.webapp import template
+from google.appengine.ext.webapp.util import run_wsgi_app
+from google.appengine.ext import db
+
+import freebase
+
+class Search(db.Model):
+  author = db.UserProperty()
+  id = db.StringProperty()
+  url = db.StringProperty()
+  name = db.StringProperty()
+  date = db.DateTimeProperty(auto_now_add=True)
+
+class MainPage(webapp.RequestHandler):
+    def get(self):
+
+        searches = []
+        searches_avail = False
+
+        user = users.get_current_user()
+
+        if user:
+            url = users.create_logout_url(self.request.uri)
+            url_linktext = 'Logout'
+            searches = Search.gql("where author = :author order by date desc limit 5", author=user)
+            try:
+                searches[0]
+                searches_avail = True
+            except:
+                pass
+        else:
+            url = users.create_login_url(self.request.uri)
+            url_linktext = 'Login to Google'
+
+        template_values = {
+            'user' : user,
+            'searches': searches,
+            'searches_avail' : searches_avail,
+            'url': url,
+            'url_linktext': url_linktext,
+        }
+
+        path = os.path.join(os.path.dirname(__file__), 'index.html')
+        self.response.out.write(template.render(path, template_values))
+
+class Name(webapp.RequestHandler):
+  def get(self):
+    
+    query = { "id" : cgi.escape(self.request.get('id')), "name" : None} 
+    r = freebase.mqlread(query)     
+    self.response.out.write(r.name)
+
+
+class Recents(webapp.RequestHandler):
+    def get(self):
+        user = users.get_current_user()
+        final = ""
+
+        if user:
+            final = "<strong>Your Recent Searches:</strong> "
+            searches = Search.gql("where author = :author order by date desc limit 5", author=user)
+            bignum = -1
+            for num, search in enumerate(searches):
+                final += "<a href='?id=" + search.id + "'>" + search.name + "</a>, "
+                bignum = num
+            
+            final = final[:-2]
+            
+            if bignum == -1:
+                final = ""
+        
+    
+        if not user:
+            final = ""
+
+        self.response.out.write(final) 
+    
+class Info(webapp.RequestHandler):
+  def get(self):
+    VIEW = "?id="
+    BASE = "http://www.freebase.com/api/trans/image_thumb"
+    OPTIONS = "?maxheight=300"
+    
+    id = cgi.escape(self.request.get('id'))
+
+    if id != "":
+        info_query = {
+            "id" : id,
+            "name" : None,    
+        }
+    
+        info = freebase.mqlread(info_query)
+        
+        user = users.get_current_user()
+        search = Search()
+        if user:
+            search.author = user
+        search.id = id
+        search.name = info.name
+        search.url = VIEW + id
+        search.put()
+        
+    
+        query = {
+            "id": id,
+            "/type/reflect/any_reverse": [{
+              "id" : None,
+              "/common/topic/image": [{
+                "id":       None,
+                "optional": True,
+                "limit": 5
+              }]
+            }]
+        }
+        results = freebase.mqlread(query)
+        images = dict()
+        for thing in results["/type/reflect/any_reverse"]:
+            imgroup = thing['/common/topic/image']
+            if len(imgroup) > 0:
+                for image in imgroup:
+                    images[VIEW + thing["id"]] = BASE + image['id'] + OPTIONS
+    
+        #template_values = {"images": images}
+        #path = os.path.join(os.path.dirname(__file__), 'images.html')
+        #self.response.out.write(template.render(path, template_values))
+    
+        final = ""
+        for page, image in images.items():
+            final += "<a href='" + page + "'><img src='" + image + "' alt='' /></a>"
+        if len(final) == 0:
+            final = "Sorry, there are no images to show."
+        self.response.out.write(final)
+    
+    
+
+application = webapp.WSGIApplication(
+                                     [('/', MainPage),
+                                      ('/info', Info),
+                                      ('/name', Name),
+                                      ('/recents', Recents)],
+                                     debug=True)
+
+def main():
+  run_wsgi_app(application)
+
+if __name__ == "__main__":
+  main()
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