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comparison flowerbed/handlers.py @ 0:0613e2bb0ebe

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initial creation of flowerbed
author Jeff Hammel <jhammel@mozilla.com>
date Mon, 20 Dec 2010 09:24:48 -0800
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-1:000000000000 0:0613e2bb0ebe
1 """
2 request handlers:
3 these are instantiated for every request, then called
4 """
5
6 import os
7 from pkg_resources import resource_filename
8 from urlparse import urlparse
9 from webob import Response, exc
10
11 class HandlerMatchException(Exception):
12 """the handler doesn't match the request"""
13
14 class Handler(object):
15
16 methods = set(['GET']) # methods to listen to
17 handler_path = [] # path elements to match
18
19 @classmethod
20 def match(cls, app, request):
21
22 # check the method
23 if request.method not in cls.methods:
24 return None
25
26 # check the path
27 if request.environ['path'][:len(cls.handler_path)] != cls.handler_path:
28 return None
29
30 try:
31 return cls(app, request)
32 except HandlerMatchException:
33 return None
34
35 def __init__(self, app, request):
36 self.app = app
37 self.request = request
38 self.application_path = urlparse(request.application_url)[2]
39
40 def link(self, path=(), permanant=False):
41 if isinstance(path, basestring):
42 path = [ path ]
43 path = [ i.strip('/') for i in path ]
44 if permanant:
45 application_url = [ self.request.application_url ]
46 else:
47 application_url = [ self.application_path ]
48 path = application_url + path
49 return '/'.join(path)
50
51 def redirect(self, location):
52 raise exc.HTTPSeeOther(location=location)
53
54 class GenshiHandler(Handler):
55
56 def __init__(self, app, request):
57 Handler.__init__(self, app, request)
58 self.data = { 'request': request,
59 'link': self.link }
60
61 def __call__(self):
62 return getattr(self, self.request.method.title())()
63
64 def Get(self):
65 # needs to have self.template set
66 template = self.app.loader.load(self.template)
67 return Response(content_type='text/html',
68 body=template.generate(**self.data).render('html'))
69
70 class Index(GenshiHandler):
71 template = 'index.html'
72 methods=set(['GET', 'POST'])
73
74 def __init__(self, app, request):
75 GenshiHandler.__init__(self, app, request)
76
77 def Get(self):
78 self.data['name'] = self.request.remote_user or self.app.name
79 return GenshiHandler.Get(self)
80
81 def Post(self):
82 self.app.name = self.request.POST.get('name', self.app.name)
83 self.redirect(self.link(self.handler_path))