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2
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5
6 import urlparse
7 from restkit import ConnectionPool, request
8 from restkit.sock import MAX_BODY
9
10 ALLOWED_METHODS = ['GET', 'HEAD']
11
12 BLOCK_SIZE = 4096 * 16
13
15
19
21 data = self.body.read(BLOCK_SIZE)
22 if not data:
23 raise StopIteration
24 return data
25
28
30 """A proxy wich redirect the request to SERVER_NAME:SERVER_PORT
31 and send HTTP_HOST header"""
32
35 self.pool = pool or ConnectionPool(**kwargs)
36 self.allowed_methods = allowed_methods
37 self.strip_script_name = strip_script_name
38
40 port = None
41 scheme = environ['wsgi.url_scheme']
42 if 'SERVER_NAME' in environ:
43 host = environ['SERVER_NAME']
44 else:
45 host = environ['HTTP_HOST']
46 if ':' in host:
47 host, port = host.split(':')
48
49 if not port:
50 if 'SERVER_PORT' in environ:
51 port = environ['SERVER_PORT']
52 else:
53 port = scheme == 'https' and '443' or '80'
54
55 uri = '%s://%s:%s' % (scheme, host, port)
56 return uri
57
58 - def __call__(self, environ, start_response):
59 method = environ['REQUEST_METHOD']
60 if method not in self.allowed_methods:
61 start_response('403 Forbidden', ())
62 return ['']
63
64 if self.strip_script_name:
65 path_info = ''
66 else:
67 path_info = environ['SCRIPT_NAME']
68 path_info += environ['PATH_INFO']
69
70 query_string = environ['QUERY_STRING']
71 if query_string:
72 path_info += '?' + query_string
73
74 uri = self.extract_uri(environ)+path_info
75
76 new_headers = {}
77 for k, v in environ.items():
78 if k.startswith('HTTP_'):
79 k = k[5:].replace('_', '-').title()
80 new_headers[k] = v
81
82 for k, v in (('CONTENT_TYPE', None), ('CONTENT_LENGTH', '0')):
83 v = environ.get(k, None)
84 if v is not None:
85 new_headers[k.replace('_', '-').title()] = v
86
87 response = request(uri, method,
88 body=environ['wsgi.input'], headers=new_headers,
89 pool_instance=self.pool)
90
91 start_response(response.status, response.headerslist)
92
93 if 'content-length' in response and \
94 int(response['content-length']) <= MAX_BODY:
95 return [response.body]
96
97 return ResponseIter(response)
98
100 """A proxy based on HTTP_HOST environ variable"""
101
103 port = None
104 scheme = environ['wsgi.url_scheme']
105 host = environ['HTTP_HOST']
106 if ':' in host:
107 host, port = host.split(':')
108
109 if not port:
110 port = scheme == 'https' and '443' or '80'
111
112 uri = '%s://%s:%s' % (scheme, host, port)
113 return uri
114
115
117 """A proxy to redirect all request to a specific uri"""
118
120 super(HostProxy, self).__init__(**kwargs)
121 self.uri = uri.rstrip('/')
122 self.scheme, self.net_loc = urlparse.urlparse(self.uri)[0:2]
123
125 environ['HTTP_HOST'] = self.net_loc
126 return self.uri
127
128
130 """A proxy to redirect all request to CouchDB database"""
131 - def __init__(self, db_name='', uri='http://127.0.0.1:5984',
132 allowed_methods=['GET'], **kwargs):
133 uri = uri.rstrip('/')
134 if db_name:
135 uri += '/' + db_name.strip('/')
136 super(CouchdbProxy, self).__init__(uri, allowed_methods=allowed_methods,
137 **kwargs)
138
140 """parse paste config"""
141 config = {}
142 allowed_methods = local_config.get('allowed_methods', None)
143 if allowed_methods:
144 config['allowed_methods'] = [m.upper() for m in allowed_methods.split()]
145 strip_script_name = local_config.get('strip_script_name', 'true')
146 if strip_script_name.lower() in ('false', '0'):
147 config['strip_script_name'] = False
148 config['max_connections'] = int(local_config.get('max_connections', '5'))
149 return config
150
152 """TransparentProxy entry_point"""
153 config = get_config(local_config)
154 print 'Running TransparentProxy with %s' % config
155 return TransparentProxy(**config)
156
158 """HostProxy entry_point"""
159 uri = uri.rstrip('/')
160 config = get_config(local_config)
161 print 'Running HostProxy on %s with %s' % (uri, config)
162 return HostProxy(uri, **config)
163
164 -def make_couchdb_proxy(global_config, db_name='', uri='http://127.0.0.1:5984',
165 **local_config):
166 """CouchdbProxy entry_point"""
167 uri = uri.rstrip('/')
168 config = get_config(local_config)
169 print 'Running CouchdbProxy on %s/%s with %s' % (uri, db_name, config)
170 return CouchdbProxy(db_name=db_name, uri=uri, **config)
171