1
2
3
4
5
6 import re
7 import urlparse
8
9 try:
10 from cStringIO import StringIO
11 except ImportError:
12 from StringIO import StringIO
13
14 from restkit.http.body import ChunkedReader, LengthReader, EOFReader, Body, \
15 GzipBody
16 from restkit.errors import InvalidHeader, InvalidHeaderName, NoMoreData, \
17 InvalidRequestLine, InvalidRequestMethod, InvalidHTTPVersion, InvalidHTTPStatus
18
33
34 - def get_data(self, unreader, buf, stop=False):
35 data = unreader.read()
36 if not data:
37 if stop:
38 raise StopIteration()
39 raise NoMoreData(buf.getvalue())
40 buf.write(data)
41
42 - def parse(self, unreader):
43 buf = StringIO()
44
45 self.get_data(unreader, buf, stop=True)
46
47
48 idx = buf.getvalue().find("\r\n")
49 while idx < 0:
50 self.get_data(unreader, buf)
51 idx = buf.getvalue().find("\r\n")
52 self.parse_first_line(buf.getvalue()[:idx])
53 rest = buf.getvalue()[idx+2:]
54 buf.truncate(0)
55 buf.write(rest)
56
57
58 idx = buf.getvalue().find("\r\n\r\n")
59 done = buf.getvalue()[:2] == "\r\n"
60 while idx < 0 and not done:
61 self.get_data(unreader, buf)
62 idx = buf.getvalue().find("\r\n\r\n")
63 done = buf.getvalue()[:2] == "\r\n"
64 if done:
65 self.unreader.unread(buf.getvalue()[2:])
66 return ""
67 self.headers = self.parse_headers(buf.getvalue()[:idx])
68
69 ret = buf.getvalue()[idx+4:]
70 buf.truncate(0)
71 return ret
72
74 raise NotImplementedError()
75
77 headers = []
78
79
80 lines = []
81 while len(data):
82 pos = data.find("\r\n")
83 if pos < 0:
84 lines.append(data)
85 data = ""
86 else:
87 lines.append(data[:pos+2])
88 data = data[pos+2:]
89
90
91
92 while len(lines):
93
94 curr = lines.pop(0)
95 if curr.find(":") < 0:
96 raise InvalidHeader(curr.strip())
97 name, value = curr.split(":", 1)
98 name = name.rstrip(" \t")
99 if self.hdrre.search(name.upper()):
100 raise InvalidHeaderName(name)
101 name, value = name.strip(), [value.lstrip()]
102
103
104 while len(lines) and lines[0].startswith((" ", "\t")):
105 value.append(lines.pop(0))
106 value = ''.join(value).rstrip()
107
108 headers.append((name, value))
109 return headers
110
111 - def set_body_reader(self):
112 chunked = False
113 clength = None
114
115 for (name, value) in self.headers:
116 if name.upper() == "CONTENT-LENGTH":
117 try:
118 clength = int(value)
119 except ValueError:
120 clength = None
121 elif name.upper() == "TRANSFER-ENCODING":
122 chunked = value.lower() == "chunked"
123 elif name.upper() == "CONTENT-ENCODING":
124 self.encoding = value.lower()
125
126 if chunked:
127 self.body = Body(ChunkedReader(self, self.unreader))
128 elif clength is not None:
129 self.body = Body(LengthReader(self, self.unreader, clength))
130 else:
131 self.body = Body(EOFReader(self, self.unreader))
132
134 for (h, v) in self.headers:
135 if h.lower() == "connection":
136 if v.lower().strip() == "close":
137 return True
138 elif v.lower().strip() == "keep-alive":
139 return False
140 return self.version <= (1, 0)
141
142
145 self.methre = re.compile("[A-Z0-9$-_.]{3,20}")
146 self.versre = re.compile("HTTP/(\d+).(\d+)")
147
148 self.method = None
149 self.uri = None
150 self.scheme = None
151 self.host = None
152 self.port = 80
153 self.path = None
154 self.query = None
155 self.fragment = None
156
157 super(Request, self).__init__(unreader)
158
160 bits = line.split(None, 2)
161 if len(bits) != 3:
162 raise InvalidRequestLine(line)
163
164
165 if not self.methre.match(bits[0]):
166 raise InvalidRequestMethod(bits[0])
167 self.method = bits[0].upper()
168
169
170 self.uri = bits[1]
171 parts = urlparse.urlparse(bits[1])
172 self.scheme = parts.scheme or None
173 self.host = parts.netloc or None
174 if parts.port is None:
175 self.port = 80
176 else:
177 self.host = self.host.rsplit(":", 1)[0]
178 self.port = parts.port
179 self.path = parts.path or None
180 self.query = parts.query or None
181 self.fragment = parts.fragment or None
182
183
184 match = self.versre.match(bits[2])
185 if match is None:
186 raise InvalidHTTPVersion(bits[2])
187 self.version = (int(match.group(1)), int(match.group(2)))
188
189 - def set_body_reader(self):
190 super(Request, self).set_body_reader()
191 if isinstance(self.body.reader, EOFReader):
192 self.body = Body(LengthReader(self, self.unreader, 0))
193
195
197 self.versre = re.compile("HTTP/(\d+).(\d+)")
198 self.stare = re.compile("(\d{3})\s*(\w*)")
199 self.status = None
200 self.reason = None
201 self.status_int = None
202
203 super(Response, self).__init__(unreader)
204
206 bits = line.split(None, 1)
207 if len(bits) != 2:
208 raise InvalidRequestLine(line)
209
210
211 matchv = self.versre.match(bits[0])
212 if matchv is None:
213 raise InvalidHTTPVersion(bits[0])
214 self.version = (int(matchv.group(1)), int(matchv.group(2)))
215
216
217 matchs = self.stare.match(bits[1])
218 if matchs is None:
219 raise InvalidHTTPStatus(bits[1])
220
221 self.status = bits[1]
222 self.status_int = int(matchs.group(1))
223 self.reason = matchs.group(2)
224
225 - def set_body_reader(self):
226 super(Response, self).set_body_reader()
227 if self.encoding == "gzip":
228 self.body = GzipBody(self.body.reader)
229