/
body.py
262 lines (217 loc) · 7.13 KB
/
body.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
# -*- coding: utf-8 -
#
# This file is part of gunicorn released under the MIT license.
# See the NOTICE for more information.
import io
import sys
from gunicorn.http.errors import (NoMoreData, ChunkMissingTerminator,
InvalidChunkSize)
class ChunkedReader(object):
def __init__(self, req, unreader):
self.req = req
self.parser = self.parse_chunked(unreader)
self.buf = io.BytesIO()
def read(self, size):
if not isinstance(size, int):
raise TypeError("size must be an integer type")
if size < 0:
raise ValueError("Size must be positive.")
if size == 0:
return b""
if self.parser:
while self.buf.tell() < size:
try:
self.buf.write(next(self.parser))
except StopIteration:
self.parser = None
break
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf = io.BytesIO()
self.buf.write(rest)
return ret
def parse_trailers(self, unreader, data):
buf = io.BytesIO()
buf.write(data)
idx = buf.getvalue().find(b"\r\n\r\n")
done = buf.getvalue()[:2] == b"\r\n"
while idx < 0 and not done:
self.get_data(unreader, buf)
idx = buf.getvalue().find(b"\r\n\r\n")
done = buf.getvalue()[:2] == b"\r\n"
if done:
unreader.unread(buf.getvalue()[2:])
return b""
self.req.trailers = self.req.parse_headers(buf.getvalue()[:idx])
unreader.unread(buf.getvalue()[idx + 4:])
def parse_chunked(self, unreader):
(size, rest) = self.parse_chunk_size(unreader)
while size > 0:
while size > len(rest):
size -= len(rest)
yield rest
rest = unreader.read()
if not rest:
raise NoMoreData()
yield rest[:size]
# Remove \r\n after chunk
rest = rest[size:]
while len(rest) < 2:
rest += unreader.read()
if rest[:2] != b'\r\n':
raise ChunkMissingTerminator(rest[:2])
(size, rest) = self.parse_chunk_size(unreader, data=rest[2:])
def parse_chunk_size(self, unreader, data=None):
buf = io.BytesIO()
if data is not None:
buf.write(data)
idx = buf.getvalue().find(b"\r\n")
while idx < 0:
self.get_data(unreader, buf)
idx = buf.getvalue().find(b"\r\n")
data = buf.getvalue()
line, rest_chunk = data[:idx], data[idx + 2:]
chunk_size = line.split(b";", 1)[0].strip()
try:
chunk_size = int(chunk_size, 16)
except ValueError:
raise InvalidChunkSize(chunk_size)
if chunk_size == 0:
try:
self.parse_trailers(unreader, rest_chunk)
except NoMoreData:
pass
return (0, None)
return (chunk_size, rest_chunk)
def get_data(self, unreader, buf):
data = unreader.read()
if not data:
raise NoMoreData()
buf.write(data)
class LengthReader(object):
def __init__(self, unreader, length):
self.unreader = unreader
self.length = length
def read(self, size):
if not isinstance(size, int):
raise TypeError("size must be an integral type")
size = min(self.length, size)
if size < 0:
raise ValueError("Size must be positive.")
if size == 0:
return b""
buf = io.BytesIO()
data = self.unreader.read()
while data:
buf.write(data)
if buf.tell() >= size:
break
data = self.unreader.read()
buf = buf.getvalue()
ret, rest = buf[:size], buf[size:]
self.unreader.unread(rest)
self.length -= size
return ret
class EOFReader(object):
def __init__(self, unreader):
self.unreader = unreader
self.buf = io.BytesIO()
self.finished = False
def read(self, size):
if not isinstance(size, int):
raise TypeError("size must be an integral type")
if size < 0:
raise ValueError("Size must be positive.")
if size == 0:
return b""
if self.finished:
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf = io.BytesIO()
self.buf.write(rest)
return ret
data = self.unreader.read()
while data:
self.buf.write(data)
if self.buf.tell() > size:
break
data = self.unreader.read()
if not data:
self.finished = True
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf = io.BytesIO()
self.buf.write(rest)
return ret
class Body(object):
def __init__(self, reader):
self.reader = reader
self.buf = io.BytesIO()
def __iter__(self):
return self
def __next__(self):
ret = self.readline()
if not ret:
raise StopIteration()
return ret
next = __next__
def getsize(self, size):
if size is None:
return sys.maxsize
elif not isinstance(size, int):
raise TypeError("size must be an integral type")
elif size < 0:
return sys.maxsize
return size
def read(self, size=None):
size = self.getsize(size)
if size == 0:
return b""
if size < self.buf.tell():
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf = io.BytesIO()
self.buf.write(rest)
return ret
while size > self.buf.tell():
data = self.reader.read(1024)
if not data:
break
self.buf.write(data)
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf = io.BytesIO()
self.buf.write(rest)
return ret
def readline(self, size=None):
size = self.getsize(size)
if size == 0:
return b""
data = self.buf.getvalue()
self.buf = io.BytesIO()
ret = []
while 1:
idx = data.find(b"\n", 0, size)
idx = idx + 1 if idx >= 0 else size if len(data) >= size else 0
if idx:
ret.append(data[:idx])
self.buf.write(data[idx:])
break
ret.append(data)
size -= len(data)
data = self.reader.read(min(1024, size))
if not data:
break
return b"".join(ret)
def readlines(self, size=None):
ret = []
data = self.read()
while data:
pos = data.find(b"\n")
if pos < 0:
ret.append(data)
data = b""
else:
line, data = data[:pos + 1], data[pos + 1:]
ret.append(line)
return ret