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
|
# The contents of this file are subject to the BitTorrent Open Source License
# Version 1.1 (the License). You may not copy or use this file, in either
# source code or executable form, except in compliance with the License. You
# may obtain a copy of the License at http://www.bittorrent.com/license/.
#
# Software distributed under the License is distributed on an AS IS basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
# Written by Bram Cohen
from RawServer_magic import Handler
from cStringIO import StringIO
from sys import stdout
import time
from gzip import GzipFile
DEBUG = False
weekdays = [_("Mon"), _("Tue"), _("Wed"), _("Thu"), _("Fri"), _("Sat"), _("Sun")]
months = [None, _("Jan"), _("Feb"), _("Mar"), _("Apr"), _("May"), _("Jun"),
_("Jul"), _("Aug"), _("Sep"), _("Oct"), _("Nov"), _("Dec")]
class HTTPConnection(object):
def __init__(self, handler, connection):
self.handler = handler
self.connection = connection
self.buf = ''
self.closed = False
self.done = False
self.donereading = False
self.next_func = self.read_type
def get_ip(self):
return self.connection.ip
def data_came_in(self, data):
if self.donereading or self.next_func is None:
return True
self.buf += data
while True:
try:
i = self.buf.index('\n')
except ValueError:
return True
val = self.buf[:i]
self.buf = self.buf[i+1:]
self.next_func = self.next_func(val)
if self.donereading:
return True
if self.next_func is None or self.closed:
return False
def read_type(self, data):
self.header = data.strip()
words = data.split()
if len(words) == 3:
self.command, self.path, garbage = words
self.pre1 = False
elif len(words) == 2:
self.command, self.path = words
self.pre1 = True
if self.command != 'GET':
return None
else:
return None
if self.command not in ('HEAD', 'GET'):
return None
self.headers = {}
return self.read_header
def read_header(self, data):
data = data.strip()
if data == '':
self.donereading = True
# check for Accept-Encoding: header, pick a
if self.headers.has_key('accept-encoding'):
ae = self.headers['accept-encoding']
if DEBUG:
print "Got Accept-Encoding: " + ae + "\n"
else:
#identity assumed if no header
ae = 'identity'
# this eventually needs to support multple acceptable types
# q-values and all that fancy HTTP crap
# for now assume we're only communicating with our own client
if ae.find('gzip') != -1:
self.encoding = 'gzip'
else:
#default to identity.
self.encoding = 'identity'
r = self.handler.getfunc(self, self.path, self.headers)
if r is not None:
self.answer(r)
return None
try:
i = data.index(':')
except ValueError:
return None
self.headers[data[:i].strip().lower()] = data[i+1:].strip()
if DEBUG:
print data[:i].strip() + ": " + data[i+1:].strip()
return self.read_header
def answer(self, (responsecode, responsestring, headers, data)):
if self.closed:
return
if self.encoding == 'gzip':
#transform data using gzip compression
#this is nasty but i'm unsure of a better way at the moment
compressed = StringIO()
gz = GzipFile(fileobj = compressed, mode = 'wb', compresslevel = 9)
gz.write(data)
gz.close()
compressed.seek(0,0)
cdata = compressed.read()
compressed.close()
if len(cdata) >= len(data):
self.encoding = 'identity'
else:
if DEBUG:
print _("Compressed: %i Uncompressed: %i\n") % (len(cdata),len(data))
data = cdata
headers['Content-Encoding'] = 'gzip'
# i'm abusing the identd field here, but this should be ok
if self.encoding == 'identity':
ident = '-'
else:
ident = self.encoding
username = '-'
referer = self.headers.get('referer','-')
useragent = self.headers.get('user-agent','-')
year, month, day, hour, minute, second, a, b, c = time.localtime(time.time())
print '%s %s %s [%02d/%3s/%04d:%02d:%02d:%02d] "%s" %i %i "%s" "%s"' % (
self.connection.ip, ident, username, day, months[month], year, hour,
minute, second, self.header, responsecode, len(data), referer, useragent)
t = time.time()
if t - self.handler.lastflush > self.handler.minflush:
self.handler.lastflush = t
stdout.flush()
self.done = True
r = StringIO()
r.write('HTTP/1.0 ' + str(responsecode) + ' ' +
responsestring + '\r\n')
if not self.pre1:
headers['Content-Length'] = len(data)
for key, value in headers.items():
r.write(key + ': ' + str(value) + '\r\n')
r.write('\r\n')
if self.command != 'HEAD':
r.write(data)
self.connection.write(r.getvalue())
if self.connection.is_flushed():
self.connection.shutdown(1)
class HTTPHandler(Handler):
def __init__(self, getfunc, minflush):
self.connections = {}
self.getfunc = getfunc
self.minflush = minflush
self.lastflush = time.time()
def connection_made(self, connection):
self.connections[connection] = HTTPConnection(self, connection)
def connection_flushed(self, connection):
if self.connections[connection].done:
connection.shutdown(1)
def connection_lost(self, connection):
ec = self.connections[connection]
ec.closed = True
del ec.connection
del ec.next_func
del self.connections[connection]
def data_came_in(self, connection, data):
c = self.connections[connection]
if not c.data_came_in(data) and not c.closed:
c.connection.shutdown(1)
|
