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
|
import time
import traceback
import urllib
import io
from mitmproxy.net import http
from mitmproxy.utils import strutils
class ClientConn:
def __init__(self, address):
self.address = address
class Flow:
def __init__(self, address, request):
self.client_conn = ClientConn(address)
self.request = request
class Request:
def __init__(self, scheme, method, path, http_version, headers, content):
self.scheme, self.method, self.path = scheme, method, path
self.headers, self.content = headers, content
self.http_version = http_version
def date_time_string():
"""Return the current date and time formatted for a message header."""
WEEKS = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
MONTHS = [
None,
'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'
]
now = time.time()
year, month, day, hh, mm, ss, wd, y_, z_ = time.gmtime(now)
s = "%s, %02d %3s %4d %02d:%02d:%02d GMT" % (
WEEKS[wd],
day, MONTHS[month], year,
hh, mm, ss
)
return s
class WSGIAdaptor:
def __init__(self, app, domain, port, sversion):
self.app, self.domain, self.port, self.sversion = app, domain, port, sversion
def make_environ(self, flow, errsoc, **extra):
"""
Raises:
ValueError, if the content-encoding is invalid.
"""
path = strutils.always_str(flow.request.path, "latin-1")
if '?' in path:
path_info, query = strutils.always_str(path, "latin-1").split('?', 1)
else:
path_info = path
query = ''
environ = {
'wsgi.version': (1, 0),
'wsgi.url_scheme': strutils.always_str(flow.request.scheme, "latin-1"),
'wsgi.input': io.BytesIO(flow.request.content or b""),
'wsgi.errors': errsoc,
'wsgi.multithread': True,
'wsgi.multiprocess': False,
'wsgi.run_once': False,
'SERVER_SOFTWARE': self.sversion,
'REQUEST_METHOD': strutils.always_str(flow.request.method, "latin-1"),
'SCRIPT_NAME': '',
'PATH_INFO': urllib.parse.unquote(path_info),
'QUERY_STRING': query,
'CONTENT_TYPE': strutils.always_str(flow.request.headers.get('Content-Type', ''), "latin-1"),
'CONTENT_LENGTH': strutils.always_str(flow.request.headers.get('Content-Length', ''), "latin-1"),
'SERVER_NAME': self.domain,
'SERVER_PORT': str(self.port),
'SERVER_PROTOCOL': strutils.always_str(flow.request.http_version, "latin-1"),
}
environ.update(extra)
if flow.client_conn.address:
environ["REMOTE_ADDR"] = strutils.always_str(flow.client_conn.address[0], "latin-1")
environ["REMOTE_PORT"] = flow.client_conn.address[1]
for key, value in flow.request.headers.items():
key = 'HTTP_' + strutils.always_str(key, "latin-1").upper().replace('-', '_')
if key not in ('HTTP_CONTENT_TYPE', 'HTTP_CONTENT_LENGTH'):
environ[key] = value
return environ
def error_page(self, soc, headers_sent, s):
"""
Make a best-effort attempt to write an error page. If headers are
already sent, we just bung the error into the page.
"""
c = """
<html>
<h1>Internal Server Error</h1>
<pre>{err}"</pre>
</html>
""".format(err=s).strip().encode()
if not headers_sent:
soc.write(b"HTTP/1.1 500 Internal Server Error\r\n")
soc.write(b"Content-Type: text/html\r\n")
soc.write("Content-Length: {length}\r\n".format(length=len(c)).encode())
soc.write(b"\r\n")
soc.write(c)
def serve(self, request, soc, **env):
state = dict(
response_started=False,
headers_sent=False,
status=None,
headers=None
)
def write(data):
if not state["headers_sent"]:
soc.write("HTTP/1.1 {status}\r\n".format(status=state["status"]).encode())
headers = state["headers"]
if 'server' not in headers:
headers["Server"] = self.sversion
if 'date' not in headers:
headers["Date"] = date_time_string()
soc.write(bytes(headers))
soc.write(b"\r\n")
state["headers_sent"] = True
if data:
soc.write(data)
soc.flush()
def start_response(status, headers, exc_info=None):
if exc_info:
if state["headers_sent"]:
raise exc_info[1]
elif state["status"]:
raise AssertionError('Response already started')
state["status"] = status
state["headers"] = http.Headers([[strutils.always_bytes(k), strutils.always_bytes(v)] for k, v in headers])
if exc_info:
self.error_page(soc, state["headers_sent"], traceback.format_tb(exc_info[2]))
state["headers_sent"] = True
errs = io.BytesIO()
try:
dataiter = self.app(
self.make_environ(request, errs, **env), start_response
)
for i in dataiter:
write(i)
if not state["headers_sent"]:
write(b"")
except Exception:
try:
s = traceback.format_exc()
errs.write(s.encode("utf-8", "replace"))
self.error_page(soc, state["headers_sent"], s)
except Exception: # pragma: no cover
pass
return errs.getvalue()
|
