-
Notifications
You must be signed in to change notification settings - Fork 11
/
server.py
179 lines (148 loc) · 4.98 KB
/
server.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
#!/usr/bin/env python3
#
# Minimalistic webserver using asyncio.
#
# Copyright (c) 2016 Samuel Groß
#
import asyncio
#
# HTTP Server
#
HTTP_PHRASES = {
100: "Continue",
101: "Switching Protocols",
200: "OK",
201: "Created",
202: "Accepted",
203: "Non-Authoritative Information",
204: "No Content",
205: "Reset Content",
206: "Partial Content",
300: "Multiple Choices",
301: "Moved Permanently",
302: "Found",
303: "See Other",
304: "Not Modified",
305: "Use Proxy",
307: "Temporary Redirect",
400: "Bad Request",
401: "Unauthorized",
402: "Payment Required",
403: "Forbidden",
404: "Not Found",
405: "Method Not Allowed",
406: "Not Acceptable",
407: "Proxy Authentication Required",
408: "Request Time-out",
409: "Conflict",
410: "Gone",
411: "Length Required",
412: "Precondition Failed",
413: "Request Entity Too Large",
414: "Request-URI Too Large",
415: "Unsupported Media Type",
416: "Requested range not satisfiable",
417: "Expectation Failed",
500: "Internal Server Error",
501: "Not Implemented",
502: "Bad Gateway",
503: "Service Unavailable",
504: "Gateway Time-out",
505: "HTTP Version not supported",
}
class HTTPServer:
"""Minimalistic, stream-based HTTP server."""
# TODO add some error handling.. :)
class Response:
"""Represents an outgoing HTTP response."""
def __init__(self, writer):
self._writer = writer
def start_header(self, code):
resline = 'HTTP/1.1 {} {}'.format(code, HTTP_PHRASES.get(code, ''))
print(" >", resline)
self.write(resline + '\r\n')
def end_header(self):
self.add_header('Connection', 'close')
self.write('\r\n')
def write(self, data):
if type(data) == str:
data = bytes(data, 'ascii')
self._writer.write(data)
def add_header(self, key, value):
assert('\n' not in key + value)
print(" > {}: {}".format(key, value))
self.write(key + ': ' + value + '\r\n')
def send_header(self, code, headers):
self.start_header(code)
for key, value in headers.items():
self.add_header(key, value)
self.end_header()
async def drain(self):
await self._writer.drain()
class Request:
"""Represents an incoming HTTP request."""
def __init__(self, peer, method, path, version, headers, reader):
self.peer = peer
self.method = method
self.path = path
self.version = version
self.headers = headers
self.reader = reader
def __str__(self):
s = "Request from {}\n".format(self.peer)
s += " < {} {} {}\n".format(self.method, self.path, self.version)
for key, value in self.headers.items():
s += " < {}: {}\n".format(key, value)
return s
def __init__(self, host, port, routes, loop):
self._coro = asyncio.start_server(self.handle_client, host, port, loop=loop)
self._loop = loop
self._routes = routes
async def send_404(self, request, response):
response.send_header(404, {
'Content-Length': '0'
})
async def receive_header(self, reader, writer):
header = await reader.readuntil(b'\r\n\r\n')
headers = header.rstrip().split(b'\r\n')
# Extract request line
# TODO handle GET parameters etc.
reqline = headers[0].decode('ascii').rstrip().split(' ')
method, path, version = reqline
# Extract remaining headers
headers = dict(line.decode('ascii').split(': ') for line in headers[1:])
peer = writer.get_extra_info('peername')
return self.Request(peer, method, path, version, headers, reader)
async def handle_client(self, reader, writer):
response = self.Response(writer)
request = await self.receive_header(reader, writer)
print(request)
handler = self._routes.get(request.path, self.send_404)
await handler(request, response)
await writer.drain()
writer.close()
def run_forever(self):
server = self._loop.run_until_complete(self._coro)
# Serve requests until Ctrl+C is pressed
print("Serving on {}".format(server.sockets[0].getsockname()))
try:
self._loop.run_forever()
except KeyboardInterrupt:
pass
# Close the server
server.close()
self._loop.run_until_complete(server.wait_closed())
self._loop.close()
#
# Request handlers
#
def serve_file(path, ctype):
async def coro(request, response):
with open(path, 'rb') as f:
content = f.read()
response.send_header(200, {
'Content-Length':str(len(content)),
'Content-Type': ctype
})
response.write(content)
return coro