6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
1 |
__metaclass__ = type |
2 |
||
3 |
import httplib |
|
4 |
import logging |
|
5 |
import os |
|
6 |
from signal import SIGKILL |
|
7 |
import simplejson |
|
8 |
import sys |
|
9 |
from wsgiref.simple_server import make_server |
|
10 |
from wsgiref.util import shift_path_info |
|
11 |
from grackle.store import ( |
|
12 |
MemoryStore, |
|
13 |
)
|
|
14 |
||
15 |
||
16 |
class GrackleService: |
|
17 |
"""A request handler that forwards to server.store."""
|
|
18 |
||
19 |
def __init__(self, store): |
|
20 |
self.store = store |
|
21 |
self.logger = logging.getLogger('http') |
|
22 |
||
23 |
def __call__(self, environ, start_response): |
|
24 |
self.environ = environ |
|
25 |
self.start_response = start_response |
|
26 |
self.method = environ['REQUEST_METHOD'] |
|
27 |
self.host_port = shift_path_info(environ) |
|
28 |
self.application = shift_path_info(environ) |
|
29 |
self.path = environ['PATH_INFO'].split('/')[1:] |
|
30 |
self.query_string = environ['QUERY_STRING'] |
|
31 |
return self.handle_request() |
|
32 |
||
33 |
def handle_request(self): |
|
34 |
if self.method == 'PUT': |
|
35 |
return self.do_PUT() |
|
36 |
if self.method == 'POST': |
|
37 |
return self.do_POST() |
|
38 |
if self.method == 'GET': |
|
39 |
return self.do_GET() |
|
40 |
||
41 |
def send_response(self, code, headers={}, reason=None): |
|
42 |
if reason is None: |
|
6.1.56
by Curtis Hovey
No need to uppercase the reason. |
43 |
reason = httplib.responses[code] |
6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
44 |
response_code = '%s %s' % (code, reason) |
45 |
response_headers = {'content-type': 'application/json'} |
|
46 |
response_headers.update(headers.items()) |
|
47 |
self.start_response(response_code, response_headers.items()) |
|
48 |
||
49 |
def do_PUT(self): |
|
50 |
"""Create an archive or message on PUT."""
|
|
51 |
if len(self.path) == 1: |
|
52 |
# This expected path is /archive/archive_id.
|
|
53 |
try: |
|
54 |
self.store.put_archive(self.path[0]) |
|
55 |
self.send_response(httplib.CREATED) |
|
56 |
except Exception, error: |
|
57 |
self.send_response( |
|
58 |
httplib.BAD_REQUEST, reason=error.__doc__) |
|
6.1.58
by Curtis Hovey
do_PUT aways returns a empty list. |
59 |
elif len(self.path) == 2: |
6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
60 |
# This expected path is /archive/archive_id/message_id.
|
61 |
try: |
|
62 |
put_input = self.environ['wsgi.input'] |
|
63 |
message = put_input.read(int(self.environ['CONTENT_LENGTH'])) |
|
64 |
self.store.put_message(self.path[0], self.path[1], message) |
|
65 |
self.send_response(httplib.CREATED) |
|
66 |
except: |
|
67 |
self.send_response(httplib.BAD_REQUEST) |
|
6.1.58
by Curtis Hovey
do_PUT aways returns a empty list. |
68 |
return [] |
6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
69 |
|
70 |
def do_POST(self): |
|
71 |
"""Change a message on POST."""
|
|
72 |
if len(self.path) == 2: |
|
73 |
# This expected path is /archive/archive_id/message_id.
|
|
74 |
try: |
|
75 |
# This expected path is /archive/archive_id/message_id.
|
|
76 |
response = self.store.hide_message( |
|
77 |
self.path[0], self.path[1], self.query_string) |
|
78 |
self.send_response(httplib.OK) |
|
79 |
return [simplejson.dumps(response)] |
|
80 |
except: |
|
81 |
self.send_response(httplib.BAD_REQUEST) |
|
6.1.57
by Curtis Hovey
Do not return a needless empty string. |
82 |
return [] |
6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
83 |
|
84 |
def do_GET(self): |
|
85 |
"""Retrieve a list of messages on GET."""
|
|
86 |
try: |
|
87 |
response = self.store.get_messages( |
|
88 |
self.path[0], self.query_string) |
|
89 |
self.send_response(httplib.OK) |
|
90 |
return [simplejson.dumps(response)] |
|
91 |
except Exception, error: |
|
92 |
self.send_response(httplib.BAD_REQUEST, reason=error.__doc__) |
|
6.1.57
by Curtis Hovey
Do not return a needless empty string. |
93 |
return [] |
6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
94 |
|
95 |
def log_message(self, format, *args): |
|
96 |
"""Override log_message to use standard Python logging."""
|
|
97 |
message = "%s - - [%s] %s\n" % ( |
|
98 |
self.address_string(), self.log_date_time_string(), format % args) |
|
99 |
self.logger.info(message) |
|
100 |
||
101 |
||
102 |
class ForkedFakeService: |
|
103 |
"""A Grackle service fake, as a ContextManager."""
|
|
104 |
||
105 |
def __init__(self, port, message_archives=None, write_logs=False): |
|
106 |
"""Constructor.
|
|
107 |
||
108 |
:param port: The tcp port to use.
|
|
109 |
:param message_archives: A dict of lists of dicts representing
|
|
110 |
archives of messages. The outer dict represents the archive,
|
|
111 |
the list represents the list of messages for that archive.
|
|
112 |
:param write_logs: If true, log messages will be written to stdout.
|
|
113 |
"""
|
|
114 |
self.pid = None |
|
115 |
self.port = port |
|
116 |
if message_archives is None: |
|
117 |
self.message_archives = {} |
|
118 |
else: |
|
119 |
self.message_archives = message_archives |
|
120 |
self.read_end, self.write_end = os.pipe() |
|
121 |
self.write_logs = write_logs |
|
122 |
||
123 |
@staticmethod
|
|
124 |
def from_client(client, message_archives=None): |
|
125 |
"""Instantiate a ForkedFakeService from the client.
|
|
126 |
||
127 |
:param port: The client to provide service for.
|
|
128 |
:param message_archives: A dict of lists of dicts representing
|
|
129 |
archives of messages. The outer dict represents the archive,
|
|
130 |
the list represents the list of messages for that archive.
|
|
131 |
"""
|
|
132 |
return ForkedFakeService(client.port, message_archives) |
|
133 |
||
134 |
def is_ready(self): |
|
135 |
"""Tell the parent process that the server is ready for writes."""
|
|
136 |
os.write(self.write_end, 'asdf') |
|
137 |
||
138 |
def __enter__(self): |
|
139 |
"""Run the service.
|
|
140 |
||
141 |
Fork and start a server in the child. Return when the server is ready
|
|
142 |
for use."""
|
|
143 |
pid = os.fork() |
|
144 |
if pid == 0: |
|
145 |
self.start_server() |
|
146 |
self.pid = pid |
|
147 |
os.read(self.read_end, 1) |
|
148 |
return
|
|
149 |
||
150 |
def start_server(self): |
|
151 |
"""Start the HTTP server."""
|
|
152 |
app = GrackleService(MemoryStore(self.message_archives)) |
|
153 |
service = make_server('', self.port, app) |
|
154 |
self.is_ready() |
|
155 |
if self.write_logs: |
|
156 |
logging.basicConfig( |
|
157 |
stream=sys.stderr, level=logging.INFO) |
|
158 |
service.serve_forever() |
|
159 |
||
160 |
def __exit__(self, exc_type, exc_val, traceback): |
|
161 |
os.kill(self.pid, SIGKILL) |
|
162 |
||
163 |
||
164 |
def application(environ, start_response): |
|
165 |
start_response('200 OK', [('Content-Type', 'text/plain')]) |
|
166 |
return "Hello World" |
|
167 |
||
168 |
||
169 |
if __name__ == '__main__': |
|
170 |
app = GrackleService(MemoryStore({})) |
|
171 |
service = make_server('', 8787, app) |
|
172 |
service.serve_forever() |