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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
1 |
__metaclass__ = type |
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6.1.64
by Curtis Hovey
Clean up python-oddities. |
2 |
__all__ = [ |
3 |
'ForkedFakeService', |
|
4 |
'GrackleService', |
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5 |
]
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|
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
6 |
|
7 |
import httplib |
|
8 |
import logging |
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9 |
import os |
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10 |
from signal import SIGKILL |
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11 |
import simplejson |
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12 |
import sys |
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6.1.70
by Curtis Hovey
Use wsgiref.headers. |
13 |
from wsgiref.headers import Headers |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
14 |
from wsgiref.simple_server import make_server |
15 |
from wsgiref.util import shift_path_info |
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6.1.70
by Curtis Hovey
Use wsgiref.headers. |
16 |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
17 |
from grackle.store import ( |
18 |
MemoryStore, |
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19 |
)
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20 |
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21 |
||
22 |
class GrackleService: |
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6.1.64
by Curtis Hovey
Clean up python-oddities. |
23 |
"""A request handler that forwards to an archive store."""
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
24 |
|
25 |
def __init__(self, store): |
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26 |
self.store = store |
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27 |
self.logger = logging.getLogger('http') |
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28 |
||
29 |
def __call__(self, environ, start_response): |
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30 |
self.environ = environ |
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31 |
self.start_response = start_response |
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6.1.70
by Curtis Hovey
Use wsgiref.headers. |
32 |
self.headers = Headers([('content-type', 'application/json')]) |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
33 |
self.method = environ['REQUEST_METHOD'] |
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6.1.68
by Curtis Hovey
Update rules to get the path and application based on PEP333. |
34 |
if '://' in environ['PATH_INFO']: |
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# All the needed information is embedded in PATH_INFO.
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|
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6.1.69
by Curtis Hovey
Only store the unique information needed by grackle. |
36 |
shift_path_info(environ) # shift the host and or port. |
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6.1.68
by Curtis Hovey
Update rules to get the path and application based on PEP333. |
37 |
self.application = shift_path_info(environ) |
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path = environ['PATH_INFO'].split('/') |
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6.1.69
by Curtis Hovey
Only store the unique information needed by grackle. |
39 |
path.pop(0) # Pop the scheme. |
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6.1.68
by Curtis Hovey
Update rules to get the path and application based on PEP333. |
40 |
self.path = path |
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elif environ['SCRIPT_NAME'] == '': |
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# Remove the application to set the path.
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self.application = shift_path_info(environ) |
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44 |
self.path = environ['PATH_INFO'].split('/') |
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else: |
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46 |
self.application = environ['SCRIPT_NAME'] |
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self.path = environ['PATH_INFO'].split('/') |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
48 |
self.query_string = environ['QUERY_STRING'] |
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return self.handle_request() |
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50 |
||
51 |
def handle_request(self): |
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6.1.63
by Curtis Hovey
Handle usupported URLS and methods. |
52 |
"""Select the method to handle the request and return a response."""
|
53 |
if self.application != 'archive': |
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6.1.65
by Curtis Hovey
Use propert reasons. |
54 |
return self.send_response(httplib.NOT_FOUND) |
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6.1.66
by Curtis Hovey
Simplify logic. |
55 |
elif self.method == 'PUT': |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
56 |
return self.do_PUT() |
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6.1.63
by Curtis Hovey
Handle usupported URLS and methods. |
57 |
elif self.method == 'POST': |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
58 |
return self.do_POST() |
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6.1.63
by Curtis Hovey
Handle usupported URLS and methods. |
59 |
elif self.method == 'GET': |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
60 |
return self.do_GET() |
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6.1.65
by Curtis Hovey
Use propert reasons. |
61 |
return self.send_response(httplib.METHOD_NOT_ALLOWED) |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
62 |
|
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6.1.70
by Curtis Hovey
Use wsgiref.headers. |
63 |
def send_response(self, code, response='', reason=None): |
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6.1.63
by Curtis Hovey
Handle usupported URLS and methods. |
64 |
"""Set the status code and reason, then return the response."""
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
65 |
if reason is None: |
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6.1.56
by Curtis Hovey
No need to uppercase the reason. |
66 |
reason = httplib.responses[code] |
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6.1.67
by Curtis Hovey
Use proper terminology. |
67 |
response_status = '%s %s' % (code, reason) |
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6.1.70
by Curtis Hovey
Use wsgiref.headers. |
68 |
self.start_response(response_status, self.headers.items()) |
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6.1.60
by Curtis Hovey
use send response to ensure a list of strings is returned. |
69 |
return [response] |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
70 |
|
71 |
def do_PUT(self): |
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"""Create an archive or message on PUT."""
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if len(self.path) == 1: |
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# This expected path is /archive/archive_id.
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try: |
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self.store.put_archive(self.path[0]) |
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6.1.60
by Curtis Hovey
use send response to ensure a list of strings is returned. |
77 |
return self.send_response(httplib.CREATED) |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
78 |
except Exception, error: |
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6.1.60
by Curtis Hovey
use send response to ensure a list of strings is returned. |
79 |
return self.send_response( |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
80 |
httplib.BAD_REQUEST, reason=error.__doc__) |
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6.1.58
by Curtis Hovey
do_PUT aways returns a empty list. |
81 |
elif len(self.path) == 2: |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
82 |
# This expected path is /archive/archive_id/message_id.
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try: |
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put_input = self.environ['wsgi.input'] |
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message = put_input.read(int(self.environ['CONTENT_LENGTH'])) |
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self.store.put_message(self.path[0], self.path[1], message) |
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6.1.60
by Curtis Hovey
use send response to ensure a list of strings is returned. |
87 |
return self.send_response(httplib.CREATED) |
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6.1.59
by Curtis Hovey
Always return the error reason. |
88 |
except Exception, error: |
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6.1.60
by Curtis Hovey
use send response to ensure a list of strings is returned. |
89 |
return self.send_response( |
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6.1.59
by Curtis Hovey
Always return the error reason. |
90 |
httplib.BAD_REQUEST, reason=error.__doc__) |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
91 |
|
92 |
def do_POST(self): |
|
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"""Change a message on POST."""
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if len(self.path) == 2: |
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# This expected path is /archive/archive_id/message_id.
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try: |
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# This expected path is /archive/archive_id/message_id.
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response = self.store.hide_message( |
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self.path[0], self.path[1], self.query_string) |
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6.1.60
by Curtis Hovey
use send response to ensure a list of strings is returned. |
100 |
response = simplejson.dumps(response) |
101 |
return self.send_response(httplib.OK, response=response) |
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6.1.59
by Curtis Hovey
Always return the error reason. |
102 |
except Exception, error: |
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6.1.60
by Curtis Hovey
use send response to ensure a list of strings is returned. |
103 |
return self.send_response( |
104 |
httplib.BAD_REQUEST, reason=error.__doc__) |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
105 |
|
106 |
def do_GET(self): |
|
107 |
"""Retrieve a list of messages on GET."""
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|
108 |
try: |
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response = self.store.get_messages( |
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110 |
self.path[0], self.query_string) |
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6.1.60
by Curtis Hovey
use send response to ensure a list of strings is returned. |
111 |
response = simplejson.dumps(response) |
112 |
return self.send_response(httplib.OK, response=response) |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
113 |
except Exception, error: |
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6.1.60
by Curtis Hovey
use send response to ensure a list of strings is returned. |
114 |
return self.send_response( |
115 |
httplib.BAD_REQUEST, reason=error.__doc__) |
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6.1.54
by Curtis Hovey
Converted gracle from a request handler to a wsgi app. |
116 |
|
117 |
def log_message(self, format, *args): |
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118 |
"""Override log_message to use standard Python logging."""
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message = "%s - - [%s] %s\n" % ( |
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120 |
self.address_string(), self.log_date_time_string(), format % args) |
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self.logger.info(message) |
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122 |
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class ForkedFakeService: |
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125 |
"""A Grackle service fake, as a ContextManager."""
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126 |
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def __init__(self, port, message_archives=None, write_logs=False): |
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"""Constructor.
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129 |
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130 |
:param port: The tcp port to use.
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:param message_archives: A dict of lists of dicts representing
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archives of messages. The outer dict represents the archive,
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the list represents the list of messages for that archive.
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:param write_logs: If true, log messages will be written to stdout.
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"""
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self.pid = None |
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self.port = port |
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if message_archives is None: |
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self.message_archives = {} |
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else: |
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self.message_archives = message_archives |
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self.read_end, self.write_end = os.pipe() |
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self.write_logs = write_logs |
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||
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@staticmethod
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146 |
def from_client(client, message_archives=None): |
|
147 |
"""Instantiate a ForkedFakeService from the client.
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148 |
||
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:param port: The client to provide service for.
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150 |
:param message_archives: A dict of lists of dicts representing
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|
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archives of messages. The outer dict represents the archive,
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|
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the list represents the list of messages for that archive.
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|
153 |
"""
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return ForkedFakeService(client.port, message_archives) |
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155 |
||
156 |
def is_ready(self): |
|
157 |
"""Tell the parent process that the server is ready for writes."""
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os.write(self.write_end, 'asdf') |
|
159 |
||
160 |
def __enter__(self): |
|
161 |
"""Run the service.
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162 |
||
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Fork and start a server in the child. Return when the server is ready
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for use."""
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pid = os.fork() |
|
166 |
if pid == 0: |
|
167 |
self.start_server() |
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168 |
self.pid = pid |
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os.read(self.read_end, 1) |
|
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return
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171 |
||
172 |
def start_server(self): |
|
173 |
"""Start the HTTP server."""
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|
174 |
app = GrackleService(MemoryStore(self.message_archives)) |
|
175 |
service = make_server('', self.port, app) |
|
176 |
self.is_ready() |
|
177 |
if self.write_logs: |
|
178 |
logging.basicConfig( |
|
179 |
stream=sys.stderr, level=logging.INFO) |
|
180 |
service.serve_forever() |
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181 |
||
182 |
def __exit__(self, exc_type, exc_val, traceback): |
|
183 |
os.kill(self.pid, SIGKILL) |
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184 |
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185 |
||
186 |
if __name__ == '__main__': |
|
187 |
app = GrackleService(MemoryStore({})) |
|
188 |
service = make_server('', 8787, app) |
|
189 |
service.serve_forever() |