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- Committer: Curtis Hovey
- Date: 2012-03-17 23:01:16 UTC
- Revision ID: curtis.hovey@canonical.com-20120317230116-vjf7ztzwg0asr2x0
Use wsgiref.headers.
added
removed
grackle/service.py
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__metaclass__ = type
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__all__ = [
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'ForkedFakeService',
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'GrackleService',
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]
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import httplib
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import logging
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from signal import SIGKILL
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import simplejson
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import sys
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from wsgiref.headers import Headers
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from wsgiref.simple_server import make_server
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from wsgiref.util import shift_path_info
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from grackle.store import (
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MemoryStore,
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)
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class GrackleService:
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"""A request handler that forwards to server.store."""
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"""A request handler that forwards to an archive store."""
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def __init__(self, store):
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self.store = store
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def __call__(self, environ, start_response):
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self.environ = environ
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self.start_response = start_response
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self.headers = Headers([('content-type', 'application/json')])
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self.method = environ['REQUEST_METHOD']
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self.host_port = shift_path_info(environ)
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self.application = shift_path_info(environ)
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self.path = environ['PATH_INFO'].split('/')[1:]
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if '://' in environ['PATH_INFO']:
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# All the needed information is embedded in PATH_INFO.
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shift_path_info(environ) # shift the host and or port.
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self.application = shift_path_info(environ)
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path = environ['PATH_INFO'].split('/')
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path.pop(0) # Pop the scheme.
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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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self.path = environ['PATH_INFO'].split('/')
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else:
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self.application = environ['SCRIPT_NAME']
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self.path = environ['PATH_INFO'].split('/')
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self.query_string = environ['QUERY_STRING']
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return self.handle_request()
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def handle_request(self):
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if self.method == 'PUT':
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"""Select the method to handle the request and return a response."""
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if self.application != 'archive':
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return self.send_response(httplib.NOT_FOUND)
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elif self.method == 'PUT':
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return self.do_PUT()
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if self.method == 'POST':
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elif self.method == 'POST':
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return self.do_POST()
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if self.method == 'GET':
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elif self.method == 'GET':
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return self.do_GET()
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return self.send_response(httplib.METHOD_NOT_ALLOWED)
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def send_response(self, code, headers={}, reason=None):
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def send_response(self, code, response='', reason=None):
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"""Set the status code and reason, then return the response."""
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if reason is None:
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reason = httplib.responses[code].upper()
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response_code = '%s %s' % (code, reason)
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response_headers = {'content-type': 'application/json'}
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response_headers.update(headers.items())
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self.start_response(response_code, response_headers.items())
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reason = httplib.responses[code]
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response_status = '%s %s' % (code, reason)
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self.start_response(response_status, self.headers.items())
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return [response]
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def do_PUT(self):
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"""Create an archive or message on PUT."""
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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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self.send_response(httplib.CREATED)
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return ['']
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return self.send_response(httplib.CREATED)
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except Exception, error:
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self.send_response(
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return self.send_response(
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httplib.BAD_REQUEST, reason=error.__doc__)
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return ['']
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if len(self.path) == 2:
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elif 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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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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self.send_response(httplib.CREATED)
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return ['']
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except:
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self.send_response(httplib.BAD_REQUEST)
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return ['']
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return self.send_response(httplib.CREATED)
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except Exception, error:
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return self.send_response(
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httplib.BAD_REQUEST, reason=error.__doc__)
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def do_POST(self):
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"""Change a message on POST."""
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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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self.send_response(httplib.OK)
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return [simplejson.dumps(response)]
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except:
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self.send_response(httplib.BAD_REQUEST)
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return ['']
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response = simplejson.dumps(response)
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return self.send_response(httplib.OK, response=response)
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except Exception, error:
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return self.send_response(
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httplib.BAD_REQUEST, reason=error.__doc__)
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def do_GET(self):
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"""Retrieve a list of messages on GET."""
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try:
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response = self.store.get_messages(
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self.path[0], self.query_string)
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self.send_response(httplib.OK)
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return [simplejson.dumps(response)]
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response = simplejson.dumps(response)
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return self.send_response(httplib.OK, response=response)
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except Exception, error:
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self.send_response(httplib.BAD_REQUEST, reason=error.__doc__)
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return ['']
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return self.send_response(
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httplib.BAD_REQUEST, reason=error.__doc__)
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def log_message(self, format, *args):
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"""Override log_message to use standard Python logging."""
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os.kill(self.pid, SIGKILL)
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def application(environ, start_response):
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start_response('200 OK', [('Content-Type', 'text/plain')])
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return "Hello World"
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if __name__ == '__main__':
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app = GrackleService(MemoryStore({}))
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service = make_server('', 8787, app)
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