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
|
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2010-2012 OpenStack, LLC.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Monkey Patch httplib.HTTPResponse to buffer reads of headers. This can improve
performance when making large numbers of small HTTP requests. This module
also provides helper functions to make HTTP connections using
BufferedHTTPResponse.
.. warning::
If you use this, be sure that the libraries you are using do not access
the socket directly (xmlrpclib, I'm looking at you :/), and instead
make all calls through httplib.
"""
import time
from urllib import quote
from eventlet.green.httplib import (CONTINUE, HTTPConnection, HTTPMessage,
HTTPResponse, HTTPSConnection, _UNKNOWN)
from keystone.common import logging
LOG = logging.getLogger(__name__)
class BufferedHTTPResponse(HTTPResponse):
"""HTTPResponse class that buffers reading of headers"""
def __init__(self, sock, debuglevel=0, strict=0,
method=None): # pragma: no cover
self.sock = sock
self.fp = sock.makefile('rb')
self.debuglevel = debuglevel
self.strict = strict
self._method = method
self.msg = None
# from the Status-Line of the response
self.version = _UNKNOWN # HTTP-Version
self.status = _UNKNOWN # Status-Code
self.reason = _UNKNOWN # Reason-Phrase
self.chunked = _UNKNOWN # is "chunked" being used?
self.chunk_left = _UNKNOWN # bytes left to read in current chunk
self.length = _UNKNOWN # number of bytes left in response
self.will_close = _UNKNOWN # conn will close at end of response
def expect_response(self):
self.fp = self.sock.makefile('rb', 0)
version, status, reason = self._read_status()
if status != CONTINUE:
self._read_status = lambda: (version, status, reason)
self.begin()
else:
self.status = status
self.reason = reason.strip()
self.version = 11
self.msg = HTTPMessage(self.fp, 0)
self.msg.fp = None
class BufferedHTTPConnection(HTTPConnection):
"""HTTPConnection class that uses BufferedHTTPResponse"""
response_class = BufferedHTTPResponse
def connect(self):
self._connected_time = time.time()
return HTTPConnection.connect(self)
def putrequest(self, method, url, skip_host=0, skip_accept_encoding=0):
self._method = method
self._path = url
return HTTPConnection.putrequest(self, method, url, skip_host,
skip_accept_encoding)
def getexpect(self):
response = BufferedHTTPResponse(self.sock, strict=self.strict,
method=self._method)
response.expect_response()
return response
def getresponse(self):
response = HTTPConnection.getresponse(self)
LOG.debug(_('HTTP PERF: %(time).5f seconds to %(method)s '
'%(host)s:%(port)s %(path)s)'),
{'time': time.time() - self._connected_time,
'method': self._method,
'host': self.host,
'port': self.port,
'path': self._path})
return response
def http_connect(ipaddr, port, device, partition, method, path,
headers=None, query_string=None, ssl=False, key_file=None,
cert_file=None):
"""
Helper function to create an HTTPConnection object. If ssl is set True,
HTTPSConnection will be used. However, if ssl=False, BufferedHTTPConnection
will be used, which is buffered for backend Swift services.
:param ipaddr: IPv4 address to connect to
:param port: port to connect to
:param device: device of the node to query
:param partition: partition on the device
:param method: HTTP method to request ('GET', 'PUT', 'POST', etc.)
:param path: request path
:param headers: dictionary of headers
:param query_string: request query string
:param ssl: set True if SSL should be used (default: False)
:param key_file Private key file (not needed if cert_file has private key)
:param cert_file Certificate file (Keystore)
:returns: HTTPConnection object
"""
path = quote('/' + device + '/' + str(partition) + path)
return http_connect_raw(ipaddr, port, device, partition, method, path,
headers, query_string, ssl, key_file, cert_file)
def http_connect_raw(ipaddr, port, method, path, headers=None,
query_string=None, ssl=False, key_file=None,
cert_file=None):
"""
Helper function to create an HTTPConnection object. If ssl is set True,
HTTPSConnection will be used. However, if ssl=False, BufferedHTTPConnection
will be used, which is buffered for backend Swift services.
:param ipaddr: IPv4 address to connect to
:param port: port to connect to
:param method: HTTP method to request ('GET', 'PUT', 'POST', etc.)
:param path: request path
:param headers: dictionary of headers
:param query_string: request query string
:param ssl: set True if SSL should be used (default: False)
:param key_file Private key file (not needed if cert_file has private key)
:param cert_file Certificate file (Keystore)
:returns: HTTPConnection object
"""
if ssl:
conn = HTTPSConnection('%s:%s' % (ipaddr, port), key_file=key_file,
cert_file=cert_file)
else:
conn = BufferedHTTPConnection('%s:%s' % (ipaddr, port))
if query_string:
path += '?' + query_string
conn.path = path
conn.putrequest(method, path)
if headers:
for header, value in headers.iteritems():
conn.putheader(header, value)
conn.endheaders()
return conn
|
