root / kamaki / clients / connection / kamakicon.py @ 1f417830
History | View | Annotate | Download (6.2 kB)
1 | f364f960 | Stavros Sachtouris | # Copyright 2012 GRNET S.A. All rights reserved.
|
---|---|---|---|
2 | f364f960 | Stavros Sachtouris | #
|
3 | f364f960 | Stavros Sachtouris | # Redistribution and use in source and binary forms, with or
|
4 | f364f960 | Stavros Sachtouris | # without modification, are permitted provided that the following
|
5 | f364f960 | Stavros Sachtouris | # conditions are met:
|
6 | f364f960 | Stavros Sachtouris | #
|
7 | f364f960 | Stavros Sachtouris | # 1. Redistributions of source code must retain the above
|
8 | f364f960 | Stavros Sachtouris | # copyright notice, self.list of conditions and the following
|
9 | f364f960 | Stavros Sachtouris | # disclaimer.
|
10 | f364f960 | Stavros Sachtouris | #
|
11 | f364f960 | Stavros Sachtouris | # 2. Redistributions in binary form must reproduce the above
|
12 | f364f960 | Stavros Sachtouris | # copyright notice, self.list of conditions and the following
|
13 | f364f960 | Stavros Sachtouris | # disclaimer in the documentation and/or other materials
|
14 | f364f960 | Stavros Sachtouris | # provided with the distribution.
|
15 | f364f960 | Stavros Sachtouris | #
|
16 | f364f960 | Stavros Sachtouris | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 | f364f960 | Stavros Sachtouris | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 | f364f960 | Stavros Sachtouris | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 | f364f960 | Stavros Sachtouris | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 | f364f960 | Stavros Sachtouris | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 | f364f960 | Stavros Sachtouris | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 | f364f960 | Stavros Sachtouris | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 | f364f960 | Stavros Sachtouris | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 | f364f960 | Stavros Sachtouris | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 | f364f960 | Stavros Sachtouris | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 | f364f960 | Stavros Sachtouris | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 | f364f960 | Stavros Sachtouris | # POSSIBILITY OF SUCH DAMAGE.
|
28 | f364f960 | Stavros Sachtouris | #
|
29 | f364f960 | Stavros Sachtouris | # The views and conclusions contained in the software and
|
30 | f364f960 | Stavros Sachtouris | # documentation are those of the authors and should not be
|
31 | f364f960 | Stavros Sachtouris | # interpreted as representing official policies, either expressed
|
32 | f364f960 | Stavros Sachtouris | # or implied, of GRNET S.A.
|
33 | f364f960 | Stavros Sachtouris | |
34 | f364f960 | Stavros Sachtouris | from urlparse import urlparse |
35 | b98fe305 | Dionysis Zindros | from objpool.http import get_http_connection |
36 | d5eeabc0 | Stavros Sachtouris | from kamaki.clients.connection import HTTPConnection, HTTPResponse |
37 | d5eeabc0 | Stavros Sachtouris | from kamaki.clients.connection.errors import HTTPConnectionError |
38 | 0238c167 | Stavros Sachtouris | from kamaki.clients.connection.errors import HTTPResponseError |
39 | f8b42e99 | Stavros Sachtouris | from socket import gaierror |
40 | f364f960 | Stavros Sachtouris | |
41 | 5b263ba2 | Stavros Sachtouris | from json import loads |
42 | f364f960 | Stavros Sachtouris | |
43 | f364f960 | Stavros Sachtouris | from time import sleep |
44 | f364f960 | Stavros Sachtouris | from httplib import ResponseNotReady |
45 | f364f960 | Stavros Sachtouris | |
46 | 3dabe5d2 | Stavros Sachtouris | |
47 | f364f960 | Stavros Sachtouris | class KamakiHTTPResponse(HTTPResponse): |
48 | f364f960 | Stavros Sachtouris | |
49 | f364f960 | Stavros Sachtouris | def _get_response(self): |
50 | f364f960 | Stavros Sachtouris | if self.prefetched: |
51 | f364f960 | Stavros Sachtouris | return
|
52 | 5b263ba2 | Stavros Sachtouris | |
53 | 5b263ba2 | Stavros Sachtouris | ready = False
|
54 | 5b263ba2 | Stavros Sachtouris | while not ready: |
55 | 5b263ba2 | Stavros Sachtouris | try:
|
56 | 5b263ba2 | Stavros Sachtouris | r = self.request.getresponse()
|
57 | 5b263ba2 | Stavros Sachtouris | except ResponseNotReady:
|
58 | 0004301f | Stavros Sachtouris | sleep(0.001)
|
59 | 5b263ba2 | Stavros Sachtouris | continue
|
60 | 5b263ba2 | Stavros Sachtouris | break
|
61 | f364f960 | Stavros Sachtouris | self.prefetched = True |
62 | f364f960 | Stavros Sachtouris | headers = {} |
63 | 3dabe5d2 | Stavros Sachtouris | for k, v in r.getheaders(): |
64 | 3dabe5d2 | Stavros Sachtouris | headers.update({k: v}) |
65 | f364f960 | Stavros Sachtouris | self.headers = headers
|
66 | 0004301f | Stavros Sachtouris | self.content = r.read()
|
67 | f364f960 | Stavros Sachtouris | self.status_code = r.status
|
68 | f364f960 | Stavros Sachtouris | self.status = r.reason
|
69 | 5b263ba2 | Stavros Sachtouris | self.request.close()
|
70 | f364f960 | Stavros Sachtouris | |
71 | 3dabe5d2 | Stavros Sachtouris | @property
|
72 | f364f960 | Stavros Sachtouris | def text(self): |
73 | b4c8b916 | Stavros Sachtouris | """
|
74 | b4c8b916 | Stavros Sachtouris | :returns: (str) content
|
75 | b4c8b916 | Stavros Sachtouris | """
|
76 | 5b263ba2 | Stavros Sachtouris | self._get_response()
|
77 | 5f7882af | Stavros Sachtouris | return unicode(self._content) |
78 | 3dabe5d2 | Stavros Sachtouris | |
79 | f364f960 | Stavros Sachtouris | @text.setter
|
80 | f364f960 | Stavros Sachtouris | def test(self, v): |
81 | f364f960 | Stavros Sachtouris | pass
|
82 | f364f960 | Stavros Sachtouris | |
83 | 3dabe5d2 | Stavros Sachtouris | @property
|
84 | f364f960 | Stavros Sachtouris | def json(self): |
85 | b4c8b916 | Stavros Sachtouris | """
|
86 | b4c8b916 | Stavros Sachtouris | :returns: (dict) the json-formated content
|
87 | b4c8b916 | Stavros Sachtouris |
|
88 | b4c8b916 | Stavros Sachtouris | :raises HTTPResponseError: if content is not json formated
|
89 | b4c8b916 | Stavros Sachtouris | """
|
90 | 5b263ba2 | Stavros Sachtouris | self._get_response()
|
91 | f364f960 | Stavros Sachtouris | try:
|
92 | f364f960 | Stavros Sachtouris | return loads(self._content) |
93 | f364f960 | Stavros Sachtouris | except ValueError as err: |
94 | 0238c167 | Stavros Sachtouris | HTTPResponseError('Response not formated in JSON - %s' % err)
|
95 | 3dabe5d2 | Stavros Sachtouris | |
96 | f364f960 | Stavros Sachtouris | @json.setter
|
97 | f364f960 | Stavros Sachtouris | def json(self, v): |
98 | f364f960 | Stavros Sachtouris | pass
|
99 | f364f960 | Stavros Sachtouris | |
100 | 5b263ba2 | Stavros Sachtouris | def release(self): |
101 | b4c8b916 | Stavros Sachtouris | """ Release the connection. Should always be called if the response
|
102 | b4c8b916 | Stavros Sachtouris | content hasn't been used.
|
103 | b4c8b916 | Stavros Sachtouris | """
|
104 | 5b263ba2 | Stavros Sachtouris | if not self.prefetched: |
105 | 5b263ba2 | Stavros Sachtouris | self.request.close()
|
106 | f364f960 | Stavros Sachtouris | |
107 | f364f960 | Stavros Sachtouris | |
108 | 5b263ba2 | Stavros Sachtouris | class KamakiHTTPConnection(HTTPConnection): |
109 | f364f960 | Stavros Sachtouris | |
110 | 9a7efb0d | Stavros Sachtouris | def _retrieve_connection_info(self, extra_params={}): |
111 | 05208859 | Stavros Sachtouris | """
|
112 | 05208859 | Stavros Sachtouris | :param extra_params: (dict) key:val for url parameters
|
113 | 05208859 | Stavros Sachtouris |
|
114 | 05208859 | Stavros Sachtouris | :returns: (scheme, netloc, url?with¶ms)
|
115 | 05208859 | Stavros Sachtouris | """
|
116 | 7d91734c | Stavros Sachtouris | if self.url: |
117 | 7d91734c | Stavros Sachtouris | url = self.url if self.url[-1] == '/' else (self.url + '/') |
118 | 7d91734c | Stavros Sachtouris | else:
|
119 | 7e5415a4 | Stavros Sachtouris | url = 'http://127.0.0.1'
|
120 | 7d91734c | Stavros Sachtouris | if self.path: |
121 | 7d91734c | Stavros Sachtouris | url += self.path[1:] if self.path[0] == '/' else self.path |
122 | 0004301f | Stavros Sachtouris | params = dict(self.params) |
123 | 3dabe5d2 | Stavros Sachtouris | for k, v in extra_params.items(): |
124 | 9a7efb0d | Stavros Sachtouris | params[k] = v |
125 | 3dabe5d2 | Stavros Sachtouris | for i, (key, val) in enumerate(params.items()): |
126 | 3dabe5d2 | Stavros Sachtouris | param_str = ('?' if i == 0 else '&') + unicode(key) |
127 | 5b263ba2 | Stavros Sachtouris | if val is not None: |
128 | 3dabe5d2 | Stavros Sachtouris | param_str += '=' + unicode(val) |
129 | 5b263ba2 | Stavros Sachtouris | url += param_str |
130 | f364f960 | Stavros Sachtouris | |
131 | 7d91734c | Stavros Sachtouris | parsed = urlparse(url) |
132 | 5b263ba2 | Stavros Sachtouris | self.url = url
|
133 | 7d91734c | Stavros Sachtouris | self.path = parsed.path if parsed.path else '/' |
134 | 7d91734c | Stavros Sachtouris | self.path += '?%s' % parsed.query if parsed.query else '' |
135 | 5b263ba2 | Stavros Sachtouris | return (parsed.scheme, parsed.netloc)
|
136 | f364f960 | Stavros Sachtouris | |
137 | 3dabe5d2 | Stavros Sachtouris | def perform_request(self, |
138 | 3dabe5d2 | Stavros Sachtouris | method=None,
|
139 | 3dabe5d2 | Stavros Sachtouris | data=None,
|
140 | 3dabe5d2 | Stavros Sachtouris | async_headers={}, |
141 | 3dabe5d2 | Stavros Sachtouris | async_params={}): |
142 | 5f7882af | Stavros Sachtouris | """
|
143 | 5f7882af | Stavros Sachtouris | :param method: (str) http method ('get', 'post', etc.)
|
144 | 5f7882af | Stavros Sachtouris |
|
145 | 5f7882af | Stavros Sachtouris | :param data: (binary object)
|
146 | 5f7882af | Stavros Sachtouris |
|
147 | 5f7882af | Stavros Sachtouris | :param async_headers: (dict) key:val headers that are used only for one
|
148 | 5f7882af | Stavros Sachtouris | request instance as opposed to self.headers, which remain to be
|
149 | 5f7882af | Stavros Sachtouris | used by following or parallel requests
|
150 | 5f7882af | Stavros Sachtouris |
|
151 | 5f7882af | Stavros Sachtouris | :param async_params: (dict) key:val url parameters that are used only
|
152 | 5f7882af | Stavros Sachtouris | for one request instance as opposed to self.params, which remain to
|
153 | 5f7882af | Stavros Sachtouris | be used by following or parallel requests
|
154 | 5f7882af | Stavros Sachtouris |
|
155 | 5f7882af | Stavros Sachtouris | :returns: (KamakiHTTPResponse) a response object
|
156 | 5f7882af | Stavros Sachtouris |
|
157 | 5f7882af | Stavros Sachtouris | :raises HTTPConnectionError: Connection failures
|
158 | 5f7882af | Stavros Sachtouris | """
|
159 | 3dabe5d2 | Stavros Sachtouris | (scheme, netloc) = self._retrieve_connection_info(
|
160 | 3dabe5d2 | Stavros Sachtouris | extra_params=async_params) |
161 | 0004301f | Stavros Sachtouris | headers = dict(self.headers) |
162 | 3dabe5d2 | Stavros Sachtouris | for k, v in async_headers.items(): |
163 | 9a7efb0d | Stavros Sachtouris | headers[k] = v |
164 | 3ad34f11 | Stavros Sachtouris | |
165 | 3ad34f11 | Stavros Sachtouris | #de-unicode headers to prepare them for http
|
166 | 3ad34f11 | Stavros Sachtouris | http_headers = {} |
167 | 3dabe5d2 | Stavros Sachtouris | for k, v in headers.items(): |
168 | 3ad34f11 | Stavros Sachtouris | http_headers[str(k)] = str(v) |
169 | 3ad34f11 | Stavros Sachtouris | |
170 | 1785ad41 | Stavros Sachtouris | #get connection from pool
|
171 | 1785ad41 | Stavros Sachtouris | conn = get_http_connection(netloc=netloc, scheme=scheme) |
172 | f364f960 | Stavros Sachtouris | try:
|
173 | 3ad34f11 | Stavros Sachtouris | #Be carefull, all non-body variables should not be unicode
|
174 | 3dabe5d2 | Stavros Sachtouris | conn.request(method=str(method.upper()),
|
175 | 7d91734c | Stavros Sachtouris | url=str(self.path), |
176 | 3ad34f11 | Stavros Sachtouris | headers=http_headers, |
177 | 3ad34f11 | Stavros Sachtouris | body=data) |
178 | b9d07587 | Stavros Sachtouris | except Exception as err: |
179 | 1f417830 | Stavros Sachtouris | from traceback import format_stack |
180 | 1f417830 | Stavros Sachtouris | from kamaki.clients import recvlog |
181 | 1f417830 | Stavros Sachtouris | recvlog.debug('\n'.join(['%s' % type(err)] + format_stack())) |
182 | f364f960 | Stavros Sachtouris | conn.close() |
183 | e02728f9 | Stavros Sachtouris | if isinstance(err, gaierror): |
184 | 7e5415a4 | Stavros Sachtouris | raise HTTPConnectionError(
|
185 | 0238c167 | Stavros Sachtouris | 'Cannot connect to %s - %s' % (self.url, err)) |
186 | f364f960 | Stavros Sachtouris | raise
|
187 | f364f960 | Stavros Sachtouris | return KamakiHTTPResponse(conn) |