root / kamaki / clients / __init__.py @ 4018326d
History | View | Annotate | Download (15.2 kB)
1 |
# Copyright 2011-2012 GRNET S.A. All rights reserved.
|
---|---|
2 |
#
|
3 |
# Redistribution and use in source and binary forms, with or
|
4 |
# without modification, are permitted provided that the following
|
5 |
# conditions are met:
|
6 |
#
|
7 |
# 1. Redistributions of source code must retain the above
|
8 |
# copyright notice, self.list of conditions and the following
|
9 |
# disclaimer.
|
10 |
#
|
11 |
# 2. Redistributions in binary form must reproduce the above
|
12 |
# copyright notice, self.list of conditions and the following
|
13 |
# disclaimer in the documentation and/or other materials
|
14 |
# provided with the distribution.
|
15 |
#
|
16 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 |
# POSSIBILITY OF SUCH DAMAGE.
|
28 |
#
|
29 |
# The views and conclusions contained in the software and
|
30 |
# documentation are those of the authors and should not be
|
31 |
# interpreted as representing official policies, either expressed
|
32 |
# or implied, of GRNET S.A.
|
33 |
|
34 |
from urllib2 import quote |
35 |
from urlparse import urlparse |
36 |
from threading import Thread |
37 |
from json import dumps, loads |
38 |
from time import time |
39 |
from httplib import ResponseNotReady |
40 |
from time import sleep |
41 |
from random import random |
42 |
|
43 |
from objpool.http import PooledHTTPConnection |
44 |
|
45 |
from kamaki import logger |
46 |
|
47 |
LOG_FILE = logger.get_log_filename() |
48 |
TIMEOUT = 60.0 # seconds |
49 |
HTTP_METHODS = ['GET', 'POST', 'PUT', 'HEAD', 'DELETE', 'COPY', 'MOVE'] |
50 |
|
51 |
logger.add_file_logger('clients.send', __name__, filename=LOG_FILE)
|
52 |
sendlog = logger.get_logger('clients.send')
|
53 |
sendlog.debug('Logging location: %s' % LOG_FILE)
|
54 |
|
55 |
logger.add_file_logger('data.send', __name__, filename=LOG_FILE)
|
56 |
datasendlog = logger.get_logger('data.send')
|
57 |
|
58 |
logger.add_file_logger('clients.recv', __name__, filename=LOG_FILE)
|
59 |
recvlog = logger.get_logger('clients.recv')
|
60 |
|
61 |
logger.add_file_logger('data.recv', __name__, filename=LOG_FILE)
|
62 |
datarecvlog = logger.get_logger('data.recv')
|
63 |
|
64 |
logger.add_file_logger('ClientError', __name__, filename=LOG_FILE)
|
65 |
clienterrorlog = logger.get_logger('ClientError')
|
66 |
|
67 |
|
68 |
def _encode(v): |
69 |
if v and isinstance(v, unicode): |
70 |
return quote(v.encode('utf-8')) |
71 |
return v
|
72 |
|
73 |
|
74 |
class ClientError(Exception): |
75 |
def __init__(self, message, status=0, details=None): |
76 |
clienterrorlog.debug('ClientError: msg[%s], sts[%s], dtl[%s]' % (
|
77 |
message, |
78 |
status, |
79 |
details)) |
80 |
try:
|
81 |
message += '' if message and message[-1] == '\n' else '\n' |
82 |
serv_stat, sep, new_msg = message.partition('{')
|
83 |
new_msg = sep + new_msg[:-1 if new_msg.endswith('\n') else 0] |
84 |
json_msg = loads(new_msg) |
85 |
key = json_msg.keys()[0]
|
86 |
serv_stat = serv_stat.strip() |
87 |
|
88 |
json_msg = json_msg[key] |
89 |
message = '%s %s (%s)\n' % (
|
90 |
serv_stat, |
91 |
key, |
92 |
json_msg['message']) if ( |
93 |
'message' in json_msg) else '%s %s' % (serv_stat, key) |
94 |
status = json_msg.get('code', status)
|
95 |
if 'details' in json_msg: |
96 |
if not details: |
97 |
details = [] |
98 |
if not isinstance(details, list): |
99 |
details = [details] |
100 |
if json_msg['details']: |
101 |
details.append(json_msg['details'])
|
102 |
except Exception: |
103 |
pass
|
104 |
finally:
|
105 |
while message.endswith('\n\n'): |
106 |
message = message[:-1]
|
107 |
super(ClientError, self).__init__(message) |
108 |
self.status = status if isinstance(status, int) else 0 |
109 |
self.details = details if details else [] |
110 |
|
111 |
|
112 |
class Logged(object): |
113 |
|
114 |
LOG_TOKEN = False
|
115 |
LOG_DATA = False
|
116 |
|
117 |
|
118 |
class RequestManager(Logged): |
119 |
"""Handle http request information"""
|
120 |
|
121 |
def _connection_info(self, url, path, params={}): |
122 |
""" Set self.url to scheme://netloc/?params
|
123 |
:param url: (str or unicode) The service url
|
124 |
|
125 |
:param path: (str or unicode) The service path (url/path)
|
126 |
|
127 |
:param params: (dict) Parameters to add to final url
|
128 |
|
129 |
:returns: (scheme, netloc)
|
130 |
"""
|
131 |
url = _encode(url) if url else 'http://127.0.0.1/' |
132 |
url += '' if url.endswith('/') else '/' |
133 |
if path:
|
134 |
url += _encode(path[1:] if path.startswith('/') else path) |
135 |
delim = '?'
|
136 |
for key, val in params.items(): |
137 |
val = _encode(val) |
138 |
url += '%s%s%s' % (delim, key, ('=%s' % val) if val else '') |
139 |
delim = '&'
|
140 |
parsed = urlparse(url) |
141 |
self.url = url
|
142 |
self.path = parsed.path or '/' |
143 |
if parsed.query:
|
144 |
self.path += '?%s' % parsed.query |
145 |
return (parsed.scheme, parsed.netloc)
|
146 |
|
147 |
def __init__( |
148 |
self, method, url, path,
|
149 |
data=None, headers={}, params={}):
|
150 |
method = method.upper() |
151 |
assert method in HTTP_METHODS, 'Invalid http method %s' % method |
152 |
if headers:
|
153 |
assert isinstance(headers, dict) |
154 |
self.headers = dict(headers) |
155 |
self.method, self.data = method, data |
156 |
self.scheme, self.netloc = self._connection_info(url, path, params) |
157 |
|
158 |
def log(self): |
159 |
sendlog.info('%s %s://%s%s\t[%s]' % (
|
160 |
self.method,
|
161 |
self.scheme,
|
162 |
self.netloc,
|
163 |
self.path,
|
164 |
self))
|
165 |
for key, val in self.headers.items(): |
166 |
if (not self.LOG_TOKEN) and key.lower() == 'x-auth-token': |
167 |
continue
|
168 |
sendlog.info(' %s: %s\t[%s]' % (key, val, self)) |
169 |
if self.data: |
170 |
sendlog.info('data size:%s\t[%s]' % (len(self.data), self)) |
171 |
if self.LOG_DATA: |
172 |
datasendlog.info(self.data)
|
173 |
else:
|
174 |
sendlog.info('data size:0\t[%s]' % self) |
175 |
sendlog.info('')
|
176 |
|
177 |
def perform(self, conn): |
178 |
"""
|
179 |
:param conn: (httplib connection object)
|
180 |
|
181 |
:returns: (HTTPResponse)
|
182 |
"""
|
183 |
conn.request( |
184 |
method=str(self.method.upper()), |
185 |
url=str(self.path), |
186 |
headers=self.headers,
|
187 |
body=self.data)
|
188 |
self.log()
|
189 |
keep_trying = TIMEOUT |
190 |
while keep_trying > 0: |
191 |
try:
|
192 |
return conn.getresponse()
|
193 |
except ResponseNotReady:
|
194 |
wait = 0.03 * random()
|
195 |
sleep(wait) |
196 |
keep_trying -= wait |
197 |
logmsg = 'Kamaki Timeout %s %s\t[%s]' % (self.method, self.path, self) |
198 |
recvlog.debug(logmsg) |
199 |
raise ClientError('HTTPResponse takes too long - kamaki timeout') |
200 |
|
201 |
|
202 |
class ResponseManager(Logged): |
203 |
"""Manage the http request and handle the response data, headers, etc."""
|
204 |
|
205 |
def __init__(self, request, poolsize=None): |
206 |
"""
|
207 |
:param request: (RequestManager)
|
208 |
"""
|
209 |
self.request = request
|
210 |
self._request_performed = False |
211 |
self.poolsize = poolsize
|
212 |
|
213 |
def _get_response(self): |
214 |
if self._request_performed: |
215 |
return
|
216 |
|
217 |
pool_kw = dict(size=self.poolsize) if self.poolsize else dict() |
218 |
try:
|
219 |
with PooledHTTPConnection(
|
220 |
self.request.netloc, self.request.scheme, |
221 |
**pool_kw) as connection:
|
222 |
self.request.LOG_TOKEN = self.LOG_TOKEN |
223 |
self.request.LOG_DATA = self.LOG_DATA |
224 |
r = self.request.perform(connection)
|
225 |
recvlog.info('[resp: %s] <-- [req: %s]\n' % (r, self.request)) |
226 |
self._request_performed = True |
227 |
self._status_code, self._status = r.status, r.reason |
228 |
recvlog.info( |
229 |
'%d %s\t[p: %s]' % (self.status_code, self.status, self)) |
230 |
self._headers = dict() |
231 |
for k, v in r.getheaders(): |
232 |
if (not self.LOG_TOKEN) and k.lower() == 'x-auth-token': |
233 |
continue
|
234 |
self._headers[k] = v
|
235 |
recvlog.info(' %s: %s\t[p: %s]' % (k, v, self)) |
236 |
self._content = r.read()
|
237 |
recvlog.info('data size: %s\t[p: %s]' % (
|
238 |
len(self._content) if self._content else 0, |
239 |
self))
|
240 |
if self.LOG_DATA and self._content: |
241 |
datarecvlog.info('%s\t[p: %s]' % (self._content, self)) |
242 |
except Exception as err: |
243 |
from traceback import format_stack |
244 |
recvlog.debug('\n'.join(['%s' % type(err)] + format_stack())) |
245 |
raise ClientError(
|
246 |
'Failed while http-connecting to %s (%s)' % (
|
247 |
self.request.url,
|
248 |
err)) |
249 |
|
250 |
@property
|
251 |
def status_code(self): |
252 |
self._get_response()
|
253 |
return self._status_code |
254 |
|
255 |
@property
|
256 |
def status(self): |
257 |
self._get_response()
|
258 |
return self._status |
259 |
|
260 |
@property
|
261 |
def headers(self): |
262 |
self._get_response()
|
263 |
return self._headers |
264 |
|
265 |
@property
|
266 |
def content(self): |
267 |
self._get_response()
|
268 |
return self._content |
269 |
|
270 |
@property
|
271 |
def text(self): |
272 |
"""
|
273 |
:returns: (str) content
|
274 |
"""
|
275 |
self._get_response()
|
276 |
return '%s' % self._content |
277 |
|
278 |
@property
|
279 |
def json(self): |
280 |
"""
|
281 |
:returns: (dict) squeezed from json-formated content
|
282 |
"""
|
283 |
self._get_response()
|
284 |
try:
|
285 |
return loads(self._content) |
286 |
except ValueError as err: |
287 |
raise ClientError('Response not formated in JSON - %s' % err) |
288 |
|
289 |
|
290 |
class SilentEvent(Thread): |
291 |
"""Thread-run method(*args, **kwargs)"""
|
292 |
def __init__(self, method, *args, **kwargs): |
293 |
super(self.__class__, self).__init__() |
294 |
self.method = method
|
295 |
self.args = args
|
296 |
self.kwargs = kwargs
|
297 |
|
298 |
@property
|
299 |
def exception(self): |
300 |
return getattr(self, '_exception', False) |
301 |
|
302 |
@property
|
303 |
def value(self): |
304 |
return getattr(self, '_value', None) |
305 |
|
306 |
def run(self): |
307 |
try:
|
308 |
self._value = self.method(*(self.args), **(self.kwargs)) |
309 |
except Exception as e: |
310 |
recvlog.debug('Thread %s got exception %s\n<%s %s' % (
|
311 |
self,
|
312 |
type(e),
|
313 |
e.status if isinstance(e, ClientError) else '', |
314 |
e)) |
315 |
self._exception = e
|
316 |
|
317 |
|
318 |
class Client(object): |
319 |
|
320 |
MAX_THREADS = 7
|
321 |
DATE_FORMATS = [ |
322 |
'%a %b %d %H:%M:%S %Y',
|
323 |
'%A, %d-%b-%y %H:%M:%S GMT',
|
324 |
'%a, %d %b %Y %H:%M:%S GMT']
|
325 |
LOG_TOKEN = False
|
326 |
LOG_DATA = False
|
327 |
|
328 |
def __init__(self, base_url, token): |
329 |
self.base_url = base_url
|
330 |
self.token = token
|
331 |
self.headers, self.params = dict(), dict() |
332 |
|
333 |
def _init_thread_limit(self, limit=1): |
334 |
assert isinstance(limit, int) and limit > 0, 'Thread limit not a +int' |
335 |
self._thread_limit = limit
|
336 |
self._elapsed_old = 0.0 |
337 |
self._elapsed_new = 0.0 |
338 |
|
339 |
def _watch_thread_limit(self, threadlist): |
340 |
self._thread_limit = getattr(self, '_thread_limit', 1) |
341 |
self._elapsed_new = getattr(self, '_elapsed_new', 0.0) |
342 |
self._elapsed_old = getattr(self, '_elapsed_old', 0.0) |
343 |
recvlog.debug('# running threads: %s' % len(threadlist)) |
344 |
if self._elapsed_old and self._elapsed_old >= self._elapsed_new and ( |
345 |
self._thread_limit < self.MAX_THREADS): |
346 |
self._thread_limit += 1 |
347 |
elif self._elapsed_old <= self._elapsed_new and self._thread_limit > 1: |
348 |
self._thread_limit -= 1 |
349 |
|
350 |
self._elapsed_old = self._elapsed_new |
351 |
if len(threadlist) >= self._thread_limit: |
352 |
self._elapsed_new = 0.0 |
353 |
for thread in threadlist: |
354 |
begin_time = time() |
355 |
thread.join() |
356 |
self._elapsed_new += time() - begin_time
|
357 |
self._elapsed_new = self._elapsed_new / len(threadlist) |
358 |
return []
|
359 |
return threadlist
|
360 |
|
361 |
def _raise_for_status(self, r): |
362 |
clienterrorlog.debug('raise err from [%s] of type[%s]' % (r, type(r))) |
363 |
status_msg = getattr(r, 'status', None) or '' |
364 |
try:
|
365 |
message = '%s %s\n' % (status_msg, r.text)
|
366 |
except:
|
367 |
message = '%s %s\n' % (status_msg, r)
|
368 |
status = getattr(r, 'status_code', getattr(r, 'status', 0)) |
369 |
raise ClientError(message, status=status)
|
370 |
|
371 |
def set_header(self, name, value, iff=True): |
372 |
"""Set a header 'name':'value'"""
|
373 |
if value is not None and iff: |
374 |
self.headers[name] = value
|
375 |
|
376 |
def set_param(self, name, value=None, iff=True): |
377 |
if iff:
|
378 |
self.params[name] = value
|
379 |
|
380 |
def request( |
381 |
self, method, path,
|
382 |
async_headers=dict(), async_params=dict(), |
383 |
**kwargs): |
384 |
"""Commit an HTTP request to base_url/path
|
385 |
Requests are commited to and performed by Request/ResponseManager
|
386 |
These classes perform a lazy http request. Present method, by default,
|
387 |
enforces them to perform the http call. Hint: call present method with
|
388 |
success=None to get a non-performed ResponseManager object.
|
389 |
"""
|
390 |
assert isinstance(method, str) or isinstance(method, unicode) |
391 |
assert method
|
392 |
assert isinstance(path, str) or isinstance(path, unicode) |
393 |
try:
|
394 |
headers = dict(self.headers) |
395 |
headers.update(async_headers) |
396 |
params = dict(self.params) |
397 |
params.update(async_params) |
398 |
success = kwargs.pop('success', 200) |
399 |
data = kwargs.pop('data', None) |
400 |
headers.setdefault('X-Auth-Token', self.token) |
401 |
if 'json' in kwargs: |
402 |
data = dumps(kwargs.pop('json'))
|
403 |
headers.setdefault('Content-Type', 'application/json') |
404 |
if data:
|
405 |
headers.setdefault('Content-Length', '%s' % len(data)) |
406 |
|
407 |
sendlog.debug('\n\nCMT %s@%s\t[%s]', method, self.base_url, self) |
408 |
req = RequestManager( |
409 |
method, self.base_url, path,
|
410 |
data=data, headers=headers, params=params) |
411 |
# req.log()
|
412 |
r = ResponseManager(req) |
413 |
r.LOG_TOKEN, r.LOG_DATA = self.LOG_TOKEN, self.LOG_DATA |
414 |
finally:
|
415 |
self.headers = dict() |
416 |
self.params = dict() |
417 |
|
418 |
if success is not None: |
419 |
# Success can either be an int or a collection
|
420 |
success = (success,) if isinstance(success, int) else success |
421 |
if r.status_code not in success: |
422 |
self._raise_for_status(r)
|
423 |
return r
|
424 |
|
425 |
def delete(self, path, **kwargs): |
426 |
return self.request('delete', path, **kwargs) |
427 |
|
428 |
def get(self, path, **kwargs): |
429 |
return self.request('get', path, **kwargs) |
430 |
|
431 |
def head(self, path, **kwargs): |
432 |
return self.request('head', path, **kwargs) |
433 |
|
434 |
def post(self, path, **kwargs): |
435 |
return self.request('post', path, **kwargs) |
436 |
|
437 |
def put(self, path, **kwargs): |
438 |
return self.request('put', path, **kwargs) |
439 |
|
440 |
def copy(self, path, **kwargs): |
441 |
return self.request('copy', path, **kwargs) |
442 |
|
443 |
def move(self, path, **kwargs): |
444 |
return self.request('move', path, **kwargs) |