# interpreted as representing official policies, either expressed
# or implied, of GRNET S.A.
-import json
-import logging
-from kamaki.clients.connection import HTTPConnectionError
-from kamaki.clients.connection.kamakicon import KamakiHTTPConnection
+from urllib2 import quote, unquote
+from urlparse import urlparse
+from threading import Thread
+from json import dumps, loads
+from time import time
+from httplib import ResponseNotReady
+from time import sleep
+from random import random
+from logging import getLogger
+
+from objpool.http import PooledHTTPConnection
+
+
+TIMEOUT = 60.0 # seconds
+HTTP_METHODS = ['GET', 'POST', 'PUT', 'HEAD', 'DELETE', 'COPY', 'MOVE']
+
+log = getLogger(__name__)
+sendlog = getLogger('%s.send' % __name__)
+recvlog = getLogger('%s.recv' % __name__)
+
+
+def _encode(v):
+ if v and isinstance(v, unicode):
+ return quote(v.encode('utf-8'))
+ return v
-sendlog = logging.getLogger('clients.send')
-recvlog = logging.getLogger('clients.recv')
class ClientError(Exception):
- def __init__(self, message, status=0, details=''):
- super(ClientError, self).__init__(message, status, details)
- self.message = message
- self.status = status
- self.details = details
+ def __init__(self, message, status=0, details=None):
+ log.debug('ClientError: msg[%s], sts[%s], dtl[%s]' % (
+ message,
+ status,
+ details))
+ try:
+ message += '' if message and message[-1] == '\n' else '\n'
+ serv_stat, sep, new_msg = message.partition('{')
+ new_msg = sep + new_msg[:-1 if new_msg.endswith('\n') else 0]
+ json_msg = loads(new_msg)
+ key = json_msg.keys()[0]
+ serv_stat = serv_stat.strip()
+
+ json_msg = json_msg[key]
+ message = '%s %s (%s)\n' % (
+ serv_stat,
+ key,
+ json_msg['message']) if (
+ 'message' in json_msg) else '%s %s' % (serv_stat, key)
+ status = json_msg.get('code', status)
+ if 'details' in json_msg:
+ if not details:
+ details = []
+ if not isinstance(details, list):
+ details = [details]
+ if json_msg['details']:
+ details.append(json_msg['details'])
+ except Exception:
+ pass
+ finally:
+ while message.endswith('\n\n'):
+ message = message[:-1]
+ super(ClientError, self).__init__(message)
+ self.status = status if isinstance(status, int) else 0
+ self.details = details if details else []
+
+
+class Logged(object):
+
+ LOG_TOKEN = False
+ LOG_DATA = False
+
+
+class RequestManager(Logged):
+ """Handle http request information"""
+
+ def _connection_info(self, url, path, params={}):
+ """ Set self.url to scheme://netloc/?params
+ :param url: (str or unicode) The service url
+
+ :param path: (str or unicode) The service path (url/path)
+
+ :param params: (dict) Parameters to add to final url
+
+ :returns: (scheme, netloc)
+ """
+ url = _encode(str(url)) if url else 'http://127.0.0.1/'
+ url += '' if url.endswith('/') else '/'
+ if path:
+ url += _encode(path[1:] if path.startswith('/') else path)
+ delim = '?'
+ for key, val in params.items():
+ val = _encode(val)
+ url += '%s%s%s' % (delim, key, ('=%s' % val) if val else '')
+ delim = '&'
+ parsed = urlparse(url)
+ self.url = url
+ self.path = parsed.path or '/'
+ if parsed.query:
+ self.path += '?%s' % parsed.query
+ return (parsed.scheme, parsed.netloc)
+
+ def __init__(
+ self, method, url, path,
+ data=None, headers={}, params={}):
+ method = method.upper()
+ assert method in HTTP_METHODS, 'Invalid http method %s' % method
+ if headers:
+ assert isinstance(headers, dict)
+ self.headers = dict(headers)
+ self.method, self.data = method, data
+ self.scheme, self.netloc = self._connection_info(url, path, params)
+
+ def dump_log(self):
+ sendlog.info('%s %s://%s%s\t[%s]' % (
+ self.method, self.scheme, self.netloc, self.path, self))
+ for key, val in self.headers.items():
+ if (not self.LOG_TOKEN) and key.lower() == 'x-auth-token':
+ continue
+ sendlog.info(' %s: %s\t[%s]' % (key, val, self))
+ if self.data:
+ sendlog.info('data size:%s\t[%s]' % (len(self.data), self))
+ if self.LOG_DATA:
+ sendlog.info(self.data)
+ else:
+ sendlog.info('data size:0\t[%s]' % self)
+ sendlog.info('')
+
+ def perform(self, conn):
+ """
+ :param conn: (httplib connection object)
+
+ :returns: (HTTPResponse)
+ """
+ conn.request(
+ method=str(self.method.upper()),
+ url=str(self.path),
+ headers=self.headers,
+ body=self.data)
+ self.dump_log()
+ keep_trying = TIMEOUT
+ while keep_trying > 0:
+ try:
+ return conn.getresponse()
+ except ResponseNotReady:
+ wait = 0.03 * random()
+ sleep(wait)
+ keep_trying -= wait
+ logmsg = 'Kamaki Timeout %s %s\t[%s]' % (self.method, self.path, self)
+ recvlog.debug(logmsg)
+ raise ClientError('HTTPResponse takes too long - kamaki timeout')
+
+
+class ResponseManager(Logged):
+ """Manage the http request and handle the response data, headers, etc."""
+
+ def __init__(self, request, poolsize=None):
+ """
+ :param request: (RequestManager)
+ """
+ self.request = request
+ self._request_performed = False
+ self.poolsize = poolsize
+
+ def _get_response(self):
+ if self._request_performed:
+ return
+
+ pool_kw = dict(size=self.poolsize) if self.poolsize else dict()
+ try:
+ with PooledHTTPConnection(
+ self.request.netloc, self.request.scheme,
+ **pool_kw) as connection:
+ self.request.LOG_TOKEN = self.LOG_TOKEN
+ self.request.LOG_DATA = self.LOG_DATA
+ r = self.request.perform(connection)
+ recvlog.info('\n%s <-- %s <-- [req: %s]\n' % (
+ self, r, self.request))
+ self._request_performed = True
+ self._status_code, self._status = r.status, unquote(r.reason)
+ recvlog.info(
+ '%d %s\t[p: %s]' % (self.status_code, self.status, self))
+ self._headers = dict()
+ for k, v in r.getheaders():
+ if (not self.LOG_TOKEN) and k.lower() == 'x-auth-token':
+ continue
+ v = unquote(v)
+ self._headers[k] = v
+ recvlog.info(' %s: %s\t[p: %s]' % (k, v, self))
+ self._content = r.read()
+ recvlog.info('data size: %s\t[p: %s]' % (
+ len(self._content) if self._content else 0,
+ self))
+ if self.LOG_DATA and self._content:
+ recvlog.info('%s\t[p: %s]' % (self._content, self))
+ except Exception as err:
+ from traceback import format_stack
+ recvlog.debug('\n'.join(['%s' % type(err)] + format_stack()))
+ raise ClientError(
+ 'Failed while http-connecting to %s (%s)' % (
+ self.request.url,
+ err))
+
+ @property
+ def status_code(self):
+ self._get_response()
+ return self._status_code
+
+ @property
+ def status(self):
+ self._get_response()
+ return self._status
+
+ @property
+ def headers(self):
+ self._get_response()
+ return self._headers
+
+ @property
+ def content(self):
+ self._get_response()
+ return self._content
+
+ @property
+ def text(self):
+ """
+ :returns: (str) content
+ """
+ self._get_response()
+ return '%s' % self._content
+
+ @property
+ def json(self):
+ """
+ :returns: (dict) squeezed from json-formated content
+ """
+ self._get_response()
+ try:
+ return loads(self._content)
+ except ValueError as err:
+ raise ClientError('Response not formated in JSON - %s' % err)
+
+
+class SilentEvent(Thread):
+ """Thread-run method(*args, **kwargs)"""
+ def __init__(self, method, *args, **kwargs):
+ super(self.__class__, self).__init__()
+ self.method = method
+ self.args = args
+ self.kwargs = kwargs
+
+ @property
+ def exception(self):
+ return getattr(self, '_exception', False)
+
+ @property
+ def value(self):
+ return getattr(self, '_value', None)
+
+ def run(self):
+ try:
+ self._value = self.method(*(self.args), **(self.kwargs))
+ except Exception as e:
+ recvlog.debug('Thread %s got exception %s\n<%s %s' % (
+ self,
+ type(e),
+ e.status if isinstance(e, ClientError) else '',
+ e))
+ self._exception = e
+
class Client(object):
- def __init__(self, base_url, token, http_client=KamakiHTTPConnection()):
+ MAX_THREADS = 7
+ DATE_FORMATS = [
+ '%a %b %d %H:%M:%S %Y',
+ '%A, %d-%b-%y %H:%M:%S GMT',
+ '%a, %d %b %Y %H:%M:%S GMT']
+ LOG_TOKEN = False
+ LOG_DATA = False
+
+ def __init__(self, base_url, token):
+ assert base_url, 'No base_url for client %s' % self
self.base_url = base_url
self.token = token
- self.headers = {}
- self.DATE_FORMATS = ["%a %b %d %H:%M:%S %Y",
- "%A, %d-%b-%y %H:%M:%S GMT",
- "%a, %d %b %Y %H:%M:%S GMT"]
- self.http_client = http_client
+ self.headers, self.params = dict(), dict()
+
+ def _init_thread_limit(self, limit=1):
+ assert isinstance(limit, int) and limit > 0, 'Thread limit not a +int'
+ self._thread_limit = limit
+ self._elapsed_old = 0.0
+ self._elapsed_new = 0.0
+
+ def _watch_thread_limit(self, threadlist):
+ self._thread_limit = getattr(self, '_thread_limit', 1)
+ self._elapsed_new = getattr(self, '_elapsed_new', 0.0)
+ self._elapsed_old = getattr(self, '_elapsed_old', 0.0)
+ recvlog.debug('# running threads: %s' % len(threadlist))
+ if self._elapsed_old and self._elapsed_old >= self._elapsed_new and (
+ self._thread_limit < self.MAX_THREADS):
+ self._thread_limit += 1
+ elif self._elapsed_old <= self._elapsed_new and self._thread_limit > 1:
+ self._thread_limit -= 1
+
+ self._elapsed_old = self._elapsed_new
+ if len(threadlist) >= self._thread_limit:
+ self._elapsed_new = 0.0
+ for thread in threadlist:
+ begin_time = time()
+ thread.join()
+ self._elapsed_new += time() - begin_time
+ self._elapsed_new = self._elapsed_new / len(threadlist)
+ return []
+ return threadlist
def _raise_for_status(self, r):
- message = "%s" % r.status
+ log.debug('raise err from [%s] of type[%s]' % (r, type(r)))
+ status_msg = getattr(r, 'status', None) or ''
try:
- details = r.text
+ message = '%s %s\n' % (status_msg, r.text)
except:
- details = ''
- raise ClientError(message=message, status=r.status_code, details=details)
+ message = '%s %s\n' % (status_msg, r)
+ status = getattr(r, 'status_code', getattr(r, 'status', 0))
+ raise ClientError(message, status=status)
def set_header(self, name, value, iff=True):
- """Set a header 'name':'value' provided value is not None and iff is True"""
+ """Set a header 'name':'value'"""
if value is not None and iff:
- self.http_client.set_header(name, value)
+ self.headers[name] = unicode(value)
def set_param(self, name, value=None, iff=True):
if iff:
- self.http_client.set_param(name, value)
-
- def set_default_header(self, name, value):
- self.http_client.headers.setdefault(name, value)
-
- def request(self,
- method,
- path,
- async_headers={},
- async_params={},
- **kwargs):
- """In threaded/asynchronous requests, headers and params are not safe
- Therefore, the standard self.set_header/param system can be used only for
- headers and params that are common for all requests. All other params and
- headers should passes as
- @param async_headers
- @async_params
- E.g. in most queries the 'X-Auth-Token' header might be the same for all, but the
- 'Range' header might be different from request to request.
- """
+ self.params[name] = unicode(value)
+ def request(
+ self, method, path,
+ async_headers=dict(), async_params=dict(),
+ **kwargs):
+ """Commit an HTTP request to base_url/path
+ Requests are commited to and performed by Request/ResponseManager
+ These classes perform a lazy http request. Present method, by default,
+ enforces them to perform the http call. Hint: call present method with
+ success=None to get a non-performed ResponseManager object.
+ """
+ assert isinstance(method, str) or isinstance(method, unicode)
+ assert method
+ assert isinstance(path, str) or isinstance(path, unicode)
try:
+ headers = dict(self.headers)
+ headers.update(async_headers)
+ params = dict(self.params)
+ params.update(async_params)
success = kwargs.pop('success', 200)
-
data = kwargs.pop('data', None)
- self.set_default_header('X-Auth-Token', self.token)
-
+ headers.setdefault('X-Auth-Token', self.token)
if 'json' in kwargs:
- data = json.dumps(kwargs.pop('json'))
- self.set_default_header('Content-Type', 'application/json')
+ data = dumps(kwargs.pop('json'))
+ headers.setdefault('Content-Type', 'application/json')
if data:
- self.set_default_header('Content-Length', unicode(len(data)))
+ headers.setdefault('Content-Length', '%s' % len(data))
- self.http_client.url = self.base_url + path
- r = self.http_client.perform_request(method, data, async_headers, async_params)
+ sendlog.debug('\n\nCMT %s@%s\t[%s]', method, self.base_url, self)
+ req = RequestManager(
+ method, self.base_url, path,
+ data=data, headers=headers, params=params)
+ # req.log()
+ r = ResponseManager(req)
+ r.LOG_TOKEN, r.LOG_DATA = self.LOG_TOKEN, self.LOG_DATA
+ finally:
+ self.headers = dict()
+ self.params = dict()
- req = self.http_client
- sendlog.info('%s %s', method, req.url)
- headers = dict(req.headers)
- headers.update(async_headers)
-
- for key, val in headers.items():
- sendlog.info('\t%s: %s', key, val)
- sendlog.info('')
- if data:
- sendlog.info('%s', data)
-
- recvlog.info('%d %s', r.status_code, r.status)
- for key, val in r.headers.items():
- recvlog.info('%s: %s', key, val)
- #if r.content:
- # recvlog.debug(r.content)
-
- if success is not None:
- # Success can either be an in or a collection
- success = (success,) if isinstance(success, int) else success
- if r.status_code not in success:
- r.release()
- self._raise_for_status(r)
- except Exception as err:
- self.http_client.reset_headers()
- self.http_client.reset_params()
- errmsg = getattr(err, 'message', unicode(err))
- errdetails = getattr(err, 'details', '')+' (%s)'%type(err)
- errstatus = getattr(err, 'status', 0)
- raise ClientError(message=errmsg,status=errstatus,details=errdetails)
-
- self.http_client.reset_headers()
- self.http_client.reset_params()
+ if success is not None:
+ # Success can either be an int or a collection
+ success = (success,) if isinstance(success, int) else success
+ if r.status_code not in success:
+ self._raise_for_status(r)
return r
def delete(self, path, **kwargs):
projects / kamaki / blobdiff