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utils.py
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utils.py
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#!/usr/bin/env python
# -*- coding:utf-8 -*-
#
# Author : cold
# E-mail : wh_linux@126.com
# Date : 13/02/28 16:37:58
# Desc : 工具类函数
from __future__ import absolute_import, division
import Queue
import select
import logging
import threading
import functools
import urllib2, urllib, cookielib
import mimetools
import mimetypes
import itertools
from pyxmpp2.mainloop.interfaces import HandlerReady, PrepareAgain
from pyxmpp2.mainloop.base import MainLoopBase
def get_logger(name = None, level = logging.DEBUG):
if not name: name = 'qxbot'
logger = logging.getLogger(name)
hdl = logging.StreamHandler()
fmt = logging.Formatter("%(asctime)s %(levelname)s %(message)s")
hdl.setFormatter(fmt)
handler = hdl
logger.handlers = []
logger.addHandler(handler)
logger.setLevel(level) # change to DEBUG for higher verbosity
logger.propagate = False
return logger
class Form(object):
def __init__(self):
self.form_fields = []
self.files = []
self.boundary = mimetools.choose_boundary()
self.content_type = 'multipart/form-data; boundary=%s' % self.boundary
return
def get_content_type(self):
return self.content_type
def add_field(self, name, value):
self.form_fields.append((str(name), str(value)))
return
def add_file(self, fieldname, filename, fileHandle, mimetype=None):
body = fileHandle.read()
if mimetype is None:
mimetype = ( mimetypes.guess_type(filename)[0]
or
'applicatioin/octet-stream')
self.files.append((fieldname, filename, mimetype, body))
return
def __str__(self):
parts = []
part_boundary = '--' + self.boundary
parts.extend(
[ part_boundary,
'Content-Disposition: form-data; name="%s"' % name,
'',
value,
]
for name, value in self.form_fields)
if self.files:
parts.extend([
part_boundary,
'Content-Disposition: form-data; name="%s"; filename="%s"' %\
(field_name, filename),
'Content-Type: %s' % content_type,
'',
body,
] for field_name, filename, content_type, body in self.files)
flattened = list(itertools.chain(*parts))
flattened.append('--' + self.boundary + '--')
flattened.append('')
return '\r\n'.join(flattened)
class HttpHelper(object):
def __init__(self, url = None, form = None, method = 'GET', jar = None):
self.logger = get_logger()
self._url = url
self._form = form
self._method = method
if jar is None:
self._cookie_file = r'/tmp/cookie.txt'
self._cookiejar = cookielib.MozillaCookieJar(self._cookie_file)
else:
self._cookiejar = jar
self.http_cookie = urllib2.HTTPCookieProcessor( self._cookiejar)
self._opener = urllib2.build_opener(self.http_cookie)
if url:
self.make_request()
def make_request(self):
self.request = urllib2.Request(self._url)
if isinstance(self._form, Form):
self.add_header("Content-Type", self._form.get_content_type())
self.add_header("Content-Length", len(str(self._form)))
self.request.add_data(str(self._form))
elif isinstance(self._form, (dict, list, tuple)):
params = urllib.urlencode(self._form)
if self._method == "GET":
url = "{0}?{1}".format(self._url, params)
self.request = urllib2.Request(url)
else:
self.request = urllib2.Request(self._url, params)
self.request.add_header("Content-Type",
"application/x-www-form-urlencoded")
self.request.add_header("Accept", "*/*")
self.request.add_header("Connection", "keep-alive")
self.request.add_header("Accept-Charset", "UTF-8,*;q=0.5")
self.request.add_header("Accept-Encoding", "gzip,deflate,sdch")
self.request.add_header("Accept-Language", "zh-CN,zh;q=0.8")
self.add_header("User-Agent", "Mozilla/5.0 (X11; Linux x86_64)"
"AppleWebKit/537.11 (KHTML, like Gecko)"
" Chrome/23.0.1271.97 Safari/537.11a")
@property
def cookie(self):
self._cookiejar.save()
return self._cookiejar._cookies
def add_header(self, key, val):
self.request.add_header(key, val)
def change(self, url, form = {}, method = 'GET'):
self._url = url
self._form = form
self._method = method
self.make_request()
return self
def open(self):
try:
params = dict(self._form)
except:
params = self._form
logbody = "{0} {1} params {2!r}".format(self._method, self._url, params)
self.logger.debug(logbody)
res = self._opener.open(self.request, timeout = 3)
return res
def upload_file(filename, path):
""" 上传文件
- `path` 文件路径
"""
form = Form()
filename = filename.encode("utf-8")
form.add_file(fieldname='uploadfile', filename=filename,
fileHandle=open(path))
helper = HttpHelper("http://paste.linuxzen.com", form)
return helper.open()
class EpollMainLoop(MainLoopBase):
""" Main event loop based on the epoll() syscall on Linux system """
READ_ONLY = (select.EPOLLIN | select.EPOLLPRI | select.EPOLLHUP |
select.EPOLLERR |select.EPOLLET)
READ_WRITE = READ_ONLY | select.EPOLLOUT
WRITE_ONLY = select.EPOLLOUT
def __init__(self, settings = None, handlers= None):
self.epoll = select.epoll()
self._handlers = {}
self._unprepared_handlers = {}
self._timeout = None
self._exists_fd = {}
self.logger = get_logger()
MainLoopBase.__init__(self, settings, handlers)
return
def _add_io_handler(self, handler):
self._unprepared_handlers[handler] = None
self._configure_io_handler(handler)
def _configure_io_handler(self, handler):
if self.check_events():
return
if handler in self._unprepared_handlers:
old_fileno = self._unprepared_handlers[handler]
prepared = self._prepare_io_handler(handler)
else:
old_fileno = None
prepared = True
fileno = handler.fileno()
if old_fileno is not None and fileno != old_fileno:
del self._handlers[old_fileno]
self._exists_fd.pop(old_fileno, None)
self.epoll.unregister(old_fileno)
if not prepared:
self._unprepared_handlers[handler] = fileno
if not fileno:
return
self._handlers[fileno] = handler
events = 0
if handler.is_readable():
self.logger.debug(" {0!r} readable".format(handler))
events |= self.READ_ONLY
if handler.is_writable():
self.logger.debug(" {0!r} writable".format(handler))
events |= self.READ_WRITE
if events is not None: # events may be 0
if fileno in self._exists_fd:
self.epoll.modify(fileno, events)
else:
self._exists_fd.update({fileno:1})
self.epoll.register(fileno, events)
def _prepare_io_handler(self, handler):
ret = handler.prepare()
if isinstance(ret, HandlerReady):
del self._unprepared_handlers[handler]
prepared = True
elif isinstance(ret, PrepareAgain):
if ret.timeout is not None:
if self._timeout is not None:
self._timeout = min(self._timeout, ret.timeout)
else:
self._timeout = ret.timeout
prepared = False
else:
raise TypeError("Unexpected result from prepare()")
return prepared
def _remove_io_handler(self, handler):
if handler in self._unprepared_handlers:
old_fileno = self._unprepared_handlers[handler]
del self._unprepared_handlers[handler]
else:
old_fileno = handler.fileno()
if old_fileno is not None:
try:
del self._handlers[old_fileno]
self._exists_fd.pop(old_fileno, None)
self.epoll.unregister(old_fileno)
except KeyError:
pass
def loop_iteration(self, timeout = 60):
next_timeout, sources_handled = self._call_timeout_handlers()
if self.check_events():
return
if self._quit:
return sources_handled
for handler in list(self._unprepared_handlers):
self._configure_io_handler(handler)
if self._timeout is not None:
timeout = min(timeout, self._timeout)
if next_timeout is not None:
timeout = min(next_timeout, timeout)
if timeout == 0:
timeout += 1 # 带有超时的非阻塞,解约资源
events = self.epoll.poll(timeout)
for fd, flag in events:
if flag & (select.EPOLLIN | select.EPOLLPRI | select.EPOLLET):
self._handlers[fd].handle_read()
if flag & (select.EPOLLOUT|select.EPOLLET):
self._handlers[fd].handle_write()
if flag & (select.EPOLLERR | select.EPOLLET):
self._handlers[fd].handle_err()
if flag & (select.EPOLLHUP | select.EPOLLET):
self._handlers[fd].handle_hup()
#if flag & select.EPOLLNVAL:
#self._handlers[fd].handle_nval()
sources_handled += 1
self._configure_io_handler(self._handlers[fd])
return sources_handled
class ThreadPool(object):
""" 线程池
启动相应的线程数,提供接口添加任务,任务为函数
因为线程池时刻都有可能用到所以不做清理
`thread_num` - 初始化线程数
"""
def __init__(self, thread_num = 1):
self._thread_num = thread_num
self._jobs_queue = Queue.Queue()
self._threads = []
return
def add_job(self, func, *args, **kwargs):
""" 添加任务 """
func = functools.partial(func, *args, **kwargs)
self._jobs_queue.put(func)
return
def worker(self):
""" 工作线程
使用Queue阻塞
因为传入的函数已经做了相应的错误处理,
所以在此不做进一步错误处理
"""
while True:
func = self._jobs_queue.get()
func()
def start(self):
""" 根据线程数启动工作线程 """
target = self.worker
for i in xrange(0, self._thread_num):
name = 'thread_pool-' + str(i)
t = threading.Thread(target = target, name = name)
t.setDaemon(True)
self._threads.append(t)
t.start()