/usr/lib/python2.7/dist-packages/gevent/fileobject.py is in python-gevent 1.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import sys
import os
from gevent.hub import get_hub
from gevent.socket import EBADF
from gevent.os import _read, _write, ignored_errors
from gevent.lock import Semaphore, DummySemaphore
try:
from fcntl import fcntl, F_SETFL
except ImportError:
fcntl = None
__all__ = ['FileObjectPosix',
'FileObjectThread',
'FileObject']
if fcntl is None:
__all__.remove('FileObjectPosix')
else:
from gevent.socket import _fileobject, _get_memory
cancel_wait_ex = IOError(EBADF, 'File descriptor was closed in another greenlet')
from gevent.os import make_nonblocking
try:
from gevent._util import SocketAdapter__del__, noop
except ImportError:
SocketAdapter__del__ = None
noop = None
from types import UnboundMethodType
class NA(object):
def __repr__(self):
return 'N/A'
NA = NA()
class SocketAdapter(object):
"""Socket-like API on top of a file descriptor.
The main purpose of it is to re-use _fileobject to create proper cooperative file objects
from file descriptors on POSIX platforms.
"""
def __init__(self, fileno, mode=None, close=True):
if not isinstance(fileno, (int, long)):
raise TypeError('fileno must be int: %r' % fileno)
self._fileno = fileno
self._mode = mode or 'rb'
self._close = close
self._translate = 'U' in self._mode
make_nonblocking(fileno)
self._eat_newline = False
self.hub = get_hub()
io = self.hub.loop.io
self._read_event = io(fileno, 1)
self._write_event = io(fileno, 2)
def __repr__(self):
if self._fileno is None:
return '<%s at 0x%x closed>' % (self.__class__.__name__, id(self))
else:
args = (self.__class__.__name__, id(self), getattr(self, '_fileno', NA), getattr(self, '_mode', NA))
return '<%s at 0x%x (%r, %r)>' % args
def makefile(self, *args, **kwargs):
return _fileobject(self, *args, **kwargs)
def fileno(self):
result = self._fileno
if result is None:
raise IOError(EBADF, 'Bad file descriptor (%s object is closed)' % self.__class__.__name)
return result
def detach(self):
x = self._fileno
self._fileno = None
return x
def close(self):
self.hub.cancel_wait(self._read_event, cancel_wait_ex)
self.hub.cancel_wait(self._write_event, cancel_wait_ex)
fileno = self._fileno
if fileno is not None:
self._fileno = None
if self._close:
os.close(fileno)
def sendall(self, data):
fileno = self.fileno()
bytes_total = len(data)
bytes_written = 0
while True:
try:
bytes_written += _write(fileno, _get_memory(data, bytes_written))
except (IOError, OSError):
code = sys.exc_info()[1].args[0]
if code not in ignored_errors:
raise
sys.exc_clear()
if bytes_written >= bytes_total:
return
self.hub.wait(self._write_event)
def recv(self, size):
while True:
try:
data = _read(self.fileno(), size)
except (IOError, OSError):
code = sys.exc_info()[1].args[0]
if code not in ignored_errors:
raise
sys.exc_clear()
else:
if not self._translate or not data:
return data
if self._eat_newline:
self._eat_newline = False
if data.startswith('\n'):
data = data[1:]
if not data:
return self.recv(size)
if data.endswith('\r'):
self._eat_newline = True
return self._translate_newlines(data)
self.hub.wait(self._read_event)
def _translate_newlines(self, data):
data = data.replace("\r\n", "\n")
data = data.replace("\r", "\n")
return data
if not SocketAdapter__del__:
def __del__(self, close=os.close):
fileno = self._fileno
if fileno is not None:
close(fileno)
if SocketAdapter__del__:
SocketAdapter.__del__ = UnboundMethodType(SocketAdapter__del__, None, SocketAdapter)
class FileObjectPosix(_fileobject):
def __init__(self, fobj, mode='rb', bufsize=-1, close=True):
if isinstance(fobj, (int, long)):
fileno = fobj
fobj = None
else:
fileno = fobj.fileno()
sock = SocketAdapter(fileno, mode, close=close)
self._fobj = fobj
self._closed = False
_fileobject.__init__(self, sock, mode=mode, bufsize=bufsize, close=close)
def __repr__(self):
if self._sock is None:
return '<%s closed>' % self.__class__.__name__
elif self._fobj is None:
return '<%s %s>' % (self.__class__.__name__, self._sock)
else:
return '<%s %s _fobj=%r>' % (self.__class__.__name__, self._sock, self._fobj)
def close(self):
if self._closed:
# make sure close() is only ran once when called concurrently
# cannot rely on self._sock for this because we need to keep that until flush() is done
return
self._closed = True
sock = self._sock
if sock is None:
return
try:
self.flush()
finally:
if self._fobj is not None or not self._close:
sock.detach()
self._sock = None
self._fobj = None
def __getattr__(self, item):
assert item != '_fobj'
if self._fobj is None:
raise FileObjectClosed
return getattr(self._fobj, item)
if not noop:
def __del__(self):
# disable _fileobject's __del__
pass
if noop:
FileObjectPosix.__del__ = UnboundMethodType(FileObjectPosix, None, noop)
class FileObjectThread(object):
def __init__(self, fobj, *args, **kwargs):
self._close = kwargs.pop('close', True)
self.threadpool = kwargs.pop('threadpool', None)
self.lock = kwargs.pop('lock', True)
if kwargs:
raise TypeError('Unexpected arguments: %r' % kwargs.keys())
if self.lock is True:
self.lock = Semaphore()
elif not self.lock:
self.lock = DummySemaphore()
if not hasattr(self.lock, '__enter__'):
raise TypeError('Expected a Semaphore or boolean, got %r' % type(self.lock))
if isinstance(fobj, (int, long)):
if not self._close:
# we cannot do this, since fdopen object will close the descriptor
raise TypeError('FileObjectThread does not support close=False')
fobj = os.fdopen(fobj, *args)
self._fobj = fobj
if self.threadpool is None:
self.threadpool = get_hub().threadpool
def _apply(self, func, args=None, kwargs=None):
with self.lock:
return self.threadpool.apply_e(BaseException, func, args, kwargs)
def close(self):
fobj = self._fobj
if fobj is None:
return
self._fobj = None
try:
self.flush(_fobj=fobj)
finally:
if self._close:
fobj.close()
def flush(self, _fobj=None):
if _fobj is not None:
fobj = _fobj
else:
fobj = self._fobj
if fobj is None:
raise FileObjectClosed
return self._apply(fobj.flush)
def __repr__(self):
return '<%s _fobj=%r threadpool=%r>' % (self.__class__.__name__, self._fobj, self.threadpool)
def __getattr__(self, item):
assert item != '_fobj'
if self._fobj is None:
raise FileObjectClosed
return getattr(self._fobj, item)
for method in ['read', 'readinto', 'readline', 'readlines', 'write', 'writelines', 'xreadlines']:
exec '''def %s(self, *args, **kwargs):
fobj = self._fobj
if fobj is None:
raise FileObjectClosed
return self._apply(fobj.%s, args, kwargs)
''' % (method, method)
def __iter__(self):
return self
def next(self):
line = self.readline()
if line:
return line
raise StopIteration
FileObjectClosed = IOError(EBADF, 'Bad file descriptor (FileObject was closed)')
try:
FileObject = FileObjectPosix
except NameError:
FileObject = FileObjectThread
class FileObjectBlock(object):
def __init__(self, fobj, *args, **kwargs):
self._close = kwargs.pop('close', True)
if kwargs:
raise TypeError('Unexpected arguments: %r' % kwargs.keys())
if isinstance(fobj, (int, long)):
if not self._close:
# we cannot do this, since fdopen object will close the descriptor
raise TypeError('FileObjectBlock does not support close=False')
fobj = os.fdopen(fobj, *args)
self._fobj = fobj
def __repr__(self):
return '<%s %r>' % (self._fobj, )
def __getattr__(self, item):
assert item != '_fobj'
if self._fobj is None:
raise FileObjectClosed
return getattr(self._fobj, item)
config = os.environ.get('GEVENT_FILE')
if config:
klass = {'thread': 'gevent.fileobject.FileObjectThread',
'posix': 'gevent.fileobject.FileObjectPosix',
'block': 'gevent.fileobject.FileObjectBlock'}.get(config, config)
if klass.startswith('gevent.fileobject.'):
FileObject = globals()[klass.split('.', 2)[-1]]
else:
from gevent.hub import _import
FileObject = _import(klass)
del klass
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