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/usr/share/pyshared/tlslite/FileObject.py is in python-tlslite 0.3.8-1.

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The actual contents of the file can be viewed below.

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"""Class returned by TLSConnection.makefile()."""

class FileObject:
    """This class provides a file object interface to a
    L{tlslite.TLSConnection.TLSConnection}.

    Call makefile() on a TLSConnection to create a FileObject instance.

    This class was copied, with minor modifications, from the
    _fileobject class in socket.py.  Note that fileno() is not
    implemented."""

    default_bufsize = 16384 #TREV: changed from 8192

    def __init__(self, sock, mode='rb', bufsize=-1):
        self._sock = sock
        self.mode = mode # Not actually used in this version
        if bufsize < 0:
            bufsize = self.default_bufsize
        self.bufsize = bufsize
        self.softspace = False
        if bufsize == 0:
            self._rbufsize = 1
        elif bufsize == 1:
            self._rbufsize = self.default_bufsize
        else:
            self._rbufsize = bufsize
        self._wbufsize = bufsize
        self._rbuf = "" # A string
        self._wbuf = [] # A list of strings

    def _getclosed(self):
        return self._sock is not None
    closed = property(_getclosed, doc="True if the file is closed")

    def close(self):
        try:
            if self._sock:
                for result in self._sock._decrefAsync(): #TREV
                    pass
        finally:
            self._sock = None

    def __del__(self):
        try:
            self.close()
        except:
            # close() may fail if __init__ didn't complete
            pass

    def flush(self):
        if self._wbuf:
            buffer = "".join(self._wbuf)
            self._wbuf = []
            self._sock.sendall(buffer)

    #def fileno(self):
    #    raise NotImplementedError() #TREV

    def write(self, data):
        data = str(data) # XXX Should really reject non-string non-buffers
        if not data:
            return
        self._wbuf.append(data)
        if (self._wbufsize == 0 or
            self._wbufsize == 1 and '\n' in data or
            self._get_wbuf_len() >= self._wbufsize):
            self.flush()

    def writelines(self, list):
        # XXX We could do better here for very long lists
        # XXX Should really reject non-string non-buffers
        self._wbuf.extend(filter(None, map(str, list)))
        if (self._wbufsize <= 1 or
            self._get_wbuf_len() >= self._wbufsize):
            self.flush()

    def _get_wbuf_len(self):
        buf_len = 0
        for x in self._wbuf:
            buf_len += len(x)
        return buf_len

    def read(self, size=-1):
        data = self._rbuf
        if size < 0:
            # Read until EOF
            buffers = []
            if data:
                buffers.append(data)
            self._rbuf = ""
            if self._rbufsize <= 1:
                recv_size = self.default_bufsize
            else:
                recv_size = self._rbufsize
            while True:
                data = self._sock.recv(recv_size)
                if not data:
                    break
                buffers.append(data)
            return "".join(buffers)
        else:
            # Read until size bytes or EOF seen, whichever comes first
            buf_len = len(data)
            if buf_len >= size:
                self._rbuf = data[size:]
                return data[:size]
            buffers = []
            if data:
                buffers.append(data)
            self._rbuf = ""
            while True:
                left = size - buf_len
                recv_size = max(self._rbufsize, left)
                data = self._sock.recv(recv_size)
                if not data:
                    break
                buffers.append(data)
                n = len(data)
                if n >= left:
                    self._rbuf = data[left:]
                    buffers[-1] = data[:left]
                    break
                buf_len += n
            return "".join(buffers)

    def readline(self, size=-1):
        data = self._rbuf
        if size < 0:
            # Read until \n or EOF, whichever comes first
            if self._rbufsize <= 1:
                # Speed up unbuffered case
                assert data == ""
                buffers = []
                recv = self._sock.recv
                while data != "\n":
                    data = recv(1)
                    if not data:
                        break
                    buffers.append(data)
                return "".join(buffers)
            nl = data.find('\n')
            if nl >= 0:
                nl += 1
                self._rbuf = data[nl:]
                return data[:nl]
            buffers = []
            if data:
                buffers.append(data)
            self._rbuf = ""
            while True:
                data = self._sock.recv(self._rbufsize)
                if not data:
                    break
                buffers.append(data)
                nl = data.find('\n')
                if nl >= 0:
                    nl += 1
                    self._rbuf = data[nl:]
                    buffers[-1] = data[:nl]
                    break
            return "".join(buffers)
        else:
            # Read until size bytes or \n or EOF seen, whichever comes first
            nl = data.find('\n', 0, size)
            if nl >= 0:
                nl += 1
                self._rbuf = data[nl:]
                return data[:nl]
            buf_len = len(data)
            if buf_len >= size:
                self._rbuf = data[size:]
                return data[:size]
            buffers = []
            if data:
                buffers.append(data)
            self._rbuf = ""
            while True:
                data = self._sock.recv(self._rbufsize)
                if not data:
                    break
                buffers.append(data)
                left = size - buf_len
                nl = data.find('\n', 0, left)
                if nl >= 0:
                    nl += 1
                    self._rbuf = data[nl:]
                    buffers[-1] = data[:nl]
                    break
                n = len(data)
                if n >= left:
                    self._rbuf = data[left:]
                    buffers[-1] = data[:left]
                    break
                buf_len += n
            return "".join(buffers)

    def readlines(self, sizehint=0):
        total = 0
        list = []
        while True:
            line = self.readline()
            if not line:
                break
            list.append(line)
            total += len(line)
            if sizehint and total >= sizehint:
                break
        return list

    # Iterator protocols

    def __iter__(self):
        return self

    def next(self):
        line = self.readline()
        if not line:
            raise StopIteration
        return line