mirror of
https://github.com/falk-werner/webfuse
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make pylint happy
This commit is contained in:
Falk Werner
parent
7559bebb05
commit
a83fcd7260
17
example/provider/python/pylintrc
Normal file
17
example/provider/python/pylintrc
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@ -0,0 +1,17 @@
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[BASIC]
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good-names=i,j,k,ex,Run,_,f,fd
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[MESSAGES CONTROL]
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disable=raw-checker-failed,
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bad-inline-option,
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locally-disabled,
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file-ignored,
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suppressed-message,
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useless-suppression,
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deprecated-pragma,
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use-symbolic-message-instead,
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missing-function-docstring
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@ -1,11 +1,13 @@
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#!/usr/bin/env python3
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"""Example webfuse provider written in python."""
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import asyncio
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import os
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import stat
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import websockets
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import errno
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import getpass
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import websockets
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INVALID_FD = 0xffffffffffffffff
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@ -90,6 +92,8 @@ O_TMPFILE = 0o20200000
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O_TRUNC = 0o00001000
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class MessageReader:
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"""Reads webfuse messages from buffer."""
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def __init__(self, buffer):
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self.buffer = buffer
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self.offset = 0
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@ -101,21 +105,22 @@ class MessageReader:
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def read_bool(self):
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return self.read_u8() == 1
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def read_u32(self):
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value = (self.buffer[self.offset] << 24) + (self.buffer[self.offset + 1] << 16) + (self.buffer[self.offset + 2] << 8) + self.buffer[self.offset + 3]
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value = (self.buffer[self.offset] << 24) + (self.buffer[self.offset + 1] << 16) + \
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(self.buffer[self.offset + 2] << 8) + self.buffer[self.offset + 3]
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self.offset += 4
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return value
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def read_u64(self):
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value = (
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(self.buffer[self.offset ] << 56) +
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(self.buffer[self.offset + 1] << 48) +
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(self.buffer[self.offset + 2] << 40) +
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(self.buffer[self.offset ] << 56) +
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(self.buffer[self.offset + 1] << 48) +
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(self.buffer[self.offset + 2] << 40) +
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(self.buffer[self.offset + 3] << 32) +
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(self.buffer[self.offset + 4] << 24) +
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(self.buffer[self.offset + 5] << 16) +
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(self.buffer[self.offset + 6] << 8) +
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(self.buffer[self.offset + 4] << 24) +
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(self.buffer[self.offset + 5] << 16) +
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(self.buffer[self.offset + 6] << 8) +
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self.buffer[self.offset + 7])
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self.offset += 8
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return value
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@ -144,7 +149,7 @@ class MessageReader:
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def read_rename_flags(self):
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return self.read_u8()
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def read_mode(self):
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value = self.read_u32()
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mode = value & 0o7777
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@ -152,7 +157,7 @@ class MessageReader:
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mode |= stat.S_IFDIR if MODE_DIR == (value & MODE_DIR ) else 0
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mode |= stat.S_IFCHR if MODE_CHR == (value & MODE_CHR ) else 0
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mode |= stat.S_IFBLK if MODE_BLK == (value & MODE_BLK ) else 0
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mode |= stat.S_IFFIFO if MODE_FIFO == (value & MODE_FIFO) else 0
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mode |= stat.S_IFIFO if MODE_FIFO == (value & MODE_FIFO) else 0
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mode |= stat.S_IFLNK if MODE_LNK == (value & MODE_LNK ) else 0
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mode |= stat.S_IFSOCK if MODE_SOCK == (value & MODE_SOCK) else 0
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return mode
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@ -187,14 +192,16 @@ class MessageReader:
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class MessageWriter:
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""""Writes webfuse messages into buffer."""
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def __init__(self, message_id, message_type):
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self.buffer = []
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self.write_u32(message_id)
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self.write_u8(message_type)
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def write_u8(self, value):
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self.buffer.append(value)
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def write_u32(self, value):
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self.buffer.extend([
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(value >> 24) & 0xff,
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@ -217,22 +224,21 @@ class MessageWriter:
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def write_i32(self, value):
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self.write_u32(value & 0xffffffff)
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def write_result(self, value):
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if 0 > value:
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if value in ERRNO:
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value = ERRNO[value]
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value = ERRNO.get(value, value)
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self.write_i32(value)
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def write_str(self, value):
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data = value.encode('utf-8')
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self.write_bytes(data)
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def write_bytes(self, value):
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size = len(value)
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self.write_u32(size)
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self.buffer.extend(value)
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def write_strings(self, values):
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count = len(values)
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self.write_u32(count)
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@ -241,9 +247,11 @@ class MessageWriter:
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def get_bytes(self):
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return bytearray(self.buffer)
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# pylint: disable=too-many-public-methods
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class FilesystemProvider:
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"""Webfuse filesystem provider."""
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def __init__(self, path, url):
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self.root = os.path.abspath(path)
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self.url = url
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@ -253,28 +261,29 @@ class FilesystemProvider:
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0x03: FilesystemProvider.readlink,
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0x04: FilesystemProvider.symlink,
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0x05: FilesystemProvider.link,
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0x06: FilesystemProvider.rename,
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0x07: FilesystemProvider.chmod,
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0x08: FilesystemProvider.chown,
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0x06: FilesystemProvider.rename,
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0x07: FilesystemProvider.chmod,
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0x08: FilesystemProvider.chown,
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0x09: FilesystemProvider.truncate,
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0x0a: FilesystemProvider.fsync,
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0x0b: FilesystemProvider.open,
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0x0c: FilesystemProvider.mknod,
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0x0d: FilesystemProvider.create,
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0x0a: FilesystemProvider.fsync,
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0x0b: FilesystemProvider.open,
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0x0c: FilesystemProvider.mknod,
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0x0d: FilesystemProvider.create,
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0x0e: FilesystemProvider.release,
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0x0f: FilesystemProvider.unlink,
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0x10: FilesystemProvider.read,
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0x11: FilesystemProvider.write,
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0x12: FilesystemProvider.mkdir,
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0x0f: FilesystemProvider.unlink,
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0x10: FilesystemProvider.read,
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0x11: FilesystemProvider.write,
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0x12: FilesystemProvider.mkdir,
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0x13: FilesystemProvider.readdir,
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0x14: FilesystemProvider.rmdir,
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0x15: FilesystemProvider.statfs,
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0x16: FilesystemProvider.utimens,
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0x17: FilesystemProvider.getcreds,
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}
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async def run(self):
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extra_headers = [("X-Auth-Token", "user:bob;token=foo")]
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# pylint: disable-next=no-member
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async with websockets.connect(self.url, extra_headers=extra_headers) as connection:
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while True:
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request = await connection.recv()
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@ -286,7 +295,7 @@ class FilesystemProvider:
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method = self.commands[message_type]
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method(self, reader, writer)
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else:
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print("unknown message type: %d" % message_type)
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print(f"unknown message type: {message_type}")
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response = writer.get_bytes()
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await connection.send(response)
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@ -295,7 +304,7 @@ class FilesystemProvider:
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mode = reader.read_access_mode()
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result = -errno.EACCES
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try:
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if os.access(path, mode) == True:
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if os.access(path, mode) is True:
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result = 0
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except OSError as ex:
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result = -ex.errno
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@ -407,7 +416,7 @@ class FilesystemProvider:
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writer.write_result(result)
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def fsync(self, reader, writer):
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path = reader.read_path(self.root)
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_ = reader.read_path(self.root)
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_ = reader.read_bool()
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fd = reader.read_u64()
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result = 0
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@ -423,7 +432,6 @@ class FilesystemProvider:
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atime_ns = reader.read_u32()
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mtime = reader.read_u64()
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mtime_ns = reader.read_u32()
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fd = reader.read_u64()
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result = 0
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try:
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os.utime(path, (atime, mtime), ns = (atime_ns, mtime_ns))
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@ -431,7 +439,6 @@ class FilesystemProvider:
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result = -ex.errno
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writer.write_result(result)
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def open(self, reader, writer):
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path = reader.read_path(self.root)
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flags = reader.read_openflags()
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@ -442,7 +449,6 @@ class FilesystemProvider:
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return
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writer.write_result(0)
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writer.write_u64(fd)
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def mknod(self, reader, writer):
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path = reader.read_path(self.root)
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@ -452,7 +458,7 @@ class FilesystemProvider:
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try:
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os.mknod(path, mode, rdev)
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except OSError as ex:
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result = -ex.errno
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result = -ex.errno
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writer.write_result(result)
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def create(self, reader, writer):
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@ -466,10 +472,9 @@ class FilesystemProvider:
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return
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writer.write_result(0)
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writer.write_u64(fd)
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pass
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def release(self, reader, writer):
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path = reader.read_path(self.root)
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_ = reader.read_path(self.root)
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fd = reader.read_u64()
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result = 0
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try:
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@ -534,8 +539,8 @@ class FilesystemProvider:
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path = reader.read_path(self.root)
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names = []
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try:
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with os.scandir(path) as it:
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for entry in it:
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with os.scandir(path) as entries:
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for entry in entries:
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names.append(entry.name)
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except OSError as ex:
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writer.write_result(-ex.errno)
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@ -553,7 +558,7 @@ class FilesystemProvider:
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writer.write_result(result)
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def statfs(self, reader, writer):
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path = self.get_path(reader)
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path = reader.read_path(self.root)
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try:
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buffer = os.statvfs(path)
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except OSError as ex:
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@ -569,7 +574,7 @@ class FilesystemProvider:
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writer.write_u64(buffer.f_ffree)
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writer.write_u64(buffer.f_namemax)
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def getcreds(self, reader, writer):
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def getcreds(self, _, writer):
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credentials = getpass.getpass(prompt="credentials: ")
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writer.write_str(credentials)
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