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make pylint happy

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pull/105/head
Falk Werner 1 year ago
parent 7559bebb05
commit a83fcd7260
2 changed files with 66 additions and 44 deletions
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17
example/provider/python/pylintrc
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@ -0,0 +1,17 @@
[BASIC]
good-names=i,j,k,ex,Run,_,f,fd
[MESSAGES CONTROL]
disable=raw-checker-failed,
bad-inline-option,
locally-disabled,
file-ignored,
suppressed-message,
useless-suppression,
deprecated-pragma,
use-symbolic-message-instead,
missing-function-docstring

93
example/provider/python/webfuse_provider.py
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@ -1,11 +1,13 @@
#!/usr/bin/env python3
"""Example webfuse provider written in python."""
import asyncio
import os
import stat
import websockets
import errno
import getpass
import websockets
INVALID_FD = 0xffffffffffffffff
@ -90,6 +92,8 @@ O_TMPFILE = 0o20200000
O_TRUNC = 0o00001000
class MessageReader:
"""Reads webfuse messages from buffer."""
def __init__(self, buffer):
self.buffer = buffer
self.offset = 0
@ -101,21 +105,22 @@ class MessageReader:
def read_bool(self):
return self.read_u8() == 1
def read_u32(self):
value = (self.buffer[self.offset] << 24) + (self.buffer[self.offset + 1] << 16) + (self.buffer[self.offset + 2] << 8) + self.buffer[self.offset + 3]
value = (self.buffer[self.offset] << 24) + (self.buffer[self.offset + 1] << 16) + \
(self.buffer[self.offset + 2] << 8) + self.buffer[self.offset + 3]
self.offset += 4
return value
def read_u64(self):
value = (
(self.buffer[self.offset ] << 56) +
(self.buffer[self.offset + 1] << 48) +
(self.buffer[self.offset + 2] << 40) +
(self.buffer[self.offset ] << 56) +
(self.buffer[self.offset + 1] << 48) +
(self.buffer[self.offset + 2] << 40) +
(self.buffer[self.offset + 3] << 32) +
(self.buffer[self.offset + 4] << 24) +
(self.buffer[self.offset + 5] << 16) +
(self.buffer[self.offset + 6] << 8) +
(self.buffer[self.offset + 4] << 24) +
(self.buffer[self.offset + 5] << 16) +
(self.buffer[self.offset + 6] << 8) +
self.buffer[self.offset + 7])
self.offset += 8
return value
@ -144,7 +149,7 @@ class MessageReader:
def read_rename_flags(self):
return self.read_u8()
def read_mode(self):
value = self.read_u32()
mode = value & 0o7777
@ -152,7 +157,7 @@ class MessageReader:
mode |= stat.S_IFDIR if MODE_DIR == (value & MODE_DIR ) else 0
mode |= stat.S_IFCHR if MODE_CHR == (value & MODE_CHR ) else 0
mode |= stat.S_IFBLK if MODE_BLK == (value & MODE_BLK ) else 0
mode |= stat.S_IFFIFO if MODE_FIFO == (value & MODE_FIFO) else 0
mode |= stat.S_IFIFO if MODE_FIFO == (value & MODE_FIFO) else 0
mode |= stat.S_IFLNK if MODE_LNK == (value & MODE_LNK ) else 0
mode |= stat.S_IFSOCK if MODE_SOCK == (value & MODE_SOCK) else 0
return mode
@ -187,14 +192,16 @@ class MessageReader:
class MessageWriter:
""""Writes webfuse messages into buffer."""
def __init__(self, message_id, message_type):
self.buffer = []
self.write_u32(message_id)
self.write_u8(message_type)
def write_u8(self, value):
self.buffer.append(value)
def write_u32(self, value):
self.buffer.extend([
(value >> 24) & 0xff,
@ -217,22 +224,21 @@ class MessageWriter:
def write_i32(self, value):
self.write_u32(value & 0xffffffff)
def write_result(self, value):
if 0 > value:
if value in ERRNO:
value = ERRNO[value]
value = ERRNO.get(value, value)
self.write_i32(value)
def write_str(self, value):
data = value.encode('utf-8')
self.write_bytes(data)
def write_bytes(self, value):
size = len(value)
self.write_u32(size)
self.buffer.extend(value)
def write_strings(self, values):
count = len(values)
self.write_u32(count)
@ -241,9 +247,11 @@ class MessageWriter:
def get_bytes(self):
return bytearray(self.buffer)
# pylint: disable=too-many-public-methods
class FilesystemProvider:
"""Webfuse filesystem provider."""
def __init__(self, path, url):
self.root = os.path.abspath(path)
self.url = url
@ -253,28 +261,29 @@ class FilesystemProvider:
0x03: FilesystemProvider.readlink,
0x04: FilesystemProvider.symlink,
0x05: FilesystemProvider.link,
0x06: FilesystemProvider.rename,
0x07: FilesystemProvider.chmod,
0x08: FilesystemProvider.chown,
0x06: FilesystemProvider.rename,
0x07: FilesystemProvider.chmod,
0x08: FilesystemProvider.chown,
0x09: FilesystemProvider.truncate,
0x0a: FilesystemProvider.fsync,
0x0b: FilesystemProvider.open,
0x0c: FilesystemProvider.mknod,
0x0d: FilesystemProvider.create,
0x0a: FilesystemProvider.fsync,
0x0b: FilesystemProvider.open,
0x0c: FilesystemProvider.mknod,
0x0d: FilesystemProvider.create,
0x0e: FilesystemProvider.release,
0x0f: FilesystemProvider.unlink,
0x10: FilesystemProvider.read,
0x11: FilesystemProvider.write,
0x12: FilesystemProvider.mkdir,
0x0f: FilesystemProvider.unlink,
0x10: FilesystemProvider.read,
0x11: FilesystemProvider.write,
0x12: FilesystemProvider.mkdir,
0x13: FilesystemProvider.readdir,
0x14: FilesystemProvider.rmdir,
0x15: FilesystemProvider.statfs,
0x16: FilesystemProvider.utimens,
0x17: FilesystemProvider.getcreds,
}
async def run(self):
extra_headers = [("X-Auth-Token", "user:bob;token=foo")]
# pylint: disable-next=no-member
async with websockets.connect(self.url, extra_headers=extra_headers) as connection:
while True:
request = await connection.recv()
@ -286,7 +295,7 @@ class FilesystemProvider:
method = self.commands[message_type]
method(self, reader, writer)
else:
print("unknown message type: %d" % message_type)
print(f"unknown message type: {message_type}")
response = writer.get_bytes()
await connection.send(response)
@ -295,7 +304,7 @@ class FilesystemProvider:
mode = reader.read_access_mode()
result = -errno.EACCES
try:
if os.access(path, mode) == True:
if os.access(path, mode) is True:
result = 0
except OSError as ex:
result = -ex.errno
@ -407,7 +416,7 @@ class FilesystemProvider:
writer.write_result(result)
def fsync(self, reader, writer):
path = reader.read_path(self.root)
_ = reader.read_path(self.root)
_ = reader.read_bool()
fd = reader.read_u64()
result = 0
@ -423,7 +432,6 @@ class FilesystemProvider:
atime_ns = reader.read_u32()
mtime = reader.read_u64()
mtime_ns = reader.read_u32()
fd = reader.read_u64()
result = 0
try:
os.utime(path, (atime, mtime), ns = (atime_ns, mtime_ns))
@ -431,7 +439,6 @@ class FilesystemProvider:
result = -ex.errno
writer.write_result(result)
def open(self, reader, writer):
path = reader.read_path(self.root)
flags = reader.read_openflags()
@ -442,7 +449,6 @@ class FilesystemProvider:
return
writer.write_result(0)
writer.write_u64(fd)
def mknod(self, reader, writer):
path = reader.read_path(self.root)
@ -452,7 +458,7 @@ class FilesystemProvider:
try:
os.mknod(path, mode, rdev)
except OSError as ex:
result = -ex.errno
result = -ex.errno
writer.write_result(result)
def create(self, reader, writer):
@ -466,10 +472,9 @@ class FilesystemProvider:
return
writer.write_result(0)
writer.write_u64(fd)
pass
def release(self, reader, writer):
path = reader.read_path(self.root)
_ = reader.read_path(self.root)
fd = reader.read_u64()
result = 0
try:
@ -534,8 +539,8 @@ class FilesystemProvider:
path = reader.read_path(self.root)
names = []
try:
with os.scandir(path) as it:
for entry in it:
with os.scandir(path) as entries:
for entry in entries:
names.append(entry.name)
except OSError as ex:
writer.write_result(-ex.errno)
@ -553,7 +558,7 @@ class FilesystemProvider:
writer.write_result(result)
def statfs(self, reader, writer):
path = self.get_path(reader)
path = reader.read_path(self.root)
try:
buffer = os.statvfs(path)
except OSError as ex:
@ -569,7 +574,7 @@ class FilesystemProvider:
writer.write_u64(buffer.f_ffree)
writer.write_u64(buffer.f_namemax)
def getcreds(self, reader, writer):
def getcreds(self, _, writer):
credentials = getpass.getpass(prompt="credentials: ")
writer.write_str(credentials)

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