mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-28 03:08:14 +00:00
Cancellable md5sum calculation on thread, Ref. gui#2239
This commit is contained in:
parent
6868e20a70
commit
dc377165f2
@ -20,12 +20,17 @@ import os
|
||||
import struct
|
||||
import stat
|
||||
import asyncio
|
||||
from asyncio.futures import CancelledError
|
||||
|
||||
import aiohttp
|
||||
import socket
|
||||
import shutil
|
||||
import re
|
||||
|
||||
import logging
|
||||
|
||||
from gns3server.utils.asyncio import cancellable_wait_run_in_executor
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
from uuid import UUID, uuid4
|
||||
@ -557,7 +562,7 @@ class BaseManager:
|
||||
f.write(packet)
|
||||
os.chmod(tmp_path, stat.S_IWRITE | stat.S_IREAD | stat.S_IEXEC)
|
||||
shutil.move(tmp_path, path)
|
||||
yield from wait_run_in_executor(md5sum, path)
|
||||
yield from cancellable_wait_run_in_executor(md5sum, path)
|
||||
except OSError as e:
|
||||
raise aiohttp.web.HTTPConflict(text="Could not write image: {} because {}".format(filename, e))
|
||||
|
||||
|
@ -20,6 +20,9 @@ import functools
|
||||
import asyncio
|
||||
import sys
|
||||
import os
|
||||
import threading
|
||||
|
||||
from asyncio.futures import CancelledError
|
||||
|
||||
|
||||
@asyncio.coroutine
|
||||
@ -40,6 +43,25 @@ def wait_run_in_executor(func, *args, **kwargs):
|
||||
return future.result()
|
||||
|
||||
|
||||
@asyncio.coroutine
|
||||
def cancellable_wait_run_in_executor(func, *args, **kwargs):
|
||||
"""
|
||||
Run blocking code in a different thread and wait
|
||||
for the result. Support cancellation.
|
||||
|
||||
:param func: Run this function in a different thread
|
||||
:param args: Parameters of the function
|
||||
:param kwargs: Keyword parameters of the function
|
||||
:returns: Return the result of the function
|
||||
"""
|
||||
stopped_event = threading.Event()
|
||||
kwargs['stopped_event'] = stopped_event
|
||||
try:
|
||||
yield from wait_run_in_executor(func, *args, **kwargs)
|
||||
except CancelledError:
|
||||
stopped_event.set()
|
||||
|
||||
|
||||
@asyncio.coroutine
|
||||
def subprocess_check_output(*args, cwd=None, env=None, stderr=False):
|
||||
"""
|
||||
|
@ -143,11 +143,13 @@ def images_directories(type):
|
||||
return [force_unix_path(p) for p in paths if os.path.exists(p)]
|
||||
|
||||
|
||||
def md5sum(path):
|
||||
def md5sum(path, stopped_event=None):
|
||||
"""
|
||||
Return the md5sum of an image and cache it on disk
|
||||
|
||||
:param path: Path to the image
|
||||
:param stopped_event: In case you execute this function on thread and would like to have possibility
|
||||
to cancel operation pass the `threading.Event`
|
||||
:returns: Digest of the image
|
||||
"""
|
||||
|
||||
@ -167,6 +169,9 @@ def md5sum(path):
|
||||
m = hashlib.md5()
|
||||
with open(path, 'rb') as f:
|
||||
while True:
|
||||
if stopped_event is not None and stopped_event.is_set():
|
||||
log.error("MD5 sum calculation of `{}` has stopped due to cancellation".format(path))
|
||||
return
|
||||
buf = f.read(128)
|
||||
if not buf:
|
||||
break
|
||||
|
@ -17,6 +17,7 @@
|
||||
|
||||
import os
|
||||
import sys
|
||||
import threading
|
||||
from unittest.mock import patch
|
||||
|
||||
|
||||
@ -57,6 +58,18 @@ def test_md5sum(tmpdir):
|
||||
assert f.read() == '5d41402abc4b2a76b9719d911017c592'
|
||||
|
||||
|
||||
def test_md5sum_stopped_event(tmpdir):
|
||||
fake_img = str(tmpdir / 'hello_stopped')
|
||||
with open(fake_img, 'w+') as f:
|
||||
f.write('hello')
|
||||
|
||||
event = threading.Event()
|
||||
event.set()
|
||||
|
||||
assert md5sum(fake_img, stopped_event=event) is None
|
||||
assert not os.path.exists(str(tmpdir / 'hello_stopped.md5sum'))
|
||||
|
||||
|
||||
def test_md5sum_existing_digest(tmpdir):
|
||||
fake_img = str(tmpdir / 'hello')
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user