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Merge pull request #2816 from bblommers/bugfix/2789

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S3 - Bugfix - Remove possibilty for concurrent access to file content
This commit is contained in:
Steve Pulec 2020-03-19 19:37:14 -05:00 committed by GitHub
commit c13aadf75b
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 13 additions and 4 deletions
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17
moto/s3/models.py
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@ -12,6 +12,7 @@ import codecs
import random
import string
import tempfile
import threading
import sys
import time
import uuid
@ -110,6 +111,7 @@ class FakeKey(BaseModel):
self._value_buffer = tempfile.SpooledTemporaryFile(max_size=max_buffer_size)
self._max_buffer_size = max_buffer_size
self.value = value
self.lock = threading.Lock()
@property
def version_id(self):
@ -117,8 +119,12 @@ class FakeKey(BaseModel):
@property
def value(self):
self.lock.acquire()
self._value_buffer.seek(0)
return self._value_buffer.read()
r = self._value_buffer.read()
r = copy.copy(r)
self.lock.release()
return r
@value.setter
def value(self, new_value):
@ -130,6 +136,7 @@ class FakeKey(BaseModel):
if isinstance(new_value, six.text_type):
new_value = new_value.encode(DEFAULT_TEXT_ENCODING)
self._value_buffer.write(new_value)
self.contentsize = len(new_value)
def copy(self, new_name=None, new_is_versioned=None):
r = copy.deepcopy(self)
@ -157,6 +164,7 @@ class FakeKey(BaseModel):
self.acl = acl
def append_to_value(self, value):
self.contentsize += len(value)
self._value_buffer.seek(0, os.SEEK_END)
self._value_buffer.write(value)
@ -229,8 +237,7 @@ class FakeKey(BaseModel):
@property
def size(self):
self._value_buffer.seek(0, os.SEEK_END)
return self._value_buffer.tell()
return self.contentsize
@property
def storage_class(self):
@ -249,6 +256,7 @@ class FakeKey(BaseModel):
state = self.__dict__.copy()
state["value"] = self.value
del state["_value_buffer"]
del state["lock"]
return state
def __setstate__(self, state):
@ -258,6 +266,7 @@ class FakeKey(BaseModel):
max_size=self._max_buffer_size
)
self.value = state["value"]
self.lock = threading.Lock()
class FakeMultipart(BaseModel):
@ -284,7 +293,7 @@ class FakeMultipart(BaseModel):
etag = etag.replace('"', "")
if part is None or part_etag != etag:
raise InvalidPart()
if last is not None and len(last.value) < UPLOAD_PART_MIN_SIZE:
if last is not None and last.contentsize < UPLOAD_PART_MIN_SIZE:
raise EntityTooSmall()
md5s.extend(decode_hex(part_etag)[0])
total.extend(part.value)