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https://github.com/kovidgoyal/calibre.git
synced 2025-07-09 03:04:10 -04:00
Handle temp files being deleted from under the server causing cover/ebook downloads to stop working
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@ -6,7 +6,7 @@ from __future__ import (unicode_literals, division, absolute_import,
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__license__ = 'GPL v3'
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__copyright__ = '2015, Kovid Goyal <kovid at kovidgoyal.net>'
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import os
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import os, errno
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from binascii import hexlify
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from io import BytesIO
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from threading import Lock
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@ -43,6 +43,17 @@ mtimes = {}
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rename_counter = 0
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def open_for_write(fname):
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try:
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return share_open(fname, 'w+b')
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except EnvironmentError:
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try:
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os.makedirs(os.path.dirname(fname))
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except EnvironmentError:
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pass
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return share_open(fname, 'w+b')
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def create_file_copy(ctx, rd, prefix, library_id, book_id, ext, mtime, copy_func, extra_etag_data=''):
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''' We cannot copy files directly from the library folder to the output
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socket, as this can potentially lock the library for an extended period. So
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@ -78,20 +89,21 @@ def create_file_copy(ctx, rd, prefix, library_id, book_id, ext, mtime, copy_func
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os.remove(dname)
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else:
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os.remove(fname)
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try:
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ans = share_open(fname, 'w+b')
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except EnvironmentError:
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try:
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os.makedirs(base)
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except EnvironmentError:
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pass
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ans = share_open(fname, 'w+b')
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ans = open_for_write(fname)
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mtimes[bname] = mtime
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copy_func(ans)
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ans.seek(0)
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else:
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try:
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ans = share_open(fname, 'rb')
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used_cache = 'yes'
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except EnvironmentError as err:
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if err.errno != errno.ENOENT:
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raise
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ans = open_for_write(fname)
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mtimes[bname] = mtime
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copy_func(ans)
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ans.seek(0)
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if ctx.testing:
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rd.outheaders['Used-Cache'] = used_cache
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rd.outheaders['Tempfile'] = hexlify(fname.encode('utf-8'))
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