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folder/Maildir: Store only relative filename components

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MaildirFolder.messagelist[*]['filename'] was storing the absolute file
paths for all stored emails. While this is convenient, it wastes much
space, as the folder prefix is always the same and it is known to the
MaildirFolder. Just 40 chars in a folder with 100k mails waste >4MB of
space. Adapt the few locations where we need the full path to construct
it dynamically.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>
This commit is contained in:
Sebastian Spaeth 2011-06-10 17:32:40 +02:00 committed by Nicolas Sebrecht
parent c1c200a487
commit e023f190b0
1 changed files with 29 additions and 18 deletions
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47
offlineimap/folder/Maildir.py
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@ -185,27 +185,32 @@ class MaildirFolder(BaseFolder):
return self.messagelist
def getmessage(self, uid):
"""Return the content of the message"""
filename = self.messagelist[uid]['filename']
file = open(filename, 'rt')
filepath = os.path.join(self.getfullname(), filename)
file = open(filepath, 'rt')
retval = file.read()
file.close()
#TODO: WHY are we replacing \r\n with \n here? And why do we
# read it as text?
return retval.replace("\r\n", "\n")
def getmessagetime( self, uid ):
filename = self.messagelist[uid]['filename']
st = os.stat(filename)
filepath = os.path.join(self.getfullname(), filename)
st = os.stat(filepath)
return st.st_mtime
def savemessage(self, uid, content, flags, rtime):
# This function only ever saves to tmp/,
# but it calls savemessageflags() to actually save to cur/ or new/.
self.ui.debug('maildir', 'savemessage: called to write with flags %s and content %s' % \
(repr(flags), repr(content)))
self.ui.debug('maildir', 'savemessage: called to write with flags %s '
'and content %s' % (repr(flags), repr(content)))
if uid < 0:
# We cannot assign a new uid.
return uid
if uid in self.messagelist:
# We already have it.
# We already have it, just update flags.
self.savemessageflags(uid, flags)
return uid
@ -231,7 +236,8 @@ class MaildirFolder(BaseFolder):
else:
break
tmpmessagename = messagename.split(',')[0]
self.ui.debug('maildir', 'savemessage: using temporary name %s' % tmpmessagename)
self.ui.debug('maildir', 'savemessage: using temporary name %s' %\
tmpmessagename)
file = open(os.path.join(tmpdir, tmpmessagename), "wt")
file.write(content)
@ -239,10 +245,10 @@ class MaildirFolder(BaseFolder):
file.flush()
if self.dofsync:
os.fsync(file.fileno())
file.close()
if rtime != None:
os.utime(os.path.join(tmpdir,tmpmessagename), (rtime,rtime))
os.utime(os.path.join(tmpdir, tmpmessagename), (rtime, rtime))
self.ui.debug('maildir', 'savemessage: moving from %s to %s' % \
(tmpmessagename, messagename))
if tmpmessagename != messagename: # then rename it
@ -259,7 +265,8 @@ class MaildirFolder(BaseFolder):
pass
self.messagelist[uid] = {'uid': uid, 'flags': [],
'filename': os.path.join(tmpdir, messagename)}
'filename': os.path.join('tmp', messagename)}
# savemessageflags moves msg to 'cur' or 'new' as appropriate
self.savemessageflags(uid, flags)
self.ui.debug('maildir', 'savemessage: returning uid %d' % uid)
return uid
@ -269,14 +276,14 @@ class MaildirFolder(BaseFolder):
def savemessageflags(self, uid, flags):
oldfilename = self.messagelist[uid]['filename']
newpath, newname = os.path.split(oldfilename)
dir_prefix, newname = os.path.split(oldfilename)
tmpdir = os.path.join(self.getfullname(), 'tmp')
if 'S' in flags:
# If a message has been seen, it goes into the cur
# directory. CR debian#152482, [complete.org #4]
newpath = os.path.join(self.getfullname(), 'cur')
# directory. CR debian#152482
dir_prefix = 'cur'
else:
newpath = os.path.join(self.getfullname(), 'new')
dir_prefix = 'new'
infostr = ':'
infomatch = re.search('(:.*)$', newname)
if infomatch: # If the info string is present..
@ -287,15 +294,16 @@ class MaildirFolder(BaseFolder):
infostr += '2,' + ''.join(flags)
newname += infostr
newfilename = os.path.join(newpath, newname)
newfilename = os.path.join(dir_prefix, newname)
if (newfilename != oldfilename):
os.rename(oldfilename, newfilename)
os.rename(os.path.join(self.getfullname(), oldfilename),
os.path.join(self.getfullname(), newfilename))
self.messagelist[uid]['flags'] = flags
self.messagelist[uid]['filename'] = newfilename
# By now, the message had better not be in tmp/ land!
final_dir, final_name = os.path.split(self.messagelist[uid]['filename'])
assert final_dir != tmpdir
assert final_dir != 'tmp'
def deletemessage(self, uid):
"""Unlinks a message file from the Maildir.
@ -309,13 +317,16 @@ class MaildirFolder(BaseFolder):
return
filename = self.messagelist[uid]['filename']
filepath = os.path.join(self.getfullname(), filename)
try:
os.unlink(filename)
os.unlink(filepath)
except OSError:
# Can't find the file -- maybe already deleted?
newmsglist = self._scanfolder()
if uid in newmsglist: # Nope, try new filename.
os.unlink(newmsglist[uid]['filename'])
filename = newmsglist[uid]['filename']
filepath = os.path.join(self.getfullname(), filename)
os.unlink(filepath)
# Yep -- return.
del(self.messagelist[uid])