| #! /usr/bin/env python3 |
| |
| """Read/write support for Maildir, mbox, MH, Babyl, and MMDF mailboxes.""" |
| |
| # Notes for authors of new mailbox subclasses: |
| # |
| # Remember to fsync() changes to disk before closing a modified file |
| # or returning from a flush() method. See functions _sync_flush() and |
| # _sync_close(). |
| |
| import sys |
| import os |
| import time |
| import calendar |
| import socket |
| import errno |
| import copy |
| import warnings |
| import email |
| import email.message |
| import email.generator |
| import io |
| try: |
| if sys.platform == 'os2emx': |
| # OS/2 EMX fcntl() not adequate |
| raise ImportError |
| import fcntl |
| except ImportError: |
| fcntl = None |
| |
| __all__ = [ 'Mailbox', 'Maildir', 'mbox', 'MH', 'Babyl', 'MMDF', |
| 'Message', 'MaildirMessage', 'mboxMessage', 'MHMessage', |
| 'BabylMessage', 'MMDFMessage'] |
| |
| linesep = os.linesep.encode('ascii') |
| |
| class Mailbox: |
| """A group of messages in a particular place.""" |
| |
| def __init__(self, path, factory=None, create=True): |
| """Initialize a Mailbox instance.""" |
| self._path = os.path.abspath(os.path.expanduser(path)) |
| self._factory = factory |
| |
| def add(self, message): |
| """Add message and return assigned key.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def remove(self, key): |
| """Remove the keyed message; raise KeyError if it doesn't exist.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def __delitem__(self, key): |
| self.remove(key) |
| |
| def discard(self, key): |
| """If the keyed message exists, remove it.""" |
| try: |
| self.remove(key) |
| except KeyError: |
| pass |
| |
| def __setitem__(self, key, message): |
| """Replace the keyed message; raise KeyError if it doesn't exist.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def get(self, key, default=None): |
| """Return the keyed message, or default if it doesn't exist.""" |
| try: |
| return self.__getitem__(key) |
| except KeyError: |
| return default |
| |
| def __getitem__(self, key): |
| """Return the keyed message; raise KeyError if it doesn't exist.""" |
| if not self._factory: |
| return self.get_message(key) |
| else: |
| return self._factory(self.get_file(key)) |
| |
| def get_message(self, key): |
| """Return a Message representation or raise a KeyError.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def get_string(self, key): |
| """Return a string representation or raise a KeyError. |
| |
| Uses email.message.Message to create a 7bit clean string |
| representation of the message.""" |
| return email.message_from_bytes(self.get_bytes(key)).as_string() |
| |
| def get_bytes(self, key): |
| """Return a byte string representation or raise a KeyError.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def get_file(self, key): |
| """Return a file-like representation or raise a KeyError.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def iterkeys(self): |
| """Return an iterator over keys.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def keys(self): |
| """Return a list of keys.""" |
| return list(self.iterkeys()) |
| |
| def itervalues(self): |
| """Return an iterator over all messages.""" |
| for key in self.keys(): |
| try: |
| value = self[key] |
| except KeyError: |
| continue |
| yield value |
| |
| def __iter__(self): |
| return self.itervalues() |
| |
| def values(self): |
| """Return a list of messages. Memory intensive.""" |
| return list(self.itervalues()) |
| |
| def iteritems(self): |
| """Return an iterator over (key, message) tuples.""" |
| for key in self.keys(): |
| try: |
| value = self[key] |
| except KeyError: |
| continue |
| yield (key, value) |
| |
| def items(self): |
| """Return a list of (key, message) tuples. Memory intensive.""" |
| return list(self.iteritems()) |
| |
| def __contains__(self, key): |
| """Return True if the keyed message exists, False otherwise.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def __len__(self): |
| """Return a count of messages in the mailbox.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def clear(self): |
| """Delete all messages.""" |
| for key in self.keys(): |
| self.discard(key) |
| |
| def pop(self, key, default=None): |
| """Delete the keyed message and return it, or default.""" |
| try: |
| result = self[key] |
| except KeyError: |
| return default |
| self.discard(key) |
| return result |
| |
| def popitem(self): |
| """Delete an arbitrary (key, message) pair and return it.""" |
| for key in self.keys(): |
| return (key, self.pop(key)) # This is only run once. |
| else: |
| raise KeyError('No messages in mailbox') |
| |
| def update(self, arg=None): |
| """Change the messages that correspond to certain keys.""" |
| if hasattr(arg, 'iteritems'): |
| source = arg.items() |
| elif hasattr(arg, 'items'): |
| source = arg.items() |
| else: |
| source = arg |
| bad_key = False |
| for key, message in source: |
| try: |
| self[key] = message |
| except KeyError: |
| bad_key = True |
| if bad_key: |
| raise KeyError('No message with key(s)') |
| |
| def flush(self): |
| """Write any pending changes to the disk.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def lock(self): |
| """Lock the mailbox.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def unlock(self): |
| """Unlock the mailbox if it is locked.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def close(self): |
| """Flush and close the mailbox.""" |
| raise NotImplementedError('Method must be implemented by subclass') |
| |
| def _string_to_bytes(self, message): |
| # If a message is not 7bit clean, we refuse to handle it since it |
| # likely came from reading invalid messages in text mode, and that way |
| # lies mojibake. |
| try: |
| return message.encode('ascii') |
| except UnicodeError: |
| raise ValueError("String input must be ASCII-only; " |
| "use bytes or a Message instead") |
| |
| def _dump_message(self, message, target, mangle_from_=False): |
| # This assumes the target file is open in binary mode. |
| """Dump message contents to target file.""" |
| if isinstance(message, email.message.Message): |
| buffer = io.BytesIO() |
| gen = email.generator.BytesGenerator(buffer, mangle_from_, 0) |
| gen.flatten(message) |
| buffer.seek(0) |
| data = buffer.read() |
| data = data.replace(b'\n', linesep) |
| target.write(data) |
| elif isinstance(message, (str, bytes, io.StringIO)): |
| if isinstance(message, io.StringIO): |
| warnings.warn("Use of StringIO input is deprecated, " |
| "use BytesIO instead", DeprecationWarning, 3) |
| message = message.getvalue() |
| if isinstance(message, str): |
| message = self._string_to_bytes(message) |
| if mangle_from_: |
| message = message.replace(b'\nFrom ', b'\n>From ') |
| message = message.replace(b'\n', linesep) |
| target.write(message) |
| elif hasattr(message, 'read'): |
| if hasattr(message, 'buffer'): |
| warnings.warn("Use of text mode files is deprecated, " |
| "use a binary mode file instead", DeprecationWarning, 3) |
| message = message.buffer |
| while True: |
| line = message.readline() |
| # Universal newline support. |
| if line.endswith(b'\r\n'): |
| line = line[:-2] + b'\n' |
| elif line.endswith(b'\r'): |
| line = line[:-1] + b'\n' |
| if not line: |
| break |
| if mangle_from_ and line.startswith(b'From '): |
| line = b'>From ' + line[5:] |
| line = line.replace(b'\n', linesep) |
| target.write(line) |
| else: |
| raise TypeError('Invalid message type: %s' % type(message)) |
| |
| |
| class Maildir(Mailbox): |
| """A qmail-style Maildir mailbox.""" |
| |
| colon = ':' |
| |
| def __init__(self, dirname, factory=None, create=True): |
| """Initialize a Maildir instance.""" |
| Mailbox.__init__(self, dirname, factory, create) |
| if not os.path.exists(self._path): |
| if create: |
| os.mkdir(self._path, 0o700) |
| os.mkdir(os.path.join(self._path, 'tmp'), 0o700) |
| os.mkdir(os.path.join(self._path, 'new'), 0o700) |
| os.mkdir(os.path.join(self._path, 'cur'), 0o700) |
| else: |
| raise NoSuchMailboxError(self._path) |
| self._toc = {} |
| self._last_read = None # Records last time we read cur/new |
| # NOTE: we manually invalidate _last_read each time we do any |
| # modifications ourselves, otherwise we might get tripped up by |
| # bogus mtime behaviour on some systems (see issue #6896). |
| |
| def add(self, message): |
| """Add message and return assigned key.""" |
| tmp_file = self._create_tmp() |
| try: |
| self._dump_message(message, tmp_file) |
| except BaseException: |
| tmp_file.close() |
| os.remove(tmp_file.name) |
| raise |
| _sync_close(tmp_file) |
| if isinstance(message, MaildirMessage): |
| subdir = message.get_subdir() |
| suffix = self.colon + message.get_info() |
| if suffix == self.colon: |
| suffix = '' |
| else: |
| subdir = 'new' |
| suffix = '' |
| uniq = os.path.basename(tmp_file.name).split(self.colon)[0] |
| dest = os.path.join(self._path, subdir, uniq + suffix) |
| try: |
| if hasattr(os, 'link'): |
| os.link(tmp_file.name, dest) |
| os.remove(tmp_file.name) |
| else: |
| os.rename(tmp_file.name, dest) |
| except OSError as e: |
| os.remove(tmp_file.name) |
| if e.errno == errno.EEXIST: |
| raise ExternalClashError('Name clash with existing message: %s' |
| % dest) |
| else: |
| raise |
| if isinstance(message, MaildirMessage): |
| os.utime(dest, (os.path.getatime(dest), message.get_date())) |
| # Invalidate cached toc |
| self._last_read = None |
| return uniq |
| |
| def remove(self, key): |
| """Remove the keyed message; raise KeyError if it doesn't exist.""" |
| os.remove(os.path.join(self._path, self._lookup(key))) |
| # Invalidate cached toc (only on success) |
| self._last_read = None |
| |
| def discard(self, key): |
| """If the keyed message exists, remove it.""" |
| # This overrides an inapplicable implementation in the superclass. |
| try: |
| self.remove(key) |
| except KeyError: |
| pass |
| except OSError as e: |
| if e.errno != errno.ENOENT: |
| raise |
| |
| def __setitem__(self, key, message): |
| """Replace the keyed message; raise KeyError if it doesn't exist.""" |
| old_subpath = self._lookup(key) |
| temp_key = self.add(message) |
| temp_subpath = self._lookup(temp_key) |
| if isinstance(message, MaildirMessage): |
| # temp's subdir and suffix were specified by message. |
| dominant_subpath = temp_subpath |
| else: |
| # temp's subdir and suffix were defaults from add(). |
| dominant_subpath = old_subpath |
| subdir = os.path.dirname(dominant_subpath) |
| if self.colon in dominant_subpath: |
| suffix = self.colon + dominant_subpath.split(self.colon)[-1] |
| else: |
| suffix = '' |
| self.discard(key) |
| new_path = os.path.join(self._path, subdir, key + suffix) |
| os.rename(os.path.join(self._path, temp_subpath), new_path) |
| if isinstance(message, MaildirMessage): |
| os.utime(new_path, (os.path.getatime(new_path), |
| message.get_date())) |
| # Invalidate cached toc |
| self._last_read = None |
| |
| def get_message(self, key): |
| """Return a Message representation or raise a KeyError.""" |
| subpath = self._lookup(key) |
| f = open(os.path.join(self._path, subpath), 'rb') |
| try: |
| if self._factory: |
| msg = self._factory(f) |
| else: |
| msg = MaildirMessage(f) |
| finally: |
| f.close() |
| subdir, name = os.path.split(subpath) |
| msg.set_subdir(subdir) |
| if self.colon in name: |
| msg.set_info(name.split(self.colon)[-1]) |
| msg.set_date(os.path.getmtime(os.path.join(self._path, subpath))) |
| return msg |
| |
| def get_bytes(self, key): |
| """Return a bytes representation or raise a KeyError.""" |
| f = open(os.path.join(self._path, self._lookup(key)), 'rb') |
| try: |
| return f.read().replace(linesep, b'\n') |
| finally: |
| f.close() |
| |
| def get_file(self, key): |
| """Return a file-like representation or raise a KeyError.""" |
| f = open(os.path.join(self._path, self._lookup(key)), 'rb') |
| return _ProxyFile(f) |
| |
| def iterkeys(self): |
| """Return an iterator over keys.""" |
| self._refresh() |
| for key in self._toc: |
| try: |
| self._lookup(key) |
| except KeyError: |
| continue |
| yield key |
| |
| def __contains__(self, key): |
| """Return True if the keyed message exists, False otherwise.""" |
| self._refresh() |
| return key in self._toc |
| |
| def __len__(self): |
| """Return a count of messages in the mailbox.""" |
| self._refresh() |
| return len(self._toc) |
| |
| def flush(self): |
| """Write any pending changes to disk.""" |
| # Maildir changes are always written immediately, so there's nothing |
| # to do except invalidate our cached toc. |
| self._last_read = None |
| |
| def lock(self): |
| """Lock the mailbox.""" |
| return |
| |
| def unlock(self): |
| """Unlock the mailbox if it is locked.""" |
| return |
| |
| def close(self): |
| """Flush and close the mailbox.""" |
| return |
| |
| def list_folders(self): |
| """Return a list of folder names.""" |
| result = [] |
| for entry in os.listdir(self._path): |
| if len(entry) > 1 and entry[0] == '.' and \ |
| os.path.isdir(os.path.join(self._path, entry)): |
| result.append(entry[1:]) |
| return result |
| |
| def get_folder(self, folder): |
| """Return a Maildir instance for the named folder.""" |
| return Maildir(os.path.join(self._path, '.' + folder), |
| factory=self._factory, |
| create=False) |
| |
| def add_folder(self, folder): |
| """Create a folder and return a Maildir instance representing it.""" |
| path = os.path.join(self._path, '.' + folder) |
| result = Maildir(path, factory=self._factory) |
| maildirfolder_path = os.path.join(path, 'maildirfolder') |
| if not os.path.exists(maildirfolder_path): |
| os.close(os.open(maildirfolder_path, os.O_CREAT | os.O_WRONLY, |
| 0o666)) |
| return result |
| |
| def remove_folder(self, folder): |
| """Delete the named folder, which must be empty.""" |
| path = os.path.join(self._path, '.' + folder) |
| for entry in os.listdir(os.path.join(path, 'new')) + \ |
| os.listdir(os.path.join(path, 'cur')): |
| if len(entry) < 1 or entry[0] != '.': |
| raise NotEmptyError('Folder contains message(s): %s' % folder) |
| for entry in os.listdir(path): |
| if entry != 'new' and entry != 'cur' and entry != 'tmp' and \ |
| os.path.isdir(os.path.join(path, entry)): |
| raise NotEmptyError("Folder contains subdirectory '%s': %s" % |
| (folder, entry)) |
| for root, dirs, files in os.walk(path, topdown=False): |
| for entry in files: |
| os.remove(os.path.join(root, entry)) |
| for entry in dirs: |
| os.rmdir(os.path.join(root, entry)) |
| os.rmdir(path) |
| |
| def clean(self): |
| """Delete old files in "tmp".""" |
| now = time.time() |
| for entry in os.listdir(os.path.join(self._path, 'tmp')): |
| path = os.path.join(self._path, 'tmp', entry) |
| if now - os.path.getatime(path) > 129600: # 60 * 60 * 36 |
| os.remove(path) |
| |
| _count = 1 # This is used to generate unique file names. |
| |
| def _create_tmp(self): |
| """Create a file in the tmp subdirectory and open and return it.""" |
| now = time.time() |
| hostname = socket.gethostname() |
| if '/' in hostname: |
| hostname = hostname.replace('/', r'\057') |
| if ':' in hostname: |
| hostname = hostname.replace(':', r'\072') |
| uniq = "%s.M%sP%sQ%s.%s" % (int(now), int(now % 1 * 1e6), os.getpid(), |
| Maildir._count, hostname) |
| path = os.path.join(self._path, 'tmp', uniq) |
| try: |
| os.stat(path) |
| except OSError as e: |
| if e.errno == errno.ENOENT: |
| Maildir._count += 1 |
| try: |
| return _create_carefully(path) |
| except OSError as e: |
| if e.errno != errno.EEXIST: |
| raise |
| else: |
| raise |
| |
| # Fall through to here if stat succeeded or open raised EEXIST. |
| raise ExternalClashError('Name clash prevented file creation: %s' % |
| path) |
| |
| def _refresh(self): |
| """Update table of contents mapping.""" |
| if self._last_read is not None: |
| for subdir in ('new', 'cur'): |
| mtime = os.path.getmtime(os.path.join(self._path, subdir)) |
| if mtime > self._last_read: |
| break |
| else: |
| return |
| |
| # We record the current time - 1sec so that, if _refresh() is called |
| # again in the same second, we will always re-read the mailbox |
| # just in case it's been modified. (os.path.mtime() only has |
| # 1sec resolution.) This results in a few unnecessary re-reads |
| # when _refresh() is called multiple times in the same second, |
| # but once the clock ticks over, we will only re-read as needed. |
| now = time.time() - 1 |
| |
| self._toc = {} |
| def update_dir (subdir): |
| path = os.path.join(self._path, subdir) |
| for entry in os.listdir(path): |
| p = os.path.join(path, entry) |
| if os.path.isdir(p): |
| continue |
| uniq = entry.split(self.colon)[0] |
| self._toc[uniq] = os.path.join(subdir, entry) |
| |
| update_dir('new') |
| update_dir('cur') |
| |
| self._last_read = now |
| |
| def _lookup(self, key): |
| """Use TOC to return subpath for given key, or raise a KeyError.""" |
| try: |
| if os.path.exists(os.path.join(self._path, self._toc[key])): |
| return self._toc[key] |
| except KeyError: |
| pass |
| self._refresh() |
| try: |
| return self._toc[key] |
| except KeyError: |
| raise KeyError('No message with key: %s' % key) |
| |
| # This method is for backward compatibility only. |
| def next(self): |
| """Return the next message in a one-time iteration.""" |
| if not hasattr(self, '_onetime_keys'): |
| self._onetime_keys = iter(self.keys()) |
| while True: |
| try: |
| return self[next(self._onetime_keys)] |
| except StopIteration: |
| return None |
| except KeyError: |
| continue |
| |
| |
| class _singlefileMailbox(Mailbox): |
| """A single-file mailbox.""" |
| |
| def __init__(self, path, factory=None, create=True): |
| """Initialize a single-file mailbox.""" |
| Mailbox.__init__(self, path, factory, create) |
| try: |
| f = open(self._path, 'rb+') |
| except IOError as e: |
| if e.errno == errno.ENOENT: |
| if create: |
| f = open(self._path, 'wb+') |
| else: |
| raise NoSuchMailboxError(self._path) |
| elif e.errno == errno.EACCES: |
| f = open(self._path, 'rb') |
| else: |
| raise |
| self._file = f |
| self._toc = None |
| self._next_key = 0 |
| self._pending = False # No changes require rewriting the file. |
| self._locked = False |
| self._file_length = None # Used to record mailbox size |
| |
| def add(self, message): |
| """Add message and return assigned key.""" |
| self._lookup() |
| self._toc[self._next_key] = self._append_message(message) |
| self._next_key += 1 |
| self._pending = True |
| return self._next_key - 1 |
| |
| def remove(self, key): |
| """Remove the keyed message; raise KeyError if it doesn't exist.""" |
| self._lookup(key) |
| del self._toc[key] |
| self._pending = True |
| |
| def __setitem__(self, key, message): |
| """Replace the keyed message; raise KeyError if it doesn't exist.""" |
| self._lookup(key) |
| self._toc[key] = self._append_message(message) |
| self._pending = True |
| |
| def iterkeys(self): |
| """Return an iterator over keys.""" |
| self._lookup() |
| for key in self._toc.keys(): |
| yield key |
| |
| def __contains__(self, key): |
| """Return True if the keyed message exists, False otherwise.""" |
| self._lookup() |
| return key in self._toc |
| |
| def __len__(self): |
| """Return a count of messages in the mailbox.""" |
| self._lookup() |
| return len(self._toc) |
| |
| def lock(self): |
| """Lock the mailbox.""" |
| if not self._locked: |
| _lock_file(self._file) |
| self._locked = True |
| |
| def unlock(self): |
| """Unlock the mailbox if it is locked.""" |
| if self._locked: |
| _unlock_file(self._file) |
| self._locked = False |
| |
| def flush(self): |
| """Write any pending changes to disk.""" |
| if not self._pending: |
| return |
| |
| # In order to be writing anything out at all, self._toc must |
| # already have been generated (and presumably has been modified |
| # by adding or deleting an item). |
| assert self._toc is not None |
| |
| # Check length of self._file; if it's changed, some other process |
| # has modified the mailbox since we scanned it. |
| self._file.seek(0, 2) |
| cur_len = self._file.tell() |
| if cur_len != self._file_length: |
| raise ExternalClashError('Size of mailbox file changed ' |
| '(expected %i, found %i)' % |
| (self._file_length, cur_len)) |
| |
| new_file = _create_temporary(self._path) |
| try: |
| new_toc = {} |
| self._pre_mailbox_hook(new_file) |
| for key in sorted(self._toc.keys()): |
| start, stop = self._toc[key] |
| self._file.seek(start) |
| self._pre_message_hook(new_file) |
| new_start = new_file.tell() |
| while True: |
| buffer = self._file.read(min(4096, |
| stop - self._file.tell())) |
| if not buffer: |
| break |
| new_file.write(buffer) |
| new_toc[key] = (new_start, new_file.tell()) |
| self._post_message_hook(new_file) |
| except: |
| new_file.close() |
| os.remove(new_file.name) |
| raise |
| _sync_close(new_file) |
| # self._file is about to get replaced, so no need to sync. |
| self._file.close() |
| try: |
| os.rename(new_file.name, self._path) |
| except OSError as e: |
| if e.errno == errno.EEXIST or \ |
| (os.name == 'os2' and e.errno == errno.EACCES): |
| os.remove(self._path) |
| os.rename(new_file.name, self._path) |
| else: |
| raise |
| self._file = open(self._path, 'rb+') |
| self._toc = new_toc |
| self._pending = False |
| if self._locked: |
| _lock_file(self._file, dotlock=False) |
| |
| def _pre_mailbox_hook(self, f): |
| """Called before writing the mailbox to file f.""" |
| return |
| |
| def _pre_message_hook(self, f): |
| """Called before writing each message to file f.""" |
| return |
| |
| def _post_message_hook(self, f): |
| """Called after writing each message to file f.""" |
| return |
| |
| def close(self): |
| """Flush and close the mailbox.""" |
| self.flush() |
| if self._locked: |
| self.unlock() |
| self._file.close() # Sync has been done by self.flush() above. |
| |
| def _lookup(self, key=None): |
| """Return (start, stop) or raise KeyError.""" |
| if self._toc is None: |
| self._generate_toc() |
| if key is not None: |
| try: |
| return self._toc[key] |
| except KeyError: |
| raise KeyError('No message with key: %s' % key) |
| |
| def _append_message(self, message): |
| """Append message to mailbox and return (start, stop) offsets.""" |
| self._file.seek(0, 2) |
| before = self._file.tell() |
| try: |
| self._pre_message_hook(self._file) |
| offsets = self._install_message(message) |
| self._post_message_hook(self._file) |
| except BaseException: |
| self._file.truncate(before) |
| raise |
| self._file.flush() |
| self._file_length = self._file.tell() # Record current length of mailbox |
| return offsets |
| |
| |
| |
| class _mboxMMDF(_singlefileMailbox): |
| """An mbox or MMDF mailbox.""" |
| |
| _mangle_from_ = True |
| |
| def get_message(self, key): |
| """Return a Message representation or raise a KeyError.""" |
| start, stop = self._lookup(key) |
| self._file.seek(start) |
| from_line = self._file.readline().replace(linesep, b'') |
| string = self._file.read(stop - self._file.tell()) |
| msg = self._message_factory(string.replace(linesep, b'\n')) |
| msg.set_from(from_line[5:].decode('ascii')) |
| return msg |
| |
| def get_string(self, key, from_=False): |
| """Return a string representation or raise a KeyError.""" |
| return email.message_from_bytes( |
| self.get_bytes(key)).as_string(unixfrom=from_) |
| |
| def get_bytes(self, key, from_=False): |
| """Return a string representation or raise a KeyError.""" |
| start, stop = self._lookup(key) |
| self._file.seek(start) |
| if not from_: |
| self._file.readline() |
| string = self._file.read(stop - self._file.tell()) |
| return string.replace(linesep, b'\n') |
| |
| def get_file(self, key, from_=False): |
| """Return a file-like representation or raise a KeyError.""" |
| start, stop = self._lookup(key) |
| self._file.seek(start) |
| if not from_: |
| self._file.readline() |
| return _PartialFile(self._file, self._file.tell(), stop) |
| |
| def _install_message(self, message): |
| """Format a message and blindly write to self._file.""" |
| from_line = None |
| if isinstance(message, str): |
| message = self._string_to_bytes(message) |
| if isinstance(message, bytes) and message.startswith(b'From '): |
| newline = message.find(b'\n') |
| if newline != -1: |
| from_line = message[:newline] |
| message = message[newline + 1:] |
| else: |
| from_line = message |
| message = b'' |
| elif isinstance(message, _mboxMMDFMessage): |
| author = message.get_from().encode('ascii') |
| from_line = b'From ' + author |
| elif isinstance(message, email.message.Message): |
| from_line = message.get_unixfrom() # May be None. |
| if from_line is not None: |
| from_line = from_line.encode('ascii') |
| if from_line is None: |
| from_line = b'From MAILER-DAEMON ' + time.asctime(time.gmtime()).encode() |
| start = self._file.tell() |
| self._file.write(from_line + linesep) |
| self._dump_message(message, self._file, self._mangle_from_) |
| stop = self._file.tell() |
| return (start, stop) |
| |
| |
| class mbox(_mboxMMDF): |
| """A classic mbox mailbox.""" |
| |
| _mangle_from_ = True |
| |
| def __init__(self, path, factory=None, create=True): |
| """Initialize an mbox mailbox.""" |
| self._message_factory = mboxMessage |
| _mboxMMDF.__init__(self, path, factory, create) |
| |
| def _pre_message_hook(self, f): |
| """Called before writing each message to file f.""" |
| if f.tell() != 0: |
| f.write(linesep) |
| |
| def _generate_toc(self): |
| """Generate key-to-(start, stop) table of contents.""" |
| starts, stops = [], [] |
| self._file.seek(0) |
| while True: |
| line_pos = self._file.tell() |
| line = self._file.readline() |
| if line.startswith(b'From '): |
| if len(stops) < len(starts): |
| stops.append(line_pos - len(linesep)) |
| starts.append(line_pos) |
| elif not line: |
| stops.append(line_pos) |
| break |
| self._toc = dict(enumerate(zip(starts, stops))) |
| self._next_key = len(self._toc) |
| self._file_length = self._file.tell() |
| |
| |
| class MMDF(_mboxMMDF): |
| """An MMDF mailbox.""" |
| |
| def __init__(self, path, factory=None, create=True): |
| """Initialize an MMDF mailbox.""" |
| self._message_factory = MMDFMessage |
| _mboxMMDF.__init__(self, path, factory, create) |
| |
| def _pre_message_hook(self, f): |
| """Called before writing each message to file f.""" |
| f.write(b'\001\001\001\001' + linesep) |
| |
| def _post_message_hook(self, f): |
| """Called after writing each message to file f.""" |
| f.write(linesep + b'\001\001\001\001' + linesep) |
| |
| def _generate_toc(self): |
| """Generate key-to-(start, stop) table of contents.""" |
| starts, stops = [], [] |
| self._file.seek(0) |
| next_pos = 0 |
| while True: |
| line_pos = next_pos |
| line = self._file.readline() |
| next_pos = self._file.tell() |
| if line.startswith(b'\001\001\001\001' + linesep): |
| starts.append(next_pos) |
| while True: |
| line_pos = next_pos |
| line = self._file.readline() |
| next_pos = self._file.tell() |
| if line == b'\001\001\001\001' + linesep: |
| stops.append(line_pos - len(linesep)) |
| break |
| elif not line: |
| stops.append(line_pos) |
| break |
| elif not line: |
| break |
| self._toc = dict(enumerate(zip(starts, stops))) |
| self._next_key = len(self._toc) |
| self._file.seek(0, 2) |
| self._file_length = self._file.tell() |
| |
| |
| class MH(Mailbox): |
| """An MH mailbox.""" |
| |
| def __init__(self, path, factory=None, create=True): |
| """Initialize an MH instance.""" |
| Mailbox.__init__(self, path, factory, create) |
| if not os.path.exists(self._path): |
| if create: |
| os.mkdir(self._path, 0o700) |
| os.close(os.open(os.path.join(self._path, '.mh_sequences'), |
| os.O_CREAT | os.O_EXCL | os.O_WRONLY, 0o600)) |
| else: |
| raise NoSuchMailboxError(self._path) |
| self._locked = False |
| |
| def add(self, message): |
| """Add message and return assigned key.""" |
| keys = self.keys() |
| if len(keys) == 0: |
| new_key = 1 |
| else: |
| new_key = max(keys) + 1 |
| new_path = os.path.join(self._path, str(new_key)) |
| f = _create_carefully(new_path) |
| closed = False |
| try: |
| if self._locked: |
| _lock_file(f) |
| try: |
| try: |
| self._dump_message(message, f) |
| except BaseException: |
| # Unlock and close so it can be deleted on Windows |
| if self._locked: |
| _unlock_file(f) |
| _sync_close(f) |
| closed = True |
| os.remove(new_path) |
| raise |
| if isinstance(message, MHMessage): |
| self._dump_sequences(message, new_key) |
| finally: |
| if self._locked: |
| _unlock_file(f) |
| finally: |
| if not closed: |
| _sync_close(f) |
| return new_key |
| |
| def remove(self, key): |
| """Remove the keyed message; raise KeyError if it doesn't exist.""" |
| path = os.path.join(self._path, str(key)) |
| try: |
| f = open(path, 'rb+') |
| except IOError as e: |
| if e.errno == errno.ENOENT: |
| raise KeyError('No message with key: %s' % key) |
| else: |
| raise |
| else: |
| f.close() |
| os.remove(path) |
| |
| def __setitem__(self, key, message): |
| """Replace the keyed message; raise KeyError if it doesn't exist.""" |
| path = os.path.join(self._path, str(key)) |
| try: |
| f = open(path, 'rb+') |
| except IOError as e: |
| if e.errno == errno.ENOENT: |
| raise KeyError('No message with key: %s' % key) |
| else: |
| raise |
| try: |
| if self._locked: |
| _lock_file(f) |
| try: |
| os.close(os.open(path, os.O_WRONLY | os.O_TRUNC)) |
| self._dump_message(message, f) |
| if isinstance(message, MHMessage): |
| self._dump_sequences(message, key) |
| finally: |
| if self._locked: |
| _unlock_file(f) |
| finally: |
| _sync_close(f) |
| |
| def get_message(self, key): |
| """Return a Message representation or raise a KeyError.""" |
| try: |
| if self._locked: |
| f = open(os.path.join(self._path, str(key)), 'rb+') |
| else: |
| f = open(os.path.join(self._path, str(key)), 'rb') |
| except IOError as e: |
| if e.errno == errno.ENOENT: |
| raise KeyError('No message with key: %s' % key) |
| else: |
| raise |
| try: |
| if self._locked: |
| _lock_file(f) |
| try: |
| msg = MHMessage(f) |
| finally: |
| if self._locked: |
| _unlock_file(f) |
| finally: |
| f.close() |
| for name, key_list in self.get_sequences().items(): |
| if key in key_list: |
| msg.add_sequence(name) |
| return msg |
| |
| def get_bytes(self, key): |
| """Return a bytes representation or raise a KeyError.""" |
| try: |
| if self._locked: |
| f = open(os.path.join(self._path, str(key)), 'rb+') |
| else: |
| f = open(os.path.join(self._path, str(key)), 'rb') |
| except IOError as e: |
| if e.errno == errno.ENOENT: |
| raise KeyError('No message with key: %s' % key) |
| else: |
| raise |
| try: |
| if self._locked: |
| _lock_file(f) |
| try: |
| return f.read().replace(linesep, b'\n') |
| finally: |
| if self._locked: |
| _unlock_file(f) |
| finally: |
| f.close() |
| |
| def get_file(self, key): |
| """Return a file-like representation or raise a KeyError.""" |
| try: |
| f = open(os.path.join(self._path, str(key)), 'rb') |
| except IOError as e: |
| if e.errno == errno.ENOENT: |
| raise KeyError('No message with key: %s' % key) |
| else: |
| raise |
| return _ProxyFile(f) |
| |
| def iterkeys(self): |
| """Return an iterator over keys.""" |
| return iter(sorted(int(entry) for entry in os.listdir(self._path) |
| if entry.isdigit())) |
| |
| def __contains__(self, key): |
| """Return True if the keyed message exists, False otherwise.""" |
| return os.path.exists(os.path.join(self._path, str(key))) |
| |
| def __len__(self): |
| """Return a count of messages in the mailbox.""" |
| return len(list(self.keys())) |
| |
| def lock(self): |
| """Lock the mailbox.""" |
| if not self._locked: |
| self._file = open(os.path.join(self._path, '.mh_sequences'), 'rb+') |
| _lock_file(self._file) |
| self._locked = True |
| |
| def unlock(self): |
| """Unlock the mailbox if it is locked.""" |
| if self._locked: |
| _unlock_file(self._file) |
| _sync_close(self._file) |
| del self._file |
| self._locked = False |
| |
| def flush(self): |
| """Write any pending changes to the disk.""" |
| return |
| |
| def close(self): |
| """Flush and close the mailbox.""" |
| if self._locked: |
| self.unlock() |
| |
| def list_folders(self): |
| """Return a list of folder names.""" |
| result = [] |
| for entry in os.listdir(self._path): |
| if os.path.isdir(os.path.join(self._path, entry)): |
| result.append(entry) |
| return result |
| |
| def get_folder(self, folder): |
| """Return an MH instance for the named folder.""" |
| return MH(os.path.join(self._path, folder), |
| factory=self._factory, create=False) |
| |
| def add_folder(self, folder): |
| """Create a folder and return an MH instance representing it.""" |
| return MH(os.path.join(self._path, folder), |
| factory=self._factory) |
| |
| def remove_folder(self, folder): |
| """Delete the named folder, which must be empty.""" |
| path = os.path.join(self._path, folder) |
| entries = os.listdir(path) |
| if entries == ['.mh_sequences']: |
| os.remove(os.path.join(path, '.mh_sequences')) |
| elif entries == []: |
| pass |
| else: |
| raise NotEmptyError('Folder not empty: %s' % self._path) |
| os.rmdir(path) |
| |
| def get_sequences(self): |
| """Return a name-to-key-list dictionary to define each sequence.""" |
| results = {} |
| f = open(os.path.join(self._path, '.mh_sequences'), 'r') |
| try: |
| all_keys = set(self.keys()) |
| for line in f: |
| try: |
| name, contents = line.split(':') |
| keys = set() |
| for spec in contents.split(): |
| if spec.isdigit(): |
| keys.add(int(spec)) |
| else: |
| start, stop = (int(x) for x in spec.split('-')) |
| keys.update(range(start, stop + 1)) |
| results[name] = [key for key in sorted(keys) \ |
| if key in all_keys] |
| if len(results[name]) == 0: |
| del results[name] |
| except ValueError: |
| raise FormatError('Invalid sequence specification: %s' % |
| line.rstrip()) |
| finally: |
| f.close() |
| return results |
| |
| def set_sequences(self, sequences): |
| """Set sequences using the given name-to-key-list dictionary.""" |
| f = open(os.path.join(self._path, '.mh_sequences'), 'r+') |
| try: |
| os.close(os.open(f.name, os.O_WRONLY | os.O_TRUNC)) |
| for name, keys in sequences.items(): |
| if len(keys) == 0: |
| continue |
| f.write(name + ':') |
| prev = None |
| completing = False |
| for key in sorted(set(keys)): |
| if key - 1 == prev: |
| if not completing: |
| completing = True |
| f.write('-') |
| elif completing: |
| completing = False |
| f.write('%s %s' % (prev, key)) |
| else: |
| f.write(' %s' % key) |
| prev = key |
| if completing: |
| f.write(str(prev) + '\n') |
| else: |
| f.write('\n') |
| finally: |
| _sync_close(f) |
| |
| def pack(self): |
| """Re-name messages to eliminate numbering gaps. Invalidates keys.""" |
| sequences = self.get_sequences() |
| prev = 0 |
| changes = [] |
| for key in self.keys(): |
| if key - 1 != prev: |
| changes.append((key, prev + 1)) |
| if hasattr(os, 'link'): |
| os.link(os.path.join(self._path, str(key)), |
| os.path.join(self._path, str(prev + 1))) |
| os.unlink(os.path.join(self._path, str(key))) |
| else: |
| os.rename(os.path.join(self._path, str(key)), |
| os.path.join(self._path, str(prev + 1))) |
| prev += 1 |
| self._next_key = prev + 1 |
| if len(changes) == 0: |
| return |
| for name, key_list in sequences.items(): |
| for old, new in changes: |
| if old in key_list: |
| key_list[key_list.index(old)] = new |
| self.set_sequences(sequences) |
| |
| def _dump_sequences(self, message, key): |
| """Inspect a new MHMessage and update sequences appropriately.""" |
| pending_sequences = message.get_sequences() |
| all_sequences = self.get_sequences() |
| for name, key_list in all_sequences.items(): |
| if name in pending_sequences: |
| key_list.append(key) |
| elif key in key_list: |
| del key_list[key_list.index(key)] |
| for sequence in pending_sequences: |
| if sequence not in all_sequences: |
| all_sequences[sequence] = [key] |
| self.set_sequences(all_sequences) |
| |
| |
| class Babyl(_singlefileMailbox): |
| """An Rmail-style Babyl mailbox.""" |
| |
| _special_labels = frozenset(('unseen', 'deleted', 'filed', 'answered', |
| 'forwarded', 'edited', 'resent')) |
| |
| def __init__(self, path, factory=None, create=True): |
| """Initialize a Babyl mailbox.""" |
| _singlefileMailbox.__init__(self, path, factory, create) |
| self._labels = {} |
| |
| def add(self, message): |
| """Add message and return assigned key.""" |
| key = _singlefileMailbox.add(self, message) |
| if isinstance(message, BabylMessage): |
| self._labels[key] = message.get_labels() |
| return key |
| |
| def remove(self, key): |
| """Remove the keyed message; raise KeyError if it doesn't exist.""" |
| _singlefileMailbox.remove(self, key) |
| if key in self._labels: |
| del self._labels[key] |
| |
| def __setitem__(self, key, message): |
| """Replace the keyed message; raise KeyError if it doesn't exist.""" |
| _singlefileMailbox.__setitem__(self, key, message) |
| if isinstance(message, BabylMessage): |
| self._labels[key] = message.get_labels() |
| |
| def get_message(self, key): |
| """Return a Message representation or raise a KeyError.""" |
| start, stop = self._lookup(key) |
| self._file.seek(start) |
| self._file.readline() # Skip b'1,' line specifying labels. |
| original_headers = io.BytesIO() |
| while True: |
| line = self._file.readline() |
| if line == b'*** EOOH ***' + linesep or not line: |
| break |
| original_headers.write(line.replace(linesep, b'\n')) |
| visible_headers = io.BytesIO() |
| while True: |
| line = self._file.readline() |
| if line == linesep or not line: |
| break |
| visible_headers.write(line.replace(linesep, b'\n')) |
| # Read up to the stop, or to the end |
| n = stop - self._file.tell() |
| assert n >= 0 |
| body = self._file.read(n) |
| body = body.replace(linesep, b'\n') |
| msg = BabylMessage(original_headers.getvalue() + body) |
| msg.set_visible(visible_headers.getvalue()) |
| if key in self._labels: |
| msg.set_labels(self._labels[key]) |
| return msg |
| |
| def get_bytes(self, key): |
| """Return a string representation or raise a KeyError.""" |
| start, stop = self._lookup(key) |
| self._file.seek(start) |
| self._file.readline() # Skip b'1,' line specifying labels. |
| original_headers = io.BytesIO() |
| while True: |
| line = self._file.readline() |
| if line == b'*** EOOH ***' + linesep or not line: |
| break |
| original_headers.write(line.replace(linesep, b'\n')) |
| while True: |
| line = self._file.readline() |
| if line == linesep or not line: |
| break |
| headers = original_headers.getvalue() |
| n = stop - self._file.tell() |
| assert n >= 0 |
| data = self._file.read(n) |
| data = data.replace(linesep, b'\n') |
| return headers + data |
| |
| def get_file(self, key): |
| """Return a file-like representation or raise a KeyError.""" |
| return io.BytesIO(self.get_bytes(key).replace(b'\n', linesep)) |
| |
| def get_labels(self): |
| """Return a list of user-defined labels in the mailbox.""" |
| self._lookup() |
| labels = set() |
| for label_list in self._labels.values(): |
| labels.update(label_list) |
| labels.difference_update(self._special_labels) |
| return list(labels) |
| |
| def _generate_toc(self): |
| """Generate key-to-(start, stop) table of contents.""" |
| starts, stops = [], [] |
| self._file.seek(0) |
| next_pos = 0 |
| label_lists = [] |
| while True: |
| line_pos = next_pos |
| line = self._file.readline() |
| next_pos = self._file.tell() |
| if line == b'\037\014' + linesep: |
| if len(stops) < len(starts): |
| stops.append(line_pos - len(linesep)) |
| starts.append(next_pos) |
| labels = [label.strip() for label |
| in self._file.readline()[1:].split(b',') |
| if label.strip()] |
| label_lists.append(labels) |
| elif line == b'\037' or line == b'\037' + linesep: |
| if len(stops) < len(starts): |
| stops.append(line_pos - len(linesep)) |
| elif not line: |
| stops.append(line_pos - len(linesep)) |
| break |
| self._toc = dict(enumerate(zip(starts, stops))) |
| self._labels = dict(enumerate(label_lists)) |
| self._next_key = len(self._toc) |
| self._file.seek(0, 2) |
| self._file_length = self._file.tell() |
| |
| def _pre_mailbox_hook(self, f): |
| """Called before writing the mailbox to file f.""" |
| babyl = b'BABYL OPTIONS:' + linesep |
| babyl += b'Version: 5' + linesep |
| labels = self.get_labels() |
| labels = (label.encode() for label in labels) |
| babyl += b'Labels:' + b','.join(labels) + linesep |
| babyl += b'\037' |
| f.write(babyl) |
| |
| def _pre_message_hook(self, f): |
| """Called before writing each message to file f.""" |
| f.write(b'\014' + linesep) |
| |
| def _post_message_hook(self, f): |
| """Called after writing each message to file f.""" |
| f.write(linesep + b'\037') |
| |
| def _install_message(self, message): |
| """Write message contents and return (start, stop).""" |
| start = self._file.tell() |
| if isinstance(message, BabylMessage): |
| special_labels = [] |
| labels = [] |
| for label in message.get_labels(): |
| if label in self._special_labels: |
| special_labels.append(label) |
| else: |
| labels.append(label) |
| self._file.write(b'1') |
| for label in special_labels: |
| self._file.write(b', ' + label.encode()) |
| self._file.write(b',,') |
| for label in labels: |
| self._file.write(b' ' + label.encode() + b',') |
| self._file.write(linesep) |
| else: |
| self._file.write(b'1,,' + linesep) |
| if isinstance(message, email.message.Message): |
| orig_buffer = io.BytesIO() |
| orig_generator = email.generator.BytesGenerator(orig_buffer, False, 0) |
| orig_generator.flatten(message) |
| orig_buffer.seek(0) |
| while True: |
| line = orig_buffer.readline() |
| self._file.write(line.replace(b'\n', linesep)) |
| if line == b'\n' or not line: |
| break |
| self._file.write(b'*** EOOH ***' + linesep) |
| if isinstance(message, BabylMessage): |
| vis_buffer = io.BytesIO() |
| vis_generator = email.generator.BytesGenerator(vis_buffer, False, 0) |
| vis_generator.flatten(message.get_visible()) |
| while True: |
| line = vis_buffer.readline() |
| self._file.write(line.replace(b'\n', linesep)) |
| if line == b'\n' or not line: |
| break |
| else: |
| orig_buffer.seek(0) |
| while True: |
| line = orig_buffer.readline() |
| self._file.write(line.replace(b'\n', linesep)) |
| if line == b'\n' or not line: |
| break |
| while True: |
| buffer = orig_buffer.read(4096) # Buffer size is arbitrary. |
| if not buffer: |
| break |
| self._file.write(buffer.replace(b'\n', linesep)) |
| elif isinstance(message, (bytes, str, io.StringIO)): |
| if isinstance(message, io.StringIO): |
| warnings.warn("Use of StringIO input is deprecated, " |
| "use BytesIO instead", DeprecationWarning, 3) |
| message = message.getvalue() |
| if isinstance(message, str): |
| message = self._string_to_bytes(message) |
| body_start = message.find(b'\n\n') + 2 |
| if body_start - 2 != -1: |
| self._file.write(message[:body_start].replace(b'\n', linesep)) |
| self._file.write(b'*** EOOH ***' + linesep) |
| self._file.write(message[:body_start].replace(b'\n', linesep)) |
| self._file.write(message[body_start:].replace(b'\n', linesep)) |
| else: |
| self._file.write(b'*** EOOH ***' + linesep + linesep) |
| self._file.write(message.replace(b'\n', linesep)) |
| elif hasattr(message, 'readline'): |
| if hasattr(message, 'buffer'): |
| warnings.warn("Use of text mode files is deprecated, " |
| "use a binary mode file instead", DeprecationWarning, 3) |
| message = message.buffer |
| original_pos = message.tell() |
| first_pass = True |
| while True: |
| line = message.readline() |
| # Universal newline support. |
| if line.endswith(b'\r\n'): |
| line = line[:-2] + b'\n' |
| elif line.endswith(b'\r'): |
| line = line[:-1] + b'\n' |
| self._file.write(line.replace(b'\n', linesep)) |
| if line == b'\n' or not line: |
| self._file.write(b'*** EOOH ***' + linesep) |
| if first_pass: |
| first_pass = False |
| message.seek(original_pos) |
| else: |
| break |
| while True: |
| buffer = message.read(4096) # Buffer size is arbitrary. |
| if not buffer: |
| break |
| self._file.write(buffer.replace(b'\n', linesep)) |
| else: |
| raise TypeError('Invalid message type: %s' % type(message)) |
| stop = self._file.tell() |
| return (start, stop) |
| |
| |
| class Message(email.message.Message): |
| """Message with mailbox-format-specific properties.""" |
| |
| def __init__(self, message=None): |
| """Initialize a Message instance.""" |
| if isinstance(message, email.message.Message): |
| self._become_message(copy.deepcopy(message)) |
| if isinstance(message, Message): |
| message._explain_to(self) |
| elif isinstance(message, bytes): |
| self._become_message(email.message_from_bytes(message)) |
| elif isinstance(message, str): |
| self._become_message(email.message_from_string(message)) |
| elif isinstance(message, io.TextIOWrapper): |
| self._become_message(email.message_from_file(message)) |
| elif hasattr(message, "read"): |
| self._become_message(email.message_from_binary_file(message)) |
| elif message is None: |
| email.message.Message.__init__(self) |
| else: |
| raise TypeError('Invalid message type: %s' % type(message)) |
| |
| def _become_message(self, message): |
| """Assume the non-format-specific state of message.""" |
| for name in ('_headers', '_unixfrom', '_payload', '_charset', |
| 'preamble', 'epilogue', 'defects', '_default_type'): |
| self.__dict__[name] = message.__dict__[name] |
| |
| def _explain_to(self, message): |
| """Copy format-specific state to message insofar as possible.""" |
| if isinstance(message, Message): |
| return # There's nothing format-specific to explain. |
| else: |
| raise TypeError('Cannot convert to specified type') |
| |
| |
| class MaildirMessage(Message): |
| """Message with Maildir-specific properties.""" |
| |
| def __init__(self, message=None): |
| """Initialize a MaildirMessage instance.""" |
| self._subdir = 'new' |
| self._info = '' |
| self._date = time.time() |
| Message.__init__(self, message) |
| |
| def get_subdir(self): |
| """Return 'new' or 'cur'.""" |
| return self._subdir |
| |
| def set_subdir(self, subdir): |
| """Set subdir to 'new' or 'cur'.""" |
| if subdir == 'new' or subdir == 'cur': |
| self._subdir = subdir |
| else: |
| raise ValueError("subdir must be 'new' or 'cur': %s" % subdir) |
| |
| def get_flags(self): |
| """Return as a string the flags that are set.""" |
| if self._info.startswith('2,'): |
| return self._info[2:] |
| else: |
| return '' |
| |
| def set_flags(self, flags): |
| """Set the given flags and unset all others.""" |
| self._info = '2,' + ''.join(sorted(flags)) |
| |
| def add_flag(self, flag): |
| """Set the given flag(s) without changing others.""" |
| self.set_flags(''.join(set(self.get_flags()) | set(flag))) |
| |
| def remove_flag(self, flag): |
| """Unset the given string flag(s) without changing others.""" |
| if self.get_flags(): |
| self.set_flags(''.join(set(self.get_flags()) - set(flag))) |
| |
| def get_date(self): |
| """Return delivery date of message, in seconds since the epoch.""" |
| return self._date |
| |
| def set_date(self, date): |
| """Set delivery date of message, in seconds since the epoch.""" |
| try: |
| self._date = float(date) |
| except ValueError: |
| raise TypeError("can't convert to float: %s" % date) |
| |
| def get_info(self): |
| """Get the message's "info" as a string.""" |
| return self._info |
| |
| def set_info(self, info): |
| """Set the message's "info" string.""" |
| if isinstance(info, str): |
| self._info = info |
| else: |
| raise TypeError('info must be a string: %s' % type(info)) |
| |
| def _explain_to(self, message): |
| """Copy Maildir-specific state to message insofar as possible.""" |
| if isinstance(message, MaildirMessage): |
| message.set_flags(self.get_flags()) |
| message.set_subdir(self.get_subdir()) |
| message.set_date(self.get_date()) |
| elif isinstance(message, _mboxMMDFMessage): |
| flags = set(self.get_flags()) |
| if 'S' in flags: |
| message.add_flag('R') |
| if self.get_subdir() == 'cur': |
| message.add_flag('O') |
| if 'T' in flags: |
| message.add_flag('D') |
| if 'F' in flags: |
| message.add_flag('F') |
| if 'R' in flags: |
| message.add_flag('A') |
| message.set_from('MAILER-DAEMON', time.gmtime(self.get_date())) |
| elif isinstance(message, MHMessage): |
| flags = set(self.get_flags()) |
| if 'S' not in flags: |
| message.add_sequence('unseen') |
| if 'R' in flags: |
| message.add_sequence('replied') |
| if 'F' in flags: |
| message.add_sequence('flagged') |
| elif isinstance(message, BabylMessage): |
| flags = set(self.get_flags()) |
| if 'S' not in flags: |
| message.add_label('unseen') |
| if 'T' in flags: |
| message.add_label('deleted') |
| if 'R' in flags: |
| message.add_label('answered') |
| if 'P' in flags: |
| message.add_label('forwarded') |
| elif isinstance(message, Message): |
| pass |
| else: |
| raise TypeError('Cannot convert to specified type: %s' % |
| type(message)) |
| |
| |
| class _mboxMMDFMessage(Message): |
| """Message with mbox- or MMDF-specific properties.""" |
| |
| def __init__(self, message=None): |
| """Initialize an mboxMMDFMessage instance.""" |
| self.set_from('MAILER-DAEMON', True) |
| if isinstance(message, email.message.Message): |
| unixfrom = message.get_unixfrom() |
| if unixfrom is not None and unixfrom.startswith('From '): |
| self.set_from(unixfrom[5:]) |
| Message.__init__(self, message) |
| |
| def get_from(self): |
| """Return contents of "From " line.""" |
| return self._from |
| |
| def set_from(self, from_, time_=None): |
| """Set "From " line, formatting and appending time_ if specified.""" |
| if time_ is not None: |
| if time_ is True: |
| time_ = time.gmtime() |
| from_ += ' ' + time.asctime(time_) |
| self._from = from_ |
| |
| def get_flags(self): |
| """Return as a string the flags that are set.""" |
| return self.get('Status', '') + self.get('X-Status', '') |
| |
| def set_flags(self, flags): |
| """Set the given flags and unset all others.""" |
| flags = set(flags) |
| status_flags, xstatus_flags = '', '' |
| for flag in ('R', 'O'): |
| if flag in flags: |
| status_flags += flag |
| flags.remove(flag) |
| for flag in ('D', 'F', 'A'): |
| if flag in flags: |
| xstatus_flags += flag |
| flags.remove(flag) |
| xstatus_flags += ''.join(sorted(flags)) |
| try: |
| self.replace_header('Status', status_flags) |
| except KeyError: |
| self.add_header('Status', status_flags) |
| try: |
| self.replace_header('X-Status', xstatus_flags) |
| except KeyError: |
| self.add_header('X-Status', xstatus_flags) |
| |
| def add_flag(self, flag): |
| """Set the given flag(s) without changing others.""" |
| self.set_flags(''.join(set(self.get_flags()) | set(flag))) |
| |
| def remove_flag(self, flag): |
| """Unset the given string flag(s) without changing others.""" |
| if 'Status' in self or 'X-Status' in self: |
| self.set_flags(''.join(set(self.get_flags()) - set(flag))) |
| |
| def _explain_to(self, message): |
| """Copy mbox- or MMDF-specific state to message insofar as possible.""" |
| if isinstance(message, MaildirMessage): |
| flags = set(self.get_flags()) |
| if 'O' in flags: |
| message.set_subdir('cur') |
| if 'F' in flags: |
| message.add_flag('F') |
| if 'A' in flags: |
| message.add_flag('R') |
| if 'R' in flags: |
| message.add_flag('S') |
| if 'D' in flags: |
| message.add_flag('T') |
| del message['status'] |
| del message['x-status'] |
| maybe_date = ' '.join(self.get_from().split()[-5:]) |
| try: |
| message.set_date(calendar.timegm(time.strptime(maybe_date, |
| '%a %b %d %H:%M:%S %Y'))) |
| except (ValueError, OverflowError): |
| pass |
| elif isinstance(message, _mboxMMDFMessage): |
| message.set_flags(self.get_flags()) |
| message.set_from(self.get_from()) |
| elif isinstance(message, MHMessage): |
| flags = set(self.get_flags()) |
| if 'R' not in flags: |
| message.add_sequence('unseen') |
| if 'A' in flags: |
| message.add_sequence('replied') |
| if 'F' in flags: |
| message.add_sequence('flagged') |
| del message['status'] |
| del message['x-status'] |
| elif isinstance(message, BabylMessage): |
| flags = set(self.get_flags()) |
| if 'R' not in flags: |
| message.add_label('unseen') |
| if 'D' in flags: |
| message.add_label('deleted') |
| if 'A' in flags: |
| message.add_label('answered') |
| del message['status'] |
| del message['x-status'] |
| elif isinstance(message, Message): |
| pass |
| else: |
| raise TypeError('Cannot convert to specified type: %s' % |
| type(message)) |
| |
| |
| class mboxMessage(_mboxMMDFMessage): |
| """Message with mbox-specific properties.""" |
| |
| |
| class MHMessage(Message): |
| """Message with MH-specific properties.""" |
| |
| def __init__(self, message=None): |
| """Initialize an MHMessage instance.""" |
| self._sequences = [] |
| Message.__init__(self, message) |
| |
| def get_sequences(self): |
| """Return a list of sequences that include the message.""" |
| return self._sequences[:] |
| |
| def set_sequences(self, sequences): |
| """Set the list of sequences that include the message.""" |
| self._sequences = list(sequences) |
| |
| def add_sequence(self, sequence): |
| """Add sequence to list of sequences including the message.""" |
| if isinstance(sequence, str): |
| if not sequence in self._sequences: |
| self._sequences.append(sequence) |
| else: |
| raise TypeError('sequence type must be str: %s' % type(sequence)) |
| |
| def remove_sequence(self, sequence): |
| """Remove sequence from the list of sequences including the message.""" |
| try: |
| self._sequences.remove(sequence) |
| except ValueError: |
| pass |
| |
| def _explain_to(self, message): |
| """Copy MH-specific state to message insofar as possible.""" |
| if isinstance(message, MaildirMessage): |
| sequences = set(self.get_sequences()) |
| if 'unseen' in sequences: |
| message.set_subdir('cur') |
| else: |
| message.set_subdir('cur') |
| message.add_flag('S') |
| if 'flagged' in sequences: |
| message.add_flag('F') |
| if 'replied' in sequences: |
| message.add_flag('R') |
| elif isinstance(message, _mboxMMDFMessage): |
| sequences = set(self.get_sequences()) |
| if 'unseen' not in sequences: |
| message.add_flag('RO') |
| else: |
| message.add_flag('O') |
| if 'flagged' in sequences: |
| message.add_flag('F') |
| if 'replied' in sequences: |
| message.add_flag('A') |
| elif isinstance(message, MHMessage): |
| for sequence in self.get_sequences(): |
| message.add_sequence(sequence) |
| elif isinstance(message, BabylMessage): |
| sequences = set(self.get_sequences()) |
| if 'unseen' in sequences: |
| message.add_label('unseen') |
| if 'replied' in sequences: |
| message.add_label('answered') |
| elif isinstance(message, Message): |
| pass |
| else: |
| raise TypeError('Cannot convert to specified type: %s' % |
| type(message)) |
| |
| |
| class BabylMessage(Message): |
| """Message with Babyl-specific properties.""" |
| |
| def __init__(self, message=None): |
| """Initialize an BabylMessage instance.""" |
| self._labels = [] |
| self._visible = Message() |
| Message.__init__(self, message) |
| |
| def get_labels(self): |
| """Return a list of labels on the message.""" |
| return self._labels[:] |
| |
| def set_labels(self, labels): |
| """Set the list of labels on the message.""" |
| self._labels = list(labels) |
| |
| def add_label(self, label): |
| """Add label to list of labels on the message.""" |
| if isinstance(label, str): |
| if label not in self._labels: |
| self._labels.append(label) |
| else: |
| raise TypeError('label must be a string: %s' % type(label)) |
| |
| def remove_label(self, label): |
| """Remove label from the list of labels on the message.""" |
| try: |
| self._labels.remove(label) |
| except ValueError: |
| pass |
| |
| def get_visible(self): |
| """Return a Message representation of visible headers.""" |
| return Message(self._visible) |
| |
| def set_visible(self, visible): |
| """Set the Message representation of visible headers.""" |
| self._visible = Message(visible) |
| |
| def update_visible(self): |
| """Update and/or sensibly generate a set of visible headers.""" |
| for header in self._visible.keys(): |
| if header in self: |
| self._visible.replace_header(header, self[header]) |
| else: |
| del self._visible[header] |
| for header in ('Date', 'From', 'Reply-To', 'To', 'CC', 'Subject'): |
| if header in self and header not in self._visible: |
| self._visible[header] = self[header] |
| |
| def _explain_to(self, message): |
| """Copy Babyl-specific state to message insofar as possible.""" |
| if isinstance(message, MaildirMessage): |
| labels = set(self.get_labels()) |
| if 'unseen' in labels: |
| message.set_subdir('cur') |
| else: |
| message.set_subdir('cur') |
| message.add_flag('S') |
| if 'forwarded' in labels or 'resent' in labels: |
| message.add_flag('P') |
| if 'answered' in labels: |
| message.add_flag('R') |
| if 'deleted' in labels: |
| message.add_flag('T') |
| elif isinstance(message, _mboxMMDFMessage): |
| labels = set(self.get_labels()) |
| if 'unseen' not in labels: |
| message.add_flag('RO') |
| else: |
| message.add_flag('O') |
| if 'deleted' in labels: |
| message.add_flag('D') |
| if 'answered' in labels: |
| message.add_flag('A') |
| elif isinstance(message, MHMessage): |
| labels = set(self.get_labels()) |
| if 'unseen' in labels: |
| message.add_sequence('unseen') |
| if 'answered' in labels: |
| message.add_sequence('replied') |
| elif isinstance(message, BabylMessage): |
| message.set_visible(self.get_visible()) |
| for label in self.get_labels(): |
| message.add_label(label) |
| elif isinstance(message, Message): |
| pass |
| else: |
| raise TypeError('Cannot convert to specified type: %s' % |
| type(message)) |
| |
| |
| class MMDFMessage(_mboxMMDFMessage): |
| """Message with MMDF-specific properties.""" |
| |
| |
| class _ProxyFile: |
| """A read-only wrapper of a file.""" |
| |
| def __init__(self, f, pos=None): |
| """Initialize a _ProxyFile.""" |
| self._file = f |
| if pos is None: |
| self._pos = f.tell() |
| else: |
| self._pos = pos |
| |
| def read(self, size=None): |
| """Read bytes.""" |
| return self._read(size, self._file.read) |
| |
| def read1(self, size=None): |
| """Read bytes.""" |
| return self._read(size, self._file.read1) |
| |
| def readline(self, size=None): |
| """Read a line.""" |
| return self._read(size, self._file.readline) |
| |
| def readlines(self, sizehint=None): |
| """Read multiple lines.""" |
| result = [] |
| for line in self: |
| result.append(line) |
| if sizehint is not None: |
| sizehint -= len(line) |
| if sizehint <= 0: |
| break |
| return result |
| |
| def __iter__(self): |
| """Iterate over lines.""" |
| while True: |
| line = self.readline() |
| if not line: |
| raise StopIteration |
| yield line |
| |
| def tell(self): |
| """Return the position.""" |
| return self._pos |
| |
| def seek(self, offset, whence=0): |
| """Change position.""" |
| if whence == 1: |
| self._file.seek(self._pos) |
| self._file.seek(offset, whence) |
| self._pos = self._file.tell() |
| |
| def close(self): |
| """Close the file.""" |
| if hasattr(self._file, 'close'): |
| self._file.close() |
| del self._file |
| |
| def _read(self, size, read_method): |
| """Read size bytes using read_method.""" |
| if size is None: |
| size = -1 |
| self._file.seek(self._pos) |
| result = read_method(size) |
| self._pos = self._file.tell() |
| return result |
| |
| def __enter__(self): |
| """Context manager protocol support.""" |
| return self |
| |
| def __exit__(self, *exc): |
| self.close() |
| |
| def readable(self): |
| return self._file.readable() |
| |
| def writable(self): |
| return self._file.writable() |
| |
| def seekable(self): |
| return self._file.seekable() |
| |
| def flush(self): |
| return self._file.flush() |
| |
| @property |
| def closed(self): |
| return self._file.closed |
| |
| |
| class _PartialFile(_ProxyFile): |
| """A read-only wrapper of part of a file.""" |
| |
| def __init__(self, f, start=None, stop=None): |
| """Initialize a _PartialFile.""" |
| _ProxyFile.__init__(self, f, start) |
| self._start = start |
| self._stop = stop |
| |
| def tell(self): |
| """Return the position with respect to start.""" |
| return _ProxyFile.tell(self) - self._start |
| |
| def seek(self, offset, whence=0): |
| """Change position, possibly with respect to start or stop.""" |
| if whence == 0: |
| self._pos = self._start |
| whence = 1 |
| elif whence == 2: |
| self._pos = self._stop |
| whence = 1 |
| _ProxyFile.seek(self, offset, whence) |
| |
| def _read(self, size, read_method): |
| """Read size bytes using read_method, honoring start and stop.""" |
| remaining = self._stop - self._pos |
| if remaining <= 0: |
| return b'' |
| if size is None or size < 0 or size > remaining: |
| size = remaining |
| return _ProxyFile._read(self, size, read_method) |
| |
| def close(self): |
| # do *not* close the underlying file object for partial files, |
| # since it's global to the mailbox object |
| del self._file |
| |
| |
| def _lock_file(f, dotlock=True): |
| """Lock file f using lockf and dot locking.""" |
| dotlock_done = False |
| try: |
| if fcntl: |
| try: |
| fcntl.lockf(f, fcntl.LOCK_EX | fcntl.LOCK_NB) |
| except IOError as e: |
| if e.errno in (errno.EAGAIN, errno.EACCES): |
| raise ExternalClashError('lockf: lock unavailable: %s' % |
| f.name) |
| else: |
| raise |
| if dotlock: |
| try: |
| pre_lock = _create_temporary(f.name + '.lock') |
| pre_lock.close() |
| except IOError as e: |
| if e.errno == errno.EACCES: |
| return # Without write access, just skip dotlocking. |
| else: |
| raise |
| try: |
| if hasattr(os, 'link'): |
| os.link(pre_lock.name, f.name + '.lock') |
| dotlock_done = True |
| os.unlink(pre_lock.name) |
| else: |
| os.rename(pre_lock.name, f.name + '.lock') |
| dotlock_done = True |
| except OSError as e: |
| if e.errno == errno.EEXIST or \ |
| (os.name == 'os2' and e.errno == errno.EACCES): |
| os.remove(pre_lock.name) |
| raise ExternalClashError('dot lock unavailable: %s' % |
| f.name) |
| else: |
| raise |
| except: |
| if fcntl: |
| fcntl.lockf(f, fcntl.LOCK_UN) |
| if dotlock_done: |
| os.remove(f.name + '.lock') |
| raise |
| |
| def _unlock_file(f): |
| """Unlock file f using lockf and dot locking.""" |
| if fcntl: |
| fcntl.lockf(f, fcntl.LOCK_UN) |
| if os.path.exists(f.name + '.lock'): |
| os.remove(f.name + '.lock') |
| |
| def _create_carefully(path): |
| """Create a file if it doesn't exist and open for reading and writing.""" |
| fd = os.open(path, os.O_CREAT | os.O_EXCL | os.O_RDWR, 0o666) |
| try: |
| return open(path, 'rb+') |
| finally: |
| os.close(fd) |
| |
| def _create_temporary(path): |
| """Create a temp file based on path and open for reading and writing.""" |
| return _create_carefully('%s.%s.%s.%s' % (path, int(time.time()), |
| socket.gethostname(), |
| os.getpid())) |
| |
| def _sync_flush(f): |
| """Ensure changes to file f are physically on disk.""" |
| f.flush() |
| if hasattr(os, 'fsync'): |
| os.fsync(f.fileno()) |
| |
| def _sync_close(f): |
| """Close file f, ensuring all changes are physically on disk.""" |
| _sync_flush(f) |
| f.close() |
| |
| |
| class Error(Exception): |
| """Raised for module-specific errors.""" |
| |
| class NoSuchMailboxError(Error): |
| """The specified mailbox does not exist and won't be created.""" |
| |
| class NotEmptyError(Error): |
| """The specified mailbox is not empty and deletion was requested.""" |
| |
| class ExternalClashError(Error): |
| """Another process caused an action to fail.""" |
| |
| class FormatError(Error): |
| """A file appears to have an invalid format.""" |