NAME
Mail::Box::IMAP4 - handle IMAP4 folders as client
INHERITANCE
Mail::Box::IMAP4
is a Mail::Box::Net
is a Mail::Box
is a Mail::Reporter
SYNOPSIS
use Mail::Box::IMAP4;
my $folder = new Mail::Box::IMAP4 folder => $ENV{MAIL}, ...;
DESCRIPTION
Maintain a folder which has its messages stored on a remote server. The communication between the client application and the server is implemented using the IMAP4 protocol. See also Mail::Server::IMAP4.
This class uses Mail::Transport::IMAP4 to hide the transport of information, and focusses solely on the correct handling of messages within a IMAP4 folder. More than one IMAP4 folder can be handled by one single IMAP4 connection.
OVERLOADED
METHODS
Constructors
- Mail::Box::IMAP4->new(OPTIONS)
-
The
new
can have many OPTIONS. Not only the ones listed here below, but also all the OPTIONS for Mail::Transport::IMAP4::new() can be passed.The default depends on the value of new(cache_head).
Without folder name, no folder is selected. Only few methods are available now, for instance listSubFolders() to get the top-level folder names. Usually, the folder named
INBOX
will be present.-Option --Defined in --Default access Mail::Box 'r' body_delayed_type Mail::Box Mail::Message::Body::Delayed body_type Mail::Box Mail::Message::Body::Lines cache_body NO cache_head NO or DELAY cache_labels NO or DELAY coerce_options Mail::Box [] create Mail::Box <false> extract Mail::Box 10240 field_type Mail::Box undef fix_headers Mail::Box <false> folder Mail::Box / folderdir Mail::Box <not used> head_delayed_type Mail::Box Mail::Message::Head::Delayed head_type Mail::Box Mail::Box::IMAP4::Head or Mail::Message::Head::Complete join_connection true keep_dups Mail::Box <false> lock_file Mail::Box undef lock_timeout Mail::Box 1 hour lock_type Mail::Box 'NONE' lock_wait Mail::Box 10 seconds locker Mail::Box undef log Mail::Reporter 'WARNINGS' manager Mail::Box undef message_type Mail::Box Mail::Box::IMAP4::Message multipart_type Mail::Box Mail::Message::Body::Multipart password Mail::Box::Net undef remove_when_empty Mail::Box <false> save_on_exit Mail::Box <true> server_name Mail::Box::Net undef server_port Mail::Box::Net 143 trace Mail::Reporter 'WARNINGS' transporter Mail::Transport::IMAP4 trusted Mail::Box <false> username Mail::Box::Net undef
- access => MODE
- body_delayed_type => CLASS
- body_type => CLASS|CODE
- cache_body => 'NO'|'YES'|'DELAY'
-
Body objects are immutable, but may still cached or not. In common case, the body of a message is requested via Mail::Message::body() or Mail::Message::decoded(). This returns a handle to a body object. You may decide wether that body object can be reused or not.
NO
means: retreive the data each time again,YES
will cache the body data,DELAY
will send the whole message when the folder is closed.[local cache] [write] NO no no YES yes no DELAY yes yes
- cache_head => 'NO'|'PARTIAL'|'DELAY'
-
For a read-only folder,
DELAY
is the default, otherwiseNO
is chosen. The four configuration parameter have subtile consequences. To start with a table:[local cache] [write] [default head_type] NO no no Mail::Box::IMAP4::Head PARTIAL yes no Mail::Box::IMAP4::Head DELAY yes yes Mail::Message::Head::Complete
The default
head_type
is Mail::Box::IMAP4::Head, the defaultcached_head_type
is Mail::Message::Head::Complete.Having a local cache means that a lookup for a field is first done in a local data-structure (which extends Mail::Message::Head::Partial), and only on the remote server if it was not found. This is dangerous, because your locally cached data can be out-of-sync with the server. However, it may give you a nice performance benefit.
DELAY
will always collect the whole header for you. This is required when you want to look for Resent Groups (See Mail::Message::Head::ResentGroup) or other field order dependent header access. A Mail::Message::Head::Delayed will be created first. - cache_labels => 'NO'|'WRITE'|'DELAY'
-
When labels from a message are received, these values can be kept. However, this imposes dangers where the server's internal label storage may get out of sync with your data.
With
NO
, no caching will take place (but the performance will be worse). WithWRITE
, all label access will be cached, but written to the server as well. BothNO
andWRITE
will update the labels on the served, even when the folder was opened read-only.DELAY
will not write the changed information to the server, but delay that till the moment that the folder is closed. It only works when the folder is opened read/write or write is enforced.The default is
DELAY
for folders which where opened read-only. This means that you still can force an update with close(write). For folders which are opened read-write, the default is the safeset setting, which isNO
. - coerce_options => ARRAY
- create => BOOLEAN
- extract => INTEGER | CODE | METHOD | 'LAZY'|'ALWAYS'
- field_type => CLASS
- fix_headers => BOOLEAN
- folder => FOLDERNAME
- folderdir => DIRECTORY
- head_delayed_type => CLASS
- head_type => CLASS
- join_connection => BOOLEAN
-
Within this Mail::Box::IMAP4 class is registered which transporters are already in use, i.e. which connections to the IMAP server are already in established. When this option is set, multiple folder openings on the same server will try to reuse one connection.
- keep_dups => BOOLEAN
- lock_file => FILENAME
- lock_timeout => SECONDS
- lock_type => CLASS|STRING|ARRAY
- lock_wait => SECONDS
- locker => OBJECT
- log => LEVEL
- manager => MANAGER
- message_type => CLASS
- multipart_type => CLASS
- password => STRING
- remove_when_empty => BOOLEAN
- save_on_exit => BOOLEAN
- server_name => HOSTNAME
- server_port => INTEGER
- trace => LEVEL
- transporter => OBJECT|CLASS
-
The name of the CLASS which will interface with the connection. When you implement your own extension to Mail::Transport::IMAP4, you can either specify a fully instantiated transporter OBJECT, or the name of your own CLASS. When an OBJECT is given, most other options will be ignored.
- trusted => BOOLEAN
- username => STRING
example:
my $imap = Mail::Box::IMAP4->new(username => 'myname', password => 'mypassword', server_name => 'imap.xs4all.nl'); my $url = 'imap4://user:password@imap.xs4all.nl'); my $imap = $mgr->open($url); my $client = Mail::IMAPClient->new(...); my $imap = Mail::Box::IMAP4->new(imap_client => $client);
The folder
- $obj->addMessage(MESSAGE, OPTIONS)
- $obj->addMessages(MESSAGE [, MESSAGE, ...])
- Mail::Box::IMAP4->appendMessages(OPTIONS)
- $obj->close(OPTIONS)
-
Close the folder. In the case of IMAP, more than one folder can use the same connection, therefore, closing a folder does not always close the connection to the server. Only when no folder is using the connection anymore, a logout will be invoked by Mail::Transport::IMAP4::DESTROY()
-Option --Defined in --Default force Mail::Box <false> save_deleted Mail::Box false write Mail::Box MODIFIED
- $obj->copyTo(FOLDER, OPTIONS)
- $obj->delete(OPTIONS)
- $obj->folderdir([DIRECTORY])
- $obj->name
- $obj->organization
- $obj->size
- $obj->type
- $obj->update(OPTIONS)
- $obj->url
Folder flags
The messages
- $obj->current([NUMBER|MESSAGE|MESSAGE-ID])
- $obj->find(MESSAGE-ID)
- $obj->findFirstLabeled(LABEL, [BOOLEAN, [ARRAY-OF-MSGS]])
- $obj->message(INDEX [,MESSAGE])
- $obj->messageId(MESSAGE-ID [,MESSAGE])
- $obj->messageIds
- $obj->messages(['ALL',RANGE,'ACTIVE','DELETED',LABEL,!LABEL,FILTER])
- $obj->nrMessages(OPTIONS)
- $obj->scanForMessages(MESSAGE, MESSAGE-IDS, TIMESPAN, WINDOW)
Sub-folders
- $obj->listSubFolders(OPTIONS)
-
Mail::Box::IMAP4->listSubFolders(OPTIONS)
- $obj->nameOfSubFolder(SUBNAME, [PARENTNAME])
-
Mail::Box::IMAP4->nameOfSubFolder(SUBNAME, [PARENTNAME])
- $obj->openRelatedFolder(OPTIONS)
- $obj->openSubFolder(SUBNAME, OPTIONS)
- $obj->topFolderWithMessages
-
Mail::Box::IMAP4->topFolderWithMessages
Internals
- $obj->body([BODY])
- $obj->coerce(MESSAGE, OPTIONS)
- $obj->create(FOLDER, OPTIONS)
-
Mail::Box::IMAP4->create(FOLDER, OPTIONS)
- $obj->createTransporter(CLASS, OPTIONS)
-
Create a transporter object (an instance of Mail::Transport::IMAP4), where CLASS defines the exact object type. As OPTIONS, everything which is acceptable to a transporter initiation can be used (see Mail::Transport::IMAP4::new().
-Option --Default join_connection true
- join_connection => BOOLEAN
-
See new(join_connection). When false, the connection will never be shared with other IMAP mail boxes.
- $obj->determineBodyType(MESSAGE, HEAD)
- $obj->fetch(ARRAY-OF-MESSAGES|MESSAGE-SELECTION, INFO)
-
Low-level data retreival about one or more messages via IMAP4 from the remote server. Some of this data may differ from the information which is stored in the message objects which are created by MailBox, so you should avoid the use of this method for your own purposes. The IMAP implementation provides some wrappers around this, providing the correct behavior.
An array of MESSAGES may be specified or some MESSAGE SELECTION, acceptable to Mail::Box::messages(). Examples of the latter are
'ALL'
,'DELETED'
, orspam
(messages labelled to contain spam).The INFO contains one or more attributes as defined by the IMAP protocol. You have to read the full specs of the related RFCs to see these.
- Mail::Box::IMAP4->foundIn([FOLDERNAME], OPTIONS)
- $obj->getHead(MESSAGE)
-
Read the header for the specified message from the remote server.
undef
is returned in case the message disappeared. - $obj->getHeadAndBody(MESSAGE)
-
Read all data for the specified message from the remote server. Return head and body of the mesasge as list, or an empty list if the MESSAGE disappeared from the server.
- $obj->lineSeparator([STRING|'CR'|'LF'|'CRLF'])
- $obj->locker
- $obj->read(OPTIONS)
- $obj->readMessages(OPTIONS)
- $obj->storeMessage(MESSAGE)
- $obj->toBeThreaded(MESSAGES)
- $obj->toBeUnthreaded(MESSAGES)
- $obj->transporter([OBJECT])
-
Returns the object which is the interface to the IMAP4 protocol handler. The IMAP4 handler has the current folder selected. When an OBJECT is specified, it is set to be the transporter from that moment on. The OBJECT must extend Mail::Transport::IMAP4.
- $obj->updateMessages(OPTIONS)
- $obj->write(OPTIONS)
-
The IMAP protocol usually writes the data immediately to the remote server, because that's what the protocol wants. However, some options to new() may delay that to boost performance. This method will, when the folder is being closed, write that info after all.
-Option --Defined in --Default force Mail::Box <false> save_deleted <false>
- $obj->writeMessages(OPTIONS)
-
-Option --Defined in --Default messages Mail::Box <required> transporter <required>
Other methods
Error handling
- $obj->AUTOLOAD
- $obj->addReport(OBJECT)
- $obj->defaultTrace([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK])
-
Mail::Box::IMAP4->defaultTrace([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK])
- $obj->errors
- $obj->log([LEVEL [,STRINGS]])
-
Mail::Box::IMAP4->log([LEVEL [,STRINGS]])
- $obj->logPriority(LEVEL)
-
Mail::Box::IMAP4->logPriority(LEVEL)
- $obj->logSettings
- $obj->notImplemented
- $obj->report([LEVEL])
- $obj->reportAll([LEVEL])
- $obj->trace([LEVEL])
- $obj->warnings
Cleanup
DIAGNOSTICS
- Warning: Cannot find head back for $uidl in $folder.
-
The header was read before, but now seems empty: the IMAP4 server does not produce the header lines anymore.
- Warning: Cannot read body for $uidl in $folder.
-
The header of the message was retreived from the IMAP4 server, but the body is not read, for an unknown reason.
- Error: Copying failed for one message.
-
For some reason, for instance disc full, removed by external process, or read-protection, it is impossible to copy one of the messages. Copying will proceed for the other messages.
- Error: Couldn't select IMAP4 folder $name
- Error: Destination folder $name is not writable.
-
The folder where the messages are copied to is not opened with write access (see new(access)). This has no relation with write permission to the folder which is controled by your operating system.
- Warning: Different messages with id $msgid
-
The message id is discovered more than once within the same folder, but the content of the message seems to be different. This should not be possible: each message must be unique.
- Error: Folder $name not deleted: not writable.
-
The folder must be opened with write access via new(access), otherwise removing it will be refused. So, you may have write-access according to the operating system, but that will not automatically mean that this
delete
method permits you to. The reverse remark is valid as well. - Notice: Impossible to keep deleted messages in IMAP
-
Some folder type have a 'deleted' flag which can be stored in the folder to be performed later. The folder keeps that knowledge even when the folder is rewritten. Well, IMAP4 cannot play that trick.
- Error: Invalid timespan '$timespan' specified.
-
The string does not follow the strict rules of the time span syntax which is permitted as parameter.
- Warning: Message $uidl disappeared from $folder.
-
Trying to get the specific message from the server, but it appears to be gone.
- Warning: Message $uidl disappeared from $folder.
-
Trying to get the specific message from the server, but it appears to be gone.
- Warning: Message-id '$msgid' does not contain a domain.
-
According to the RFCs, message-ids need to contain a unique random part, then an
@
, and then a domain name. This is made to avoid the creation of two messages with the same id. The warning emerges when the@
is missing from the string. - Error: No IMAP4 transporter configured
- Error: Package $package does not implement $method.
-
Fatal error: the specific package (or one of its superclasses) does not implement this method where it should. This message means that some other related classes do implement this method however the class at hand does not. Probably you should investigate this and probably inform the author of the package.
- Error: Unable to create subfolder $name of $folder.
-
The copy includes the subfolders, but for some reason it was not possible to copy one of these. Copying will proceed for all other sub-folders.
SEE ALSO
This module is part of Mail-Box distribution version 2.097, built on January 26, 2011. Website: http://perl.overmeer.net/mailbox/
LICENSE
Copyrights 2001-2011 by Mark Overmeer. For other contributors see ChangeLog.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See http://www.perl.com/perl/misc/Artistic.html