summaryrefslogtreecommitdiff
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/feed2imap/imap.rb2
-rw-r--r--lib/feed2imap/rubyimap.rb3250
2 files changed, 3251 insertions, 1 deletions
diff --git a/lib/feed2imap/imap.rb b/lib/feed2imap/imap.rb
index 4fc1302..5317eb9 100644
--- a/lib/feed2imap/imap.rb
+++ b/lib/feed2imap/imap.rb
@@ -18,7 +18,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
=end
# Imap connection handling
-require 'net/imap'
+require 'feed2imap/rubyimap'
begin
require 'openssl'
rescue
diff --git a/lib/feed2imap/rubyimap.rb b/lib/feed2imap/rubyimap.rb
new file mode 100644
index 0000000..82d5b29
--- /dev/null
+++ b/lib/feed2imap/rubyimap.rb
@@ -0,0 +1,3250 @@
+#
+# = net/imap.rb
+#
+# Copyright (C) 2000 Shugo Maeda <shugo@ruby-lang.org>
+#
+# This library is distributed under the terms of the Ruby license.
+# You can freely distribute/modify this library.
+#
+# Documentation: Shugo Maeda, with RDoc conversion and overview by William
+# Webber.
+#
+# See Net::IMAP for documentation.
+#
+
+
+require "socket"
+require "monitor"
+require "digest/md5"
+begin
+ require "openssl"
+rescue LoadError
+end
+
+module Net
+
+ #
+ # Net::IMAP implements Internet Message Access Protocol (IMAP) client
+ # functionality. The protocol is described in [IMAP].
+ #
+ # == IMAP Overview
+ #
+ # An IMAP client connects to a server, and then authenticates
+ # itself using either #authenticate() or #login(). Having
+ # authenticated itself, there is a range of commands
+ # available to it. Most work with mailboxes, which may be
+ # arranged in an hierarchical namespace, and each of which
+ # contains zero or more messages. How this is implemented on
+ # the server is implementation-dependent; on a UNIX server, it
+ # will frequently be implemented as a files in mailbox format
+ # within a hierarchy of directories.
+ #
+ # To work on the messages within a mailbox, the client must
+ # first select that mailbox, using either #select() or (for
+ # read-only access) #examine(). Once the client has successfully
+ # selected a mailbox, they enter _selected_ state, and that
+ # mailbox becomes the _current_ mailbox, on which mail-item
+ # related commands implicitly operate.
+ #
+ # Messages have two sorts of identifiers: message sequence
+ # numbers, and UIDs.
+ #
+ # Message sequence numbers number messages within a mail box
+ # from 1 up to the number of items in the mail box. If new
+ # message arrives during a session, it receives a sequence
+ # number equal to the new size of the mail box. If messages
+ # are expunged from the mailbox, remaining messages have their
+ # sequence numbers "shuffled down" to fill the gaps.
+ #
+ # UIDs, on the other hand, are permanently guaranteed not to
+ # identify another message within the same mailbox, even if
+ # the existing message is deleted. UIDs are required to
+ # be assigned in ascending (but not necessarily sequential)
+ # order within a mailbox; this means that if a non-IMAP client
+ # rearranges the order of mailitems within a mailbox, the
+ # UIDs have to be reassigned. An IMAP client cannot thus
+ # rearrange message orders.
+ #
+ # == Examples of Usage
+ #
+ # === List sender and subject of all recent messages in the default mailbox
+ #
+ # imap = Net::IMAP.new('mail.example.com')
+ # imap.authenticate('LOGIN', 'joe_user', 'joes_password')
+ # imap.examine('INBOX')
+ # imap.search(["RECENT"]).each do |message_id|
+ # envelope = imap.fetch(message_id, "ENVELOPE")[0].attr["ENVELOPE"]
+ # puts "#{envelope.from[0].name}: \t#{envelope.subject}"
+ # end
+ #
+ # === Move all messages from April 2003 from "Mail/sent-mail" to "Mail/sent-apr03"
+ #
+ # imap = Net::IMAP.new('mail.example.com')
+ # imap.authenticate('LOGIN', 'joe_user', 'joes_password')
+ # imap.select('Mail/sent-mail')
+ # if not imap.list('Mail/', 'sent-apr03')
+ # imap.create('Mail/sent-apr03')
+ # end
+ # imap.search(["BEFORE", "30-Apr-2003", "SINCE", "1-Apr-2003"]).each do |message_id|
+ # imap.copy(message_id, "Mail/sent-apr03")
+ # imap.store(message_id, "+FLAGS", [:Deleted])
+ # end
+ # imap.expunge
+ #
+ # == Thread Safety
+ #
+ # Net::IMAP supports concurrent threads. For example,
+ #
+ # imap = Net::IMAP.new("imap.foo.net", "imap2")
+ # imap.authenticate("cram-md5", "bar", "password")
+ # imap.select("inbox")
+ # fetch_thread = Thread.start { imap.fetch(1..-1, "UID") }
+ # search_result = imap.search(["BODY", "hello"])
+ # fetch_result = fetch_thread.value
+ # imap.disconnect
+ #
+ # This script invokes the FETCH command and the SEARCH command concurrently.
+ #
+ # == Errors
+ #
+ # An IMAP server can send three different types of responses to indicate
+ # failure:
+ #
+ # NO:: the attempted command could not be successfully completed. For
+ # instance, the username/password used for logging in are incorrect;
+ # the selected mailbox does not exists; etc.
+ #
+ # BAD:: the request from the client does not follow the server's
+ # understanding of the IMAP protocol. This includes attempting
+ # commands from the wrong client state; for instance, attempting
+ # to perform a SEARCH command without having SELECTed a current
+ # mailbox. It can also signal an internal server
+ # failure (such as a disk crash) has occurred.
+ #
+ # BYE:: the server is saying goodbye. This can be part of a normal
+ # logout sequence, and can be used as part of a login sequence
+ # to indicate that the server is (for some reason) unwilling
+ # to accept our connection. As a response to any other command,
+ # it indicates either that the server is shutting down, or that
+ # the server is timing out the client connection due to inactivity.
+ #
+ # These three error response are represented by the errors
+ # Net::IMAP::NoResponseError, Net::IMAP::BadResponseError, and
+ # Net::IMAP::ByeResponseError, all of which are subclasses of
+ # Net::IMAP::ResponseError. Essentially, all methods that involve
+ # sending a request to the server can generate one of these errors.
+ # Only the most pertinent instances have been documented below.
+ #
+ # Because the IMAP class uses Sockets for communication, its methods
+ # are also susceptible to the various errors that can occur when
+ # working with sockets. These are generally represented as
+ # Errno errors. For instance, any method that involves sending a
+ # request to the server and/or receiving a response from it could
+ # raise an Errno::EPIPE error if the network connection unexpectedly
+ # goes down. See the socket(7), ip(7), tcp(7), socket(2), connect(2),
+ # and associated man pages.
+ #
+ # Finally, a Net::IMAP::DataFormatError is thrown if low-level data
+ # is found to be in an incorrect format (for instance, when converting
+ # between UTF-8 and UTF-16), and Net::IMAP::ResponseParseError is
+ # thrown if a server response is non-parseable.
+ #
+ #
+ # == References
+ #
+ # [[IMAP]]
+ # M. Crispin, "INTERNET MESSAGE ACCESS PROTOCOL - VERSION 4rev1",
+ # RFC 2060, December 1996. (Note: since obsoleted by RFC 3501)
+ #
+ # [[LANGUAGE-TAGS]]
+ # Alvestrand, H., "Tags for the Identification of
+ # Languages", RFC 1766, March 1995.
+ #
+ # [[MD5]]
+ # Myers, J., and M. Rose, "The Content-MD5 Header Field", RFC
+ # 1864, October 1995.
+ #
+ # [[MIME-IMB]]
+ # Freed, N., and N. Borenstein, "MIME (Multipurpose Internet
+ # Mail Extensions) Part One: Format of Internet Message Bodies", RFC
+ # 2045, November 1996.
+ #
+ # [[RFC-822]]
+ # Crocker, D., "Standard for the Format of ARPA Internet Text
+ # Messages", STD 11, RFC 822, University of Delaware, August 1982.
+ #
+ # [[RFC-2087]]
+ # Myers, J., "IMAP4 QUOTA extension", RFC 2087, January 1997.
+ #
+ # [[RFC-2086]]
+ # Myers, J., "IMAP4 ACL extension", RFC 2086, January 1997.
+ #
+ # [[RFC-2195]]
+ # Klensin, J., Catoe, R., and Krumviede, P., "IMAP/POP AUTHorize Extension
+ # for Simple Challenge/Response", RFC 2195, September 1997.
+ #
+ # [[SORT-THREAD-EXT]]
+ # Crispin, M., "INTERNET MESSAGE ACCESS PROTOCOL - SORT and THREAD
+ # Extensions", draft-ietf-imapext-sort, May 2003.
+ #
+ # [[OSSL]]
+ # http://www.openssl.org
+ #
+ # [[RSSL]]
+ # http://savannah.gnu.org/projects/rubypki
+ #
+ # [[UTF7]]
+ # Goldsmith, D. and Davis, M., "UTF-7: A Mail-Safe Transformation Format of
+ # Unicode", RFC 2152, May 1997.
+ #
+ class IMAP
+ include MonitorMixin
+ if defined?(OpenSSL)
+ include OpenSSL
+ include SSL
+ end
+
+ # Returns an initial greeting response from the server.
+ attr_reader :greeting
+
+ # Returns recorded untagged responses. For example:
+ #
+ # imap.select("inbox")
+ # p imap.responses["EXISTS"][-1]
+ # #=> 2
+ # p imap.responses["UIDVALIDITY"][-1]
+ # #=> 968263756
+ attr_reader :responses
+
+ # Returns all response handlers.
+ attr_reader :response_handlers
+
+ # The thread to receive exceptions.
+ attr_accessor :client_thread
+
+ # Flag indicating a message has been seen
+ SEEN = :Seen
+
+ # Flag indicating a message has been answered
+ ANSWERED = :Answered
+
+ # Flag indicating a message has been flagged for special or urgent
+ # attention
+ FLAGGED = :Flagged
+
+ # Flag indicating a message has been marked for deletion. This
+ # will occur when the mailbox is closed or expunged.
+ DELETED = :Deleted
+
+ # Flag indicating a message is only a draft or work-in-progress version.
+ DRAFT = :Draft
+
+ # Flag indicating that the message is "recent", meaning that this
+ # session is the first session in which the client has been notified
+ # of this message.
+ RECENT = :Recent
+
+ # Flag indicating that a mailbox context name cannot contain
+ # children.
+ NOINFERIORS = :Noinferiors
+
+ # Flag indicating that a mailbox is not selected.
+ NOSELECT = :Noselect
+
+ # Flag indicating that a mailbox has been marked "interesting" by
+ # the server; this commonly indicates that the mailbox contains
+ # new messages.
+ MARKED = :Marked
+
+ # Flag indicating that the mailbox does not contains new messages.
+ UNMARKED = :Unmarked
+
+ # Returns the debug mode.
+ def self.debug
+ return @@debug
+ end
+
+ # Sets the debug mode.
+ def self.debug=(val)
+ return @@debug = val
+ end
+
+ # Adds an authenticator for Net::IMAP#authenticate. +auth_type+
+ # is the type of authentication this authenticator supports
+ # (for instance, "LOGIN"). The +authenticator+ is an object
+ # which defines a process() method to handle authentication with
+ # the server. See Net::IMAP::LoginAuthenticator and
+ # Net::IMAP::CramMD5Authenticator for examples.
+ #
+ # If +auth_type+ refers to an existing authenticator, it will be
+ # replaced by the new one.
+ def self.add_authenticator(auth_type, authenticator)
+ @@authenticators[auth_type] = authenticator
+ end
+
+ # Disconnects from the server.
+ def disconnect
+ @sock.shutdown unless @usessl
+ @receiver_thread.join
+ @sock.close
+ end
+
+ # Returns true if disconnected from the server.
+ def disconnected?
+ return @sock.closed?
+ end
+
+ # Sends a CAPABILITY command, and returns an array of
+ # capabilities that the server supports. Each capability
+ # is a string. See [IMAP] for a list of possible
+ # capabilities.
+ #
+ # Note that the Net::IMAP class does not modify its
+ # behaviour according to the capabilities of the server;
+ # it is up to the user of the class to ensure that
+ # a certain capability is supported by a server before
+ # using it.
+ def capability
+ synchronize do
+ send_command("CAPABILITY")
+ return @responses.delete("CAPABILITY")[-1]
+ end
+ end
+
+ # Sends a NOOP command to the server. It does nothing.
+ def noop
+ send_command("NOOP")
+ end
+
+ # Sends a LOGOUT command to inform the server that the client is
+ # done with the connection.
+ def logout
+ send_command("LOGOUT")
+ end
+
+ # Sends an AUTHENTICATE command to authenticate the client.
+ # The +auth_type+ parameter is a string that represents
+ # the authentication mechanism to be used. Currently Net::IMAP
+ # supports authentication mechanisms:
+ #
+ # LOGIN:: login using cleartext user and password.
+ # CRAM-MD5:: login with cleartext user and encrypted password
+ # (see [RFC-2195] for a full description). This
+ # mechanism requires that the server have the user's
+ # password stored in clear-text password.
+ #
+ # For both these mechanisms, there should be two +args+: username
+ # and (cleartext) password. A server may not support one or other
+ # of these mechanisms; check #capability() for a capability of
+ # the form "AUTH=LOGIN" or "AUTH=CRAM-MD5".
+ #
+ # Authentication is done using the appropriate authenticator object:
+ # see @@authenticators for more information on plugging in your own
+ # authenticator.
+ #
+ # For example:
+ #
+ # imap.authenticate('LOGIN', user, password)
+ #
+ # A Net::IMAP::NoResponseError is raised if authentication fails.
+ def authenticate(auth_type, *args)
+ auth_type = auth_type.upcase
+ unless @@authenticators.has_key?(auth_type)
+ raise ArgumentError,
+ format('unknown auth type - "%s"', auth_type)
+ end
+ authenticator = @@authenticators[auth_type].new(*args)
+ send_command("AUTHENTICATE", auth_type) do |resp|
+ if resp.instance_of?(ContinuationRequest)
+ data = authenticator.process(resp.data.text.unpack("m")[0])
+ s = [data].pack("m").gsub(/\n/, "")
+ send_string_data(s)
+ put_string(CRLF)
+ end
+ end
+ end
+
+ # Sends a LOGIN command to identify the client and carries
+ # the plaintext +password+ authenticating this +user+. Note
+ # that, unlike calling #authenticate() with an +auth_type+
+ # of "LOGIN", #login() does *not* use the login authenticator.
+ #
+ # A Net::IMAP::NoResponseError is raised if authentication fails.
+ def login(user, password)
+ send_command("LOGIN", user, password)
+ end
+
+ # Sends a SELECT command to select a +mailbox+ so that messages
+ # in the +mailbox+ can be accessed.
+ #
+ # After you have selected a mailbox, you may retrieve the
+ # number of items in that mailbox from @responses["EXISTS"][-1],
+ # and the number of recent messages from @responses["RECENT"][-1].
+ # Note that these values can change if new messages arrive
+ # during a session; see #add_response_handler() for a way of
+ # detecting this event.
+ #
+ # A Net::IMAP::NoResponseError is raised if the mailbox does not
+ # exist or is for some reason non-selectable.
+ def select(mailbox)
+ synchronize do
+ @responses.clear
+ send_command("SELECT", mailbox)
+ end
+ end
+
+ # Sends a EXAMINE command to select a +mailbox+ so that messages
+ # in the +mailbox+ can be accessed. Behaves the same as #select(),
+ # except that the selected +mailbox+ is identified as read-only.
+ #
+ # A Net::IMAP::NoResponseError is raised if the mailbox does not
+ # exist or is for some reason non-examinable.
+ def examine(mailbox)
+ synchronize do
+ @responses.clear
+ send_command("EXAMINE", mailbox)
+ end
+ end
+
+ # Sends a CREATE command to create a new +mailbox+.
+ #
+ # A Net::IMAP::NoResponseError is raised if a mailbox with that name
+ # cannot be created.
+ def create(mailbox)
+ send_command("CREATE", mailbox)
+ end
+
+ # Sends a DELETE command to remove the +mailbox+.
+ #
+ # A Net::IMAP::NoResponseError is raised if a mailbox with that name
+ # cannot be deleted, either because it does not exist or because the
+ # client does not have permission to delete it.
+ def delete(mailbox)
+ send_command("DELETE", mailbox)
+ end
+
+ # Sends a RENAME command to change the name of the +mailbox+ to
+ # +newname+.
+ #
+ # A Net::IMAP::NoResponseError is raised if a mailbox with the
+ # name +mailbox+ cannot be renamed to +newname+ for whatever
+ # reason; for instance, because +mailbox+ does not exist, or
+ # because there is already a mailbox with the name +newname+.
+ def rename(mailbox, newname)
+ send_command("RENAME", mailbox, newname)
+ end
+
+ # Sends a SUBSCRIBE command to add the specified +mailbox+ name to
+ # the server's set of "active" or "subscribed" mailboxes as returned
+ # by #lsub().
+ #
+ # A Net::IMAP::NoResponseError is raised if +mailbox+ cannot be
+ # subscribed to, for instance because it does not exist.
+ def subscribe(mailbox)
+ send_command("SUBSCRIBE", mailbox)
+ end
+
+ # Sends a UNSUBSCRIBE command to remove the specified +mailbox+ name
+ # from the server's set of "active" or "subscribed" mailboxes.
+ #
+ # A Net::IMAP::NoResponseError is raised if +mailbox+ cannot be
+ # unsubscribed from, for instance because the client is not currently
+ # subscribed to it.
+ def unsubscribe(mailbox)
+ send_command("UNSUBSCRIBE", mailbox)
+ end
+
+ # Sends a LIST command, and returns a subset of names from
+ # the complete set of all names available to the client.
+ # +refname+ provides a context (for instance, a base directory
+ # in a directory-based mailbox hierarchy). +mailbox+ specifies
+ # a mailbox or (via wildcards) mailboxes under that context.
+ # Two wildcards may be used in +mailbox+: '*', which matches
+ # all characters *including* the hierarchy delimiter (for instance,
+ # '/' on a UNIX-hosted directory-based mailbox hierarchy); and '%',
+ # which matches all characters *except* the hierarchy delimiter.
+ #
+ # If +refname+ is empty, +mailbox+ is used directly to determine
+ # which mailboxes to match. If +mailbox+ is empty, the root
+ # name of +refname+ and the hierarchy delimiter are returned.
+ #
+ # The return value is an array of +Net::IMAP::MailboxList+. For example:
+ #
+ # imap.create("foo/bar")
+ # imap.create("foo/baz")
+ # p imap.list("", "foo/%")
+ # #=> [#<Net::IMAP::MailboxList attr=[:Noselect], delim="/", name="foo/">, \\
+ # #<Net::IMAP::MailboxList attr=[:Noinferiors, :Marked], delim="/", name="foo/bar">, \\
+ # #<Net::IMAP::MailboxList attr=[:Noinferiors], delim="/", name="foo/baz">]
+ def list(refname, mailbox)
+ synchronize do
+ send_command("LIST", refname, mailbox)
+ return @responses.delete("LIST")
+ end
+ end
+
+ # Sends the GETQUOTAROOT command along with specified +mailbox+.
+ # This command is generally available to both admin and user.
+ # If mailbox exists, returns an array containing objects of
+ # Net::IMAP::MailboxQuotaRoot and Net::IMAP::MailboxQuota.
+ def getquotaroot(mailbox)
+ synchronize do
+ send_command("GETQUOTAROOT", mailbox)
+ result = []
+ result.concat(@responses.delete("QUOTAROOT"))
+ result.concat(@responses.delete("QUOTA"))
+ return result
+ end
+ end
+
+ # Sends the GETQUOTA command along with specified +mailbox+.
+ # If this mailbox exists, then an array containing a
+ # Net::IMAP::MailboxQuota object is returned. This
+ # command generally is only available to server admin.
+ def getquota(mailbox)
+ synchronize do
+ send_command("GETQUOTA", mailbox)
+ return @responses.delete("QUOTA")
+ end
+ end
+
+ # Sends a SETQUOTA command along with the specified +mailbox+ and
+ # +quota+. If +quota+ is nil, then quota will be unset for that
+ # mailbox. Typically one needs to be logged in as server admin
+ # for this to work. The IMAP quota commands are described in
+ # [RFC-2087].
+ def setquota(mailbox, quota)
+ if quota.nil?
+ data = '()'
+ else
+ data = '(STORAGE ' + quota.to_s + ')'
+ end
+ send_command("SETQUOTA", mailbox, RawData.new(data))
+ end
+
+ # Sends the SETACL command along with +mailbox+, +user+ and the
+ # +rights+ that user is to have on that mailbox. If +rights+ is nil,
+ # then that user will be stripped of any rights to that mailbox.
+ # The IMAP ACL commands are described in [RFC-2086].
+ def setacl(mailbox, user, rights)
+ if rights.nil?
+ send_command("SETACL", mailbox, user, "")
+ else
+ send_command("SETACL", mailbox, user, rights)
+ end
+ end
+
+ # Send the GETACL command along with specified +mailbox+.
+ # If this mailbox exists, an array containing objects of
+ # Net::IMAP::MailboxACLItem will be returned.
+ def getacl(mailbox)
+ synchronize do
+ send_command("GETACL", mailbox)
+ return @responses.delete("ACL")[-1]
+ end
+ end
+
+ # Sends a LSUB command, and returns a subset of names from the set
+ # of names that the user has declared as being "active" or
+ # "subscribed". +refname+ and +mailbox+ are interpreted as
+ # for #list().
+ # The return value is an array of +Net::IMAP::MailboxList+.
+ def lsub(refname, mailbox)
+ synchronize do
+ send_command("LSUB", refname, mailbox)
+ return @responses.delete("LSUB")
+ end
+ end
+
+ # Sends a STATUS command, and returns the status of the indicated
+ # +mailbox+. +attr+ is a list of one or more attributes that
+ # we are request the status of. Supported attributes include:
+ #
+ # MESSAGES:: the number of messages in the mailbox.
+ # RECENT:: the number of recent messages in the mailbox.
+ # UNSEEN:: the number of unseen messages in the mailbox.
+ #
+ # The return value is a hash of attributes. For example:
+ #
+ # p imap.status("inbox", ["MESSAGES", "RECENT"])
+ # #=> {"RECENT"=>0, "MESSAGES"=>44}
+ #
+ # A Net::IMAP::NoResponseError is raised if status values
+ # for +mailbox+ cannot be returned, for instance because it
+ # does not exist.
+ def status(mailbox, attr)
+ synchronize do
+ send_command("STATUS", mailbox, attr)
+ return @responses.delete("STATUS")[-1].attr
+ end
+ end
+
+ # Sends a APPEND command to append the +message+ to the end of
+ # the +mailbox+. The optional +flags+ argument is an array of
+ # flags to initially passing to the new message. The optional
+ # +date_time+ argument specifies the creation time to assign to the
+ # new message; it defaults to the current time.
+ # For example:
+ #
+ # imap.append("inbox", <<EOF.gsub(/\n/, "\r\n"), [:Seen], Time.now)
+ # Subject: hello
+ # From: shugo@ruby-lang.org
+ # To: shugo@ruby-lang.org
+ #
+ # hello world
+ # EOF
+ #
+ # A Net::IMAP::NoResponseError is raised if the mailbox does
+ # not exist (it is not created automatically), or if the flags,
+ # date_time, or message arguments contain errors.
+ def append(mailbox, message, flags = nil, date_time = nil)
+ args = []
+ if flags
+ args.push(flags)
+ end
+ args.push(date_time) if date_time
+ args.push(Literal.new(message))
+ send_command("APPEND", mailbox, *args)
+ end
+
+ # Sends a CHECK command to request a checkpoint of the currently
+ # selected mailbox. This performs implementation-specific
+ # housekeeping, for instance, reconciling the mailbox's
+ # in-memory and on-disk state.
+ def check
+ send_command("CHECK")
+ end
+
+ # Sends a CLOSE command to close the currently selected mailbox.
+ # The CLOSE command permanently removes from the mailbox all
+ # messages that have the \Deleted flag set.
+ def close
+ send_command("CLOSE")
+ end
+
+ # Sends a EXPUNGE command to permanently remove from the currently
+ # selected mailbox all messages that have the \Deleted flag set.
+ def expunge
+ synchronize do
+ send_command("EXPUNGE")
+ return @responses.delete("EXPUNGE")
+ end
+ end
+
+ # Sends a SEARCH command to search the mailbox for messages that
+ # match the given searching criteria, and returns message sequence
+ # numbers. +keys+ can either be a string holding the entire
+ # search string, or a single-dimension array of search keywords and
+ # arguments. The following are some common search criteria;
+ # see [IMAP] section 6.4.4 for a full list.
+ #
+ # <message set>:: a set of message sequence numbers. ',' indicates
+ # an interval, ':' indicates a range. For instance,
+ # '2,10:12,15' means "2,10,11,12,15".
+ #
+ # BEFORE <date>:: messages with an internal date strictly before
+ # <date>. The date argument has a format similar
+ # to 8-Aug-2002.
+ #
+ # BODY <string>:: messages that contain <string> within their body.
+ #
+ # CC <string>:: messages containing <string> in their CC field.
+ #
+ # FROM <string>:: messages that contain <string> in their FROM field.
+ #
+ # NEW:: messages with the \Recent, but not the \Seen, flag set.
+ #
+ # NOT <search-key>:: negate the following search key.
+ #
+ # OR <search-key> <search-key>:: "or" two search keys together.
+ #
+ # ON <date>:: messages with an internal date exactly equal to <date>,
+ # which has a format similar to 8-Aug-2002.
+ #
+ # SINCE <date>:: messages with an internal date on or after <date>.
+ #
+ # SUBJECT <string>:: messages with <string> in their subject.
+ #
+ # TO <string>:: messages with <string> in their TO field.
+ #
+ # For example:
+ #
+ # p imap.search(["SUBJECT", "hello", "NOT", "NEW"])
+ # #=> [1, 6, 7, 8]
+ def search(keys, charset = nil)
+ return search_internal("SEARCH", keys, charset)
+ end
+
+ # As for #search(), but returns unique identifiers.
+ def uid_search(keys, charset = nil)
+ return search_internal("UID SEARCH", keys, charset)
+ end
+
+ # Sends a FETCH command to retrieve data associated with a message
+ # in the mailbox. The +set+ parameter is a number or an array of
+ # numbers or a Range object. The number is a message sequence
+ # number. +attr+ is a list of attributes to fetch; see the
+ # documentation for Net::IMAP::FetchData for a list of valid
+ # attributes.
+ # The return value is an array of Net::IMAP::FetchData. For example:
+ #
+ # p imap.fetch(6..8, "UID")
+ # #=> [#<Net::IMAP::FetchData seqno=6, attr={"UID"=>98}>, \\
+ # #<Net::IMAP::FetchData seqno=7, attr={"UID"=>99}>, \\
+ # #<Net::IMAP::FetchData seqno=8, attr={"UID"=>100}>]
+ # p imap.fetch(6, "BODY[HEADER.FIELDS (SUBJECT)]")
+ # #=> [#<Net::IMAP::FetchData seqno=6, attr={"BODY[HEADER.FIELDS (SUBJECT)]"=>"Subject: test\r\n\r\n"}>]
+ # data = imap.uid_fetch(98, ["RFC822.SIZE", "INTERNALDATE"])[0]
+ # p data.seqno
+ # #=> 6
+ # p data.attr["RFC822.SIZE"]
+ # #=> 611
+ # p data.attr["INTERNALDATE"]
+ # #=> "12-Oct-2000 22:40:59 +0900"
+ # p data.attr["UID"]
+ # #=> 98
+ def fetch(set, attr)
+ return fetch_internal("FETCH", set, attr)
+ end
+
+ # As for #fetch(), but +set+ contains unique identifiers.
+ def uid_fetch(set, attr)
+ return fetch_internal("UID FETCH", set, attr)
+ end
+
+ # Sends a STORE command to alter data associated with messages
+ # in the mailbox, in particular their flags. The +set+ parameter
+ # is a number or an array of numbers or a Range object. Each number
+ # is a message sequence number. +attr+ is the name of a data item
+ # to store: 'FLAGS' means to replace the message's flag list
+ # with the provided one; '+FLAGS' means to add the provided flags;
+ # and '-FLAGS' means to remove them. +flags+ is a list of flags.
+ #
+ # The return value is an array of Net::IMAP::FetchData. For example:
+ #
+ # p imap.store(6..8, "+FLAGS", [:Deleted])
+ # #=> [#<Net::IMAP::FetchData seqno=6, attr={"FLAGS"=>[:Seen, :Deleted]}>, \\
+ # #<Net::IMAP::FetchData seqno=7, attr={"FLAGS"=>[:Seen, :Deleted]}>, \\
+ # #<Net::IMAP::FetchData seqno=8, attr={"FLAGS"=>[:Seen, :Deleted]}>]
+ def store(set, attr, flags)
+ return store_internal("STORE", set, attr, flags)
+ end
+
+ # As for #store(), but +set+ contains unique identifiers.
+ def uid_store(set, attr, flags)
+ return store_internal("UID STORE", set, attr, flags)
+ end
+
+ # Sends a COPY command to copy the specified message(s) to the end
+ # of the specified destination +mailbox+. The +set+ parameter is
+ # a number or an array of numbers or a Range object. The number is
+ # a message sequence number.
+ def copy(set, mailbox)
+ copy_internal("COPY", set, mailbox)
+ end
+
+ # As for #copy(), but +set+ contains unique identifiers.
+ def uid_copy(set, mailbox)
+ copy_internal("UID COPY", set, mailbox)
+ end
+
+ # Sends a SORT command to sort messages in the mailbox.
+ # Returns an array of message sequence numbers. For example:
+ #
+ # p imap.sort(["FROM"], ["ALL"], "US-ASCII")
+ # #=> [1, 2, 3, 5, 6, 7, 8, 4, 9]
+ # p imap.sort(["DATE"], ["SUBJECT", "hello"], "US-ASCII")
+ # #=> [6, 7, 8, 1]
+ #
+ # See [SORT-THREAD-EXT] for more details.
+ def sort(sort_keys, search_keys, charset)
+ return sort_internal("SORT", sort_keys, search_keys, charset)
+ end
+
+ # As for #sort(), but returns an array of unique identifiers.
+ def uid_sort(sort_keys, search_keys, charset)
+ return sort_internal("UID SORT", sort_keys, search_keys, charset)
+ end
+
+ # Adds a response handler. For example, to detect when
+ # the server sends us a new EXISTS response (which normally
+ # indicates new messages being added to the mail box),
+ # you could add the following handler after selecting the
+ # mailbox.
+ #
+ # imap.add_response_handler { |resp|
+ # if resp.kind_of?(Net::IMAP::UntaggedResponse) and resp.name == "EXISTS"
+ # puts "Mailbox now has #{resp.data} messages"
+ # end
+ # }
+ #
+ def add_response_handler(handler = Proc.new)
+ @response_handlers.push(handler)
+ end
+
+ # Removes the response handler.
+ def remove_response_handler(handler)
+ @response_handlers.delete(handler)
+ end
+
+ # As for #search(), but returns message sequence numbers in threaded
+ # format, as a Net::IMAP::ThreadMember tree. The supported algorithms
+ # are:
+ #
+ # ORDEREDSUBJECT:: split into single-level threads according to subject,
+ # ordered by date.
+ # REFERENCES:: split into threads by parent/child relationships determined
+ # by which message is a reply to which.
+ #
+ # Unlike #search(), +charset+ is a required argument. US-ASCII
+ # and UTF-8 are sample values.
+ #
+ # See [SORT-THREAD-EXT] for more details.
+ def thread(algorithm, search_keys, charset)
+ return thread_internal("THREAD", algorithm, search_keys, charset)
+ end
+
+ # As for #thread(), but returns unique identifiers instead of
+ # message sequence numbers.
+ def uid_thread(algorithm, search_keys, charset)
+ return thread_internal("UID THREAD", algorithm, search_keys, charset)
+ end
+
+ # Decode a string from modified UTF-7 format to UTF-8.
+ #
+ # UTF-7 is a 7-bit encoding of Unicode [UTF7]. IMAP uses a
+ # slightly modified version of this to encode mailbox names
+ # containing non-ASCII characters; see [IMAP] section 5.1.3.
+ #
+ # Net::IMAP does _not_ automatically encode and decode
+ # mailbox names to and from utf7.
+ def self.decode_utf7(s)
+ return s.gsub(/&(.*?)-/n) {
+ if $1.empty?
+ "&"
+ else
+ base64 = $1.tr(",", "/")
+ x = base64.length % 4
+ if x > 0
+ base64.concat("=" * (4 - x))
+ end
+ base64.unpack("m")[0].unpack("n*").pack("U*")
+ end
+ }
+ end
+
+ # Encode a string from UTF-8 format to modified UTF-7.
+ def self.encode_utf7(s)
+ return s.gsub(/(&)|([^\x20-\x25\x27-\x7e]+)/n) { |x|
+ if $1
+ "&-"
+ else
+ base64 = [x.unpack("U*").pack("n*")].pack("m")
+ "&" + base64.delete("=\n").tr("/", ",") + "-"
+ end
+ }
+ end
+
+ private
+
+ CRLF = "\r\n" # :nodoc:
+ PORT = 143 # :nodoc:
+
+ @@debug = false
+ @@authenticators = {}
+
+ # Creates a new Net::IMAP object and connects it to the specified
+ # +port+ (143 by default) on the named +host+. If +usessl+ is true,
+ # then an attempt will
+ # be made to use SSL (now TLS) to connect to the server. For this
+ # to work OpenSSL [OSSL] and the Ruby OpenSSL [RSSL]
+ # extensions need to be installed. The +certs+ parameter indicates
+ # the path or file containing the CA cert of the server, and the
+ # +verify+ parameter is for the OpenSSL verification callback.
+ #
+ # The most common errors are:
+ #
+ # Errno::ECONNREFUSED:: connection refused by +host+ or an intervening
+ # firewall.
+ # Errno::ETIMEDOUT:: connection timed out (possibly due to packets
+ # being dropped by an intervening firewall).
+ # Errno::ENETUNREACH:: there is no route to that network.
+ # SocketError:: hostname not known or other socket error.
+ # Net::IMAP::ByeResponseError:: we connected to the host, but they
+ # immediately said goodbye to us.
+ def initialize(host, port = PORT, usessl = false, certs = nil, verify = false)
+ super()
+ @host = host
+ @port = port
+ @tag_prefix = "RUBY"
+ @tagno = 0
+ @parser = ResponseParser.new
+ @sock = TCPSocket.open(host, port)
+ if usessl
+ unless defined?(OpenSSL)
+ raise "SSL extension not installed"
+ end
+ @usessl = true
+
+ # verify the server.
+ context = SSLContext::new()
+ context.ca_file = certs if certs && FileTest::file?(certs)
+ context.ca_path = certs if certs && FileTest::directory?(certs)
+ context.verify_mode = VERIFY_PEER if verify
+ if defined?(VerifyCallbackProc)
+ context.verify_callback = VerifyCallbackProc
+ end
+ @sock = SSLSocket.new(@sock, context)
+ @sock.connect # start ssl session.
+ else
+ @usessl = false
+ end
+ @responses = Hash.new([].freeze)
+ @tagged_responses = {}
+ @response_handlers = []
+ @tagged_response_arrival = new_cond
+ @continuation_request_arrival = new_cond
+ @logout_command_tag = nil
+ @debug_output_bol = true
+
+ @greeting = get_response
+ if @greeting.name == "BYE"
+ @sock.close
+ raise ByeResponseError, @greeting.raw_data
+ end
+
+ @client_thread = Thread.current
+ @receiver_thread = Thread.start {
+ receive_responses
+ }
+ end
+
+ def receive_responses
+ while true
+ begin
+ resp = get_response
+ rescue Exception
+ @sock.close
+ @client_thread.raise($!)
+ break
+ end
+ break unless resp
+ begin
+ synchronize do
+ case resp
+ when TaggedResponse
+ @tagged_responses[resp.tag] = resp
+ @tagged_response_arrival.broadcast
+ if resp.tag == @logout_command_tag
+ return
+ end
+ when UntaggedResponse
+ record_response(resp.name, resp.data)
+ if resp.data.instance_of?(ResponseText) &&
+ (code = resp.data.code)
+ record_response(code.name, code.data)
+ end
+ if resp.name == "BYE" && @logout_command_tag.nil?
+ @sock.close
+ raise ByeResponseError, resp.raw_data
+ end
+ when ContinuationRequest
+ @continuation_request_arrival.signal
+ end
+ @response_handlers.each do |handler|
+ handler.call(resp)
+ end
+ end
+ rescue Exception
+ @client_thread.raise($!)
+ end
+ end
+ end
+
+ def get_tagged_response(tag, cmd)
+ until @tagged_responses.key?(tag)
+ @tagged_response_arrival.wait
+ end
+ resp = @tagged_responses.delete(tag)
+ case resp.name
+ when /\A(?:NO)\z/ni
+ raise NoResponseError, resp.data.text
+ when /\A(?:BAD)\z/ni
+ raise BadResponseError, resp.data.text
+ else
+ return resp
+ end
+ end
+
+ def get_response
+ buff = ""
+ while true
+ s = @sock.gets(CRLF)
+ break unless s
+ buff.concat(s)
+ if /\{(\d+)\}\r\n/n =~ s
+ s = @sock.read($1.to_i)
+ buff.concat(s)
+ else
+ break
+ end
+ end
+ return nil if buff.length == 0
+ if @@debug
+ $stderr.print(buff.gsub(/^/n, "S: "))
+ end
+ return @parser.parse(buff)
+ end
+
+ def record_response(name, data)
+ unless @responses.has_key?(name)
+ @responses[name] = []
+ end
+ @responses[name].push(data)
+ end
+
+ def send_command(cmd, *args, &block)
+ synchronize do
+ tag = generate_tag
+ put_string(tag + " " + cmd)
+ args.each do |i|
+ put_string(" ")
+ send_data(i)
+ end
+ put_string(CRLF)
+ if cmd == "LOGOUT"
+ @logout_command_tag = tag
+ end
+ if block
+ add_response_handler(block)
+ end
+ begin
+ return get_tagged_response(tag, cmd)
+ ensure
+ if block
+ remove_response_handler(block)
+ end
+ end
+ end
+ end
+
+ def generate_tag
+ @tagno += 1
+ return format("%s%04d", @tag_prefix, @tagno)
+ end
+
+ def put_string(str)
+ @sock.print(str)
+ if @@debug
+ if @debug_output_bol
+ $stderr.print("C: ")
+ end
+ $stderr.print(str.gsub(/\n(?!\z)/n, "\nC: "))
+ if /\r\n\z/n.match(str)
+ @debug_output_bol = true
+ else
+ @debug_output_bol = false
+ end
+ end
+ end
+
+ def send_data(data)
+ case data
+ when nil
+ put_string("NIL")
+ when String
+ send_string_data(data)
+ when Integer
+ send_number_data(data)
+ when Array
+ send_list_data(data)
+ when Time
+ send_time_data(data)
+ when Symbol
+ send_symbol_data(data)
+ else
+ data.send_data(self)
+ end
+ end
+
+ def send_string_data(str)
+ case str
+ when ""
+ put_string('""')
+ when /[\x80-\xff\r\n]/n
+ # literal
+ send_literal(str)
+ when /[(){ \x00-\x1f\x7f%*"\\]/n
+ # quoted string
+ send_quoted_string(str)
+ else
+ put_string(str)
+ end
+ end
+
+ def send_quoted_string(str)
+ put_string('"' + str.gsub(/["\\]/n, "\\\\\\&") + '"')
+ end
+
+ def send_literal(str)
+ put_string("{" + str.length.to_s + "}" + CRLF)
+ @continuation_request_arrival.wait
+ put_string(str)
+ end
+
+ def send_number_data(num)
+ if num < 0 || num >= 4294967296
+ raise DataFormatError, num.to_s
+ end
+ put_string(num.to_s)
+ end
+
+ def send_list_data(list)
+ put_string("(")
+ first = true
+ list.each do |i|
+ if first
+ first = false
+ else
+ put_string(" ")
+ end
+ send_data(i)
+ end
+ put_string(")")
+ end
+
+ DATE_MONTH = %w(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec)
+
+ def send_time_data(time)
+ t = time.dup.gmtime
+ s = format('"%2d-%3s-%4d %02d:%02d:%02d +0000"',
+ t.day, DATE_MONTH[t.month - 1], t.year,
+ t.hour, t.min, t.sec)
+ put_string(s)
+ end
+
+ def send_symbol_data(symbol)
+ put_string("\\" + symbol.to_s)
+ end
+
+ def search_internal(cmd, keys, charset)
+ if keys.instance_of?(String)
+ keys = [RawData.new(keys)]
+ else
+ normalize_searching_criteria(keys)
+ end
+ synchronize do
+ if charset
+ send_command(cmd, "CHARSET", charset, *keys)
+ else
+ send_command(cmd, *keys)
+ end
+ return @responses.delete("SEARCH")[-1]
+ end
+ end
+
+ def fetch_internal(cmd, set, attr)
+ if attr.instance_of?(String)
+ attr = RawData.new(attr)
+ end
+ synchronize do
+ @responses.delete("FETCH")
+ send_command(cmd, MessageSet.new(set), attr)
+ return @responses.delete("FETCH")
+ end
+ end
+
+ def store_internal(cmd, set, attr, flags)
+ if attr.instance_of?(String)
+ attr = RawData.new(attr)
+ end
+ synchronize do
+ @responses.delete("FETCH")
+ send_command(cmd, MessageSet.new(set), attr, flags)
+ return @responses.delete("FETCH")
+ end
+ end
+
+ def copy_internal(cmd, set, mailbox)
+ send_command(cmd, MessageSet.new(set), mailbox)
+ end
+
+ def sort_internal(cmd, sort_keys, search_keys, charset)
+ if search_keys.instance_of?(String)
+ search_keys = [RawData.new(search_keys)]
+ else
+ normalize_searching_criteria(search_keys)
+ end
+ normalize_searching_criteria(search_keys)
+ synchronize do
+ send_command(cmd, sort_keys, charset, *search_keys)
+ return @responses.delete("SORT")[-1]
+ end
+ end
+
+ def thread_internal(cmd, algorithm, search_keys, charset)
+ if search_keys.instance_of?(String)
+ search_keys = [RawData.new(search_keys)]
+ else
+ normalize_searching_criteria(search_keys)
+ end
+ normalize_searching_criteria(search_keys)
+ send_command(cmd, algorithm, charset, *search_keys)
+ return @responses.delete("THREAD")[-1]
+ end
+
+ def normalize_searching_criteria(keys)
+ keys.collect! do |i|
+ case i
+ when -1, Range, Array
+ MessageSet.new(i)
+ else
+ i
+ end
+ end
+ end
+
+ class RawData # :nodoc:
+ def send_data(imap)
+ imap.send(:put_string, @data)
+ end
+
+ private
+
+ def initialize(data)
+ @data = data
+ end
+ end
+
+ class Atom # :nodoc:
+ def send_data(imap)
+ imap.send(:put_string, @data)
+ end
+
+ private
+
+ def initialize(data)
+ @data = data
+ end
+ end
+
+ class QuotedString # :nodoc:
+ def send_data(imap)
+ imap.send(:send_quoted_string, @data)
+ end
+
+ private
+
+ def initialize(data)
+ @data = data
+ end
+ end
+
+ class Literal # :nodoc:
+ def send_data(imap)
+ imap.send(:send_literal, @data)
+ end
+
+ private
+
+ def initialize(data)
+ @data = data
+ end
+ end
+
+ class MessageSet # :nodoc:
+ def send_data(imap)
+ imap.send(:put_string, format_internal(@data))
+ end
+
+ private
+
+ def initialize(data)
+ @data = data
+ end
+
+ def format_internal(data)
+ case data
+ when "*"
+ return data
+ when Integer
+ ensure_nz_number(data)
+ if data == -1
+ return "*"
+ else
+ return data.to_s
+ end
+ when Range
+ return format_internal(data.first) +
+ ":" + format_internal(data.last)
+ when Array
+ return data.collect {|i| format_internal(i)}.join(",")
+ when ThreadMember
+ return data.seqno.to_s +
+ ":" + data.children.collect {|i| format_internal(i).join(",")}
+ else
+ raise DataFormatError, data.inspect
+ end
+ end
+
+ def ensure_nz_number(num)
+ if num < -1 || num == 0 || num >= 4294967296
+ msg = "nz_number must be non-zero unsigned 32-bit integer: " +
+ num.inspect
+ raise DataFormatError, msg
+ end
+ end
+ end
+
+ # Net::IMAP::ContinuationRequest represents command continuation requests.
+ #
+ # The command continuation request response is indicated by a "+" token
+ # instead of a tag. This form of response indicates that the server is
+ # ready to accept the continuation of a command from the client. The
+ # remainder of this response is a line of text.
+ #
+ # continue_req ::= "+" SPACE (resp_text / base64)
+ #
+ # ==== Fields:
+ #
+ # data:: Returns the data (Net::IMAP::ResponseText).
+ #
+ # raw_data:: Returns the raw data string.
+ ContinuationRequest = Struct.new(:data, :raw_data)
+
+ # Net::IMAP::UntaggedResponse represents untagged responses.
+ #
+ # Data transmitted by the server to the client and status responses
+ # that do not indicate command completion are prefixed with the token
+ # "*", and are called untagged responses.
+ #
+ # response_data ::= "*" SPACE (resp_cond_state / resp_cond_bye /
+ # mailbox_data / message_data / capability_data)
+ #
+ # ==== Fields:
+ #
+ # name:: Returns the name such as "FLAGS", "LIST", "FETCH"....
+ #
+ # data:: Returns the data such as an array of flag symbols,
+ # a ((<Net::IMAP::MailboxList>)) object....
+ #
+ # raw_data:: Returns the raw data string.
+ UntaggedResponse = Struct.new(:name, :data, :raw_data)
+
+ # Net::IMAP::TaggedResponse represents tagged responses.
+ #
+ # The server completion result response indicates the success or
+ # failure of the operation. It is tagged with the same tag as the
+ # client command which began the operation.
+ #
+ # response_tagged ::= tag SPACE resp_cond_state CRLF
+ #
+ # tag ::= 1*<any ATOM_CHAR except "+">
+ #
+ # resp_cond_state ::= ("OK" / "NO" / "BAD") SPACE resp_text
+ #
+ # ==== Fields:
+ #
+ # tag:: Returns the tag.
+ #
+ # name:: Returns the name. the name is one of "OK", "NO", "BAD".
+ #
+ # data:: Returns the data. See ((<Net::IMAP::ResponseText>)).
+ #
+ # raw_data:: Returns the raw data string.
+ #
+ TaggedResponse = Struct.new(:tag, :name, :data, :raw_data)
+
+ # Net::IMAP::ResponseText represents texts of responses.
+ # The text may be prefixed by the response code.
+ #
+ # resp_text ::= ["[" resp_text_code "]" SPACE] (text_mime2 / text)
+ # ;; text SHOULD NOT begin with "[" or "="
+ #
+ # ==== Fields:
+ #
+ # code:: Returns the response code. See ((<Net::IMAP::ResponseCode>)).
+ #
+ # text:: Returns the text.
+ #
+ ResponseText = Struct.new(:code, :text)
+
+ #
+ # Net::IMAP::ResponseCode represents response codes.
+ #
+ # resp_text_code ::= "ALERT" / "PARSE" /
+ # "PERMANENTFLAGS" SPACE "(" #(flag / "\*") ")" /
+ # "READ-ONLY" / "READ-WRITE" / "TRYCREATE" /
+ # "UIDVALIDITY" SPACE nz_number /
+ # "UNSEEN" SPACE nz_number /
+ # atom [SPACE 1*<any TEXT_CHAR except "]">]
+ #
+ # ==== Fields:
+ #
+ # name:: Returns the name such as "ALERT", "PERMANENTFLAGS", "UIDVALIDITY"....
+ #
+ # data:: Returns the data if it exists.
+ #
+ ResponseCode = Struct.new(:name, :data)
+
+ # Net::IMAP::MailboxList represents contents of the LIST response.
+ #
+ # mailbox_list ::= "(" #("\Marked" / "\Noinferiors" /
+ # "\Noselect" / "\Unmarked" / flag_extension) ")"
+ # SPACE (<"> QUOTED_CHAR <"> / nil) SPACE mailbox
+ #
+ # ==== Fields:
+ #
+ # attr:: Returns the name attributes. Each name attribute is a symbol
+ # capitalized by String#capitalize, such as :Noselect (not :NoSelect).
+ #
+ # delim:: Returns the hierarchy delimiter
+ #
+ # name:: Returns the mailbox name.
+ #
+ MailboxList = Struct.new(:attr, :delim, :name)
+
+ # Net::IMAP::MailboxQuota represents contents of GETQUOTA response.
+ # This object can also be a response to GETQUOTAROOT. In the syntax
+ # specification below, the delimiter used with the "#" construct is a
+ # single space (SPACE).
+ #
+ # quota_list ::= "(" #quota_resource ")"
+ #
+ # quota_resource ::= atom SPACE number SPACE number
+ #
+ # quota_response ::= "QUOTA" SPACE astring SPACE quota_list
+ #
+ # ==== Fields:
+ #
+ # mailbox:: The mailbox with the associated quota.
+ #
+ # usage:: Current storage usage of mailbox.
+ #
+ # quota:: Quota limit imposed on mailbox.
+ #
+ MailboxQuota = Struct.new(:mailbox, :usage, :quota)
+
+ # Net::IMAP::MailboxQuotaRoot represents part of the GETQUOTAROOT
+ # response. (GETQUOTAROOT can also return Net::IMAP::MailboxQuota.)
+ #
+ # quotaroot_response ::= "QUOTAROOT" SPACE astring *(SPACE astring)
+ #
+ # ==== Fields:
+ #
+ # mailbox:: The mailbox with the associated quota.
+ #
+ # quotaroots:: Zero or more quotaroots that effect the quota on the
+ # specified mailbox.
+ #
+ MailboxQuotaRoot = Struct.new(:mailbox, :quotaroots)
+
+ # Net::IMAP::MailboxACLItem represents response from GETACL.
+ #
+ # acl_data ::= "ACL" SPACE mailbox *(SPACE identifier SPACE rights)
+ #
+ # identifier ::= astring
+ #
+ # rights ::= astring
+ #
+ # ==== Fields:
+ #
+ # user:: Login name that has certain rights to the mailbox
+ # that was specified with the getacl command.
+ #
+ # rights:: The access rights the indicated user has to the
+ # mailbox.
+ #
+ MailboxACLItem = Struct.new(:user, :rights)
+
+ # Net::IMAP::StatusData represents contents of the STATUS response.
+ #
+ # ==== Fields:
+ #
+ # mailbox:: Returns the mailbox name.
+ #
+ # attr:: Returns a hash. Each key is one of "MESSAGES", "RECENT", "UIDNEXT",
+ # "UIDVALIDITY", "UNSEEN". Each value is a number.
+ #
+ StatusData = Struct.new(:mailbox, :attr)
+
+ # Net::IMAP::FetchData represents contents of the FETCH response.
+ #
+ # ==== Fields:
+ #
+ # seqno:: Returns the message sequence number.
+ # (Note: not the unique identifier, even for the UID command response.)
+ #
+ # attr:: Returns a hash. Each key is a data item name, and each value is
+ # its value.
+ #
+ # The current data items are:
+ #
+ # [BODY]
+ # A form of BODYSTRUCTURE without extension data.
+ # [BODY[<section>]<<origin_octet>>]
+ # A string expressing the body contents of the specified section.
+ # [BODYSTRUCTURE]
+ # An object that describes the [MIME-IMB] body structure of a message.
+ # See Net::IMAP::BodyTypeBasic, Net::IMAP::BodyTypeText,
+ # Net::IMAP::BodyTypeMessage, Net::IMAP::BodyTypeMultipart.
+ # [ENVELOPE]
+ # A Net::IMAP::Envelope object that describes the envelope
+ # structure of a message.
+ # [FLAGS]
+ # A array of flag symbols that are set for this message. flag symbols
+ # are capitalized by String#capitalize.
+ # [INTERNALDATE]
+ # A string representing the internal date of the message.
+ # [RFC822]
+ # Equivalent to BODY[].
+ # [RFC822.HEADER]
+ # Equivalent to BODY.PEEK[HEADER].
+ # [RFC822.SIZE]
+ # A number expressing the [RFC-822] size of the message.
+ # [RFC822.TEXT]
+ # Equivalent to BODY[TEXT].
+ # [UID]
+ # A number expressing the unique identifier of the message.
+ #
+ FetchData = Struct.new(:seqno, :attr)
+
+ # Net::IMAP::Envelope represents envelope structures of messages.
+ #
+ # ==== Fields:
+ #
+ # date:: Returns a string that represents the date.
+ #
+ # subject:: Returns a string that represents the subject.
+ #
+ # from:: Returns an array of Net::IMAP::Address that represents the from.
+ #
+ # sender:: Returns an array of Net::IMAP::Address that represents the sender.
+ #
+ # reply_to:: Returns an array of Net::IMAP::Address that represents the reply-to.
+ #
+ # to:: Returns an array of Net::IMAP::Address that represents the to.
+ #
+ # cc:: Returns an array of Net::IMAP::Address that represents the cc.
+ #
+ # bcc:: Returns an array of Net::IMAP::Address that represents the bcc.
+ #
+ # in_reply_to:: Returns a string that represents the in-reply-to.
+ #
+ # message_id:: Returns a string that represents the message-id.
+ #
+ Envelope = Struct.new(:date, :subject, :from, :sender, :reply_to,
+ :to, :cc, :bcc, :in_reply_to, :message_id)
+
+ #
+ # Net::IMAP::Address represents electronic mail addresses.
+ #
+ # ==== Fields:
+ #
+ # name:: Returns the phrase from [RFC-822] mailbox.
+ #
+ # route:: Returns the route from [RFC-822] route-addr.
+ #
+ # mailbox:: nil indicates end of [RFC-822] group.
+ # If non-nil and host is nil, returns [RFC-822] group name.
+ # Otherwise, returns [RFC-822] local-part
+ #
+ # host:: nil indicates [RFC-822] group syntax.
+ # Otherwise, returns [RFC-822] domain name.
+ #
+ Address = Struct.new(:name, :route, :mailbox, :host)
+
+ #
+ # Net::IMAP::ContentDisposition represents Content-Disposition fields.
+ #
+ # ==== Fields:
+ #
+ # dsp_type:: Returns the disposition type.
+ #
+ # param:: Returns a hash that represents parameters of the Content-Disposition
+ # field.
+ #
+ ContentDisposition = Struct.new(:dsp_type, :param)
+
+ # Net::IMAP::ThreadMember represents a thread-node returned
+ # by Net::IMAP#thread
+ #
+ # ==== Fields:
+ #
+ # seqno:: The sequence number of this message.
+ #
+ # children:: an array of Net::IMAP::ThreadMember objects for mail
+ # items that are children of this in the thread.
+ #
+ ThreadMember = Struct.new(:seqno, :children)
+
+ # Net::IMAP::BodyTypeBasic represents basic body structures of messages.
+ #
+ # ==== Fields:
+ #
+ # media_type:: Returns the content media type name as defined in [MIME-IMB].
+ #
+ # subtype:: Returns the content subtype name as defined in [MIME-IMB].
+ #
+ # param:: Returns a hash that represents parameters as defined in [MIME-IMB].
+ #
+ # content_id:: Returns a string giving the content id as defined in [MIME-IMB].
+ #
+ # description:: Returns a string giving the content description as defined in
+ # [MIME-IMB].
+ #
+ # encoding:: Returns a string giving the content transfer encoding as defined in
+ # [MIME-IMB].
+ #
+ # size:: Returns a number giving the size of the body in octets.
+ #
+ # md5:: Returns a string giving the body MD5 value as defined in [MD5].
+ #
+ # disposition:: Returns a Net::IMAP::ContentDisposition object giving
+ # the content disposition.
+ #
+ # language:: Returns a string or an array of strings giving the body
+ # language value as defined in [LANGUAGE-TAGS].
+ #
+ # extension:: Returns extension data.
+ #
+ # multipart?:: Returns false.
+ #
+ class BodyTypeBasic < Struct.new(:media_type, :subtype,
+ :param, :content_id,
+ :description, :encoding, :size,
+ :md5, :disposition, :language,
+ :extension)
+ def multipart?
+ return false
+ end
+
+ # Obsolete: use +subtype+ instead. Calling this will
+ # generate a warning message to +stderr+, then return
+ # the value of +subtype+.
+ def media_subtype
+ $stderr.printf("warning: media_subtype is obsolete.\n")
+ $stderr.printf(" use subtype instead.\n")
+ return subtype
+ end
+ end
+
+ # Net::IMAP::BodyTypeText represents TEXT body structures of messages.
+ #
+ # ==== Fields:
+ #
+ # lines:: Returns the size of the body in text lines.
+ #
+ # And Net::IMAP::BodyTypeText has all fields of Net::IMAP::BodyTypeBasic.
+ #
+ class BodyTypeText < Struct.new(:media_type, :subtype,
+ :param, :content_id,
+ :description, :encoding, :size,
+ :lines,
+ :md5, :disposition, :language,
+ :extension)
+ def multipart?
+ return false
+ end
+
+ # Obsolete: use +subtype+ instead. Calling this will
+ # generate a warning message to +stderr+, then return
+ # the value of +subtype+.
+ def media_subtype
+ $stderr.printf("warning: media_subtype is obsolete.\n")
+ $stderr.printf(" use subtype instead.\n")
+ return subtype
+ end
+ end
+
+ # Net::IMAP::BodyTypeMessage represents MESSAGE/RFC822 body structures of messages.
+ #
+ # ==== Fields:
+ #
+ # envelope:: Returns a Net::IMAP::Envelope giving the envelope structure.
+ #
+ # body:: Returns an object giving the body structure.
+ #
+ # And Net::IMAP::BodyTypeMessage has all methods of Net::IMAP::BodyTypeText.
+ #
+ class BodyTypeMessage < Struct.new(:media_type, :subtype,
+ :param, :content_id,
+ :description, :encoding, :size,
+ :envelope, :body, :lines,
+ :md5, :disposition, :language,
+ :extension)
+ def multipart?
+ return false
+ end
+
+ # Obsolete: use +subtype+ instead. Calling this will
+ # generate a warning message to +stderr+, then return
+ # the value of +subtype+.
+ def media_subtype
+ $stderr.printf("warning: media_subtype is obsolete.\n")
+ $stderr.printf(" use subtype instead.\n")
+ return subtype
+ end
+ end
+
+ # Net::IMAP::BodyTypeMultipart represents multipart body structures
+ # of messages.
+ #
+ # ==== Fields:
+ #
+ # media_type:: Returns the content media type name as defined in [MIME-IMB].
+ #
+ # subtype:: Returns the content subtype name as defined in [MIME-IMB].
+ #
+ # parts:: Returns multiple parts.
+ #
+ # param:: Returns a hash that represents parameters as defined in [MIME-IMB].
+ #
+ # disposition:: Returns a Net::IMAP::ContentDisposition object giving
+ # the content disposition.
+ #
+ # language:: Returns a string or an array of strings giving the body
+ # language value as defined in [LANGUAGE-TAGS].
+ #
+ # extension:: Returns extension data.
+ #
+ # multipart?:: Returns true.
+ #
+ class BodyTypeMultipart < Struct.new(:media_type, :subtype,
+ :parts,
+ :param, :disposition, :language,
+ :extension)
+ def multipart?
+ return true
+ end
+
+ # Obsolete: use +subtype+ instead. Calling this will
+ # generate a warning message to +stderr+, then return
+ # the value of +subtype+.
+ def media_subtype
+ $stderr.printf("warning: media_subtype is obsolete.\n")
+ $stderr.printf(" use subtype instead.\n")
+ return subtype
+ end
+ end
+
+ class ResponseParser # :nodoc:
+ def parse(str)
+ @str = str
+ @pos = 0
+ @lex_state = EXPR_BEG
+ @token = nil
+ return response
+ end
+
+ private
+
+ EXPR_BEG = :EXPR_BEG
+ EXPR_DATA = :EXPR_DATA
+ EXPR_TEXT = :EXPR_TEXT
+ EXPR_RTEXT = :EXPR_RTEXT
+ EXPR_CTEXT = :EXPR_CTEXT
+
+ T_SPACE = :SPACE
+ T_NIL = :NIL
+ T_NUMBER = :NUMBER
+ T_ATOM = :ATOM
+ T_QUOTED = :QUOTED
+ T_LPAR = :LPAR
+ T_RPAR = :RPAR
+ T_BSLASH = :BSLASH
+ T_STAR = :STAR
+ T_LBRA = :LBRA
+ T_RBRA = :RBRA
+ T_LITERAL = :LITERAL
+ T_PLUS = :PLUS
+ T_PERCENT = :PERCENT
+ T_CRLF = :CRLF
+ T_EOF = :EOF
+ T_TEXT = :TEXT
+
+ BEG_REGEXP = /\G(?:\
+(?# 1: SPACE )( )|\
+(?# 2: NIL )(NIL)(?=[\x80-\xff(){ \x00-\x1f\x7f%*"\\\[\]+])|\
+(?# 3: NUMBER )(\d+)(?=[\x80-\xff(){ \x00-\x1f\x7f%*"\\\[\]+])|\
+(?# 4: ATOM )([^\x80-\xff(){ \x00-\x1f\x7f%*"\\\[\]+]+)|\
+(?# 5: QUOTED )"((?:[^\x00\r\n"\\]|\\["\\])*)"|\
+(?# 6: LPAR )(\()|\
+(?# 7: RPAR )(\))|\
+(?# 8: BSLASH )(\\)|\
+(?# 9: STAR )(\*)|\
+(?# 10: LBRA )(\[)|\
+(?# 11: RBRA )(\])|\
+(?# 12: LITERAL )\{(\d+)\}\r\n|\
+(?# 13: PLUS )(\+)|\
+(?# 14: PERCENT )(%)|\
+(?# 15: CRLF )(\r\n)|\
+(?# 16: EOF )(\z))/ni
+
+ DATA_REGEXP = /\G(?:\
+(?# 1: SPACE )( )|\
+(?# 2: NIL )(NIL)|\
+(?# 3: NUMBER )(\d+)|\
+(?# 4: QUOTED )"((?:[^\x00\r\n"\\]|\\["\\])*)"|\
+(?# 5: LITERAL )\{(\d+)\}\r\n|\
+(?# 6: LPAR )(\()|\
+(?# 7: RPAR )(\)))/ni
+
+ TEXT_REGEXP = /\G(?:\
+(?# 1: TEXT )([^\x00\r\n]*))/ni
+
+ RTEXT_REGEXP = /\G(?:\
+(?# 1: LBRA )(\[)|\
+(?# 2: TEXT )([^\x00\r\n]*))/ni
+
+ CTEXT_REGEXP = /\G(?:\
+(?# 1: TEXT )([^\x00\r\n\]]*))/ni
+
+ Token = Struct.new(:symbol, :value)
+
+ def response
+ token = lookahead
+ case token.symbol
+ when T_PLUS
+ result = continue_req
+ when T_STAR
+ result = response_untagged
+ else
+ result = response_tagged
+ end
+ match(T_CRLF)
+ match(T_EOF)
+ return result
+ end
+
+ def continue_req
+ match(T_PLUS)
+ match(T_SPACE)
+ return ContinuationRequest.new(resp_text, @str)
+ end
+
+ def response_untagged
+ match(T_STAR)
+ match(T_SPACE)
+ token = lookahead
+ if token.symbol == T_NUMBER
+ return numeric_response
+ elsif token.symbol == T_ATOM
+ case token.value
+ when /\A(?:OK|NO|BAD|BYE|PREAUTH)\z/ni
+ return response_cond
+ when /\A(?:FLAGS)\z/ni
+ return flags_response
+ when /\A(?:LIST|LSUB)\z/ni
+ return list_response
+ when /\A(?:QUOTA)\z/ni
+ return getquota_response
+ when /\A(?:QUOTAROOT)\z/ni
+ return getquotaroot_response
+ when /\A(?:ACL)\z/ni
+ return getacl_response
+ when /\A(?:SEARCH|SORT)\z/ni
+ return search_response
+ when /\A(?:THREAD)\z/ni
+ return thread_response
+ when /\A(?:STATUS)\z/ni
+ return status_response
+ when /\A(?:CAPABILITY)\z/ni
+ return capability_response
+ else
+ return text_response
+ end
+ else
+ parse_error("unexpected token %s", token.symbol)
+ end
+ end
+
+ def response_tagged
+ tag = atom
+ match(T_SPACE)
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ return TaggedResponse.new(tag, name, resp_text, @str)
+ end
+
+ def response_cond
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ return UntaggedResponse.new(name, resp_text, @str)
+ end
+
+ def numeric_response
+ n = number
+ match(T_SPACE)
+ token = match(T_ATOM)
+ name = token.value.upcase
+ case name
+ when "EXISTS", "RECENT", "EXPUNGE"
+ return UntaggedResponse.new(name, n, @str)
+ when "FETCH"
+ shift_token
+ match(T_SPACE)
+ data = FetchData.new(n, msg_att)
+ return UntaggedResponse.new(name, data, @str)
+ end
+ end
+
+ def msg_att
+ match(T_LPAR)
+ attr = {}
+ while true
+ token = lookahead
+ case token.symbol
+ when T_RPAR
+ shift_token
+ break
+ when T_SPACE
+ shift_token
+ token = lookahead
+ end
+ case token.value
+ when /\A(?:ENVELOPE)\z/ni
+ name, val = envelope_data
+ when /\A(?:FLAGS)\z/ni
+ name, val = flags_data
+ when /\A(?:INTERNALDATE)\z/ni
+ name, val = internaldate_data
+ when /\A(?:RFC822(?:\.HEADER|\.TEXT)?)\z/ni
+ name, val = rfc822_text
+ when /\A(?:RFC822\.SIZE)\z/ni
+ name, val = rfc822_size
+ when /\A(?:BODY(?:STRUCTURE)?)\z/ni
+ name, val = body_data
+ when /\A(?:UID)\z/ni
+ name, val = uid_data
+ else
+ parse_error("unknown attribute `%s'", token.value)
+ end
+ attr[name] = val
+ end
+ return attr
+ end
+
+ def envelope_data
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ return name, envelope
+ end
+
+ def envelope
+ @lex_state = EXPR_DATA
+ token = lookahead
+ if token.symbol == T_NIL
+ shift_token
+ result = nil
+ else
+ match(T_LPAR)
+ date = nstring
+ match(T_SPACE)
+ subject = nstring
+ match(T_SPACE)
+ from = address_list
+ match(T_SPACE)
+ sender = address_list
+ match(T_SPACE)
+ reply_to = address_list
+ match(T_SPACE)
+ to = address_list
+ match(T_SPACE)
+ cc = address_list
+ match(T_SPACE)
+ bcc = address_list
+ match(T_SPACE)
+ in_reply_to = nstring
+ match(T_SPACE)
+ message_id = nstring
+ match(T_RPAR)
+ result = Envelope.new(date, subject, from, sender, reply_to,
+ to, cc, bcc, in_reply_to, message_id)
+ end
+ @lex_state = EXPR_BEG
+ return result
+ end
+
+ def flags_data
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ return name, flag_list
+ end
+
+ def internaldate_data
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ token = match(T_QUOTED)
+ return name, token.value
+ end
+
+ def rfc822_text
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ return name, nstring
+ end
+
+ def rfc822_size
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ return name, number
+ end
+
+ def body_data
+ token = match(T_ATOM)
+ name = token.value.upcase
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ return name, body
+ end
+ name.concat(section)
+ token = lookahead
+ if token.symbol == T_ATOM
+ name.concat(token.value)
+ shift_token
+ end
+ match(T_SPACE)
+ data = nstring
+ return name, data
+ end
+
+ def body
+ @lex_state = EXPR_DATA
+ token = lookahead
+ if token.symbol == T_NIL
+ shift_token
+ result = nil
+ else
+ match(T_LPAR)
+ token = lookahead
+ if token.symbol == T_LPAR
+ result = body_type_mpart
+ else
+ result = body_type_1part
+ end
+ match(T_RPAR)
+ end
+ @lex_state = EXPR_BEG
+ return result
+ end
+
+ def body_type_1part
+ token = lookahead
+ case token.value
+ when /\A(?:TEXT)\z/ni
+ return body_type_text
+ when /\A(?:MESSAGE)\z/ni
+ return body_type_msg
+ else
+ return body_type_basic
+ end
+ end
+
+ def body_type_basic
+ mtype, msubtype = media_type
+ token = lookahead
+ if token.symbol == T_RPAR
+ return BodyTypeBasic.new(mtype, msubtype)
+ end
+ match(T_SPACE)
+ param, content_id, desc, enc, size = body_fields
+ md5, disposition, language, extension = body_ext_1part
+ return BodyTypeBasic.new(mtype, msubtype,
+ param, content_id,
+ desc, enc, size,
+ md5, disposition, language, extension)
+ end
+
+ def body_type_text
+ mtype, msubtype = media_type
+ match(T_SPACE)
+ param, content_id, desc, enc, size = body_fields
+ match(T_SPACE)
+ lines = number
+ md5, disposition, language, extension = body_ext_1part
+ return BodyTypeText.new(mtype, msubtype,
+ param, content_id,
+ desc, enc, size,
+ lines,
+ md5, disposition, language, extension)
+ end
+
+ def body_type_msg
+ mtype, msubtype = media_type
+ match(T_SPACE)
+ param, content_id, desc, enc, size = body_fields
+ match(T_SPACE)
+ env = envelope
+ match(T_SPACE)
+ b = body
+ match(T_SPACE)
+ lines = number
+ md5, disposition, language, extension = body_ext_1part
+ return BodyTypeMessage.new(mtype, msubtype,
+ param, content_id,
+ desc, enc, size,
+ env, b, lines,
+ md5, disposition, language, extension)
+ end
+
+ def body_type_mpart
+ parts = []
+ while true
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ break
+ end
+ parts.push(body)
+ end
+ mtype = "MULTIPART"
+ msubtype = case_insensitive_string
+ param, disposition, language, extension = body_ext_mpart
+ return BodyTypeMultipart.new(mtype, msubtype, parts,
+ param, disposition, language,
+ extension)
+ end
+
+ def media_type
+ mtype = case_insensitive_string
+ match(T_SPACE)
+ msubtype = case_insensitive_string
+ return mtype, msubtype
+ end
+
+ def body_fields
+ param = body_fld_param
+ match(T_SPACE)
+ content_id = nstring
+ match(T_SPACE)
+ desc = nstring
+ match(T_SPACE)
+ enc = case_insensitive_string
+ match(T_SPACE)
+ size = number
+ return param, content_id, desc, enc, size
+ end
+
+ def body_fld_param
+ token = lookahead
+ if token.symbol == T_NIL
+ shift_token
+ return nil
+ end
+ match(T_LPAR)
+ param = {}
+ while true
+ token = lookahead
+ case token.symbol
+ when T_RPAR
+ shift_token
+ break
+ when T_SPACE
+ shift_token
+ end
+ name = case_insensitive_string
+ match(T_SPACE)
+ val = string
+ param[name] = val
+ end
+ return param
+ end
+
+ def body_ext_1part
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ else
+ return nil
+ end
+ md5 = nstring
+
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ else
+ return md5
+ end
+ disposition = body_fld_dsp
+
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ else
+ return md5, disposition
+ end
+ language = body_fld_lang
+
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ else
+ return md5, disposition, language
+ end
+
+ extension = body_extensions
+ return md5, disposition, language, extension
+ end
+
+ def body_ext_mpart
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ else
+ return nil
+ end
+ param = body_fld_param
+
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ else
+ return param
+ end
+ disposition = body_fld_dsp
+ match(T_SPACE)
+ language = body_fld_lang
+
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ else
+ return param, disposition, language
+ end
+
+ extension = body_extensions
+ return param, disposition, language, extension
+ end
+
+ def body_fld_dsp
+ token = lookahead
+ if token.symbol == T_NIL
+ shift_token
+ return nil
+ end
+ match(T_LPAR)
+ dsp_type = case_insensitive_string
+ match(T_SPACE)
+ param = body_fld_param
+ match(T_RPAR)
+ return ContentDisposition.new(dsp_type, param)
+ end
+
+ def body_fld_lang
+ token = lookahead
+ if token.symbol == T_LPAR
+ shift_token
+ result = []
+ while true
+ token = lookahead
+ case token.symbol
+ when T_RPAR
+ shift_token
+ return result
+ when T_SPACE
+ shift_token
+ end
+ result.push(case_insensitive_string)
+ end
+ else
+ lang = nstring
+ if lang
+ return lang.upcase
+ else
+ return lang
+ end
+ end
+ end
+
+ def body_extensions
+ result = []
+ while true
+ token = lookahead
+ case token.symbol
+ when T_RPAR
+ return result
+ when T_SPACE
+ shift_token
+ end
+ result.push(body_extension)
+ end
+ end
+
+ def body_extension
+ token = lookahead
+ case token.symbol
+ when T_LPAR
+ shift_token
+ result = body_extensions
+ match(T_RPAR)
+ return result
+ when T_NUMBER
+ return number
+ else
+ return nstring
+ end
+ end
+
+ def section
+ str = ""
+ token = match(T_LBRA)
+ str.concat(token.value)
+ token = match(T_ATOM, T_NUMBER, T_RBRA)
+ if token.symbol == T_RBRA
+ str.concat(token.value)
+ return str
+ end
+ str.concat(token.value)
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ str.concat(token.value)
+ token = match(T_LPAR)
+ str.concat(token.value)
+ while true
+ token = lookahead
+ case token.symbol
+ when T_RPAR
+ str.concat(token.value)
+ shift_token
+ break
+ when T_SPACE
+ shift_token
+ str.concat(token.value)
+ end
+ str.concat(format_string(astring))
+ end
+ end
+ token = match(T_RBRA)
+ str.concat(token.value)
+ return str
+ end
+
+ def format_string(str)
+ case str
+ when ""
+ return '""'
+ when /[\x80-\xff\r\n]/n
+ # literal
+ return "{" + str.length.to_s + "}" + CRLF + str
+ when /[(){ \x00-\x1f\x7f%*"\\]/n
+ # quoted string
+ return '"' + str.gsub(/["\\]/n, "\\\\\\&") + '"'
+ else
+ # atom
+ return str
+ end
+ end
+
+ def uid_data
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ return name, number
+ end
+
+ def text_response
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ @lex_state = EXPR_TEXT
+ token = match(T_TEXT)
+ @lex_state = EXPR_BEG
+ return UntaggedResponse.new(name, token.value)
+ end
+
+ def flags_response
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ return UntaggedResponse.new(name, flag_list, @str)
+ end
+
+ def list_response
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ return UntaggedResponse.new(name, mailbox_list, @str)
+ end
+
+ def mailbox_list
+ attr = flag_list
+ match(T_SPACE)
+ token = match(T_QUOTED, T_NIL)
+ if token.symbol == T_NIL
+ delim = nil
+ else
+ delim = token.value
+ end
+ match(T_SPACE)
+ name = astring
+ return MailboxList.new(attr, delim, name)
+ end
+
+ def getquota_response
+ # If quota never established, get back
+ # `NO Quota root does not exist'.
+ # If quota removed, get `()' after the
+ # folder spec with no mention of `STORAGE'.
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ mailbox = astring
+ match(T_SPACE)
+ match(T_LPAR)
+ token = lookahead
+ case token.symbol
+ when T_RPAR
+ shift_token
+ data = MailboxQuota.new(mailbox, nil, nil)
+ return UntaggedResponse.new(name, data, @str)
+ when T_ATOM
+ shift_token
+ match(T_SPACE)
+ token = match(T_NUMBER)
+ usage = token.value
+ match(T_SPACE)
+ token = match(T_NUMBER)
+ quota = token.value
+ match(T_RPAR)
+ data = MailboxQuota.new(mailbox, usage, quota)
+ return UntaggedResponse.new(name, data, @str)
+ else
+ parse_error("unexpected token %s", token.symbol)
+ end
+ end
+
+ def getquotaroot_response
+ # Similar to getquota, but only admin can use getquota.
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ mailbox = astring
+ quotaroots = []
+ while true
+ token = lookahead
+ break unless token.symbol == T_SPACE
+ shift_token
+ quotaroots.push(astring)
+ end
+ data = MailboxQuotaRoot.new(mailbox, quotaroots)
+ return UntaggedResponse.new(name, data, @str)
+ end
+
+ def getacl_response
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ mailbox = astring
+ data = []
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ while true
+ token = lookahead
+ case token.symbol
+ when T_CRLF
+ break
+ when T_SPACE
+ shift_token
+ end
+ user = astring
+ match(T_SPACE)
+ rights = astring
+ ##XXX data.push([user, rights])
+ data.push(MailboxACLItem.new(user, rights))
+ end
+ end
+ return UntaggedResponse.new(name, data, @str)
+ end
+
+ def search_response
+ token = match(T_ATOM)
+ name = token.value.upcase
+ token = lookahead
+ if token.symbol == T_SPACE
+ shift_token
+ data = []
+ while true
+ token = lookahead
+ case token.symbol
+ when T_CRLF
+ break
+ when T_SPACE
+ shift_token
+ end
+ data.push(number)
+ end
+ else
+ data = []
+ end
+ return UntaggedResponse.new(name, data, @str)
+ end
+
+ def thread_response
+ token = match(T_ATOM)
+ name = token.value.upcase
+ token = lookahead
+
+ if token.symbol == T_SPACE
+ threads = []
+
+ while true
+ shift_token
+ token = lookahead
+
+ case token.symbol
+ when T_LPAR
+ threads << thread_branch(token)
+ when T_CRLF
+ break
+ end
+ end
+ else
+ # no member
+ threads = []
+ end
+
+ return UntaggedResponse.new(name, threads, @str)
+ end
+
+ def thread_branch(token)
+ rootmember = nil
+ lastmember = nil
+
+ while true
+ shift_token # ignore first T_LPAR
+ token = lookahead
+
+ case token.symbol
+ when T_NUMBER
+ # new member
+ newmember = ThreadMember.new(number, [])
+ if rootmember.nil?
+ rootmember = newmember
+ else
+ lastmember.children << newmember
+ end
+ lastmember = newmember
+ when T_SPACE
+ # do nothing
+ when T_LPAR
+ if rootmember.nil?
+ # dummy member
+ lastmember = rootmember = ThreadMember.new(nil, [])
+ end
+
+ lastmember.children << thread_branch(token)
+ when T_RPAR
+ break
+ end
+ end
+
+ return rootmember
+ end
+
+ def status_response
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ mailbox = astring
+ match(T_SPACE)
+ match(T_LPAR)
+ attr = {}
+ while true
+ token = lookahead
+ case token.symbol
+ when T_RPAR
+ shift_token
+ break
+ when T_SPACE
+ shift_token
+ end
+ token = match(T_ATOM)
+ key = token.value.upcase
+ match(T_SPACE)
+ val = number
+ attr[key] = val
+ end
+ data = StatusData.new(mailbox, attr)
+ return UntaggedResponse.new(name, data, @str)
+ end
+
+ def capability_response
+ token = match(T_ATOM)
+ name = token.value.upcase
+ match(T_SPACE)
+ data = []
+ while true
+ token = lookahead
+ case token.symbol
+ when T_CRLF
+ break
+ when T_SPACE
+ shift_token
+ end
+ data.push(atom.upcase)
+ end
+ return UntaggedResponse.new(name, data, @str)
+ end
+
+ def resp_text
+ @lex_state = EXPR_RTEXT
+ token = lookahead
+ if token.symbol == T_LBRA
+ code = resp_text_code
+ else
+ code = nil
+ end
+ token = match(T_TEXT)
+ @lex_state = EXPR_BEG
+ return ResponseText.new(code, token.value)
+ end
+
+ def resp_text_code
+ @lex_state = EXPR_BEG
+ match(T_LBRA)
+ token = match(T_ATOM)
+ name = token.value.upcase
+ case name
+ when /\A(?:ALERT|PARSE|READ-ONLY|READ-WRITE|TRYCREATE)\z/n
+ result = ResponseCode.new(name, nil)
+ when /\A(?:PERMANENTFLAGS)\z/n
+ match(T_SPACE)
+ result = ResponseCode.new(name, flag_list)
+ when /\A(?:UIDVALIDITY|UIDNEXT|UNSEEN)\z/n
+ match(T_SPACE)
+ result = ResponseCode.new(name, number)
+ else
+ match(T_SPACE)
+ @lex_state = EXPR_CTEXT
+ token = match(T_TEXT)
+ @lex_state = EXPR_BEG
+ result = ResponseCode.new(name, token.value)
+ end
+ match(T_RBRA)
+ @lex_state = EXPR_RTEXT
+ return result
+ end
+
+ def address_list
+ token = lookahead
+ if token.symbol == T_NIL
+ shift_token
+ return nil
+ else
+ result = []
+ match(T_LPAR)
+ while true
+ token = lookahead
+ case token.symbol
+ when T_RPAR
+ shift_token
+ break
+ when T_SPACE
+ shift_token
+ end
+ result.push(address)
+ end
+ return result
+ end
+ end
+
+ ADDRESS_REGEXP = /\G\
+(?# 1: NAME )(?:NIL|"((?:[^\x80-\xff\x00\r\n"\\]|\\["\\])*)") \
+(?# 2: ROUTE )(?:NIL|"((?:[^\x80-\xff\x00\r\n"\\]|\\["\\])*)") \
+(?# 3: MAILBOX )(?:NIL|"((?:[^\x80-\xff\x00\r\n"\\]|\\["\\])*)") \
+(?# 4: HOST )(?:NIL|"((?:[^\x80-\xff\x00\r\n"\\]|\\["\\])*)")\
+\)/ni
+
+ def address
+ match(T_LPAR)
+ if @str.index(ADDRESS_REGEXP, @pos)
+ # address does not include literal.
+ @pos = $~.end(0)
+ name = $1
+ route = $2
+ mailbox = $3
+ host = $4
+ for s in [name, route, mailbox, host]
+ if s
+ s.gsub!(/\\(["\\])/n, "\\1")
+ end
+ end
+ else
+ name = nstring
+ match(T_SPACE)
+ route = nstring
+ match(T_SPACE)
+ mailbox = nstring
+ match(T_SPACE)
+ host = nstring
+ match(T_RPAR)
+ end
+ return Address.new(name, route, mailbox, host)
+ end
+
+# def flag_list
+# result = []
+# match(T_LPAR)
+# while true
+# token = lookahead
+# case token.symbol
+# when T_RPAR
+# shift_token
+# break
+# when T_SPACE
+# shift_token
+# end
+# result.push(flag)
+# end
+# return result
+# end
+
+# def flag
+# token = lookahead
+# if token.symbol == T_BSLASH
+# shift_token
+# token = lookahead
+# if token.symbol == T_STAR
+# shift_token
+# return token.value.intern
+# else
+# return atom.intern
+# end
+# else
+# return atom
+# end
+# end
+
+ FLAG_REGEXP = /\
+(?# FLAG )\\([^\x80-\xff(){ \x00-\x1f\x7f%"\\]+)|\
+(?# ATOM )([^\x80-\xff(){ \x00-\x1f\x7f%*"\\]+)/n
+
+ def flag_list
+ if @str.index(/\(([^)]*)\)/ni, @pos)
+ @pos = $~.end(0)
+ return $1.scan(FLAG_REGEXP).collect { |flag, atom|
+ atom || flag.capitalize.intern
+ }
+ else
+ parse_error("invalid flag list")
+ end
+ end
+
+ def nstring
+ token = lookahead
+ if token.symbol == T_NIL
+ shift_token
+ return nil
+ else
+ return string
+ end
+ end
+
+ def astring
+ token = lookahead
+ if string_token?(token)
+ return string
+ else
+ return atom
+ end
+ end
+
+ def string
+ token = lookahead
+ if token.symbol == T_NIL
+ shift_token
+ return nil
+ end
+ token = match(T_QUOTED, T_LITERAL)
+ return token.value
+ end
+
+ STRING_TOKENS = [T_QUOTED, T_LITERAL, T_NIL]
+
+ def string_token?(token)
+ return STRING_TOKENS.include?(token.symbol)
+ end
+
+ def case_insensitive_string
+ token = lookahead
+ if token.symbol == T_NIL
+ shift_token
+ return nil
+ end
+ token = match(T_QUOTED, T_LITERAL)
+ return token.value.upcase
+ end
+
+ def atom
+ result = ""
+ while true
+ token = lookahead
+ if atom_token?(token)
+ result.concat(token.value)
+ shift_token
+ else
+ if result.empty?
+ parse_error("unexpected token %s", token.symbol)
+ else
+ return result
+ end
+ end
+ end
+ end
+
+ ATOM_TOKENS = [
+ T_ATOM,
+ T_NUMBER,
+ T_NIL,
+ T_LBRA,
+ T_RBRA,
+ T_PLUS
+ ]
+
+ def atom_token?(token)
+ return ATOM_TOKENS.include?(token.symbol)
+ end
+
+ def number
+ token = lookahead
+ if token.symbol == T_NIL
+ shift_token
+ return nil
+ end
+ token = match(T_NUMBER)
+ return token.value.to_i
+ end
+
+ def nil_atom
+ match(T_NIL)
+ return nil
+ end
+
+ def match(*args)
+ token = lookahead
+ unless args.include?(token.symbol)
+ parse_error('unexpected token %s (expected %s)',
+ token.symbol.id2name,
+ args.collect {|i| i.id2name}.join(" or "))
+ end
+ shift_token
+ return token
+ end
+
+ def lookahead
+ unless @token
+ @token = next_token
+ end
+ return @token
+ end
+
+ def shift_token
+ @token = nil
+ end
+
+ def next_token
+ case @lex_state
+ when EXPR_BEG
+ if @str.index(BEG_REGEXP, @pos)
+ @pos = $~.end(0)
+ if $1
+ return Token.new(T_SPACE, $+)
+ elsif $2
+ return Token.new(T_NIL, $+)
+ elsif $3
+ return Token.new(T_NUMBER, $+)
+ elsif $4
+ return Token.new(T_ATOM, $+)
+ elsif $5
+ return Token.new(T_QUOTED,
+ $+.gsub(/\\(["\\])/n, "\\1"))
+ elsif $6
+ return Token.new(T_LPAR, $+)
+ elsif $7
+ return Token.new(T_RPAR, $+)
+ elsif $8
+ return Token.new(T_BSLASH, $+)
+ elsif $9
+ return Token.new(T_STAR, $+)
+ elsif $10
+ return Token.new(T_LBRA, $+)
+ elsif $11
+ return Token.new(T_RBRA, $+)
+ elsif $12
+ len = $+.to_i
+ val = @str[@pos, len]
+ @pos += len
+ return Token.new(T_LITERAL, val)
+ elsif $13
+ return Token.new(T_PLUS, $+)
+ elsif $14
+ return Token.new(T_PERCENT, $+)
+ elsif $15
+ return Token.new(T_CRLF, $+)
+ elsif $16
+ return Token.new(T_EOF, $+)
+ else
+ parse_error("[Net::IMAP BUG] BEG_REGEXP is invalid")
+ end
+ else
+ @str.index(/\S*/n, @pos)
+ parse_error("unknown token - %s", $&.dump)
+ end
+ when EXPR_DATA
+ if @str.index(DATA_REGEXP, @pos)
+ @pos = $~.end(0)
+ if $1
+ return Token.new(T_SPACE, $+)
+ elsif $2
+ return Token.new(T_NIL, $+)
+ elsif $3
+ return Token.new(T_NUMBER, $+)
+ elsif $4
+ return Token.new(T_QUOTED,
+ $+.gsub(/\\(["\\])/n, "\\1"))
+ elsif $5
+ len = $+.to_i
+ val = @str[@pos, len]
+ @pos += len
+ return Token.new(T_LITERAL, val)
+ elsif $6
+ return Token.new(T_LPAR, $+)
+ elsif $7
+ return Token.new(T_RPAR, $+)
+ else
+ parse_error("[Net::IMAP BUG] BEG_REGEXP is invalid")
+ end
+ else
+ @str.index(/\S*/n, @pos)
+ parse_error("unknown token - %s", $&.dump)
+ end
+ when EXPR_TEXT
+ if @str.index(TEXT_REGEXP, @pos)
+ @pos = $~.end(0)
+ if $1
+ return Token.new(T_TEXT, $+)
+ else
+ parse_error("[Net::IMAP BUG] TEXT_REGEXP is invalid")
+ end
+ else
+ @str.index(/\S*/n, @pos)
+ parse_error("unknown token - %s", $&.dump)
+ end
+ when EXPR_RTEXT
+ if @str.index(RTEXT_REGEXP, @pos)
+ @pos = $~.end(0)
+ if $1
+ return Token.new(T_LBRA, $+)
+ elsif $2
+ return Token.new(T_TEXT, $+)
+ else
+ parse_error("[Net::IMAP BUG] RTEXT_REGEXP is invalid")
+ end
+ else
+ @str.index(/\S*/n, @pos)
+ parse_error("unknown token - %s", $&.dump)
+ end
+ when EXPR_CTEXT
+ if @str.index(CTEXT_REGEXP, @pos)
+ @pos = $~.end(0)
+ if $1
+ return Token.new(T_TEXT, $+)
+ else
+ parse_error("[Net::IMAP BUG] CTEXT_REGEXP is invalid")
+ end
+ else
+ @str.index(/\S*/n, @pos) #/
+ parse_error("unknown token - %s", $&.dump)
+ end
+ else
+ parse_error("illegal @lex_state - %s", @lex_state.inspect)
+ end
+ end
+
+ def parse_error(fmt, *args)
+ if IMAP.debug
+ $stderr.printf("@str: %s\n", @str.dump)
+ $stderr.printf("@pos: %d\n", @pos)
+ $stderr.printf("@lex_state: %s\n", @lex_state)
+ if @token.symbol
+ $stderr.printf("@token.symbol: %s\n", @token.symbol)
+ $stderr.printf("@token.value: %s\n", @token.value.inspect)
+ end
+ end
+ raise ResponseParseError, format(fmt, *args)
+ end
+ end
+
+ # Authenticator for the "LOGIN" authentication type. See
+ # #authenticate().
+ class LoginAuthenticator
+ def process(data)
+ case @state
+ when STATE_USER
+ @state = STATE_PASSWORD
+ return @user
+ when STATE_PASSWORD
+ return @password
+ end
+ end
+
+ private
+
+ STATE_USER = :USER
+ STATE_PASSWORD = :PASSWORD
+
+ def initialize(user, password)
+ @user = user
+ @password = password
+ @state = STATE_USER
+ end
+ end
+ add_authenticator "LOGIN", LoginAuthenticator
+
+ # Authenticator for the "PLAIN" authentication type. See
+ # #authenticate().
+ class PlainAuthenticator
+ def process(data)
+ return "\0#{@user}\0#{@password}"
+ end
+
+ private
+
+ def initialize(user, password)
+ @user = user
+ @password = password
+ end
+ end
+ add_authenticator "PLAIN", PlainAuthenticator
+
+ # Authenticator for the "CRAM-MD5" authentication type. See
+ # #authenticate().
+ class CramMD5Authenticator
+ def process(challenge)
+ digest = hmac_md5(challenge, @password)
+ return @user + " " + digest
+ end
+
+ private
+
+ def initialize(user, password)
+ @user = user
+ @password = password
+ end
+
+ def hmac_md5(text, key)
+ if key.length > 64
+ key = Digest::MD5.digest(key)
+ end
+
+ k_ipad = key + "\0" * (64 - key.length)
+ k_opad = key + "\0" * (64 - key.length)
+ for i in 0..63
+ k_ipad[i] ^= 0x36
+ k_opad[i] ^= 0x5c
+ end
+
+ digest = Digest::MD5.digest(k_ipad + text)
+
+ return Digest::MD5.hexdigest(k_opad + digest)
+ end
+ end
+ add_authenticator "CRAM-MD5", CramMD5Authenticator
+
+ # Superclass of IMAP errors.
+ class Error < StandardError
+ end
+
+ # Error raised when data is in the incorrect format.
+ class DataFormatError < Error
+ end
+
+ # Error raised when a response from the server is non-parseable.
+ class ResponseParseError < Error
+ end
+
+ # Superclass of all errors used to encapsulate "fail" responses
+ # from the server.
+ class ResponseError < Error
+ end
+
+ # Error raised upon a "NO" response from the server, indicating
+ # that the client command could not be completed successfully.
+ class NoResponseError < ResponseError
+ end
+
+ # Error raised upon a "BAD" response from the server, indicating
+ # that the client command violated the IMAP protocol, or an internal
+ # server failure has occurred.
+ class BadResponseError < ResponseError
+ end
+
+ # Error raised upon a "BYE" response from the server, indicating
+ # that the client is not being allowed to login, or has been timed
+ # out due to inactivity.
+ class ByeResponseError < ResponseError
+ end
+ end
+end
+
+if __FILE__ == $0
+ # :enddoc:
+ require "getoptlong"
+
+ $stdout.sync = true
+ $port = nil
+ $user = ENV["USER"] || ENV["LOGNAME"]
+ $auth = "login"
+ $ssl = false
+
+ def usage
+ $stderr.print <<EOF
+usage: #{$0} [options] <host>
+
+ --help print this message
+ --port=PORT specifies port
+ --user=USER specifies user
+ --auth=AUTH specifies auth type
+ --ssl use ssl
+EOF
+ end
+
+ def get_password
+ print "password: "
+ system("stty", "-echo")
+ begin
+ return gets.chop
+ ensure
+ system("stty", "echo")
+ print "\n"
+ end
+ end
+
+ def get_command
+ printf("%s@%s> ", $user, $host)
+ if line = gets
+ return line.strip.split(/\s+/)
+ else
+ return nil
+ end
+ end
+
+ parser = GetoptLong.new
+ parser.set_options(['--debug', GetoptLong::NO_ARGUMENT],
+ ['--help', GetoptLong::NO_ARGUMENT],
+ ['--port', GetoptLong::REQUIRED_ARGUMENT],
+ ['--user', GetoptLong::REQUIRED_ARGUMENT],
+ ['--auth', GetoptLong::REQUIRED_ARGUMENT],
+ ['--ssl', GetoptLong::NO_ARGUMENT])
+ begin
+ parser.each_option do |name, arg|
+ case name
+ when "--port"
+ $port = arg
+ when "--user"
+ $user = arg
+ when "--auth"
+ $auth = arg
+ when "--ssl"
+ $ssl = true
+ when "--debug"
+ Net::IMAP.debug = true
+ when "--help"
+ usage
+ exit(1)
+ end
+ end
+ rescue
+ usage
+ exit(1)
+ end
+
+ $host = ARGV.shift
+ unless $host
+ usage
+ exit(1)
+ end
+ $port ||= $ssl ? 993 : 143
+
+ imap = Net::IMAP.new($host, $port, $ssl)
+ begin
+ password = get_password
+ imap.authenticate($auth, $user, password)
+ while true
+ cmd, *args = get_command
+ break unless cmd
+ begin
+ case cmd
+ when "list"
+ for mbox in imap.list("", args[0] || "*")
+ if mbox.attr.include?(Net::IMAP::NOSELECT)
+ prefix = "!"
+ elsif mbox.attr.include?(Net::IMAP::MARKED)
+ prefix = "*"
+ else
+ prefix = " "
+ end
+ print prefix, mbox.name, "\n"
+ end
+ when "select"
+ imap.select(args[0] || "inbox")
+ print "ok\n"
+ when "close"
+ imap.close
+ print "ok\n"
+ when "summary"
+ unless messages = imap.responses["EXISTS"][-1]
+ puts "not selected"
+ next
+ end
+ if messages > 0
+ for data in imap.fetch(1..-1, ["ENVELOPE"])
+ print data.seqno, ": ", data.attr["ENVELOPE"].subject, "\n"
+ end
+ else
+ puts "no message"
+ end
+ when "fetch"
+ if args[0]
+ data = imap.fetch(args[0].to_i, ["RFC822.HEADER", "RFC822.TEXT"])[0]
+ puts data.attr["RFC822.HEADER"]
+ puts data.attr["RFC822.TEXT"]
+ else
+ puts "missing argument"
+ end
+ when "logout", "exit", "quit"
+ break
+ when "help", "?"
+ print <<EOF
+list [pattern] list mailboxes
+select [mailbox] select mailbox
+close close mailbox
+summary display summary
+fetch [msgno] display message
+logout logout
+help, ? display help message
+EOF
+ else
+ print "unknown command: ", cmd, "\n"
+ end
+ rescue Net::IMAP::Error
+ puts $!
+ end
+ end
+ ensure
+ imap.logout
+ imap.disconnect
+ end
+end
+