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# frozen_string_literal: true
#
# = 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"
require "strscan"
require 'net/protocol'
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 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 mailbox
# from 1 up to the number of items in the mailbox. If a new
# message arrives during a session, it receives a sequence
# number equal to the new size of the mailbox. 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 thus cannot
# 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 exist; 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 your 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 < Protocol
VERSION = "0.2.1"
include MonitorMixin
if defined?(OpenSSL::SSL)
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
# Seconds to wait until a connection is opened.
# If the IMAP object cannot open a connection within this time,
# it raises a Net::OpenTimeout exception. The default value is 30 seconds.
attr_reader :open_timeout
# Seconds to wait until an IDLE response is received.
attr_reader :idle_response_timeout
# 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
# Returns the max number of flags interned to symbols.
def self.max_flag_count
return @@max_flag_count
end
# Sets the max number of flags interned to symbols.
def self.max_flag_count=(count)
@@max_flag_count = count
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,
# Net::IMAP::CramMD5Authenticator, and Net::IMAP::DigestMD5Authenticator
# 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
# Builds an authenticator for Net::IMAP#authenticate.
def self.authenticator(auth_type, *args)
auth_type = auth_type.upcase
unless @@authenticators.has_key?(auth_type)
raise ArgumentError,
format('unknown auth type - "%s"', auth_type)
end
@@authenticators[auth_type].new(*args)
end
# The default port for IMAP connections, port 143
def self.default_port
return PORT
end
# The default port for IMAPS connections, port 993
def self.default_tls_port
return SSL_PORT
end
class << self
alias default_imap_port default_port
alias default_imaps_port default_tls_port
alias default_ssl_port default_tls_port
end
# Disconnects from the server.
def disconnect
return if disconnected?
begin
begin
# try to call SSL::SSLSocket#io.
@sock.io.shutdown
rescue NoMethodError
# @sock is not an SSL::SSLSocket.
@sock.shutdown
end
rescue Errno::ENOTCONN
# ignore `Errno::ENOTCONN: Socket is not connected' on some platforms.
rescue Exception => e
@receiver_thread.raise(e)
end
@receiver_thread.join
synchronize do
@sock.close
end
raise e if e
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 an ID command, and returns a hash of the server's
# response, or nil if the server does not identify itself.
#
# Note that the user should first check if the server supports the ID
# capability. For example:
#
# capabilities = imap.capability
# if capabilities.include?("ID")
# id = imap.id(
# name: "my IMAP client (ruby)",
# version: MyIMAP::VERSION,
# "support-url": "mailto:bugs@example.com",
# os: RbConfig::CONFIG["host_os"],
# )
# end
#
# See RFC 2971, Section 3.3, for defined fields.
def id(client_id=nil)
synchronize do
send_command("ID", ClientID.new(client_id))
@responses.delete("ID")&.last
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 a STARTTLS command to start TLS session.
def starttls(options = {}, verify = true)
send_command("STARTTLS") do |resp|
if resp.kind_of?(TaggedResponse) && resp.name == "OK"
begin
# for backward compatibility
certs = options.to_str
options = create_ssl_params(certs, verify)
rescue NoMethodError
end
start_tls_session(options)
end
end
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 the 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 of these mechanisms, there should be two +args+: username
# and (cleartext) password. A server may not support one or the 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 +add_authenticator+ 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)
authenticator = self.class.authenticator(auth_type, *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("m0")
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 a NAMESPACE command [RFC2342] and returns the namespaces that are
# available. The NAMESPACE command allows a client to discover the prefixes
# of namespaces used by a server for personal mailboxes, other users'
# mailboxes, and shared mailboxes.
#
# This extension predates IMAP4rev1 (RFC3501), so most IMAP servers support
# it. Many popular IMAP servers are configured with the default personal
# namespaces as `("" "/")`: no prefix and "/" hierarchy delimiter. In that
# common case, the naive client may not have any trouble naming mailboxes.
#
# But many servers are configured with the default personal namespace as
# e.g. `("INBOX." ".")`, placing all personal folders under INBOX, with "."
# as the hierarchy delimiter. If the client does not check for this, but
# naively assumes it can use the same folder names for all servers, then
# folder creation (and listing, moving, etc) can lead to errors.
#
# From RFC2342:
#
# Although typically a server will support only a single Personal
# Namespace, and a single Other User's Namespace, circumstances exist
# where there MAY be multiples of these, and a client MUST be prepared
# for them. If a client is configured such that it is required to create
# a certain mailbox, there can be circumstances where it is unclear which
# Personal Namespaces it should create the mailbox in. In these
# situations a client SHOULD let the user select which namespaces to
# create the mailbox in.
#
# The user of this method should first check if the server supports the
# NAMESPACE capability. The return value is a +Net::IMAP::Namespaces+
# object which has +personal+, +other+, and +shared+ fields, each an array
# of +Net::IMAP::Namespace+ objects. These arrays will be empty when the
# server responds with nil.
#
# For example:
#
# capabilities = imap.capability
# if capabilities.include?("NAMESPACE")
# namespaces = imap.namespace
# if namespace = namespaces.personal.first
# prefix = namespace.prefix # e.g. "" or "INBOX."
# delim = namespace.delim # e.g. "/" or "."
# # personal folders should use the prefix and delimiter
# imap.create(prefix + "foo")
# imap.create(prefix + "bar")
# imap.create(prefix + %w[path to my folder].join(delim))
# end
# end
def namespace
synchronize do
send_command("NAMESPACE")
return @responses.delete("NAMESPACE")[-1]
end
end
# Sends a XLIST 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 XLIST command is like the LIST command except that the flags
# returned refer to the function of the folder/mailbox, e.g. :Sent
#
# The return value is an array of +Net::IMAP::MailboxList+. For example:
#
# imap.create("foo/bar")
# imap.create("foo/baz")
# p imap.xlist("", "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 xlist(refname, mailbox)
synchronize do
send_command("XLIST", refname, mailbox)
return @responses.delete("XLIST")
end
end
# Sends the GETQUOTAROOT command along with the specified +mailbox+.
# This command is generally available to both admin and user.
# If this mailbox exists, it returns an array containing objects of type
# 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 is generally 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 a 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 a 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 whose
# statuses are to be requested. 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 initially passed 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
# Similar to #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 a range between two numbers,
# or an array of those. The number is a message sequence number,
# where -1 represents a '*' for use in range notation like 100..-1
# being interpreted as '100:*'. Beware that the +exclude_end?+
# property of a Range object is ignored, and the contents of a
# range are independent of the order of the range endpoints as per
# the protocol specification, so 1...5, 5..1 and 5...1 are all
# equivalent to 1..5.
#
# +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 or nil
# (instead of an empty array) if there is no matching message.
#
# 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, mod = nil)
return fetch_internal("FETCH", set, attr, mod)
end
# Similar to #fetch(), but +set+ contains unique identifiers.
def uid_fetch(set, attr, mod = nil)
return fetch_internal("UID FETCH", set, attr, mod)
end
# Sends a STORE command to alter data associated with messages
# in the mailbox, in particular their flags. The +set+ parameter
# is a number, 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' will replace the message's flag list
# with the provided one, '+FLAGS' will add the provided flags,
# and '-FLAGS' will 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
# Similar to #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, 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
# Similar to #copy(), but +set+ contains unique identifiers.
def uid_copy(set, mailbox)
copy_internal("UID COPY", set, mailbox)
end
# Sends a MOVE command to move the specified message(s) to the end
# of the specified destination +mailbox+. The +set+ parameter is
# a number, an array of numbers, or a Range object. The number is
# a message sequence number.
# The IMAP MOVE extension is described in [RFC-6851].
def move(set, mailbox)
copy_internal("MOVE", set, mailbox)
end
# Similar to #move(), but +set+ contains unique identifiers.
def uid_move(set, mailbox)
copy_internal("UID MOVE", 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
# Similar to #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 a new EXISTS response (which normally
# indicates new messages being added to the mailbox),
# 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 = nil, &block)
raise ArgumentError, "two Procs are passed" if handler && block
@response_handlers.push(block || handler)
end
# Removes the response handler.
def remove_response_handler(handler)
@response_handlers.delete(handler)
end
# Similar to #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
# Similar to #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
# Sends an IDLE command that waits for notifications of new or expunged
# messages. Yields responses from the server during the IDLE.
#
# Use #idle_done() to leave IDLE.
#
# If +timeout+ is given, this method returns after +timeout+ seconds passed.
# +timeout+ can be used for keep-alive. For example, the following code
# checks the connection for each 60 seconds.
#
# loop do
# imap.idle(60) do |res|
# ...
# end
# end
def idle(timeout = nil, &response_handler)
raise LocalJumpError, "no block given" unless response_handler
response = nil
synchronize do
tag = Thread.current[:net_imap_tag] = generate_tag
put_string("#{tag} IDLE#{CRLF}")
begin
add_response_handler(&response_handler)
@idle_done_cond = new_cond
@idle_done_cond.wait(timeout)
@idle_done_cond = nil
if @receiver_thread_terminating
raise @exception || Net::IMAP::Error.new("connection closed")
end
ensure
unless @receiver_thread_terminating
remove_response_handler(response_handler)
put_string("DONE#{CRLF}")
response = get_tagged_response(tag, "IDLE", @idle_response_timeout)
end
end
end
return response
end
# Leaves IDLE.
def idle_done
synchronize do
if @idle_done_cond.nil?
raise Net::IMAP::Error, "not during IDLE"
end
@idle_done_cond.signal
end
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 UTF-7.
def self.decode_utf7(s)
return s.gsub(/&([^-]+)?-/n) {
if $1
($1.tr(",", "/") + "===").unpack1("m").encode(Encoding::UTF_8, Encoding::UTF_16BE)
else
"&"
end
}
end
# Encode a string from UTF-8 format to modified UTF-7.
def self.encode_utf7(s)
return s.gsub(/(&)|[^\x20-\x7e]+/) {
if $1
"&-"
else
base64 = [$&.encode(Encoding::UTF_16BE)].pack("m0")
"&" + base64.delete("=").tr("/", ",") + "-"
end
}.force_encoding("ASCII-8BIT")
end
# Formats +time+ as an IMAP-style date.
def self.format_date(time)
return time.strftime('%d-%b-%Y')
end
# Formats +time+ as an IMAP-style date-time.
def self.format_datetime(time)
return time.strftime('%d-%b-%Y %H:%M %z')
end
private
CRLF = "\r\n" # :nodoc:
PORT = 143 # :nodoc:
SSL_PORT = 993 # :nodoc:
@@debug = false
@@authenticators = {}
@@max_flag_count = 10000
# :call-seq:
# Net::IMAP.new(host, options = {})
#
# Creates a new Net::IMAP object and connects it to the specified
# +host+.
#
# +options+ is an option hash, each key of which is a symbol.
#
# The available options are:
#
# port:: Port number (default value is 143 for imap, or 993 for imaps)
# ssl:: If +options[:ssl]+ 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.
# If +options[:ssl]+ is a hash, it's passed to
# OpenSSL::SSL::SSLContext#set_params as parameters.
# open_timeout:: Seconds to wait until a connection is opened
# idle_response_timeout:: Seconds to wait until an IDLE response is received
#
# 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:: The connected to the host was successful, but
# it immediately said goodbye.
def initialize(host, port_or_options = {},
usessl = false, certs = nil, verify = true)
super()
@host = host
begin
options = port_or_options.to_hash
rescue NoMethodError
# for backward compatibility
options = {}
options[:port] = port_or_options
if usessl
options[:ssl] = create_ssl_params(certs, verify)
end
end
@port = options[:port] || (options[:ssl] ? SSL_PORT : PORT)
@tag_prefix = "RUBY"
@tagno = 0
@open_timeout = options[:open_timeout] || 30
@idle_response_timeout = options[:idle_response_timeout] || 5
@parser = ResponseParser.new
@sock = tcp_socket(@host, @port)
begin
if options[:ssl]
start_tls_session(options[:ssl])
@usessl = true
else
@usessl = false
end
@responses = Hash.new([].freeze)
@tagged_responses = {}
@response_handlers = []
@tagged_response_arrival = new_cond
@continued_command_tag = nil
@continuation_request_arrival = new_cond
@continuation_request_exception = nil
@idle_done_cond = nil
@logout_command_tag = nil
@debug_output_bol = true
@exception = nil
@greeting = get_response
if @greeting.nil?
raise Error, "connection closed"
end
if @greeting.name == "BYE"
raise ByeResponseError, @greeting
end
@client_thread = Thread.current
@receiver_thread = Thread.start {
begin
receive_responses
rescue Exception
end
}
@receiver_thread_terminating = false
rescue Exception
@sock.close
raise
end
end
def tcp_socket(host, port)
s = Socket.tcp(host, port, :connect_timeout => @open_timeout)
s.setsockopt(:SOL_SOCKET, :SO_KEEPALIVE, true)
s
rescue Errno::ETIMEDOUT
raise Net::OpenTimeout, "Timeout to open TCP connection to " +
"#{host}:#{port} (exceeds #{@open_timeout} seconds)"
end
def receive_responses
connection_closed = false
until connection_closed
synchronize do
@exception = nil
end
begin
resp = get_response
rescue Exception => e
synchronize do
@sock.close
@exception = e
end
break
end
unless resp
synchronize do
@exception = EOFError.new("end of file reached")
end
break
end
begin
synchronize do
case resp
when TaggedResponse
@tagged_responses[resp.tag] = resp
@tagged_response_arrival.broadcast
case resp.tag
when @logout_command_tag
return
when @continued_command_tag
@continuation_request_exception =
RESPONSE_ERRORS[resp.name].new(resp)
@continuation_request_arrival.signal
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
@exception = ByeResponseError.new(resp)
connection_closed = true
end
when ContinuationRequest
@continuation_request_arrival.signal
end
@response_handlers.each do |handler|
handler.call(resp)
end
end
rescue Exception => e
@exception = e
synchronize do
@tagged_response_arrival.broadcast
@continuation_request_arrival.broadcast
end
end
end
synchronize do
@receiver_thread_terminating = true
@tagged_response_arrival.broadcast
@continuation_request_arrival.broadcast
if @idle_done_cond
@idle_done_cond.signal
end
end
end
def get_tagged_response(tag, cmd, timeout = nil)
if timeout
deadline = Time.now + timeout
end
until @tagged_responses.key?(tag)
raise @exception if @exception
if timeout
timeout = deadline - Time.now
if timeout <= 0
return nil
end
end
@tagged_response_arrival.wait(timeout)
end
resp = @tagged_responses.delete(tag)
case resp.name
when /\A(?:NO)\z/ni
raise NoResponseError, resp
when /\A(?:BAD)\z/ni
raise BadResponseError, resp
else
return resp
end
end
def get_response
buff = String.new
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
args.each do |i|
validate_data(i)
end
tag = generate_tag
put_string(tag + " " + cmd)
args.each do |i|
put_string(" ")
send_data(i, tag)
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 validate_data(data)
case data
when nil
when String
when Integer
NumValidator.ensure_number(data)
when Array
if data[0] == 'CHANGEDSINCE'
NumValidator.ensure_mod_sequence_value(data[1])
else
data.each do |i|
validate_data(i)
end
end
when Time
when Symbol
else
data.validate
end
end
def send_data(data, tag = nil)
case data
when nil
put_string("NIL")
when String
send_string_data(data, tag)
when Integer
send_number_data(data)
when Array
send_list_data(data, tag)
when Time
send_time_data(data)
when Symbol
send_symbol_data(data)
else
data.send_data(self, tag)
end
end
def send_string_data(str, tag = nil)
case str
when ""
put_string('""')
when /[\x80-\xff\r\n]/n
# literal
send_literal(str, tag)
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, tag = nil)
synchronize do
put_string("{" + str.bytesize.to_s + "}" + CRLF)
@continued_command_tag = tag
@continuation_request_exception = nil
begin
@continuation_request_arrival.wait
e = @continuation_request_exception || @exception
raise e if e
put_string(str)
ensure
@continued_command_tag = nil
@continuation_request_exception = nil
end
end
end
def send_number_data(num)
put_string(num.to_s)
end
def send_list_data(list, tag = nil)
put_string("(")
first = true
list.each do |i|
if first
first = false
else
put_string(" ")
end
send_data(i, tag)
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, mod = nil)
case attr
when String then
attr = RawData.new(attr)
when Array then
attr = attr.map { |arg|
arg.is_a?(String) ? RawData.new(arg) : arg
}
end
synchronize do
@responses.delete("FETCH")
if mod
send_command(cmd, MessageSet.new(set), attr, mod)
else
send_command(cmd, MessageSet.new(set), attr)
end
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
def create_ssl_params(certs = nil, verify = true)
params = {}
if certs
if File.file?(certs)
params[:ca_file] = certs
elsif File.directory?(certs)
params[:ca_path] = certs
end
end
if verify
params[:verify_mode] = VERIFY_PEER
else
params[:verify_mode] = VERIFY_NONE
end
return params
end
def start_tls_session(params = {})
unless defined?(OpenSSL::SSL)
raise "SSL extension not installed"
end
if @sock.kind_of?(OpenSSL::SSL::SSLSocket)
raise RuntimeError, "already using SSL"
end
begin
params = params.to_hash
rescue NoMethodError
params = {}
end
context = SSLContext.new
context.set_params(params)
if defined?(VerifyCallbackProc)
context.verify_callback = VerifyCallbackProc
end
@sock = SSLSocket.new(@sock, context)
@sock.sync_close = true
@sock.hostname = @host if @sock.respond_to? :hostname=
ssl_socket_connect(@sock, @open_timeout)
if context.verify_mode != VERIFY_NONE
@sock.post_connection_check(@host)
end
end
class RawData # :nodoc:
def send_data(imap, tag)
imap.__send__(:put_string, @data)
end
def validate
end
private
def initialize(data)
@data = data
end
end
class Atom # :nodoc:
def send_data(imap, tag)
imap.__send__(:put_string, @data)
end
def validate
end
private
def initialize(data)
@data = data
end
end
class QuotedString # :nodoc:
def send_data(imap, tag)
imap.__send__(:send_quoted_string, @data)
end
def validate
end
private
def initialize(data)
@data = data
end
end
class Literal # :nodoc:
def send_data(imap, tag)
imap.__send__(:send_literal, @data, tag)
end
def validate
end
private
def initialize(data)
@data = data
end
end
class MessageSet # :nodoc:
def send_data(imap, tag)
imap.__send__(:put_string, format_internal(@data))
end
def validate
validate_internal(@data)
end
private
def initialize(data)
@data = data
end
def format_internal(data)
case data
when "*"
return data
when Integer
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(",")}
end
end
def validate_internal(data)
case data
when "*"
when Integer
NumValidator.ensure_nz_number(data)
when Range
when Array
data.each do |i|
validate_internal(i)
end
when ThreadMember
data.children.each do |i|
validate_internal(i)
end
else
raise DataFormatError, data.inspect
end
end
end
class ClientID # :nodoc:
def send_data(imap, tag)
imap.__send__(:send_data, format_internal(@data), tag)
end
def validate
validate_internal(@data)
end
private
def initialize(data)
@data = data
end
def validate_internal(client_id)
client_id.to_h.each do |k,v|
unless StringFormatter.valid_string?(k)
raise DataFormatError, client_id.inspect
end
end
rescue NoMethodError, TypeError # to_h failed
raise DataFormatError, client_id.inspect
end
def format_internal(client_id)
return nil if client_id.nil?
client_id.to_h.flat_map {|k,v|
[StringFormatter.string(k), StringFormatter.nstring(v)]
}
end
end
module StringFormatter
LITERAL_REGEX = /[\x80-\xff\r\n]/n
module_function
# Allows symbols in addition to strings
def valid_string?(str)
str.is_a?(Symbol) || str.respond_to?(:to_str)
end
# Allows nil, symbols, and strings
def valid_nstring?(str)
str.nil? || valid_string?(str)
end
# coerces using +to_s+
def string(str)
str = str.to_s
if str =~ LITERAL_REGEX
Literal.new(str)
else
QuotedString.new(str)
end
end
# coerces non-nil using +to_s+
def nstring(str)
str.nil? ? nil : string(str)
end
end
# Common validators of number and nz_number types
module NumValidator # :nodoc
class << self
# Check is passed argument valid 'number' in RFC 3501 terminology
def valid_number?(num)
# [RFC 3501]
# number = 1*DIGIT
# ; Unsigned 32-bit integer
# ; (0 <= n < 4,294,967,296)
num >= 0 && num < 4294967296
end
# Check is passed argument valid 'nz_number' in RFC 3501 terminology
def valid_nz_number?(num)
# [RFC 3501]
# nz-number = digit-nz *DIGIT
# ; Non-zero unsigned 32-bit integer
# ; (0 < n < 4,294,967,296)
num != 0 && valid_number?(num)
end
# Check is passed argument valid 'mod_sequence_value' in RFC 4551 terminology
def valid_mod_sequence_value?(num)
# mod-sequence-value = 1*DIGIT
# ; Positive unsigned 64-bit integer
# ; (mod-sequence)
# ; (1 <= n < 18,446,744,073,709,551,615)
num >= 1 && num < 18446744073709551615
end
# Ensure argument is 'number' or raise DataFormatError
def ensure_number(num)
return if valid_number?(num)
msg = "number must be unsigned 32-bit integer: #{num}"
raise DataFormatError, msg
end
# Ensure argument is 'nz_number' or raise DataFormatError
def ensure_nz_number(num)
return if valid_nz_number?(num)
msg = "nz_number must be non-zero unsigned 32-bit integer: #{num}"
raise DataFormatError, msg
end
# Ensure argument is 'mod_sequence_value' or raise DataFormatError
def ensure_mod_sequence_value(num)
return if valid_mod_sequence_value?(num)
msg = "mod_sequence_value must be unsigned 64-bit integer: #{num}"
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", or "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::IgnoredResponse represents intentionaly ignored responses.
#
# This includes untagged response "NOOP" sent by eg. Zimbra to avoid some
# clients to close the connection.
#
# It matches no IMAP standard.
#
# ==== Fields:
#
# raw_data:: Returns the raw data string.
IgnoredResponse = Struct.new(: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, one of "OK", "NO", or "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 "]" SP] text
#
# ==== 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" /
# "BADCHARSET" [SP "(" astring *(SP astring) ")" ] /
# capability_data / "PARSE" /
# "PERMANENTFLAGS" SP "("
# [flag_perm *(SP flag_perm)] ")" /
# "READ-ONLY" / "READ-WRITE" / "TRYCREATE" /
# "UIDNEXT" SP nz_number / "UIDVALIDITY" SP nz_number /
# "UNSEEN" SP nz_number /
# atom [SP 1*<any TEXT-CHAR except "]">]
#
# ==== Fields:
#
# name:: Returns the name, such as "ALERT", "PERMANENTFLAGS", or "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 the mailbox.
#
# quota:: Quota limit imposed on the 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 affect the quota on the
# specified mailbox.
#
MailboxQuotaRoot = Struct.new(:mailbox, :quotaroots)
# Net::IMAP::MailboxACLItem represents the 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, :mailbox)
# Net::IMAP::Namespace represents a single [RFC-2342] namespace.
#
# Namespace = nil / "(" 1*( "(" string SP (<"> QUOTED_CHAR <"> /
# nil) *(Namespace_Response_Extension) ")" ) ")"
#
# Namespace_Response_Extension = SP string SP "(" string *(SP string)
# ")"
#
# ==== Fields:
#
# prefix:: Returns the namespace prefix string.
# delim:: Returns nil or the hierarchy delimiter character.
# extensions:: Returns a hash of extension names to extension flag arrays.
#
Namespace = Struct.new(:prefix, :delim, :extensions)
# Net::IMAP::Namespaces represents the response from [RFC-2342] NAMESPACE.
#
# Namespace_Response = "*" SP "NAMESPACE" SP Namespace SP Namespace SP
# Namespace
#
# ; The first Namespace is the Personal Namespace(s)
# ; The second Namespace is the Other Users' Namespace(s)
# ; The third Namespace is the Shared Namespace(s)
#
# ==== Fields:
#
# personal:: Returns an array of Personal Net::IMAP::Namespace objects.
# other:: Returns an array of Other Users' Net::IMAP::Namespace objects.
# shared:: Returns an array of Shared Net::IMAP::Namespace objects.
#
Namespaces = Struct.new(:personal, :other, :shared)
# Net::IMAP::StatusData represents the 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 the 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
warn("media_subtype is obsolete, use subtype instead.\n", uplevel: 1)
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
warn("media_subtype is obsolete, use subtype instead.\n", uplevel: 1)
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
warn("media_subtype is obsolete, use subtype instead.\n", uplevel: 1)
return subtype
end
end
# Net::IMAP::BodyTypeAttachment represents attachment body structures
# of messages.
#
# ==== Fields:
#
# media_type:: Returns the content media type name.
#
# subtype:: Returns +nil+.
#
# param:: Returns a hash that represents parameters.
#
# multipart?:: Returns false.
#
class BodyTypeAttachment < Struct.new(:media_type, :subtype,
:param)
def multipart?
return false
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
warn("media_subtype is obsolete, use subtype instead.\n", uplevel: 1)
return subtype
end
end
class BodyTypeExtension < Struct.new(:media_type, :subtype,
:params, :content_id,
:description, :encoding, :size)
def multipart?
return false
end
end
class ResponseParser # :nodoc:
def initialize
@str = nil
@pos = nil
@lex_state = nil
@token = nil
@flag_symbols = {}
end
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
while lookahead.symbol == T_SPACE
# Ignore trailing space for Microsoft Exchange Server
shift_token
end
match(T_CRLF)
match(T_EOF)
return result
end
def continue_req
match(T_PLUS)
token = lookahead
if token.symbol == T_SPACE
shift_token
return ContinuationRequest.new(resp_text, @str)
else
return ContinuationRequest.new(ResponseText.new(nil, ""), @str)
end
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(?:ID)\z/ni
return id_response
when /\A(?:LIST|LSUB|XLIST)\z/ni
return list_response
when /\A(?:NAMESPACE)\z/ni
return namespace_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
when /\A(?:NOOP)\z/ni
return ignored_response
else
return text_response
end
else
parse_error("unexpected token %s", token.symbol)
end
end
def response_tagged
tag = astring_chars
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(n))
return UntaggedResponse.new(name, data, @str)
end
end
def msg_att(n)
match(T_LPAR)
attr = {}
while true
token = lookahead
case token.symbol
when T_RPAR
shift_token
break
when T_SPACE
shift_token
next
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
when /\A(?:MODSEQ)\z/ni
name, val = modseq_data
else
parse_error("unknown attribute `%s' for {%d}", token.value, n)
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
token = lookahead
if token.symbol == T_LBRA
shift_token
match(T_RBRA)
end
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
when /\A(?:ATTACHMENT)\z/ni
return body_type_attachment
when /\A(?:MIXED)\z/ni
return body_type_mixed
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
token = lookahead
if token.symbol == T_RPAR
# If this is not message/rfc822, we shouldn't apply the RFC822
# spec to it. We should handle anything other than
# message/rfc822 using multipart extension data [rfc3501] (i.e.
# the data itself won't be returned, we would have to retrieve it
# with BODYSTRUCTURE instead of with BODY
# Also, sometimes a message/rfc822 is included as a large
# attachment instead of having all of the other details
# (e.g. attaching a .eml file to an email)
if msubtype == "RFC822"
return BodyTypeMessage.new(mtype, msubtype, param, content_id,
desc, enc, size, nil, nil, nil, nil,
nil, nil, nil)
else
return BodyTypeExtension.new(mtype, msubtype,
param, content_id,
desc, enc, size)
end
end
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_attachment
mtype = case_insensitive_string
match(T_SPACE)
param = body_fld_param
return BodyTypeAttachment.new(mtype, nil, param)
end
def body_type_mixed
mtype = "MULTIPART"
msubtype = case_insensitive_string
param, disposition, language, extension = body_ext_mpart
return BodyTypeBasic.new(mtype, msubtype, param, nil, nil, nil, nil, nil, 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
token = lookahead
if token.symbol != T_SPACE
return mtype, nil
end
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
token = lookahead
if token.symbol == T_SPACE
shift_token
else
return param, disposition
end
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 = String.new
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.bytesize.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 modseq_data
token = match(T_ATOM)
name = token.value.upcase
match(T_SPACE)
match(T_LPAR)
modseq = number
match(T_RPAR)
return name, modseq
end
def ignored_response
while lookahead.symbol != T_CRLF
shift_token
end
return IgnoredResponse.new(@str)
end
def text_response
token = match(T_ATOM)
name = token.value.upcase
match(T_SPACE)
return UntaggedResponse.new(name, text)
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
data.push(MailboxACLItem.new(user, rights, mailbox))
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
when T_NUMBER
data.push(number)
when T_LPAR
# TODO: include the MODSEQ value in a response
shift_token
match(T_ATOM)
match(T_SPACE)
match(T_NUMBER)
match(T_RPAR)
end
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)
UntaggedResponse.new(name, capability_data, @str)
end
def capability_data
data = []
while true
token = lookahead
case token.symbol
when T_CRLF, T_RBRA
break
when T_SPACE
shift_token
next
end
data.push(atom.upcase)
end
data
end
def id_response
token = match(T_ATOM)
name = token.value.upcase
match(T_SPACE)
token = match(T_LPAR, T_NIL)
if token.symbol == T_NIL
return UntaggedResponse.new(name, nil, @str)
else
data = {}
while true
token = lookahead
case token.symbol
when T_RPAR
shift_token
break
when T_SPACE
shift_token
next
else
key = string
match(T_SPACE)
val = nstring
data[key] = val
end
end
return UntaggedResponse.new(name, data, @str)
end
end
def namespace_response
@lex_state = EXPR_DATA
token = lookahead
token = match(T_ATOM)
name = token.value.upcase
match(T_SPACE)
personal = namespaces
match(T_SPACE)
other = namespaces
match(T_SPACE)
shared = namespaces
@lex_state = EXPR_BEG
data = Namespaces.new(personal, other, shared)
return UntaggedResponse.new(name, data, @str)
end
def namespaces
token = lookahead
# empty () is not allowed, so nil is functionally identical to empty.
data = []
if token.symbol == T_NIL
shift_token
else
match(T_LPAR)
loop do
data << namespace
break unless lookahead.symbol == T_SPACE
shift_token
end
match(T_RPAR)
end
data
end
def namespace
match(T_LPAR)
prefix = match(T_QUOTED, T_LITERAL).value
match(T_SPACE)
delimiter = string
extensions = namespace_response_extensions
match(T_RPAR)
Namespace.new(prefix, delimiter, extensions)
end
def namespace_response_extensions
data = {}
token = lookahead
if token.symbol == T_SPACE
shift_token
name = match(T_QUOTED, T_LITERAL).value
data[name] ||= []
match(T_SPACE)
match(T_LPAR)
loop do
data[name].push match(T_QUOTED, T_LITERAL).value
break unless lookahead.symbol == T_SPACE
shift_token
end
match(T_RPAR)
end
data
end
# text = 1*TEXT-CHAR
# TEXT-CHAR = <any CHAR except CR and LF>
def text
match(T_TEXT, lex_state: EXPR_TEXT).value
end
# resp-text = ["[" resp-text-code "]" SP] text
def resp_text
token = match(T_LBRA, T_TEXT, lex_state: EXPR_RTEXT)
case token.symbol
when T_LBRA
code = resp_text_code
match(T_RBRA)
accept_space # violating RFC
ResponseText.new(code, text)
when T_TEXT
ResponseText.new(nil, token.value)
end
end
# See https://www.rfc-editor.org/errata/rfc3501
#
# resp-text-code = "ALERT" /
# "BADCHARSET" [SP "(" charset *(SP charset) ")" ] /
# capability-data / "PARSE" /
# "PERMANENTFLAGS" SP "("
# [flag-perm *(SP flag-perm)] ")" /
# "READ-ONLY" / "READ-WRITE" / "TRYCREATE" /
# "UIDNEXT" SP nz-number / "UIDVALIDITY" SP nz-number /
# "UNSEEN" SP nz-number /
# atom [SP 1*<any TEXT-CHAR except "]">]
def resp_text_code
token = match(T_ATOM)
name = token.value.upcase
case name
when /\A(?:ALERT|PARSE|READ-ONLY|READ-WRITE|TRYCREATE|NOMODSEQ)\z/n
result = ResponseCode.new(name, nil)
when /\A(?:BADCHARSET)\z/n
result = ResponseCode.new(name, charset_list)
when /\A(?:CAPABILITY)\z/ni
result = ResponseCode.new(name, capability_data)
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
token = lookahead
if token.symbol == T_SPACE
shift_token
token = match(T_TEXT, lex_state: EXPR_CTEXT)
result = ResponseCode.new(name, token.value)
else
result = ResponseCode.new(name, nil)
end
end
return result
end
def charset_list
result = []
if accept(T_SPACE)
match(T_LPAR)
result << charset
while accept(T_SPACE)
result << charset
end
match(T_RPAR)
end
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
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|
if atom
atom
else
symbol = flag.capitalize.intern
@flag_symbols[symbol] = true
if @flag_symbols.length > IMAP.max_flag_count
raise FlagCountError, "number of flag symbols exceeded"
end
symbol
end
}
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 astring_chars
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
# atom = 1*ATOM-CHAR
# ATOM-CHAR = <any CHAR except atom-specials>
ATOM_TOKENS = [
T_ATOM,
T_NUMBER,
T_NIL,
T_LBRA,
T_PLUS
]
def atom
-combine_adjacent(*ATOM_TOKENS)
end
# ASTRING-CHAR = ATOM-CHAR / resp-specials
# resp-specials = "]"
ASTRING_CHARS_TOKENS = [*ATOM_TOKENS, T_RBRA]
def astring_chars
combine_adjacent(*ASTRING_CHARS_TOKENS)
end
def combine_adjacent(*tokens)
result = "".b
while token = accept(*tokens)
result << token.value
end
if result.empty?
parse_error('unexpected token %s (expected %s)',
lookahead.symbol, args.join(" or "))
end
result
end
# See https://www.rfc-editor.org/errata/rfc3501
#
# charset = atom / quoted
def charset
if token = accept(T_QUOTED)
token.value
else
atom
end
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
SPACES_REGEXP = /\G */n
# This advances @pos directly so it's safe before changing @lex_state.
def accept_space
if @token
shift_token if @token.symbol == T_SPACE
elsif @str[@pos] == " "
@pos += 1
end
end
# The RFC is very strict about this and usually we should be too.
# But skipping spaces is usually a safe workaround for buggy servers.
#
# This advances @pos directly so it's safe before changing @lex_state.
def accept_spaces
shift_token if @token&.symbol == T_SPACE
if @str.index(SPACES_REGEXP, @pos)
@pos = $~.end(0)
end
end
def match(*args, lex_state: @lex_state)
if @token && lex_state != @lex_state
parse_error("invalid lex_state change to %s with unconsumed token",
lex_state)
end
begin
@lex_state, original_lex_state = lex_state, @lex_state
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
ensure
@lex_state = original_lex_state
end
end
# like match, but does not raise error on failure.
#
# returns and shifts token on successful match
# returns nil and leaves @token unshifted on no match
def accept(*args)
token = lookahead
if args.include?(token.symbol)
shift_token
token
end
end
def lookahead
@token ||= next_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] DATA_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("invalid @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
$stderr.printf("@token.symbol: %s\n", @token.symbol)
$stderr.printf("@token.value: %s\n", @token.value.inspect)
end
end
raise ResponseParseError, format(fmt, *args)
end
end
# Authenticator for the "LOGIN" authentication type. See
# #authenticate().
class LoginAuthenticator
def process(data)
case @state
when STATE_USER
@state = STATE_PASSWORD
return @user
when STATE_PASSWORD
return @password
end
end
private
STATE_USER = :USER
STATE_PASSWORD = :PASSWORD
def initialize(user, password)
@user = user
@password = password
@state = STATE_USER
end
end
add_authenticator "LOGIN", LoginAuthenticator
# Authenticator for the "PLAIN" authentication type. See
# #authenticate().
class PlainAuthenticator
def process(data)
return "\0#{@user}\0#{@password}"
end
private
def initialize(user, password)
@user = user
@password = password
end
end
add_authenticator "PLAIN", PlainAuthenticator
# Authenticator for the "CRAM-MD5" authentication type. See
# #authenticate().
class CramMD5Authenticator
def process(challenge)
digest = hmac_md5(challenge, @password)
return @user + " " + digest
end
private
def initialize(user, password)
@user = user
@password = password
end
def hmac_md5(text, key)
if key.length > 64
key = Digest::MD5.digest(key)
end
k_ipad = key + "\0" * (64 - key.length)
k_opad = key + "\0" * (64 - key.length)
for i in 0..63
k_ipad[i] = (k_ipad[i].ord ^ 0x36).chr
k_opad[i] = (k_opad[i].ord ^ 0x5c).chr
end
digest = Digest::MD5.digest(k_ipad + text)
return Digest::MD5.hexdigest(k_opad + digest)
end
end
add_authenticator "CRAM-MD5", CramMD5Authenticator
# Authenticator for the "DIGEST-MD5" authentication type. See
# #authenticate().
class DigestMD5Authenticator
def process(challenge)
case @stage
when STAGE_ONE
@stage = STAGE_TWO
sparams = {}
c = StringScanner.new(challenge)
while c.scan(/(?:\s*,)?\s*(\w+)=("(?:[^\\"]+|\\.)*"|[^,]+)\s*/)
k, v = c[1], c[2]
if v =~ /^"(.*)"$/
v = $1
if v =~ /,/
v = v.split(',')
end
end
sparams[k] = v
end
raise DataFormatError, "Bad Challenge: '#{challenge}'" unless c.rest.size == 0
raise Error, "Server does not support auth (qop = #{sparams['qop'].join(',')})" unless sparams['qop'].include?("auth")
response = {
:nonce => sparams['nonce'],
:username => @user,
:realm => sparams['realm'],
:cnonce => Digest::MD5.hexdigest("%.15f:%.15f:%d" % [Time.now.to_f, rand, Process.pid.to_s]),
:'digest-uri' => 'imap/' + sparams['realm'],
:qop => 'auth',
:maxbuf => 65535,
:nc => "%08d" % nc(sparams['nonce']),
:charset => sparams['charset'],
}
response[:authzid] = @authname unless @authname.nil?
# now, the real thing
a0 = Digest::MD5.digest( [ response.values_at(:username, :realm), @password ].join(':') )
a1 = [ a0, response.values_at(:nonce,:cnonce) ].join(':')
a1 << ':' + response[:authzid] unless response[:authzid].nil?
a2 = "AUTHENTICATE:" + response[:'digest-uri']
a2 << ":00000000000000000000000000000000" if response[:qop] and response[:qop] =~ /^auth-(?:conf|int)$/
response[:response] = Digest::MD5.hexdigest(
[
Digest::MD5.hexdigest(a1),
response.values_at(:nonce, :nc, :cnonce, :qop),
Digest::MD5.hexdigest(a2)
].join(':')
)
return response.keys.map {|key| qdval(key.to_s, response[key]) }.join(',')
when STAGE_TWO
@stage = nil
# if at the second stage, return an empty string
if challenge =~ /rspauth=/
return ''
else
raise ResponseParseError, challenge
end
else
raise ResponseParseError, challenge
end
end
def initialize(user, password, authname = nil)
@user, @password, @authname = user, password, authname
@nc, @stage = {}, STAGE_ONE
end
private
STAGE_ONE = :stage_one
STAGE_TWO = :stage_two
def nc(nonce)
if @nc.has_key? nonce
@nc[nonce] = @nc[nonce] + 1
else
@nc[nonce] = 1
end
return @nc[nonce]
end
# some responses need quoting
def qdval(k, v)
return if k.nil? or v.nil?
if %w"username authzid realm nonce cnonce digest-uri qop".include? k
v.gsub!(/([\\"])/, "\\\1")
return '%s="%s"' % [k, v]
else
return '%s=%s' % [k, v]
end
end
end
add_authenticator "DIGEST-MD5", DigestMD5Authenticator
# 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
# The response that caused this error
attr_accessor :response
def initialize(response)
@response = response
super @response.data.text
end
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
RESPONSE_ERRORS = Hash.new(ResponseError)
RESPONSE_ERRORS["NO"] = NoResponseError
RESPONSE_ERRORS["BAD"] = BadResponseError
# Error raised when too many flags are interned to symbols.
class FlagCountError < Error
end
end
end
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