File: imap4.n

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'\"
'\" Generated from file 'imap4\&.man' by tcllib/doctools with format 'nroff'
'\"
.TH "imap4" n 0\&.5\&.5 tcllib "imap client"
.\" The -*- nroff -*- definitions below are for supplemental macros used
.\" in Tcl/Tk manual entries.
.\"
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.\"	needed;  use .AS below instead)
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Command-Line Name:	\\fB\\$1\\fR
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.IP
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.\"	# MT - "empty" string
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.QW ""
..
.BS
.SH NAME
imap4 \- imap client-side tcl implementation of imap protocol
.SH SYNOPSIS
package require \fBTcl 8\&.5 9\fR
.sp
package require \fBimap4 ?0\&.5\&.5?\fR
.sp
\fB::imap4::open\fR \fIhostname\fR ?\fIport\fR?
.sp
\fB::imap4::starttls\fR \fIchan\fR
.sp
\fB::imap4::login\fR \fIchan\fR \fIuser\fR \fIpass\fR
.sp
\fB::imap4::folders\fR \fIchan\fR ?\fI-inline\fR? ?\fImboxref\fR? ?\fImboxname\fR?
.sp
\fB::imap4::select\fR \fIchan\fR ?\fImailbox\fR?
.sp
\fB::imap4::examine\fR \fIchan\fR ?\fImailbox\fR?
.sp
\fB::imap4::fetch\fR \fIchan\fR \fIrange\fR ?\fI-inline\fR? ?\fIattr \&.\&.\&.\fR?
.sp
\fB::imap4::noop\fR \fIchan\fR
.sp
\fB::imap4::check\fR \fIchan\fR
.sp
\fB::imap4::folderinfo\fR \fIchan\fR ?\fIinfo\fR?
.sp
\fB::imap4::msginfo\fR \fIchan\fR \fImsgid\fR ?\fIinfo\fR? ?\fIdefval\fR?
.sp
\fB::imap4::mboxinfo\fR \fIchan\fR ?\fIinfo\fR?
.sp
\fB::imap4::isableto\fR \fIchan\fR ?\fIcapability\fR?
.sp
\fB::imap4::create\fR \fIchan\fR \fImailbox\fR
.sp
\fB::imap4::delete\fR \fIchan\fR \fImailbox\fR
.sp
\fB::imap4::rename\fR \fIchan\fR \fIoldname\fR \fInewname\fR
.sp
\fB::imap4::subscribe\fR \fIchan\fR \fImailbox\fR
.sp
\fB::imap4::unsubscribe\fR \fIchan\fR \fImailbox\fR
.sp
\fB::imap4::search\fR \fIchan\fR \fIexpr\fR ?\fI\&.\&.\&.\fR?
.sp
\fB::imap4::close\fR \fIchan\fR
.sp
\fB::imap4::cleanup\fR \fIchan\fR
.sp
\fB::imap4::debugmode\fR \fIchan\fR ?\fIerrormsg\fR?
.sp
\fB::imap4::store\fR \fIchan\fR \fIrange\fR \fIdata\fR \fIflaglist\fR
.sp
\fB::imap4::expunge\fR \fIchan\fR
.sp
\fB::imap4::copy\fR \fIchan\fR \fImsgid\fR \fImailbox\fR
.sp
\fB::imap4::logout\fR \fIchan\fR
.sp
.BE
.SH DESCRIPTION
The \fBimap4\fR library package provides the client side of the
\fIInternet Message Access Protocol\fR (IMAP) using standard
sockets or secure connection via TLS/SSL\&.
The package is fully implemented in Tcl\&.
.PP
This document describes the procedures and explains their usage\&.
.SH PROCEDURES
This package defines the following public procedures:
.TP
\fB::imap4::open\fR \fIhostname\fR ?\fIport\fR?
.sp
Open a new IMAP connection and initalize the handler,
the imap communication channel (handler) is returned\&.
.sp
\fIhostname\fR - mail server
.sp
\fIport\fR - connection port, defaults to 143
.sp
The namespace variable \fB::imap4::use_ssl\fR
can be used to establish to a secure connection
via TSL/SSL if set to true\&. In this case default connection port
defaults to 993\&.
.sp
\fINote:\fR
For connecting via SSL the Tcl module \fItls\fR must be already
loaded otherwise an error is raised\&.
.CS


    package require tls              ; # must be loaded for TLS/SSL
    set ::imap4::use_ssl 1           ; # request a secure connection
    set chan [::imap4::open $server] ; # default port is now 993
.CE
.TP
\fB::imap4::starttls\fR \fIchan\fR
Use this when tasked with connecting to an unsecure port which must be
changed to a secure port prior to user login\&.  This feature is known
as \fISTARTTLS\fR\&.
.TP
\fB::imap4::login\fR \fIchan\fR \fIuser\fR \fIpass\fR
.sp
Login using the IMAP LOGIN command, 0 is returned on successful login\&.
.sp
\fIchan\fR - imap channel
.sp
\fIuser\fR - username
.sp
\fIpass\fR - password
.TP
\fB::imap4::folders\fR \fIchan\fR ?\fI-inline\fR? ?\fImboxref\fR? ?\fImboxname\fR?
.sp
Get list of matching folders, 0 is returned on success\&.
.sp
Wildcards '*' as '%' are allowed for \fImboxref\fR and \fImboxname\fR,
command \fB::imap4::folderinfo\fR can be used to retrieve folder information\&.
.sp
\fIchan\fR - imap channel
.sp
\fImboxref\fR - mailbox reference, defaults to ""
.sp
\fImboxname\fR - mailbox name, defaults to "*"
.sp
If \fB-inline\fR is specified a compact folderlist is
returned instead of the result code\&. All flags are converted to
lowercase and leading special characters are removed\&.
.CS

{{Arc08 noselect} {Arc08/Private {noinferiors unmarked}} {INBOX noinferiors}}
.CE
.TP
\fB::imap4::select\fR \fIchan\fR ?\fImailbox\fR?
.sp
Select a mailbox, 0 is returned on success\&.
.sp
\fIchan\fR - imap channel
.sp
\fImailbox\fR - Path of the mailbox,  defaults to \fIINBOX\fR
.sp
Prior to examine/select an open mailbox must be closed - see: \fB::imap4::close\fR\&.
.TP
\fB::imap4::examine\fR \fIchan\fR ?\fImailbox\fR?
.sp
"Examines" a mailbox, read-only equivalent of \fB::imap4::select\fR\&.
.sp
\fIchan\fR - imap channel
.sp
\fImailbox\fR - mailbox name or path to mailbox,
defaults to \fIINBOX\fR
.sp
Prior to examine/select an open mailbox must be closed - see: \fB::imap4::close\fR\&.
.TP
\fB::imap4::fetch\fR \fIchan\fR \fIrange\fR ?\fI-inline\fR? ?\fIattr \&.\&.\&.\fR?
.sp
Fetch attributes from messages\&.
.sp
The attributes are fetched and stored in the internal state
which can be retrieved with command \fB::imap4::msginfo\fR, 0 is returned
on success\&.
If \fB-inline\fR is specified, alle records are returned as list
in order as defined in the \fIattr\fR argument\&.
.sp
\fIchan\fR - imap channel
.sp
\fIrange\fR - message index in format \fIFROM\fR:\fITO\fR
.sp
\fIattr\fR - imap attributes to fetch
.sp
\fINote:\fR
If \fIFROM\fR is omitted, the 1st message is assumed,
if \fITO\fR is ommitted the last message is assumed\&.
All message index ranges are 1-based\&.
.TP
\fB::imap4::noop\fR \fIchan\fR
Send NOOP command to server\&. May get information as untagged data\&.
.sp
\fIchan\fR - imap channel
.TP
\fB::imap4::check\fR \fIchan\fR
Send CHECK command to server\&. Flush to disk\&.
.sp
\fIchan\fR - imap channel
.TP
\fB::imap4::folderinfo\fR \fIchan\fR ?\fIinfo\fR?
.sp
Get information on the recently selected folderlist\&.
If the \fIinfo\fR argument is omitted or a null string, the full list
of information available for the mailbox is returned\&.
.sp
If the required information name is suffixed with a ? character,
the command returns true if the information is available, or
false if it is not\&.
.sp
\fIchan\fR - imap channel
.sp
\fIinfo\fR - folderlist options to retrieve
.sp
Currently supported options:
\fIdelim\fR - hierarchy delimiter only,
\fImatch\fR - ref and mbox search patterns (see \fB::imap4::folders\fR),
\fInames\fR - list of folder names only,
\fIflags\fR - list of folder names with flags in format
\fI{ {name {flags}} \&.\&.\&. }\fR (see also compact format in function
\fB::imap4::folders\fR)\&.
.CS


{{Arc08 {{\\NoSelect}}} {Arc08/Private {{\\NoInferiors} {\\UnMarked}}} {INBOX {\\NoInferiors}}}

.CE
.TP
\fB::imap4::msginfo\fR \fIchan\fR \fImsgid\fR ?\fIinfo\fR? ?\fIdefval\fR?
.sp
Get information (from previously collected using fetch) from a given
\fImsgid\fR\&. If the 'info' argument is omitted or a null string,
the list of available information options for the given message is
returned\&.
.sp
If the required information name is suffixed with a ? character,
the command returns true if the information is available, or
false if it is not\&.
.sp
\fIchan\fR - imap channel
.sp
\fImsgid\fR - message number
.sp
\fIinfo\fR - imap keyword to retrieve
.sp
\fIdefval\fR - default value, returned if info is empty
.sp
\fINote:\fR
All message index ranges are 1-based\&.
.TP
\fB::imap4::mboxinfo\fR \fIchan\fR ?\fIinfo\fR?
.sp
Get information on the currently selected mailbox\&.
If the \fIinfo\fR argument is omitted or a null string, the list
of available information options for the mailbox is returned\&.
.sp
If the required information name is suffixed with a ? character,
the command returns true if the information is available, or
false if it is not\&.
.sp
\fIchan\fR - imap channel
.sp
\fIopt\fR - mailbox option to retrieve
.sp
Currently supported options:
\fIEXISTS\fR (noof msgs),
\fIRECENT\fR (noof 'recent' flagged msgs),
\fIFLAGS\fR
.sp
In conjunction with OK:
\fIPERMFLAGS\fR, \fIUIDNEXT\fR, \fIUIDVAL\fR, \fIUNSEEN\fR
.sp
Div\&. states:
\fICURRENT\fR, \fIFOUND\fR, \fIPERM\fR\&.
.CS


    ::imap4::select $chan INBOX
    puts "[::imap4::mboxinfo $chan exists] mails in INBOX"
.CE
.TP
\fB::imap4::isableto\fR \fIchan\fR ?\fIcapability\fR?
.sp
Test for capability\&.
It returns 1 if requested capability is supported, 0 otherwise\&.
If \fIcapability\fR is omitted all capability imap
codes are retured as list\&.
.sp
\fIchan\fR - imap channel
.sp
\fIinfo\fR - imap keyword to retrieve
.sp
\fINote:\fR
Use the capability command to ask the server if not
already done by the user\&.
.TP
\fB::imap4::create\fR \fIchan\fR \fImailbox\fR
.sp
Create a new mailbox\&.
.sp
\fIchan\fR - imap channel
.sp
\fImailbox\fR - mailbox name
.TP
\fB::imap4::delete\fR \fIchan\fR \fImailbox\fR
.sp
Delete a new mailbox\&.
.sp
\fIchan\fR - imap channel
.sp
\fImailbox\fR - mailbox name
.TP
\fB::imap4::rename\fR \fIchan\fR \fIoldname\fR \fInewname\fR
.sp
Rename a new mailbox\&.
.sp
\fIchan\fR - imap channel
.sp
\fImailbox\fR - old mailbox name
.sp
\fImailbox\fR - new mailbox name
.TP
\fB::imap4::subscribe\fR \fIchan\fR \fImailbox\fR
.sp
Subscribe a new mailbox\&.
.sp
\fIchan\fR - imap channel
.sp
\fImailbox\fR - mailbox name
.TP
\fB::imap4::unsubscribe\fR \fIchan\fR \fImailbox\fR
.sp
Unsubscribe a new mailbox\&.
.sp
\fIchan\fR - imap channel
.sp
\fImailbox\fR - mailbox name
.TP
\fB::imap4::search\fR \fIchan\fR \fIexpr\fR ?\fI\&.\&.\&.\fR?
.sp
Search for mails matching search criterions, 0 is returned on success\&.
.sp
\fIchan\fR - imap channel
.sp
\fIexpr\fR - imap search expression
.sp
\fINotes:\fR
Currently the following search expressions are handled:
.sp
\fIMail header flags:\fR
all mail header entries (ending with a colon ":"), like "From:", "Bcc:", \&.\&.\&.
.sp
\fIImap message search flags:\fR
ANSWERED, DELETED, DRAFT, FLAGGED, RECENT,
SEEN, NEW, OLD, UNANSWERED, UNDELETED,
UNDRAFT, UNFLAGGED, UNSEEN, ALL
.sp
\fIImap header search flags:\fR
BODY, CC, FROM, SUBJECT, TEXT, KEYWORD, BCC
.sp
\fIImap conditional search flags:\fR
SMALLER, LARGER, ON, SENTBEFORE, SENTON, SENTSINCE, SINCE,
BEFORE (not implemented),
UID (not implemented)
.sp
\fILogical search conditions:\fR
OR, NOT
.CS

::imap4::search $chan larger 4000 seen
puts "Found messages: [::imap4::mboxinfo $chan found]"
Found messages: 1 3 6 7 8 9 13 14 15 19 20
.CE
.TP
\fB::imap4::close\fR \fIchan\fR
.sp
Close the mailbox\&. Permanently removes \\Deleted messages and
return to the AUTH state\&.
.sp
\fIchan\fR - imap channel
.TP
\fB::imap4::cleanup\fR \fIchan\fR
.sp
Destroy an IMAP connection and free the used space\&.
Close the mailbox\&. Permanently removes \\Deleted messages
and return to the AUTH state\&.
.sp
\fIchan\fR - imap channel
.TP
\fB::imap4::debugmode\fR \fIchan\fR ?\fIerrormsg\fR?
Switch client into command line debug mode\&.
.sp
This is a developers mode only that pass the control to the
programmer\&. Every line entered is sent verbatim to the
server (after the addition of the request identifier)\&.
The ::imap4::debug variable is automatically set to '1' on enter\&.
.sp
It's possible to execute Tcl commands starting the line
with a slash\&.
.sp
\fIchan\fR - imap channel
.sp
\fIerrormsg\fR - optional error message to display
.TP
\fB::imap4::store\fR \fIchan\fR \fIrange\fR \fIdata\fR \fIflaglist\fR
.sp
Alters data associated with a message in the selected
mailbox\&.
.sp
\fIchan\fR - imap channel
.sp
\fIrange\fR - message index in format \fIFROM\fR:\fITO\fR
.sp
\fIflaglist\fR - Flags the \fIdata\fR operates on\&.
.sp
\fIdata\fR - The currently defined \fIdata\fR items that can be
stored are shown below\&. \fINote\fR that all of these data types may
also be suffixed with "\&.SILENT" to suppress the untagged FETCH
response\&.
.RS
.TP
FLAGS
Replace the flags for the message (other than \\Recent) with the
\fIflaglist\fR\&.
.TP
+FLAGS
Add the flags in \fIflaglist\fR to the existing flags for the message\&.
.TP
-FLAGS
Remove the flags in \fIflaglist\fR to the existing flags for the
message\&.
.RE
.IP
For example:
.CS


	::imap4::store $chan $start_msgid:$end_msgid +FLAGS "Deleted"

.CE
.TP
\fB::imap4::expunge\fR \fIchan\fR
.sp
Permanently removes all messages that have the \\Deleted flag
set from the currently selected mailbox, without the need to close the
connection\&.
.sp
\fIchan\fR - imap channel
.TP
\fB::imap4::copy\fR \fIchan\fR \fImsgid\fR \fImailbox\fR
.sp
Copies the specified message (identified by its message number)
to the named mailbox, i\&.e\&. imap folder\&.
.sp
\fIchan\fR - imap channel
.sp
\fImsgid\fR - message number
.sp
\fImailbox\fR - mailbox name
.TP
\fB::imap4::logout\fR \fIchan\fR
.sp
Informs the server that the client is done with the connection
and closes the network connection\&. Permanently removes \\Deleted
messages\&.
.sp
A new connection will need to be established to login once
more\&.
.sp
\fIchan\fR - imap channel
.PP
.SH EXAMPLES
.CS


    set user myusername
    set pass xtremescrt
    set server imap\&.test\&.tld
    set FOLDER INBOX
    # Connect to server
    set imap [::imap4::open $server]
    ::imap4::login $imap $user $pass
    ::imap4::select $imap $FOLDER
    # Output all the information about that mailbox
    foreach info [::imap4::mboxinfo $imap] {
        puts "$info -> [::imap4::mboxinfo $imap $info]"
    }
    # fetch 3 records inline
    set fields {from: to: subject: size}
    foreach rec [::imap4::fetch $imap :3 -inline {*}$fields] {
        puts -nonewline "#[incr idx])"
        for {set j 0} {$j<[llength $fields]} {incr j} {
            puts "\\t[lindex $fields $j] [lindex $rec $j]"
        }
    }

    # Show all the information available about the message ID 1
    puts "Available info about message 1: [::imap4::msginfo $imap 1]"

    # Use the capability stuff
    puts "Capabilities: [::imap4::isableto $imap]"
    puts "Is able to imap4rev1? [::imap4::isableto $imap imap4rev1]"

    # Cleanup
    ::imap4::cleanup $imap

.CE
.SH "TLS SECURITY CONSIDERATIONS"
.PP
This package uses the \fBTLS\fR package to handle the
security for \fBhttps\fR urls and other socket connections\&.
.PP
Policy decisions like the set of protocols to support and what
ciphers to use are not the responsibility of \fBTLS\fR, nor of
this package itself however\&.
Such decisions are the responsibility of whichever application is
using the package, and are likely influenced by the set of servers
the application will talk to as well\&.
.PP
For example, in light of the recent
\fIPOODLE attack\fR [http://googleonlinesecurity\&.blogspot\&.co\&.uk/2014/10/this-poodle-bites-exploiting-ssl-30\&.html] discovered by Google many servers will disable support
for the SSLv3 protocol\&.
To handle this change the applications using \fBTLS\fR must be
patched, and not this package, nor \fBTLS\fR itself\&.
Such a patch may be as simple as generally activating \fBtls1\fR
support, as shown in the example below\&.
.CS


    package require tls
    tls::init -tls1 1 ;# forcibly activate support for the TLS1 protocol

    \&.\&.\&. your own application code \&.\&.\&.

.CE
.SH REFERENCES
Mark R\&. Crispin, "INTERNET MESSAGE ACCESS PROTOCOL - VERSION 4rev1",
RFC 3501, March 2003, \fIhttp://www\&.rfc-editor\&.org/rfc/rfc3501\&.txt\fR
.PP
OpenSSL, \fIhttp://www\&.openssl\&.org/\fR
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fIimap4\fR of the
\fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&.
Please also report any ideas for enhancements you may have for either
package and/or documentation\&.
.PP
When proposing code changes, please provide \fIunified diffs\fR,
i\&.e the output of \fBdiff -u\fR\&.
.PP
Note further that \fIattachments\fR are strongly preferred over
inlined patches\&. Attachments can be made by going to the \fBEdit\fR
form of the ticket immediately after its creation, and then using the
left-most button in the secondary navigation bar\&.
Only a small part of rfc3501 implemented\&.
.SH "SEE ALSO"
ftp, http, imap, mime, pop3, tls
.SH KEYWORDS
email, imap, internet, mail, net, rfc3501, ssl, tls
.SH CATEGORY
Networking