Julian Mehnle

NAME

Courier::Message - Class implementing an interface to a mail message in the Courier MTA's message queue.

VERSION

0.200

SYNOPSIS

    use Courier::Message;
    
    my $message = Courier::Message->new(
        file_name           => $message_file_name,
        control_file_names  => \@control_file_names,
    );
    
    # File names:
    my $message_file_name   = $message->file_name;
    my @control_file_names  = $message->control_file_names;
    
    # Message data properties:
    my $raw_message_text    = $message->text;
    my $header_hash         = $message->header;
    my $header_field        = $message->header($field);
    my $raw_body            = $message->body;
    
    # Control properties:
    my $control_hash        = $message->control;
    my $is_authenticated    = $message->authenticated;
    my $authenticated_user  = $message->authenticated_user;
    my $is_trusted          = $message->trusted;
    my $sender              = $message->sender;
    my @recipients          = $message->recipients;
    my $remote_host         = $message->remote_host;
    my $remote_host_name    = $message->remote_host_name;

DESCRIPTION

Courier::Message encapsulates a mail message that is stored in the Courier MTA's message queue, including the belonging control file(s), and provides an easy to use, read-only interface through its message data and control properties. For light-weight calling of library functions or external commands, the message and control file names may be retrieved without causing the files to be parsed by Courier::Message.

Constructor

The following constructor is provided:

new(%options): returns Courier::Message

Creates a new Courier::Message object from the given message file name and zero or more control file names.

%options is a list of key/value pairs representing any of the following options:

file_name

Required. The absolute file name of the message file.

control_file_names

Required. An array-ref containing the absolute file name(s) of zero or more control files belonging to the message.

Instance methods

File names

The following file name accessors are provided:

file_name: returns string

Returns the absolute file name of the message file.

control_file_names: returns list of string

Returns the absolute file names of the control files belonging to the message.

Message data properties

text: returns string; throws Perl exceptions

Reads the message text from the message file into memory once. Returns the raw message text as bytes (see bytes, and "bytes" in PerlIO). Throws a Perl exception if the message file cannot be read.

header: returns hash-ref of string
header($field): returns list of string

Parses the message header once by doing the following: tries to interpret the header as UTF-8, falling back to the 8-bit legacy encoding Windows-1252 (a superset of ISO-8859-1) and decoding that to UTF-8; parses header fields from the header; and decodes any MIME encoded words in field values. If no field name is specified, returns a hash-ref containing all header fields and array-refs of their values. If a (case insensitive) field name is specified, in list context returns a list of the values of all header fields of that name, in the order they occurred in the message header, or in scalar context returns the value of the first header field of that name (or undef if no such header field exists).

body: returns string

Returns the raw message body as bytes (see bytes, and "bytes" in PerlIO).

Control properties

control: returns hash-ref of string; throws Perl exceptions
control($field): returns list of string; throws Perl exceptions

Reads and parses all of the message's control files once. If a (case sensitive) field name (i.e. record type) is specified, returns a list of the values of all control fields of that name, in the order they occurred in the control file(s). If no field name is specified, returns a hash-ref containing all control fields and array-refs of their values. Throws a Perl exception if any of the control files cannot be read.

authenticated: returns boolean

Returns the authentication information (guaranteed to be a true value) if the message has been submitted by an authenticated user. Returns false otherwise.

Note: The authentication status and information is currently determined and taken from the message's first (i.e. the trustworthy) "Received" header field. This is guaranteed to work correctly, but is not very elegant, so this is subject to change. As soon as Courier supports storing the complete authentication info (including the authenticated user name) in a control field, that will be the preferred source. This mostly just means that the format of the authentication info will probably change in the future.

authenticated_user: returns string

Returns the user name that was used for authentication during submission of the message. Returns undef if no authentication took place.

trusted: returns boolean

Returns a boolean value indicating whether the message is trusted. Currently, trusted messages are defined to be messages directly submitted by an authenticated user. For details on how the authenticated status is determined, see the description of the authenticated property.

sender: returns string

Returns the message's envelope sender (from the "MAIL FROM" SMTP command).

recipients: returns list of string

Returns all of the message's envelope recipients (from the "RCPT TO" SMTP commands).

remote_host: returns string

Returns the IP address of the SMTP client that submitted the message.

remote_host_name: returns string

Returns the host name (gained by Courier through a DNS reverse lookup) of the SMTP client that submitted the message, if available.

remote_host_helo: returns string

Returns the HELO string that the SMTP client specified, if available.

SEE ALSO

For AVAILABILITY, SUPPORT, and LICENSE information, see Courier::Filter::Overview.

AUTHOR

Julian Mehnle <julian@mehnle.net>