03-08-2013
So, you need to receive mail, discard/set aside if not from ID or no attachment, extract the attachment and in the process overwrite a former file?
Sometimes it is better to delet the old file and write a new one, for programs that have the old file open.
You need a script-friendly attachment-capable email client. Perhaps PERL has libraries that support this.
If the email structure is pretty constant, you can find the attachment and extract it with common shell tools like sed or awk, and maybe a decoder like base-64. Take an email apart in vi and see.
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LEARN ABOUT DEBIAN
email::abstract
Email::Abstract(3pm) User Contributed Perl Documentation Email::Abstract(3pm)
NAME
Email::Abstract - unified interface to mail representations
SYNOPSIS
my $message = Mail::Message->read($rfc822)
|| Email::Simple->new($rfc822)
|| Mail::Internet->new([split /
/, $rfc822])
|| ...
|| $rfc822;
my $email = Email::Abstract->new($message);
my $subject = $email->get_header("Subject");
$email->set_header(Subject => "My new subject");
my $body = $email->get_body;
$rfc822 = $email->as_string;
my $mail_message = $email->cast("Mail::Message");
DESCRIPTION
"Email::Abstract" provides module writers with the ability to write simple, representation-independent mail handling code. For instance, in
the cases of "Mail::Thread" or "Mail::ListDetector", a key part of the code involves reading the headers from a mail object. Where
previously one would either have to specify the mail class required, or to build a new object from scratch, "Email::Abstract" can be used
to perform certain simple operations on an object regardless of its underlying representation.
"Email::Abstract" currently supports "Mail::Internet", "MIME::Entity", "Mail::Message", "Email::Simple" and "Email::MIME". Other
representations are encouraged to create their own "Email::Abstract::*" class by copying "Email::Abstract::EmailSimple". All modules
installed under the "Email::Abstract" hierarchy will be automatically picked up and used.
METHODS
All of these methods may be called either as object methods or as class methods. When called as class methods, the email object (of any
class supported by Email::Abstract) must be prepended to the list of arguments, like so:
my $return = Email::Abstract->method($message, @args);
This is provided primarily for backwards compatibility.
new
my $email = Email::Abstract->new($message);
Given a message, either as a string or as an object for which an adapter is installed, this method will return a Email::Abstract object
wrapping the message.
If the message is given as a string, it will be used to construct an object, which will then be wrapped.
get_header
my $header = $email->get_header($header_name);
my @headers = $email->get_header($header_name);
This returns the values for the given header. In scalar context, it returns the first value.
set_header
$email->set_header($header => @values);
This sets the $header header to the given one or more values.
get_body
my $body = $email->get_body;
This returns the body as a string.
set_body
$email->set_body($string);
This changes the body of the email to the given string.
WARNING! You probably don't want to call this method, despite what you may think. Email message bodies are complicated, and rely on
things like content type, encoding, and various MIME requirements. If you call "set_body" on a message more complicated than a single-part
seven-bit plain-text message, you are likely to break something. If you need to do this sort of thing, you should probably use a specific
message class from end to end.
This method is left in place for backwards compatibility.
as_string
my $string = $email->as_string;
This returns the whole email as a decoded string.
cast
my $mime_entity = $email->cast('MIME::Entity');
This method will convert a message from one message class to another. It will throw an exception if no adapter for the target class is
known, or if the adapter does not provide a "construct" method.
object
my $message = $email->object;
This method returns the message object wrapped by Email::Abstract. If called as a class method, it returns false.
Note that, because strings are converted to message objects before wrapping, this method will return an object when the Email::Abstract was
constructed from a string.
PERL EMAIL PROJECT
This module is maintained by the Perl Email Project
<http://emailproject.perl.org/wiki/Email::Abstract>
AUTHOR
Casey West, <casey@geeknest.com>
Simon Cozens, <simon@cpan.org>
Ricardo SIGNES, <rjbs@cpan.org>
COPYRIGHT AND LICENSE
Copyright 2004 by Simon Cozens
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.10.1 2011-02-18 Email::Abstract(3pm)