Re: File attachment process

Jonathan Angliss-2 wrote:

On Thu, 9 Jul 2009 09:55:43 -0700 (PDT), pantera975
<pantera975@hotmail.com> wrote:

>
>I have been working on a project for work where I'm changing the file
>attachment process in squirrelmail. I've got most of it worked out but I'm
>stuck in a certain area. I'll try to explain it clearly.

What changes are you making?

>User1: Writes an e-mail and adds an attachment. By doing this the file is
>put /var/spool/squirrelmail/attach/ and named by GenerateRandomString(32,
>'', 7). He has not sent yet so at this point /var/spool/squirrelmail/attach/
>contains 1 file (3543eknohgsogjfdnsdfh)
>
>User2: Writes an e-mail and adds an attachment. Their attachment does the
>same thing but with a different random string. Now
>/var/spool/squirrelmail/attach/ has 2 files. (3543eknohgsogjfdnsdfh and
>aklfas5435jn6as)
>
>User1: Clicks send and somehow squirrelmail knows to only get
>3543eknohgsogjfdnsdfh and not the other. How is this done? What part of the
>code tells it what files names to look for in
>/var/spool/squirrelmail/attach/ during the send process.

When the attach code is ran, the file is uploaded, and dropped into
the $attach_dir folder (saveAttachedFiles() in src/compose.php).  The
temporary name, and actual file name are stored in the Message object
(see line 1399 of src/compose.php and line 1089 of
class/mime/Message.class.php).  This is then serialized, and added to
the compose form.  See the hidden form item attachments around line
1277 in src/compose.php.

When the message is finally ready for sending, the delivery class is
called (class/deliver/Deliver_SMTP.class.php), where writeBody is
executed, which walks through all the attachments, and writes them to
the necessary stream (smtp/sendmail).

That help?

--
Jonathan Angliss
<jon@squirrelmail.org>


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