80 lines
2.7 KiB
JavaScript
80 lines
2.7 KiB
JavaScript
//
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// Copyright (C) 2001-2019 Graeme Walker <graeme_walker@users.sourceforge.net>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// ===
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//
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// emailrelay-edit-envelope.js
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//
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// An example "--filter" script for Windows that edits the message's envelope
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// file.
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//
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// In this example the "MailFromAuthOut" field in the envelope file is
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// modified; this is used as the MAIL FROM AUTH parameter when the emailrelay
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// server forwards the message to the downstream server. In principle
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// (RFC-2554) when relaying the outgoing MAIL FROM AUTH value should be the
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// same as the incoming value iff the submitting client was authenticated
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// and trusted; or it can be the the submitting client's authentication id
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// if there was no incoming value; or it can be "<>".
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//
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try
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{
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// parse the command-line to get the envelope filename
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var content = WScript.Arguments(0) ;
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var envelope = WScript.Arguments(1) ;
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// open the envelope file
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var fs = WScript.CreateObject( "Scripting.FileSystemObject" ) ;
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var ts = fs.OpenTextFile( envelope , 1 , false ) ;
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// read the contents of the envelope file
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var txt = ts.ReadAll() ;
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ts.Close() ;
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// read the incoming values
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var re_auth_in = new RegExp( "^X-MailRelay-MailFromAuthIn: *(\\S*)" , "m" ) ;
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txt.match( re_auth_in ) ;
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var auth_in = RegExp.lastParen ;
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var re_authentication = new RegExp( "^X-MailRelay-Authentication: *(\\S*)" , "m" ) ;
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txt.match( re_authentication ) ;
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var authentication = RegExp.lastParen ;
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// choose the auth-out value
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var auth_out = "<>" ;
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if( authentication )
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{
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function xtext( x ) { return x } // todo
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auth_out = auth_in ? auth_in : xtext(authentication) ;
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}
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// set the auth-out
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var re = new RegExp( "X-MailRelay-MailFromAuthOut: *\\S*" ) ;
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txt = txt.replace( re , "X-MailRelay-MailFromAuthOut: " + auth_out ) ;
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// write the envelope file back out
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ts = fs.OpenTextFile( envelope , 2 , false ) ;
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ts.Write( txt ) ;
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ts.Close() ;
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// successful exit
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WScript.Quit( 0 ) ;
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}
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catch( e )
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{
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// report errors using the special <<...>> markers
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WScript.StdOut.WriteLine( "<<edit failed>>" ) ;
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WScript.StdOut.WriteLine( "<<" + e + ">>" ) ;
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WScript.Quit( 1 ) ;
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}
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