Reading a file can be done easily with ETNA - IIRC, one of the Blitz examples does just that since it's the simplest thing that ETNA can do. However, writing to a file needs some PHP or ASP knowledge as you can't edit a web file (txt or otherwise) just by chucking a few TCP commands at it. You would use ETNA to send a command such as "addtotextfile.php?newtext=This is some test text to be added to the file". Your addtotextfile page would contain a script to take the parameter and add the text to the file.
I'm afraid there's no easy way around it if you don't know PHP, so you'd need to learn it or talk nicely to someone who can sort it out for you. Of course, you would also need web space which supported PHP.
I'm afraid there's no easy way around it if you don't know PHP, so you'd need to learn it or talk nicely to someone who can sort it out for you. Of course, you would also need web space which supported PHP.