AFAIK, write access directly from JavaScript is impossible, and it is this way for security reasons.

It looks like there is a possibility to perform write access using Java: http://www.javascripter.net/faq/writinga.htm#top .

I've been thinking of a possibly using JavaScript as a general purpose scripting language - like Perl/Python/Ruby. I think JavaScript libraries are actively being developed, so the language can become convenient for general purpose tasks.

So, my question is: has anybody developed an extension at source level for an FOSS JavaScript implementation (I guess Firefox/Mozilla JavaScript is such an implementation) ?

I.e. if to along this way one will have to have a locally compiled such JavaScript interpreter with file write access.

Mozilla has something for geneal purpose development outside the browser.

I think there is also ECMA-script for Java.

Sorry I can't recall specifics ATM.

edit
see if one of these matches your interest

http://en.wikipedia.org/wiki/JavaScr...side_web_pages

https://developer.mozilla.org/en/SpiderMonkey

http://en.wikipedia.org/wiki/List_of_JVM_languages

https://developer.mozilla.org/en/Rhino

Thanks.

I think only https://developer.mozilla.org/en/SpiderMonkey matches my interest as a source for which a file writer plugin is needed.

I don't think Java itself has anything to do with what I'm interested in - I'd like not to use Java; the FAQ I gave is just an example how file write access can be implemented using a Java applet, and I want just a small extension to an existing JavaScript interpreter source.

I guess I really don't know what you mean by file writer plugin, but that's okay.

I think the idea of Rhino is to write Javascript programs to be executed in a Java Virtual Machine.

Anyway, I hope you find something which works for your purposes.

I think you can do this with nodejs (nodejs.org).

Lyle.

I didn't read everything, but I read http://nodejs.org/about/ . I don't quite see how writing to files can be achieved.

"Plugin" maybe a bad term in this case. I mean a piece of code to be added to JavaScript interpreter that would add a write to file feature to the language.

Looks like there is filesystem access: http://nodejs.org/docs/latest/api/fs.html

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Yep, thanks.

And examples are even with my favorite anonymous functions.