compiling java from within python

Question

I'm making an application where people can upload a java code and do stuff with it.

The application i'm making is in Python. I was wondering whether it was possible to call the 'javac' command from within python, in order to compile the uploaded java file

I'm also using JPype

So, where is your problem? Please post (as an edit to the question) what you are doing, and what the result (error messages and such) is. — Paŭlo Ebermann
– Paŭlo Ebermann, Commented Aug 10, 2011 at 19:21

Amber · Accepted Answer · 2011-08-10 16:46:13Z

4

http://docs.python.org/library/subprocess.html

But are you sure that allowing people to submit arbitrary code is a good idea? There are security aspects of that to consider...

answered Aug 10, 2011 at 16:46

Amber

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4 Comments

tgoossens Over a year ago

The program runs on their own computer. So there's no risk in it for me

Erik Forsberg Over a year ago

And that computer has network access? So someone can upload a java program that is an open proxy, or a web server that serves illegal content, or..

Paŭlo Ebermann Over a year ago

@Erik: I suppose this is a kind of applet, which will run on the client's computer (= the same one which uploaded the code). There is no new danger here - if someone bad can upload from a client, he already can execute stuff there.

tgoossens Over a year ago

Could i have a little bit of help? I don't immediately have an idea on how to use classpaths etc to get java working

Femi · Accepted Answer · 2011-08-10 16:45:56Z

0

Entirely possible: just use the system command and invoke the java compiler. You'll probably need to set class paths and things of that nature, but it should work fine.

EDIT: see http://docs.python.org/library/os.html#os.system and http://docs.python.org/library/subprocess.html#module-subprocess for detail on invoking sub processes. You'll probably want to capture the output to return to the user in the event of a compile error.

answered Aug 10, 2011 at 16:45

Femi

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1 Comment

Amber Over a year ago

subprocess.call is vastly superior to os.system.

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