Re: [Jython-users] class.getResource() & URL->URI error

[Alan K. <jyt...@xh...>]

[Aaron]
> Here is the (ugly) patch that fixes the problem:
> http://code.google.com/p/okapi/source/detail?r=94a4cf4b997a665dce76ef3f44447a2f24b9de02&name=dev

As far as I can see, the problematic data is being produced in Java,
and you have introduced a java hack, written in java to address the
issue, before the data is passed to jython.

Specifically, your fix is this

59 	59 		URL url = getClass().getResource("default.fprm");
60 	60 		try {
61 		- 	params.load(url.toURI(), false);
	61 	+ 	// Replace the slashes to work around jython issues
	62 	+ 	params.load(new URI(url.toString().replace('\\', '/')), false);
62 	63 		}
63 	64 		catch ( URISyntaxException e ) {

So getClass().getResource("blah") on your particular JVM + OS
combination (running inside a servlet container?) has returned a
string containing windows slashes ("\"). Jython interprets "\" as an
escape slash (as do most languages, including java, as is illustrated
by the first parameter to your replace() method).

So when you pass a string to jython that contains escape slashes, you
can't expect jython to treat them as anything other than escape
slashes, no matter what the operating system.

http://docs.python.org/reference/lexical_analysis.html#string-literals

The string you are passing to jython is:

jar:file:C:\Users\username\path\to\jar\project.jar!/path/to/resource/somefile

The following are special characters

\U (as appears in \Users) jython interprets as a 32-bit Unicode value
\u (as appears in \username) jython interprets as a 16-bit Unicode value
\t (as appears in \to) jython interprets as a tab character

I think that you need to get to bottom of why your
servlet-container+JVM-version+Windows-OS combination returns Windows
slashes, aka jython escape slashes, from the getResource() call.

When you resolve that issue, your problems will disappear.

And they are not jython problems.

Alan.