Where to start debugging web-applications?

Programming Questions

bejoschac..

Where to start debugging web-applications?

in Programming Questions • 3 years ago

I'm not sure if this rather belongs in the "integration" or the "implementations" subforum, but I'm sure the mods will shift it

Anyway, I do have a nice working sketch, which runs smoothly from within Processing or when exported as application (Windows), but when exported for web, it does not run in my browser (iExplorer), while my other sketches do.

It does start, however. It even displays the initial screen (loading a PImage with background()), but then it freezes and does not react anymore. It is a rather complex sketch with some classes and several instances of PGraphics (both P2D and JAVA2D), but my real question is:

Where do I start hunting for the culprits? I do not get any error-messages. I simply do not know what is going on.

I was also trying to "export" the sketch with older versions of Processing, but to the same effect.

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PhiLho

Re: Where to start debugging web-applications?

3 years ago

You have to find out for your system/browser how to display the Java console. A quick Internet search should help. In Windows, for example, you can see a Java icon in the control panel, and IIRC the setting is in the advanced panel, but it can be changed per browser too.

You have then a console like the bottom one in the PDE: everything println()ed goes there. If you have an exception, it will display there as well. A common cause of issues in Web applications is security problems: to access the file system, to access the clipboard, and some other sensible operations, you have to sign the jar.

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