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Jun 16, 2009 (? ago)
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How to Debug Opera Unite apps


Try debug mode from Uniteness for easiest debugging of Unite apps.

Remember that currently Opera Unite is ALPHA software, so expect problems.

Reloading sources: (Right click your service) "Stop service" -> (Right click your service) "Start service" -> (check Error Console (in DragonFly) - read the link, it's important!) -> Press F5.

Interesting find: Reset (function that possibly reloads sources)

Sometimes you need to go as far as re-installing the service. To re-install - rename the folder with your files

If you changed config.xml - you would have to change folder name, then drag config.xml from new location, to force Opera to reload app. Otherwise you risk loading old config.xml (from somewhere in Opera cache).

Never use alert() or window.onunload in your scripts. (Newer info on onunload)

"Resource not found" error can mean just about anything. It seems it's the only error Opera shows.

So far, debugging isn't fun at all.

Slava V. [about me]


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  1. Markuper (HTML templates)
  2. .ua
  3. Opera Unite HowTo's
  4. .us (files)
  5. Distribute Your Application
  6. 24/7 sites (permanent applications - idea) [stub]
  7. Issues
  8. HTTP Connections (AJAX/REST)
  9. Cookies
  10. file_wrap.js - File Wrapper
  11. Basic HowTo: Simple app (tutorial)
  12. Static images, client-side scripts
  13. Application Examples
  14. How to Debug Opera Unite apps
  15. Persistence & databases
  16. Opera Unite benchmark
  17. From PHP to Opera Unite
  18. Uniteness (Framework)
  19. Config.xml
  20. Key-value storage
  21. Widget Object
  22. Notifications (Growl'esque)
  23. Reset (debug)
  24. Cron example
  25. What I meant by CNAMEs
  26. Wish List
  27. Device Unavailable
  28. StopLorem (Opera Unite blogging)
  29. uniteness-0.11
  30. GET/POST data
  31. CRUD And Static (example)
  32. Opera object
  33. URLs
  34. Headers & Redirects
  35. Error Console
  36. JSON State (storing data)
  37. Security
  38. /storage/ (in fileio)
  39. Yusef library
  40. unite_info (a-la php_info)
  41. Javascript Imports
  42. onunload / _close
  43. fileio: Sandboxed Filesystem
  44. Request Hierarchy (like php_info)
  45. Intro: Web Apps with Opera Unite