Feature #13088

CDN support to jquery/ui lib

Added by Bill Wang over 8 years ago. Updated over 8 years ago.

Status:NewStart date:
Priority:NormalDue date:
Assignee:-% Done:

0%

Category:Administration
Target version:Candidate for next major release
Resolution:

Description

1. add CDN support to jquery/ui lib -> include css and image files
2. Supports multiple CDN. (Google, Microsoft, jquery.com, etc.) -> maybe from config file?
3. jQuery version is automatically detected -> no duplicated
4. Automatically fallback to local bundled if CDN is down or unreachable

History

#1 Updated by Daniel Felix over 8 years ago

  • Category set to Administration
  • Target version set to Candidate for next major release

1. and 4. could be integrated with something like this (from HTML5 Boilerplate)
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script>
<script>window.jQuery || document.write('<script src="js/vendor/jquery-1.8.0.min.js"><\/script>')</script>

2. The first line of the above mentioned code could be dynamic, which is generated depending on the settings in the administration.
There could be something like a pulldown (just local, jquery, microsoft, google, etc.)

3. Hm, well an automatic detection could be tricky. Example: jQuery updates to jQuery 2.x which possibly remove some function or change some function definition. This could break some features. I would prefer, that the developers choose which version should be used or not.

#2 Updated by Etienne Massip over 8 years ago

Don't forget that Redmine can be deployed on a LAN not connected to the Internet.

#3 Updated by Jan Niggemann (redmine.org team member) over 8 years ago

Etienne Massip wrote:

Don't forget that Redmine can be deployed on a LAN not connected to the Internet.

Wouldn't that match case no 4?

#4 Updated by Bill Wang over 8 years ago

3. Hm, well an automatic detection could be tricky. Example: jQuery updates to jQuery 2.x which possibly remove some function or change some function definition. This could break some features. I would prefer, that the developers choose which version should be used or not.

I mean what versioin of lib we get from CDN should be same as the version from local bundled.
so it is same API whatever from CDN or local.

#5 Updated by Daniel Felix over 8 years ago

Etienne Massip wrote:

Don't forget that Redmine can be deployed on a LAN not connected to the Internet.

Well this would be handled by my mentioned code above. If the extern server isn't available, the local code would be handled.
OR:
See my point two. If the user selects "none", just the local source would be used.

#6 Updated by Etienne Massip over 8 years ago

I'm not sure Redmine should handle CDN configuration; administrators who want to have assets delivered by CDN should already be able to do such with some config:

 ActionController::Base.asset_host = Proc.new { |source|
   if source ~= /.*jquery.*/
     "//ajax.googleapis.com/ajax/libs/jquery" 
   end
 }

(this is a hand-written untested probably nonfunctional example)

You can add fallback mechanism, etc.

See http://api.rubyonrails.org/classes/ActionView/Helpers/AssetTagHelper.html.

#7 Updated by Jean-Philippe Lang over 8 years ago

JQuery and JQuery-UI are merged in Redmine assets so it wouldn't work. It's hacky anyway and would make the upgrade process painfull. That's the purpose of this request to make using a CDN straightforward.

#8 Updated by Etienne Massip over 8 years ago

Jean-Philippe Lang wrote:

JQuery and JQuery-UI are merged in Redmine assets so it wouldn't work.

That was a non-functionnal example for demonstration purpose.

It's hacky anyway

It's Rails configuration?

and would make the upgrade process painfull.

Why would it be? Could be in config/additional_environment.rb, couldn't it?

That's the purpose of this request to make using a CDN straightforward.

IMHO this should be handled by the Rails stack since it can be, rather than Redmine.

#9 Updated by Jean-Philippe Lang over 8 years ago

Sure, you can do pretty much everything in additional_environment.rb if you know about Rails configuration (which changes quite often BTW), Ruby, regexp and all but that's not what we can call "configuration". What I see here is a way to enable a CDN by simply uncommenting something like jquery_cdn: google in configuration.yml.

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