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https://issues.apache.org/jira/browse/TS-1827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13669607#comment-13669607
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Conan Wang commented on TS-1827:
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I'll test the issue 1 later.
For issue 2, right, it's as intended, at least for CDN (usually only a few
customers among all will enable combo feature). And it looks safer for ATS
users to adopt this plugin.
Should we support the old manner(if not existing combo remap rule, make it
enabled globally for all channels which is a little confusing)?
> minor improvement of combo_handler plugin
> -----------------------------------------
>
> Key: TS-1827
> URL: https://issues.apache.org/jira/browse/TS-1827
> Project: Traffic Server
> Issue Type: Improvement
> Components: Plugins
> Reporter: Conan Wang
> Assignee: Leif Hedstrom
> Fix For: 3.3.3
>
> Attachments: TS-1827.diff
>
>
> Based on TS-1053, I've made some minor improvements. Community can select the
> general ones to review.
> Changes: (separately pasted on pastebin temporally; may provide with commits
> later after TS-1053 is solved on git master):
> # use HOST header as default bucket http://pastebin.com/pGHfLaHR
> Original code use the first segment of Host as the default bucket and it's
> not that expandable (two different combo domain may have same leading
> segment). Moreover, the initial default bucket("l") will not be used, because
> all requests should have a HOST.
> # sub-file's path need to contain querystring, i.e. question mark("?") is
> part of the file path, not the delimiter http://pastebin.com/HvMJBQw0
> We use querystring to version each single sub-file in the combined url. If we
> want to update/purge one of them, it can be simply accomplished by changing
> the version of sub-file. (If not, you have to purge both the combined url and
> sub-file url which is relatively hard to know the latter one when you are not
> very familiar with ATS. Of course you can alter the filename if possible in
> your site.)
> Then the combo url could be like
> http://example.com/combo?file1?v=2012&file2?v=2013
> # request hangs when combo url has no querystring http://pastebin.com/d34ZJDzQ
> # make plugin per-remap enabled/disabled http://pastebin.com/YTaDYvh2
> It's implemented by adding some remap code and make global part "intercepted"
> in TS_EVENT_HTTP_OS_DNS instead of TS_EVENT_HTTP_READ_REQUEST_HDR in order to
> read the flag set in TSRemapDoRemap.
> So remap.config will be: {code}
> map http://example.com http://os.example.com @plugin=combo_handler.so
> map http://localhost/example.com http://os.example.com
> map http://other.com http://os.other.com # combo for this channel is
> disabled
> {code}
> # limit sub-file max count and querystring length for potential problems
> http://pastebin.com/cmBCuCNB
> # log failed url http://pastebin.com/bNezeaz0
> They were tested on 3.0.x.
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