GitHub user Leemoonsoo opened a pull request:
https://github.com/apache/incubator-zeppelin/pull/863
Prevent duplicated response header insertion
### What is this PR for?
Headers are inserted twice in http response message after
https://github.com/apache/incubator-zeppelin/pull/831.
it prevents zeppelin-web development mode working (cd zeppelin-web; grunt
serve)

This PR provides (dirty) fix for the problem. If anyone knows better way to
prevent duplicated header insertion, please let me know.
### What type of PR is it?
Bug Fix
### Todos
* [x] - Prevent duplicated header insertion
### What is the Jira issue?
### How should this be tested?
Check if dev mode works. ie. 'cd zeppelin-web; grunt serve', browse
http://localhost:9000
or
run `curl -vv http://localhost:8080/api/security/ticket` and see if
there're duplicated headers
### Screenshots (if appropriate)
### Questions:
* Does the licenses files need update? no
* Is there breaking changes for older versions? no
* Does this needs documentation? no
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/Leemoonsoo/incubator-zeppelin
fix_duplicated_resp_header
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-zeppelin/pull/863.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #863
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commit 76a92be4b866ef5af474b9e96cb9956b2a070952
Author: Lee moon soo <[email protected]>
Date: 2016-04-28T16:13:05Z
Prevent duplicated response header insertion
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