Fixes checks related to OperationView.js content-disposition headers

[zupper]

Basically did what was left to do in PR #1122 (related to issue #1196). Also PR is to develop_2.0 this time...

[lukasznowak-silvair]

I did some tests to check this fix and I see some strange behavior:

My response from REST API:

{
  "date": "Thu, 07 May 2015 12:22:21 GMT",
  "content-disposition": "attachment; filename=\"icons.tgz\"",
  "connection": "Keep-Alive",
  "keep-alive": "timeout=5, max=100",
  "transfer-encoding": "chunked",
  "server": "Jetty(8.1.15.v20140411)",
  "content-type": "application/octet-stream"
}

After "Try it out!" I get Response Body:

Download icon?token=364edd8ab7be2e36

After download the file name is

application-octet-stream-icon-token=364edd8ab7be2e36-blob-https%3A--domain.com-b7c305ac-29c1-48ec-ad6b-9dc62c28fff8

What is more the content of the file is different. I do not know if this is related to this fix or this is some old bug.

[zupper]

@lnowak, I don't think the situation you describe is related to this fix. This merely adds an improved check for specific headers so that the app wouldn't crash with a NPE. The only source file that was changed is src/main/javascript/view/OperationView.js.