[GitHub] [trafficcontrol] ocket8888 opened a new pull request #3554: Added an HTTP-Header equivalent for 'format' TR Query Param

[GitBox <gi...@apache.org>]

ocket8888 opened a new pull request #3554: Added an HTTP-Header equivalent for 'format' TR Query Param
URL: https://github.com/apache/trafficcontrol/pull/3554
 
 
   ## What does this PR (Pull Request) do?
   - [x] This PR is not related to any Issue
   Adds the `X-TC-Format` HTTP Header as an alternative to/equivalent of the `format` query parameter for TR to use in formatting responses to requests to STEERING Delivery Services.
   
   Accepts either `json` (for compatibility with the query parameter) or `application/json` (for compatibility with HTTP content negotiation) to format response as JSON.
   
   ## Which Traffic Control components are affected by this PR?
   - Documentation
   - Traffic Router
   
   ## What is the best way to verify this PR?
   You could run the TR unit tests, as well as verifying that TR responses to STEERING requests are properly formatted when `X-TC-Format` is given and set to a valid value.
   
   ## The following criteria are ALL met by this PR
   - [ ] This PR includes tests OR I have explained why tests are unnecessary
   - [ ] This PR includes documentation OR I have explained why documentation is unnecessary
   - [ ] This PR includes an update to CHANGELOG.md OR such an update is not necessary
   - [x] This PR includes any and all required license headers
   - [x] This PR ensures that database migration sequence is correct OR this PR does not include a database migration
   - [x] This PR **DOES NOT FIX A SERIOUS SECURITY VULNERABILITY**

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