zeroflag opened a new pull request, #798:
URL: https://github.com/apache/knox/pull/798
## What changes were proposed in this pull request?
Incoming Headers are not going through when using OPTIONS type HTTP requests.
## How was this patch tested?
Sandbox topology
```xml
<service>
<role>HIVE</role>
<url>http://localhost:1701/headers</url>
<param>
<name>replayBufferSize</name>
<value>8</value>
</param>
</service>
```
Test HTTP server that logs out the received headers:
```smalltalk
Teapot on
OPTIONS: '/headers' -> [:req |
req headersDo: [:n :v | Transcript show: ('Received: ', n, '=', v); cr
]. 'OK' ];
start.
```
$ curl -X OPTIONS -u admin:admin-password -H 'My-Header: My-Value' -vk
https://localhost:8443/gateway/sandbox/hive
```
Transcript content:
```
Received: X-Forwarded-Proto=https
Received: X-Forwarded-Port=8443
Received: X-Forwarded-Host=localhost:8443
Received: X-Forwarded-Server=localhost
Received: X-Forwarded-Context=/gateway/sandbox
Received: Accept=*/*
Received: User-Agent=curl/7.64.1
Received: My-Header=My-Value
Received: Authorization=Basic YWRtaW46Kg==
Received: Host=localhost:1701
Received: Connection=Keep-Alive
Received: X-Zinc-Remote-Address=127.0.0.1
```
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