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https://issues.apache.org/jira/browse/HTTPCLIENT-1607?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcos Scriven updated HTTPCLIENT-1607:
---------------------------------------
    Description: 
While writing a custom {{AuthScheme}}, I needed to add multiple headers to the 
request.

This is of course possible just by directly adding them to the request 
available as a parameter, but then it makes the return value rather arbitrary. 
Returning null seems to work, and is just silently ignored.

I think it would be more flexible to change the interface to return a 
`HeaderGroup`.

I guess an alternative would be to write a custom filter somewhere, but that 
wouldn't tie in nicely with authentication caches and user credentials 
automatically being applied according to the host route.

  was:
While writing a custom `AuthScheme`, I needed to add multiple headers to the 
request.

This is of course possible just by directly adding them to the request 
available as a parameter, but then it makes the return value rather arbitrary. 
Returning null seems to work, and is just silently ignored.

I think it would be more flexible to change the interface to return a 
`HeaderGroup`.

I guess an alternative would be to write a custom filter somewhere, but that 
wouldn't tie in nicely with authentication caches and user credentials 
automatically being applied according to the host route.


> Change ContextAwareAuthScheme.authenticate to return a HeaderGroup instead of 
> a single Header
> ---------------------------------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-1607
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1607
>             Project: HttpComponents HttpClient
>          Issue Type: Wish
>          Components: HttpClient
>    Affects Versions: 4.3.6
>            Reporter: Marcos Scriven
>            Priority: Minor
>             Fix For: 4.4 Final
>
>
> While writing a custom {{AuthScheme}}, I needed to add multiple headers to 
> the request.
> This is of course possible just by directly adding them to the request 
> available as a parameter, but then it makes the return value rather 
> arbitrary. Returning null seems to work, and is just silently ignored.
> I think it would be more flexible to change the interface to return a 
> `HeaderGroup`.
> I guess an alternative would be to write a custom filter somewhere, but that 
> wouldn't tie in nicely with authentication caches and user credentials 
> automatically being applied according to the host route.



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