Can't understand how to do server response with vibed

[Suliman via Digitalmars-d-learn]

On Saturday, 28 November 2015 at 23:21:21 UTC, Sebastiaan Koppe 
wrote:
> On Saturday, 28 November 2015 at 19:05:59 UTC, Suliman wrote:
>> And also I can't understand difference between 
>> HTTPClientRequest and HTTPServerRequest
>
> If the application (vibe.d) makes a request, it is the client. 
> If the request is made to your application, it is the server.
>
> In your case your angular app is the client, and your vibe.d 
> app is the server. Therefor, HTTPServer(Request|Response).

Could you explain me about: HTTPServerRequest and HTTPRequest. I 
can't understand difference.