[swift-server-dev] HTTP API proposal for TLS integration

[Gelareh Taban]

Good points on the existing design (without TLS). I worked with what was
there, but in general I like the idea of having an options class, which
gets set in `init`. Kind of like what we did with TLSConfiguration.

I can't comment on the parser/writer design and the multi-port, perhaps
@Chris Bailey?

gelareh




From:	Helge Heß via swift-server-dev <swift-server-dev at swift.org>
To:	Helge Heß via swift-server-dev <swift-server-dev at swift.org>
Date:	10/30/2017 12:06 PM
Subject:	Re: [swift-server-dev] HTTP API proposal for TLS integration
Sent by:	swift-server-dev-bounces at swift.org



Hi,

a few things I noticed working on it:

- IMO the closure, ports and stuff should go into the `init`.

- The HTTPServing thing I don’t get at all. Why do we need this?
- Kinda the same for HTTPResponseWriter. (it is particularly weird that the
writer is coupled with the parser in this implementation - they should be
completely distinct).

- `start` should maybe be called `resume`, and `stop` `suspend` to match
what GCD and Cocoa are doing.

- If we get tons of options we may rather want to add a

class HTTPServer {
  class Options { // a class because subclasses may want to add
    var certificate : ..
    var port : ...
  }
}

- Other things we need in the options: request/response logging.

- I was also wondering how we would want to handle multiple ports and in
general addresses.
You would at least want to be able to listen on IPv6 …

I can see two options here:
- either create multiple server objects for each sockaddr_in
- or add listeners to the server objects
  - this could be internal, but there needs to API to specify
    what sockaddr_in’s you want to listen on.

hh

> On 30. Oct 2017, at 17:41, Gelareh Taban via swift-server-dev
<swift-server-dev at swift.org> wrote:
>
> Hi all,
>
> As part of PR#78 for TLS integration into HTTP,
https://github.com/swift-server/http/pull/78, I had to update the HTTP API
and would like to ask for feedback.
>
> The TLS code sits in:
> https://github.com/gtaban/security.git // protocol definitions and data
types
> https://github.com/gtaban/TLSService.git // implementation using OpenSSL
on Linux and SecureTransport on macOS
>
> The proposed HTTP API changes are in HTTPServing protocol:
>
> /// Start the HTTP server on the given `port`, using `handler` to process
incoming requests
> - func start(port: Int, handler: @escaping HTTPRequestHandler) throws
>
> + func start(port: Int, tls: TLSConfiguration?, handler: @escaping
HTTPRequestHandler) throws
>
>
> and HTTPServer class `start()` function:
>
> - public func start(port: Int = 0, handler: @escaping HTTPRequestHandler)
throws {
> - try server.start(port: port, handler: handler)
>
> + public func start(port: Int = 0, tls: TLSConfiguration? = nil, handler:
@escaping HTTPRequestHandler) throws {
> + try server.start(port: port, tlsConfig: tls, handler: handler)
>
> TLSConfiguration is a struct defined in:
>
https://github.com/gtaban/security/blob/master/Sources/ServerSecurity/TLSConfiguration.swift

>
> which stores TLS parameters that are needed to configure a TLS
connection. These include credentials (certificates and passwords) and
cipher suites.
>
>
> There is a corresponding change in PoCSocket/PoCSocketSimpleServer.swift
`start()` to pass in the configuration.
>
> The way that the proposed APIs would get uses can be seen in
Tests/HTTPTests/TLSServerTests.swift.
>
> let config = createCASignedTLSConfig()
>
> // HTTP
> try server.start(port: 0, handler: simpleHelloWebApp.handle)
>
> // HTTPS
> try server.start(port: 0, tls: config, handler: simpleHelloWebApp.handle)
>
>
> Regards,
> Gelareh
> _______________________________________________
> swift-server-dev mailing list
> swift-server-dev at swift.org
> https://lists.swift.org/mailman/listinfo/swift-server-dev

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