HTTP Proxy TODOs

[jbescos]

#7143

• Support it in HTTP 2 (Tomas already did it, but I added tests)
• Support Proxy HTTP authentication
• Proxy keep alive headers
• Some proxies respond with HTTP 1.0 protocol and Http1StatusParser will fail
• HTTP CONNECT should specify the host:port of the remote (not the proxy)
  In my opinion, it makes no sense because the header HOST is mandatory and it contains the remote host:port, but you can try it by yourself configuring a proxy in your browser. For example when you visit youtube you will see the next:

CONNECT www.youtube.com:443 HTTP/1.1
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:108.0) Gecko/20100101 Firefox/108.0
Proxy-Connection: keep-alive
Connection: keep-alive
Host: www.youtube.com:443

Some proxies could not work properly if the CONNECT is not set correctly.

[jbescos]

I am sniffing how does it work the authentication using Spotify as a client, and it is unsecure.

The CONNECT is always HTTP so it is possible to see exactly what is sent in any of the network nodes. The authentication is sent as basic authentication in this way:

CONNECT ap-gew1.spotify.com:4070 HTTP/1.1
Host: ap-gew1.spotify.com:4070
Proxy-Authorization: Basic amJlc2Nvczp0ZXN0

Anybody sniffing the network will see that user:password is jbescos:test

[tomas-langer]

Basic authentication is terrible, but if required, we must support it.

[tomas-langer]

You can just inject the clients into constructor parameters:

AuthHttpProxyTest(Http1Client http1Client, Http2Client http2Client)

and they will be initialized to the host and port of the server

[jbescos]

I am getting:

[ERROR] io.helidon.nima.tests.integration.webclient.AuthHttpProxyTest.testUserPasswordNotCorrect1  Time elapsed: 0 s  <<< ERROR!
org.junit.jupiter.api.extension.ParameterResolutionException: No ParameterResolver registered for parameter [io.helidon.nima.http2.webclient.Http2Client arg1] in constructor [io.helidon.nima.tests.integration.webclient.AuthHttpProxyTest(io.helidon.nima.webclient.http1.Http1Client,io.helidon.nima.http2.webclient.Http2Client)].
	at org.junit.jupiter.engine.execution.ParameterResolutionUtils.resolveParameter(ParameterResolutionUtils.java:120)
	at org.junit.jupiter.engine.execution.ParameterResolutionUtils.resolveParameters(ParameterResolutionUtils.java:103)
	at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker.invoke(InterceptingExecutableInvoker.java:59)
	at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestClassConstructor(ClassBasedTestDescriptor.java:363)

[tomas-langer]

please add the http2 testing support as well

[tomas-langer]

        <dependency>
            <groupId>io.helidon.nima.testing.junit5</groupId>
            <artifactId>helidon-nima-testing-junit5-http2</artifactId>
            <scope>test</scope>
        </dependency>