* Respect the Keep-Alive response header on HTTP/1.1 as well

* Add some more comments

* No end stream on ws connect and flush every message

* Apply suggestions from code review
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>

* Await flush in web socket after write

* Flush for web socket tests should be supported

* feedback

* Refactoring write and flush tasks in WebSocket

* feedback

* Replace check for more generic extended connect

* Apply suggestions from code review
Co-authored-by: NStephen Toub <stoub@microsoft.com>

* feedback
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>
Co-authored-by: NStephen Toub <stoub@microsoft.com>

[Android][iOS] Enable HttpClientHandler.DangerousAcceptAnyServerCertificateValidator when using native handlers (#73763)

The static `HttpClientHandler.DangerousAcceptAnyServerCertificateValidator` getter throws PNSE when the native HTTP handler is enabled because Xamarin.Android's `AndroidMessageHandler` and Xamarin.iOS `NSUrlSessionHandler` didn't use to have support for the `ServerCertificateCustomValidationCallback`.

We already implemented the Android part in .NET 6 and support in the iOS implementation is WIP and we should be able to implement it in time for .NET 7. IMO it's safe to remove the exception in the getter in .NET 7.

Closes #68898

* Handle HTTP3 server closing its controls stream

* React to server closing inbound control stream

* Update src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/Http3Connection.cs
Co-authored-by: NMarie Píchová <11718369+ManickaP@users.noreply.github.com>
Co-authored-by: NMarie Píchová <11718369+ManickaP@users.noreply.github.com>

* Improved server logging to include S.N.Quic traces as well.

* MsQuicBuffers copy given memory into native instead of pinning

* Process incoming frames before sending frames for Http2Connection.

Moves the ProcessIncomingFramesAsync method before sending the preface.
This fixes a deadlock when using a NamedPipe as a transport where
incoming frames need to be read before being able to write.
Also rename _expectingSettingsAck to _receivedSettingsAck to clearly
specify that the settings frame has being received.

Fix #73097

* Addressed PR Feedback.

Added test that will prevent regresions when using Http2 with NamedPipe as a transport.
Addressed PR Feedback

Fix #73307

* Update ConnectCallback_UseNamedPipe_Success test

Fix #73307

* Moved ConnectCallback_UseNamedPipe_Success test to
SocketsHttpHandlerTest_ConnectCallback_Http2 class

Fix #73307
Co-authored-by: NDaniel Espinosa <luespino@microsoft.com>

* Fix sending end stream for websocket over H/2

* feedback

* Update src/libraries/System.Net.WebSockets.Client/tests/SendReceiveTest.Http2.cs
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>

* default usessl in tests

* Update src/libraries/System.Net.WebSockets.Client/tests/ConnectTest.Http2.cs
Co-authored-by: NStephen Toub <stoub@microsoft.com>

* disable new tests on browser because sockets not supported
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>
Co-authored-by: NStephen Toub <stoub@microsoft.com>

* increase timeout on ZeroByteRead_IssuesZeroByteReadOnUnderlyingStream test'

* feedback from review

* feedback from review

Disable System.Net.Http.Functional.Tests.SocketsHttpHandler_Cancellation_Test_NonParallel.CancelPendingRequest_DropsStalledConnectionAttempt on Linux (#73300)

* Respect the Keep-Alive response header on HTTP/1.0

* Remove TimeoutOffset

* Update Trace message

* Update tests

* Adjust test timeouts

* #56876 issue test

* Implemented Alt-Used compliance

* resolved code review

* changed variable name

* removed white spaces

* Update src/libraries/System.Net.Http/tests/FunctionalTests/HttpClientHandlerTest.Http3.cs
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>

* Update src/libraries/System.Net.Http/tests/FunctionalTests/HttpClientHandlerTest.Http3.cs
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>
Co-authored-by: Niuliaco <t-icorcodel@microsoft.com>
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>

* Fix race when receiving HEADERS and RST_STREAM in rapid succession.

* Improve test

* Add missing System.Net docs

* Address PR feedback

* Update src/libraries/System.Net.Http/src/System/Net/Http/Headers/MediaTypeHeaderValue.cs
Co-authored-by: NRadek Zikmund <32671551+rzikm@users.noreply.github.com>
Co-authored-by: NRadek Zikmund <32671551+rzikm@users.noreply.github.com>

Resolves #66297

* Remove Http3RequestStream from _activeRequest when response is read/aborted.

* Add time limit in test

* Wait for both sides to be completed

* Code review feedback

* TryAddWithoutValidation ViaHeaderValue

* checking for 0

* Avoid some unnecessary static readonly arrays

* Address PR feedback

* Address PR feedback

nameof can now be used in attributes on and in method signatures to refer to parameter names in the same signature.

* [#70949 issue] Made test and added inner exception for uninformative
message

* Apply suggestions from code review
Co-authored-by: NMarie Píchová <11718369+ManickaP@users.noreply.github.com>
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>

* Solving the rest of the coding review

* Update src/libraries/System.Net.Http/tests/FunctionalTests/HttpClientHandlerTest.Http3.cs
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>
Co-authored-by: Niuliaco <t-icorcodel@microsoft.com>
Co-authored-by: NMarie Píchová <11718369+ManickaP@users.noreply.github.com>
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>

Access _authorityExpireTimer and _altSvcBlocklistTimerCancellation under lock and check for disposed.

Fixes #66782.

Disable long running ReadAsync_CancelPendingTask_ThrowsCancellationException tests for some Http1 cases (#72596)

* Implement IncludeNetworkSecurityConfig

* Use IncludeNetworkSecurityConfig

* Fix tests

* Remove active issue attributes

* Rename certificate file

* Revert unnecessary changes

* TMP: re-throw caught exception to reveal more information in logs

* Revert "TMP: re-throw caught exception to reveal more information in logs"

This reverts commit 039d051d6ac60c1c3f1baf37b0c06872f87cac84.

* TMP: add and update res folders until they are merged into runtime-assets

* Fix System.Net.Requests tests

* Re-enable System.Net.Http functional tests

* Try fixing failing test

* Skip failing test

* Add missing using

* Remove temporary test data

* Relax exception type assertion for Android

* Code cleanup

* Fix test failures in System.Net.WebSockets.Client.Tests

* Remove active issue attribute

* Remove most explicit usages of the server certificate custom validation callback in tests

* Fix several tests

* Remove weird condition

* Code clean-up

* Remove unrelated active issue attributes

* Turn ActiveIssue attributes into permanent SkipOnPlatform

* Update explanation for SkipOnPlatform

* Revert partial fix and keep active issue

* Keep active issue for android x64 and x86

* Remove invalid attribute

* Fix test on Browser

* Allow all certificates by default

* Fix build

* Fix http client handler factory on Browser

* Skip failing test

* Fix net48 build

* Revert unintentional change in WinHttpHandler tests

* Avoid using unsupported property on Browser

* Remove unnecessary default value

* Avoid using unsupported property on Browser

* Avoid adding an HttpClient.Timeout message to ConnectTimeout exceptions

* Avoid wrapping unknown OCEs as well

* Update comment
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>
Co-authored-by: NNatalia Kondratyeva <knatalia@microsoft.com>

* fix assert in ssl options clone

* add CertificateChainPolicy

* remove extra assert

* Fix typos

* Cleanup trailing whitespaces in committed files

* Revert a macro for win32 compat

* Disambiguate test data method

* Revert XMLPath test which rely on external assets

* Revert whitespace change in Xml tests

* Revert ClrEtwAl and ILLink.Shared

* Revert crossgen2 props/targets and *.wxl

This package was used historically to distribute EventSource fixes out-of-band but
is no longer needed. This change removed the project and the ES_BUILD_STANDALONE
ifdef which was only defined when the project was building.

Fixes #71231