Apache Enginge: Auth scheme may not be null

[F3adlz]

Ktor Version and Engine Used (client or server and name)
io.ktor:ktor-client-apache:1.2.3-rc
io.ktor:ktor-client-apache:1.2.2
org.apache.httpcomponents:httpasyncclient:4.1.3

Describe the bug
When using Ktor http client with http proxy (with basic auth), some of requests to https web sites are failing with "java.lang.IllegalArgumentException: Auth scheme may not be null":

java.lang.IllegalArgumentException: Auth scheme may not be null

	at |b|b|b(Coroutine boundary.|b(|b)
	at io.ktor.client.engine.apache.ApacheEngine.execute(ApacheEngine.kt:23)
	at io.ktor.client.engine.HttpClientEngine$install$1.invokeSuspend(HttpClientEngine.kt:49)
	at io.ktor.client.features.logging.Logging$Companion$install$1.invokeSuspend(Logging.kt:151)
	at io.ktor.client.features.HttpSend$DefaultSender.execute(HttpSend.kt:90)
	at io.ktor.client.features.HttpSend$Feature$install$1.invokeSuspend(HttpSend.kt:62)
	at io.ktor.client.features.HttpCallValidator$Companion$install$1.invokeSuspend(HttpCallValidator.kt:87)
	at io.ktor.client.HttpClient.execute(HttpClient.kt:141)
	at io.ktor.client.call.HttpClientCallKt.call(HttpClientCall.kt:140)
	at t.p.s.f.BugReportTest$getNested$2$1$1.invokeSuspend(BugReportTest.kt:59)
	at t.p.s.f.BugReportTest$testClient$1$1$1.invokeSuspend(BugReportTest.kt:83)
Caused by: java.lang.IllegalArgumentException: Auth scheme may not be null
	at org.apache.http.util.Args.notNull(Args.java:54)
	at org.apache.http.impl.client.AuthenticationStrategyImpl.authSucceeded(AuthenticationStrategyImpl.java:215)
	at org.apache.http.impl.client.ProxyAuthenticationStrategy.authSucceeded(ProxyAuthenticationStrategy.java:44)
	at org.apache.http.impl.auth.HttpAuthenticator.isAuthenticationRequested(HttpAuthenticator.java:88)
	at org.apache.http.impl.nio.client.MainClientExec.needAuthentication(MainClientExec.java:629)
	at org.apache.http.impl.nio.client.MainClientExec.handleResponse(MainClientExec.java:569)
	at org.apache.http.impl.nio.client.MainClientExec.responseReceived(MainClientExec.java:309)
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.responseReceived(DefaultClientExchangeHandlerImpl.java:151)
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.responseReceived(HttpAsyncRequestExecutor.java:306)
	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:255)
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:81)
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:39)
	at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:121)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)
	at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:588)
	at java.lang.Thread.run(Thread.java:748)

To Reproduce
Steps to reproduce the behavior:

1. Run following test with http proxy (with basic auth) BugReportTest. Number of parallel requests until exception may differ.

Expected behavior
No errors or exceptions occurred.

[e5l]

Hi @F3adlz, thanks for the report.
It looks like you handle cookies and Auth inside the Apache configuration, so ktor can't do anything with that.

Btw maybe ktor auth feature could fix this problem https://ktor.io/clients/http-client/features/auth.html ?

[F3adlz]

@e5l, thanks for suggestion, but does it work for proxy authentication? Because i've got io.ktor.client.features.ClientRequestException: Client request(https://jsonplaceholder.typicode.com/) invalid: 407 Proxy Authentication Required using Auth feature and setting proxy server address in Apache configuration.

[F3adlz]

Related issue with proxy authentication #760

[e5l]

This issue is inside of the apache-async-httpclient library. I made the separate issue for proxy Auth in multiplatform: #1923

Closed.