8262294: java/net/httpclient/ProxyAuthDisabledSchemes.java fails with HTTP/1.1 parser received no bytes

Reviewed-by: dfuchs, jpai

src/java.net.http/share/classes/jdk/internal/net/http/Exchange.java

@@ -533,7 +533,7 @@ final class Exchange<T> {
         Function<ExchangeImpl<T>, CompletableFuture<Response>> after407Check;
         bodyIgnored = null;
         if (request.expectContinue()) {
-            request.addSystemHeader("Expect", "100-Continue");
+            request.setSystemHeader("Expect", "100-Continue");
             Log.logTrace("Sending Expect: 100-Continue");
             // wait for 100-Continue before sending body
             after407Check = this::expectContinue;

src/java.net.http/share/classes/jdk/internal/net/http/HttpRequestImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -360,10 +360,6 @@ public class HttpRequestImpl extends HttpRequest implements WebSocketRequest {
     @Override
     public Optional<HttpClient.Version> version() { return version; }
 
-    void addSystemHeader(String name, String value) {
-        systemHeadersBuilder.addHeader(name, value);
-    }
-
     @Override
     public void setSystemHeader(String name, String value) {
         systemHeadersBuilder.setHeader(name, value);

test/jdk/java/net/httpclient/DigestEchoServer.java

@@ -699,6 +699,7 @@ public abstract class DigestEchoServer implements HttpServerAdapters {
                         throw new InternalError(key + ": Invalid combination scheme="
                              + schemeType + " authType=" + authType);
                 }
+                break;
             case NONE:
                 // No authentication at all.
                 ctxt.addFilter(new HttpNoAuthFilter(key, authType));

test/jdk/java/net/httpclient/ProxyAuthDisabledSchemes.java

@@ -27,7 +27,7 @@
  *          headers directly when connecting with a server, and
  *          it verifies that the client honor the jdk.http.auth.*.disabledSchemes
  *          net properties.
- * @bug 8087112
+ * @bug 8087112 8262294
  * @library /test/lib /test/jdk/java/net/httpclient/lib
  * @build jdk.test.lib.net.SimpleSSLContext DigestEchoServer DigestEchoClient
  *        ReferenceTracker ProxyAuthDisabledSchemes