--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.net.http/share/classes/java/net/http/internal/hpack/ISO_8859_1.java	Wed Feb 07 14:17:24 2018 +0000
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2015, 2018, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package java.net.http.internal.hpack;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+//
+// Custom implementation of ISO/IEC 8859-1:1998
+//
+// The rationale behind this is not to deal with CharsetEncoder/CharsetDecoder,
+// basically because it would require wrapping every single CharSequence into a
+// CharBuffer and then copying it back.
+//
+// But why not to give a CharBuffer instead of Appendable? Because I can choose
+// an Appendable (e.g. StringBuilder) that adjusts its length when needed and
+// therefore not to deal with pre-sized CharBuffers or copying.
+//
+// The encoding is simple and well known: 1 byte <-> 1 char
+//
+final class ISO_8859_1 {
+
+    private ISO_8859_1() { }
+
+    public static final class Reader {
+
+        public void read(ByteBuffer source, Appendable destination)
+                throws IOException {
+            for (int i = 0, len = source.remaining(); i < len; i++) {
+                char c = (char) (source.get() & 0xff);
+                try {
+                    destination.append(c);
+                } catch (IOException e) {
+                    throw new IOException(
+                            "Error appending to the destination", e);
+                }
+            }
+        }
+
+        public Reader reset() {
+            return this;
+        }
+    }
+
+    public static final class Writer {
+
+        private CharSequence source;
+        private int pos;
+        private int end;
+
+        public Writer configure(CharSequence source, int start, int end) {
+            this.source = source;
+            this.pos = start;
+            this.end = end;
+            return this;
+        }
+
+        public boolean write(ByteBuffer destination) {
+            for (; pos < end; pos++) {
+                char c = source.charAt(pos);
+                if (c > '\u00FF') {
+                    throw new IllegalArgumentException(
+                            "Illegal ISO-8859-1 char: " + (int) c);
+                }
+                if (destination.hasRemaining()) {
+                    destination.put((byte) c);
+                } else {
+                    return false;
+                }
+            }
+            return true;
+        }
+
+        public Writer reset() {
+            source = null;
+            pos = -1;
+            end = -1;
+            return this;
+        }
+    }
+}