--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/hpack/StringReader.java	Tue Apr 17 08:54:17 2018 -0700
@@ -0,0 +1,114 @@
+/*
+ * 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 jdk.internal.net.http.hpack;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+
+//
+//          0   1   2   3   4   5   6   7
+//        +---+---+---+---+---+---+---+---+
+//        | H |    String Length (7+)     |
+//        +---+---------------------------+
+//        |  String Data (Length octets)  |
+//        +-------------------------------+
+//
+final class StringReader {
+
+    private static final int NEW             = 0;
+    private static final int FIRST_BYTE_READ = 1;
+    private static final int LENGTH_READ     = 2;
+    private static final int DONE            = 4;
+
+    private final IntegerReader intReader = new IntegerReader();
+    private final Huffman.Reader huffmanReader = new Huffman.Reader();
+    private final ISO_8859_1.Reader plainReader = new ISO_8859_1.Reader();
+
+    private int state = NEW;
+
+    private boolean huffman;
+    private int remainingLength;
+
+    boolean read(ByteBuffer input, Appendable output) throws IOException {
+        if (state == DONE) {
+            return true;
+        }
+        if (!input.hasRemaining()) {
+            return false;
+        }
+        if (state == NEW) {
+            int p = input.position();
+            huffman = (input.get(p) & 0b10000000) != 0;
+            state = FIRST_BYTE_READ;
+            intReader.configure(7);
+        }
+        if (state == FIRST_BYTE_READ) {
+            boolean lengthRead = intReader.read(input);
+            if (!lengthRead) {
+                return false;
+            }
+            remainingLength = intReader.get();
+            state = LENGTH_READ;
+        }
+        if (state == LENGTH_READ) {
+            boolean isLast = input.remaining() >= remainingLength;
+            int oldLimit = input.limit();
+            if (isLast) {
+                input.limit(input.position() + remainingLength);
+            }
+            remainingLength -= Math.min(input.remaining(), remainingLength);
+            if (huffman) {
+                huffmanReader.read(input, output, isLast);
+            } else {
+                plainReader.read(input, output);
+            }
+            if (isLast) {
+                input.limit(oldLimit);
+                state = DONE;
+            }
+            return isLast;
+        }
+        throw new InternalError(Arrays.toString(
+                new Object[]{state, huffman, remainingLength}));
+    }
+
+    boolean isHuffmanEncoded() {
+        if (state < FIRST_BYTE_READ) {
+            throw new IllegalStateException("Has not been fully read yet");
+        }
+        return huffman;
+    }
+
+    void reset() {
+        if (huffman) {
+            huffmanReader.reset();
+        } else {
+            plainReader.reset();
+        }
+        intReader.reset();
+        state = NEW;
+    }
+}