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/* * Copyright (C) 2011 The Android Open Source Project */*from w w w.j ava 2 s. com*/ * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.squareup.okhttp.internal.spdy; import com.squareup.okhttp.internal.Platform; import com.squareup.okhttp.internal.Util; import java.io.ByteArrayOutputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.net.ProtocolException; import java.util.List; import java.util.zip.Deflater; final class Spdy3 implements Variant { static final int TYPE_DATA = 0x0; static final int TYPE_SYN_STREAM = 0x1; static final int TYPE_SYN_REPLY = 0x2; static final int TYPE_RST_STREAM = 0x3; static final int TYPE_SETTINGS = 0x4; static final int TYPE_NOOP = 0x5; static final int TYPE_PING = 0x6; static final int TYPE_GOAWAY = 0x7; static final int TYPE_HEADERS = 0x8; static final int TYPE_WINDOW_UPDATE = 0x9; static final int TYPE_CREDENTIAL = 0x10; static final int FLAG_FIN = 0x1; static final int FLAG_UNIDIRECTIONAL = 0x2; static final int VERSION = 3; static final byte[] DICTIONARY; static { try { DICTIONARY = ("\u0000\u0000\u0000\u0007options\u0000\u0000\u0000\u0004hea" + "d\u0000\u0000\u0000\u0004post\u0000\u0000\u0000\u0003put\u0000\u0000\u0000\u0006dele" + "te\u0000\u0000\u0000\u0005trace\u0000\u0000\u0000\u0006accept\u0000\u0000\u0000" + "\u000Eaccept-charset\u0000\u0000\u0000\u000Faccept-encoding\u0000\u0000\u0000\u000Fa" + "ccept-language\u0000\u0000\u0000\raccept-ranges\u0000\u0000\u0000\u0003age\u0000" + "\u0000\u0000\u0005allow\u0000\u0000\u0000\rauthorization\u0000\u0000\u0000\rcache-co" + "ntrol\u0000\u0000\u0000\nconnection\u0000\u0000\u0000\fcontent-base\u0000\u0000" + "\u0000\u0010content-encoding\u0000\u0000\u0000\u0010content-language\u0000\u0000" + "\u0000\u000Econtent-length\u0000\u0000\u0000\u0010content-location\u0000\u0000\u0000" + "\u000Bcontent-md5\u0000\u0000\u0000\rcontent-range\u0000\u0000\u0000\fcontent-type" + "\u0000\u0000\u0000\u0004date\u0000\u0000\u0000\u0004etag\u0000\u0000\u0000\u0006expe" + "ct\u0000\u0000\u0000\u0007expires\u0000\u0000\u0000\u0004from\u0000\u0000\u0000" + "\u0004host\u0000\u0000\u0000\bif-match\u0000\u0000\u0000\u0011if-modified-since" + "\u0000\u0000\u0000\rif-none-match\u0000\u0000\u0000\bif-range\u0000\u0000\u0000" + "\u0013if-unmodified-since\u0000\u0000\u0000\rlast-modified\u0000\u0000\u0000\blocati" + "on\u0000\u0000\u0000\fmax-forwards\u0000\u0000\u0000\u0006pragma\u0000\u0000\u0000" + "\u0012proxy-authenticate\u0000\u0000\u0000\u0013proxy-authorization\u0000\u0000" + "\u0000\u0005range\u0000\u0000\u0000\u0007referer\u0000\u0000\u0000\u000Bretry-after" + "\u0000\u0000\u0000\u0006server\u0000\u0000\u0000\u0002te\u0000\u0000\u0000\u0007trai" + "ler\u0000\u0000\u0000\u0011transfer-encoding\u0000\u0000\u0000\u0007upgrade\u0000" + "\u0000\u0000\nuser-agent\u0000\u0000\u0000\u0004vary\u0000\u0000\u0000\u0003via" + "\u0000\u0000\u0000\u0007warning\u0000\u0000\u0000\u0010www-authenticate\u0000\u0000" + "\u0000\u0006method\u0000\u0000\u0000\u0003get\u0000\u0000\u0000\u0006status\u0000" + "\u0000\u0000\u0006200 OK\u0000\u0000\u0000\u0007version\u0000\u0000\u0000\bHTTP/1.1" + "\u0000\u0000\u0000\u0003url\u0000\u0000\u0000\u0006public\u0000\u0000\u0000\nset-coo" + "kie\u0000\u0000\u0000\nkeep-alive\u0000\u0000\u0000\u0006origin100101201202205206300" + "302303304305306307402405406407408409410411412413414415416417502504505203 Non-Authori" + "tative Information204 No Content301 Moved Permanently400 Bad Request401 Unauthorized" + "403 Forbidden404 Not Found500 Internal Server Error501 Not Implemented503 Service Un" + "availableJan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec 00:00:00 Mon, Tue, Wed, Th" + "u, Fri, Sat, Sun, GMTchunked,text/html,image/png,image/jpg,image/gif,application/xml" + ",application/xhtml+xml,text/plain,text/javascript,publicprivatemax-age=gzip,deflate," + "sdchcharset=utf-8charset=iso-8859-1,utf-,*,enq=0.").getBytes(Util.UTF_8.name()); } catch (UnsupportedEncodingException e) { throw new AssertionError(); } } @Override public FrameReader newReader(InputStream in, boolean client) { return new Reader(in, client); } @Override public FrameWriter newWriter(OutputStream out, boolean client) { return new Writer(out, client); } /** Read spdy/3 frames. */ static final class Reader implements FrameReader { private final DataInputStream in; private final boolean client; private final NameValueBlockReader nameValueBlockReader; Reader(InputStream in, boolean client) { this.in = new DataInputStream(in); this.nameValueBlockReader = new NameValueBlockReader(in); this.client = client; } @Override public void readConnectionHeader() { } /** * Send the next frame to {@code handler}. Returns true unless there are no * more frames on the stream. */ @Override public boolean nextFrame(Handler handler) throws IOException { int w1; try { w1 = in.readInt(); } catch (IOException e) { return false; // This might be a normal socket close. } int w2 = in.readInt(); boolean control = (w1 & 0x80000000) != 0; int flags = (w2 & 0xff000000) >>> 24; int length = (w2 & 0xffffff); if (control) { int version = (w1 & 0x7fff0000) >>> 16; int type = (w1 & 0xffff); if (version != 3) { throw new ProtocolException("version != 3: " + version); } switch (type) { case TYPE_SYN_STREAM: readSynStream(handler, flags, length); return true; case TYPE_SYN_REPLY: readSynReply(handler, flags, length); return true; case TYPE_RST_STREAM: readRstStream(handler, flags, length); return true; case TYPE_SETTINGS: readSettings(handler, flags, length); return true; case TYPE_NOOP: if (length != 0) throw ioException("TYPE_NOOP length: %d != 0", length); handler.noop(); return true; case TYPE_PING: readPing(handler, flags, length); return true; case TYPE_GOAWAY: readGoAway(handler, flags, length); return true; case TYPE_HEADERS: readHeaders(handler, flags, length); return true; case TYPE_WINDOW_UPDATE: readWindowUpdate(handler, flags, length); return true; case TYPE_CREDENTIAL: Util.skipByReading(in, length); throw new UnsupportedOperationException("TODO"); // TODO: implement default: throw new IOException("Unexpected frame"); } } else { int streamId = w1 & 0x7fffffff; boolean inFinished = (flags & FLAG_FIN) != 0; handler.data(inFinished, streamId, in, length); return true; } } private void readSynStream(Handler handler, int flags, int length) throws IOException { int w1 = in.readInt(); int w2 = in.readInt(); int s3 = in.readShort(); int streamId = w1 & 0x7fffffff; int associatedStreamId = w2 & 0x7fffffff; int priority = (s3 & 0xe000) >>> 13; int slot = s3 & 0xff; List<String> nameValueBlock = nameValueBlockReader.readNameValueBlock(length - 10); boolean inFinished = (flags & FLAG_FIN) != 0; boolean outFinished = (flags & FLAG_UNIDIRECTIONAL) != 0; handler.headers(outFinished, inFinished, streamId, associatedStreamId, priority, nameValueBlock, HeadersMode.SPDY_SYN_STREAM); } private void readSynReply(Handler handler, int flags, int length) throws IOException { int w1 = in.readInt(); int streamId = w1 & 0x7fffffff; List<String> nameValueBlock = nameValueBlockReader.readNameValueBlock(length - 4); boolean inFinished = (flags & FLAG_FIN) != 0; handler.headers(false, inFinished, streamId, -1, -1, nameValueBlock, HeadersMode.SPDY_REPLY); } private void readRstStream(Handler handler, int flags, int length) throws IOException { if (length != 8) throw ioException("TYPE_RST_STREAM length: %d != 8", length); int streamId = in.readInt() & 0x7fffffff; int errorCodeInt = in.readInt(); ErrorCode errorCode = ErrorCode.fromSpdy3Rst(errorCodeInt); if (errorCode == null) { throw ioException("TYPE_RST_STREAM unexpected error code: %d", errorCodeInt); } handler.rstStream(streamId, errorCode); } private void readHeaders(Handler handler, int flags, int length) throws IOException { int w1 = in.readInt(); int streamId = w1 & 0x7fffffff; List<String> nameValueBlock = nameValueBlockReader.readNameValueBlock(length - 4); handler.headers(false, false, streamId, -1, -1, nameValueBlock, HeadersMode.SPDY_HEADERS); } private void readWindowUpdate(Handler handler, int flags, int length) throws IOException { if (length != 8) throw ioException("TYPE_WINDOW_UPDATE length: %d != 8", length); int w1 = in.readInt(); int w2 = in.readInt(); int streamId = w1 & 0x7fffffff; int deltaWindowSize = w2 & 0x7fffffff; handler.windowUpdate(streamId, deltaWindowSize, false); } private void readPing(Handler handler, int flags, int length) throws IOException { if (length != 4) throw ioException("TYPE_PING length: %d != 4", length); int id = in.readInt(); boolean reply = client == ((id % 2) == 1); handler.ping(reply, id, 0); } private void readGoAway(Handler handler, int flags, int length) throws IOException { if (length != 8) throw ioException("TYPE_GOAWAY length: %d != 8", length); int lastGoodStreamId = in.readInt() & 0x7fffffff; int errorCodeInt = in.readInt(); ErrorCode errorCode = ErrorCode.fromSpdyGoAway(errorCodeInt); if (errorCode == null) { throw ioException("TYPE_GOAWAY unexpected error code: %d", errorCodeInt); } handler.goAway(lastGoodStreamId, errorCode); } private void readSettings(Handler handler, int flags, int length) throws IOException { int numberOfEntries = in.readInt(); if (length != 4 + 8 * numberOfEntries) { throw ioException("TYPE_SETTINGS length: %d != 4 + 8 * %d", length, numberOfEntries); } Settings settings = new Settings(); for (int i = 0; i < numberOfEntries; i++) { int w1 = in.readInt(); int value = in.readInt(); int idFlags = (w1 & 0xff000000) >>> 24; int id = w1 & 0xffffff; settings.set(id, idFlags, value); } boolean clearPrevious = (flags & Settings.FLAG_CLEAR_PREVIOUSLY_PERSISTED_SETTINGS) != 0; handler.settings(clearPrevious, settings); } private static IOException ioException(String message, Object... args) throws IOException { throw new IOException(String.format(message, args)); } @Override public void close() throws IOException { Util.closeAll(in, nameValueBlockReader); } } /** Write spdy/3 frames. */ static final class Writer implements FrameWriter { private final DataOutputStream out; private final ByteArrayOutputStream nameValueBlockBuffer; private final DataOutputStream nameValueBlockOut; private final boolean client; Writer(OutputStream out, boolean client) { this.out = new DataOutputStream(out); this.client = client; Deflater deflater = new Deflater(); deflater.setDictionary(DICTIONARY); nameValueBlockBuffer = new ByteArrayOutputStream(); nameValueBlockOut = new DataOutputStream( Platform.get().newDeflaterOutputStream(nameValueBlockBuffer, deflater, true)); } @Override public synchronized void connectionHeader() { // Do nothing: no connection header for SPDY/3. } @Override public synchronized void flush() throws IOException { out.flush(); } @Override public synchronized void synStream(boolean outFinished, boolean inFinished, int streamId, int associatedStreamId, int priority, int slot, List<String> nameValueBlock) throws IOException { writeNameValueBlockToBuffer(nameValueBlock); int length = 10 + nameValueBlockBuffer.size(); int type = TYPE_SYN_STREAM; int flags = (outFinished ? FLAG_FIN : 0) | (inFinished ? FLAG_UNIDIRECTIONAL : 0); int unused = 0; out.writeInt(0x80000000 | (VERSION & 0x7fff) << 16 | type & 0xffff); out.writeInt((flags & 0xff) << 24 | length & 0xffffff); out.writeInt(streamId & 0x7fffffff); out.writeInt(associatedStreamId & 0x7fffffff); out.writeShort((priority & 0x7) << 13 | (unused & 0x1f) << 8 | (slot & 0xff)); nameValueBlockBuffer.writeTo(out); out.flush(); } @Override public synchronized void synReply( boolean outFinished, int streamId, List<String> nameValueBlock) throws IOException { writeNameValueBlockToBuffer(nameValueBlock); int type = TYPE_SYN_REPLY; int flags = (outFinished ? FLAG_FIN : 0); int length = nameValueBlockBuffer.size() + 4; out.writeInt(0x80000000 | (VERSION & 0x7fff) << 16 | type & 0xffff); out.writeInt((flags & 0xff) << 24 | length & 0xffffff); out.writeInt(streamId & 0x7fffffff); nameValueBlockBuffer.writeTo(out); out.flush(); } @Override public synchronized void headers(int streamId, List<String> nameValueBlock) throws IOException { writeNameValueBlockToBuffer(nameValueBlock); int flags = 0; int type = TYPE_HEADERS; int length = nameValueBlockBuffer.size() + 4; out.writeInt(0x80000000 | (VERSION & 0x7fff) << 16 | type & 0xffff); out.writeInt((flags & 0xff) << 24 | length & 0xffffff); out.writeInt(streamId & 0x7fffffff); nameValueBlockBuffer.writeTo(out); out.flush(); } @Override public synchronized void rstStream(int streamId, ErrorCode errorCode) throws IOException { if (errorCode.spdyRstCode == -1) throw new IllegalArgumentException(); int flags = 0; int type = TYPE_RST_STREAM; int length = 8; out.writeInt(0x80000000 | (VERSION & 0x7fff) << 16 | type & 0xffff); out.writeInt((flags & 0xff) << 24 | length & 0xffffff); out.writeInt(streamId & 0x7fffffff); out.writeInt(errorCode.spdyRstCode); out.flush(); } @Override public synchronized void data(boolean outFinished, int streamId, byte[] data) throws IOException { data(outFinished, streamId, data, 0, data.length); } @Override public synchronized void data(boolean outFinished, int streamId, byte[] data, int offset, int byteCount) throws IOException { int flags = (outFinished ? FLAG_FIN : 0); out.writeInt(streamId & 0x7fffffff); out.writeInt((flags & 0xff) << 24 | byteCount & 0xffffff); out.write(data, offset, byteCount); } private void writeNameValueBlockToBuffer(List<String> nameValueBlock) throws IOException { nameValueBlockBuffer.reset(); int numberOfPairs = nameValueBlock.size() / 2; nameValueBlockOut.writeInt(numberOfPairs); for (String s : nameValueBlock) { nameValueBlockOut.writeInt(s.length()); nameValueBlockOut.write(s.getBytes("UTF-8")); } nameValueBlockOut.flush(); } @Override public synchronized void settings(Settings settings) throws IOException { int type = TYPE_SETTINGS; int flags = 0; int size = settings.size(); int length = 4 + size * 8; out.writeInt(0x80000000 | (VERSION & 0x7fff) << 16 | type & 0xffff); out.writeInt((flags & 0xff) << 24 | length & 0xffffff); out.writeInt(size); for (int i = 0; i <= Settings.COUNT; i++) { if (!settings.isSet(i)) continue; int settingsFlags = settings.flags(i); out.writeInt((settingsFlags & 0xff) << 24 | (i & 0xffffff)); out.writeInt(settings.get(i)); } out.flush(); } @Override public synchronized void noop() throws IOException { int type = TYPE_NOOP; int length = 0; int flags = 0; out.writeInt(0x80000000 | (VERSION & 0x7fff) << 16 | type & 0xffff); out.writeInt((flags & 0xff) << 24 | length & 0xffffff); out.flush(); } @Override public synchronized void ping(boolean reply, int payload1, int payload2) throws IOException { boolean payloadIsReply = client != ((payload1 % 2) == 1); if (reply != payloadIsReply) throw new IllegalArgumentException("payload != reply"); int type = TYPE_PING; int flags = 0; int length = 4; out.writeInt(0x80000000 | (VERSION & 0x7fff) << 16 | type & 0xffff); out.writeInt((flags & 0xff) << 24 | length & 0xffffff); out.writeInt(payload1); out.flush(); } @Override public synchronized void goAway(int lastGoodStreamId, ErrorCode errorCode) throws IOException { if (errorCode.spdyGoAwayCode == -1) throw new IllegalArgumentException(); int type = TYPE_GOAWAY; int flags = 0; int length = 8; out.writeInt(0x80000000 | (VERSION & 0x7fff) << 16 | type & 0xffff); out.writeInt((flags & 0xff) << 24 | length & 0xffffff); out.writeInt(lastGoodStreamId); out.writeInt(errorCode.spdyGoAwayCode); out.flush(); } @Override public synchronized void windowUpdate(int streamId, int deltaWindowSize) throws IOException { int type = TYPE_WINDOW_UPDATE; int flags = 0; int length = 8; out.writeInt(0x80000000 | (VERSION & 0x7fff) << 16 | type & 0xffff); out.writeInt((flags & 0xff) << 24 | length & 0xffffff); out.writeInt(streamId); out.writeInt(deltaWindowSize); out.flush(); } @Override public void close() throws IOException { Util.closeAll(out, nameValueBlockOut); } } }