8accc52b03
Motivation: The twitter hpack project does not have the support that it used to have. See discussion here: https://github.com/netty/netty/issues/4403. Modifications: Created a new module in Netty and copied the latest from twitter hpack master. Result: Netty no longer depends on twitter hpack.
149 lines
5.6 KiB
Java
149 lines
5.6 KiB
Java
/*
|
|
* Copyright 2014 The Netty Project
|
|
*
|
|
* The Netty Project licenses this file to you 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 io.netty.handler.codec.http2;
|
|
|
|
import io.netty.buffer.ByteBuf;
|
|
import io.netty.buffer.ByteBufInputStream;
|
|
import io.netty.handler.codec.http2.hpack.Decoder;
|
|
import io.netty.handler.codec.http2.hpack.HeaderListener;
|
|
import io.netty.util.AsciiString;
|
|
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
|
|
import static io.netty.handler.codec.http2.Http2CodecUtil.DEFAULT_HEADER_TABLE_SIZE;
|
|
import static io.netty.handler.codec.http2.Http2CodecUtil.DEFAULT_MAX_HEADER_SIZE;
|
|
import static io.netty.handler.codec.http2.Http2Error.COMPRESSION_ERROR;
|
|
import static io.netty.handler.codec.http2.Http2Error.ENHANCE_YOUR_CALM;
|
|
import static io.netty.handler.codec.http2.Http2Error.INTERNAL_ERROR;
|
|
import static io.netty.handler.codec.http2.Http2Error.PROTOCOL_ERROR;
|
|
import static io.netty.handler.codec.http2.Http2Exception.connectionError;
|
|
|
|
public class DefaultHttp2HeadersDecoder implements Http2HeadersDecoder, Http2HeadersDecoder.Configuration {
|
|
private final int maxHeaderSize;
|
|
private final Decoder decoder;
|
|
private final Http2HeaderTable headerTable;
|
|
private final boolean validateHeaders;
|
|
|
|
public DefaultHttp2HeadersDecoder() {
|
|
this(true);
|
|
}
|
|
|
|
public DefaultHttp2HeadersDecoder(boolean validateHeaders) {
|
|
this(DEFAULT_MAX_HEADER_SIZE, DEFAULT_HEADER_TABLE_SIZE, validateHeaders);
|
|
}
|
|
|
|
public DefaultHttp2HeadersDecoder(int maxHeaderSize, int maxHeaderTableSize) {
|
|
this(maxHeaderSize, maxHeaderTableSize, true);
|
|
}
|
|
|
|
public DefaultHttp2HeadersDecoder(int maxHeaderSize, int maxHeaderTableSize, boolean validateHeaders) {
|
|
if (maxHeaderSize <= 0) {
|
|
throw new IllegalArgumentException("maxHeaderSize must be positive: " + maxHeaderSize);
|
|
}
|
|
decoder = new Decoder(maxHeaderSize, maxHeaderTableSize);
|
|
headerTable = new Http2HeaderTableDecoder();
|
|
this.maxHeaderSize = maxHeaderSize;
|
|
this.validateHeaders = validateHeaders;
|
|
}
|
|
|
|
@Override
|
|
public Http2HeaderTable headerTable() {
|
|
return headerTable;
|
|
}
|
|
|
|
@Override
|
|
public int maxHeaderSize() {
|
|
return maxHeaderSize;
|
|
}
|
|
|
|
@Override
|
|
public Configuration configuration() {
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Respond to headers block resulting in the maximum header size being exceeded.
|
|
* @throws Http2Exception If we can not recover from the truncation.
|
|
*/
|
|
protected void maxHeaderSizeExceeded() throws Http2Exception {
|
|
throw connectionError(ENHANCE_YOUR_CALM, "Header size exceeded max allowed bytes (%d)", maxHeaderSize);
|
|
}
|
|
|
|
@Override
|
|
public Http2Headers decodeHeaders(ByteBuf headerBlock) throws Http2Exception {
|
|
InputStream in = new ByteBufInputStream(headerBlock);
|
|
try {
|
|
final Http2Headers headers = new DefaultHttp2Headers(validateHeaders);
|
|
HeaderListener listener = new HeaderListener() {
|
|
@Override
|
|
public void addHeader(byte[] key, byte[] value, boolean sensitive) {
|
|
headers.add(new AsciiString(key, false), new AsciiString(value, false));
|
|
}
|
|
};
|
|
|
|
decoder.decode(in, listener);
|
|
if (decoder.endHeaderBlock()) {
|
|
maxHeaderSizeExceeded();
|
|
}
|
|
|
|
if (headers.size() > headerTable.maxHeaderListSize()) {
|
|
throw connectionError(PROTOCOL_ERROR, "Number of headers (%d) exceeds maxHeaderListSize (%d)",
|
|
headers.size(), headerTable.maxHeaderListSize());
|
|
}
|
|
|
|
return headers;
|
|
} catch (IOException e) {
|
|
throw connectionError(COMPRESSION_ERROR, e, e.getMessage());
|
|
} catch (Http2Exception e) {
|
|
throw e;
|
|
} catch (Throwable e) {
|
|
// Default handler for any other types of errors that may have occurred. For example,
|
|
// the the Header builder throws IllegalArgumentException if the key or value was invalid
|
|
// for any reason (e.g. the key was an invalid pseudo-header).
|
|
throw connectionError(COMPRESSION_ERROR, e, e.getMessage());
|
|
} finally {
|
|
try {
|
|
in.close();
|
|
} catch (IOException e) {
|
|
throw connectionError(INTERNAL_ERROR, e, e.getMessage());
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@link Http2HeaderTable} implementation to support {@link Http2HeadersDecoder}
|
|
*/
|
|
private final class Http2HeaderTableDecoder extends DefaultHttp2HeaderTableListSize implements Http2HeaderTable {
|
|
@Override
|
|
public void maxHeaderTableSize(int max) throws Http2Exception {
|
|
if (max < 0) {
|
|
throw connectionError(PROTOCOL_ERROR, "Header Table Size must be non-negative but was %d", max);
|
|
}
|
|
try {
|
|
decoder.setMaxHeaderTableSize(max);
|
|
} catch (Throwable t) {
|
|
throw connectionError(PROTOCOL_ERROR, t.getMessage(), t);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int maxHeaderTableSize() {
|
|
return decoder.getMaxHeaderTableSize();
|
|
}
|
|
}
|
|
}
|