a15ff32608
Motivation: The initial buffer size used to decode HTTP objects is currently fixed at 128. This may be too small for some use cases and create a high amount of overhead associated with resizing/copying. The user should be able to configure the initial size as they please. Modifications: - Make HttpObjectDecoder's AppendableCharSequence initial size configurable Result: Users can more finely tune initial buffer size for increased performance or to save memory. Fixes https://github.com/netty/netty/issues/4807
101 lines
3.7 KiB
Java
101 lines
3.7 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.http;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelPipeline;
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import io.netty.handler.codec.TooLongFrameException;
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/**
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* Decodes {@link ByteBuf}s into {@link HttpRequest}s and {@link HttpContent}s.
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*
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* <h3>Parameters that prevents excessive memory consumption</h3>
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* <table border="1">
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* <tr>
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* <th>Name</th><th>Meaning</th>
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* </tr>
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* <tr>
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* <td>{@code maxInitialLineLength}</td>
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* <td>The maximum length of the initial line (e.g. {@code "GET / HTTP/1.0"})
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* If the length of the initial line exceeds this value, a
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* {@link TooLongFrameException} will be raised.</td>
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* </tr>
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* <tr>
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* <td>{@code maxHeaderSize}</td>
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* <td>The maximum length of all headers. If the sum of the length of each
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* header exceeds this value, a {@link TooLongFrameException} will be raised.</td>
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* </tr>
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* <tr>
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* <td>{@code maxChunkSize}</td>
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* <td>The maximum length of the content or each chunk. If the content length
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* exceeds this value, the transfer encoding of the decoded request will be
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* converted to 'chunked' and the content will be split into multiple
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* {@link HttpContent}s. If the transfer encoding of the HTTP request is
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* 'chunked' already, each chunk will be split into smaller chunks if the
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* length of the chunk exceeds this value. If you prefer not to handle
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* {@link HttpContent}s in your handler, insert {@link HttpObjectAggregator}
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* after this decoder in the {@link ChannelPipeline}.</td>
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* </tr>
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* </table>
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*/
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public class HttpRequestDecoder extends HttpObjectDecoder {
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/**
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* Creates a new instance with the default
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* {@code maxInitialLineLength (4096)}, {@code maxHeaderSize (8192)}, and
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* {@code maxChunkSize (8192)}.
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*/
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public HttpRequestDecoder() {
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}
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/**
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* Creates a new instance with the specified parameters.
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*/
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public HttpRequestDecoder(
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int maxInitialLineLength, int maxHeaderSize, int maxChunkSize) {
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super(maxInitialLineLength, maxHeaderSize, maxChunkSize, true);
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}
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public HttpRequestDecoder(
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int maxInitialLineLength, int maxHeaderSize, int maxChunkSize, boolean validateHeaders) {
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super(maxInitialLineLength, maxHeaderSize, maxChunkSize, true, validateHeaders);
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}
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public HttpRequestDecoder(
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int maxInitialLineLength, int maxHeaderSize, int maxChunkSize, boolean validateHeaders,
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int initialBufferSize) {
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super(maxInitialLineLength, maxHeaderSize, maxChunkSize, true, validateHeaders, initialBufferSize);
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}
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@Override
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protected HttpMessage createMessage(String[] initialLine) throws Exception {
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return new DefaultHttpRequest(
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HttpVersion.valueOf(initialLine[2]),
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HttpMethod.valueOf(initialLine[0]), initialLine[1], validateHeaders);
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}
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@Override
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protected HttpMessage createInvalidMessage() {
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return new DefaultFullHttpRequest(HttpVersion.HTTP_1_0, HttpMethod.GET, "/bad-request", validateHeaders);
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}
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@Override
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protected boolean isDecodingRequest() {
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return true;
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}
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}
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