133 lines
3.9 KiB
Java
133 lines
3.9 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.buffer.Unpooled;
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import io.netty.handler.codec.DefaultHeaders.NameValidator;
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import io.netty.util.internal.StringUtil;
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import java.util.Map.Entry;
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/**
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* The default {@link LastHttpContent} implementation.
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*/
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public class DefaultLastHttpContent extends DefaultHttpContent implements LastHttpContent {
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private final HttpHeaders trailingHeaders;
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private final boolean validateHeaders;
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public DefaultLastHttpContent() {
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this(Unpooled.buffer(0));
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}
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public DefaultLastHttpContent(ByteBuf content) {
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this(content, true);
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}
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public DefaultLastHttpContent(ByteBuf content, boolean validateHeaders) {
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super(content);
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trailingHeaders = new TrailingHttpHeaders(validateHeaders);
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this.validateHeaders = validateHeaders;
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}
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@Override
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public LastHttpContent copy() {
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return replace(content().copy());
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}
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@Override
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public LastHttpContent duplicate() {
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return replace(content().duplicate());
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}
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@Override
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public LastHttpContent retainedDuplicate() {
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return replace(content().retainedDuplicate());
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}
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@Override
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public LastHttpContent replace(ByteBuf content) {
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final DefaultLastHttpContent dup = new DefaultLastHttpContent(content, validateHeaders);
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dup.trailingHeaders().set(trailingHeaders());
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return dup;
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}
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@Override
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public LastHttpContent retain(int increment) {
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super.retain(increment);
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return this;
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}
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@Override
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public LastHttpContent retain() {
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super.retain();
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return this;
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}
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@Override
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public LastHttpContent touch() {
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super.touch();
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return this;
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}
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@Override
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public LastHttpContent touch(Object hint) {
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super.touch(hint);
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return this;
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}
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@Override
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public HttpHeaders trailingHeaders() {
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return trailingHeaders;
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}
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@Override
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public String toString() {
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StringBuilder buf = new StringBuilder(super.toString());
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buf.append(StringUtil.NEWLINE);
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appendHeaders(buf);
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// Remove the last newline.
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buf.setLength(buf.length() - StringUtil.NEWLINE.length());
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return buf.toString();
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}
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private void appendHeaders(StringBuilder buf) {
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for (Entry<String, String> e : trailingHeaders()) {
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buf.append(e.getKey());
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buf.append(": ");
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buf.append(e.getValue());
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buf.append(StringUtil.NEWLINE);
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}
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}
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private static final class TrailingHttpHeaders extends DefaultHttpHeaders {
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private static final NameValidator<CharSequence> TrailerNameValidator = name -> {
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DefaultHttpHeaders.HttpNameValidator.validateName(name);
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if (HttpHeaderNames.CONTENT_LENGTH.contentEqualsIgnoreCase(name)
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|| HttpHeaderNames.TRANSFER_ENCODING.contentEqualsIgnoreCase(name)
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|| HttpHeaderNames.TRAILER.contentEqualsIgnoreCase(name)) {
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throw new IllegalArgumentException("prohibited trailing header: " + name);
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}
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};
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@SuppressWarnings({ "unchecked" })
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TrailingHttpHeaders(boolean validate) {
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super(validate, validate ? TrailerNameValidator : NameValidator.NOT_NULL);
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}
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}
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}
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