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DefaultLastHttpContent.java
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DefaultLastHttpContent.java
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/*
* Copyright 2012 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.http;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.DefaultHeaders.NameValidator;
import io.netty.util.internal.StringUtil;
import java.util.Map.Entry;
/**
* The default {@link LastHttpContent} implementation.
*/
public class DefaultLastHttpContent extends DefaultHttpContent implements LastHttpContent {
private final HttpHeaders trailingHeaders;
private final boolean validateHeaders;
public DefaultLastHttpContent() {
this(Unpooled.buffer(0));
}
public DefaultLastHttpContent(ByteBuf content) {
this(content, true);
}
public DefaultLastHttpContent(ByteBuf content, boolean validateHeaders) {
super(content);
trailingHeaders = new TrailingHttpHeaders(validateHeaders);
this.validateHeaders = validateHeaders;
}
@Override
public LastHttpContent copy() {
return replace(content().copy());
}
@Override
public LastHttpContent duplicate() {
return replace(content().duplicate());
}
@Override
public LastHttpContent retainedDuplicate() {
return replace(content().retainedDuplicate());
}
@Override
public LastHttpContent replace(ByteBuf content) {
final DefaultLastHttpContent dup = new DefaultLastHttpContent(content, validateHeaders);
dup.trailingHeaders().set(trailingHeaders());
return dup;
}
@Override
public LastHttpContent retain(int increment) {
super.retain(increment);
return this;
}
@Override
public LastHttpContent retain() {
super.retain();
return this;
}
@Override
public LastHttpContent touch() {
super.touch();
return this;
}
@Override
public LastHttpContent touch(Object hint) {
super.touch(hint);
return this;
}
@Override
public HttpHeaders trailingHeaders() {
return trailingHeaders;
}
@Override
public String toString() {
StringBuilder buf = new StringBuilder(super.toString());
buf.append(StringUtil.NEWLINE);
appendHeaders(buf);
// Remove the last newline.
buf.setLength(buf.length() - StringUtil.NEWLINE.length());
return buf.toString();
}
private void appendHeaders(StringBuilder buf) {
for (Entry<String, String> e : trailingHeaders()) {
buf.append(e.getKey());
buf.append(": ");
buf.append(e.getValue());
buf.append(StringUtil.NEWLINE);
}
}
private static final class TrailingHttpHeaders extends DefaultHttpHeaders {
private static final NameValidator<CharSequence> TrailerNameValidator = new NameValidator<CharSequence>() {
@Override
public void validateName(CharSequence name) {
DefaultHttpHeaders.HttpNameValidator.validateName(name);
if (HttpHeaderNames.CONTENT_LENGTH.contentEqualsIgnoreCase(name)
|| HttpHeaderNames.TRANSFER_ENCODING.contentEqualsIgnoreCase(name)
|| HttpHeaderNames.TRAILER.contentEqualsIgnoreCase(name)) {
throw new IllegalArgumentException("prohibited trailing header: " + name);
}
}
};
@SuppressWarnings({ "unchecked" })
TrailingHttpHeaders(boolean validate) {
super(validate, validate ? TrailerNameValidator : NameValidator.NOT_NULL);
}
}
}