DefaultHttp2Headers.java — netty Source File

Source Code

/*
 * 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:
 *
 * https://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.handler.codec.CharSequenceValueConverter;
import io.netty.handler.codec.DefaultHeaders;
import io.netty.handler.codec.http.HttpHeaderValidationUtil;
import io.netty.util.AsciiString;
import io.netty.util.ByteProcessor;
import io.netty.util.internal.PlatformDependent;

import static io.netty.handler.codec.http2.Http2Error.PROTOCOL_ERROR;
import static io.netty.handler.codec.http2.Http2Exception.connectionError;
import static io.netty.handler.codec.http2.Http2Headers.PseudoHeaderName.hasPseudoHeaderFormat;
import static io.netty.handler.codec.http2.Http2Headers.PseudoHeaderName.isPseudoHeader;
import static io.netty.util.AsciiString.CASE_INSENSITIVE_HASHER;
import static io.netty.util.AsciiString.CASE_SENSITIVE_HASHER;
import static io.netty.util.AsciiString.isUpperCase;

public class DefaultHttp2Headers
        extends DefaultHeaders<CharSequence, CharSequence, Http2Headers> implements Http2Headers {
    private static final ByteProcessor HTTP2_NAME_VALIDATOR_PROCESSOR = new ByteProcessor() {
        @Override
        public boolean process(byte value) {
            return !isUpperCase(value);
        }
    };
    private static final NameValidator<CharSequence> HTTP2_NAME_VALIDATOR = new NameValidator<CharSequence>() {
        @Override
        public void validateName(CharSequence name) {
            if (name == null || name.length() == 0) {
                PlatformDependent.throwException(connectionError(PROTOCOL_ERROR,
                        "empty headers are not allowed [%s]", name));
            }

            if (hasPseudoHeaderFormat(name)) {
                if (!isPseudoHeader(name)) {
                    PlatformDependent.throwException(connectionError(
                            PROTOCOL_ERROR, "Invalid HTTP/2 pseudo-header '%s' encountered.", name));
                }
                // no need for lower-case validation, we trust our own pseudo header constants
                return;
            }

            if (name instanceof AsciiString) {
                final int index;
                try {
                    index = ((AsciiString) name).forEachByte(HTTP2_NAME_VALIDATOR_PROCESSOR);
// ... (257 more lines)