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/*
 * Copyright © 2019 Apple Inc. and the ServiceTalk project authors
 *
 * Licensed 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.servicetalk.http.netty;

/**
 * Defines TLS Application-Layer Protocol Negotiation (ALPN) Protocol IDs for supported protocols.
 *
 * @see RFC7540 (HTTP/2)
 * @see RFC7301 (TLS ALPN Extension)
 * @see 
 * TLS Application-Layer Protocol Negotiation (ALPN) Protocol IDs
 */
final class AlpnIds {

    /**
     * http/1.1: HTTP version 1.1
     */
    static final String HTTP_1_1 = "http/1.1";

    /**
     * h2: HTTP version 2.
     */
    static final String HTTP_2 = "h2";

    private AlpnIds() {
        // No instances
    }
}