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/*
 * Copyright 2013 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.spdy;

import io.netty.handler.codec.Headers;
import io.netty.util.AsciiString;

import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;

/**
 * Provides the constants for the standard SPDY HTTP header names and commonly
 * used utility methods that access a {@link SpdyHeadersFrame}.
 */
public interface SpdyHeaders extends Headers {

    /**
     * SPDY HTTP header names
     */
    final class HttpNames {
        /**
         * {@code ":host"}
         */
        public static final AsciiString HOST = AsciiString.cached(":host");
        /**
         * {@code ":method"}
         */
        public static final AsciiString METHOD = AsciiString.cached(":method");
        /**
         * {@code ":path"}
         */
        public static final AsciiString PATH = AsciiString.cached(":path");
        /**
         * {@code ":scheme"}
         */
        public static final AsciiString SCHEME = AsciiString.cached(":scheme");
        /**
         * {@code ":status"}
         */
        public static final AsciiString STATUS = AsciiString.cached(":status");
        /**
         * {@code ":version"}
         */
        public static final AsciiString VERSION = AsciiString.cached(":version");

        private HttpNames() { }
    }

    /**
     * {@link Headers#get(Object)} and convert the result to a {@link String}.
     * @param name the name of the header to retrieve
     * @return the first header value if the header is found. {@code null} if there's no such header.
     */
    String getAsString(CharSequence name);

    /**
     * {@link Headers#getAll(Object)} and convert each element of {@link List} to a {@link String}.
     * @param name the name of the header to retrieve
     * @return a {@link List} of header values or an empty {@link List} if no values are found.
     */
    List getAllAsString(CharSequence name);

    /**
     * {@link #iterator()} that converts each {@link Entry}'s key and value to a {@link String}.
     */
    Iterator> iteratorAsString();

    /**
     * Returns {@code true} if a header with the {@code name} and {@code value} exists, {@code false} otherwise.
     * 

* If {@code ignoreCase} is {@code true} then a case insensitive compare is done on the value. * @param name the name of the header to find * @param value the value of the header to find * @param ignoreCase {@code true} then a case insensitive compare is run to compare values. * otherwise a case sensitive compare is run to compare values. */ boolean contains(CharSequence name, CharSequence value, boolean ignoreCase); }





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