com.webpieces.http2parser.api.dto.Http2Settings Maven / Gradle / Ivy

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A re-usable asynchronous http2 parser

There is a newer version: 2.1.1

package com.webpieces.http2parser.api.dto;

import org.webpieces.data.api.DataWrapper;

import java.nio.ByteBuffer;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;

public class Http2Settings extends Http2Frame {
    public enum Parameter {
        SETTINGS_HEADER_TABLE_SIZE(0x1),
        SETTINGS_ENABLE_PUSH(0x2),
        SETTINGS_MAX_CONCURRENT_STREAMS(0x3),
        SETTINGS_INITIAL_WINDOW_SIZE(0x4),
        SETTINGS_MAX_FRAME_SIZE(0x5),
        SETTINGS_MAX_HEADER_LIST_SIZE(0x6);

        private short id;

        Parameter(int id) {
            this.id = (short) id;
        }

        public short getId() {
            return id;
        }

        public static Parameter fromId(short id) {
            switch (id) {
                case 0x1:
                    return SETTINGS_HEADER_TABLE_SIZE;
                case 0x2:
                    return SETTINGS_ENABLE_PUSH;
                case 0x3:
                    return SETTINGS_MAX_CONCURRENT_STREAMS;
                case 0x4:
                    return SETTINGS_INITIAL_WINDOW_SIZE;
                case 0x5:
                    return SETTINGS_MAX_FRAME_SIZE;
                case 0x6:
                    return SETTINGS_MAX_HEADER_LIST_SIZE;
                default:
                    return SETTINGS_HEADER_TABLE_SIZE; // TODO: throw here
            }
        }
    }
    public Http2FrameType getFrameType() {
        return Http2FrameType.SETTINGS;
    }

    /* flags */
    private boolean ack = false; /* 0x1 */

    public boolean isAck() {
        return ack;
    }

    public void setAck(boolean ack) {
        this.ack = ack;

        // If ack, the settings must be empty
        if(ack)
            this.settings.clear();
    }



    /* payload */

    // id 16bits
    // value 32bits
    private Map settings = new LinkedHashMap<>();


    public void setSetting(Http2Settings.Parameter param, Integer value) {
        settings.put(param, value);
    }

    public Map getSettings() {
        if (!ack) {
            return settings;
        } else {
            return Collections.emptyMap();
        }
    }
}