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A barebones WebSocket client and server implementation written in 100% Java.

There is a newer version: 1.5.8

/*
 * Copyright (c) 2010-2020 Nathan Rajlich
 *
 *  Permission is hereby granted, free of charge, to any person
 *  obtaining a copy of this software and associated documentation
 *  files (the "Software"), to deal in the Software without
 *  restriction, including without limitation the rights to use,
 *  copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the
 *  Software is furnished to do so, subject to the following
 *  conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *  OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *  OTHER DEALINGS IN THE SOFTWARE.
 */

package org.java_websocket.handshake;

import java.util.Collections;
import java.util.Iterator;
import java.util.TreeMap;

/**
 * Implementation of a handshake builder
 */
public class HandshakedataImpl1 implements HandshakeBuilder {

  /**
   * Attribute for the content of the handshake
   */
  private byte[] content;

  /**
   * Attribute for the http fields and values
   */
  private TreeMap map;

  /**
   * Constructor for handshake implementation
   */
  public HandshakedataImpl1() {
    map = new TreeMap<>(String.CASE_INSENSITIVE_ORDER);
  }

  @Override
  public Iterator iterateHttpFields() {
    return Collections.unmodifiableSet(map.keySet()).iterator();// Safety first
  }

  @Override
  public String getFieldValue(String name) {
    String s = map.get(name);
    if (s == null) {
      return "";
    }
    return s;
  }

  @Override
  public byte[] getContent() {
    return content;
  }

  @Override
  public void setContent(byte[] content) {
    this.content = content;
  }

  @Override
  public void put(String name, String value) {
    map.put(name, value);
  }

  @Override
  public boolean hasFieldValue(String name) {
    return map.containsKey(name);
  }
}