com.sun.grizzly.websockets.ClientHandShake Maven / Gradle / Ivy

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package com.sun.grizzly.websockets;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Map;

public class ClientHandShake extends HandShake {
    private final SecKey key;

    public ClientHandShake(boolean isSecure, String origin, String serverHostName, String portNumber, String path) {
        super(isSecure, origin, serverHostName, portNumber, path);
        key = new SecKey();
    }

    public SecKey getKey() {
        return key;
    }

    public void validateServerResponse(final Map headers) throws HandshakeException {
        if(!WebSocketEngine.RESPONSE_CODE_VALUE.equals(headers.get(WebSocketEngine.RESPONSE_CODE_HEADER))) {
            throw new HandshakeException(String.format("Response code was not %s: %s",
                    WebSocketEngine.RESPONSE_CODE_VALUE,
                    headers.get(WebSocketEngine.RESPONSE_CODE_HEADER)));
        }
        checkForHeader(headers, WebSocketEngine.UPGRADE, WebSocketEngine.WEBSOCKET);
        checkForHeader(headers, WebSocketEngine.CONNECTION, WebSocketEngine.UPGRADE);
        key.validateServerKey(headers.get(WebSocketEngine.SEC_WS_ACCEPT));
    }

    private void checkForHeader(Map headers, final String header, final String validValue) {
        final String value = headers.get(header);
        if(!validValue.equalsIgnoreCase(value)) {
            throw new HandshakeException(String.format("Invalid %s header returned: '%s'", header, value));
        }
    }

    public byte[] getBytes() throws IOException {
        ByteArrayOutputStream chunk = new ByteArrayOutputStream();
        chunk.write(String.format("GET %s HTTP/1.1\r\n", getResourcePath()).getBytes());
        chunk.write(String.format("Host: %s\r\n", getServerHostName()).getBytes());
        chunk.write(String.format("Connection: Upgrade\r\n").getBytes());
        chunk.write(String.format("Upgrade: WebSocket\r\n").getBytes());
        chunk.write(String.format("%s: %s\r\n", WebSocketEngine.SEC_WS_KEY_HEADER, getKey()).getBytes());
        chunk.write(String.format("%s: %s\r\n", WebSocketEngine.SEC_WS_ORIGIN_HEADER, getOrigin()).getBytes());
        chunk.write(String.format("%s: %s\r\n", WebSocketEngine.SEC_WS_VERSION, WebSocketEngine.WS_VERSION).getBytes());
        if (getSubProtocol() != null) {
            chunk.write(
                    String.format("%s: %s\r\n", WebSocketEngine.SEC_WS_PROTOCOL_HEADER, join(getSubProtocol())).getBytes());
        }
        if (getExtensions() != null) {
            chunk.write(
                    String.format("%s: %s\r\n", WebSocketEngine.SEC_WS_EXTENSIONS_HEADER, join(getExtensions())).getBytes());
        }
        chunk.write("\r\n".getBytes());

        return chunk.toByteArray();
    }

}