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/*
* SPDX-FileCopyrightText: 2021-2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.language.web.config;
import com.google.gson.Gson;
import jakarta.servlet.ServletConfig;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.eclipse.jetty.http.HttpStatus;
import java.io.IOException;
public class BackendConfigServlet extends HttpServlet {
public static final String WEBSOCKET_URL_INIT_PARAM = "tools.refinery.language.web.config.BackendConfigServlet" +
".webSocketUrl";
private String serializedConfig;
@Override
public void init(ServletConfig config) throws ServletException {
super.init(config);
var webSocketUrl = config.getInitParameter(WEBSOCKET_URL_INIT_PARAM);
if (webSocketUrl == null) {
throw new IllegalArgumentException("Init parameter " + WEBSOCKET_URL_INIT_PARAM + " is mandatory");
}
var backendConfig = new BackendConfig(webSocketUrl);
var gson = new Gson();
serializedConfig = gson.toJson(backendConfig);
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
resp.setStatus(HttpStatus.OK_200);
resp.setContentType("application/json");
var writer = resp.getWriter();
writer.write(serializedConfig);
writer.flush();
}
}
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