org.openqa.selenium.grid.server.WrapExceptions Maven / Gradle / Ivy

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// 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
//
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package org.openqa.selenium.grid.server;

import org.openqa.selenium.grid.web.ErrorCodec;
import org.openqa.selenium.json.Json;
import org.openqa.selenium.remote.http.Filter;
import org.openqa.selenium.remote.http.HttpHandler;
import org.openqa.selenium.remote.http.HttpResponse;

import static com.google.common.net.MediaType.JSON_UTF_8;
import static org.openqa.selenium.remote.http.Contents.utf8String;

public class WrapExceptions implements Filter {

  private static final Json JSON = new Json();
  private final ErrorCodec errors = ErrorCodec.createDefault();

  @Override
  public HttpHandler apply(HttpHandler next) {
    return req -> {
      try {
        return next.execute(req);
      } catch (Throwable cause) {
        HttpResponse res = new HttpResponse();
        res.setStatus(errors.getHttpStatusCode(cause));

        res.addHeader("Content-Type", JSON_UTF_8.toString());
        res.addHeader("Cache-Control", "none");

        res.setContent(utf8String(JSON.toJson(errors.encode(cause))));

        return res;
      }
    };
  }
}