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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  package org.apache.hc.core5.http.impl;
28  
29  import org.apache.hc.core5.annotation.Internal;
30  import org.apache.hc.core5.http.HttpStatus;
31  import org.apache.hc.core5.http.MethodNotSupportedException;
32  import org.apache.hc.core5.http.MisdirectedRequestException;
33  import org.apache.hc.core5.http.NotImplementedException;
34  import org.apache.hc.core5.http.ProtocolException;
35  import org.apache.hc.core5.http.RequestHeaderFieldsTooLargeException;
36  import org.apache.hc.core5.http.UnsupportedHttpVersionException;
37  
38  /**
39   * HTTP Server support methods.
40   *
41   * @since 5.0
42   */
43  @Internal
44  public class ServerSupport {
45  
46      public static String toErrorMessage(final Exception ex) {
47          final String message = ex.getMessage();
48          return message != null ? message : ex.toString();
49      }
50  
51      public static int toStatusCode(final Exception ex) {
52          final int code;
53          if (ex instanceof MethodNotSupportedException) {
54              code = HttpStatus.SC_NOT_IMPLEMENTED;
55          } else if (ex instanceof UnsupportedHttpVersionException) {
56              code = HttpStatus.SC_HTTP_VERSION_NOT_SUPPORTED;
57          } else if (ex instanceof NotImplementedException) {
58              code = HttpStatus.SC_NOT_IMPLEMENTED;
59          } else if (ex instanceof RequestHeaderFieldsTooLargeException) {
60              code = HttpStatus.SC_REQUEST_HEADER_FIELDS_TOO_LARGE;
61          } else if (ex instanceof MisdirectedRequestException) {
62              code = HttpStatus.SC_MISDIRECTED_REQUEST;
63          } else if (ex instanceof ProtocolException) {
64              code = HttpStatus.SC_BAD_REQUEST;
65          } else {
66              code = HttpStatus.SC_INTERNAL_SERVER_ERROR;
67          }
68          return code;
69      }
70  
71  }
72