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1   /*
2    * Copyright 2012 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package org.jboss.netty.handler.codec.http;
17  
18  import org.jboss.netty.buffer.ChannelBuffer;
19  
20  import static org.jboss.netty.handler.codec.http.HttpConstants.*;
21  
22  /**
23   * Encodes an {@link HttpRequest} or an {@link HttpChunk} into
24   * a {@link ChannelBuffer}.
25   */
26  public class HttpRequestEncoder extends HttpMessageEncoder {
27      private static final char SLASH = '/';
28      private static final char QUESTION_MARK = '?';
29  
30      @Override
31      protected void encodeInitialLine(ChannelBuffer buf, HttpMessage message) throws Exception {
32          HttpRequest request = (HttpRequest) message;
33          buf.writeBytes(request.getMethod().toString().getBytes("ASCII"));
34          buf.writeByte(SP);
35  
36          // Add / as absolute path if no is present.
37          // See http://tools.ietf.org/html/rfc2616#section-5.1.2
38          String uri = request.getUri();
39          int start = uri.indexOf("://");
40          if (start != -1) {
41              int startIndex = start + 3;
42              // Correctly handle query params.
43              // See https://github.com/netty/netty/issues/2732
44              int index = uri.indexOf(QUESTION_MARK, startIndex);
45              if (index == -1) {
46                  if (uri.lastIndexOf(SLASH) <= startIndex) {
47                      uri += SLASH;
48                  }
49              } else {
50                  if (uri.lastIndexOf(SLASH, index) <= startIndex) {
51                      int len = uri.length();
52                      StringBuilder sb = new StringBuilder(len + 1);
53                      sb.append(uri, 0, index);
54                      sb.append(SLASH);
55                      sb.append(uri, index, len);
56                      uri = sb.toString();
57                  }
58              }
59          }
60  
61          buf.writeBytes(uri.getBytes("UTF-8"));
62          buf.writeByte(SP);
63          buf.writeBytes(request.getProtocolVersion().toString().getBytes("ASCII"));
64          buf.writeByte(CR);
65          buf.writeByte(LF);
66      }
67  }