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
28 package org.apache.http.impl.io;
29
30 import java.io.IOException;
31
32 import org.apache.http.ConnectionClosedException;
33 import org.apache.http.HttpException;
34 import org.apache.http.HttpMessage;
35 import org.apache.http.HttpRequest;
36 import org.apache.http.HttpRequestFactory;
37 import org.apache.http.ParseException;
38 import org.apache.http.RequestLine;
39 import org.apache.http.annotation.NotThreadSafe;
40 import org.apache.http.io.SessionInputBuffer;
41 import org.apache.http.message.LineParser;
42 import org.apache.http.message.ParserCursor;
43 import org.apache.http.params.HttpParams;
44 import org.apache.http.util.Args;
45 import org.apache.http.util.CharArrayBuffer;
46
47 /**
48 * HTTP request parser that obtain its input from an instance
49 * of {@link SessionInputBuffer}.
50 * <p>
51 * The following parameters can be used to customize the behavior of this
52 * class:
53 * <ul>
54 * <li>{@link org.apache.http.params.CoreConnectionPNames#MAX_HEADER_COUNT}</li>
55 * <li>{@link org.apache.http.params.CoreConnectionPNames#MAX_LINE_LENGTH}</li>
56 * </ul>
57 *
58 * @since 4.0
59 *
60 * @deprecated (4.2) use {@link DefaultHttpRequestParser}
61 */
62 @Deprecated
63 @NotThreadSafe
64 public class HttpRequestParser extends AbstractMessageParser<HttpMessage> {
65
66 private final HttpRequestFactory requestFactory;
67 private final CharArrayBuffer lineBuf;
68
69 /**
70 * Creates an instance of this class.
71 *
72 * @param buffer the session input buffer.
73 * @param parser the line parser.
74 * @param requestFactory the factory to use to create
75 * {@link HttpRequest}s.
76 * @param params HTTP parameters.
77 */
78 public HttpRequestParser(
79 final SessionInputBuffer buffer,
80 final LineParser parser,
81 final HttpRequestFactory requestFactory,
82 final HttpParams params) {
83 super(buffer, parser, params);
84 this.requestFactory = Args.notNull(requestFactory, "Request factory");
85 this.lineBuf = new CharArrayBuffer(128);
86 }
87
88 @Override
89 protected HttpMessage parseHead(
90 final SessionInputBuffer sessionBuffer)
91 throws IOException, HttpException, ParseException {
92
93 this.lineBuf.clear();
94 final int i = sessionBuffer.readLine(this.lineBuf);
95 if (i == -1) {
96 throw new ConnectionClosedException("Client closed connection");
97 }
98 final ParserCursor cursor = new ParserCursor(0, this.lineBuf.length());
99 final RequestLine requestline = this.lineParser.parseRequestLine(this.lineBuf, cursor);
100 return this.requestFactory.newHttpRequest(requestline);
101 }
102
103 }