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.HttpRequest;
35 import org.apache.http.HttpRequestFactory;
36 import org.apache.http.ParseException;
37 import org.apache.http.RequestLine;
38 import org.apache.http.config.MessageConstraints;
39 import org.apache.http.impl.DefaultHttpRequestFactory;
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 *
51 * @since 4.2
52 */
53 @SuppressWarnings("deprecation")
54 public class DefaultHttpRequestParser extends AbstractMessageParser<HttpRequest> {
55
56 private final HttpRequestFactory requestFactory;
57 private final CharArrayBuffer lineBuf;
58
59 /**
60 * Creates an instance of this class.
61 *
62 * @param buffer the session input buffer.
63 * @param lineParser the line parser.
64 * @param requestFactory the factory to use to create
65 * {@link HttpRequest}s.
66 * @param params HTTP parameters.
67 *
68 * @deprecated (4.3) use
69 * {@link DefaultHttpRequestParser#DefaultHttpRequestParser(SessionInputBuffer, LineParser,
70 * HttpRequestFactory, MessageConstraints)}
71 */
72 @Deprecated
73 public DefaultHttpRequestParser(
74 final SessionInputBuffer buffer,
75 final LineParser lineParser,
76 final HttpRequestFactory requestFactory,
77 final HttpParams params) {
78 super(buffer, lineParser, params);
79 this.requestFactory = Args.notNull(requestFactory, "Request factory");
80 this.lineBuf = new CharArrayBuffer(128);
81 }
82
83 /**
84 * Creates new instance of DefaultHttpRequestParser.
85 *
86 * @param buffer the session input buffer.
87 * @param lineParser the line parser. If {@code null}
88 * {@link org.apache.http.message.BasicLineParser#INSTANCE} will be used.
89 * @param requestFactory the response factory. If {@code null}
90 * {@link DefaultHttpRequestFactory#INSTANCE} will be used.
91 * @param constraints the message constraints. If {@code null}
92 * {@link MessageConstraints#DEFAULT} will be used.
93 *
94 * @since 4.3
95 */
96 public DefaultHttpRequestParser(
97 final SessionInputBuffer buffer,
98 final LineParser lineParser,
99 final HttpRequestFactory requestFactory,
100 final MessageConstraints constraints) {
101 super(buffer, lineParser, constraints);
102 this.requestFactory = requestFactory != null ? requestFactory :
103 DefaultHttpRequestFactory.INSTANCE;
104 this.lineBuf = new CharArrayBuffer(128);
105 }
106
107 /**
108 * @since 4.3
109 */
110 public DefaultHttpRequestParser(
111 final SessionInputBuffer buffer,
112 final MessageConstraints constraints) {
113 this(buffer, null, null, constraints);
114 }
115
116 /**
117 * @since 4.3
118 */
119 public DefaultHttpRequestParser(final SessionInputBuffer buffer) {
120 this(buffer, null, null, MessageConstraints.DEFAULT);
121 }
122
123 @Override
124 protected HttpRequest parseHead(
125 final SessionInputBuffer sessionBuffer)
126 throws IOException, HttpException, ParseException {
127
128 this.lineBuf.clear();
129 final int readLen = sessionBuffer.readLine(this.lineBuf);
130 if (readLen == -1) {
131 throw new ConnectionClosedException("Client closed connection");
132 }
133 final ParserCursorursor.html#ParserCursor">ParserCursor cursor = new ParserCursor(0, this.lineBuf.length());
134 final RequestLine requestline = this.lineParser.parseRequestLine(this.lineBuf, cursor);
135 return this.requestFactory.newHttpRequest(requestline);
136 }
137
138 }