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Java > Open Source Codes > org > apache > coyote > http11 > filters > SavedRequestInputFilter


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18 package org.apache.coyote.http11.filters;
19
20 import java.io.IOException JavaDoc;
21
22 import org.apache.coyote.InputBuffer;
23 import org.apache.coyote.http11.InputFilter;
24 import org.apache.tomcat.util.buf.ByteChunk;
25
26 /**
27  * Input filter responsible for replaying the request body when restoring the
28  * saved request after FORM authentication.
29  */
30 public class SavedRequestInputFilter implements InputFilter {
31
32     /**
33      * The original request body.
34      */
35     protected ByteChunk input = null;
36
37     /**
38      * Create a new SavedRequestInputFilter.
39      *
40      * @param input The saved request body to be replayed.
41      */
42     public SavedRequestInputFilter(ByteChunk input) {
43         this.input = input;
44     }
45
46     /**
47      * Read bytes.
48      */
49     public int doRead(ByteChunk chunk, org.apache.coyote.Request request)
50             throws IOException JavaDoc {
51         int writeLength = 0;
52         
53         if (chunk.getLimit() > 0 && chunk.getLimit() < input.getLength()) {
54             writeLength = chunk.getLimit();
55         } else {
56             writeLength = input.getLength();
57         }
58         
59         if(input.getOffset()>= input.getEnd())
60             return -1;
61         
62         input.substract(chunk.getBuffer(), 0, writeLength);
63         chunk.setOffset(0);
64         chunk.setEnd(writeLength);
65         
66         return writeLength;
67     }
68
69     /**
70      * Set the content length on the request.
71      */
72     public void setRequest(org.apache.coyote.Request request) {
73         request.setContentLength(input.getLength());
74     }
75
76     /**
77      * Make the filter ready to process the next request.
78      */
79     public void recycle() {
80         input = null;
81     }
82
83     /**
84      * Return the name of the associated encoding; here, the value is null.
85      */
86     public ByteChunk getEncodingName() {
87         return null;
88     }
89
90     /**
91      * Set the next buffer in the filter pipeline (has no effect).
92      */
93     public void setBuffer(InputBuffer buffer) {
94     }
95
96     /**
97      * End the current request (has no effect).
98      */
99     public long end() throws IOException JavaDoc {
100         return 0;
101     }
102
103 }
104
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