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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  
28  package org.apache.http.client.fluent;
29  
30  import java.io.IOException;
31  import java.io.InputStream;
32  import java.io.OutputStream;
33  
34  import org.apache.http.entity.AbstractHttpEntity;
35  import org.apache.http.entity.ContentType;
36  import org.apache.http.util.Args;
37  
38  class InternalInputStreamEntity extends AbstractHttpEntity {
39  
40      private final InputStream content;
41      private final long length;
42  
43      public InternalInputStreamEntity(final InputStream instream, final long length, final ContentType contentType) {
44          super();
45          this.content = Args.notNull(instream, "Source input stream");
46          this.length = length;
47          if (contentType != null) {
48              setContentType(contentType.toString());
49          }
50      }
51  
52      @Override
53      public boolean isRepeatable() {
54          return false;
55      }
56  
57      @Override
58      public long getContentLength() {
59          return this.length;
60      }
61  
62      @Override
63      public InputStream getContent() throws IOException {
64          return this.content;
65      }
66  
67      @Override
68      public void writeTo(final OutputStream outstream) throws IOException {
69          Args.notNull(outstream, "Output stream");
70          final InputStream instream = this.content;
71          try {
72              final byte[] buffer = new byte[4096];
73              int l;
74              if (this.length < 0) {
75                  // consume until EOF
76                  while ((l = instream.read(buffer)) != -1) {
77                      outstream.write(buffer, 0, l);
78                  }
79              } else {
80                  // consume no more than length
81                  long remaining = this.length;
82                  while (remaining > 0) {
83                      l = instream.read(buffer, 0, (int)Math.min(4096, remaining));
84                      if (l == -1) {
85                          break;
86                      }
87                      outstream.write(buffer, 0, l);
88                      remaining -= l;
89                  }
90              }
91          } finally {
92              instream.close();
93          }
94      }
95  
96      @Override
97      public boolean isStreaming() {
98          return true;
99      }
100 
101 }