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1 /* |
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2 * ==================================================================== |
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3 * Licensed to the Apache Software Foundation (ASF) under one |
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4 * or more contributor license agreements. See the NOTICE file |
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5 * distributed with this work for additional information |
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6 * regarding copyright ownership. The ASF licenses this file |
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7 * to you under the Apache License, Version 2.0 (the |
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8 * "License"); you may not use this file except in compliance |
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9 * with the License. You may obtain a copy of the License at |
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10 * |
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11 * http://www.apache.org/licenses/LICENSE-2.0 |
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12 * |
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13 * Unless required by applicable law or agreed to in writing, |
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14 * software distributed under the License is distributed on an |
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15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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16 * KIND, either express or implied. See the License for the |
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17 * specific language governing permissions and limitations |
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18 * under the License. |
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19 * ==================================================================== |
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20 * |
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21 * This software consists of voluntary contributions made by many |
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22 * individuals on behalf of the Apache Software Foundation. For more |
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23 * information on the Apache Software Foundation, please see |
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24 * <http://www.apache.org/>. |
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25 * |
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26 */ |
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27 |
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28 package ch.boye.httpclientandroidlib.entity; |
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29 |
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30 import java.io.IOException; |
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31 import java.io.InputStream; |
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32 import java.io.OutputStream; |
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33 |
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34 /** |
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35 * A streamed, non-repeatable entity that obtains its content from |
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36 * an {@link InputStream}. |
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37 * |
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38 * @since 4.0 |
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39 */ |
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40 public class InputStreamEntity extends AbstractHttpEntity { |
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41 |
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42 private final static int BUFFER_SIZE = 2048; |
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43 |
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44 private final InputStream content; |
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45 private final long length; |
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46 |
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47 public InputStreamEntity(final InputStream instream, long length) { |
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48 super(); |
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49 if (instream == null) { |
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50 throw new IllegalArgumentException("Source input stream may not be null"); |
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51 } |
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52 this.content = instream; |
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53 this.length = length; |
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54 } |
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55 |
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56 public boolean isRepeatable() { |
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57 return false; |
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58 } |
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59 |
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60 public long getContentLength() { |
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61 return this.length; |
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62 } |
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63 |
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64 public InputStream getContent() throws IOException { |
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65 return this.content; |
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66 } |
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67 |
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68 public void writeTo(final OutputStream outstream) throws IOException { |
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69 if (outstream == null) { |
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70 throw new IllegalArgumentException("Output stream may not be null"); |
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71 } |
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72 InputStream instream = this.content; |
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73 try { |
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74 byte[] buffer = new byte[BUFFER_SIZE]; |
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75 int l; |
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76 if (this.length < 0) { |
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77 // consume until EOF |
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78 while ((l = instream.read(buffer)) != -1) { |
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79 outstream.write(buffer, 0, l); |
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80 } |
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81 } else { |
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82 // consume no more than length |
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83 long remaining = this.length; |
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84 while (remaining > 0) { |
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85 l = instream.read(buffer, 0, (int)Math.min(BUFFER_SIZE, remaining)); |
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86 if (l == -1) { |
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87 break; |
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88 } |
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89 outstream.write(buffer, 0, l); |
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90 remaining -= l; |
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91 } |
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92 } |
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93 } finally { |
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94 instream.close(); |
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95 } |
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96 } |
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97 |
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98 public boolean isStreaming() { |
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99 return true; |
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100 } |
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101 |
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102 /** |
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103 * @deprecated Either use {@link #getContent()} and call {@link java.io.InputStream#close()} on that; |
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104 * otherwise call {@link #writeTo(OutputStream)} which is required to free the resources. |
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105 */ |
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106 public void consumeContent() throws IOException { |
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107 // If the input stream is from a connection, closing it will read to |
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108 // the end of the content. Otherwise, we don't care what it does. |
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109 this.content.close(); |
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110 } |
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111 |
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112 } |