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annotate src/org/eclipse/jetty/util/ReadLineInputStream.java @ 803:166b16bda630

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remove org.eclipse.jetty.util.preventers
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 07 Sep 2016 21:21:32 -0600
parents 3428c60d7cfc
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.util;
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20
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21 import java.io.BufferedInputStream;
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22 import java.io.IOException;
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23 import java.io.InputStream;
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24
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25 /**
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26 * ReadLineInputStream
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27 *
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28 * Read from an input stream, accepting CR/LF, LF or just CR.
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29 */
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30 public class ReadLineInputStream extends BufferedInputStream
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31 {
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32 boolean _seenCRLF;
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33 boolean _skipLF;
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34
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35 public ReadLineInputStream(InputStream in)
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36 {
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37 super(in);
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38 }
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39
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40 public ReadLineInputStream(InputStream in, int size)
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41 {
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42 super(in,size);
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43 }
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44
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45 public String readLine() throws IOException
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46 {
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47 mark(buf.length);
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48
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49 while (true)
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50 {
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51 int b=super.read();
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52
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53 if (markpos < 0)
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54 throw new IOException("Buffer size exceeded: no line terminator");
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55
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56 if (b==-1)
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57 {
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58 int m=markpos;
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59 markpos=-1;
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60 if (pos>m)
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61 return new String(buf,m,pos-m,StringUtil.__UTF8_CHARSET);
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62
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63 return null;
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64 }
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65
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66 if (b=='\r')
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67 {
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68 int p=pos;
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69
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70 // if we have seen CRLF before, hungrily consume LF
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71 if (_seenCRLF && pos<count)
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72 {
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73 if (buf[pos]=='\n')
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74 pos+=1;
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75 }
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76 else
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77 _skipLF=true;
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78 int m=markpos;
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79 markpos=-1;
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80 return new String(buf,m,p-m-1,StringUtil.__UTF8_CHARSET);
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81 }
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82
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83 if (b=='\n')
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84 {
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85 if (_skipLF)
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86 {
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87 _skipLF=false;
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88 _seenCRLF=true;
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89 markpos++;
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90 continue;
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91 }
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92 int m=markpos;
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93 markpos=-1;
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94 return new String(buf,m,pos-m-1,StringUtil.__UTF8_CHARSET);
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95 }
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96 }
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97 }
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98
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99 @Override
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100 public synchronized int read() throws IOException
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101 {
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102 int b = super.read();
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103 if (_skipLF)
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104 {
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105 _skipLF=false;
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106 if (_seenCRLF && b=='\n')
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107 b=super.read();
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108 }
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109 return b;
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110 }
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111
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112 @Override
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113 public synchronized int read(byte[] buf, int off, int len) throws IOException
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114 {
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115 if (_skipLF && len>0)
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116 {
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117 _skipLF=false;
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118 if (_seenCRLF)
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119 {
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120 int b = super.read();
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121 if (b==-1)
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122 return -1;
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123
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124 if (b!='\n')
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125 {
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126 buf[off]=(byte)(0xff&b);
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127 return 1+super.read(buf,off+1,len-1);
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128 }
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129 }
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130 }
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131
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132 return super.read(buf,off,len);
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133 }
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134
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135
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136 }