Mercurial > hg > blitz_stable
annotate src/com/go/trove/net/HttpUtils.java @ 35:6f68e94c1fb8 default tip
Add CondensedStats monitoring utility, equivalent to vmstat
author | Dominic Cleal <dominic-cleal@cdo2.com> |
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date | Thu, 05 Aug 2010 11:07:25 +0100 |
parents | 3dc0c5604566 |
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0
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1 /* |
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2 * HttpUtils.java |
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3 * |
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4 * Copyright (c) 2000 Walt Disney Internet Group. All Rights Reserved. |
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5 * |
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6 * Original author: Brian S O'Neill |
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7 * |
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8 * $Workfile:: HttpUtils.java $ |
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9 * $Author: dan $ |
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10 * $Revision: 1.1 $ |
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11 * $Date: Mon, 13 Oct 2003 12:20:39 +0100 $ |
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12 */ |
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13 |
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14 package com.go.trove.net; |
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15 |
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16 import java.io.*; |
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17 |
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18 /****************************************************************************** |
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19 * |
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20 * @author Brian S O'Neill |
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21 * @version |
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22 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 01/04/03 <!-- $--> |
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23 */ |
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24 public class HttpUtils { |
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25 /** |
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26 * Reads a line from an HTTP InputStream, using the given buffer for |
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27 * temporary storage. |
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28 * |
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29 * @param in stream to read from |
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30 * @param buffer temporary buffer to use |
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31 * @throws IllegalArgumentException if the given InputStream doesn't |
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32 * support marking |
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33 */ |
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34 public static String readLine(InputStream in, byte[] buffer) |
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35 throws IllegalArgumentException, IOException |
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36 { |
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37 return readLine(in, buffer, -1); |
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38 } |
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39 |
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40 /** |
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41 * Reads a line from an HTTP InputStream, using the given buffer for |
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42 * temporary storage. |
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43 * |
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44 * @param in stream to read from |
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45 * @param buffer temporary buffer to use |
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46 * @throws IllegalArgumentException if the given InputStream doesn't |
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47 * support marking |
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48 * @throws LineTooLongException when line is longer than the limit |
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49 */ |
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50 public static String readLine(InputStream in, byte[] buffer, int limit) |
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51 throws IllegalArgumentException, IOException, LineTooLongException |
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52 { |
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53 if (!in.markSupported()) { |
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54 throw new IllegalArgumentException |
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55 ("InputStream doesn't support marking: " + in.getClass()); |
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56 } |
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57 |
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58 String line = null; |
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59 |
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60 int cursor = 0; |
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61 int len = buffer.length; |
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62 |
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63 int count = 0; |
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64 int c; |
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65 loop: |
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66 while ((c = in.read()) >= 0) { |
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67 if (limit >= 0 && ++count > limit) { |
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68 throw new LineTooLongException(limit); |
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69 } |
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70 |
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71 switch (c) { |
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72 case '\r': |
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73 in.mark(1); |
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74 if (in.read() != '\n') { |
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75 in.reset(); |
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76 } |
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77 // fall through |
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78 case '\n': |
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79 if (line == null && cursor == 0) { |
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80 return ""; |
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81 } |
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82 break loop; |
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83 default: |
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84 if (cursor >= len) { |
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85 if (line == null) { |
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86 line = new String(buffer, "8859_1"); |
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87 } |
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88 else { |
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89 line = line.concat(new String(buffer, "8859_1")); |
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90 } |
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91 cursor = 0; |
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92 } |
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93 buffer[cursor++] = (byte)c; |
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94 } |
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95 } |
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96 |
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97 if (cursor > 0) { |
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98 if (line == null) { |
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99 line = new String(buffer, 0, cursor, "8859_1"); |
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100 } |
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101 else { |
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102 line = line.concat(new String(buffer, 0, cursor, "8859_1")); |
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103 } |
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104 } |
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105 |
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106 return line; |
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107 } |
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108 |
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109 /** |
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110 * Reads a line from an HTTP InputStream, using the given buffer for |
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111 * temporary storage. |
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112 * |
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113 * @param in stream to read from |
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114 * @param buffer temporary buffer to use |
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115 * @throws IllegalArgumentException if the given InputStream doesn't |
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116 * support marking |
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117 */ |
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118 public static String readLine(InputStream in, char[] buffer) |
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119 throws IllegalArgumentException, IOException |
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120 { |
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121 return readLine(in, buffer, -1); |
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122 } |
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123 |
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124 /** |
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125 * Reads a line from an HTTP InputStream, using the given buffer for |
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126 * temporary storage. |
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127 * |
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128 * @param in stream to read from |
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129 * @param buffer temporary buffer to use |
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130 * @throws IllegalArgumentException if the given InputStream doesn't |
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131 * support marking |
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132 * @throws LineTooLongException when line is longer than the limit |
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133 */ |
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134 public static String readLine(InputStream in, char[] buffer, int limit) |
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135 throws IllegalArgumentException, IOException, LineTooLongException |
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136 { |
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137 if (!in.markSupported()) { |
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138 throw new IllegalArgumentException |
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139 ("InputStream doesn't support marking: " + in.getClass()); |
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140 } |
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141 |
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142 String line = null; |
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143 |
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144 int cursor = 0; |
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145 int len = buffer.length; |
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146 |
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147 int count = 0; |
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148 int c; |
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149 loop: |
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150 while ((c = in.read()) >= 0) { |
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151 if (limit >= 0 && ++count > limit) { |
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152 throw new LineTooLongException(limit); |
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153 } |
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154 |
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155 switch (c) { |
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156 case '\r': |
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157 in.mark(1); |
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158 if (in.read() != '\n') { |
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159 in.reset(); |
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160 } |
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161 // fall through |
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162 case '\n': |
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163 if (line == null && cursor == 0) { |
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164 return ""; |
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165 } |
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166 break loop; |
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167 default: |
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168 if (cursor >= len) { |
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169 if (line == null) { |
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170 line = new String(buffer); |
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171 } |
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172 else { |
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173 line = line.concat(new String(buffer)); |
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174 } |
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175 cursor = 0; |
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176 } |
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177 buffer[cursor++] = (char)c; |
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178 } |
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179 } |
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180 |
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181 if (cursor > 0) { |
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182 if (line == null) { |
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183 line = new String(buffer, 0, cursor); |
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184 } |
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185 else { |
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186 line = line.concat(new String(buffer, 0, cursor)); |
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187 } |
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188 } |
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189 |
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190 return line; |
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191 } |
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192 } |