Mercurial Hosting > luan
annotate src/luan/modules/IoLuan.java @ 1493:471ef3e6a84e
more io
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 03 May 2020 00:12:15 -0600 |
parents | c7b86342857f |
children | f04bfbb08721 |
rev | line source |
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167
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1 package luan.modules; |
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2 |
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3 import java.io.InputStream; |
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4 import java.io.OutputStream; |
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5 import java.io.PrintStream; |
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6 import java.io.Reader; |
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7 import java.io.Writer; |
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8 import java.io.StringReader; |
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9 import java.io.BufferedReader; |
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10 import java.io.BufferedWriter; |
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11 import java.io.BufferedInputStream; |
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12 import java.io.BufferedOutputStream; |
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13 import java.io.File; |
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14 import java.io.FileInputStream; |
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15 import java.io.FileOutputStream; |
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16 import java.io.InputStreamReader; |
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17 import java.io.OutputStreamWriter; |
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18 import java.io.ByteArrayInputStream; |
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19 import java.io.StringWriter; |
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20 import java.io.IOException; |
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21 import java.io.FileNotFoundException; |
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22 import java.net.URL; |
701 | 23 import java.net.InetAddress; |
735 | 24 import java.net.Inet4Address; |
25 import java.net.NetworkInterface; | |
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26 import java.net.MalformedURLException; |
701 | 27 import java.net.UnknownHostException; |
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28 import java.nio.file.Files; |
735 | 29 import java.util.Enumeration; |
706 | 30 import java.util.Map; |
1444 | 31 import javax.naming.NamingException; |
32 import javax.naming.NameNotFoundException; | |
33 import javax.naming.directory.Attribute; | |
34 import javax.naming.directory.InitialDirContext; | |
1473 | 35 import goodjava.io.IoUtils; |
1330 | 36 import luan.Luan; |
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37 import luan.LuanTable; |
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38 import luan.LuanFunction; |
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39 import luan.LuanException; |
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40 import luan.modules.url.LuanUrl; |
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41 |
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42 |
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43 public final class IoLuan { |
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44 |
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45 public static String read_console_line(String prompt) throws IOException { |
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46 if( prompt==null ) |
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47 prompt = "> "; |
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48 return System.console().readLine(prompt); |
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49 } |
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50 |
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51 |
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52 public interface LuanWriter { |
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53 public Object out(); |
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54 public void write(Object... args) throws LuanException, IOException; |
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55 public void close() throws IOException; |
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56 } |
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57 |
1280 | 58 public static LuanWriter luanWriter(final PrintStream out) { |
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59 return new LuanWriter() { |
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60 |
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61 public Object out() { |
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62 return out; |
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63 } |
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64 |
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65 public void write(Object... args) throws LuanException { |
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66 for( Object obj : args ) { |
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67 out.print( Luan.luanToString(obj) ); |
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68 } |
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69 } |
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70 |
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71 public void close() { |
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72 out.close(); |
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73 } |
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74 }; |
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75 } |
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76 |
1280 | 77 public static LuanWriter luanWriter(final Writer out) { |
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78 return new LuanWriter() { |
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79 |
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80 public Object out() { |
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81 return out; |
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82 } |
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83 |
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84 public void write(Object... args) throws LuanException, IOException { |
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85 for( Object obj : args ) { |
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86 out.write( Luan.luanToString(obj) ); |
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87 } |
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88 } |
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89 |
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90 public void close() throws IOException { |
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91 out.close(); |
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92 } |
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93 }; |
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94 } |
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95 |
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96 static LuanFunction lines(final BufferedReader in) { |
1335 | 97 return new LuanFunction(false) { |
98 @Override public Object call(Object[] args) throws LuanException { | |
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99 try { |
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100 if( args.length > 0 ) { |
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101 if( args.length > 1 || !"close".equals(args[0]) ) |
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102 throw new LuanException( "the only argument allowed is 'close'" ); |
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103 in.close(); |
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104 return null; |
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105 } |
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106 String rtn = in.readLine(); |
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107 if( rtn==null ) |
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108 in.close(); |
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109 return rtn; |
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110 } catch(IOException e) { |
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111 throw new LuanException(e); |
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112 } |
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113 } |
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114 }; |
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115 } |
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116 |
116
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117 static LuanFunction blocks(final InputStream in,final int blockSize) { |
1335 | 118 return new LuanFunction(false) { |
116
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119 final byte[] a = new byte[blockSize]; |
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120 |
1335 | 121 @Override public Object call(Object[] args) throws LuanException { |
116
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122 try { |
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123 if( args.length > 0 ) { |
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124 if( args.length > 1 || !"close".equals(args[0]) ) |
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125 throw new LuanException( "the only argument allowed is 'close'" ); |
116
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126 in.close(); |
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127 return null; |
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128 } |
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129 if( in.read(a) == -1 ) { |
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130 in.close(); |
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131 return null; |
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132 } |
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133 return a; |
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134 } catch(IOException e) { |
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135 throw new LuanException(e); |
116
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136 } |
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137 } |
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138 }; |
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139 } |
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140 |
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141 |
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142 private static File objToFile(Luan luan,Object obj) throws LuanException { |
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143 if( obj instanceof String ) { |
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144 String fileName = (String)obj; |
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145 check(luan,"file:"+fileName); |
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146 return new File(fileName); |
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147 } |
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148 if( obj instanceof LuanTable ) { |
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149 LuanTable t = (LuanTable)obj; |
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150 Object java = t.rawGet("java"); |
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151 if( java instanceof LuanFile ) { |
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152 LuanFile luanFile = (LuanFile)java; |
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153 return luanFile.file; |
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154 } |
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155 } |
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156 return null; |
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157 } |
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158 |
125
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159 |
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160 public static abstract class LuanIn { |
1278 | 161 protected String charset = null; |
162 | |
1335 | 163 public abstract InputStream inputStream() throws IOException, LuanException; |
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164 public abstract String to_string(); |
705 | 165 public abstract String to_uri_string(); |
125
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166 |
1335 | 167 public Reader reader() throws IOException, LuanException { |
168 InputStream in = inputStream(); | |
1278 | 169 return charset==null ? new InputStreamReader(in) : new InputStreamReader(in,charset); |
314
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170 } |
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171 |
1335 | 172 public String read_text() throws IOException, LuanException { |
173 Reader in = reader(); | |
125
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174 String s = Utils.readAll(in); |
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175 in.close(); |
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176 return s; |
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177 } |
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178 |
1335 | 179 public byte[] read_binary() throws IOException, LuanException { |
180 InputStream in = inputStream(); | |
125
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181 byte[] a = Utils.readAll(in); |
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182 in.close(); |
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183 return a; |
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184 } |
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185 |
1335 | 186 public LuanFunction read_lines() throws IOException, LuanException { |
187 return lines(new BufferedReader(reader())); | |
125
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188 } |
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189 |
1335 | 190 public LuanFunction read_blocks(Integer blockSize) throws IOException, LuanException { |
125
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191 int n = blockSize!=null ? blockSize : Utils.bufSize; |
1335 | 192 return blocks(inputStream(),n); |
125
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193 } |
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194 |
1335 | 195 public boolean exists() throws IOException, LuanException { |
265
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196 try { |
1335 | 197 inputStream().close(); |
265
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198 return true; |
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199 } catch(FileNotFoundException e) { |
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200 return false; |
1251 | 201 } catch(UnknownHostException e) { |
202 return false; | |
1349 | 203 } catch(LuanException e) { |
204 if( e.getCause() instanceof FileNotFoundException ) | |
205 return false; | |
206 throw e; | |
265
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207 } |
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208 } |
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209 |
1335 | 210 public long checksum() throws IOException, LuanException { |
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211 long cs = 0; |
1335 | 212 InputStream in = new BufferedInputStream(inputStream()); |
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213 int c; |
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214 while( (c=in.read()) != -1 ) { |
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215 cs = 31 * cs + c; |
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216 } |
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217 in.close(); |
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218 return cs; |
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219 } |
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220 |
1278 | 221 public String charset() { |
222 return charset; | |
223 } | |
224 | |
225 public void set_charset(String charset) { | |
226 this.charset = charset; | |
227 } | |
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228 } |
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229 |
297
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230 public static final LuanIn defaultStdin = new LuanIn() { |
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231 |
1335 | 232 @Override public InputStream inputStream() { |
261
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233 return System.in; |
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234 } |
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235 |
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236 @Override public String to_string() { |
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237 return "<stdin>"; |
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238 } |
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239 |
705 | 240 @Override public String to_uri_string() { |
241 return "stdin:"; | |
242 } | |
243 | |
1335 | 244 @Override public String read_text() throws IOException { |
261
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245 return Utils.readAll(new InputStreamReader(System.in)); |
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246 } |
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247 |
1335 | 248 @Override public byte[] read_binary() throws IOException { |
261
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249 return Utils.readAll(System.in); |
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250 } |
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251 |
1335 | 252 @Override public boolean exists() { |
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253 return true; |
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254 } |
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255 }; |
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256 |
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257 public static abstract class LuanIO extends LuanIn { |
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258 abstract OutputStream outputStream() throws IOException; |
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259 |
1278 | 260 private Writer writer() throws IOException { |
261 OutputStream out = outputStream(); | |
262 return charset==null ? new OutputStreamWriter(out) : new OutputStreamWriter(out,charset); | |
263 } | |
264 | |
1335 | 265 public void write(Object obj) throws LuanException, IOException { |
125
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266 if( obj instanceof String ) { |
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267 String s = (String)obj; |
1278 | 268 Writer out = writer(); |
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269 out.write(s); |
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270 out.close(); |
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271 return; |
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272 } |
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273 if( obj instanceof byte[] ) { |
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274 byte[] a = (byte[])obj; |
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275 OutputStream out = outputStream(); |
1493 | 276 out.write(a); |
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277 out.close(); |
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278 return; |
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279 } |
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280 if( obj instanceof LuanTable ) { |
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281 LuanTable t = (LuanTable)obj; |
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282 Object java = t.rawGet("java"); |
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283 if( java instanceof LuanIn ) { |
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284 LuanIn luanIn = (LuanIn)java; |
1335 | 285 InputStream in = luanIn.inputStream(); |
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286 OutputStream out = outputStream(); |
1493 | 287 IoUtils.copyAll(in,out); |
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288 out.close(); |
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289 in.close(); |
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290 return; |
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291 } |
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292 } |
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293 throw new LuanException( "bad argument #1 to 'write' (string or binary or Io.uri expected)" ); |
125
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294 } |
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295 |
1280 | 296 public LuanWriter text_writer() throws IOException { |
297 return luanWriter(new BufferedWriter(writer())); | |
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298 } |
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299 |
1280 | 300 public OutputStream binary_writer() throws IOException { |
301 return new BufferedOutputStream(outputStream()); | |
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302 } |
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303 |
1335 | 304 public void write_text(Object... args) throws LuanException, IOException { |
1470 | 305 LuanWriter luanWriter = text_writer(); |
1335 | 306 luanWriter.write(args); |
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307 luanWriter.close(); |
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308 } |
1470 | 309 |
310 public void write_binary(byte[] bytes) throws LuanException, IOException { | |
311 OutputStream out = binary_writer(); | |
312 out.write(bytes); | |
313 out.close(); | |
314 } | |
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315 } |
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316 |
1280 | 317 public static final LuanIO nullIO = new LuanIO() { |
590 | 318 private final InputStream in = new InputStream() { |
319 @Override public int read() { | |
320 return -1; | |
321 } | |
322 }; | |
323 private final OutputStream out = new OutputStream() { | |
324 @Override public void write(int b) {} | |
325 }; | |
326 | |
1335 | 327 @Override public InputStream inputStream() { |
590 | 328 return in; |
329 } | |
330 | |
331 @Override OutputStream outputStream() { | |
332 return out; | |
333 } | |
334 | |
335 @Override public String to_string() { | |
336 return "<null>"; | |
337 } | |
338 | |
705 | 339 @Override public String to_uri_string() { |
340 return "null:"; | |
341 } | |
342 | |
590 | 343 }; |
344 | |
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345 public static final class LuanString extends LuanIO { |
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346 private String s; |
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347 |
1280 | 348 public LuanString(String s) throws LuanException { |
349 Utils.checkNotNull(s); | |
314
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350 this.s = s; |
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351 } |
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352 |
1335 | 353 @Override public InputStream inputStream() { |
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354 throw new UnsupportedOperationException(); |
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355 } |
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356 |
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357 @Override OutputStream outputStream() { |
314
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358 throw new UnsupportedOperationException(); |
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359 } |
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360 |
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361 @Override public String to_string() { |
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362 return "<string>"; |
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363 } |
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364 |
705 | 365 @Override public String to_uri_string() { |
366 return "string:" + s; | |
367 } | |
368 | |
1335 | 369 @Override public Reader reader() { |
314
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370 return new StringReader(s); |
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371 } |
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372 |
1335 | 373 @Override public String read_text() { |
314
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374 return s; |
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375 } |
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376 |
1335 | 377 @Override public boolean exists() { |
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378 return true; |
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379 } |
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380 |
1280 | 381 @Override public LuanWriter text_writer() { |
382 return new LuanWriter() { | |
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383 private final Writer out = new StringWriter(); |
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384 |
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385 public Object out() { |
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386 return out; |
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387 } |
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388 |
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389 public void write(Object... args) throws LuanException, IOException { |
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390 for( Object obj : args ) { |
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391 out.write( Luan.luanToString(obj) ); |
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392 } |
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393 } |
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394 |
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395 public void close() throws IOException { |
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396 s = out.toString(); |
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397 } |
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398 }; |
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399 } |
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400 } |
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401 |
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402 public static final class LuanFile extends LuanIO { |
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403 public final File file; |
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404 |
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405 public LuanFile(Luan luan,String path) throws LuanException { |
1280 | 406 this(luan,new File(path)); |
407 } | |
408 | |
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409 private LuanFile(Luan luan,File file) throws LuanException { |
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410 this(file); |
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411 check(luan,"file:"+file.toString()); |
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412 } |
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413 |
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414 private LuanFile(File file) { |
145
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415 this.file = file; |
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416 } |
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417 |
1335 | 418 @Override public InputStream inputStream() throws IOException { |
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419 return new FileInputStream(file); |
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420 } |
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421 |
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422 @Override OutputStream outputStream() throws IOException { |
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423 return new FileOutputStream(file); |
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424 } |
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425 |
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426 @Override public String to_string() { |
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427 return file.toString(); |
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428 } |
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429 |
705 | 430 @Override public String to_uri_string() { |
431 return "file:" + file.toString(); | |
432 } | |
433 | |
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434 public LuanFile child(Luan luan,String name) throws LuanException { |
1280 | 435 return new LuanFile(luan,new File(file,name)); |
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436 } |
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437 |
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438 public LuanTable children(Luan luan) throws LuanException { |
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439 File[] files = file.listFiles(); |
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440 if( files==null ) |
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441 return null; |
1267 | 442 LuanTable list = new LuanTable(luan); |
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443 for( File f : files ) { |
1280 | 444 list.rawPut(list.rawLength()+1,new LuanFile(luan,f)); |
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445 } |
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446 return list; |
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447 } |
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448 |
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449 public LuanFile parent(Luan luan) throws LuanException, IOException { |
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450 File parent = file.getParentFile(); |
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451 if( parent==null ) |
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452 parent = file.getCanonicalFile().getParentFile(); |
1280 | 453 return new LuanFile(luan,parent); |
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454 } |
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455 |
1335 | 456 @Override public boolean exists() { |
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457 return file.exists(); |
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458 } |
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459 |
1473 | 460 public void rename_to(Luan luan,Object destObj) throws LuanException, IOException { |
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461 File dest = objToFile(luan,destObj); |
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462 if( dest==null ) |
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463 throw new LuanException( "bad argument #1 to 'rename_to' (string or file table expected)" ); |
1473 | 464 IoUtils.move(file,dest); |
293
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465 } |
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466 |
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467 public void link_to(Luan luan,Object destObj) throws LuanException, IOException { |
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468 File dest = objToFile(luan,destObj); |
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469 if( dest==null ) |
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470 throw new LuanException( "bad argument #1 to 'link_to' (string or file table expected)" ); |
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471 Files.createLink( file.toPath(), dest.toPath() ); |
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472 } |
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473 |
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474 public void symlink_to(Luan luan,Object destObj) throws LuanException, IOException { |
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475 File dest = objToFile(luan,destObj); |
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476 if( dest==null ) |
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477 throw new LuanException( "bad argument #1 to 'symlink_to' (string or file table expected)" ); |
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478 Files.createSymbolicLink( file.toPath(), dest.toPath() ); |
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479 } |
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480 |
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481 public LuanFile canonical(Luan luan) throws LuanException, IOException { |
1280 | 482 return new LuanFile(luan,file.getCanonicalFile()); |
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483 } |
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484 |
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485 public LuanFile create_temp_file(Luan luan,String prefix,String suffix) throws LuanException, IOException { |
749
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486 File tmp = File.createTempFile(prefix,suffix,file); |
1280 | 487 return new LuanFile(luan,tmp); |
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488 } |
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489 |
1473 | 490 public void delete() throws IOException { |
1475 | 491 IoUtils.deleteRecursively(file); |
751
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492 } |
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493 |
752 | 494 public void mkdir() throws LuanException { |
495 if( !file.isDirectory() ) { | |
496 if( !file.mkdirs() ) | |
497 throw new LuanException("couldn't make directory "+file); | |
498 } | |
499 } | |
500 | |
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501 public void set_last_modified(long time) throws LuanException { |
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502 if( !file.setLastModified(time) ) |
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503 throw new LuanException("couldn't set_last_modified on "+file); |
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504 } |
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505 |
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506 public boolean is_symbolic_link() { |
1475 | 507 return IoUtils.isSymbolicLink(file); |
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508 } |
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509 } |
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510 |
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511 public static LuanUrl classpath(Luan luan,String name) throws LuanException { |
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512 if( name.contains("//") ) |
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513 return null; |
264
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514 String path = name; |
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515 check(luan,"classpath:"+path); |
260
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516 URL url; |
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517 if( !path.contains("#") ) { |
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518 url = ClassLoader.getSystemResource(path); |
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519 } else { |
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520 String[] a = path.split("#"); |
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521 url = ClassLoader.getSystemResource(a[0]); |
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522 if( url==null ) { |
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523 for( int i=1; i<a.length; i++ ) { |
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524 url = ClassLoader.getSystemResource(a[0]+"/"+a[i]); |
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525 if( url != null ) { |
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526 try { |
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527 url = new URL(url,"."); |
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528 } catch(MalformedURLException e) { |
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529 throw new RuntimeException(e); |
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530 } |
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531 break; |
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532 } |
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533 } |
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534 } |
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535 } |
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536 if( url != null ) |
1280 | 537 return new LuanUrl(url,null); |
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538 |
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539 return null; |
260
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540 } |
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541 |
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542 |
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543 public static class BaseOs extends LuanIO { |
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544 private final String cmd; |
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545 final File dir; |
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546 Process proc; |
734 | 547 |
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548 private BaseOs(Luan luan,String cmd,LuanTable options) throws IOException, LuanException { |
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549 this.cmd = cmd; |
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550 File dir = null; |
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551 if( options != null ) { |
1267 | 552 Map map = options.asMap(); |
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553 Object obj = map.remove("dir"); |
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554 dir = objToFile(luan,obj); |
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555 if( dir==null ) |
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556 throw new LuanException( "bad option 'dir' (string or file table expected)" ); |
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557 if( !map.isEmpty() ) |
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558 throw new LuanException( "unrecognized options: "+map ); |
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559 } |
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560 this.dir = dir; |
734 | 561 } |
562 | |
1335 | 563 @Override public InputStream inputStream() throws IOException { |
734 | 564 return proc.getInputStream(); |
565 } | |
566 | |
567 @Override OutputStream outputStream() throws IOException { | |
568 return proc.getOutputStream(); | |
569 } | |
570 | |
571 @Override public String to_string() { | |
572 return proc.toString(); | |
573 } | |
574 | |
575 @Override public String to_uri_string() { | |
576 throw new UnsupportedOperationException(); | |
577 } | |
578 | |
1335 | 579 @Override public boolean exists() { |
734 | 580 return true; |
581 } | |
582 | |
583 public void wait_for() | |
584 throws IOException, LuanException | |
585 { | |
586 try { | |
587 proc.waitFor(); | |
588 } catch(InterruptedException e) { | |
589 throw new RuntimeException(e); | |
590 } | |
591 int exitVal = proc.exitValue(); | |
592 if( exitVal != 0 ) { | |
593 Reader err = new InputStreamReader(proc.getErrorStream()); | |
1107 | 594 String error = "exit value "+exitVal+" in: "+cmd+"\n"+Utils.readAll(err); |
734 | 595 err.close(); |
596 throw new LuanException(error); | |
597 } | |
598 } | |
599 | |
1335 | 600 @Override public String read_text() throws IOException, LuanException { |
601 String s = super.read_text(); | |
734 | 602 wait_for(); |
603 return s; | |
604 } | |
605 } | |
606 | |
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607 public static final class LuanOs extends BaseOs { |
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608 public LuanOs(Luan luan,String cmd,LuanTable options) throws IOException, LuanException { |
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609 super(luan,cmd,options); |
1128 | 610 check(luan,"os:"+cmd); |
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611 this.proc = Runtime.getRuntime().exec(cmd,null,dir); |
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612 } |
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613 } |
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614 |
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615 public static final class LuanBash extends BaseOs { |
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616 public LuanBash(Luan luan,String cmd,LuanTable options) throws IOException, LuanException { |
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617 super(luan,cmd,options); |
1128 | 618 check(luan,"bash:"+cmd); |
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619 this.proc = Runtime.getRuntime().exec(new String[]{"bash","-c",cmd},null,dir); |
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620 } |
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621 } |
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622 |
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623 |
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624 public static class LuanInput extends LuanIn { |
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625 private final InputStream in; |
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626 |
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627 public LuanInput(InputStream in) { |
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628 this.in = in; |
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629 } |
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630 |
1335 | 631 @Override public InputStream inputStream() { |
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632 return in; |
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633 } |
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634 |
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635 @Override public String to_string() { |
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636 return "<input_stream>"; |
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637 } |
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638 |
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639 @Override public String to_uri_string() { |
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640 throw new UnsupportedOperationException(); |
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641 } |
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642 |
1335 | 643 @Override public boolean exists() { |
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644 return true; |
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645 } |
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646 }; |
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647 |
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648 |
701 | 649 public static String ip(String domain) { |
650 try { | |
651 return InetAddress.getByName(domain).getHostAddress(); | |
652 } catch(UnknownHostException e) { | |
653 return null; | |
654 } | |
655 } | |
765 | 656 |
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657 public static LuanTable my_ips(Luan luan) throws IOException, LuanException { |
1267 | 658 LuanTable tbl = new LuanTable(luan); |
735 | 659 for( Enumeration<NetworkInterface> e1 = NetworkInterface.getNetworkInterfaces(); e1.hasMoreElements(); ) { |
660 NetworkInterface ni = e1.nextElement(); | |
661 for( Enumeration<InetAddress> e2 = ni.getInetAddresses(); e2.hasMoreElements(); ) { | |
662 InetAddress ia = e2.nextElement(); | |
663 if( ia instanceof Inet4Address ) | |
1330 | 664 tbl.put(ia.getHostAddress(),true); |
735 | 665 } |
666 } | |
667 return tbl; | |
668 } | |
765 | 669 |
1444 | 670 public static LuanTable dns_lookup(Luan luan,String domain,String type) |
671 throws NamingException | |
672 { | |
673 LuanTable tbl = new LuanTable(luan); | |
674 InitialDirContext idc = new InitialDirContext(); | |
675 Attribute attribute; | |
676 try { | |
677 attribute = idc.getAttributes("dns:/" + domain, new String[] {type}).get(type); | |
678 } catch(NameNotFoundException e) { | |
679 return tbl; | |
680 } | |
681 if( attribute==null ) | |
682 return tbl; | |
683 final int n = attribute.size(); | |
684 for( int i=0; i<n; i++ ) { | |
685 Object obj = attribute.get(i); | |
686 tbl.rawInsert(i+1,obj); | |
687 } | |
688 return tbl; | |
689 } | |
690 | |
706 | 691 |
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692 private static void check(Luan luan,String name) throws LuanException { |
1330 | 693 Luan.checkSecurity(luan,"uri",name); |
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694 } |
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695 |
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696 |
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697 private void IoLuan() {} // never |
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698 } |