Mercurial Hosting > luan
annotate src/luan/modules/IoLuan.java @ 1508:86c5e7000ecf
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sat, 16 May 2020 17:56:02 -0600 |
parents | e66e3d50b289 |
children | 0ba144491a42 |
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; |
735 | 28 import java.util.Enumeration; |
706 | 29 import java.util.Map; |
1444 | 30 import javax.naming.NamingException; |
31 import javax.naming.NameNotFoundException; | |
32 import javax.naming.directory.Attribute; | |
33 import javax.naming.directory.InitialDirContext; | |
1473 | 34 import goodjava.io.IoUtils; |
1330 | 35 import luan.Luan; |
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36 import luan.LuanTable; |
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37 import luan.LuanFunction; |
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38 import luan.LuanException; |
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39 import luan.modules.url.LuanUrl; |
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40 |
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41 |
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42 public final class IoLuan { |
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43 |
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44 public static String read_console_line(String prompt) throws IOException { |
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45 if( prompt==null ) |
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46 prompt = "> "; |
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47 return System.console().readLine(prompt); |
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48 } |
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49 |
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50 |
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51 public interface LuanWriter { |
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52 public Object out(); |
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53 public void write(Object... args) throws LuanException, IOException; |
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54 public void close() throws IOException; |
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55 } |
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56 |
1280 | 57 public static LuanWriter luanWriter(final PrintStream out) { |
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58 return new LuanWriter() { |
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59 |
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60 public Object out() { |
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61 return out; |
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62 } |
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63 |
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64 public void write(Object... args) throws LuanException { |
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65 for( Object obj : args ) { |
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66 out.print( Luan.luanToString(obj) ); |
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67 } |
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68 } |
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69 |
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70 public void close() { |
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71 out.close(); |
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72 } |
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73 }; |
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74 } |
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75 |
1280 | 76 public static LuanWriter luanWriter(final Writer out) { |
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77 return new LuanWriter() { |
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78 |
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79 public Object out() { |
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80 return out; |
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81 } |
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82 |
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83 public void write(Object... args) throws LuanException, IOException { |
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84 for( Object obj : args ) { |
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85 out.write( Luan.luanToString(obj) ); |
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86 } |
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87 } |
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88 |
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89 public void close() throws IOException { |
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90 out.close(); |
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91 } |
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92 }; |
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93 } |
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94 |
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95 static LuanFunction lines(final BufferedReader in) { |
1335 | 96 return new LuanFunction(false) { |
97 @Override public Object call(Object[] args) throws LuanException { | |
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98 try { |
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99 if( args.length > 0 ) { |
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100 if( args.length > 1 || !"close".equals(args[0]) ) |
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101 throw new LuanException( "the only argument allowed is 'close'" ); |
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102 in.close(); |
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103 return null; |
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104 } |
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105 String rtn = in.readLine(); |
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106 if( rtn==null ) |
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107 in.close(); |
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108 return rtn; |
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109 } catch(IOException e) { |
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110 throw new LuanException(e); |
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111 } |
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112 } |
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113 }; |
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114 } |
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115 |
116
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116 static LuanFunction blocks(final InputStream in,final int blockSize) { |
1335 | 117 return new LuanFunction(false) { |
116
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118 final byte[] a = new byte[blockSize]; |
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119 |
1335 | 120 @Override public Object call(Object[] args) throws LuanException { |
116
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121 try { |
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122 if( args.length > 0 ) { |
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123 if( args.length > 1 || !"close".equals(args[0]) ) |
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124 throw new LuanException( "the only argument allowed is 'close'" ); |
116
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125 in.close(); |
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126 return null; |
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127 } |
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128 if( in.read(a) == -1 ) { |
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129 in.close(); |
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130 return null; |
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131 } |
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132 return a; |
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133 } catch(IOException e) { |
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134 throw new LuanException(e); |
116
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135 } |
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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 private static File objToFile(Luan luan,Object obj) throws LuanException { |
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142 if( obj instanceof String ) { |
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143 String fileName = (String)obj; |
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144 check(luan,"file:"+fileName); |
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145 return new File(fileName); |
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146 } |
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147 if( obj instanceof LuanTable ) { |
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148 LuanTable t = (LuanTable)obj; |
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149 Object java = t.rawGet("java"); |
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150 if( java instanceof LuanFile ) { |
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151 LuanFile luanFile = (LuanFile)java; |
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152 return luanFile.file; |
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153 } |
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154 } |
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155 return null; |
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156 } |
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157 |
125
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158 |
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159 public static abstract class LuanIn { |
1278 | 160 protected String charset = null; |
161 | |
1335 | 162 public abstract InputStream inputStream() throws IOException, LuanException; |
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163 public abstract String to_string(); |
705 | 164 public abstract String to_uri_string(); |
125
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165 |
1335 | 166 public Reader reader() throws IOException, LuanException { |
167 InputStream in = inputStream(); | |
1278 | 168 return charset==null ? new InputStreamReader(in) : new InputStreamReader(in,charset); |
314
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169 } |
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170 |
1335 | 171 public String read_text() throws IOException, LuanException { |
172 Reader in = reader(); | |
125
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173 String s = Utils.readAll(in); |
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174 return s; |
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175 } |
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176 |
1335 | 177 public byte[] read_binary() throws IOException, LuanException { |
178 InputStream in = inputStream(); | |
125
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179 byte[] a = Utils.readAll(in); |
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180 return a; |
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181 } |
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182 |
1335 | 183 public LuanFunction read_lines() throws IOException, LuanException { |
184 return lines(new BufferedReader(reader())); | |
125
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185 } |
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186 |
1335 | 187 public LuanFunction read_blocks(Integer blockSize) throws IOException, LuanException { |
125
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188 int n = blockSize!=null ? blockSize : Utils.bufSize; |
1335 | 189 return blocks(inputStream(),n); |
125
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190 } |
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191 |
1335 | 192 public boolean exists() throws IOException, LuanException { |
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193 try { |
1335 | 194 inputStream().close(); |
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195 return true; |
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196 } catch(FileNotFoundException e) { |
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197 return false; |
1251 | 198 } catch(UnknownHostException e) { |
199 return false; | |
1349 | 200 } catch(LuanException e) { |
201 if( e.getCause() instanceof FileNotFoundException ) | |
202 return false; | |
203 throw e; | |
265
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204 } |
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205 } |
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206 |
1335 | 207 public long checksum() throws IOException, LuanException { |
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208 return IoUtils.checksum( new BufferedInputStream(inputStream()) ); |
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209 } |
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210 |
1278 | 211 public String charset() { |
212 return charset; | |
213 } | |
214 | |
215 public void set_charset(String charset) { | |
216 this.charset = charset; | |
217 } | |
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218 } |
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219 |
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220 public static final LuanIn defaultStdin = new LuanIn() { |
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221 |
1335 | 222 @Override public InputStream inputStream() { |
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223 return System.in; |
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224 } |
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225 |
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226 @Override public String to_string() { |
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227 return "<stdin>"; |
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228 } |
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229 |
705 | 230 @Override public String to_uri_string() { |
231 return "stdin:"; | |
232 } | |
233 | |
1335 | 234 @Override public String read_text() throws IOException { |
261
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235 return Utils.readAll(new InputStreamReader(System.in)); |
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236 } |
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237 |
1335 | 238 @Override public byte[] read_binary() throws IOException { |
261
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239 return Utils.readAll(System.in); |
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240 } |
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241 |
1335 | 242 @Override public boolean exists() { |
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243 return true; |
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244 } |
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245 }; |
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246 |
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247 public static abstract class LuanIO extends LuanIn { |
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248 abstract OutputStream outputStream() throws IOException; |
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249 |
1278 | 250 private Writer writer() throws IOException { |
251 OutputStream out = outputStream(); | |
252 return charset==null ? new OutputStreamWriter(out) : new OutputStreamWriter(out,charset); | |
253 } | |
254 | |
1335 | 255 public void write(Object obj) throws LuanException, IOException { |
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256 if( obj instanceof String ) { |
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257 String s = (String)obj; |
1278 | 258 Writer out = writer(); |
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259 out.write(s); |
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260 out.close(); |
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261 return; |
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262 } |
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263 if( obj instanceof byte[] ) { |
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264 byte[] a = (byte[])obj; |
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265 OutputStream out = outputStream(); |
1493 | 266 out.write(a); |
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267 out.close(); |
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268 return; |
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269 } |
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270 if( obj instanceof LuanTable ) { |
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271 LuanTable t = (LuanTable)obj; |
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272 Object java = t.rawGet("java"); |
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273 if( java instanceof LuanIn ) { |
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274 LuanIn luanIn = (LuanIn)java; |
1335 | 275 InputStream in = luanIn.inputStream(); |
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276 OutputStream out = outputStream(); |
1493 | 277 IoUtils.copyAll(in,out); |
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278 out.close(); |
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279 return; |
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280 } |
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281 } |
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282 throw new LuanException( "bad argument #1 to 'write' (string or binary or Io.uri expected)" ); |
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283 } |
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284 |
1280 | 285 public LuanWriter text_writer() throws IOException { |
286 return luanWriter(new BufferedWriter(writer())); | |
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287 } |
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288 |
1280 | 289 public OutputStream binary_writer() throws IOException { |
290 return new BufferedOutputStream(outputStream()); | |
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291 } |
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292 |
1335 | 293 public void write_text(Object... args) throws LuanException, IOException { |
1470 | 294 LuanWriter luanWriter = text_writer(); |
1335 | 295 luanWriter.write(args); |
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296 luanWriter.close(); |
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297 } |
1470 | 298 |
299 public void write_binary(byte[] bytes) throws LuanException, IOException { | |
300 OutputStream out = binary_writer(); | |
301 out.write(bytes); | |
302 out.close(); | |
303 } | |
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304 } |
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305 |
1280 | 306 public static final LuanIO nullIO = new LuanIO() { |
590 | 307 private final InputStream in = new InputStream() { |
308 @Override public int read() { | |
309 return -1; | |
310 } | |
311 }; | |
312 private final OutputStream out = new OutputStream() { | |
313 @Override public void write(int b) {} | |
314 }; | |
315 | |
1335 | 316 @Override public InputStream inputStream() { |
590 | 317 return in; |
318 } | |
319 | |
320 @Override OutputStream outputStream() { | |
321 return out; | |
322 } | |
323 | |
324 @Override public String to_string() { | |
325 return "<null>"; | |
326 } | |
327 | |
705 | 328 @Override public String to_uri_string() { |
329 return "null:"; | |
330 } | |
331 | |
590 | 332 }; |
333 | |
421
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334 public static final class LuanString extends LuanIO { |
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335 private String s; |
314
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336 |
1280 | 337 public LuanString(String s) throws LuanException { |
338 Utils.checkNotNull(s); | |
314
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339 this.s = s; |
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340 } |
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341 |
1335 | 342 @Override public InputStream inputStream() { |
421
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343 throw new UnsupportedOperationException(); |
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344 } |
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345 |
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346 @Override OutputStream outputStream() { |
314
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347 throw new UnsupportedOperationException(); |
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348 } |
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349 |
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350 @Override public String to_string() { |
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351 return "<string>"; |
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352 } |
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353 |
705 | 354 @Override public String to_uri_string() { |
355 return "string:" + s; | |
356 } | |
357 | |
1335 | 358 @Override public Reader reader() { |
314
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359 return new StringReader(s); |
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360 } |
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361 |
1335 | 362 @Override public String read_text() { |
314
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363 return s; |
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364 } |
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365 |
1335 | 366 @Override public boolean exists() { |
314
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367 return true; |
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368 } |
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369 |
1280 | 370 @Override public LuanWriter text_writer() { |
371 return new LuanWriter() { | |
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372 private final Writer out = new StringWriter(); |
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373 |
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374 public Object out() { |
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375 return out; |
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376 } |
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377 |
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378 public void write(Object... args) throws LuanException, IOException { |
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379 for( Object obj : args ) { |
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380 out.write( Luan.luanToString(obj) ); |
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381 } |
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382 } |
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383 |
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384 public void close() throws IOException { |
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385 s = out.toString(); |
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386 } |
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387 }; |
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388 } |
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389 } |
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390 |
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391 public static final class LuanFile extends LuanIO { |
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392 public final File file; |
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393 |
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394 public LuanFile(Luan luan,String path) throws LuanException { |
1280 | 395 this(luan,new File(path)); |
396 } | |
397 | |
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398 private LuanFile(Luan luan,File file) throws LuanException { |
203
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399 this(file); |
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400 check(luan,"file:"+file.toString()); |
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401 } |
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402 |
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403 private LuanFile(File file) { |
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404 this.file = file; |
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405 } |
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406 |
1335 | 407 @Override public InputStream inputStream() throws IOException { |
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408 return new FileInputStream(file); |
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409 } |
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410 |
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411 @Override OutputStream outputStream() throws IOException { |
125
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412 return new FileOutputStream(file); |
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413 } |
143
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414 |
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415 @Override public String to_string() { |
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416 return file.toString(); |
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417 } |
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418 |
705 | 419 @Override public String to_uri_string() { |
420 return "file:" + file.toString(); | |
421 } | |
422 | |
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423 public LuanFile child(Luan luan,String name) throws LuanException { |
1280 | 424 return new LuanFile(luan,new File(file,name)); |
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425 } |
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426 |
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427 public LuanTable children(Luan luan) throws LuanException { |
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428 File[] files = file.listFiles(); |
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429 if( files==null ) |
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430 return null; |
1267 | 431 LuanTable list = new LuanTable(luan); |
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432 for( File f : files ) { |
1280 | 433 list.rawPut(list.rawLength()+1,new LuanFile(luan,f)); |
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434 } |
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435 return list; |
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436 } |
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437 |
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438 public LuanFile parent(Luan luan) throws LuanException, IOException { |
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439 File parent = file.getParentFile(); |
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440 if( parent==null ) |
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441 parent = file.getCanonicalFile().getParentFile(); |
1280 | 442 return new LuanFile(luan,parent); |
323
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443 } |
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444 |
1335 | 445 @Override public boolean exists() { |
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446 return file.exists(); |
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447 } |
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448 |
1473 | 449 public void rename_to(Luan luan,Object destObj) throws LuanException, IOException { |
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450 File dest = objToFile(luan,destObj); |
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451 if( dest==null ) |
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452 throw new LuanException( "bad argument #1 to 'rename_to' (string or file table expected)" ); |
1473 | 453 IoUtils.move(file,dest); |
293
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454 } |
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455 |
1497 | 456 public void link_from(Luan luan,Object linkObj) throws LuanException, IOException { |
457 File link = objToFile(luan,linkObj); | |
458 if( link==null ) | |
459 throw new LuanException( "bad argument #1 to 'link_from' (string or file table expected)" ); | |
460 IoUtils.link(file,link); | |
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461 } |
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462 |
1497 | 463 public void symlink_from(Luan luan,Object linkObj) throws LuanException, IOException { |
464 File link = objToFile(luan,linkObj); | |
465 if( link==null ) | |
466 throw new LuanException( "bad argument #1 to 'symlink_from' (string or file table expected)" ); | |
467 IoUtils.symlink(file,link); | |
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468 } |
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469 |
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470 public LuanFile canonical(Luan luan) throws LuanException, IOException { |
1280 | 471 return new LuanFile(luan,file.getCanonicalFile()); |
310
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472 } |
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473 |
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474 public LuanFile create_temp_file(Luan luan,String prefix,String suffix) throws LuanException, IOException { |
749
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475 File tmp = File.createTempFile(prefix,suffix,file); |
1280 | 476 return new LuanFile(luan,tmp); |
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477 } |
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478 |
1473 | 479 public void delete() throws IOException { |
1475 | 480 IoUtils.deleteRecursively(file); |
751
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481 } |
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482 |
1501 | 483 public void mkdir() throws IOException { |
484 IoUtils.mkdirs(file); | |
752 | 485 } |
486 | |
768
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487 public void set_last_modified(long time) throws LuanException { |
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488 if( !file.setLastModified(time) ) |
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489 throw new LuanException("couldn't set_last_modified on "+file); |
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490 } |
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491 |
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492 public boolean is_symbolic_link() { |
1475 | 493 return IoUtils.isSymbolicLink(file); |
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494 } |
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495 } |
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496 |
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497 public static LuanUrl classpath(Luan luan,String name) throws LuanException { |
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498 if( name.contains("//") ) |
260
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499 return null; |
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500 String path = name; |
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501 check(luan,"classpath:"+path); |
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502 URL url; |
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503 if( !path.contains("#") ) { |
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504 url = ClassLoader.getSystemResource(path); |
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505 } else { |
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506 String[] a = path.split("#"); |
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507 url = ClassLoader.getSystemResource(a[0]); |
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508 if( url==null ) { |
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509 for( int i=1; i<a.length; i++ ) { |
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510 url = ClassLoader.getSystemResource(a[0]+"/"+a[i]); |
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511 if( url != null ) { |
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512 try { |
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513 url = new URL(url,"."); |
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514 } catch(MalformedURLException e) { |
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515 throw new RuntimeException(e); |
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516 } |
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517 break; |
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518 } |
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519 } |
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520 } |
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521 } |
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522 if( url != null ) |
1280 | 523 return new LuanUrl(url,null); |
264
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524 |
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525 return null; |
260
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526 } |
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527 |
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528 |
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529 public static class BaseOs extends LuanIO { |
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530 private final String cmd; |
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531 final File dir; |
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532 Process proc; |
734 | 533 |
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534 private BaseOs(Luan luan,String cmd,LuanTable options) throws IOException, LuanException { |
761
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535 this.cmd = cmd; |
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536 File dir = null; |
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537 if( options != null ) { |
1267 | 538 Map map = options.asMap(); |
761
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539 Object obj = map.remove("dir"); |
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540 dir = objToFile(luan,obj); |
761
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541 if( dir==null ) |
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542 throw new LuanException( "bad option 'dir' (string or file table expected)" ); |
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543 if( !map.isEmpty() ) |
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544 throw new LuanException( "unrecognized options: "+map ); |
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545 } |
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546 this.dir = dir; |
734 | 547 } |
548 | |
1335 | 549 @Override public InputStream inputStream() throws IOException { |
734 | 550 return proc.getInputStream(); |
551 } | |
552 | |
553 @Override OutputStream outputStream() throws IOException { | |
554 return proc.getOutputStream(); | |
555 } | |
556 | |
557 @Override public String to_string() { | |
558 return proc.toString(); | |
559 } | |
560 | |
561 @Override public String to_uri_string() { | |
562 throw new UnsupportedOperationException(); | |
563 } | |
564 | |
1335 | 565 @Override public boolean exists() { |
734 | 566 return true; |
567 } | |
568 | |
569 public void wait_for() | |
570 throws IOException, LuanException | |
571 { | |
572 try { | |
573 proc.waitFor(); | |
574 } catch(InterruptedException e) { | |
575 throw new RuntimeException(e); | |
576 } | |
577 int exitVal = proc.exitValue(); | |
578 if( exitVal != 0 ) { | |
579 Reader err = new InputStreamReader(proc.getErrorStream()); | |
1107 | 580 String error = "exit value "+exitVal+" in: "+cmd+"\n"+Utils.readAll(err); |
734 | 581 err.close(); |
582 throw new LuanException(error); | |
583 } | |
584 } | |
585 | |
1335 | 586 @Override public String read_text() throws IOException, LuanException { |
587 String s = super.read_text(); | |
734 | 588 wait_for(); |
589 return s; | |
590 } | |
591 } | |
592 | |
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593 public static final class LuanOs extends BaseOs { |
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594 public LuanOs(Luan luan,String cmd,LuanTable options) throws IOException, LuanException { |
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595 super(luan,cmd,options); |
1128 | 596 check(luan,"os:"+cmd); |
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597 this.proc = Runtime.getRuntime().exec(cmd,null,dir); |
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598 } |
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599 } |
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600 |
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601 public static final class LuanBash extends BaseOs { |
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602 public LuanBash(Luan luan,String cmd,LuanTable options) throws IOException, LuanException { |
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603 super(luan,cmd,options); |
1128 | 604 check(luan,"bash:"+cmd); |
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605 this.proc = Runtime.getRuntime().exec(new String[]{"bash","-c",cmd},null,dir); |
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606 } |
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607 } |
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608 |
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609 |
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610 public static class LuanInput extends LuanIn { |
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611 private final InputStream in; |
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612 |
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613 public LuanInput(InputStream in) { |
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614 this.in = in; |
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615 } |
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616 |
1335 | 617 @Override public InputStream inputStream() { |
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618 return in; |
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619 } |
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620 |
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621 @Override public String to_string() { |
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622 return "<input_stream>"; |
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623 } |
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624 |
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625 @Override public String to_uri_string() { |
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626 throw new UnsupportedOperationException(); |
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627 } |
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628 |
1335 | 629 @Override public boolean exists() { |
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630 return true; |
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631 } |
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632 }; |
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633 |
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634 |
701 | 635 public static String ip(String domain) { |
636 try { | |
637 return InetAddress.getByName(domain).getHostAddress(); | |
638 } catch(UnknownHostException e) { | |
639 return null; | |
640 } | |
641 } | |
765 | 642 |
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643 public static LuanTable my_ips(Luan luan) throws IOException, LuanException { |
1267 | 644 LuanTable tbl = new LuanTable(luan); |
735 | 645 for( Enumeration<NetworkInterface> e1 = NetworkInterface.getNetworkInterfaces(); e1.hasMoreElements(); ) { |
646 NetworkInterface ni = e1.nextElement(); | |
647 for( Enumeration<InetAddress> e2 = ni.getInetAddresses(); e2.hasMoreElements(); ) { | |
648 InetAddress ia = e2.nextElement(); | |
649 if( ia instanceof Inet4Address ) | |
1330 | 650 tbl.put(ia.getHostAddress(),true); |
735 | 651 } |
652 } | |
653 return tbl; | |
654 } | |
765 | 655 |
1444 | 656 public static LuanTable dns_lookup(Luan luan,String domain,String type) |
657 throws NamingException | |
658 { | |
659 LuanTable tbl = new LuanTable(luan); | |
660 InitialDirContext idc = new InitialDirContext(); | |
661 Attribute attribute; | |
662 try { | |
663 attribute = idc.getAttributes("dns:/" + domain, new String[] {type}).get(type); | |
664 } catch(NameNotFoundException e) { | |
665 return tbl; | |
666 } | |
667 if( attribute==null ) | |
668 return tbl; | |
669 final int n = attribute.size(); | |
670 for( int i=0; i<n; i++ ) { | |
671 Object obj = attribute.get(i); | |
672 tbl.rawInsert(i+1,obj); | |
673 } | |
674 return tbl; | |
675 } | |
676 | |
706 | 677 |
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678 private static void check(Luan luan,String name) throws LuanException { |
1330 | 679 Luan.checkSecurity(luan,"uri",name); |
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680 } |
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681 |
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682 |
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683 private void IoLuan() {} // never |
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684 } |