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annotate src/goodjava/io/IoUtils.java @ 2018:5203eb9b0e02
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| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Fri, 03 Oct 2025 16:45:33 -0600 |
| parents | bba3e529e346 |
| children |
| rev | line source |
|---|---|
| 1473 | 1 package goodjava.io; |
| 2 | |
| 3 import java.io.File; | |
| 1493 | 4 import java.io.InputStream; |
| 5 import java.io.OutputStream; | |
| 1509 | 6 import java.io.Reader; |
| 7 import java.io.InputStreamReader; | |
| 8 import java.io.Writer; | |
| 9 import java.io.StringWriter; | |
| 1473 | 10 import java.io.IOException; |
| 1698 | 11 import java.net.InetAddress; |
| 12 import java.net.Inet4Address; | |
| 13 import java.net.NetworkInterface; | |
| 1473 | 14 import java.nio.file.Files; |
| 1548 | 15 import java.nio.file.attribute.FileTime; |
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16 import java.security.Security; |
| 1698 | 17 import java.util.Set; |
| 18 import java.util.HashSet; | |
| 19 import java.util.Enumeration; | |
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20 import javax.net.ssl.SSLSocketFactory; |
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21 import javax.net.ssl.SSLServerSocketFactory; |
| 1509 | 22 import goodjava.logging.Logger; |
| 23 import goodjava.logging.LoggerFactory; | |
| 1473 | 24 |
| 25 | |
| 26 public final class IoUtils { | |
| 1509 | 27 private static final Logger logger = LoggerFactory.getLogger(IoUtils.class); |
| 28 | |
| 1473 | 29 private IoUtils() {} // never |
| 30 | |
| 31 public static void move( File from, File to ) throws IOException { | |
| 32 Files.move( from.toPath(), to.toPath() ); | |
| 33 } | |
| 34 | |
| 1661 | 35 public static void copy( File from, File to ) throws IOException { |
| 36 Files.copy( from.toPath(), to.toPath() ); | |
| 37 } | |
| 38 | |
| 1473 | 39 public static void delete(File file) throws IOException { |
| 40 Files.deleteIfExists( file.toPath() ); | |
| 41 } | |
| 1475 | 42 |
| 1501 | 43 public static void mkdirs(File file) throws IOException { |
| 44 Files.createDirectories( file.toPath() ); | |
| 45 } | |
| 46 | |
| 1475 | 47 public static boolean isSymbolicLink(File file) { |
| 48 return Files.isSymbolicLink(file.toPath()); | |
| 49 } | |
| 50 | |
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51 public static void copyRecursively( File from, File to ) throws IOException { |
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52 copy(from,to); |
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53 if( from.isDirectory() && !isSymbolicLink(from) ) { |
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54 for( File f : from.listFiles() ) { |
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55 copyRecursively( f, new File(to,f.getName()) ); |
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56 } |
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57 } |
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58 } |
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59 |
| 1475 | 60 public static void deleteRecursively(File file) throws IOException { |
| 61 if( file.isDirectory() && !isSymbolicLink(file) ) { | |
| 62 for( File f : file.listFiles() ) { | |
| 63 deleteRecursively(f); | |
| 64 } | |
| 65 } | |
| 66 delete(file); | |
| 67 } | |
| 68 | |
| 1497 | 69 public static void link(File existing,File link) throws IOException { |
| 70 Files.createLink( link.toPath(), existing.toPath() ); | |
| 71 } | |
| 72 | |
| 73 public static void symlink(File existing,File link) throws IOException { | |
| 74 Files.createSymbolicLink( link.toPath(), existing.toPath() ); | |
| 1488 | 75 } |
| 76 | |
| 1548 | 77 public static long getCreationTime(File f) throws IOException { |
| 78 return ((FileTime)Files.getAttribute(f.toPath(),"creationTime")).toMillis(); | |
| 79 } | |
| 80 | |
| 1494 | 81 public static void copyAll(InputStream in,OutputStream out) |
| 1493 | 82 throws IOException |
| 83 { | |
| 2008 | 84 byte[] a = new byte[32768]; |
| 1493 | 85 int n; |
| 86 while( (n=in.read(a)) != -1 ) { | |
| 87 out.write(a,0,n); | |
| 88 } | |
| 1499 | 89 in.close(); |
| 1493 | 90 } |
| 91 | |
| 1509 | 92 public static void copyAll(Reader in,Writer out) |
| 93 throws IOException | |
| 94 { | |
| 2008 | 95 char[] a = new char[32768]; |
| 1509 | 96 int n; |
| 97 while( (n=in.read(a)) != -1 ) { | |
| 98 out.write(a,0,n); | |
| 99 } | |
| 100 in.close(); | |
| 101 } | |
| 102 | |
| 103 public static String readAll(Reader in) | |
| 104 throws IOException | |
| 105 { | |
| 106 StringWriter sw = new StringWriter(); | |
| 107 copyAll(in,sw); | |
| 108 return sw.toString(); | |
| 109 } | |
| 110 | |
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111 public static long checksum(InputStream in) throws IOException { |
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112 long cs = 0; |
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113 int c; |
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114 while( (c=in.read()) != -1 ) { |
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115 cs = 31 * cs + c; |
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116 } |
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117 in.close(); |
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118 return cs; |
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119 } |
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120 |
| 1698 | 121 public static Set<InetAddress> getInetAddresses() throws IOException { |
| 122 Set<InetAddress> set = new HashSet<InetAddress>(); | |
| 123 for( Enumeration<NetworkInterface> e1 = NetworkInterface.getNetworkInterfaces(); e1.hasMoreElements(); ) { | |
| 124 NetworkInterface ni = e1.nextElement(); | |
| 125 for( Enumeration<InetAddress> e2 = ni.getInetAddresses(); e2.hasMoreElements(); ) { | |
| 126 InetAddress ia = e2.nextElement(); | |
| 127 set.add(ia); | |
| 128 } | |
| 129 } | |
| 130 return set; | |
| 131 } | |
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132 |
| 1509 | 133 |
| 134 public static class ProcException extends IOException { | |
| 135 private ProcException(String msg) { | |
| 136 super(msg); | |
| 137 } | |
| 138 } | |
| 139 | |
| 140 public static void waitFor(Process proc) | |
| 141 throws IOException, ProcException | |
| 142 { | |
| 143 try { | |
| 144 proc.waitFor(); | |
| 145 } catch(InterruptedException e) { | |
| 146 throw new RuntimeException(e); | |
| 147 } | |
| 148 int exitVal = proc.exitValue(); | |
| 149 if( exitVal != 0 ) { | |
| 150 StringWriter sw = new StringWriter(); | |
| 1547 | 151 try { |
| 152 copyAll( new InputStreamReader(proc.getInputStream()), sw ); | |
| 153 } catch(IOException e) {} | |
| 1509 | 154 copyAll( new InputStreamReader(proc.getErrorStream()), sw ); |
| 155 String error = sw.toString(); | |
| 156 throw new ProcException(error); | |
| 157 } | |
| 158 } | |
| 159 | |
| 160 | |
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161 static { |
| 1981 | 162 // undo stupid modern restrictions |
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163 Security.setProperty("jdk.tls.disabledAlgorithms","SSLv3, RC4, DES, MD5withRSA, DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC"); |
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164 } |
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165 |
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166 public static SSLSocketFactory getSSLSocketFactory() { |
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167 return (SSLSocketFactory)SSLSocketFactory.getDefault(); |
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168 } |
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169 |
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170 public static SSLServerSocketFactory getSSLServerSocketFactory() { |
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171 return (SSLServerSocketFactory)SSLServerSocketFactory.getDefault(); |
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172 } |
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173 |
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174 } |