annotate src/goodjava/io/IoUtils.java @ 1516:70a55f49b98e

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author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 08 Jun 2020 21:54:31 -0600
parents 0ba144491a42
children f24a9ba7551e
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1 package goodjava.io;
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2
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3 import java.io.File;
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4 import java.io.InputStream;
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5 import java.io.OutputStream;
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6 import java.io.Reader;
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7 import java.io.InputStreamReader;
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8 import java.io.Writer;
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9 import java.io.StringWriter;
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10 import java.io.IOException;
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11 import java.nio.file.Files;
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12 import java.security.Security;
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13 import javax.net.ssl.SSLSocketFactory;
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14 import javax.net.ssl.SSLServerSocketFactory;
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15 import goodjava.logging.Logger;
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16 import goodjava.logging.LoggerFactory;
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17
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18
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19 public final class IoUtils {
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20 private static final Logger logger = LoggerFactory.getLogger(IoUtils.class);
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21
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22 private IoUtils() {} // never
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23
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24 public static void move( File from, File to ) throws IOException {
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25 Files.move( from.toPath(), to.toPath() );
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26 }
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27
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28 public static void delete(File file) throws IOException {
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29 Files.deleteIfExists( file.toPath() );
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30 }
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31
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32 public static void mkdirs(File file) throws IOException {
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33 Files.createDirectories( file.toPath() );
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34 }
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35
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36 public static boolean isSymbolicLink(File file) {
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37 return Files.isSymbolicLink(file.toPath());
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38 }
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39
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40 public static void deleteRecursively(File file) throws IOException {
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41 if( file.isDirectory() && !isSymbolicLink(file) ) {
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42 for( File f : file.listFiles() ) {
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43 deleteRecursively(f);
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44 }
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45 }
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46 delete(file);
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47 }
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48
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49 public static void link(File existing,File link) throws IOException {
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50 Files.createLink( link.toPath(), existing.toPath() );
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51 }
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52
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53 public static void symlink(File existing,File link) throws IOException {
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54 Files.createSymbolicLink( link.toPath(), existing.toPath() );
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55 }
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56
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57 public static void copyAll(InputStream in,OutputStream out)
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58 throws IOException
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59 {
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60 byte[] a = new byte[8192];
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61 int n;
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62 while( (n=in.read(a)) != -1 ) {
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63 out.write(a,0,n);
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64 }
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65 in.close();
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66 }
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67
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68 public static void copyAll(Reader in,Writer out)
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69 throws IOException
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70 {
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71 char[] a = new char[8192];
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72 int n;
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73 while( (n=in.read(a)) != -1 ) {
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74 out.write(a,0,n);
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75 }
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76 in.close();
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77 }
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78
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79 public static String readAll(Reader in)
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80 throws IOException
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81 {
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82 StringWriter sw = new StringWriter();
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83 copyAll(in,sw);
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84 return sw.toString();
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85 }
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86
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87 public static long checksum(InputStream in) throws IOException {
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88 long cs = 0;
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89 int c;
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90 while( (c=in.read()) != -1 ) {
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91 cs = 31 * cs + c;
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92 }
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93 in.close();
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94 return cs;
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95 }
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98
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99 public static class ProcException extends IOException {
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100 private ProcException(String msg) {
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101 super(msg);
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102 }
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103 }
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104
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105 public static void waitFor(Process proc)
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106 throws IOException, ProcException
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107 {
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108 try {
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109 proc.waitFor();
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110 } catch(InterruptedException e) {
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111 throw new RuntimeException(e);
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112 }
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113 int exitVal = proc.exitValue();
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114 if( exitVal != 0 ) {
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115 StringWriter sw = new StringWriter();
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116 copyAll( new InputStreamReader(proc.getInputStream()), sw );
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117 copyAll( new InputStreamReader(proc.getErrorStream()), sw );
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118 String error = sw.toString();
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119 throw new ProcException(error);
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120 }
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121 }
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122
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123
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124 static {
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125 // undo restrictions of modern scum
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126 Security.setProperty("jdk.tls.disabledAlgorithms","SSLv3, RC4, DES, MD5withRSA, DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC");
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127 }
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128
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129 public static SSLSocketFactory getSSLSocketFactory() {
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130 return (SSLSocketFactory)SSLSocketFactory.getDefault();
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131 }
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132
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133 public static SSLServerSocketFactory getSSLServerSocketFactory() {
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134 return (SSLServerSocketFactory)SSLServerSocketFactory.getDefault();
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135 }
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136
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137 }