annotate src/goodjava/io/IoUtils.java @ 1593:ea62c2316b2e

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author Franklin Schmidt <fschmidt@gmail.com>
date Sat, 20 Mar 2021 22:29:01 -0600
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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.nio.file.attribute.FileTime;
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13 import java.security.Security;
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14 import javax.net.ssl.SSLSocketFactory;
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15 import javax.net.ssl.SSLServerSocketFactory;
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16 import goodjava.logging.Logger;
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17 import goodjava.logging.LoggerFactory;
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19
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20 public final class IoUtils {
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21 private static final Logger logger = LoggerFactory.getLogger(IoUtils.class);
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22
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23 private IoUtils() {} // never
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24
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25 public static void move( File from, File to ) throws IOException {
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26 Files.move( from.toPath(), to.toPath() );
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27 }
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29 public static void delete(File file) throws IOException {
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30 Files.deleteIfExists( file.toPath() );
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31 }
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32
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33 public static void mkdirs(File file) throws IOException {
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34 Files.createDirectories( file.toPath() );
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35 }
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36
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37 public static boolean isSymbolicLink(File file) {
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38 return Files.isSymbolicLink(file.toPath());
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39 }
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40
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41 public static void deleteRecursively(File file) throws IOException {
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42 if( file.isDirectory() && !isSymbolicLink(file) ) {
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43 for( File f : file.listFiles() ) {
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44 deleteRecursively(f);
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45 }
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46 }
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47 delete(file);
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48 }
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49
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50 public static void link(File existing,File link) throws IOException {
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51 Files.createLink( link.toPath(), existing.toPath() );
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52 }
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53
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54 public static void symlink(File existing,File link) throws IOException {
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55 Files.createSymbolicLink( link.toPath(), existing.toPath() );
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56 }
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57
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58 public static long getCreationTime(File f) throws IOException {
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59 return ((FileTime)Files.getAttribute(f.toPath(),"creationTime")).toMillis();
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60 }
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61
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62 public static void copyAll(InputStream in,OutputStream out)
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63 throws IOException
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64 {
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65 byte[] a = new byte[8192];
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66 int n;
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67 while( (n=in.read(a)) != -1 ) {
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68 out.write(a,0,n);
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69 }
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70 in.close();
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71 }
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72
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73 public static void copyAll(Reader in,Writer out)
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74 throws IOException
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75 {
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76 char[] a = new char[8192];
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77 int n;
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78 while( (n=in.read(a)) != -1 ) {
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79 out.write(a,0,n);
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80 }
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81 in.close();
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82 }
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83
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84 public static String readAll(Reader in)
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85 throws IOException
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86 {
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87 StringWriter sw = new StringWriter();
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88 copyAll(in,sw);
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89 return sw.toString();
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90 }
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91
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92 public static long checksum(InputStream in) throws IOException {
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93 long cs = 0;
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94 int c;
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95 while( (c=in.read()) != -1 ) {
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96 cs = 31 * cs + c;
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97 }
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98 in.close();
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99 return cs;
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100 }
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101
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103
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104 public static class ProcException extends IOException {
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105 private ProcException(String msg) {
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106 super(msg);
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107 }
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108 }
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109
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110 public static void waitFor(Process proc)
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111 throws IOException, ProcException
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112 {
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113 try {
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114 proc.waitFor();
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115 } catch(InterruptedException e) {
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116 throw new RuntimeException(e);
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117 }
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118 int exitVal = proc.exitValue();
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119 if( exitVal != 0 ) {
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120 StringWriter sw = new StringWriter();
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121 try {
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122 copyAll( new InputStreamReader(proc.getInputStream()), sw );
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123 } catch(IOException e) {}
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124 copyAll( new InputStreamReader(proc.getErrorStream()), sw );
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125 String error = sw.toString();
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126 throw new ProcException(error);
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127 }
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128 }
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129
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130
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131 static {
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132 // undo restrictions of modern scum
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133 Security.setProperty("jdk.tls.disabledAlgorithms","SSLv3, RC4, DES, MD5withRSA, DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC");
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134 }
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135
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136 public static SSLSocketFactory getSSLSocketFactory() {
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137 return (SSLSocketFactory)SSLSocketFactory.getDefault();
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138 }
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139
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140 public static SSLServerSocketFactory getSSLServerSocketFactory() {
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141 return (SSLServerSocketFactory)SSLServerSocketFactory.getDefault();
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142 }
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143
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144 }