Mercurial Hosting > luan
annotate src/goodjava/io/IoUtils.java @ 1536:34ae786771b6
make Web_search transaction safe
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Fri, 07 Aug 2020 13:34:25 -0600 |
| parents | 0ba144491a42 |
| children | f24a9ba7551e |
| 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; |
| 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; |
| 1509 | 15 import goodjava.logging.Logger; |
| 16 import goodjava.logging.LoggerFactory; | |
| 1473 | 17 |
| 18 | |
| 19 public final class IoUtils { | |
| 1509 | 20 private static final Logger logger = LoggerFactory.getLogger(IoUtils.class); |
| 21 | |
| 1473 | 22 private IoUtils() {} // never |
| 23 | |
| 24 public static void move( File from, File to ) throws IOException { | |
| 25 Files.move( from.toPath(), to.toPath() ); | |
| 26 } | |
| 27 | |
| 28 public static void delete(File file) throws IOException { | |
| 29 Files.deleteIfExists( file.toPath() ); | |
| 30 } | |
| 1475 | 31 |
| 1501 | 32 public static void mkdirs(File file) throws IOException { |
| 33 Files.createDirectories( file.toPath() ); | |
| 34 } | |
| 35 | |
| 1475 | 36 public static boolean isSymbolicLink(File file) { |
| 37 return Files.isSymbolicLink(file.toPath()); | |
| 38 } | |
| 39 | |
| 40 public static void deleteRecursively(File file) throws IOException { | |
| 41 if( file.isDirectory() && !isSymbolicLink(file) ) { | |
| 42 for( File f : file.listFiles() ) { | |
| 43 deleteRecursively(f); | |
| 44 } | |
| 45 } | |
| 46 delete(file); | |
| 47 } | |
| 48 | |
| 1497 | 49 public static void link(File existing,File link) throws IOException { |
| 50 Files.createLink( link.toPath(), existing.toPath() ); | |
| 51 } | |
| 52 | |
| 53 public static void symlink(File existing,File link) throws IOException { | |
| 54 Files.createSymbolicLink( link.toPath(), existing.toPath() ); | |
| 1488 | 55 } |
| 56 | |
| 1494 | 57 public static void copyAll(InputStream in,OutputStream out) |
| 1493 | 58 throws IOException |
| 59 { | |
| 60 byte[] a = new byte[8192]; | |
| 61 int n; | |
| 62 while( (n=in.read(a)) != -1 ) { | |
| 63 out.write(a,0,n); | |
| 64 } | |
| 1499 | 65 in.close(); |
| 1493 | 66 } |
| 67 | |
| 1509 | 68 public static void copyAll(Reader in,Writer out) |
| 69 throws IOException | |
| 70 { | |
| 71 char[] a = new char[8192]; | |
| 72 int n; | |
| 73 while( (n=in.read(a)) != -1 ) { | |
| 74 out.write(a,0,n); | |
| 75 } | |
| 76 in.close(); | |
| 77 } | |
| 78 | |
| 79 public static String readAll(Reader in) | |
| 80 throws IOException | |
| 81 { | |
| 82 StringWriter sw = new StringWriter(); | |
| 83 copyAll(in,sw); | |
| 84 return sw.toString(); | |
| 85 } | |
| 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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96 |
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97 |
| 1509 | 98 |
| 99 public static class ProcException extends IOException { | |
| 100 private ProcException(String msg) { | |
| 101 super(msg); | |
| 102 } | |
| 103 } | |
| 104 | |
| 105 public static void waitFor(Process proc) | |
| 106 throws IOException, ProcException | |
| 107 { | |
| 108 try { | |
| 109 proc.waitFor(); | |
| 110 } catch(InterruptedException e) { | |
| 111 throw new RuntimeException(e); | |
| 112 } | |
| 113 int exitVal = proc.exitValue(); | |
| 114 if( exitVal != 0 ) { | |
| 115 StringWriter sw = new StringWriter(); | |
| 116 copyAll( new InputStreamReader(proc.getInputStream()), sw ); | |
| 117 copyAll( new InputStreamReader(proc.getErrorStream()), sw ); | |
| 118 String error = sw.toString(); | |
| 119 throw new ProcException(error); | |
| 120 } | |
| 121 } | |
| 122 | |
| 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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parents:
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132 |
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d80395468b4e
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parents:
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diff
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133 public static SSLServerSocketFactory getSSLServerSocketFactory() { |
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d80395468b4e
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Franklin Schmidt <fschmidt@gmail.com>
parents:
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diff
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134 return (SSLServerSocketFactory)SSLServerSocketFactory.getDefault(); |
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d80395468b4e
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Franklin Schmidt <fschmidt@gmail.com>
parents:
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135 } |
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parents:
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136 |
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137 } |