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view src/goodjava/io/IoUtils.java @ 1754:d179810c6148
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sat, 04 Feb 2023 22:53:05 -0700 |
parents | 2dbcc8360a3e |
children | 745f756e719b |
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package goodjava.io; import java.io.File; import java.io.InputStream; import java.io.OutputStream; import java.io.Reader; import java.io.InputStreamReader; import java.io.Writer; import java.io.StringWriter; import java.io.IOException; import java.net.InetAddress; import java.net.Inet4Address; import java.net.NetworkInterface; import java.nio.file.Files; import java.nio.file.attribute.FileTime; import java.security.Security; import java.util.Set; import java.util.HashSet; import java.util.Enumeration; import javax.net.ssl.SSLSocketFactory; import javax.net.ssl.SSLServerSocketFactory; import goodjava.logging.Logger; import goodjava.logging.LoggerFactory; public final class IoUtils { private static final Logger logger = LoggerFactory.getLogger(IoUtils.class); private IoUtils() {} // never public static void move( File from, File to ) throws IOException { Files.move( from.toPath(), to.toPath() ); } public static void copy( File from, File to ) throws IOException { Files.copy( from.toPath(), to.toPath() ); } public static void delete(File file) throws IOException { Files.deleteIfExists( file.toPath() ); } public static void mkdirs(File file) throws IOException { Files.createDirectories( file.toPath() ); } public static boolean isSymbolicLink(File file) { return Files.isSymbolicLink(file.toPath()); } public static void deleteRecursively(File file) throws IOException { if( file.isDirectory() && !isSymbolicLink(file) ) { for( File f : file.listFiles() ) { deleteRecursively(f); } } delete(file); } public static void link(File existing,File link) throws IOException { Files.createLink( link.toPath(), existing.toPath() ); } public static void symlink(File existing,File link) throws IOException { Files.createSymbolicLink( link.toPath(), existing.toPath() ); } public static long getCreationTime(File f) throws IOException { return ((FileTime)Files.getAttribute(f.toPath(),"creationTime")).toMillis(); } public static void copyAll(InputStream in,OutputStream out) throws IOException { byte[] a = new byte[8192]; int n; while( (n=in.read(a)) != -1 ) { out.write(a,0,n); } in.close(); } public static void copyAll(Reader in,Writer out) throws IOException { char[] a = new char[8192]; int n; while( (n=in.read(a)) != -1 ) { out.write(a,0,n); } in.close(); } public static String readAll(Reader in) throws IOException { StringWriter sw = new StringWriter(); copyAll(in,sw); return sw.toString(); } public static long checksum(InputStream in) throws IOException { long cs = 0; int c; while( (c=in.read()) != -1 ) { cs = 31 * cs + c; } in.close(); return cs; } public static Set<InetAddress> getInetAddresses() throws IOException { Set<InetAddress> set = new HashSet<InetAddress>(); for( Enumeration<NetworkInterface> e1 = NetworkInterface.getNetworkInterfaces(); e1.hasMoreElements(); ) { NetworkInterface ni = e1.nextElement(); for( Enumeration<InetAddress> e2 = ni.getInetAddresses(); e2.hasMoreElements(); ) { InetAddress ia = e2.nextElement(); set.add(ia); } } return set; } public static class ProcException extends IOException { private ProcException(String msg) { super(msg); } } public static void waitFor(Process proc) throws IOException, ProcException { try { proc.waitFor(); } catch(InterruptedException e) { throw new RuntimeException(e); } int exitVal = proc.exitValue(); if( exitVal != 0 ) { StringWriter sw = new StringWriter(); try { copyAll( new InputStreamReader(proc.getInputStream()), sw ); } catch(IOException e) {} copyAll( new InputStreamReader(proc.getErrorStream()), sw ); String error = sw.toString(); throw new ProcException(error); } } static { // undo restrictions of modern scum Security.setProperty("jdk.tls.disabledAlgorithms","SSLv3, RC4, DES, MD5withRSA, DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC"); } public static SSLSocketFactory getSSLSocketFactory() { return (SSLSocketFactory)SSLSocketFactory.getDefault(); } public static SSLServerSocketFactory getSSLServerSocketFactory() { return (SSLServerSocketFactory)SSLServerSocketFactory.getDefault(); } }