| // |
| // ======================================================================== |
| // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.util; |
| import java.io.ByteArrayOutputStream; |
| import java.io.Closeable; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.OutputStream; |
| import java.io.PrintWriter; |
| import java.io.Reader; |
| import java.io.StringWriter; |
| import java.io.Writer; |
| |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| import org.eclipse.jetty.util.thread.QueuedThreadPool; |
| |
| /* ======================================================================== */ |
| /** IO Utilities. |
| * Provides stream handling utilities in |
| * singleton Threadpool implementation accessed by static members. |
| */ |
| public class IO |
| { |
| private static final Logger LOG = Log.getLogger(IO.class); |
| |
| /* ------------------------------------------------------------------- */ |
| public final static String |
| CRLF = "\015\012"; |
| |
| /* ------------------------------------------------------------------- */ |
| public final static byte[] |
| CRLF_BYTES = {(byte)'\015',(byte)'\012'}; |
| |
| /* ------------------------------------------------------------------- */ |
| public static int bufferSize = 64*1024; |
| |
| /* ------------------------------------------------------------------- */ |
| // TODO get rid of this singleton! |
| private static class Singleton { |
| static final QueuedThreadPool __pool=new QueuedThreadPool(); |
| static |
| { |
| try{__pool.start();} |
| catch(Exception e){LOG.warn(e); System.exit(1);} |
| } |
| } |
| |
| /* ------------------------------------------------------------------- */ |
| static class Job implements Runnable |
| { |
| InputStream in; |
| OutputStream out; |
| Reader read; |
| Writer write; |
| |
| Job(InputStream in,OutputStream out) |
| { |
| this.in=in; |
| this.out=out; |
| this.read=null; |
| this.write=null; |
| } |
| Job(Reader read,Writer write) |
| { |
| this.in=null; |
| this.out=null; |
| this.read=read; |
| this.write=write; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /* |
| * @see java.lang.Runnable#run() |
| */ |
| public void run() |
| { |
| try { |
| if (in!=null) |
| copy(in,out,-1); |
| else |
| copy(read,write,-1); |
| } |
| catch(IOException e) |
| { |
| LOG.ignore(e); |
| try{ |
| if (out!=null) |
| out.close(); |
| if (write!=null) |
| write.close(); |
| } |
| catch(IOException e2) |
| { |
| LOG.ignore(e2); |
| } |
| } |
| } |
| } |
| |
| /* ------------------------------------------------------------------- */ |
| /** Copy Stream in to Stream out until EOF or exception. |
| * in own thread |
| */ |
| public static void copyThread(InputStream in, OutputStream out) |
| { |
| try{ |
| Job job=new Job(in,out); |
| if (!Singleton.__pool.dispatch(job)) |
| job.run(); |
| } |
| catch(Exception e) |
| { |
| LOG.warn(e); |
| } |
| } |
| |
| /* ------------------------------------------------------------------- */ |
| /** Copy Stream in to Stream out until EOF or exception. |
| */ |
| public static void copy(InputStream in, OutputStream out) |
| throws IOException |
| { |
| copy(in,out,-1); |
| } |
| |
| /* ------------------------------------------------------------------- */ |
| /** Copy Stream in to Stream out until EOF or exception |
| * in own thread |
| */ |
| public static void copyThread(Reader in, Writer out) |
| { |
| try |
| { |
| Job job=new Job(in,out); |
| if (!Singleton.__pool.dispatch(job)) |
| job.run(); |
| } |
| catch(Exception e) |
| { |
| LOG.warn(e); |
| } |
| } |
| |
| /* ------------------------------------------------------------------- */ |
| /** Copy Reader to Writer out until EOF or exception. |
| */ |
| public static void copy(Reader in, Writer out) |
| throws IOException |
| { |
| copy(in,out,-1); |
| } |
| |
| /* ------------------------------------------------------------------- */ |
| /** Copy Stream in to Stream for byteCount bytes or until EOF or exception. |
| */ |
| public static void copy(InputStream in, |
| OutputStream out, |
| long byteCount) |
| throws IOException |
| { |
| byte buffer[] = new byte[bufferSize]; |
| int len=bufferSize; |
| |
| if (byteCount>=0) |
| { |
| while (byteCount>0) |
| { |
| int max = byteCount<bufferSize?(int)byteCount:bufferSize; |
| len=in.read(buffer,0,max); |
| |
| if (len==-1) |
| break; |
| |
| byteCount -= len; |
| out.write(buffer,0,len); |
| } |
| } |
| else |
| { |
| while (true) |
| { |
| len=in.read(buffer,0,bufferSize); |
| if (len<0 ) |
| break; |
| out.write(buffer,0,len); |
| } |
| } |
| } |
| |
| /* ------------------------------------------------------------------- */ |
| /** Copy Reader to Writer for byteCount bytes or until EOF or exception. |
| */ |
| public static void copy(Reader in, |
| Writer out, |
| long byteCount) |
| throws IOException |
| { |
| char buffer[] = new char[bufferSize]; |
| int len=bufferSize; |
| |
| if (byteCount>=0) |
| { |
| while (byteCount>0) |
| { |
| if (byteCount<bufferSize) |
| len=in.read(buffer,0,(int)byteCount); |
| else |
| len=in.read(buffer,0,bufferSize); |
| |
| if (len==-1) |
| break; |
| |
| byteCount -= len; |
| out.write(buffer,0,len); |
| } |
| } |
| else if (out instanceof PrintWriter) |
| { |
| PrintWriter pout=(PrintWriter)out; |
| while (!pout.checkError()) |
| { |
| len=in.read(buffer,0,bufferSize); |
| if (len==-1) |
| break; |
| out.write(buffer,0,len); |
| } |
| } |
| else |
| { |
| while (true) |
| { |
| len=in.read(buffer,0,bufferSize); |
| if (len==-1) |
| break; |
| out.write(buffer,0,len); |
| } |
| } |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** Copy files or directories |
| * @param from |
| * @param to |
| * @throws IOException |
| */ |
| public static void copy(File from,File to) throws IOException |
| { |
| if (from.isDirectory()) |
| copyDir(from,to); |
| else |
| copyFile(from,to); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public static void copyDir(File from,File to) throws IOException |
| { |
| if (to.exists()) |
| { |
| if (!to.isDirectory()) |
| throw new IllegalArgumentException(to.toString()); |
| } |
| else |
| to.mkdirs(); |
| |
| File[] files = from.listFiles(); |
| if (files!=null) |
| { |
| for (int i=0;i<files.length;i++) |
| { |
| String name = files[i].getName(); |
| if (".".equals(name) || "..".equals(name)) |
| continue; |
| copy(files[i],new File(to,name)); |
| } |
| } |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public static void copyFile(File from,File to) throws IOException |
| { |
| FileInputStream in=new FileInputStream(from); |
| FileOutputStream out=new FileOutputStream(to); |
| copy(in,out); |
| in.close(); |
| out.close(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** Read input stream to string. |
| */ |
| public static String toString(InputStream in) |
| throws IOException |
| { |
| return toString(in,null); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** Read input stream to string. |
| */ |
| public static String toString(InputStream in,String encoding) |
| throws IOException |
| { |
| StringWriter writer=new StringWriter(); |
| InputStreamReader reader = encoding==null?new InputStreamReader(in):new InputStreamReader(in,encoding); |
| |
| copy(reader,writer); |
| return writer.toString(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** Read input stream to string. |
| */ |
| public static String toString(Reader in) |
| throws IOException |
| { |
| StringWriter writer=new StringWriter(); |
| copy(in,writer); |
| return writer.toString(); |
| } |
| |
| |
| /* ------------------------------------------------------------ */ |
| /** Delete File. |
| * This delete will recursively delete directories - BE CAREFULL |
| * @param file The file to be deleted. |
| */ |
| public static boolean delete(File file) |
| { |
| if (!file.exists()) |
| return false; |
| if (file.isDirectory()) |
| { |
| File[] files = file.listFiles(); |
| for (int i=0;files!=null && i<files.length;i++) |
| delete(files[i]); |
| } |
| return file.delete(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * closes any {@link Closeable} |
| * |
| * @param c the closeable to close |
| */ |
| public static void close(Closeable c) |
| { |
| try |
| { |
| if (c != null) |
| c.close(); |
| } |
| catch (IOException e) |
| { |
| LOG.ignore(e); |
| } |
| } |
| |
| /** |
| * closes an input stream, and logs exceptions |
| * |
| * @param is the input stream to close |
| */ |
| public static void close(InputStream is) |
| { |
| try |
| { |
| if (is != null) |
| is.close(); |
| } |
| catch (IOException e) |
| { |
| LOG.ignore(e); |
| } |
| } |
| |
| /** |
| * closes a reader, and logs exceptions |
| * |
| * @param reader the reader to close |
| */ |
| public static void close(Reader reader) |
| { |
| try |
| { |
| if (reader != null) |
| reader.close(); |
| } catch (IOException e) |
| { |
| LOG.ignore(e); |
| } |
| } |
| |
| /** |
| * closes a writer, and logs exceptions |
| * |
| * @param writer the writer to close |
| */ |
| public static void close(Writer writer) |
| { |
| try |
| { |
| if (writer != null) |
| writer.close(); |
| } catch (IOException e) |
| { |
| LOG.ignore(e); |
| } |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public static byte[] readBytes(InputStream in) |
| throws IOException |
| { |
| ByteArrayOutputStream bout = new ByteArrayOutputStream(); |
| copy(in,bout); |
| return bout.toByteArray(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * closes an output stream, and logs exceptions |
| * |
| * @param os the output stream to close |
| */ |
| public static void close(OutputStream os) |
| { |
| try |
| { |
| if (os != null) |
| os.close(); |
| } |
| catch (IOException e) |
| { |
| LOG.ignore(e); |
| } |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @return An outputstream to nowhere |
| */ |
| public static OutputStream getNullStream() |
| { |
| return __nullStream; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @return An outputstream to nowhere |
| */ |
| public static InputStream getClosedStream() |
| { |
| return __closedStream; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /* ------------------------------------------------------------ */ |
| private static class NullOS extends OutputStream |
| { |
| @Override |
| public void close(){} |
| @Override |
| public void flush(){} |
| @Override |
| public void write(byte[]b){} |
| @Override |
| public void write(byte[]b,int i,int l){} |
| @Override |
| public void write(int b){} |
| } |
| private static NullOS __nullStream = new NullOS(); |
| |
| |
| /* ------------------------------------------------------------ */ |
| /* ------------------------------------------------------------ */ |
| private static class ClosedIS extends InputStream |
| { |
| @Override |
| public int read() throws IOException |
| { |
| return -1; |
| } |
| } |
| private static ClosedIS __closedStream = new ClosedIS(); |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @return An writer to nowhere |
| */ |
| public static Writer getNullWriter() |
| { |
| return __nullWriter; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @return An writer to nowhere |
| */ |
| public static PrintWriter getNullPrintWriter() |
| { |
| return __nullPrintWriter; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /* ------------------------------------------------------------ */ |
| private static class NullWrite extends Writer |
| { |
| @Override |
| public void close(){} |
| @Override |
| public void flush(){} |
| @Override |
| public void write(char[]b){} |
| @Override |
| public void write(char[]b,int o,int l){} |
| @Override |
| public void write(int b){} |
| @Override |
| public void write(String s){} |
| @Override |
| public void write(String s,int o,int l){} |
| } |
| private static NullWrite __nullWriter = new NullWrite(); |
| private static PrintWriter __nullPrintWriter = new PrintWriter(__nullWriter); |
| } |
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