Mercurial Hosting > luan
view core/src/luan/modules/IoLuan.java @ 221:ec016471c6eb
make LuanTable an interface
git-svn-id: https://luan-java.googlecode.com/svn/trunk@222 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
---|---|
date | Thu, 17 Jul 2014 07:49:26 +0000 |
parents | 61afe2a1ce96 |
children | 97d175772fed |
line wrap: on
line source
package luan.modules; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintStream; import java.io.Reader; import java.io.Writer; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.ByteArrayInputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.net.URL; import java.net.Socket; import java.net.ServerSocket; import java.net.MalformedURLException; import java.util.List; import java.util.ArrayList; import luan.Luan; import luan.LuanState; import luan.LuanTable; import luan.LuanFunction; import luan.LuanJavaFunction; import luan.LuanException; public final class IoLuan { public static final LuanFunction LOADER = new LuanFunction() { @Override public Object call(LuanState luan,Object[] args) { LuanTable module = Luan.newTable(); try { add( module, "File", LuanState.class, String.class ); add( module, "read_console_line", String.class ); LuanTable stdin = Luan.newTable(); stdin.put( "read_text", new LuanJavaFunction( IoLuan.class.getMethod( "stdin_read_text" ), null ) ); stdin.put( "read_binary", new LuanJavaFunction( IoLuan.class.getMethod( "stdin_read_binary" ), null ) ); stdin.put( "read_lines", new LuanJavaFunction( IoLuan.class.getMethod( "stdin_read_lines" ), null ) ); stdin.put( "read_blocks", new LuanJavaFunction( IoLuan.class.getMethod( "stdin_read_blocks", Integer.class ), null ) ); module.put( "stdin", stdin ); add( module, "Socket", String.class, Integer.TYPE ); add( module, "socket_server", Integer.TYPE ); } catch(NoSuchMethodException e) { throw new RuntimeException(e); } module.put( "stdout", textWriter(System.out) ); module.put( "stderr", textWriter(System.err) ); return module; } }; private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException { t.put( method, new LuanJavaFunction(IoLuan.class.getMethod(method,parameterTypes),null) ); } public static String stdin_read_text() throws IOException { return Utils.readAll(new InputStreamReader(System.in)); } public static byte[] stdin_read_binary() throws IOException { return Utils.readAll(System.in); } public static LuanFunction stdin_read_lines() throws IOException { return lines(new BufferedReader(new InputStreamReader(System.in))); } public static LuanFunction stdin_read_blocks(Integer blockSize) throws IOException { int n = blockSize!=null ? blockSize : Utils.bufSize; return blocks(System.in,n); } public static String read_console_line(String prompt) throws IOException { if( prompt==null ) prompt = "> "; return System.console().readLine(prompt); } public interface LuanWriter { public void write(LuanState luan,Object... args) throws LuanException, IOException; public void close() throws IOException; } public static LuanTable textWriter(final PrintStream out) { LuanWriter luanWriter = new LuanWriter() { public void write(LuanState luan,Object... args) throws LuanException { for( Object obj : args ) { out.print( luan.toString(obj) ); } } public void close() { out.close(); } }; return writer(luanWriter); } public static LuanTable textWriter(final Writer out) { LuanWriter luanWriter = new LuanWriter() { public void write(LuanState luan,Object... args) throws LuanException, IOException { for( Object obj : args ) { out.write( luan.toString(obj) ); } } public void close() throws IOException { out.close(); } }; return writer(luanWriter); } private static LuanTable writer(LuanWriter luanWriter) { LuanTable writer = Luan.newTable(); try { writer.put( "write", new LuanJavaFunction( LuanWriter.class.getMethod( "write", LuanState.class, new Object[0].getClass() ), luanWriter ) ); writer.put( "close", new LuanJavaFunction( LuanWriter.class.getMethod( "close" ), luanWriter ) ); } catch(NoSuchMethodException e) { throw new RuntimeException(e); } return writer; } public static LuanTable binaryWriter(final OutputStream out) { LuanTable writer = Luan.newTable(); try { writer.put( "write", new LuanJavaFunction( OutputStream.class.getMethod( "write", new byte[0].getClass() ), out ) ); writer.put( "close", new LuanJavaFunction( OutputStream.class.getMethod( "close" ), out ) ); } catch(NoSuchMethodException e) { throw new RuntimeException(e); } return writer; } static LuanFunction lines(final BufferedReader in) { return new LuanFunction() { @Override public Object call(LuanState luan,Object[] args) throws LuanException { try { if( args.length > 0 ) { if( args.length > 1 || !"close".equals(args[0]) ) throw luan.exception( "the only argument allowed is 'close'" ); in.close(); return null; } String rtn = in.readLine(); if( rtn==null ) in.close(); return rtn; } catch(IOException e) { throw luan.exception(e); } } }; } static LuanFunction blocks(final InputStream in,final int blockSize) { return new LuanFunction() { final byte[] a = new byte[blockSize]; @Override public Object call(LuanState luan,Object[] args) throws LuanException { try { if( args.length > 0 ) { if( args.length > 1 || !"close".equals(args[0]) ) throw luan.exception( "the only argument allowed is 'close'" ); in.close(); return null; } if( in.read(a) == -1 ) { in.close(); return null; } return a; } catch(IOException e) { throw luan.exception(e); } } }; } public static abstract class LuanIn { abstract InputStream inputStream() throws IOException; public abstract String to_string(); public String read_text() throws IOException { Reader in = new InputStreamReader(inputStream()); String s = Utils.readAll(in); in.close(); return s; } public byte[] read_binary() throws IOException { InputStream in = inputStream(); byte[] a = Utils.readAll(in); in.close(); return a; } public LuanFunction read_lines() throws IOException { return lines(new BufferedReader(new InputStreamReader(inputStream()))); } public LuanFunction read_blocks(Integer blockSize) throws IOException { int n = blockSize!=null ? blockSize : Utils.bufSize; return blocks(inputStream(),n); } LuanTable table() { LuanTable tbl = Luan.newTable(); try { tbl.put( "to_string", new LuanJavaFunction( LuanIn.class.getMethod( "to_string" ), this ) ); tbl.put( "read_text", new LuanJavaFunction( LuanIn.class.getMethod( "read_text" ), this ) ); tbl.put( "read_binary", new LuanJavaFunction( LuanIn.class.getMethod( "read_binary" ), this ) ); tbl.put( "read_lines", new LuanJavaFunction( LuanIn.class.getMethod( "read_lines" ), this ) ); tbl.put( "read_blocks", new LuanJavaFunction( LuanIn.class.getMethod( "read_blocks", Integer.class ), this ) ); } catch(NoSuchMethodException e) { throw new RuntimeException(e); } return tbl; } } public static abstract class LuanIO extends LuanIn { abstract OutputStream outputStream() throws IOException; public void write(LuanState luan,Object obj) throws LuanException, IOException { if( obj instanceof String ) { String s = (String)obj; Writer out = new OutputStreamWriter(outputStream()); out.write(s); out.close(); return; } if( obj instanceof byte[] ) { byte[] a = (byte[])obj; OutputStream out = outputStream(); Utils.copyAll(new ByteArrayInputStream(a),out); out.close(); return; } throw luan.exception( "bad argument #1 to 'write' (string or binary expected)" ); } public LuanTable text_writer() throws IOException { return textWriter(new BufferedWriter(new OutputStreamWriter(outputStream()))); } public LuanTable binary_writer() throws IOException { return binaryWriter(new BufferedOutputStream(outputStream())); } @Override LuanTable table() { LuanTable tbl = super.table(); try { tbl.put( "write", new LuanJavaFunction( LuanIO.class.getMethod( "write", LuanState.class, Object.class ), this ) ); tbl.put( "text_writer", new LuanJavaFunction( LuanIO.class.getMethod( "text_writer" ), this ) ); tbl.put( "binary_writer", new LuanJavaFunction( LuanIO.class.getMethod( "binary_writer" ), this ) ); } catch(NoSuchMethodException e) { throw new RuntimeException(e); } return tbl; } } public static final class LuanUrl extends LuanIn { private final URL url; private LuanUrl(URL url) throws LuanException { this.url = url; } @Override InputStream inputStream() throws IOException { return url.openStream(); } @Override public String to_string() { return url.toString(); } } public static final class LuanFile extends LuanIO { private final File file; private LuanFile(LuanState luan,File file) throws LuanException { this(file); check(luan,file.toString()); } private LuanFile(File file) { this.file = file; } @Override InputStream inputStream() throws IOException { return new FileInputStream(file); } @Override OutputStream outputStream() throws IOException { return new FileOutputStream(file); } @Override public String to_string() { return file.toString(); } public LuanTable child(LuanState luan,String name) throws LuanException { return new LuanFile(luan,new File(file,name)).table(); } public LuanTable children(LuanState luan) throws LuanException { File[] files = file.listFiles(); if( files==null ) return null; LuanTable list = Luan.newTable(); for( File f : files ) { list.add(new LuanFile(luan,f).table()); } return list; } public boolean exists() { return Utils.exists(file); } @Override LuanTable table() { LuanTable tbl = super.table(); try { tbl.put( "name", new LuanJavaFunction( File.class.getMethod( "getName" ), file ) ); tbl.put( "exists", new LuanJavaFunction( LuanFile.class.getMethod( "exists" ), this ) ); tbl.put( "is_directory", new LuanJavaFunction( File.class.getMethod( "isDirectory" ), file ) ); tbl.put( "is_file", new LuanJavaFunction( File.class.getMethod( "isFile" ), file ) ); tbl.put( "delete", new LuanJavaFunction( File.class.getMethod( "delete" ), file ) ); tbl.put( "mkdir", new LuanJavaFunction( File.class.getMethod( "mkdir" ), file ) ); tbl.put( "mkdirs", new LuanJavaFunction( File.class.getMethod( "mkdirs" ), file ) ); tbl.put( "last_modified", new LuanJavaFunction( File.class.getMethod( "lastModified" ), file ) ); tbl.put( "child", new LuanJavaFunction( LuanFile.class.getMethod( "child", LuanState.class, String.class ), this ) ); tbl.put( "children", new LuanJavaFunction( LuanFile.class.getMethod( "children", LuanState.class ), this ) ); } catch(NoSuchMethodException e) { throw new RuntimeException(e); } return tbl; } } public static LuanIn luanIo(LuanState luan,String name) throws LuanException { check(luan,name); File file = Utils.toFile(name); if( file != null ) return new LuanFile(file); URL url = Utils.toUrl(name); if( url != null ) { return new LuanUrl(url); } throw luan.exception( "file '"+name+"' not found" ); } public static LuanTable File(LuanState luan,String name) throws LuanException { return luanIo(luan,name).table(); } public static final class LuanSocket extends LuanIO { private final Socket socket; private LuanSocket(String host,int port) throws IOException { this(new Socket(host,port)); } private LuanSocket(Socket socket) throws IOException { this.socket = socket; } @Override InputStream inputStream() throws IOException { return socket.getInputStream(); } @Override OutputStream outputStream() throws IOException { return socket.getOutputStream(); } @Override public String to_string() { return socket.toString(); } public LuanTable Pickle_client(LuanState luan) throws IOException { DataInputStream in = new DataInputStream(new BufferedInputStream(inputStream())); DataOutputStream out = new DataOutputStream(new BufferedOutputStream(outputStream())); return new PickleClient(luan,in,out).table(); } public void run_pickle_server(LuanState luan) throws IOException { DataInputStream in = new DataInputStream(new BufferedInputStream(inputStream())); DataOutputStream out = new DataOutputStream(new BufferedOutputStream(outputStream())); new PickleServer(luan,in,out).run(); } @Override LuanTable table() { LuanTable tbl = super.table(); try { tbl.put( "Pickle_client", new LuanJavaFunction( LuanSocket.class.getMethod( "Pickle_client", LuanState.class ), this ) ); tbl.put( "run_pickle_server", new LuanJavaFunction( LuanSocket.class.getMethod( "run_pickle_server", LuanState.class ), this ) ); } catch(NoSuchMethodException e) { throw new RuntimeException(e); } return tbl; } } public static LuanTable Socket(String host,int port) throws IOException { return new LuanSocket(host,port).table(); } public static LuanFunction socket_server(int port) throws IOException { final ServerSocket ss = new ServerSocket(port); return new LuanFunction() { @Override public Object call(LuanState luan,Object[] args) throws LuanException { try { if( args.length > 0 ) { if( args.length > 1 || !"close".equals(args[0]) ) throw luan.exception( "the only argument allowed is 'close'" ); ss.close(); return null; } return new LuanSocket(ss.accept()).table(); } catch(IOException e) { throw luan.exception(e); } } }; } // security public interface Security { public void check(LuanState luan,String name) throws LuanException; } private static String SECURITY_KEY = "Io.Security"; private static void check(LuanState luan,String name) throws LuanException { Security s = (Security)luan.registry().get(SECURITY_KEY); if( s!=null ) s.check(luan,name); } public static void setSecurity(LuanState luan,Security s) { luan.registry().put(SECURITY_KEY,s); } public static class DirSecurity implements Security { private final String[] dirs; public DirSecurity(LuanState luan,String[] dirs) { this.dirs = dirs; } @Override public void check(LuanState luan,String name) throws LuanException { if( name.contains("..") ) throw luan.exception("Security violation - '"+name+"' contains '..'"); for( String dir : dirs ) { if( name.startsWith(dir) ) return; } throw luan.exception("Security violation - '"+name+"' not in allowed directory"); } } private void IoLuan() {} // never }