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comparison src/luan/tools/WebShell.java @ 49:8ede219cd111

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add WebShell git-svn-id: https://luan-java.googlecode.com/svn/trunk@50 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 28 Dec 2012 19:35:04 +0000
parents
children 272b6f1d7dac
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48:64ecb7a3aad7 49:8ede219cd111
1 package luan.tools;
2
3 import java.io.IOException;
4 import java.io.PrintStream;
5 import java.io.Writer;
6 import java.io.PrintWriter;
7 import java.io.ByteArrayOutputStream;
8 import java.io.OutputStreamWriter;
9 import javax.servlet.ServletException;
10 import javax.servlet.http.HttpServlet;
11 import javax.servlet.http.HttpServletRequest;
12 import javax.servlet.http.HttpServletResponse;
13 import javax.servlet.http.HttpSession;
14 import org.slf4j.Logger;
15 import org.slf4j.LoggerFactory;
16 import luan.LuanFunction;
17 import luan.LuanState;
18 import luan.LuanException;
19 import luan.interp.LuanCompiler;
20 import luan.lib.BasicLib;
21 import luan.lib.JavaLib;
22 import luan.lib.StringLib;
23 import luan.lib.TableLib;
24 import luan.lib.HtmlLib;
25
26
27 public class WebShell extends HttpServlet {
28 private static final Logger logger = LoggerFactory.getLogger(WebShell.class);
29
30 protected LuanState newLuanState() {
31 LuanState luan = LuanCompiler.newLuanState();
32 BasicLib.register(luan);
33 JavaLib.register(luan);
34 StringLib.register(luan);
35 TableLib.register(luan);
36 HtmlLib.register(luan);
37 return luan;
38 }
39
40 protected Object[] eval(LuanState luan,String cmd) throws LuanException {
41 LuanFunction fn = BasicLib.load(luan,cmd,"WebShell");
42 return luan.call(fn,null,null);
43 }
44
45 protected void service(HttpServletRequest request,HttpServletResponse response)
46 throws ServletException, IOException
47 {
48 PrintWriter out = response.getWriter();
49 HttpSession session = request.getSession();
50
51 ByteArrayOutputStream history = (ByteArrayOutputStream)session.getValue("history");
52 if( history==null ) {
53 history = new ByteArrayOutputStream();
54 session.putValue("history",history);
55 }
56
57 if( request.getParameter("clear") != null ) {
58 history.reset();
59 } else {
60 String cmd = request.getParameter("cmd");
61 if( cmd != null ) {
62 Writer writer = new OutputStreamWriter(history);
63 writer.write( "% " + HtmlLib.encode(cmd) + "\r\n" );
64 try {
65 LuanState luan = (LuanState)session.getValue("luan");
66 if( luan==null ) {
67 luan = newLuanState();
68 session.putValue("luan",luan);
69 }
70 luan.out = new PrintStream(history);
71 luan.global().put("request",request);
72 luan.global().put("response",response);
73 Object[] result = eval(luan,cmd);
74 if( result.length > 0 ) {
75 for( int i=0; i<result.length; i++ ) {
76 if( i > 0 )
77 writer.write(" ");
78 writer.write(HtmlLib.encode(luan.toString(null,result[i])));
79 }
80 writer.write("\r\n");
81 }
82 } catch(LuanException e) {
83 logger.info("",e);
84 writer.write( HtmlLib.encode(e.toString()) );
85 }
86 writer.flush();
87 }
88 }
89
90 out.println( "<html>" );
91 out.println( "<title>Luan Shell</title>" );
92 out.println( "<body>" );
93 out.println( "<p>This is a command shell. Enter commands below." );
94 out.println( "<pre>" + history + "</pre>" );
95 out.println( "<form name='theForm' method='post'>" );
96 out.println( "% <input name='cmd' size=60>" );
97 out.println( "<input type=submit value=run>" );
98 out.println( "<input type=submit name=clear value=clear>" );
99 out.println( "</form>" );
100
101 out.println( "<script>document.theForm.cmd.focus();</script>" );
102
103 out.println( "<p>" );
104 out.println( "</body>" );
105 out.println( "</html>" );
106 }
107 }