samples/bsh/src/dolda/bsvc/ShellPage.java

   1 package dolda.bsvc;
   2
   3 import dolda.jsvc.*;
   4 import dolda.jsvc.util.*;
   5 import java.io.*;
   6 import bsh.Interpreter;
   7
   8 public class ShellPage extends SimpleWriter {
   9     private Console cons = new Console();
  10     private Interpreter ip = new Interpreter(cons);
  11
  12     private static class Console implements bsh.ConsoleInterface {
  13         ByteArrayOutputStream obuf = new ByteArrayOutputStream();
  14         ByteArrayOutputStream ebuf = new ByteArrayOutputStream();
  15         Reader in = new StringReader("");
  16         PrintStream out;
  17         PrintStream err;
  18         {
  19             try {
  20                 out = new PrintStream(obuf, false, "UTF-8");
  21                 err = new PrintStream(ebuf, false, "UTF-8");
  22             } catch(UnsupportedEncodingException e) {
  23                 throw(new Error(e));
  24             }
  25         }
  26
  27         public void error(Object msg) {
  28             getErr().println(msg);
  29         }
  30
  31         public void print(Object o) {
  32             getOut().print(o);
  33         }
  34
  35         public void println(Object o) {
  36             getOut().println(o);
  37         }
  38
  39         public PrintStream getOut() {
  40             return(out);
  41         }
  42
  43         public PrintStream getErr() {
  44             return(err);
  45         }
  46
  47         public Reader getIn() {
  48             return(in);
  49         }
  50
  51         public void reset() {
  52             obuf.reset();
  53             ebuf.reset();
  54         }
  55     }
  56
  57     public void respond(Request req, PrintWriter out) {
  58         MultiMap<String, String> params = req.params();
  59         String cmd = params.get("cmd");
  60
  61         out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
  62         out.println("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">");
  63         out.println("<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en-US\">");
  64         out.println("<head>");
  65         out.println("<title>Shell</title>");
  66         out.println("<link rel=\"stylesheet\" type=\"text/css\" href=\"css\" />");
  67         out.println("</head>");
  68         out.println("<body>");
  69         out.println("<h1>Shell</h1>");
  70         if((req.method() == "POST") && (cmd != null)) {
  71             String eo, ee;
  72             synchronized(cons) {
  73                 cons.reset();
  74                 Object resp;
  75                 try {
  76                     ip.set("req", req);
  77                     resp = ip.eval(cmd);
  78                     out.println("<pre>");
  79                     out.println(Misc.htmlq((resp == null)?"(null)":(resp.toString())));
  80                     out.println("</pre>");
  81                 } catch(bsh.EvalError exc) {
  82                     out.println("<h2>Evaluation error</h2>");
  83                     out.println("<pre>");
  84                     out.print(exc.toString());
  85                     out.println("</pre>");
  86                     if(exc instanceof bsh.TargetError) {
  87                         bsh.TargetError te = (bsh.TargetError)exc;
  88                         out.println("<h3>Target error</h3>");
  89                         out.println("<pre>");
  90                         te.getTarget().printStackTrace(out);
  91                         out.println("</pre>");
  92                     }
  93                 }
  94                 eo = new String(cons.obuf.toByteArray(), Misc.utf8);
  95                 ee = new String(cons.ebuf.toByteArray(), Misc.utf8);
  96             }
  97             if(eo.length() > 0) {
  98                 out.println("<h2>Output</h2>");
  99                 out.println("<pre>");
 100                 out.println(Misc.htmlq(eo));
 101                 out.println("</pre>");
 102             }
 103             if(ee.length() > 0) {
 104                 out.println("<h2>Errors</h2>");
 105                 out.println("<pre>");
 106                 out.println(Misc.htmlq(ee));
 107                 out.println("</pre>");
 108             }
 109         }
 110         out.println("<form action=\"sh\" method=\"post\">");
 111         out.println("<textarea cols=\"80\" rows=\"5\" name=\"cmd\">");
 112         if(cmd != null)
 113             out.print(cmd);
 114         out.println("</textarea>");
 115         out.println("<input type=\"submit\" value=\"Evaluate\" />");
 116         out.println("<input type=\"reset\" value=\"Reset\" />");
 117         out.println("</form>");
 118         out.println("</body>");
 119         out.println("</html>");
 120     }
 121 }