/*
Show context number lines of string before and after target line.
Add HTML formatting to bold the target line.
*/
String showScriptContextHTML(String s, int lineNo, int context) {
StringBuffer sb = new StringBuffer();
BufferedReader br = new BufferedReader(new StringReader(s));
int beginLine = Math.max(1, lineNo - context);
int endLine = lineNo + context;
for (int i = 1; i <= lineNo + context + 1; i++) {
if (i < beginLine) {
try {
br.readLine();
} catch (IOException e) {
throw new RuntimeException(e.toString());
}
continue;
}
if (i > endLine) break;
String line;
try {
line = br.readLine();
} catch (IOException e) {
throw new RuntimeException(e.toString());
}
if (line == null) break;
if (i == lineNo) sb.append("<font color=\"red\">" + i + ": " + line + "</font><br/>");
else sb.append(i + ": " + line + "<br/>");
}
return sb.toString();
}
/** Convert special characters to entities for XML output */
public static String escape(String value) {
String search = "&<>";
String[] replace = {"&", "<", ">"};
StringBuffer buf = new StringBuffer();
for (int i = 0; i < value.length(); i++) {
char c = value.charAt(i);
int pos = search.indexOf(c);
if (pos < 0) buf.append(c);
else buf.append(replace[pos]);
}
return buf.toString();
}
String formatScriptResultHTML(
String script, Object result, Exception error, StringBuffer scriptOutput) throws IOException {
SimpleTemplate tmplt;
if (error != null) {
tmplt = new SimpleTemplate(getClass().getResource("error.template"));
String errString;
if (error instanceof bsh.EvalError) {
int lineNo = ((EvalError) error).getErrorLineNumber();
String msg = error.getMessage();
int contextLines = 4;
errString = escape(msg);
if (lineNo > -1) errString += "<hr>" + showScriptContextHTML(script, lineNo, contextLines);
} else errString = escape(error.toString());
tmplt.replace("error", errString);
} else {
tmplt = new SimpleTemplate(getClass().getResource("result.template"));
tmplt.replace("value", escape(String.valueOf(result)));
tmplt.replace("output", escape(scriptOutput.toString()));
}
return tmplt.toString();
}
void sendRaw(
HttpServletRequest request,
HttpServletResponse response,
Exception scriptError,
Object scriptResult,
StringBuffer scriptOutput)
throws IOException {
response.setContentType("text/plain");
PrintWriter out = response.getWriter();
if (scriptError != null) out.println("Script Error:\n" + scriptError);
else out.println(scriptOutput.toString());
out.flush();
}
private static String getBody(HttpServletRequest req) {
try {
// Try reading the post body using characters.
// This might throw an exception if something on the
// server side already called getInputStream().
// In that case we'll pull as bytes.
Reader reader = null;
try {
reader = new BufferedReader(req.getReader());
} catch (IOException e) {
reader = new BufferedReader(new InputStreamReader(req.getInputStream(), "UTF-8"));
}
StringBuffer sbuf = new StringBuffer();
char[] cbuf = new char[4096];
int count = 0;
while ((count = reader.read(cbuf)) != -1) {
sbuf.append(cbuf, 0, count);
}
return sbuf.toString();
} catch (IOException e2) {
throw new ServerProblemException("IOException in reading POST body: " + e2.getMessage());
}
}
Object evalScript(
String script,
StringBuffer scriptOutput,
boolean captureOutErr,
HttpServletRequest request,
HttpServletResponse response)
throws EvalError {
// Create a PrintStream to capture output
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream pout = new PrintStream(baos);
// Create an interpreter instance with a null inputstream,
// the capture out/err stream, non-interactive
Interpreter bsh = new Interpreter(null, pout, pout, false);
// set up interpreter
bsh.set("bsh.httpServletRequest", request);
bsh.set("bsh.httpServletResponse", response);
// Eval the text, gathering the return value or any error.
Object result = null;
String error = null;
PrintStream sout = System.out;
PrintStream serr = System.err;
if (captureOutErr) {
System.setOut(pout);
System.setErr(pout);
}
try {
// Eval the user text
result = bsh.eval(script);
} finally {
if (captureOutErr) {
System.setOut(sout);
System.setErr(serr);
}
}
pout.flush();
scriptOutput.append(baos.toString());
return result;
}
/**
* String Representation incl. Result
*
* @return Scipt
*/
@Override
public String toString() {
StringBuffer sb = new StringBuffer(m_variable);
sb.append(" { ").append(m_script).append(" } = ").append(getResult(true));
return sb.toString();
} // toString
