/*
If we want to support multiple commands in the command path we need to
change this to not throw the exception.
*/
private BshMethod loadScriptedCommand(
InputStream in, String name, Class[] argTypes, String resourcePath, Interpreter interpreter)
throws UtilEvalError {
try {
interpreter.eval(new InputStreamReader(in), this, resourcePath);
} catch (EvalError e) {
/*
Here we catch any EvalError from the interpreter because we are
using it as a tool to load the command, not as part of the
execution path.
*/
Interpreter.debug(e.toString());
throw new UtilEvalError("Error loading script: " + e.getMessage(), e);
}
// Look for the loaded command
BshMethod meth = getMethod(name, argTypes);
/*
if ( meth == null )
throw new UtilEvalError("Loaded resource: " + resourcePath +
"had an error or did not contain the correct method" );
*/
return meth;
}
/**
* Execute Script Loads environment and saves result
*
* @return null or Exception
*/
public Exception execute() {
m_result = null;
if (m_variable == null
|| m_variable.length() == 0
|| m_script == null
|| m_script.length() == 0) {
IllegalArgumentException e = new IllegalArgumentException("No variable/script");
log.config(e.toString());
return e;
}
Interpreter i = new Interpreter();
loadEnvironment(i);
try {
log.config(m_script);
i.eval(m_script);
} catch (Exception e) {
log.config(e.toString());
return e;
}
try {
m_result = i.get(m_variable);
log.config("Result (" + m_result.getClass().getName() + ") " + m_result);
} catch (Exception e) {
log.config("Result - " + e);
if (e instanceof NullPointerException)
e = new IllegalArgumentException("Result Variable not found - " + m_variable);
return e;
}
return null;
} // execute
/**
* Runs a BeanShell script. Errors are passed to the caller.
*
* <p>If the <code>in</code> parameter is non-null, the script is read from that stream; otherwise
* it is read from the file identified by <code>path</code> .
*
* <p>The <code>scriptPath</code> BeanShell variable is set to the path name of the script.
*
* @param path The script file's VFS path.
* @param in The reader to read the script from, or <code>null</code> .
* @param namespace The namespace to run the script in.
* @exception Exception instances are thrown when various BeanShell errors occur
* @since jEdit 4.2pre5
*/
public void _runScript(String path, Reader in, NameSpace namespace) throws Exception {
log.info("Running script " + path);
Interpreter interp = createInterpreter(namespace);
try {
if (in == null) {
in = res.getResourceAsReader(path);
}
setupDefaultVariables(namespace);
interp.set("scriptPath", path);
running = true;
interp.eval(in, namespace, path);
} catch (Exception e) {
unwrapException(e);
} finally {
running = false;
try {
// no need to do this for macros!
if (namespace == global) {
resetDefaultVariables(namespace);
interp.unset("scriptPath");
}
} catch (EvalError e) {
// do nothing
}
}
} // }}}
private static void endInterpreter(String contextId) throws EvalError {
Interpreter i = interpreters.get(contextId);
if (i == null) return;
i.eval("clear();"); // can't hurt to tell bsh to clean up internally
interpreters.remove(contextId); // now wait for GC
Log.log("Destroyed context: " + contextId + " (" + i + ")");
}
public String[][] exec(String[] befehle) {
String[][] antworten = new String[befehle.length][1];
Object aktObj;
for (int i = 0; i < befehle.length; i++) {
try {
aktObj = interpreter.eval(befehle[i]);
if (aktObj != null) antworten[i][0] = aktObj.toString();
else antworten[i][0] = "null";
} catch (EvalError e) {
System.err.println(e.getMessage());
antworten[i][0] = "ERROR";
}
if (verbose) {
assert !quiet;
System.out.println("# " + i + ": " + befehle[i]);
for (int j = 0; j < antworten[i].length; j++) {
System.out.println("@ " + antworten[i][j]);
}
} else if (!quiet)
for (int j = 0; j < antworten[i].length; j++) {
System.out.print("#");
}
}
return antworten;
}
private static Expr define(boolean isGlobal, Interpreter interpreter, Scope scope, Expr argExpr) {
if (!(argExpr instanceof ListExpr))
return interpreter.error("def:is: needs more than one argument.");
ListExpr args = (ListExpr) argExpr;
if (args.getList().size() != 2) return interpreter.error("def:is: expects two arguments.");
// get the list of names being defined
Expr nameArg = args.getList().get(0);
List<String> names = new ArrayList<String>();
if (nameArg.getType() == ExprType.NAME) {
// defining a single name
names.add(((NameExpr) nameArg).getName());
} else if (nameArg.getType() == ExprType.LIST) {
// defining a list of names
ListExpr namesList = (ListExpr) nameArg;
for (Expr name : namesList.getList()) {
if (name.getType() != ExprType.NAME) {
return interpreter.error("First argument to def:is: must be a name, list, or call.");
}
names.add(((NameExpr) name).getName());
}
} else {
return interpreter.error("First argument to def:is: must be a name, list, or call.");
}
// evaluate the value(s)
Expr body = args.getList().get(1);
Expr value = interpreter.eval(scope, body);
// make sure the body matches the names
if (names.size() > 1) {
if (value.getType() != ExprType.LIST)
return interpreter.error("When defining multiple names, the value must be a list.");
ListExpr valueList = (ListExpr) value;
if (names.size() != valueList.getList().size())
return interpreter.error(
"When defining multiple names, the number of names and values must match.");
}
// define the names in the correct scope
if (names.size() == 1) {
defineName(isGlobal, interpreter, scope, names.get(0), value);
} else {
ListExpr values = (ListExpr) value;
for (int i = 0; i < names.size(); i++) {
defineName(isGlobal, interpreter, scope, names.get(i), values.getList().get(i));
}
}
return Expr.unit();
}
static String getBshVersion() {
if (bshVersion != null) return bshVersion;
/*
We have included a getVersion() command to detect the version
of bsh. If bsh is packaged in the WAR file it could access it
directly as a bsh command. But if bsh is in the app server's
classpath it won't see it here, so we will source it directly.
This command works around the lack of a coherent version number
in the early versions.
*/
Interpreter bsh = new Interpreter();
try {
bsh.eval(new InputStreamReader(BshServlet.class.getResource("getVersion.bsh").openStream()));
bshVersion = (String) bsh.eval("getVersion()");
} catch (Exception e) {
bshVersion = "BeanShell: unknown version";
}
return bshVersion;
}
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;
}
public String[] exec(String befehl) {
String[] antwort = new String[1];
Object aktObj;
try {
aktObj = interpreter.eval(befehl);
if (aktObj != null) antwort[0] = aktObj.toString();
else antwort[0] = "null";
} catch (EvalError e) {
System.err.println(e.getMessage());
antwort[0] = "ERROR";
}
if (!quiet) System.out.print("#");
if (verbose) {
assert !quiet;
System.out.println(" " + befehl);
System.out.println("@ " + antwort[0]);
}
return antwort;
}
public static void main(String args[]) throws Exception {
Yylex l = null;
parser p;
Interpreter I;
try {
if (args.length == 0) l = new Yylex(System.in);
else l = new Yylex(new FileReader(args[0]));
} catch (FileNotFoundException e) {
System.err.println("Error: File not found: " + args[0]);
System.exit(1);
}
p = new parser(l);
/* The default parser is the first-defined entry point. */
/* You may want to change this. Other options are: */
/* */
try {
calc.Absyn.Exp parse_tree = p.pExp();
I = new Interpreter();
// I.eval(parse_tree) ;
System.out.println(I.eval(parse_tree));
/*System.out.println();
System.out.println("Parse Succesful!");
System.out.println();
System.out.println("[Abstract Syntax]");
System.out.println();
System.out.println(PrettyPrinter.show(parse_tree));
System.out.println();
System.out.println("[Linearized Tree]");
System.out.println();
System.out.println(PrettyPrinter.print(parse_tree));
*/
} catch (Throwable e) {
System.err.println(
"At line " + String.valueOf(l.line_num()) + ", near \"" + l.buff() + "\" :");
System.err.println(" " + e.getMessage());
System.exit(1);
}
}
@Test
public void misc_tests() throws Exception {
Assert.assertEquals(true, TestUtil.eval("return true == true;"));
Assert.assertEquals(true, TestUtil.eval("return false == false;"));
Assert.assertEquals(false, TestUtil.eval("return true == false;"));
Assert.assertEquals(false, TestUtil.eval("return false == true;"));
try {
TestUtil.eval("throw new RuntimeException();");
Assert.fail();
} catch (TargetError e) {
Assert.assertTrue(e.getTarget().getClass() == RuntimeException.class);
}
Assert.assertEquals(
"foobar",
TestUtil.eval(
"String a;",
"try {",
" a = \"foobar\";",
"} catch (Exception e) {",
" throw e;",
"}",
"return a;"));
String script =
"boolean fieldBool = false;\n"
+ "int fieldInt = 0;\n"
+ "Boolean fieldBool2 = false;\n"
+ "void run() {\n"
+ "fieldBool = ! fieldBool;\n"
+ "fieldBool2 = ! fieldBool2;\n"
+ "fieldInt++;\n"
+ "System.out.println(\"fieldBool: \"+fieldBool);\n"
+ "System.out.println(\"fieldBool2: \"+fieldBool2);\n"
+ "System.out.println(\"fieldInt: \"+fieldInt);\n"
+ "}\n";
Interpreter bsh = new Interpreter();
bsh.eval(script);
Runnable runnable = (Runnable) bsh.getInterface(Runnable.class);
runnable.run();
}
/**
* Evaluates the specified BeanShell expression. Unlike <code>eval()</code> , this method passes
* any exceptions to the caller.
*
* @param namespace The namespace
* @param command The expression
* @return Description of the Return Value
* @exception Exception instances are thrown when various BeanShell errors occur
* @since jEdit 3.2pre7
*/
public Object _eval(NameSpace namespace, String command) throws Exception {
Interpreter interp = createInterpreter(namespace);
try {
setupDefaultVariables(namespace);
if (log.isDebugEnabled()) {
log.debug("Running script: " + command);
}
return interp.eval(command);
} catch (Exception e) {
unwrapException(e);
// never called
return null;
} finally {
// try {
resetDefaultVariables(namespace);
// }
// catch (UtilEvalError e) {
// do nothing
// }
}
} // }}}
private static Interpreter getInterpreter(String contextId) throws EvalError {
// Get the appropriate interpreter
Interpreter i = null;
boolean createdInterp = false;
synchronized (interpreters) { // serialize two gets of the same name
i = interpreters.get(contextId);
if (i == null) {
i = new Interpreter();
interpreters.put(contextId, i);
createdInterp = true;
}
}
if (createdInterp) {
Log.log("Created context: " + contextId + " (" + i + ")");
// Now configure stdin and stdout to capture 10k of content
// Store references to the circular buffers within the interpreter itself.
// This provides a nice place to store them plus theoretically allows
// advanced use from within the bsh environment.
// On Windows print() outputs \r\n but in XQuery that's normalized to \n
// so the 10k of Java buffer may produce less than 10k of content in XQuery!
OutputStream circularOutput = new CircularByteArrayOutputStream(10240);
PrintStream printOutput = new PrintStream(circularOutput);
i.setOut(printOutput);
i.set("mljamout", circularOutput);
OutputStream circularError = new CircularByteArrayOutputStream(10240);
PrintStream printError = new PrintStream(circularError);
i.setErr(printError);
i.set("mljamerr", circularError);
// Capture the built-in System.out and System.err also.
// (Commented out since System appears global, can't do per interpreter.)
// i.set("mljamprintout", printOutput);
// i.set("mljamprinterr", printError);
// i.eval("System.setOut(mljamprintout);");
// i.eval("System.setErr(mljamprinterr);");
// Need to expose hexdecode() and base64decode() built-in functions
i.eval("hexdecode(String s) { return com.xqdev.jam.MLJAM.hexDecode(s); }");
i.eval("base64decode(String s) { return com.xqdev.jam.MLJAM.base64Decode(s); }");
// Let's tell the context what its id is
i.set("mljamid", contextId);
}
// Update the last accessed time, used for cleaning
i.set("mljamlast", System.currentTimeMillis());
// If it's been long enough, go snooping for stale contexts
if (System.currentTimeMillis() > lastClean + CLEAN_INTERVAL) {
Log.log("Initiated periodic scan for stale context objects");
lastClean = System.currentTimeMillis();
Iterator<Interpreter> itr = interpreters.values().iterator();
while (itr.hasNext()) {
Interpreter interp = itr.next();
Long last = (Long) interp.get("mljamlast");
if (System.currentTimeMillis() > last + STALE_TIMEOUT) {
itr.remove();
Log.log("Staled context: " + interp.get("mljamid") + " (" + interp + ")");
} else if ((System.currentTimeMillis() > last + TEMP_STALE_TIMEOUT)
&& ("" + interp.get("mljamid")).startsWith("temp:")) {
itr.remove();
Log.log("Staled temp context: " + interp.get("mljamid") + " (" + interp + ")");
}
}
}
return i;
}
protected void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
try {
// A good request looks like /mljam/contextid/verb?name=varname
// The extra path info includes the context id and verb
String extra = req.getPathInfo(); // "/contextid/verb"
if (extra == null || extra.equals("")) {
throw new ClientProblemException(
"Request requires a context id and verb in its extra path info");
}
String[] parts = extra.split("/"); // { "", "contextid", "verb" }
if (parts.length < 2) {
throw new ClientProblemException(
"Request requires a context id and verb in its extra path info");
} else if (parts.length < 3) {
throw new ClientProblemException("Request requires a verb in its extra path info");
}
String contextId = parts[1];
String verb = parts[2];
String method = req.getMethod();
if (method.equalsIgnoreCase("get")) {
// We have three GET verbs: get, get-stdout, get-stderr.
// These are all idempotent, while the POST verbs aren't. The get
// verb accept a "name" query string parameter. The get verb returns
// either XQuery to evaluate (indicated by x-marklogic/xquery content type)
// or a raw binary (indicated by an application/binary-encoded content type).
if (verb.equalsIgnoreCase("get")) {
String name = req.getParameter("name");
if (name == null || name.equals("")) {
throw new ClientProblemException("The get verb requires a name parameter");
}
Interpreter i = getInterpreter(contextId);
Object o = i.get(name);
if (o instanceof byte[]) {
sendBinaryResponse(res, (byte[]) o);
} else if (o instanceof String) {
sendStringResponse(res, (String) o);
} else {
sendXQueryResponse(res, o);
}
} else if (verb.equalsIgnoreCase("get-stdout")) {
Interpreter i = getInterpreter(contextId);
i.getOut().flush();
CircularByteArrayOutputStream circ = (CircularByteArrayOutputStream) i.get("mljamout");
if (circ != null) {
sendStringResponse(res, circ.toString());
circ.reset();
} else {
throw new ServerProblemException("Could not fetch mljamout from interpreter context");
}
} else if (verb.equalsIgnoreCase("get-stderr")) {
Interpreter i = getInterpreter(contextId);
i.getErr().flush();
CircularByteArrayOutputStream circ = (CircularByteArrayOutputStream) i.get("mljamerr");
if (circ != null) {
sendStringResponse(res, circ.toString());
circ.reset();
} else {
throw new ServerProblemException("Could not fetch mljamerr from interpreter context");
}
} else {
throw new ClientProblemException("Unrecognized GET verb: " + verb);
}
} else if (method.equalsIgnoreCase("post")) {
// We have six POST verbs: eval, unset, end, source, set-string, and set-binary.
// These are POST verbs because they aren't idempotent.
// The set-string, set-binary, unset, and source verbs accept a "name"
// query string parameter. The set-string and set-binary verbs accept
// a value in their post body. The eval verb accepts code in its post body.
if (verb.equalsIgnoreCase("set-string")) {
String name = req.getParameter("name");
if (name == null || name.equals("")) {
throw new ClientProblemException("The set-string verb requires a name parameter");
}
String body = getBody(req); // a value of "" is legit
Interpreter i = getInterpreter(contextId);
i.unset(name);
i.set(name, body);
sendNoResponse(res);
} else if (verb.equalsIgnoreCase("set-binary")) {
String name = req.getParameter("name");
if (name == null || name.equals("")) {
throw new ClientProblemException("The set-binary verb requires a name parameter");
}
String body = getBody(req); // a value of "" is legit
byte[] bodyBytes = hexDecode(body); // later could do this streaming for speed
Interpreter i = getInterpreter(contextId);
i.unset(name);
i.set(name, bodyBytes);
sendNoResponse(res);
} else if (verb.equalsIgnoreCase("eval")) {
String body = getBody(req);
if (body == null || body.equals("")) {
throw new ClientProblemException(
"The eval verb requires a post body containing code to eval");
}
Interpreter i = getInterpreter(contextId);
i.eval(body);
sendNoResponse(res);
} else if (verb.equalsIgnoreCase("eval-get")) {
String body = getBody(req);
if (body == null || body.equals("")) {
throw new ClientProblemException(
"The eval-get verb requires a post body containing code to eval");
}
Interpreter i = getInterpreter(contextId);
Object o = i.eval(body);
if (o instanceof byte[]) {
sendBinaryResponse(res, (byte[]) o);
} else if (o instanceof String) {
sendStringResponse(res, (String) o);
} else {
sendXQueryResponse(res, o);
}
} else if (verb.equalsIgnoreCase("unset")) {
String name = req.getParameter("name");
if (name == null || name.equals("")) {
throw new ClientProblemException("The unset verb requires a name parameter");
}
Interpreter i = getInterpreter(contextId);
i.unset(name);
sendNoResponse(res);
} else if (verb.equalsIgnoreCase("end")) {
endInterpreter(contextId);
sendNoResponse(res);
} else if (verb.equalsIgnoreCase("source")) {
String name = req.getParameter("name");
if (name == null || name.equals("")) {
throw new ClientProblemException("The source verb requires a name parameter");
}
Interpreter i = getInterpreter(contextId);
i.source(name);
sendNoResponse(res);
} else {
throw new ClientProblemException("Unrecognized POST verb: " + verb);
}
}
} catch (TargetError e) {
Throwable target = e.getTarget();
Log.log(e);
Log.log("Target: " + target);
sendServerProblemResponse(
res,
target.getClass().getName()
+ ": "
+ target.getMessage()
+ " when executing Java code: "
+ e.getErrorText()); // include full trace?
} catch (EvalError e) {
Log.log(e);
sendServerProblemResponse(
res, e.getClass().getName() + ": " + e.getMessage()); // include full trace?
} catch (ClientProblemException e) {
Log.log(e);
sendClientProblemResponse(res, e.getMessage());
} catch (ServerProblemException e) {
Log.log(e);
sendServerProblemResponse(res, e.getMessage());
}
}
