RE: Scope and Multithreading

Yes, there should not be a problem with this, as a scope is essentially just a container. Multiple scripts can be executed under one scope simultaneously as well. All presuming, as you stated, that the objects are immutable or you have made them thread safe yourself (Rhino does not make any effort to make the access to your objects thread safe, that will be your job). David -----Original Message----- From: dev-tech-js-engine-rhino-bounces+davidparks21=yahoo.com@lists.mozilla.org [mailto:dev-tech-js-engine-rhino-bounces+davidparks21=yahoo.com@lists.mozilla.org] On Behalf Of

Add instrumentation to standard objects

Hi there, I would like to add some instrumentation to some standard objects like native string and array to monitor some events like string concatenation, array insertion? what is the best way to do it without patching Rhino? does the following code solve the problem? -------------------------------------------------- ScriptableObject.defineClass(scope, MyPkg.String.class); ScriptableObject.defineClass(scope, MyPkg.Array.class); -------------------------------------------------- Thanks. Arthur

E4X filter scope

This is a cryptographically signed message in MIME format. --------------ms070807080206010003020402 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable It's my understanding from ECMA-375, 2nd edition, section 11.2.4, that=20 given xml =3D <xml><e id=3D"1"/><e id=3D"2"/></xml>; the following code xml.*.(@id =3D=3D "1") (which returns the <e id=3D"1"/> element) could also be written as xml.*.(attribute("id") =3D=3D "1") I.e., not only the node's properties but also its methods should be=20 available to the filters

How to instantiate java inner class from rhino?

Hello, while working with rhino i have to make use of some given java objects. Unfortunatly these objects have a quite strange design and so i ran into the following problem: How to instantiate a java inner class from within rhino scripting? In pure Java it is OuterClass.InnerClass innerObject = outerObject.new InnerClass(); but when i try something similar with rhino it fails importClass(org.some.Class); importClass(org.some.Class.Inner); var class = new Class(); var inner = class.new Inner(); I was searching the docs but couldnt figure if it is possible at all? Tha

how to load js libraries in an embedded rhino application?

Hello, How does one load a library such as jQuery or prototype into the rhino context when running as an embedded app within a java program? I am using Java 6, rhino 1.7R2. I can totally run functions and eval arbitrary code, but I cant find any documentation or even class files in the source tree that scream to me "use me to load libraries". So what class/method in Rhino actually satisfies the load (file) semantics in the command line? Thanks for your attention! Sachin

Rhino Thread Safety

Hello, I am new to Rhino, and I want to make sure I understand how it works in mul= tithreaded environment. In particular, I have a java class that wraps a Jav= aScript expression, and I hope it is thread safe. I would really appreciate= if someone with more experience can confirm it is thread safe, or point to= things to change in order to make it thread safe. I am using Rhino version that comes with Weblogic 10.0.1 (I think I read so= mewhere it is a modified 1.6R4). Please note the following constraints which should help with thread safety: - objects put into share

run strophe on rhino ontop of GAE

have anyone success in running strophe on rhino ontop of GAE and use strophe to connect to external BOSH? Will that be possible?

Looking elsewhere for Messages.properties

Hi, all. Wondering if I might get a better response here than I have in the various Android forums I've poked, especially since I'd rather create a fix that works for everyone than fork Rhino just so it works for me. As has been implied, I'm using Rhino to script an Android app. I had various issues with this under 1.6 which I fixed, but the one that keeps coming back to bite me is Messages.properties' location. Specifically, ScriptRuntime hard-codes this to a class, then stores Messages*.properties in the jar. This seems like a good solution until Android steps in and re-i

Java hosted module script provider for CommonJS

Hi, I am opening a new thread related to CommonJS. I just have created and uploaded new patch, https://bugzilla.mozilla.org/show_bug.cgi?id=547071. In contains initial implementation of Java hosted module script provider. It is really basic implementation based on one of my previous posts. If you like this idea let me know and I will spend more time on making this implementation more clean and expendable. Let me know your thoughts and ideas. Regards, Jarek

JavaAdapter on Android

Hi all, I am experimenting with Rhino on Android (interpreted mode), and I have run into a show-stopper. When using the JavaAdapter constructor to extend a Java class, it seems from the stack trace, that Rhino generates byte codes, which then can not be loaded on Dalvik (the Android VM). Any workaround for this? The ideal solution is to generate Dalvik byte code, but this is a too complex undertaking for me right now. One fix is to write wrapper classes in Java that delegate to JavaScript objects, but this is a rather clumsy and non-general solution, and time consuming to imple

__proto__ not working?

I seem to be in a pickle on this one (from the Rhino shell): js> function A() { > } A.prototype = { foo: "Quack", }; [object Object] js> function B() {} B.prototype = { __prototype__: A.prototype, bar: "Foo", }; [object Object] js> foo = new B(); [object Object] js> print (foo.bar); Foo js> print(foo.foo); undefined js> foo.__prototype__; [object Object] js> foo instanceof A; false Not quite sure what's going on here as this works in the Mozilla JS engine (i.e. the browser). Can someone suggest a better way to perform a.) inheritance and b.) making sure that things suc

Rhino Security Policy File

I am kind of new to rhino. I am using a rhino based scripting framework in a servlet environment. I would like to run untrusted javascript code and so would like to restrict the code with a security manager. Does anyone have a basic security policy file to start with, or a list of permissions rhino needs. Or maybe a suggestion about how to go about accomplishing this? Thanks for any advice. Tony

NullPointerException in Function.call method

Hi, I have a problem where I sometimes get a NullPointerException when calling the call-method of the Function-class in rhino. The case is that we are running a J2EE-application inside JBOSS application-server, a couple of Scripts are compiled using Context.compileReader and then cached in memory, script-functions are then called using the Function.call-method. This normally works fine but sometimes the Function.call gives a NullPointerException without further info. When this happens the Script stops working, always returning NullPointerException when Functions are called unti

Envjs html parser silently fails to load without -opt -1

We had this problem before but because the entire project was nearly 63KB in a single closure I felt like it was related to the 64KB limit for single functions. We recently did a big refactor so the dom, events, html, parser, timer, xhr, and window are each seperated and have clearer dependencies on each other. Unfortunately, loading the parser at any point (which is about 32KB) still causes a silent failure that goes away with -opt -1. I realize I can set the optimization level internally to hide this requirement from the end user but I'm still a little perplexed why it wont comp

Line numbers in errors don't get populated

Hi there, I have some confusing behaviour where Rhino isn't producing line numbers in errors when a type error is generated (e.g. trying to call a method on an object that doesn't exist). When running a simple standalong helloworld app that runs a script I see the line numbers in the errors in both interpreted and compiled mode. And in interpreted mode I also see the JS function names in stack traces. e.g. the error might be like: TypeError: Cannot find function xyz in object MyObj. (script#21) and the relevant part of the stack: at org.mozilla.javascript.ScriptRunt

ClassCache Map Thread Safety?

We are trying to resolve an issue where the Rhino engine occasionally gets stuck early in the run. =20 We use a shared sealed global scope, and create scripts that execute in multiple threads, inheriting the core objects from the single shared global scope. =20 =20 Under load, it looks like the HashMap instances in org.mozilla.javascript.ClassCache get corrupted. We get a code thread hung in this code below, and all the other threads waiting for this guy to give up a synchronization lock. =20 We are trying the use of ConcurrentHashMap instead of HashMap inside the Cla

Input validation in Rhino ?

Hi all , Does rhino does any type of input validation or provide some interface or other way so that we can validate input ( like read from some xml file) ? In case such service exists in rhino, please provide information regarding that. I would be very thankful to you. Thanks, Rajat

CommonJS Modules in Rhino

Folks, I'm contemplating adding CommonJS Modules implementation to Rhino = codebase proper. I'd create org.mozilla.javascript.commonjs package to = hold it, and we could have a method similar to initStandardObjects(), = i.e. initCommonJs() that'd initialize it - basically install a require() = function with the expected semantics in the top-level scope. I want = leave some of its aspects - most notably lookup of the module script - = pluggable, defined by interfaces in the org.mozilla.javascript.commonjs = package, so that specific embeddings of Rhino (JS app servers) can = install

sync and spawn

hi, i do this test. from the result, it seems use one thread to sync two function. but why the result have one undefined msg... must use spawn by many thread? if use many thread , how can i know if error in one thread... thanks. test example: var obj = { thread1 : sync(f)}; function f(a, b) { java.lang.Thread.sleep(2000); print(a + ";" + b); var threadName = java.lang.Thread.currentThread().getName(); var threadID = java.lang.Thread.currentThread().getId() print(threadID + "-" + threadName); } obj.thread1(f(1, 2)); ob

Javascript hijacking with setters

Greetings, I have a question about getters and setters in prototypes, which are used in the XSS attacks, and probably are depreciated or removed from Rhino and Javascript . E code snippet: // override the constructor used to create objects so // that whenever the "email" field is set, the method // captureObject() will run. Since "email" is the final field, // this will allow us to steal the whole object. function Object() { this.email setter = captureObject; } This example is taken from : www.fortify.com/servlet/download/public/JavaScript_Hijacking.pdf, where that kind of XS

Delegator and StackOverflowError

Hi, I tried to use Delegator class to implement some functionality on variable assignment. I have my object that implements Scriptable and would like to call additional functionality when instances of this objects are assigned to variable. Here is a part of my JUnit test for this class. final Context context = ContextFactory.getGlobal().enterContext(); final ScriptableObject scope = context.initStandardObjects(); final Delegator delegator = new Delegator(scope); ScriptableObject.putConstProperty(delegator, "imports", new ImportsObject(

org.mozilla.javascript.EcmaError: ReferenceError: "ByteString" is not defined.

when exec js in java got the errors ,wonder why got such error and how to solve them thanks!

creating a java outputstream object and converting it to a javascript object

I am trying to use Henri Sivonen's excellent htmlparser written in java from rhino I have gotten stuck using the HtmlSerializer constructor which needs an Outputstream object. nu.validator.htmlparser.sax.HtmlSerializer HtmlSerializer(OutputStream out) I am quite ignorant when it comes to java. Can anyone tell me the easiest way to create an Outpustream object and convert it to a regular js object? I much appreciate the help Here is a link to the function I am trying to use http://about.validator.nu/htmlparser/apidocs/nu/validator/htmlparser/sax/HtmlSerializer.html#HtmlSeriali

Caching wrapped objects in custom WrapFactory

In implementing a WrapFactory I noticed that objects were being wrapped multiple times (probably every time accessed). This thread: http://www.mail-archive.com/dev-tech-js-engine-rhino@lists.mozilla.org/msg00468.html is a discussion of caching the wrapped objects. It uses terms like "weak reference" which scares me, I'm likely to produce a memory issue. I'm wondering if it would help performance or if the reflection lookup work is already being cached. IOW, is caching at the WrapFactory worth the performance improvement, if any? Thanks. -- Daryl Stultz _____________________

Object equality

Hello, Neither == nor === invokes equals() on my Java objects. Should I expect either to return true? Obviously obj1.equals(obj2) works as expected. Sorry my JavaScript is not so good. Is there some method I need to implement to control how == works? Thanks. -- Daryl Stultz _____________________________________ 6 Degrees Software and Consulting, Inc. http://www.6degrees.com mailto:daryl@6degrees.com

RHINO USAGE WARNING: Missed Context.javaToJS() conversion:

Hello, I have the following code: function myFunction(object1) { var object2 = object1; object2 == object1; } That produces this warning: RHINO USAGE WARNING: Missed Context.javaToJS() conversion: Rhino runtime detected object Foo@eb2f0 of class Foo where it expected String, Number, Boolean or Scriptable instance. Please check your code for missing Context.javaToJS() call. Anyone know what I'm supposed to do? object1 and object2 are Foo classes, of course, wrapped to be Scriptable. Thanks. -- Daryl Stultz _____________________________________ 6 Degrees Sof

About the output of the UTF-8 file

Hello C:\>type file.js importPackage(java.io); var file = new PrintWriter( new BufferedWriter( new FileWriter("sample.txt")), "UTF-8"); file.println("For example Multibyte String"); file.close(); C:\>rhino Rhino 1.7 release 2 2009 03 22 js> load("file.js"); Then the "java.io.BufferedWriter@16f8cd0" file that "For example Multibyte String" was described is output, and sample.txt of 0kb is output -------------------------------------- Get Disney character's mail address on Yahoo! Mail http://pr.mail.yahoo.co.jp/disney/

basic questions for Rhino

What I am trying to achieve: Call Java class's method from Javascript What I did so far: 1) I downloaded rhino1_7R2 2) added js.jar (this was located right under directory rhino1_7R2) to my project library 3) created fooclass with ScriptableObject Problems I am getting I am getting an error var pn = new Packages.foo.foo.fooclass(); Error message from FireBug: uncaught exception: Error calling method on NPObject! [plugin exception: java.lang.ClassNotFoundException: foo.foo.fooclass]. Disclaimer: Pardon me if this question might be too simple to ask on this forum.. Any hel

stopping the script evaluation in DebugFrame

hi, i am working with rhino and now i am adding the debug to my implementation. my question: once i got to one of the DebugFrame methods i need to update the UI and wait for the user to tell me how to proceed (resume, terminate) is it possible to stop/terminate the script evaluation so i will be able to update the UI? i would rather not use the observeInstructionCount. is there any better way to stop or suspend the script evaluation? thanks me

help needed: exception while importing package

Hi All, The question might be very fundamental but please bear with me as I'm new to Script support in jvm. I tried to import package oracle.tip.pc.services.translation.framework using importPackage(oracle.tip.pc.services.translation.framework); But, I got the following exception. javax.script.ScriptException: sun.org.mozilla.javascript.internal.EcmaError: ReferenceError: "oracle" is not defined. (<Unknown source>#3) in <Unknown source> at line number 3 at com.sun.script.javascript.RhinoScriptEngine.eval(RhinoScriptEngine.java:110) at javax.script.AbstractScriptEngine.

Maven + Rhino = JAR

Hi guys, I'm not really familiar with Rhino but I want to compile .js source files via a maven plugin to a (bytecode) JAR (so that I can load it in OSGi and call it from another JAR). So far I couldn't find any clues on how to compile JS to JAR with maven. Any ideas? kind regards, stephanos

Memory leak...

I am using Rhino to compile and run .js files from within a servlet. When I hit the servlet from a browser several times, I see each execution creates one or may be more instances of java.lang.ref.Finalizer and never releases it. When I took a heap dump and analyzed it with Eclipse Memory Analyzer I see each java.lang.ref.Finalizer refers to another instance of Finalizer like a chain: java.lang.ref.Finalizer -> java.lang.ref.Finalizer - > java.lang.ref.Finalizer -> java.lang.ref.Finalizer -> and so on. Also, each java.lang.ref.Finalizer would also refer to a FileInputStream

Templating (Parser hack)

Hi, I'am planning on using Rhino as a replacement for JSP, soo I've hacked the parser adding a optional feature to enable a similar syntax: -- cut -- %><h1>Title</h1> <ul> <% for (var i = 1; i <= 10; i++) { %> <li>Item #<%= i %></li> <% } %> </ul> -- cut -- Now some questions: 1. Is anyone else interested is such a feature? 2. Would such a feature, properly implemented, ever be accepted to the main trunk of the Rhino source? 3. If yes. Any tips on how to correctly implement this? I've now just added an additional token '%>template text<%', the parser then creates

JavaScript Objects and Garbage Collection

I am trying to think ahead to make it scalable. In a loop to process messages, I want to work with one message at a time and I am using a JavaScript message object. This message object basically describes the message and could contain large amounts of text, byte data as attachments, etc. I also want to be able to process this message object through different filters and operations before saving it off to a database. This script could also possibly be processing large amounts of messages. I want to be sure that I am not going to run into memory problems,

pid of run rhino js

hi, i run js from shell as below. test.sh java org.mozilla.javascript.tools.shell.Main /path/to/test.js how can i get the pid of it... i use pidof to check it ,but i only can get java pid thanks

how to use java to run javascript by rhino(not j2se 6)

hi, help... how to use java to run javascript by rhino? thanks

from java to run javascript by rhino

hi, help... how can it do java to run many javascript(.js) by rhino ? thanks

Myna Serverside JavaScript Goes Beta

See the bottom of this post for web links. The Myna[1] Javascript Application Server has entered the Beta stage. Myna is an open source Java servlet focused on web development based on the Rhino engine. We are looking for more testers to help make Myna as robust and performant as we can. Here is a short list of features: __Java Servlet__ Myna is a .war file that can be deployed on top of any Java servlet container, so you have a lot of flexibility in deployment platform. The Myna "server" package is just 20MB and includes a lightweight servlet container and startup scripts fo

Debugging JS in Eclipse

Hi everyone. I spend a lot of my time debugging my project, which is written in a combination of JS (compiled with jsc) and Java. It's great that stack traces include entries that point to the relevant line of the JS file from which the compiled bytecode came, but I would like to use an interactive debugger. Using org.mozilla.javascript.tools.debugger is OK for pure JS issues, but my code bounces around a lot between JS and Java. I'd love to be able to use Eclipse and have a unified stack of JS and Java calls (like you see when you printStackTrace()) and be able to inspec

ReferenceError while running from java

Hi, I am running a proxy pac file from java 1.6 and it results in the following exception. Do you have any idea how can I make the isPlainHostName get resolved? javax.script.ScriptException: sun.org.mozilla.javascript.internal.EcmaError: ReferenceError: "isPlainHostName" is not defined. (<Unknown source>#5) in <Unknown source> at line number 5 at com.sun.script.javascript.RhinoScriptEngine.invoke(RhinoScriptEngine.java:184) at com.sun.script.javascript.RhinoScriptEngine.invokeFunction(RhinoScriptEngine.java:142) at Test.main(Test.java:30) Thanks, Giri.

how get debug information from the debug frame

hi, i have followed the very good example of David Parks regarding to how to implement and embed the rhino debugger. i have few questions regarding it: 1) once i am the public void onDebuggerStatement(Context cx) function is being called and i have the context. how can i retrieve the debug information from the context? how can i get all the variables list and their values? 2) what is the use of the contextData that the setDebugger is getting as a parameter? all the examples that i have seen didn't really use it. thanks a lot me

Catch and re-throw in javascript without loosing stack info

Hi list, I've got my application running great with Rhino. I'm at the point now where I want to clean up my exception handling. If I let my script exceptions percolate up to Java, I get correct stack information about where the exception occurred. However, in cases where I want to catch the exception in script, conditionally process it, and maybe re-throw, I don't see how to get the original exception back. I'm hoping there's an API call that I just missed. Here's an example doesThrow = function(){ //stupid, but illustrates the point throw Math.random(); } doesReth

rhino books

Iv'e been looking the net for rhino books, but almost all the information is about rhino 3 d (nto quite what i was looking for). any tips for rhino book search? does any book about rhino actually exist? or perhaps a java book with a chapter about rhino?

Statistics of using non-shared scopes

People are often asking on the Rhino list about using shared top-level scopes for standard objects in server setting for increased speed and possible memory conservation. I'm now redesigning a system that originally used shared scopes, and am experimenting with not using them. The reason for it is that the possibility for crosstalk between otherwise isolated script executions is there, and it also tempts one to use dynamic scopes (which, again, I frown upon especially if I also wish to leverage lexical scoping for OO encapsulation and don't need any nasty surprises ther

Executing google ads script

Hello, I am using Cobra (lobobroswer based parser) for HTML parsing and rhino for javascript parsing of web pages. However, the google ads script is not executing. I want to retrieve the source code of the page including the script generated ads. Please help. Also, is there a way of executing the following script explicitly and returning the result as a string: &lt;script type="text/javascript"> google_ad_client = "pub-"; google_ad_width = 728; google_ad_height = 90; google_ad_format = "728x90_as"; google_ad_type = "text_image"; google_color_border = "FFFFFF"; google_color_bg

Calling Java CLI programs through Rhino

Hey, I've heard a number of things about this project before but only recently dipped my toe in. So far I'm really pleased by what I'm finding -- keep up the good work! One question I had, though, was whether it is possible to blend Java CLI programs with Rhino's shell. I would very much like to combine the scripting power provided by the shell with the functionality present in programs I've written. In this case, I am thinking a little of Microsoft's Powershell as a model. As far as I can tell I am not able to simply invoke a program and pass arguments. Is that correct? How could I go

how to execute the dos program

hi all as title I use the Standard Widget Toolkit to GUI and Rhino to program But I don't know, how to call the "notepad.exe" or other *.exe file when I press the open button Any idea? -- best regards Hidding

Native Decimal support in Rhino

Hi, I've started working on the support of native exact Decimal numbers in Rhino, following the proposition that was formulated by Sam Ruby (with some feedback from Brendand Eich as I understand it): http://intertwingly.net/blog/2008/07/11/Decimal-in-ECMAScript https://bugzilla.mozilla.org/show_bug.cgi?id=445178 I'm mostly done with the implementation in the interpreter, I still need to beef up a bit the test cases to cover more corner cases but overall it seems to work fine. The compiler is another beast (isn't it always?) and I'm confronted with a hard choice so I thought I wo

Instrumenting Javascript using Rhino

Hi, I would like to use Rhino (if possible) to instrument some Javascript code. This means I would need to use the Rhino parser to create an AST, then modify this AST and somehow print out Javascript source code again. Is this possible? Where can I find the documentation I would need? Regards, Frank Groeneveld

Embedding Rhino in an Android app

Hi, all, hoping someone can give me a few pointers as to what I'm doing wrong. I'm trying to embed Rhino in my Android app to add scripting functionality. According to Google, the Rhino shell works fine on Android, which I've confirmed by building and running it from source under Donut. So unless I'm comparing apples and orangutangs, my use case should work too. First I tried the basic embedding examples from the documentation, though I called cx.setOptimization(-1) to disable all compilation. No luck. I then thought that perhaps something was being optimized in the conte