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New Post: Elevated library layer

January 15, 2015, 4:49 am
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Hello Querty,

Suppose you have a class that provides sensitive host functionality:
publicclass HostLib {
    publicvoid Log(string message) {
        Console.WriteLine(message);
    }
}
Here's how you might create a script library that uses that class without exposing it to other script code:
dynamic createScriptLib = engine.Evaluate(@"
    (function (hostLib) {
        return {
            log: function (message) {
                hostLib.Log(message);
            }
        };
    }).valueOf()
");

engine.Script.lib = createScriptLib(new HostLib());
With this setup, additional script code (such as the plugin code) can invoke the "elevated" library (e.g., lib.log('Hello, world!')), but it has no access to the host object that provides the underlying functionality.

Good luck!
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New Post: Elevated library layer

January 15, 2015, 10:01 am
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This is just the idea I was looking for. Thanks!
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Created Unassigned: Missing DLLs on new project [65]

January 16, 2015, 1:55 am
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When I create the ScriptEngine i got

System.TypeLoadException was unhandled _HResult=-2146233054
_message=Cannot load V8 interface assembly; verify that the following files are installed with your application: ClearScriptV8-32.dll, ClearScriptV8-64.dll, v8-ia32.dll, v8-x64.dll

I've posted more detauls for this issue also on stackoverflow

see: http://stackoverflow.com/questions/27981220/missing-clearscriptv8-64-dll-v8-ia32-dll-v8-x64-dll

Any advice?
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Commented Unassigned: Missing DLLs on new project [65]

January 16, 2015, 4:45 am
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When I create the ScriptEngine i got

System.TypeLoadException was unhandled _HResult=-2146233054
_message=Cannot load V8 interface assembly; verify that the following files are installed with your application: ClearScriptV8-32.dll, ClearScriptV8-64.dll, v8-ia32.dll, v8-x64.dll

I've posted more detauls for this issue also on stackoverflow

see: http://stackoverflow.com/questions/27981220/missing-clearscriptv8-64-dll-v8-ia32-dll-v8-x64-dll

Any advice?
Comments: Greetings! It looks like you've resolved your issue by switching to another NuGet package. In general, we don't distribute ClearScript binaries. If you encounter issues with a NuGet package, please contact the package owners. If you'd like to build ClearScript from source code, we recommend that you download the [latest release](https://clearscript.codeplex.com/releases/view/135637) and follow the procedure detailed in the [ReadMe](https://clearscript.codeplex.com/SourceControl/BrowseLatest#ReadMe.txt). Thanks!
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Closed Unassigned: Missing DLLs on new project [65]

January 16, 2015, 4:46 am
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When I create the ScriptEngine i got

System.TypeLoadException was unhandled _HResult=-2146233054
_message=Cannot load V8 interface assembly; verify that the following files are installed with your application: ClearScriptV8-32.dll, ClearScriptV8-64.dll, v8-ia32.dll, v8-x64.dll

I've posted more detauls for this issue also on stackoverflow

see: http://stackoverflow.com/questions/27981220/missing-clearscriptv8-64-dll-v8-ia32-dll-v8-x64-dll

Any advice?
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Edited Issue: Missing DLLs on new project [65]

January 16, 2015, 4:46 am
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When I create the ScriptEngine i got

System.TypeLoadException was unhandled _HResult=-2146233054
_message=Cannot load V8 interface assembly; verify that the following files are installed with your application: ClearScriptV8-32.dll, ClearScriptV8-64.dll, v8-ia32.dll, v8-x64.dll

I've posted more detauls for this issue also on stackoverflow

see: http://stackoverflow.com/questions/27981220/missing-clearscriptv8-64-dll-v8-ia32-dll-v8-x64-dll

Any advice?
↧

Commented Issue: Access violation running V8 tests in Visual Studio [60]

January 20, 2015, 1:39 pm
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Whenever I try to run a test under xUnit using the built in Visual Studio Test Runner (with xUnit plugin) containing the V8Runtime, I get either an AccessViolation or an SEHException. The strange thing is the exception does not occur if I debug the test (with/without break points).

Environment: Visual 2013 Update 4 Test Runner, xUnit 1.9.2.1705, code to recreate:

[Fact]
public void TestAccessException() {
var runtime = new V8Runtime("Test Context");
}

Stack trace:

System.Reflection.TargetInvocationException : Exception has been thrown by the target of an invocation.
---- System.Runtime.InteropServices.SEHException : External component has thrown an exception.
Result StackTrace:
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, Object[] args)
at Microsoft.ClearScript.V8.V8Proxy.CreateImpl[T](Object[] args) in c:\dev\ClearScript\ClearScript\V8\V8Proxy.cs:line 93
at Microsoft.ClearScript.V8.V8IsolateProxy.Create(String name, V8RuntimeConstraints constraints, Boolean enableDebugging, Int32 debugPort) in c:\dev\ClearScript\ClearScript\V8\V8IsolateProxy.cs:line 70
at Microsoft.ClearScript.V8.V8Runtime..ctor(String name, V8RuntimeConstraints constraints, V8RuntimeFlags flags, Int32 debugPort) in c:\dev\ClearScript\ClearScript\V8\V8Runtime.cs:line 204
at Microsoft.ClearScript.V8.V8Runtime..ctor(String name) in c:\dev\ClearScript\ClearScript\V8\V8Runtime.cs:line 98
at FlowAPI.Scripting.JavascriptRunner..ctor() in c:\dev\FlowAPI\FlowAPI.Scripting\JavascriptRunner.cs:line 20
at FlowAPI.Server.Tests.Scripting.TestScripting.TestV8ScriptingMultiCall() in c:\dev\FlowAPI\FlowAPI.Server.Tests\Scripting\TestScripting.cs:line 20
----- Inner Stack Trace -----
at V8Isolate.Create(StdString* , V8IsolateConstraints* , Boolean , Int32 )
at Microsoft.ClearScript.V8.V8IsolateProxyImpl..ctor(String gcName, V8RuntimeConstraints gcConstraints, Boolean enableDebugging, Int32 debugPort) in c:\dev\clearscript\clearscript\v8\clearscriptv8\v8isolateproxyimpl.cpp:line 86


Comments: We are seeing a similar issue with our MVC application that uses ClearScript. We did not run into this issue until we upgraded to 5.4 The exception is thrown by IIS after we rebuild the solution or bump the web.config. Can you suggest a workaround for an IIS hosted app? Is there an estimated date for the next version of ClearScript?
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New Post: Debugging ClearScript in ASP.NET

January 22, 2015, 2:41 pm
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User julesx416 posted the following question:

Is it possible to attach a debugger to an asp.net instance that has a V8 engine loaded?

I want to be able to see the script being executed, set breakpoints and so forth.

Thank you!
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New Post: Debugging ClearScript in ASP.NET

January 22, 2015, 2:51 pm
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Hello!

Yes, in the ClearScript ReadMe, please see the section "Debugging with ClearScript and V8".

Good luck!
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New Post: Debugging ClearScript in ASP.NET

January 23, 2015, 5:01 am
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Is there any way to do it remotely? Like the visual studio remote remote debugger.
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Commented Issue: Access violation running V8 tests in Visual Studio [60]

January 20, 2015, 7:56 pm
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Whenever I try to run a test under xUnit using the built in Visual Studio Test Runner (with xUnit plugin) containing the V8Runtime, I get either an AccessViolation or an SEHException. The strange thing is the exception does not occur if I debug the test (with/without break points).

Environment: Visual 2013 Update 4 Test Runner, xUnit 1.9.2.1705, code to recreate:

[Fact]
public void TestAccessException() {
var runtime = new V8Runtime("Test Context");
}

Stack trace:

System.Reflection.TargetInvocationException : Exception has been thrown by the target of an invocation.
---- System.Runtime.InteropServices.SEHException : External component has thrown an exception.
Result StackTrace:
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, Object[] args)
at Microsoft.ClearScript.V8.V8Proxy.CreateImpl[T](Object[] args) in c:\dev\ClearScript\ClearScript\V8\V8Proxy.cs:line 93
at Microsoft.ClearScript.V8.V8IsolateProxy.Create(String name, V8RuntimeConstraints constraints, Boolean enableDebugging, Int32 debugPort) in c:\dev\ClearScript\ClearScript\V8\V8IsolateProxy.cs:line 70
at Microsoft.ClearScript.V8.V8Runtime..ctor(String name, V8RuntimeConstraints constraints, V8RuntimeFlags flags, Int32 debugPort) in c:\dev\ClearScript\ClearScript\V8\V8Runtime.cs:line 204
at Microsoft.ClearScript.V8.V8Runtime..ctor(String name) in c:\dev\ClearScript\ClearScript\V8\V8Runtime.cs:line 98
at FlowAPI.Scripting.JavascriptRunner..ctor() in c:\dev\FlowAPI\FlowAPI.Scripting\JavascriptRunner.cs:line 20
at FlowAPI.Server.Tests.Scripting.TestScripting.TestV8ScriptingMultiCall() in c:\dev\FlowAPI\FlowAPI.Server.Tests\Scripting\TestScripting.cs:line 20
----- Inner Stack Trace -----
at V8Isolate.Create(StdString* , V8IsolateConstraints* , Boolean , Int32 )
at Microsoft.ClearScript.V8.V8IsolateProxyImpl..ctor(String gcName, V8RuntimeConstraints gcConstraints, Boolean enableDebugging, Int32 debugPort) in c:\dev\clearscript\clearscript\v8\clearscriptv8\v8isolateproxyimpl.cpp:line 86


Comments: Hello! Could you please post a stack trace? We'd like to make sure the issue you're seeing with IIS is the same as the one we saw with the VS unit test runner. The next point release should be out within the two weeks. Thanks for your patience.
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Commented Issue: Access violation running V8 tests in Visual Studio [60]

January 20, 2015, 8:48 pm
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Whenever I try to run a test under xUnit using the built in Visual Studio Test Runner (with xUnit plugin) containing the V8Runtime, I get either an AccessViolation or an SEHException. The strange thing is the exception does not occur if I debug the test (with/without break points).

Environment: Visual 2013 Update 4 Test Runner, xUnit 1.9.2.1705, code to recreate:

[Fact]
public void TestAccessException() {
var runtime = new V8Runtime("Test Context");
}

Stack trace:

System.Reflection.TargetInvocationException : Exception has been thrown by the target of an invocation.
---- System.Runtime.InteropServices.SEHException : External component has thrown an exception.
Result StackTrace:
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, Object[] args)
at Microsoft.ClearScript.V8.V8Proxy.CreateImpl[T](Object[] args) in c:\dev\ClearScript\ClearScript\V8\V8Proxy.cs:line 93
at Microsoft.ClearScript.V8.V8IsolateProxy.Create(String name, V8RuntimeConstraints constraints, Boolean enableDebugging, Int32 debugPort) in c:\dev\ClearScript\ClearScript\V8\V8IsolateProxy.cs:line 70
at Microsoft.ClearScript.V8.V8Runtime..ctor(String name, V8RuntimeConstraints constraints, V8RuntimeFlags flags, Int32 debugPort) in c:\dev\ClearScript\ClearScript\V8\V8Runtime.cs:line 204
at Microsoft.ClearScript.V8.V8Runtime..ctor(String name) in c:\dev\ClearScript\ClearScript\V8\V8Runtime.cs:line 98
at FlowAPI.Scripting.JavascriptRunner..ctor() in c:\dev\FlowAPI\FlowAPI.Scripting\JavascriptRunner.cs:line 20
at FlowAPI.Server.Tests.Scripting.TestScripting.TestV8ScriptingMultiCall() in c:\dev\FlowAPI\FlowAPI.Server.Tests\Scripting\TestScripting.cs:line 20
----- Inner Stack Trace -----
at V8Isolate.Create(StdString* , V8IsolateConstraints* , Boolean , Int32 )
at Microsoft.ClearScript.V8.V8IsolateProxyImpl..ctor(String gcName, V8RuntimeConstraints gcConstraints, Boolean enableDebugging, Int32 debugPort) in c:\dev\clearscript\clearscript\v8\clearscriptv8\v8isolateproxyimpl.cpp:line 86


Comments: Hello! Could you please post a stack trace? We'd like to make sure the issue you're seeing with IIS is the same as the one we saw with the VS unit test runner. The next point release should be out within two weeks. Thanks for your patience.
↧

Commented Issue: Access violation running V8 tests in Visual Studio [60]

January 21, 2015, 9:18 am
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Whenever I try to run a test under xUnit using the built in Visual Studio Test Runner (with xUnit plugin) containing the V8Runtime, I get either an AccessViolation or an SEHException. The strange thing is the exception does not occur if I debug the test (with/without break points).

Environment: Visual 2013 Update 4 Test Runner, xUnit 1.9.2.1705, code to recreate:

[Fact]
public void TestAccessException() {
var runtime = new V8Runtime("Test Context");
}

Stack trace:

System.Reflection.TargetInvocationException : Exception has been thrown by the target of an invocation.
---- System.Runtime.InteropServices.SEHException : External component has thrown an exception.
Result StackTrace:
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, Object[] args)
at Microsoft.ClearScript.V8.V8Proxy.CreateImpl[T](Object[] args) in c:\dev\ClearScript\ClearScript\V8\V8Proxy.cs:line 93
at Microsoft.ClearScript.V8.V8IsolateProxy.Create(String name, V8RuntimeConstraints constraints, Boolean enableDebugging, Int32 debugPort) in c:\dev\ClearScript\ClearScript\V8\V8IsolateProxy.cs:line 70
at Microsoft.ClearScript.V8.V8Runtime..ctor(String name, V8RuntimeConstraints constraints, V8RuntimeFlags flags, Int32 debugPort) in c:\dev\ClearScript\ClearScript\V8\V8Runtime.cs:line 204
at Microsoft.ClearScript.V8.V8Runtime..ctor(String name) in c:\dev\ClearScript\ClearScript\V8\V8Runtime.cs:line 98
at FlowAPI.Scripting.JavascriptRunner..ctor() in c:\dev\FlowAPI\FlowAPI.Scripting\JavascriptRunner.cs:line 20
at FlowAPI.Server.Tests.Scripting.TestScripting.TestV8ScriptingMultiCall() in c:\dev\FlowAPI\FlowAPI.Server.Tests\Scripting\TestScripting.cs:line 20
----- Inner Stack Trace -----
at V8Isolate.Create(StdString* , V8IsolateConstraints* , Boolean , Int32 )
at Microsoft.ClearScript.V8.V8IsolateProxyImpl..ctor(String gcName, V8RuntimeConstraints gcConstraints, Boolean enableDebugging, Int32 debugPort) in c:\dev\clearscript\clearscript\v8\clearscriptv8\v8isolateproxyimpl.cpp:line 86


Comments: Here is the requested StackTrace ``` at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark) at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) at System.Activator.CreateInstance(Type type, Object[] args) at Microsoft.ClearScript.V8.V8Proxy.CreateImpl[T](Object[] args) at Microsoft.ClearScript.V8.V8IsolateProxy.Create(String name, V8RuntimeConstraints constraints, Boolean enableDebugging, Int32 debugPort) at Microsoft.ClearScript.V8.V8Runtime..ctor(String name, V8RuntimeConstraints constraints, V8RuntimeFlags flags, Int32 debugPort) at Microsoft.ClearScript.V8.V8Runtime..ctor(String name, V8RuntimeConstraints constraints, V8RuntimeFlags flags) at Microsoft.ClearScript.V8.V8Runtime..ctor(String name, V8RuntimeConstraints constraints) at Microsoft.ClearScript.V8.V8ScriptEngine..ctor(V8Runtime runtime, String name, V8RuntimeConstraints constraints, V8ScriptEngineFlags flags, Int32 debugPort) at Microsoft.ClearScript.V8.V8ScriptEngine..ctor(String name, V8RuntimeConstraints constraints, V8ScriptEngineFlags flags, Int32 debugPort) at Microsoft.ClearScript.V8.V8ScriptEngine..ctor(V8ScriptEngineFlags flags, Int32 debugPort) at Microsoft.ClearScript.V8.V8ScriptEngine..ctor(V8ScriptEngineFlags flags) ```
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Commented Issue: Access violation running V8 tests in Visual Studio [60]

January 21, 2015, 12:26 pm
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Whenever I try to run a test under xUnit using the built in Visual Studio Test Runner (with xUnit plugin) containing the V8Runtime, I get either an AccessViolation or an SEHException. The strange thing is the exception does not occur if I debug the test (with/without break points).

Environment: Visual 2013 Update 4 Test Runner, xUnit 1.9.2.1705, code to recreate:

[Fact]
public void TestAccessException() {
var runtime = new V8Runtime("Test Context");
}

Stack trace:

System.Reflection.TargetInvocationException : Exception has been thrown by the target of an invocation.
---- System.Runtime.InteropServices.SEHException : External component has thrown an exception.
Result StackTrace:
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, Object[] args)
at Microsoft.ClearScript.V8.V8Proxy.CreateImpl[T](Object[] args) in c:\dev\ClearScript\ClearScript\V8\V8Proxy.cs:line 93
at Microsoft.ClearScript.V8.V8IsolateProxy.Create(String name, V8RuntimeConstraints constraints, Boolean enableDebugging, Int32 debugPort) in c:\dev\ClearScript\ClearScript\V8\V8IsolateProxy.cs:line 70
at Microsoft.ClearScript.V8.V8Runtime..ctor(String name, V8RuntimeConstraints constraints, V8RuntimeFlags flags, Int32 debugPort) in c:\dev\ClearScript\ClearScript\V8\V8Runtime.cs:line 204
at Microsoft.ClearScript.V8.V8Runtime..ctor(String name) in c:\dev\ClearScript\ClearScript\V8\V8Runtime.cs:line 98
at FlowAPI.Scripting.JavascriptRunner..ctor() in c:\dev\FlowAPI\FlowAPI.Scripting\JavascriptRunner.cs:line 20
at FlowAPI.Server.Tests.Scripting.TestScripting.TestV8ScriptingMultiCall() in c:\dev\FlowAPI\FlowAPI.Server.Tests\Scripting\TestScripting.cs:line 20
----- Inner Stack Trace -----
at V8Isolate.Create(StdString* , V8IsolateConstraints* , Boolean , Int32 )
at Microsoft.ClearScript.V8.V8IsolateProxyImpl..ctor(String gcName, V8RuntimeConstraints gcConstraints, Boolean enableDebugging, Int32 debugPort) in c:\dev\clearscript\clearscript\v8\clearscriptv8\v8isolateproxyimpl.cpp:line 86


Comments: Thanks. That does looks like the same issue. V8 was definitely not designed for environments that "recycle" processes by unloading and reloading modules. ClearScript 5.4.1 will address this issue.
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Created Unassigned: Debugging clearscript in asp.net [66]

January 22, 2015, 1:02 pm
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Is it possible to attach a debugger to an asp.net instance that has a V8 engine loaded?

I want to be able to see the script being executed, set breakpoints and so forth.

Thank you!
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Closed Unassigned: Debugging clearscript in asp.net [66]

January 22, 2015, 2:46 pm
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Is it possible to attach a debugger to an asp.net instance that has a V8 engine loaded?

I want to be able to see the script being executed, set breakpoints and so forth.

Thank you!
Comments: Moved to a [discussion topic](https://clearscript.codeplex.com/discussions/578397). Please use the [Discussions](https://clearscript.codeplex.com/discussions) area for questions. Thanks!
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Edited Task: Debugging clearscript in asp.net [66]

January 22, 2015, 2:46 pm
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Is it possible to attach a debugger to an asp.net instance that has a V8 engine loaded?

I want to be able to see the script being executed, set breakpoints and so forth.

Thank you!
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New Post: SignalR in ClearScript

January 24, 2015, 7:37 pm
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I am creating a Windows forms app that uses ClearScript. Users will write their own scripts to perform specific tasks to simulate a manufacturing process. The key to the app is that it must communicate with real time control systems in a lab/development environment. I created a SignalR server that provides connectivity to the real time control system and will provide javascript scaffolding that gets loaded into a V8 engine. The users then write their scripts and read write from the real time systems with little or no code on their part as I will have classes for them that greatly simplify that piece of the system.

The problem I have is that SinglaR javascript client code is based on jQuery and requires a DOM and a browser Window object - which don't exist in ClearScript.

Am I trying to mix oil and water or is there a way to skin this cat somehow?

BTW: My SingnalR server is running on a Windows 7 machine so it cannot communicate over websockets.
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New Post: Debugging ClearScript in ASP.NET

January 25, 2015, 12:13 pm
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Hi again,
​
Is there any way to do it remotely? Like the visual studio remote remote debugger.
​
To be honest, we haven't tried it, but V8's debugging protocol is TCP/IP-based, and Eclipse's "Debug Configurations" dialog does allow you to enter the host's IP address as well as the port.

Thanks!
↧

New Post: SignalR in ClearScript

January 26, 2015, 6:48 am
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Greetings!

Unfortunately many JavaScript libraries assume that they're running in a particular environment (web browser, Node.js, etc.) and are not readily usable in the sort of bare application scripting environment that ClearScript provides.

On the other hand, JavaScript is a very flexible language with dynamic typing, and depending on how much of the DOM the script requires, it might be possible to accommodate it without replicating the entire DOM. For example, ClearScriptBenchmarks mocks out just enough to accommodate SunSpider.

Is that a possibility in your scenario? What does SignalR's client script use the DOM for?

Thanks!
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