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JSer.info event @ Jan 2016](https://image.slidesharecdn.com/activescripting-160116082030/85/Active-scripting-1-320.jpg)
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JSer.info event @ Jan 2016](https://image.slidesharecdn.com/activescripting-160116082030/75/Active-scripting-1-2048.jpg)
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Active scripting
Active Scripting was the interface used by Internet Explorer versions 3 through 8 to bind scripting engines like JScript and VBScript. It provided COM interfaces for the scripting engine and host applications to communicate. Active Scripting was used by IE, Windows Script Host, ASP, Office applications, and other third party apps to integrate scripting. It required scripting engines to implement interfaces like IAcriptScript and allowed hosts like IE to debug scripts through COM debugging APIs. With IE9, Microsoft moved to a new scripting model that replaced Active Scripting.
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Active scripting
- 1. [R.I.P. IE8] ActiveScripting JSer.info event @ Jan 2016
- 2.
- 3. IE 4-8 Architecture •HTML Parse and Render … MsHtml • Browser UX … BrowseUI / ShDocVw -> IEFrame (IE7+) • Networking Stack … WinInet and UrlMon • Scripting … Active Scripting Host
- 4. APIs by IE •Web Browser controls using COM APIs • Browser Helper Object (BHO) APIs for browser extension (ex. Toolbar etc) • Pluggable Protocol Moniker • ActiveScripting
- 5. Active Scripting • COMinterfaces to bind scripting engine • For Engine API • For Host API • Used by • IE (3?-8) • Windows Scripting Host • Active server page (IIS) • Office • 3rd party Apps
- 6. Backends • By Microsoft •JScript • VBScript • By 3rd party • Ruby • Python • Perl • PHP • etc
- 7. Security? <script language=“python”> import __builtin__ myfile= __builtin__.open(“c:¥¥autoexec.bat”) document.write(str(myfile.readlines())) myfile.close() </script> http://www.python.jp/pipermail/python-ml-jp/2002- January/000977.html
- 8. COM Interfaces • IEuses IDispatchEx interface to access methods and properties • As IE, Script was a kind of COM
- 9. this access fromHost Apps (IE) // Invoke method with "this" pointer DISPID putid = DISPID_THIS; VARIANT var; DISPPARAM disparams; IDispatchEx* pdexObj; var.vt = VT_DISPATCH; var.pdispVal = pdispObj; dispparams.rgvarg = &var; dispparams.rgdispidNamedArgs = &putid; dispparams.cArgs = 1; dispparams.cNamedArgs = 1; pdexObj->InvokeEx(dispid, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &dispparams, NULL, NULL, NULL);
- 10. Implement Scripting Engine •Engine must implement IAcriptScript* interfaces such as IActiveScriptHost etc • When using on IE, mark as safe like ActiveX control
- 11. Debugger Support • DebuggingAPIs (COM APIs) to integrate IDE • Profiler API is IE9+ • PDM (Process Debug Manager)
- 12. Conclusion • Active Scriptingis the binding interface used by IE8 (not IE9+) • APIs is for host, engine and debugging • Bye Bye IE8!
- 13. References • Windows Scriptinterfaces • https://msdn.microsoft.com/en-us/library/fdee6589%28v=vs.94%29.aspx • Active Scripting APIs: Add Powerful Custom Debugging to Your Script- Hosting App • https://msdn.microsoft.com/en-us/library/bb984890.aspx • Microsoft Press – Inside Windows Debugging