public AutoJSContext()
{
nsIJSRuntimeService runtimeService = (nsIJSRuntimeService)Xpcom.GetService("@mozilla.org/js/xpc/RuntimeService;1");
IntPtr jsRuntime = runtimeService.GetRuntime();
IntPtr cx = JS_NewContext(jsRuntime, 8192);
nsIJSContextStack contextStack = Xpcom.GetService <nsIJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
contextStack.Push(cx);
nsIPrincipal system = Xpcom.GetService <nsIScriptSecurityManager>("@mozilla.org/scriptsecuritymanager;1").GetSystemPrincipal();
IntPtr jsPrincipals = system.GetJSPrincipals(cx);
JSStackFrame frame = new JSStackFrame();
frame.script = JS_CompileScriptForPrincipals(cx, JS_GetGlobalObject(cx), jsPrincipals, "", 0, "", 1);
//NOTE: this code is based on the definition of JSContext from mozilla 1.8 and will not work for other versions
IntPtr old = Marshal.ReadIntPtr(cx, 0x34);
frame.down = old;
IntPtr framePtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(JSStackFrame)));
Marshal.StructureToPtr(frame, framePtr, true);
// cx->fp = framePtr;
Marshal.WriteIntPtr(cx, 0x34, framePtr);
}
/// <summary>
/// Create a AutoJSContext using the SafeJSContext.
/// If context is IntPtr.Zero use the SafeJSContext
/// </summary>
/// <param name="context"></param>
public AutoJSContext(IntPtr context)
{
if (context == IntPtr.Zero)
{
_jsContextStack = Xpcom.GetService <nsIThreadJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
context = _jsContextStack.GetSafeJSContextAttribute();
}
_cx = context;
// begin a new request
JS_BeginRequest(_cx);
// push the context onto the context stack
_contextStack = Xpcom.GetService <nsIJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
_contextStack.Push(_cx);
// obtain the system principal (no security checks) (one could get a different principal by calling securityManager.GetObjectPrincipal())
_securityManager = Xpcom.GetService <nsIScriptSecurityManager>("@mozilla.org/scriptsecuritymanager;1");
_systemPrincipal = _securityManager.GetSystemPrincipal();
_jsPrincipals = _systemPrincipal.GetJSPrincipals(_cx);
_securityManager.PushContextPrincipal(_cx, IntPtr.Zero, _systemPrincipal);
}
public void Dispose()
{
nsIScriptSecurityManager securityManager = Xpcom.GetService <nsIScriptSecurityManager>("@mozilla.org/scriptsecuritymanager;1");
securityManager.PopContextPrincipal(cx);
nsIJSContextStack contextStack = Xpcom.GetService <nsIJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
contextStack.Pop();
JS_EndRequest(cx);
}
public void Dispose()
{
nsIJSContextStack contextStack = Xpcom.GetService<nsIJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
contextStack.Pop();
// free the memory allocated for the fake stack frame
Marshal.FreeHGlobal(Marshal.ReadIntPtr(cx, OfsetOfFP));
// end the request, destroy the context
JS_EndRequest(cx);
JS_DestroyContextNoGC(cx);
}
/// <summary>
/// Create a AutoJSContext using the SafeJSContext.
/// If context is IntPtr.Zero use the SafeJSContext
/// </summary>
/// <param name="context"></param>
public AutoJSContext(IntPtr context)
{
if (context == IntPtr.Zero)
{
context = GlobalJSContextHolder.SafeJSContext;
}
_cx = context;
// TODO: calling BeginRequest may not be neccessary anymore.
// begin a new request
SpiderMonkey.JS_BeginRequest(_cx);
// TODO: pushing the context onto the context stack may not be neccessary anymore.
// push the context onto the context stack
_contextStack = Xpcom.GetService <nsIJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
_contextStack.Push(_cx);
}
public AutoJSContext()
{
var jsContextStack = Xpcom.GetService <nsIThreadJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
cx = jsContextStack.GetSafeJSContextAttribute();
// begin a new request
JS_BeginRequest(cx);
// push the context onto the context stack
nsIJSContextStack contextStack = Xpcom.GetService <nsIJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
contextStack.Push(cx);
// obtain the system principal (no security checks)
nsIScriptSecurityManager securityManager = Xpcom.GetService <nsIScriptSecurityManager>("@mozilla.org/scriptsecuritymanager;1");
nsIPrincipal system = securityManager.GetSystemPrincipal();
IntPtr jsPrincipals = system.GetJSPrincipals(cx);
securityManager.PushContextPrincipal(cx, IntPtr.Zero, system);
}
public AutoJSContext()
{
// obtain the JS runtime used by gecko
nsIJSRuntimeService runtimeService = (nsIJSRuntimeService)Xpcom.GetService("@mozilla.org/js/xpc/RuntimeService;1");
IntPtr jsRuntime = runtimeService.GetRuntimeAttribute();
// create a new JSContext
cx = JS_NewContext(jsRuntime, 8192);
// begin a new request
JS_BeginRequest(cx);
// push the context onto the context stack
nsIJSContextStack contextStack = Xpcom.GetService <nsIJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
contextStack.Push(cx);
// obtain the system principal (no security checks) which we will use when compiling the empty script below
nsIPrincipal system = Xpcom.GetService <nsIScriptSecurityManager>("@mozilla.org/scriptsecuritymanager;1").GetSystemPrincipal();
IntPtr jsPrincipals = system.GetJSPrincipals(cx);
// create a fake stack frame
JSStackFrame frame = new JSStackFrame();
frame.script = JS_CompileScriptForPrincipals(cx, JS_GetGlobalObject(cx), jsPrincipals, "", 0, "", 1);
// put a pointer to the fake stack frame on the JSContext
// frame.down = cx->fp
IntPtr old = Marshal.ReadIntPtr(cx, OfsetOfFP);
frame.down = old;
IntPtr framePtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(JSStackFrame)));
Marshal.StructureToPtr(frame, framePtr, true);
// cx->fp = framePtr;
Marshal.WriteIntPtr(cx, OfsetOfFP, framePtr);
}
/// <summary>
/// Create a AutoJSContext using the SafeJSContext.
/// If context is IntPtr.Zero use the SafeJSContext
/// </summary>
/// <param name="context"></param>
public AutoJSContext(IntPtr context)
{
if (context == IntPtr.Zero)
{
_jsContextStack = Xpcom.GetService<nsIThreadJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
context = _jsContextStack.GetSafeJSContextAttribute();
}
_cx = context;
// begin a new request
SpiderMonkey.JS_BeginRequest(_cx);
// push the context onto the context stack
_contextStack = Xpcom.GetService<nsIJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
_contextStack.Push(_cx);
// obtain the system principal (no security checks) (one could get a different principal by calling securityManager.GetObjectPrincipal())
_securityManager = Xpcom.GetService<nsIScriptSecurityManager>("@mozilla.org/scriptsecuritymanager;1");
_systemPrincipal = _securityManager.GetSystemPrincipal();
_securityManager.PushContextPrincipal(_cx, IntPtr.Zero, _systemPrincipal);
}
public void Dispose()
{
nsIJSContextStack contextStack = Xpcom.GetService <nsIJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
contextStack.Pop();
}
/// <summary>
/// Create a AutoJSContext using the SafeJSContext.
/// If context is IntPtr.Zero use the SafeJSContext
/// </summary>
/// <param name="context"></param>
public AutoJSContext(IntPtr context)
{
if (context == IntPtr.Zero)
{
_jsContextStack = Xpcom.GetService<nsIThreadJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
// Due to GetSafeJSContext (being changed from an attribute to a virtual method in FF 15) we can no longer call
// it safely from C#. // TODO: find a better solution for this.
context = _jsContextStack.GetSafeJSContext();
}
_cx = context;
// TODO: calling BeginRequest may not be neccessary anymore.
// begin a new request
SpiderMonkey.JS_BeginRequest(_cx);
// TODO: pushing the context onto the context stack may not be neccessary anymore.
// push the context onto the context stack
_contextStack = Xpcom.GetService<nsIJSContextStack>( Contracts.JsContextStack );
_contextStack.Push(_cx);
// PushContextPrinciple was removed in firefox 16.
// TODO: It would be nice to get elevated security when running javascript from geckofx.
#if false
// obtain the system principal (no security checks) (one could get a different principal by calling securityManager.GetObjectPrincipal())
if (_securityManager == null)
{
_securityManager = Xpcom.GetService<nsIScriptSecurityManager>("@mozilla.org/scriptsecuritymanager;1");
}
_systemPrincipal = _securityManager.GetSystemPrincipal();
_securityManager.PushContextPrincipal(_cx, IntPtr.Zero, _systemPrincipal);
#endif
}
