/// <summary>
/// This is the main method to call to resolve all dependencies. This MUST be the first method called, which is
/// automatically called by the V8Engine's static constructor. You can also call this directly in a "main" or "startup"
/// file before touching any V8.Net type.
/// </summary>
public static void ResolveDependencies()
{
_CheckLocalPathUpdated();
// ... force load the required assemblies now (this is assuming the method is called from the calling type's static constructor or main startup) ...
//if (!IsLoaded("V8.Net.SharedTypes"))
// Assembly.Load("V8.Net.SharedTypes");
//if (Environment.Is64BitProcess)
//{
// if (!IsLoaded("V8.Net.Proxy.Interface.x64"))
// Assembly.Load("V8.Net.Proxy.Interface.x64");
//}
//else
//{
// if (!IsLoaded("V8.Net.Proxy.Interface.x86"))
// Assembly.Load("V8.Net.Proxy.Interface.x86");
//}
//if (!IsLoaded("V8.Net"))
// Assembly.Load("V8.Net");
var paths = ValidPaths.ToArray();
foreach (var path in paths)
if (TryLoad(path))
return;
var bitStr = Environment.Is64BitProcess ? "x64" : "x86";
var msg = $"Could not locate the required V8 native libraries. V8.NET is running in the '" + bitStr + "' mode. Some areas to check: " + Environment.NewLine
+ "1. Did you download the DLLs from a ZIP file? If so you may have to unblock the file. On Windows, you must open the file properties of the zip file and 'Unblock' it BEFORE extracting the files." + Environment.NewLine
+ "2. Review the searched paths in the nested errors below and make sure the desired path is accessible to the application ";
if (!string.IsNullOrWhiteSpace(_WebHostPath))
msg += "pool identity (usually Read & Execute for 'IIS_IUSRS', or a similar user/group)" + Environment.NewLine;
else
msg += "for loading the required libraries under the current program's security context." + Environment.NewLine;
msg += " Paths searched: " + Environment.NewLine + " * " + string.Join(Environment.NewLine + " * ", paths);
System.Diagnostics.Debug.WriteLine(msg, "WARNING");
if (Environment.UserInteractive)
Console.WriteLine(msg);
if (System.Diagnostics.Debugger.IsAttached)
throw new DllNotFoundException(msg + Environment.NewLine + "This exception is thrown as a notice since a debugger is attached. You can always use a try..catch block to ignore it.");
}
static void _CheckLocalPathUpdated()
{
if (!_LocalPathEnvUpdated)
{
try
{
// ... add the search location to the path so "Assembly.LoadFrom()" can find other dependant assemblies if needed ...
// ... attempt to update environment variable automatically for the native DLLs ...
// (see: http://stackoverflow.com/questions/7996263/how-do-i-get-iis-to-load-a-native-dll-referenced-by-my-wcf-service
// and http://stackoverflow.com/questions/344608/unmanaged-dlls-fail-to-load-on-asp-net-server)
var path = System.Environment.GetEnvironmentVariable("PATH"); // TODO: Detect other systems if necessary.
var newPaths = string.Join(";", ValidPaths.ToArray()) + ";";
System.Environment.SetEnvironmentVariable("PATH", newPaths + path);
_LocalPathEnvUpdated = true;
}
catch { }
}
}
