public static FactoryResolutionResult ResolveWebHostFactory(Assembly assembly)
{
// We want to give priority to BuildWebHost over CreateWebHostBuilder for backwards
// compatibility with existing projects that follow the old pattern.
var findResult = ResolveWebHostBuilderFactory(assembly);
switch (findResult.ResultKind)
{
case FactoryResolutionResultKind.NoEntryPoint:
return(findResult);
case FactoryResolutionResultKind.Success:
case FactoryResolutionResultKind.NoCreateWebHostBuilder:
var buildWebHostMethod = findResult.ProgramType.GetTypeInfo().GetDeclaredMethod("BuildWebHost");
if (buildWebHostMethod == null)
{
if (findResult.ResultKind == FactoryResolutionResultKind.Success)
{
return(findResult);
}
return(FactoryResolutionResult.NoBuildWebHost(findResult.ProgramType));
}
else
{
return(FactoryResolutionResult.Succeded(args => (IWebHost)buildWebHostMethod.Invoke(null, new object[] { args }), findResult.ProgramType));
}
case FactoryResolutionResultKind.NoBuildWebHost:
default:
throw new InvalidOperationException();
}
}
public static FactoryResolutionResult ResolveWebHostBuilderFactory(Assembly assembly)
{
var programType = assembly?.EntryPoint?.DeclaringType;
if (programType == null)
{
return(FactoryResolutionResult.NoEntryPoint());
}
var factory = programType?.GetTypeInfo().GetDeclaredMethod(CreateWebHostBuilder);
if (factory == null)
{
return(FactoryResolutionResult.NoCreateWebHostBuilder(programType));
}
return(FactoryResolutionResult.Succeded(args => (IWebHostBuilder)factory.Invoke(null, new object[] { args }), programType));
}
public static FactoryResolutionResult <TWebhost, TWebhostBuilder> ResolveWebHostBuilderFactory <TWebhost, TWebhostBuilder>(Assembly assembly)
{
var programType = assembly?.EntryPoint?.DeclaringType;
if (programType == null)
{
return(FactoryResolutionResult <TWebhost, TWebhostBuilder> .NoEntryPoint());
}
var factory = programType.GetTypeInfo().GetDeclaredMethod(CreateWebHostBuilder);
if (factory == null ||
!typeof(TWebhostBuilder).IsAssignableFrom(factory.ReturnType) ||
factory.GetParameters().Length != 1 ||
!typeof(string []).Equals(factory.GetParameters()[0].ParameterType))
{
return(FactoryResolutionResult <TWebhost, TWebhostBuilder> .NoCreateWebHostBuilder(programType));
}
return(FactoryResolutionResult <TWebhost, TWebhostBuilder> .Succeded(args => (TWebhostBuilder)factory.Invoke(null, new object[] { args }), programType));
}
public static FactoryResolutionResult <TWebhost, TWebhostBuilder> ResolveWebHostFactory <TWebhost, TWebhostBuilder>(Assembly assembly)
{
// We want to give priority to BuildWebHost over CreateWebHostBuilder for backwards
// compatibility with existing projects that follow the old pattern.
var findResult = ResolveWebHostBuilderFactory <TWebhost, TWebhostBuilder>(assembly);
switch (findResult.ResultKind)
{
case FactoryResolutionResultKind.NoEntryPoint:
return(findResult);
case FactoryResolutionResultKind.Success:
case FactoryResolutionResultKind.NoCreateWebHostBuilder:
var buildWebHostMethod = findResult.ProgramType.GetTypeInfo().GetDeclaredMethod(BuildWebHost);
if (buildWebHostMethod == null ||
!typeof(TWebhost).IsAssignableFrom(buildWebHostMethod.ReturnType) ||
buildWebHostMethod.GetParameters().Length != 1 ||
!typeof(string[]).Equals(buildWebHostMethod.GetParameters()[0].ParameterType))
{
if (findResult.ResultKind == FactoryResolutionResultKind.Success)
{
return(findResult);
}
return(FactoryResolutionResult <TWebhost, TWebhostBuilder> .NoBuildWebHost(findResult.ProgramType));
}
else
{
return(FactoryResolutionResult <TWebhost, TWebhostBuilder> .Succeded(args => (TWebhost)buildWebHostMethod.Invoke(null, new object[] { args }), findResult.ProgramType));
}
case FactoryResolutionResultKind.NoBuildWebHost:
default:
throw new InvalidOperationException();
}
}
