/// <summary>
/// 创建实现了指定接口的HttpApiClient实例
/// </summary>
/// <param name="interfaceType">请求接口类型</param>
/// <param name="apiInterceptor">http接口调用拦截器</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentException"></exception>
/// <exception cref="NotSupportedException"></exception>
/// <exception cref="TypeLoadException"></exception>
/// <returns></returns>
public static HttpApiClient Create(Type interfaceType, IApiInterceptor apiInterceptor)
{
if (interfaceType == null)
{
throw new ArgumentNullException(nameof(interfaceType));
}
if (apiInterceptor == null)
{
throw new ArgumentNullException(nameof(apiInterceptor));
}
return(HttpApiClientProxy.CreateInstance(interfaceType, apiInterceptor));
}
/// <summary>
/// 生成接口的代理类
/// 返回其构造器
/// </summary>
/// <param name="interfaceType">接口类型</param>
/// <param name="apiMethods">拦截的方法</param>
/// <returns></returns>
private static ConstructorInfo GenerateProxyTypeCtor(Type interfaceType, MethodInfo[] apiMethods)
{
var moduleName = interfaceType.Module.Name;
var hashCode = interfaceType.Assembly.GetHashCode() ^ interfaceType.Module.GetHashCode();
// 每个动态集下面只会有一个模块
var moduleBuilder = hashCodeModuleBuilderCache.GetOrAdd(hashCode, (hash) =>
{
return(AssemblyBuilder
.DefineDynamicAssembly(new AssemblyName(hash.ToString()), AssemblyBuilderAccess.Run)
.DefineDynamicModule(moduleName));
});
var typeBuilder = moduleBuilder.DefineType(interfaceType.FullName, TypeAttributes.Class, typeof(HttpApiClient));
typeBuilder.AddInterfaceImplementation(interfaceType);
var proxyType = HttpApiClientProxy.ImplementApiMethods(typeBuilder, apiMethods);
return(proxyType.GetConstructor(proxyTypeCtorArgTypes));
}
