FeignClientMethodInfo BuildMethod(TypeBuilder typeBuilder, Type serviceType, MethodInfo method, FeignClientAttribute feignClientAttribute, RequestMappingBaseAttribute requestMapping)
{
FeignClientMethodInfo feignClientMethodInfo = new FeignClientMethodInfo
{
MethodId = GetMethodId(method),
MethodMetadata = method
};
//创建方法
MethodBuilder methodBuilder = CreateMethodBuilder(typeBuilder, method);
ILGenerator iLGenerator = methodBuilder.GetILGenerator();
if (requestMapping == null)
{
//如果找不到mapping,抛出 NotSupportedException 异常
iLGenerator.Emit(OpCodes.Newobj, typeof(NotSupportedException).GetConstructor(Type.EmptyTypes));
iLGenerator.Emit(OpCodes.Throw);
return(new FeignClientMethodInfo
{
MethodId = GetMethodId(method),
MethodMetadata = method
});
}
string uri = requestMapping.Value ?? "";
LocalBuilder local_Uri = iLGenerator.DeclareLocal(typeof(string)); // 定义uri
iLGenerator.Emit(OpCodes.Ldstr, uri);
iLGenerator.Emit(OpCodes.Stloc, local_Uri);
List <EmitRequestContent> emitRequestContents = EmitParameter(typeBuilder, requestMapping, iLGenerator, method, local_Uri);
EmitCallMethod(typeBuilder, methodBuilder, iLGenerator, serviceType, feignClientMethodInfo, requestMapping, local_Uri, emitRequestContents);
methodBuilder.CopyCustomAttributes(method);
return(feignClientMethodInfo);
}