C# 如何从字节[]加载程序集以在ASP.NET Core的Razor视图中使用？

背景 你好我们的.NET5Web应用程序遵循“插件”体系结构。我们在整个网站上都有不同的模块，它们的独特性足以保证它们在我们的解决方案中有自己的项目。在应用程序开始时，我们的“主”应用程序加载已编译的DLL。目前，我们正在将我们的应用程序迁移到云端，并向微服务架构过渡。最终，我们尝试将编译后的DLL存储在AWSS3中，在应用程序启动时下载并加载它们

方法 我们能够毫无问题地从S3获取DLL。据我们所知，有3种可能的方式加载DLL。来自S3的对象流被命名为“dll”

（首选）：

（不太有利，但也不错）：

（最不利）：

错误/意外行为 问题是最有利的方法1和2不起作用。应用程序返回一条详细的错误消息（堆栈跟踪在下面找到）。如果我们使用S3中的同一个DLL并将其加载到一个临时位置，则DLL将按预期加载。还值得一提的是，如果DLL已经作为文件存储在本地，转换为流，并试图加载，我们会收到相同的错误。我们做错什么了吗？是否存在我们不知道的限制

ArgumentException: Empty path name is not legal. (Parameter 'path')
System.IO.FileStream..ctor(string path, FileMode mode, FileAccess access, FileShare share, int bufferSize, FileOptions options)
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RazorReferenceManager.CreateMetadataReference(string path)
System.Linq.Enumerable+SelectListIterator<TSource, TResult>.ToList()
System.Linq.Enumerable.ToList<TSource>(IEnumerable<TSource> source)
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RazorReferenceManager.GetCompilationReferences()
System.Threading.LazyInitializer.EnsureInitializedCore<T>(ref T target, ref bool initialized, ref object syncLock, Func<T> valueFactory)
System.Threading.LazyInitializer.EnsureInitialized<T>(ref T target, ref bool initialized, ref object syncLock, Func<T> valueFactory)
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RazorReferenceManager.get_CompilationReferences()
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.LazyMetadataReferenceFeature.get_References()
Microsoft.CodeAnalysis.Razor.CompilationTagHelperFeature.GetDescriptors()
Microsoft.AspNetCore.Razor.Language.DefaultRazorTagHelperBinderPhase.ExecuteCore(RazorCodeDocument codeDocument)
Microsoft.AspNetCore.Razor.Language.RazorEnginePhaseBase.Execute(RazorCodeDocument codeDocument)
Microsoft.AspNetCore.Razor.Language.DefaultRazorEngine.Process(RazorCodeDocument document)
Microsoft.AspNetCore.Razor.Language.DefaultRazorProjectEngine.ProcessCore(RazorCodeDocument codeDocument)
Microsoft.AspNetCore.Razor.Language.RazorProjectEngine.Process(RazorProjectItem projectItem)
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RuntimeViewCompiler.CompileAndEmit(string relativePath)
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RuntimeViewCompiler.OnCacheMiss(string normalizedPath)
Microsoft.AspNetCore.Mvc.Razor.Compilation.DefaultRazorPageFactoryProvider.CreateFactory(string relativePath)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.CreateCacheResult(HashSet<IChangeToken> expirationTokens, string relativePath, bool isMainPage)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.OnCacheMiss(ViewLocationExpanderContext expanderContext, ViewLocationCacheKey cacheKey)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.LocatePageFromViewLocations(ActionContext actionContext, string pageName, bool isMainPage)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.FindView(ActionContext context, string viewName, bool isMainPage)
Microsoft.AspNetCore.Mvc.ViewEngines.CompositeViewEngine.FindView(ActionContext context, string viewName, bool isMainPage)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.FindView(ActionContext actionContext, ViewResult viewResult)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.ExecuteAsync(ActionContext context, ViewResult result)
Microsoft.AspNetCore.Mvc.ViewResult.ExecuteResultAsync(ActionContext context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|29_0<TFilter, TFilterAsync>(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext<TFilter, TFilterAsync>(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke(HttpContext httpContext)
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

ArgumentException:空路径名不合法。（参数“路径”）
System.IO.FileStream..ctor（字符串路径、文件模式、文件访问访问、文件共享、int bufferSize、文件选项）
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RazorReferenceManager.CreateMataReference（字符串路径）
System.Linq.Enumerable+SelectListIterator.ToList（）
System.Linq.Enumerable.ToList（IEnumerable源）
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RazorReferenceManager.GetCompilationReferences（）
System.Threading.LazyInitializer.EnsureInitializedCore（参考T目标、参考布尔初始化、参考对象同步锁、函数值工厂）
System.Threading.LazyInitializer.EnsureInitialized（参考T目标、参考布尔初始化、参考对象同步锁、函数值工厂）
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RazorReferenceManager.get_CompilationReferences（）
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.LazymetadateReferenceFeature.get_References（）
Microsoft.CodeAnalysis.Razor.CompilationTagHelperFeature.GetDescriptors（）
Microsoft.AspNetCore.Razor.Language.DefaultRazorTagHelperBinderPhase.ExecuteCore（RazorCodeDocument代码文档）
Microsoft.AspNetCore.Razor.Language.razorenginegenevasebase.Execute（RazorCodeDocument代码文档）
Microsoft.AspNetCore.Razor.Language.DefaultRazorEngine.Process（RazorCodeDocument文档）
Microsoft.AspNetCore.Razor.Language.DefaultRazorProjectEngine.ProcessCore（RazorCodeDocument codeDocument）
Microsoft.AspNetCore.Razor.Language.RazorProjectEngine.Process（RazorProjectItem projectItem）
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompile.RuntimeViewCompiler.CompileAndimit（字符串相对路径）
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RuntimeViewCompiler.OnCacheMiss（字符串规范化路径）
Microsoft.AspNetCore.Mvc.Razor.Compilation.DefaultRazorPageFactoryProvider.CreateFactory（字符串相对路径）
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.CreateCacheResult（HashSet expirationTokens，string relativePath，bool isMainPage）
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.OnCacheMiss（ViewLocationExpanderContext expanderContext，ViewLocationCacheKey cacheKey）
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.LocatePageFromViewLocations（ActionContext ActionContext，string pageName，bool isMainPage）
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.FindView（ActionContext上下文，字符串viewName，bool isMainPage）
Microsoft.AspNetCore.Mvc.ViewEngines.CompositeViewEngine.FindView（ActionContext上下文，字符串viewName，bool isMainPage）
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.FindView（ActionContext ActionContext，ViewResult ViewResult）
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.ExecuteAsync（ActionContext上下文，ViewResult结果）
Microsoft.AspNetCore.Mvc.ViewResult.ExecuteSultAsync（ActionContext上下文）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g_|29_0（ResourceInvoker invoker，Task lastTask，State next，Scope Scope，object State，bool isCompleted）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow（ResultExecutedContextSealed上下文）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext（ref状态next、ref范围、ref对象状态、ref bool已完成）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters（）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g_|24_0（ResourceInvoker invoker，Task lastTask，State next，Scope Scope，object State，bool isCompleted）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow（ResourceExecutedContextSealed上下文）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next（ref状态Next、ref作用域、ref对象状态、ref bool已完成）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync（）
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g|u Logged|17|u 1（ResourceInvoker invoker）
Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke（HttpContext HttpContext）
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke（HttpContext上下文）
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke（HttpContext上下文）
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke（HttpContext上下文）
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke（HttpContext上下文）

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谢谢你的时间

直接从web运行程序集不是一个好主意。首先，如果S3关闭，则所有应用程序都将关闭。如果S3运行缓慢，则所有应用程序都会缓慢启动。如果您的S3帐户被泄露，则

using (var memoryStream = new MemoryStream())
{
     dll.CopyTo(memoryStream);
     var b =  memoryStream.ToArray();
     var assm = Assembly.Load(b);
     mvcBuilder.AddApplicationPart(assm);
}

using (var fileStream = new FileStream(Environment.CurrentDirectory + "/tmp/Anon.dll", FileMode.Create,FileAccess.Write))
{
     dll.CopyTo(fileStream);
     var assm = Assembly.LoadFile(name);
     mvcBuilder.AddApplicationPart(assm);
}

ArgumentException: Empty path name is not legal. (Parameter 'path')
System.IO.FileStream..ctor(string path, FileMode mode, FileAccess access, FileShare share, int bufferSize, FileOptions options)
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RazorReferenceManager.CreateMetadataReference(string path)
System.Linq.Enumerable+SelectListIterator<TSource, TResult>.ToList()
System.Linq.Enumerable.ToList<TSource>(IEnumerable<TSource> source)
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RazorReferenceManager.GetCompilationReferences()
System.Threading.LazyInitializer.EnsureInitializedCore<T>(ref T target, ref bool initialized, ref object syncLock, Func<T> valueFactory)
System.Threading.LazyInitializer.EnsureInitialized<T>(ref T target, ref bool initialized, ref object syncLock, Func<T> valueFactory)
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RazorReferenceManager.get_CompilationReferences()
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.LazyMetadataReferenceFeature.get_References()
Microsoft.CodeAnalysis.Razor.CompilationTagHelperFeature.GetDescriptors()
Microsoft.AspNetCore.Razor.Language.DefaultRazorTagHelperBinderPhase.ExecuteCore(RazorCodeDocument codeDocument)
Microsoft.AspNetCore.Razor.Language.RazorEnginePhaseBase.Execute(RazorCodeDocument codeDocument)
Microsoft.AspNetCore.Razor.Language.DefaultRazorEngine.Process(RazorCodeDocument document)
Microsoft.AspNetCore.Razor.Language.DefaultRazorProjectEngine.ProcessCore(RazorCodeDocument codeDocument)
Microsoft.AspNetCore.Razor.Language.RazorProjectEngine.Process(RazorProjectItem projectItem)
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RuntimeViewCompiler.CompileAndEmit(string relativePath)
Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.RuntimeViewCompiler.OnCacheMiss(string normalizedPath)
Microsoft.AspNetCore.Mvc.Razor.Compilation.DefaultRazorPageFactoryProvider.CreateFactory(string relativePath)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.CreateCacheResult(HashSet<IChangeToken> expirationTokens, string relativePath, bool isMainPage)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.OnCacheMiss(ViewLocationExpanderContext expanderContext, ViewLocationCacheKey cacheKey)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.LocatePageFromViewLocations(ActionContext actionContext, string pageName, bool isMainPage)
Microsoft.AspNetCore.Mvc.Razor.RazorViewEngine.FindView(ActionContext context, string viewName, bool isMainPage)
Microsoft.AspNetCore.Mvc.ViewEngines.CompositeViewEngine.FindView(ActionContext context, string viewName, bool isMainPage)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.FindView(ActionContext actionContext, ViewResult viewResult)
Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor.ExecuteAsync(ActionContext context, ViewResult result)
Microsoft.AspNetCore.Mvc.ViewResult.ExecuteResultAsync(ActionContext context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|29_0<TFilter, TFilterAsync>(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext<TFilter, TFilterAsync>(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, object state, bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke(HttpContext httpContext)
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)