ASP.NET Core API-在Azure App Service上获取404，但在Localhost上可以正常运行 [英] ASP.NET Core API - Get 404 on Azure App Service, but works ok on Localhost
问题描述
我有一个Azure应用服务中托管的ASP.NET Core 2.1应用.在本地执行时，我可以访问控制器.但是，当我在Azure应用程序中托管时，我会收到404.这是重现的最少步骤.
I have an ASP.NET Core 2.1 app that I've hosted in an Azure app service. When executed locally I'm able to access the controller. But when I host in an Azure app I receive a 404. Here are the minimal steps to reproduce.
在Visual Studio 2017中添加一个新项目.选择"ASP.NET Core Web应用程序".选择ASP.NET Core 2.1，API项目模板，不进行身份验证，为HTTPS配置.以自托管的方式运行新应用(不使用IIS).浏览至https://localhost:5001/api/values.我得到了预期的响应(尽管命令行上有一个关于无法验证HTTPS连接的异常).
In Visual Studio 2017 add a new project. Select ASP.NET Core Web Application. Select ASP.NET Core 2.1, API project template, no authentication, configure for HTTPS. Run the new app as a self hosted (not using IIS). Browse to https://localhost:5001/api/values. I get the expected response (although there is an exception on the command line about failure to authenticate HTTPS connection).
右键单击项目，然后选择发布.选择以创建新的应用程序服务.我选择了现有的订阅，托管计划和资源组.我保留了默认的应用程序名称.创建应用.
Right click the project and select publish. Select to create a new app service. I selected my existing subscription, hosting plan, and resource group. I left the default app name. Create the app.
浏览到URL https://app_name.azurewebsites.net ，我看到了默认页面.浏览到 https://appname.azurewebsites.net/api/values ，我得到一个404
Browse to the url https://app_name.azurewebsites.net and I see the default page. Browse to https://appname.azurewebsites.net/api/values and I get a 404.
我确定我错过了一些非常愚蠢的东西，但我只是想不通.
I'm sure I'm missing something quite stupid, but I just can't figure it out.
推荐答案
我能够重现该错误，以下解决方案为我工作.如果您以前没有尝试过，请尝试一下.
I was able to reproduce the error and below solution worked for me. Try this if you haven't tried earlier.
- 在将应用程序发布到Azure之前，请确保将配置设置为发布模式".
-
在ValuesController中的GET方法顶部添加 [Route("/")] 属性，如下所示.
[Route("/")]
[HttpGet("{id}")]
public ActionResult<string> Get(int id)
{
return "value";
}
基本上，任何没有路由属性的控制器方法都使用基于约定的路由.
Basically, Any controller methods that do not have a route attribute use convention-based routing.
使用[Route]属性时，将定义属性路由，因此该操作/控制器不使用常规路由.
When you use [Route] attribute, you define attribute routing and so conventional routing is not used for that action/controller.
作为一种选择，您可以使用以下事实:属性路由可以与继承结合在一起.在整个控制器上设置一个Route属性，它将用作路由前缀(与WebApi中的[RoutePrefix]属性相同的行为):
As an option, you can use the fact, that attribute routes can be combined with inheritance. Set a Route attribute on the entire controller and this will work as route prefix (the same behavior as [RoutePrefix] attribute in WebApi):
[Route("api/[controller]")]
public class ValuesController: ControllerBase
{
}
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