Establishing Routing for Angular within an ASP.NET Web API 2 application

Currently, I am facing difficulties in setting up the routing for my project. There are several cases that need to be handled, but I am struggling to make them work as intended.
case 1: / - Should route to the index of the angular app
Case 2: /{angular Route} - Should route to Angular's routing, but I believe it needs to be redirected to the angular base page first.
Case 3: /api/data/GetAllValues - Should route to the data API controller method and the GetAllValues action
The base file for Angular is stored at the root: /index.html, and when you visit this page, Angular will take you to /Index

This is the routing setup I have in WebApiConfig.Register, which is invoked by Global.asax

config.MapHttpAttributeRoutes();

config.Routes.MapHttpRoute(
    name: "DefaultActionApi",
    routeTemplate: "api/{controller}/{action}/{id}",
    defaults: new { id = RouteParameter.Optional });

config.Routes.MapHttpRoute("AngularRedirect", "{.*}", "~/index.html");

config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));

And here are the Angular routes

.config(function($routeProvider, $locationProvider) {
    $routeProvider.when('/Index',
        {
            templateUrl: 'Templates/Feed.html',
            controller: 'feedController'
        }
    );
    $routeProvider.when('/Lookup',
        {
            templateUrl: 'Templates/Lookup.html',
            controller: 'lookupController'
        }
    );

   $locationProvider.html5Mode(true);

   $routeProvider.otherwise({ redirectTo: '/Index' });

I am encountering some issues with this setup. Neither case 1 nor case 2 are working; both result in a message from ASP.NET stating that it cannot match a URL to the request.
Edit: This is the error message I receive when I try to navigate to / (case 1)

{"Message":"No HTTP resource was found that matches the request URI 'http://localhost:49569/'.","MessageDetail":"No route providing a controller name was found to match request URI 'http://localhost:49569/'"}

Update:
I modified the ASP.NET default route to catch {.*}, and now when I enter /, it correctly redirects to Angular. However, when I input /Index, I still encounter the same error as below

{"Message":"No HTTP resource was found that matches the request URI 'http://localhost:49569/Index'.","MessageDetail":"No route providing a controller name was found to match request URI 'http://localhost:49569/Index'"}

Answer №1

It seems like the issue may lie in the misconfiguration of local redirections. When you type /Index in your browser, the request is not being directed to your base URL, causing it to hit WebAPI instead of Angular.

To resolve this, you can add the following configuration to your web application's web.config file:

<system.webServer>
    <rewrite>
      <rules>
        <rule name="AngularJS" stopProcessing="true">
          <match url=".*" />
          <conditions logicalGrouping="MatchAll">
            <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
            <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
            <add input="{REQUEST_URI}" pattern="^/(api)" negate="true" />
          </conditions>
          <action type="Rewrite" url="/" />
        </rule>
      </rules>
    </rewrite>
  </system.webServer>

Additionally, make sure to set base in your index.html file within the head section as shown below:

<base href="/" />

Answer №2

After setting up a web api 2 project, I noticed an issue with the MVC RouteConfig.cs file that was created as well. It seems to interfere with routing and prevent index.html from being the default page for starting angularjs. The presence of a route in RouteConfig.cs aimed at the help pages causes confusion, leading the app to redirect to that route on IIS instead of serving index.html as the default page.

To address this issue, removing RouteConfig.cs was the solution to make index.html accessible from IIS. However, I am still figuring out how to properly route the help pages in this scenario.

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