Web api routing fails in asp.net MVC 5

Question

I have a asp.net MVC 5 project with lots of controllers and web apis. The problem is when i want to access one of the api methods, i get No HTTP resource was found that matches the request URI ... error.

I tried every solution in similar posts but i wasn't lucky. This is my RouteConfig file:

public static void Register(HttpConfiguration config)
{
    // Routing configs
    config.MapHttpAttributeRoutes();

    // Files api routs
    config.Routes.MapHttpRoute(
        name: "filesApi_1",
        routeTemplate: "api/{controller}/{action}/{file}",
        defaults: new object[]
        {
            new { controller = "Files", action ="SaveAttachment"}
        }
     );

config.Routes.MapHttpRoute(
    name: "filesApi_2",
    routeTemplate: "api/{controller}/{action}/{fileName}",
    defaults:
        new { controller = "Files", action = "DeleteAttachment" }
    );
}

When i go to htt://localhost:xxxx/api/Files/DeleteAttachment/file_name, i get the error.

My Global.asax.cs is:

protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        GlobalConfiguration.Configure(WebApiConfig.Register); 
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);

        Mapper.Initialize(c=> c.AddProfile<MappingProfile>());
    }

The controller is:

public class FilesController : ApiController
{
    public void SaveAttachment(HttpPostedFileBase file){}
    public void DeleteAttachment(string fileName){}
}

It is very strange that if i add attribute routing for web api actions, they work as expected. For example:

[Route("api/Files/DeleteAttachment/{fileName}")]
public void DeleteAttachment(string fileName){}

I don't want write Route for every action because i have lots of actions and it make the code fragile. How can i fix routing in the route table? Thanks.

Tomas Chabada · Accepted Answer · 2018-06-26 10:00:09Z

Tag your Api controller methods with attributes [HttpGet] or [HttpPost] so the routing mechanism will know when to use each.

public class FilesController : ApiController
{
    [HttpPost]
    public void SaveAttachment(HttpPostedFileBase file){}
    [HttpGet]
    public void DeleteAttachment(string fileName){}
}

----------------------------------------------------------------------------------
And the second issue may be with your default routing values:

config.Routes.MapHttpRoute(
    name: "filesApi_2",
    routeTemplate: "api/{controller}/{action}/{fileName}",
    defaults:
        new { controller = "Files", action = "DeleteAttachment" }
    );

There is fileName parameter missing in default route, so change it to:

config.Routes.MapHttpRoute(
    name: "filesApi_2",
    routeTemplate: "api/{controller}/{action}/{fileName}",
    defaults:
        new { controller = "Files", action = "DeleteAttachment", fileName = "" }
    );

or

config.Routes.MapHttpRoute(
    name: "filesApi_2",
    routeTemplate: "api/{controller}/{action}/{fileName}",
    defaults:
        new { controller = "Files", action = "DeleteAttachment", fileName = RouteParameter.Optional }
    );

----------------------------------------------------------------------------------
Ok, if it is still not working than it is due to file_name containing .. Web api routing doesn't like dot characters in last parameter.

Change your URL from http://localhost:58893/api/files/deleteattachment/file.jpg
to
http://localhost:58893/api/files/deleteattachment/file.jpg/
and you should be able to invoke requested method

Praveen · Accepted Answer · 2018-06-26 07:55:08Z

1

Convention routing follows template based routing that you configure in webApiConfig but Attribute routing is a lot more flexible. I agree that you may not want to write [Route] attribute over every method but later provides a lot of flexibility.

In one of my project, I could use the same controller to have different route APIs serving similar functionality and as asked by UI development team.Refer this article

answered Jun 26, 2018 at 7:55

Praveen

261 silver badge3 bronze badges

Comments

marc_s · Accepted Answer · 2019-02-01 05:10:22Z

1

You have to check the file name. If the file url is coming or the value in filename contain '/' it will split the route and create a new url as

htt://localhost:xxxx/api/Files/DeleteAttachment/file_name_before_slash/file_name_after_slash

It will not match your URL.

Check value in file name part of your code.

------------------- Edit 1 ------------------------------------

The problem may be in filename "file.jpg". The dot (.) in the file name causes the issue refer to this link, more similar questions are available. Also check this one.

try

 <configuration>
     <system.web>
         <httpRuntime relaxedUrlToFileSystemMapping="true"/>

          <!-- ... your other settings ... -->
     </system.web>
 </configuration>

edited Feb 1, 2019 at 5:10

marc_s

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answered Jun 26, 2018 at 7:50

Jinto Jacob

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5 Comments

Ehsan Toghian Over a year ago

when there is not '/' in the file name, i can't reach the action too.

Jinto Jacob Over a year ago

@ehsantoghian can you provide some more details about the error. like complete error message or stack trace.

Ehsan Toghian Over a year ago

The complete error is:

{ "message": "No HTTP resource was found that matches the request URI 'http://localhost:58893/api/files/deleteattachment/file.jpg'.", "messageDetail": "No action was found on the controller 'Files' that matches the request."

Jinto Jacob Over a year ago

@ehsantoghian the problem is in filename "file.jpg" the (.) in the file name causes the issue reffer this link, more similar questions are available. Also check this one

Ehsan Toghian Over a year ago

i fixed the dot (.) in the file name, but for the brevity didn't mentioned that

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