No HTTP resource was found that matches the request URI 'MyUrl'

Question

I created a .Net web service:

public class UsersController : ApiController
{
    [System.Web.Http.HttpPost]
    public void Post(string value)
    {
        SqlConnection connection = new SqlConnection("Data Source=198.71.226.6;Integrated Security=False;User ID=AtallahMaroniteDB;Password=a!m?P@$$123;Database=AtallahPlesk_;Connect Timeout=15;Encrypt=False;Packet Size=4096");


        String query = "INSERT INTO Members(LastName, FirstName, Gender, MobileNumber, EmailAddress, Job, Address) VALUES " +
            "(@LastName, @FirstName, @Gender, @MobileNumber, @EmailAddress, @Job, @Address)";
        SqlCommand command = new SqlCommand(query, connection);
        try
        {
            JavaScriptSerializer json_serializer = new JavaScriptSerializer();
            PersonModel person = json_serializer.Deserialize<PersonModel>(value);

            command.Parameters.Add("@LastName", person.LastName);
            command.Parameters.Add("@FirstName", person.FirstName);
            command.Parameters.Add("@Gender", person.Gender);
            command.Parameters.Add("@MobileNumber", person.MobileNumber);
            command.Parameters.Add("@EmailAddress", person.EmailAddress);
            command.Parameters.Add("@Job", person.Job);
            command.Parameters.Add("@Address", person.Address);

            connection.Open();
            command.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.InnerException.ToString());
        }
    }
}

And the following is my routing config:

RouteTable.Routes.MapHttpRoute(
     name: "MyApi",
     routeTemplate: "api/{controller}/{action}/{value}"
 );

When I am calling this web service from an Android or iOS application, I am getting the following error:

No HTTP resource was found that matches the request URI ' http://www.mytestdomain.com/api/users/post '

Below is the android code:

JSONObject dato = POST(person); // This method converts the Person object to JSONObject

String text = null;
try {
    HttpPost post = new HttpPost("http://www.mytestdomain.com/api/users/post");
    StringEntity entity = new StringEntity(dato.toString());
    entity.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
    post.setEntity(entity);
    HttpResponse response = httpClient.execute(post);
    HttpEntity entityResponse = response.getEntity();
    text = getASCIIContentFromEntity(entityResponse);                   
} catch ( IOException ioe ) {
    ioe.printStackTrace();
}

Please note that when I call this web service from postman, it's posting the data successfully.

Please let me know if you need any further details.

Answer 1

You need to update your route template to make sure that you get a valid match for your request.

Here is what a valid template would look like for your API. Note this is specific to the UsersController as the defaults: has been set to controller = "Users" which will map to the UsersController

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        // Attribute routing.
        config.MapHttpAttributeRoutes();

        // Convention-based routing.

        config.Routes.MapHttpRoute(
            name: "MyApi",
            routeTemplate: "api/users/{action}",
            defaults: new { controller = "Users" }
        );

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

From your code example you are sending the model as json and then trying to manually parse it on the server. You can let the framework parse the model with its model binders based on the Content-Type of the request. This will allow you to update your action to accept the actual object model instead of a string.

public class UsersController : ApiController {

    //eg: POST api/users/post
    [HttpPost]
    public IHttpActionResult Post(PersonModel person) {
        if (person == null) return BadRequest();
        try
        {        
            SqlConnection connection = new SqlConnection("Data Source=198.71.226.6;Integrated Security=False;User ID=AtallahMaroniteDB;Password=a!m?P@$$123;Database=AtallahPlesk_;Connect Timeout=15;Encrypt=False;Packet Size=4096");

            String query = "INSERT INTO Members(LastName, FirstName, Gender, MobileNumber, EmailAddress, Job, Address) VALUES " +
            "(@LastName, @FirstName, @Gender, @MobileNumber, @EmailAddress, @Job, @Address)";
            SqlCommand command = new SqlCommand(query, connection);
            command.Parameters.Add("@LastName", person.LastName);
            command.Parameters.Add("@FirstName", person.FirstName);
            command.Parameters.Add("@Gender", person.Gender);
            command.Parameters.Add("@MobileNumber", person.MobileNumber);
            command.Parameters.Add("@EmailAddress", person.EmailAddress);
            command.Parameters.Add("@Job", person.Job);
            command.Parameters.Add("@Address", person.Address);

            connection.Open();
            command.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.InnerException.ToString());
            return InternalServerError();
        }
        return Ok();
    }
}

You also need to make sure the request sent is correct so you can get a match

Here is a raw example request snippet

POST  /api/users/post HTTP/1.1
Host: http://www.mytestdomain.com
Content-Type: application/json
... 
Content-Length: 163

{"LastName":"Doe","FirstName":"Jane","Gender":"Female","MobileNumber":"+1234567890","EmailAddress":"jane.doe@example.com","Job":"Developer","Address":"My address"}

Try inspecting the requests sent from the mobile to make sure its being sent correctly. Something like Fiddler.