How to do multiple POST actions on single resource

Question

User-209105085 posted

I have ASP.NET Web API application. I have resource on which i want to do 3 different operations using POST. So the URL should like this

http://api.example.com/v1/client/1234/account?sync

http://api.example.com/v1/client/1234/account?transform

http://api.example.com/v1/client/1234/account?upload

1234 is the clientid, All these action methods must be POST. I would like actions like `sync`, `transform` and `upload` to be query string instead of part of the URL ( for example i do not want http://api.example.com/client/1234/account/sync)

below is my controller ( not working)

[RoutePrefix("v1")]
	public class AccountController : ApiController
    {
        private readonly AccountService _service;

        public AccountController(AccountService service)
        {
            _service = service;
        } 
		
		[HttpPost]
        [Route("client/{clientid:int}/account/{upload}")]
        public async Task Upload([FromUri]int clientid, [FromBody]UploadRequest request)
        {
            //do something here
        }

        [HttpPost]
        [Route("client/{clientid:int}/account/{sync}")]
        public async Task<IEnumerable<AccountDTO>> Sync([FromUri]int clientID, [FromBody]IEnumerable<AccountDTO> items)
        {
            //do something here
        }

        [HttpPost]
        [Route("client/{clientid:int}/account/{transform}")]
        public async Task<IEnumerable<AccountDTO>> Transform([FromUri]int clientID, [FromBody] IEnumerable<AccountDTO> items)
        {
            //do something here
        }       
    }

I am getting error `Multiple actions were found that match the request:` 

How would i structure controller here do i get desired route?

Answer 1

User753101303 posted

Hi,

See https://docs.microsoft.com/en-us/aspnet/web-api/overview/web-api-routing-and-actions/routing-in-aspnet-web-api#routing-variations and scroll down to "Routing by Action Name".

The route template can include an {action} placeholder which is then used to select the matching action.

Answer 2

User-474980206 posted

your required url syntax is not valid. a query string parameter should have a value

   ?param=value

or if no value:

   ?param=

you might use

   ?action=sync
   ?action=transform
   ?action=upload

with this you use a route constraint

anyway if you need to use your non-standard format you will need to write your own custom route constraint