HttpClient with BaseAddress

Question

I have a problem calling a webHttpBinding WCF end point using HttpClient and the BaseAddress property.

HttpClient

I created a HttpClient instance specifying the BaseAddress property as a local host endpoint.

GetAsync Call

I then call the GetAsync method passing in the additional Uri inforamtion.

HttpResponseMessage response = await client.GetAsync(string.Format("/Layouts/{0}", machineInformation.LocalMachineName())); 

Service endpoint

[OperationContract] [WebGet(UriTemplate = "/Layouts/{machineAssetName}", ResponseFormat = WebMessageFormat.Json)] List<LayoutsDto> GetLayouts(string machineAssetName); 

Problem

The problem I am having is that the is that /AndonService.svc part of the BaseAddress is being truncated so the resultant call goes to https://localhost:44302/Layouts/1100-00277 rather that https://localhost:44302/AndonService.svc/Layouts/1100-00277 resulting in a 404 Not Found.

Is there a reason the BaseAddress is being truncated in the GetAsync call? How do I get around this?

Answer 1

In the BaseAddress, just include the final slash: https://localhost:44302/AndonService.svc/. If you don't, the final part of the path is discarded, because it's not considered to be a "directory".

This sample code illustrates the difference:

// No final slash var baseUri = new Uri("https://localhost:44302/AndonService.svc"); var uri = new Uri(baseUri, "Layouts/1100-00277"); Console.WriteLine(uri); // Prints "https://localhost:44302/Layouts/1100-00277"   // With final slash var baseUri = new Uri("https://localhost:44302/AndonService.svc/"); var uri = new Uri(baseUri, "Layouts/1100-00277"); Console.WriteLine(uri); // Prints "https://localhost:44302/AndonService.svc/Layouts/1100-00277"