HttpClient POST to WCF returns 400 Bad Request
I don't know if it make sense but the answer is my string content is not properly formatted. I have changed the request using Newtonsoft.Json and now it works:
using (HttpClient client = new HttpClient())
{
var request = new StringContent(
JsonConvert.SerializeObject(this.view.Message),
Encoding.UTF8,
"application/json");
var response = client.PostAsync(
new Uri("http://localhost:8080/Publisher/Send"),
request);
var result = response.Result;
view.Message = result.ToString();
}
Raffaeu
I am Raffaeu (Raffaele Garofalo), Software Architect and passionate about Software Development and Architecture in general.
Updated on June 07, 2022Comments
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Raffaeu almost 2 years
I have a WCF Service self-hosted which exposes a Web POST method with the following signature:
[ServiceContract] public interface IPublisherService { [OperationContract] [WebInvoke(UriTemplate = "Send", Method = "POST")] void SendMessage(string message); }
If I send a request using Fiddler with the following structure (http://localhost:8080/Publisher/Send):
WCF returns 200 OK with the response correctly deserialized into JSON:
But when I try to use HttpClient from a C# Console Application, I always get back a 400 Bad Request without any reason. This is the request:
using (HttpClient client = new HttpClient()) { var content = new StringContent(this.view.Message); content.Headers.ContentType = new MediaTypeHeaderValue("Application/Json"); var response = client.PostAsync( new Uri("http://localhost:8080/Publisher/Send"), content); var result = response.Result; this.view.Message = result.ToString(); }
And the response is always 400, doesn't matter if I use client.PostAsync or clint.SendAsync.
StatusCode: 400, ReasonPhrase: 'Bad Request', Version: 1.1, Content: System.Net.Http.StreamContent, Headers: { Date: Tue, 29 Dec 2015 12:41:55 GMT Server: Microsoft-HTTPAPI/2.0 Content-Length: 1647 Content-Type: text/html }