Cannot read body data from web api POST

Question

I'm trying to extract some data out of a request in the new Asp.Net Web Api. I have a handler setup like this:

public class MyTestHandler : DelegatingHandler
{
    protected override System.Threading.Tasks.Task SendAsync(HttpRequestMessage request, System.Threading.CancellationToken cancellationToken)
    {
        if (request.Content.IsFormData())
        {
            request.Content.ReadAsStreamAsync().ContinueWith(x => {
                var result = "";
                using (var sr = new StreamReader(x.Result))
                {
                    result = sr.ReadToEnd();
                }
                Console.Write(result);
            });
        }

        return base.SendAsync(request, cancellationToken);
    }
}

This is my http request:

POST http://127.0.0.1/test HTTP/1.1
Connection: Keep-Alive
Content-Length: 29
Content-Type: application/x-www-form-urlencoded
Expect: 100-continue
Host: 127.0.0.1

my_property=my_value

the problem is that no matter how I try to read the info from request.Content it's always empty. I've tried

request.Content.ReadAsStreamAsync
request.Content.ReadAsFormDataAsync
request.Content.ReadAs

as well as

    [HttpGet,HttpPost]
    public string Index([FromBody]string my_property)
    {
        //my_property == null
        return "Test";
    }

None if it works. I cannot get the data out of the body. I'm hosting inside IIS on Windows 7 and using Fiddler to submit the request. What am I doing wrong?

user_1297134 · Answer

I based my answer on brmore's code;

This function can safe read content in any handler

private string SafeReadContentFrom(HttpRequestMessage request)
{
     var contentType = request.Content.Headers.ContentType;
     var contentInString = request.Content.ReadAsStringAsync().Result;
     request.Content = new StringContent(contentInString);
     request.Content.Headers.ContentType = contentType;
     return contentInString;
}

Cannot read body data from web api POST

6 Answers