Can't send a stream file with httpClient to web api

Question

i tried to send a basic file from my integration test project in C# to a web api . But i don't know why, each call i get an exception .

Json.JsonSerializationException : Error getting value from 'ReadTimeout' on 'System.Io.FileStream'

I found this property can't be read , so maybe that why my httpclient can't serialize it. So how can i send a file to a web api ?

This is my code from the client:

using (StreamReader reader = File.OpenText("SaveMe.xml"))
{
    response = await client.PostAsJsonAsync($"api/registration/test/", reader.BaseStream);
    response.EnsureSuccessStatusCode();
}

And my controller:

[Route("api/registration")]
public class RegistrationController : Controller
{
    [HttpPost, Route("test/")]
        public ActionResult AddDoc(Stream uploadedFile)
        {
            if (uploadedFile != null)
            {
                return this.Ok();
            }
            else
            {
                return this.NotFound();
            }

        }

Here the screenShot we can see , the property [ReadTimeout] can't be access.

I suspect you can't use the `FileStream`. You can also check this: https://stackoverflow.com/questions/10320232/how-to-accept-a-file-post — Subbu, Jul 10 '17 at 13:34
Sorry, but i can't find some help from your your link :-( Is not explain how to send a file with httpCLient , by the way . I update my post. My controller wait for a [Stream] and not a [FileStream] — Mehdi Bugnard, Jul 10 '17 at 13:57
@MehdiBugnard confirm which version of asp.net-mvc you are using. asp.net-core or asp.net-web-api? — Nkosi, Jul 10 '17 at 14:06
Looks to me like you're sending XML and saying it's JSON. That doesn't sound like it would work. — Stephen Cleary, Jul 10 '17 at 14:34
XML file is not the problem, if i change with a text file, it's still not work — Mehdi Bugnard, Jul 11 '17 at 05:02

Felix Too · Accepted Answer · 2017-07-10T14:21:41.863

I'm not sure if they still support PostAsJsonAsync in .NET Core, which I am on. So I decided to rewrite your snippet as follows using PostAsync:

    using (StreamReader reader = File.OpenText("SaveMe.xml"))
    {
    var response = await client.PostAsync($"api/registration/test/", new StreamContent(reader.BaseStream));                                   
    }

Update your API method to look like:

[Route("api/registration")]
public class RegistrationController : Controller
{
    [HttpPost, Route("test/")]
    public ActionResult AddDoc()
    {
        //Get the stream from body
        var stream = Request.Body;
        //Do something with stream
    }

score 0 · Answer 2 · answered Jul 10 '17 at 13:36

0

First you have to read all the data from file and only then send it. To open the .xml files use XmlReader. look here Reading Xml with XmlReader in C#

answered Jul 10 '17 at 13:36

Anton

1

If i try with a (Text File) the problem still remaining – Mehdi Bugnard Jul 10 '17 at 13:39

Can't send a stream file with httpClient to web api

2 Answers2