How to change the encoding of the HttpClient respo

Question

I'm trying to learn about Async programming using VS2012 and its Async Await keyword. That is why i wrote this piece of code:

protected override async void OnNavigatedTo(NavigationEventArgs e)
{
    string get = await GetResultsAsync("http://saskir.medinet.se");

    resultsTextBox.Text = get;
}

private async Task<string> GetResultsAsync(string uri)
{
    HttpClient client = new HttpClient();

    return await client.GetStringAsync(uri);
}

The problem is that when i try to debug the application, it gives me an error with this message:

The character set provided in ContentType is invalid. Cannot read content as string using an invalid character set.

I guess this is because the website have some Swedish char, but i can't find how to change the encoding of the response. Anyone can guide me plz?

Answer 1

WinRT 8.1 C#

using Windows.Storage.Streams;
using System.Text;
using Windows.Web.Http;

// in some async function

Uri uri = new Uri("http://something" + query);
HttpClient httpClient = new HttpClient();

IBuffer buffer = await httpClient.GetBufferAsync(uri);
string response = Encoding.UTF8.GetString(buffer.ToArray(), 0, (int)(buffer.Length- 1));

// parse here

httpClient.Dispose();

Answer 2

In case you want a more generic method, following works in my UWP case in case someone has one with Unicode, would be great add the if:

var response = await httpclient.GetAsync(urisource);

if (checkencoding)
{
    var contenttype = response.Content.Headers.First(h => h.Key.Equals("Content-Type"));
    var rawencoding = contenttype.Value.First();

    if (rawencoding.Contains("utf8") || rawencoding.Contains("UTF-8"))
    {
        var bytes = await response.Content.ReadAsByteArrayAsync();
        return Encoding.UTF8.GetString(bytes);
    }
}

Answer 3

You may have to check the encoding options and get the correct one. Otherwise, this code should get you going with the response.

private async Task<string> GetResultsAsync(string uri)
{
    var client = new HttpClient();
    var response = await client.GetByteArrayAsync(uri);
    var responseString = Encoding.Unicode.GetString(response, 0, response.Length - 1);
    return responseString;
}