FormUrlEncodedContent.cs

Go to the documentation of this file.

using System.Collections.Generic;
using System.IO;
using System.Net.Http.Headers;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
 
namespace System.Net.Http;
 
public class FormUrlEncodedContent : ByteArrayContent
{
    public FormUrlEncodedContent(IEnumerable<KeyValuePair<string, string>> nameValueCollection)
        : base(GetContentByteArray(nameValueCollection))
    {
        base.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded");
    }
 
    private static byte[] GetContentByteArray(IEnumerable<KeyValuePair<string, string>> nameValueCollection)
    {
        if (nameValueCollection == null)
        {
            throw new ArgumentNullException("nameValueCollection");
        }
        StringBuilder stringBuilder = new StringBuilder();
        foreach (KeyValuePair<string, string> item in nameValueCollection)
        {
            if (stringBuilder.Length > 0)
            {
                stringBuilder.Append('&');
            }
            stringBuilder.Append(Encode(item.Key));
            stringBuilder.Append('=');
            stringBuilder.Append(Encode(item.Value));
        }
        return HttpRuleParser.DefaultHttpEncoding.GetBytes(stringBuilder.ToString());
    }
 
    private static string Encode(string data)
    {
        if (string.IsNullOrEmpty(data))
        {
            return string.Empty;
        }
        return Uri.EscapeDataString(data).Replace("%20", "+");
    }
 
    protected override Task SerializeToStreamAsync(Stream stream, TransportContext? context, CancellationToken cancellationToken)
    {
        if (!(GetType() == typeof(FormUrlEncodedContent)))
        {
            return base.SerializeToStreamAsync(stream, context, cancellationToken);
        }
        return SerializeToStreamAsyncCore(stream, cancellationToken);
    }
 
    internal override Stream TryCreateContentReadStream()
    {
        if (!(GetType() == typeof(FormUrlEncodedContent)))
        {
            return null;
        }
        return CreateMemoryStreamForByteArray();
    }
}