MultipartFormDataContent.cs

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using System.IO;
using System.Net.Http.Headers;
using System.Threading;
using System.Threading.Tasks;
 
namespace System.Net.Http;
 
public class MultipartFormDataContent : MultipartContent
{
    public MultipartFormDataContent()
        : base("form-data")
    {
    }
 
    public MultipartFormDataContent(string boundary)
        : base("form-data", boundary)
    {
    }
 
    public override void Add(HttpContent content)
    {
        if (content == null)
        {
            throw new ArgumentNullException("content");
        }
        if (content.Headers.ContentDisposition == null)
        {
            content.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data");
        }
        base.Add(content);
    }
 
    public void Add(HttpContent content, string name)
    {
        if (content == null)
        {
            throw new ArgumentNullException("content");
        }
        if (string.IsNullOrWhiteSpace(name))
        {
            throw new ArgumentException(System.SR.net_http_argument_empty_string, "name");
        }
        AddInternal(content, name, null);
    }
 
    public void Add(HttpContent content, string name, string fileName)
    {
        if (content == null)
        {
            throw new ArgumentNullException("content");
        }
        if (string.IsNullOrWhiteSpace(name))
        {
            throw new ArgumentException(System.SR.net_http_argument_empty_string, "name");
        }
        if (string.IsNullOrWhiteSpace(fileName))
        {
            throw new ArgumentException(System.SR.net_http_argument_empty_string, "fileName");
        }
        AddInternal(content, name, fileName);
    }
 
    private void AddInternal(HttpContent content, string name, string fileName)
    {
        if (content.Headers.ContentDisposition == null)
        {
            ContentDispositionHeaderValue contentDispositionHeaderValue = new ContentDispositionHeaderValue("form-data");
            contentDispositionHeaderValue.Name = name;
            contentDispositionHeaderValue.FileName = fileName;
            contentDispositionHeaderValue.FileNameStar = fileName;
            content.Headers.ContentDisposition = contentDispositionHeaderValue;
        }
        base.Add(content);
    }
 
    protected override Task SerializeToStreamAsync(Stream stream, TransportContext? context, CancellationToken cancellationToken)
    {
        if (!(GetType() == typeof(MultipartFormDataContent)))
        {
            return base.SerializeToStreamAsync(stream, context, cancellationToken);
        }
        return SerializeToStreamAsyncCore(stream, context, cancellationToken);
    }
}