public async Task UploadFiles(IEnumerable <UploadFile> files, NameValueCollection values)
{
string newLine = Environment.NewLine;
string boundary = $"--{this.Boundary}";
long totalBytes = files.Select(f => new FileInfo(f.FileName).Length).Sum();
long sendBytes = 0;
if (values != null)
{
foreach (string name in values.Keys)
{
await WriteString($"{boundary}{newLine}", Encoding.ASCII);
await WriteString($"Content-Disposition: form-data; name=\"{name}\"{newLine}{newLine}", Encoding.ASCII);
await WriteString($"{values[name]}{newLine}", Encoding.UTF8);
}
}
foreach (UploadFile file in files)
{
await WriteString($"{boundary}{newLine}", Encoding.ASCII);
await WriteString($"Content-Disposition: form-data; name=\"{file.Name}\"; filename=\"{Path.GetFileName(file.FileName)}\"{newLine}", Encoding.UTF8);
await WriteString($"Content-Type: {file.ContentType}{newLine}{newLine}", Encoding.ASCII);
using (var fs = File.OpenRead(file.FileName))
{
byte[] buffer = new byte[4096];
int read = 0;
while ((read = await fs.ReadAsync(buffer, 0, buffer.Length)) > 0)
{
await RequestStream.WriteAsync(buffer, 0, read);
sendBytes += read;
this.OnReport(sendBytes / (double)totalBytes);
}
await WriteString(newLine, Encoding.ASCII);
}
}
await WriteString($"{boundary}--", Encoding.ASCII);
}
private async Task WriteString(string value, Encoding encoding)
{
byte[] buffer = encoding.GetBytes(value);
await RequestStream.WriteAsync(buffer, 0, buffer.Length);
}