public static HttpTransfer FromNative(this NSUrlSessionTask task)
{
var upload = task is NSUrlSessionUploadTask;
Exception exception = null;
if (task.Error != null && task.State != NSUrlSessionTaskState.Canceling)
{
exception = new Exception(task.Error.LocalizedDescription);
}
var taskId = TaskIdentifier.FromString(task.TaskDescription);
return(new HttpTransfer(
taskId.Value,
task.OriginalRequest.Url.ToString(),
taskId.File.FullName,
upload,
task.OriginalRequest.AllowsCellularAccess,
exception,
upload
? task.BytesExpectedToSend
: task.BytesExpectedToReceive,
upload
? task.BytesSent
: task.BytesReceived,
task.GetTransferStatus()
));
}
protected override async Task <HttpTransfer> CreateUpload(HttpTransferRequest request)
{
if (request.HttpMethod != System.Net.Http.HttpMethod.Post && request.HttpMethod != System.Net.Http.HttpMethod.Put)
{
throw new ArgumentException($"Invalid Upload HTTP Verb {request.HttpMethod} - only PUT or POST are valid");
}
var boundary = Guid.NewGuid().ToString("N");
var native = request.ToNative();
native["Content-Type"] = $"multipart/form-data; boundary={boundary}";
var tempPath = platform.GetUploadTempFilePath(request);
this.logger.LogInformation("Writing temp form data body to " + tempPath);
using (var fs = new FileStream(tempPath, FileMode.Create))
{
if (!request.PostData.IsEmpty())
{
fs.Write("--" + boundary);
fs.Write($"Content-Type: text/plain; charset=utf-8");
fs.Write("Content-Disposition: form-data;");
fs.WriteLine();
fs.Write(request.PostData !);
fs.WriteLine();
}
}
using (var fs = new FileStream(tempPath, FileMode.Append))
{
using (var uploadFile = request.LocalFile.OpenRead())
{
fs.Write("--" + boundary);
fs.Write($"Content-Type: application/octet-stream");
fs.Write($"Content-Disposition: form-data; name=\"blob\"; filename=\"{request.LocalFile.Name}\"");
fs.WriteLine();
await uploadFile.CopyToAsync(fs);
fs.WriteLine();
fs.Write($"--{boundary}--");
}
}
this.logger.LogInformation("Form body written");
var tempFileUrl = NSUrl.CreateFileUrl(tempPath, null);
var task = this.Session.CreateUploadTask(native, tempFileUrl);
var taskId = TaskIdentifier.Create(request.LocalFile);
task.TaskDescription = taskId.ToString();
var transfer = task.FromNative();
task.Resume();
return(transfer);
}
protected override Task <HttpTransfer> CreateUpload(HttpTransferRequest request)
{
var task = this.Session.CreateUploadTask(request.ToNative());
var taskId = TaskIdentifier.Create(request.LocalFile);
task.TaskDescription = taskId.ToString();
var transfer = task.FromNative();
task.Resume();
return(Task.FromResult(transfer));
}
protected override Task <HttpTransfer> CreateDownload(HttpTransferRequest request)
{
var task = this.Session.CreateDownloadTask(request.ToNative());
var taskId = TaskIdentifier.Create(request.LocalFile);
task.TaskDescription = taskId.ToString();
//task.Response.SuggestedFilename
//task.Response.ExpectedContentLength
var transfer = task.FromNative();
task.Resume();
return(Task.FromResult(transfer));
}
public static HttpTransfer FromNative(this NSUrlSessionTask task)
{
var status = HttpTransferState.Unknown;
var upload = task is NSUrlSessionUploadTask;
Exception?exception = null;
switch (task.State)
{
case NSUrlSessionTaskState.Canceling:
status = HttpTransferState.Canceled;
break;
case NSUrlSessionTaskState.Completed:
status = task.Error?.Code == -999
? HttpTransferState.Canceled
: HttpTransferState.Completed;
break;
case NSUrlSessionTaskState.Suspended:
status = HttpTransferState.Paused;
break;
case NSUrlSessionTaskState.Running:
var bytes = task.BytesSent + task.BytesReceived;
status = bytes == 0 ? HttpTransferState.Pending : HttpTransferState.InProgress;
break;
default:
status = HttpTransferState.Error;
if (task.Error == null)
{
exception = new Exception("Unknown Error");
}
else
{
status = HttpTransferState.Error;
var e = task.Error;
var msg = $"{e.LocalizedDescription} - {e.LocalizedFailureReason}";
exception = new Exception(msg);
}
break;
}
var taskId = TaskIdentifier.FromString(task.TaskDescription);
return(new HttpTransfer(
taskId.Value,
task.OriginalRequest.Url.ToString(),
taskId.File.FullName,
upload,
task.OriginalRequest.AllowsCellularAccess,
exception,
upload
? task.BytesExpectedToSend
: task.BytesExpectedToReceive,
upload
? task.BytesSent
: task.BytesReceived,
status
));
}
