void TryDeleteUploadTempFile(HttpTransfer transfer)
{
if (!transfer.IsUpload)
{
return;
}
var path = this.platform.GetUploadTempFilePath(transfer);
if (File.Exists(path))
{
try
{
this.logger.LogDebug($"Deleting temporary upload file - {transfer.Identifier}");
// sometimes iOS will hold a file lock a bit longer than it should
File.Delete(path);
this.logger.LogDebug($"Temporary upload file deleted - {transfer.Identifier}");
}
catch (Exception ex)
{
this.logger.LogWarning($"Unable to delete temporary upload file - {transfer.Identifier}", ex);
}
}
}
protected virtual async Task HandleError(HttpTransfer transfer, NSError error)
{
this.logger.LogError(transfer.Exception, "Error with HTTP transfer: " + transfer.Identifier);
await this.shinyDelegates.Value.RunDelegates(
x => x.OnError(transfer, transfer.Exception)
);
}
static MetricHolder Get(HttpTransfer transfer, Dictionary <string, MetricHolder> metrics)
{
if (!metrics.ContainsKey(transfer.Identifier))
{
metrics.Add(transfer.Identifier, new MetricHolder
{
LastBytesTransferred = transfer.BytesTransferred,
LastPing = DateTime.UtcNow
});
}
return(metrics[transfer.Identifier]);
}
static HttpTransferMetric Calculate(HttpTransfer transfer, IDictionary <string, MetricHolder> metrics)
{
var holder = metrics[transfer.Identifier];
var elapsed = DateTime.UtcNow - holder.LastPing;
var totalSeconds = (long)elapsed.TotalSeconds;
var xferDiff = transfer.BytesTransferred - holder.LastBytesTransferred;
var bytesPerSecond = xferDiff / totalSeconds;
var rawEta = (transfer.FileSize - transfer.BytesTransferred) / bytesPerSecond;
var metric = new HttpTransferMetric(transfer, bytesPerSecond, TimeSpan.FromSeconds(rawEta));
holder.LastPing = DateTime.UtcNow;
holder.LastBytesTransferred = transfer.BytesTransferred;
return(metric);
}
async Task <HttpTransfer> Create(HttpTransferRequest request)
{
var id = Guid.NewGuid().ToString();
await this.Services
.Repository
.Set(id, new HttpTransferStore
{
Id = id,
Uri = request.Uri,
IsUpload = request.IsUpload,
PostData = request.PostData,
LocalFile = request.LocalFile.FullName,
UseMeteredConnection = request.UseMeteredConnection,
HttpMethod = request.HttpMethod.ToString(),
Headers = request.Headers
})
.ConfigureAwait(false);
await this.jobManager.Register(new JobInfo(typeof(TransferJob), id)
{
RequiredInternetAccess = InternetAccess.Any,
Repeat = true
});
var transfer = new HttpTransfer(
id,
request.Uri,
request.LocalFile.FullName,
request.IsUpload,
request.UseMeteredConnection,
null,
request.IsUpload ? request.LocalFile.Length : 0L,
0,
HttpTransferState.Pending
);
// fire and forget
this.jobManager.Run(id);
return(transfer);
}
// TODO: pause due to network
async Task <HttpTransfer> Upload(HttpTransferStore request, CancellationToken ct)
{
var file = new FileInfo(request.LocalFile);
var status = HttpTransferState.Pending;
var bytesTransferred = 0L;
Exception exception = null;
HttpTransfer lastTransfer = default;
// and not cancelled or error
while (!status.IsCompleted() && !ct.IsCancellationRequested)
{
try
{
var content = new MultipartFormDataContent();
content.Add(
new ProgressStreamContent(
file.OpenRead(),
8192,
sent =>
{
status = HttpTransferState.InProgress;
bytesTransferred += sent;
lastTransfer = new HttpTransfer(
request.Id,
request.Uri,
request.LocalFile,
true,
request.UseMeteredConnection,
null,
file.Length,
bytesTransferred,
status
);
this.messageBus.Publish(lastTransfer);
}
),
"blob",
file.Name
);
var message = this.Build(request);
await this.httpClient
.SendAsync(message, ct)
.ConfigureAwait(false);
status = HttpTransferState.Completed;
}
catch (TimeoutException)
{
status = HttpTransferState.Retrying;
}
catch (IOException ex)
{
if (ex.InnerException is WebException)
{
status = HttpTransferState.Retrying;
}
else
{
exception = ex;
status = HttpTransferState.Error;
}
}
//Java.Net.ProtocolException
catch (WebException ex)
{
switch (ex.Status)
{
case WebExceptionStatus.ConnectFailure:
case WebExceptionStatus.Timeout:
status = HttpTransferState.Retrying;
break;
default:
status = HttpTransferState.Error;
exception = ex;
break;
}
}
catch (TaskCanceledException)
{
status = ct.IsCancellationRequested
? HttpTransferState.Canceled
: HttpTransferState.Retrying;
}
catch (Exception ex)
{
exception = ex;
status = HttpTransferState.Error;
}
lastTransfer = new HttpTransfer(
request.Id,
request.Uri,
request.LocalFile,
true,
request.UseMeteredConnection,
exception,
file.Length,
bytesTransferred,
status
);
this.messageBus.Publish(lastTransfer);
}
return(lastTransfer);
}
async Task <HttpTransfer> Download(HttpTransferStore request, CancellationToken ct)
{
HttpTransfer lastTransfer = default;
var status = HttpTransferState.Pending;
var file = new FileInfo(request.LocalFile);
var message = this.Build(request);
var fileSize = 0L;
var bytesTransferred = file.Exists ? file.Length : 0;
Exception exception = null;
var fileMode = file.Exists ? FileMode.Append : FileMode.Create;
using (var fs = file.Open(fileMode, FileAccess.Write, FileShare.Write))
{
while (!status.IsCompleted() && !ct.IsCancellationRequested)
{
try
{
if (fs.Length > 0)
{
var resumeOffset = fs.Length + 1;
message.Headers.Range = new RangeHeaderValue(resumeOffset, null);
}
var buffer = new byte[65535];
var response = await this.httpClient
.SendAsync(
message,
HttpCompletionOption.ResponseHeadersRead,
ct
)
.ConfigureAwait(false);
response.EnsureSuccessStatusCode();
var inputStream = await response
.Content
.ReadAsStreamAsync()
.ConfigureAwait(false);
var read = inputStream.Read(buffer, 0, buffer.Length);
// status code 206 means restart
if (response.Headers.AcceptRanges == null && fs.Length > 0)
{
// resume not supported, starting over
fs.SetLength(0);
fs.Flush();
bytesTransferred = 0;
}
var i = 0;
while (read > 0 && !ct.IsCancellationRequested)
{
fileSize = response.Content.Headers?.ContentRange?.Length ?? response.Content?.Headers?.ContentLength ?? 0;
//this.RemoteFileName = response.Content?.Headers?.ContentDisposition?.FileName ?? String.Empty;
////pr.FileSize = response.Content?.Headers?.ContentLength ?? 0; // this will change on resume
bytesTransferred += read;
fs.Write(buffer, 0, read);
fs.Flush();
i++;
if (i % 4 == 0)
{
lastTransfer = new HttpTransfer(
request.Id,
request.Uri,
request.LocalFile,
false,
request.UseMeteredConnection,
null,
fileSize,
bytesTransferred,
HttpTransferState.InProgress
);
this.messageBus.Publish(lastTransfer);
}
read = inputStream.Read(buffer, 0, buffer.Length);
}
status = HttpTransferState.Completed;
}
catch (TaskCanceledException)
{
status = ct.IsCancellationRequested
? HttpTransferState.Canceled
: HttpTransferState.Retrying;
}
catch (IOException ex)
{
if (ex.InnerException is WebException)
{
status = HttpTransferState.Retrying;
}
else
{
exception = ex;
status = HttpTransferState.Error;
}
}
catch (Exception ex)
{
exception = ex;
status = HttpTransferState.Error;
}
lastTransfer = new HttpTransfer(
request.Id,
request.Uri,
request.LocalFile,
true,
request.UseMeteredConnection,
exception,
fileSize,
bytesTransferred,
status
);
this.messageBus.Publish(lastTransfer);
}
}
return(lastTransfer);
}
public static string GetUploadTempFilePath(this IPlatform platform, HttpTransfer transfer) => GetUploadTempFilePath(platform, transfer.LocalFilePath);
public HttpTransferMetric(HttpTransfer transfer) : this(transfer, 0, TimeSpan.Zero)
{
}
public HttpTransferMetric(HttpTransfer transfer, long bytesPerSecond, TimeSpan estimatedTimeRemaining)
{
this.Transfer = transfer;
this.BytesPerSecond = bytesPerSecond;
this.EstimatedTimeRemaining = estimatedTimeRemaining;
}