public async Task UpdateFile(FileModel file, Stream content)
{
var filePath = GetFilePath(file);
Directory.CreateDirectory(Path.GetDirectoryName(filePath));
using (var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Write))
await content.CopyToAsync(fileStream);
}
public Task DeleteFile(File file)
{
if (!fileToContentMap.Remove(file))
{
throw new InvalidOperationException("File to remove not found.");
}
return(Task.CompletedTask);
}
public Task <Stream> ReadFile(File file)
{
if (!fileToContentMap.TryGetValue(file, out Stream content))
{
throw new InvalidOperationException("File to read not found.");
}
return(Task.FromResult(content));
}
public Task SaveFile(File file, Stream content)
{
if (!fileToContentMap.TryAdd(file, content))
{
throw new InvalidOperationException("The file already exists.");
}
return(Task.CompletedTask);
}
public Task UpdateFile(File file, Stream content)
{
if (!fileToContentMap.TryGetValue(file, out _))
{
throw new InvalidOperationException("File to update not found.");
}
fileToContentMap[file] = content;
return(Task.CompletedTask);
}
public Task DeleteFile(FileModel file)
{
var filePath = Path.Combine(rootPath, EscapeName(file.Owner.Username), EscapeName(file.FileName));
File.Delete(filePath);
// clear the parent directory if it's empty after deleting the file
DeleteParentDirectoryIfEmpty(filePath);
return(Task.CompletedTask);
}
public Task <Stream> ReadFile(FileModel file)
{
try
{
var filePath = GetFilePath(file);
return(ReadFile(filePath));
}
catch (FileNotFoundException ex)
{
throw new NotFoundException($"A file with id {file.Id} was not found in the storage.", ex);
}
catch (Exception ex) when(ex is UnauthorizedAccessException || ex is IOException)
{
throw new StorageAccessException("An error occured during accessing the file storage", ex);
}
}
public static async Task <FileService.Model.File> StreamFile(this HttpRequest request, string Id, string FilePath)
{
if (!MultipartRequestHelper.IsMultipartContentType(request.ContentType))
{
throw new Exception($"Expected a multipart request, but got {request.ContentType}");
}
// Used to accumulate all the form url encoded key value pairs in the
// request.
var formAccumulator = new KeyValueAccumulator();
var boundary = MultipartRequestHelper.GetBoundary(
MediaTypeHeaderValue.Parse(request.ContentType),
_defaultFormOptions.MultipartBoundaryLengthLimit);
var reader = new MultipartReader(boundary, request.Body);
var section = await reader.ReadNextSectionAsync();
FileService.Model.File FileInstance = new FileService.Model.File();
while (section != null)
{
ContentDispositionHeaderValue contentDisposition;
var hasContentDispositionHeader = ContentDispositionHeaderValue.TryParse(section.ContentDisposition, out contentDisposition);
if (hasContentDispositionHeader)
{
if (MultipartRequestHelper.HasFileContentDisposition(contentDisposition))
{
var FileName = contentDisposition.FileName.Value;
var FileNameSegments = FileName.Replace("\"", "").Replace("'", "").Split(".");
FilePath = FilePath + "." + FileNameSegments[FileNameSegments.Length - 1];
FileInstance.Name = FileName.Replace("\"", "").Replace("'", "");
FileInstance.Note = "";
FileInstance.Location = FilePath;
FileInstance.UserId = Id;
using (var targetStream = File.Create(FilePath))
{
await section.Body.CopyToAsync(targetStream);
}
}
else if (MultipartRequestHelper.HasFormDataContentDisposition(contentDisposition))
{
// Content-Disposition: form-data; name="key"
//
// value
// Do not limit the key name length here because the
// multipart headers length limit is already in effect.
var key = HeaderUtilities.RemoveQuotes(contentDisposition.Name);
var encoding = GetEncoding(section);
using (var streamReader = new StreamReader(
section.Body,
encoding,
detectEncodingFromByteOrderMarks: true,
bufferSize: 1024,
leaveOpen: true))
{
// The value length limit is enforced by MultipartBodyLengthLimit
var value = await streamReader.ReadToEndAsync();
if (String.Equals(value, "undefined", StringComparison.OrdinalIgnoreCase))
{
value = String.Empty;
}
formAccumulator.Append(key.Value, value); // For .NET Core <2.0 remove ".Value" from key
if (formAccumulator.ValueCount > _defaultFormOptions.ValueCountLimit)
{
throw new InvalidDataException($"Form key count limit {_defaultFormOptions.ValueCountLimit} exceeded.");
}
}
}
}
// Drains any remaining section body that has not been consumed and
// reads the headers for the next section.
section = await reader.ReadNextSectionAsync();
}
// Bind form data to a model
var formValueProvider = new FormValueProvider(
BindingSource.Form,
new FormCollection(formAccumulator.GetResults()),
CultureInfo.CurrentCulture);
return(FileInstance);
}
public async Task DeleteFile(File file)
{
using (fileLockingService.CreateLock(file, currentUser.ToDomainUser()))
await decorated.DeleteFile(file);
}
public async Task <Stream> ReadFile(File file)
{
return(await decorated.ReadFile(file));
}
public async Task UpdateFile(File file, Stream content)
{
using (fileLockingService.CreateLock(file, currentUser.ToDomainUser()))
await decorated.UpdateFile(file, content);
}
public async Task SaveFile(File file, Stream content)
{
await decorated.SaveFile(file, content);
}
private string GetFilePath(FileModel file)
{
return(Path.Combine(rootPath, EscapeName(file.Owner.Username), EscapeName(file.FileName)));
}
public bool Exists(File file)
{
return(fileToContentMap.ContainsKey(file));
}