private void setupFileWithMetadata(DropboxFileInfo file, JToken metadata)
{
file.Provider = this;
file.IsReadOnly = false;
file.IsDirectory = (bool)metadata["is_dir"];
file.Size = (long)metadata["bytes"];
string hash = metadata.Value<string>("hash");
if (hash != null) file.Hash = hash;
string path = (string)metadata["path"];
if (path == "/") file.Name = this.Name;
else file.Name = path.Substring(path.LastIndexOf('/') + 1);
}
private void addFile(string[] folders, JToken metadata)
{
DropboxFileInfo currentFile = _root;
for(int i = 1; i < folders.Length; ++i)
{
string name = folders[i];
DFileInfo nextFile;
if (!currentFile.Contents.TryGetValue(name, out nextFile))
{
// There is a guarantee that if file/folder doesn't already exist, metadata for it will
// arrive later. Thus all wrong assumptions made at this step (if any) will be corrected.
nextFile = new DropboxFileInfo() { IsDirectory = true, Parent = currentFile };
currentFile.Contents.Add(name, nextFile);
}
currentFile = (DropboxFileInfo)nextFile;
}
setupFileWithMetadata(currentFile, metadata);
}
public async Task<DFileInfo> CreateFolderAsync(DFileInfo destinationFolder, string name)
{
string nameKey = name.ToLowerInvariant();
if (destinationFolder.Contents.ContainsKey(nameKey))
throw new FileConflictException("Entry with name specified is already present.");
var dParent = (DropboxFileInfo)destinationFolder;
string path = concatenatePath(dParent.Path, name);
var url = new ParamUrl(DropboxConfig.CreateFolderUrl);
url.Add("root", DropboxConfig.AccessType);
url.Add("path", path);
var response = await queryServer(url).ConfigureAwait(false);
var metadata = JObject.Parse(response);
var newFolder = new DropboxFileInfo() { Parent = dParent };
setupFileWithMetadata(newFolder, metadata);
dParent.Contents.Add(nameKey, newFolder);
return newFolder;
}
public async Task<DFileInfo> UploadFileAsync(DFileInfo destinationFolder, string name, Stream stream,
CancellationToken cancellationToken, IProgress<int> progress, long fileSize)
{
var dDestFolder = (DropboxFileInfo)destinationFolder;
string uploadId = null;
using (stream)
{
if (progress != null) progress.Report(0);
var buffer = new byte[DropboxConfig.ChunkSize];
long totalUploaded = 0, offset = 0;
// Some data is read from the buffer until it is full and we
// attempt to push it to the server until it acknowledges all of it.
while (true)
{
int bytesRead = 0, bytesReadThisTime = 0;
while (bytesRead < buffer.Length)
{
bytesReadThisTime =
await stream.ReadAsync(buffer, bytesRead, buffer.Length - bytesRead).ConfigureAwait(false);
bytesRead += bytesReadThisTime;
if (bytesReadThisTime == 0) break;
}
if (bytesRead == 0) break;
int relativeOffset = 0;
// relativeOffset shows how many bytes server already accepted.
while (relativeOffset < bytesRead)
{
cancellationToken.ThrowIfCancellationRequested();
var url = new ParamUrl(DropboxConfig.UploadUrl);
url.Add("offset", (offset + relativeOffset).ToString());
if (uploadId != null) url.Add("upload_id", uploadId);
var signedUrl = await signAsync(url).ConfigureAwait(false);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(signedUrl);
request.Method = WebRequestMethods.Http.Put;
request.ContentLength = bytesRead - relativeOffset;
using (var requestStream = await request.GetRequestStreamAsync().ConfigureAwait(false))
{
requestStream.Write(buffer, relativeOffset, bytesRead - relativeOffset);
}
JToken response;
try
{
var webResponse = await request.GetResponseAsync().ConfigureAwait(false);
StreamReader reader = new StreamReader(webResponse.GetResponseStream());
var jsonResult = reader.ReadToEnd();
reader.Close();
response = JToken.Parse(jsonResult);
}
catch (WebException e)
{
string message = e.ResponseString();
if (e.HttpStatusCode() == 400 && !string.IsNullOrEmpty(message))
{
response = JToken.Parse(message);
}
else throw parseException(e);
}
uploadId = (string)response["upload_id"];
relativeOffset = (int)((long)response["offset"] - offset);
totalUploaded = offset + relativeOffset;
if (progress != null) progress.Report((int)(totalUploaded * 100 / fileSize));
}
offset += bytesRead;
}
}
var baseUrl = new StringBuilder(DropboxConfig.UploadFinishUrl);
baseUrl.Append(DropboxConfig.AccessType);
baseUrl.Append(concatenatePath(dDestFolder.Path, name));
var finalUrl = new ParamUrl(baseUrl.ToString());
finalUrl.Add("upload_id", uploadId);
var finishResponse = await queryServer(finalUrl, WebRequestMethods.Http.Post).ConfigureAwait(false);
DropboxFileInfo file = new DropboxFileInfo() { Parent = destinationFolder };
setupFileWithMetadata(file, JToken.Parse(finishResponse));
destinationFolder.Contents.Add(name.ToLowerInvariant(), file);
return file;
}
private async Task<DFileInfo> copyOperation(DropboxFileInfo file,
DropboxFileInfo destFolder, bool move, string newName = null)
{
string nameKey = file.Name.ToLowerInvariant();
string newNameKey = (newName == null)? nameKey : newName.ToLowerInvariant();
// Storage provider should check possible file conflicts by itself, because
// the outer system doesn't know how to access keys in dictionary correctly.
if (destFolder.Contents.ContainsKey(newNameKey))
throw new FileConflictException("Entry with specified name is already present.");
string path = concatenatePath(destFolder.Path, newName ?? file.Name);
var url = new ParamUrl(move ? DropboxConfig.MoveUrl : DropboxConfig.CopyUrl);
url.Add("root", DropboxConfig.AccessType);
url.Add("from_path", percentEncoding(file.Path));
url.Add("to_path", percentEncoding(path));
var response = await queryServer(url).ConfigureAwait(false);
var metadata = JObject.Parse(response);
if (move)
{
file.Parent.Contents.Remove(nameKey);
file.Parent = destFolder;
setupFileWithMetadata(file, metadata);
destFolder.Contents.Add(newNameKey, file);
return file;
}
else
{
var newFile = (DropboxFileInfo)file.Clone();
newFile.Parent = destFolder;
setupFileWithMetadata(newFile, metadata);
destFolder.Contents.Add(newNameKey, newFile);
return newFile;
}
}