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using Duplicati.Library.Common.IO;
using Duplicati.Library.Interface;
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace Duplicati.Library.Backend
{
// ReSharper disable once UnusedMember.Global
// This class is instantiated dynamically in the BackendLoader.
public class Dropbox : IBackend, IStreamingBackend
{
private const string AUTHID_OPTION = "authid";
private readonly string m_accesToken;
private readonly string m_path;
private readonly DropboxHelper dbx;
// ReSharper disable once UnusedMember.Global
// This constructor is needed by the BackendLoader.
public Dropbox()
{
}
// ReSharper disable once UnusedMember.Global
// This constructor is needed by the BackendLoader.
public Dropbox(string url, Dictionary<string, string> options)
{
var uri = new Utility.Uri(url);
m_path = Library.Utility.Uri.UrlDecode(uri.HostAndPath);
if (m_path.Length != 0 && !m_path.StartsWith("/", StringComparison.Ordinal))
m_path = "/" + m_path;
if (m_path.EndsWith("/", StringComparison.Ordinal))
m_path = m_path.Substring(0, m_path.Length - 1);
if (options.ContainsKey(AUTHID_OPTION))
m_accesToken = options[AUTHID_OPTION];
dbx = new DropboxHelper(m_accesToken);
}
public void Dispose()
{
// do nothing
}
public string DisplayName
{
get { return Strings.Dropbox.DisplayName; }
}
public string ProtocolKey
{
get { return "dropbox"; }
}
private IFileEntry ParseEntry(MetaData md)
{
var ife = new FileEntry(md.name);
if (md.IsFile)
{
ife.IsFolder = false;
ife.Size = (long)md.size;
}
else
{
ife.IsFolder = true;
}
try { ife.LastModification = ife.LastAccess = DateTime.Parse(md.server_modified).ToUniversalTime(); }
catch { }
return ife;
}
private T HandleListExceptions<T>(Func<T> func)
{
try
{
return func();
}
catch (DropboxException de)
{
if (de.errorJSON["error"][".tag"].ToString() == "path" && de.errorJSON["error"]["path"][".tag"].ToString() == "not_found")
throw new FolderMissingException();
throw;
}
}
public IEnumerable<IFileEntry> List()
{
var lfr = HandleListExceptions(() => dbx.ListFiles(m_path));
foreach (var md in lfr.entries)
yield return ParseEntry(md);
while (lfr.has_more)
{
lfr = HandleListExceptions(() => dbx.ListFilesContinue(lfr.cursor));
foreach (var md in lfr.entries)
yield return ParseEntry(md);
}
}
public async Task PutAsync(string remotename, string filename, CancellationToken cancelToken)
{
using(FileStream fs = File.OpenRead(filename))
await PutAsync(remotename, fs, cancelToken);
}
public void Get(string remotename, string filename)
{
using(FileStream fs = File.Create(filename))
Get(remotename, fs);
}
public void Delete(string remotename)
{
try
{
string path = String.Format("{0}/{1}", m_path, remotename);
dbx.Delete(path);
}
catch (DropboxException)
{
// we can catch some events here and convert them to Duplicati exceptions
throw;
}
}
public IList<ICommandLineArgument> SupportedCommands
{
get
{
return new List<ICommandLineArgument>(new ICommandLineArgument[] {
new CommandLineArgument(AUTHID_OPTION, CommandLineArgument.ArgumentType.Password, Strings.Dropbox.AuthidShort, Strings.Dropbox.AuthidLong(OAuthHelper.OAUTH_LOGIN_URL("dropbox"))),
});
}
}
public string Description { get { return Strings.Dropbox.Description; } }
public string[] DNSName
{
get { return WebApi.Dropbox.Hosts(); }
}
public void Test()
{
this.TestList();
}
public void CreateFolder()
{
try
{
dbx.CreateFolder(m_path);
}
catch (DropboxException de)
{
if (de.errorJSON["error"][".tag"].ToString() == "path" && de.errorJSON["error"]["path"][".tag"].ToString() == "conflict")
throw new FolderAreadyExistedException();
throw;
}
}
public async Task PutAsync(string remotename, Stream stream, CancellationToken cancelToken)
{
try
{
string path = $"{m_path}/{remotename}";
await dbx.UploadFileAsync(path, stream, cancelToken);
}
catch (DropboxException)
{
// we can catch some events here and convert them to Duplicati exceptions
throw;
}
}
public void Get(string remotename, Stream stream)
{
try
{
string path = string.Format("{0}/{1}", m_path, remotename);
dbx.DownloadFile(path, stream);
}
catch (DropboxException)
{
// we can catch some events here and convert them to Duplicati exceptions
throw;
}
}
}
}
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