330 lines
13 KiB
C#
330 lines
13 KiB
C#
// Copyright (C) 2024, The Duplicati Team
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// https://duplicati.com, hello@duplicati.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using Duplicati.Library.Common.IO;
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using Duplicati.Library.Interface;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Linq;
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using System;
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using System.Collections.Generic;
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using System.Net;
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using System.Threading;
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using System.Threading.Tasks;
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namespace Duplicati.Library.Backend
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{
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public class TahoeBackend : IBackend, IStreamingBackend
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{
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private readonly string m_url;
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private readonly bool m_useSSL = false;
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private readonly byte[] m_copybuffer = new byte[Duplicati.Library.Utility.Utility.DEFAULT_BUFFER_SIZE];
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private class TahoeEl
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{
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public string nodetype { get; set; }
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public TahoeNode node { get; set; }
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}
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private class TahoeNode
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{
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public string rw_uri { get; set; }
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public string verify_uri { get; set; }
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public string ro_uri { get; set; }
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public Dictionary<string, TahoeEl> children { get; set; }
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public bool mutable { get; set; }
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public long size { get; set; }
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public TahoeMetadata metadata { get; set; }
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}
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private class TahoeMetadata
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{
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public TahoeStamps tahoe { get; set; }
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}
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private class TahoeStamps
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{
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public double linkmotime { get; set; }
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public double linkcrtime { get; set; }
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}
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private class TahoeElConverter : JsonConverter
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{
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public override bool CanConvert(Type objectType)
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{
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return objectType == typeof(TahoeEl);
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}
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public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
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{
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var array = JArray.Load(reader);
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string nodetype = null;
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TahoeNode node = null;
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foreach (var token in array.Children())
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if (token.Type == JTokenType.String)
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nodetype = token.ToString();
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else if (token.Type == JTokenType.Object)
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node = token.ToObject<TahoeNode>(serializer);
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return new TahoeEl() { nodetype = nodetype, node = node };
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}
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public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
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{
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throw new NotImplementedException();
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}
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}
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public TahoeBackend()
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{
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}
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public TahoeBackend(string url, Dictionary<string, string> options)
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{
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//Validate URL
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var u = new Utility.Uri(url);
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u.RequireHost();
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if (!u.Path.StartsWith("uri/URI:DIR2:", StringComparison.Ordinal) && !u.Path.StartsWith("uri/URI%3ADIR2%3A", StringComparison.Ordinal))
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throw new UserInformationException(Strings.TahoeBackend.UnrecognizedUriError, "TahoeInvalidUri");
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m_useSSL = Utility.Utility.ParseBoolOption(options, "use-ssl");
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m_url = u.SetScheme(m_useSSL ? "https" : "http").SetQuery(null).SetCredentials(null, null).ToString();
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m_url = Util.AppendDirSeparator(m_url, "/");
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}
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private System.Net.HttpWebRequest CreateRequest(string remotename, string queryparams)
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{
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System.Net.HttpWebRequest req = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(m_url + (Library.Utility.Uri.UrlEncode(remotename).Replace("+", "%20")) + (string.IsNullOrEmpty(queryparams) || queryparams.Trim().Length == 0 ? "" : "?" + queryparams));
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req.KeepAlive = false;
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req.UserAgent = "Duplicati Tahoe-LAFS Client v" + System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
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return req;
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}
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#region IBackend Members
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public void Test()
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{
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this.TestList();
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}
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public void CreateFolder()
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{
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System.Net.HttpWebRequest req = CreateRequest("", "t=mkdir");
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req.Method = System.Net.WebRequestMethods.Http.Post;
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Utility.AsyncHttpRequest areq = new Utility.AsyncHttpRequest(req);
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using (areq.GetResponse())
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{ }
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}
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public string DisplayName
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{
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get { return Strings.TahoeBackend.Displayname; }
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}
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public string ProtocolKey
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{
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get { return "tahoe"; }
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}
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public IEnumerable<IFileEntry> List()
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{
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TahoeEl data;
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try
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{
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var req = CreateRequest("", "t=json");
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req.Method = System.Net.WebRequestMethods.Http.Get;
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var areq = new Utility.AsyncHttpRequest(req);
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using (System.Net.HttpWebResponse resp = (System.Net.HttpWebResponse)areq.GetResponse())
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{
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int code = (int)resp.StatusCode;
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if (code < 200 || code >= 300) //For some reason Mono does not throw this automatically
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throw new System.Net.WebException(resp.StatusDescription, null, System.Net.WebExceptionStatus.ProtocolError, resp);
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using (var rs = areq.GetResponseStream())
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using (var sr = new System.IO.StreamReader(rs))
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using (var jr = new Newtonsoft.Json.JsonTextReader(sr))
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{
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var jsr =new Newtonsoft.Json.JsonSerializer();
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jsr.Converters.Add(new TahoeElConverter());
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data = jsr.Deserialize<TahoeEl>(jr);
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}
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}
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}
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catch (System.Net.WebException wex)
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{
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//Convert to better exception
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if (wex.Response as System.Net.HttpWebResponse != null)
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if ((wex.Response as System.Net.HttpWebResponse).StatusCode == System.Net.HttpStatusCode.Conflict || (wex.Response as System.Net.HttpWebResponse).StatusCode == System.Net.HttpStatusCode.NotFound)
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throw new Interface.FolderMissingException(Strings.TahoeBackend.MissingFolderError(m_url, wex.Message), wex);
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throw;
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}
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if (data == null || data.node == null || data.nodetype != "dirnode")
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throw new Exception("Invalid folder listing response");
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foreach (var e in data.node.children)
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{
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if (e.Value == null || e.Value.node == null)
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continue;
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bool isDir = e.Value.nodetype == "dirnode";
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bool isFile = e.Value.nodetype == "filenode";
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if (!isDir && !isFile)
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continue;
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FileEntry fe = new FileEntry(e.Key);
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fe.IsFolder = isDir;
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if (e.Value.node.metadata != null && e.Value.node.metadata.tahoe != null)
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fe.LastModification = Duplicati.Library.Utility.Utility.EPOCH + TimeSpan.FromSeconds(e.Value.node.metadata.tahoe.linkmotime);
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if (isFile)
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fe.Size = e.Value.node.size;
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yield return fe;
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}
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}
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public async Task PutAsync(string remotename, string filename, CancellationToken cancelToken)
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{
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using (System.IO.FileStream fs = System.IO.File.OpenRead(filename))
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await PutAsync(remotename, fs, cancelToken);
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}
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public void Get(string remotename, string filename)
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{
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using (System.IO.FileStream fs = System.IO.File.Create(filename))
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Get(remotename, fs);
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}
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public void Delete(string remotename)
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{
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try
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{
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System.Net.HttpWebRequest req = CreateRequest(remotename, "");
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req.Method = "DELETE";
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Utility.AsyncHttpRequest areq = new Utility.AsyncHttpRequest(req);
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using (areq.GetResponse())
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{ }
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}
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catch (System.Net.WebException wex)
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{
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if (wex.Response is HttpWebResponse response && response.StatusCode == System.Net.HttpStatusCode.NotFound)
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throw new FileMissingException(wex);
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else
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throw;
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}
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}
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public IList<ICommandLineArgument> SupportedCommands
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{
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get
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{
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return new List<ICommandLineArgument>(new ICommandLineArgument[] {
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new CommandLineArgument("use-ssl", CommandLineArgument.ArgumentType.Boolean, Strings.TahoeBackend.DescriptionUseSSLShort, Strings.TahoeBackend.DescriptionUseSSLLong),
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});
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}
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}
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public string Description
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{
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get { return Strings.TahoeBackend.Description; }
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}
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public string[] DNSName
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{
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get { return new string[] { new Uri(m_url).Host }; }
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}
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#endregion
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#region IDisposable Members
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public void Dispose()
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{
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}
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#endregion
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#region IStreamingBackend Members
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public async Task PutAsync(string remotename, System.IO.Stream stream, CancellationToken cancelToken)
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{
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try
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{
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System.Net.HttpWebRequest req = CreateRequest(remotename, "");
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req.Method = System.Net.WebRequestMethods.Http.Put;
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req.ContentType = "application/binary";
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try { req.ContentLength = stream.Length; }
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catch { }
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Utility.AsyncHttpRequest areq = new Utility.AsyncHttpRequest(req);
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using (System.IO.Stream s = areq.GetRequestStream())
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await Utility.Utility.CopyStreamAsync(stream, s, true, cancelToken, m_copybuffer);
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using (System.Net.HttpWebResponse resp = (System.Net.HttpWebResponse)areq.GetResponse())
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{
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int code = (int)resp.StatusCode;
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if (code < 200 || code >= 300) //For some reason Mono does not throw this automatically
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throw new System.Net.WebException(resp.StatusDescription, null, System.Net.WebExceptionStatus.ProtocolError, resp);
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}
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}
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catch (System.Net.WebException wex)
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{
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//Convert to better exception
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if (wex.Response as System.Net.HttpWebResponse != null)
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if ((wex.Response as System.Net.HttpWebResponse).StatusCode == System.Net.HttpStatusCode.Conflict || (wex.Response as System.Net.HttpWebResponse).StatusCode == System.Net.HttpStatusCode.NotFound)
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throw new Interface.FolderMissingException(Strings.TahoeBackend.MissingFolderError(m_url, wex.Message), wex);
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throw;
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}
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}
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public void Get(string remotename, System.IO.Stream stream)
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{
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var req = CreateRequest(remotename, "");
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req.Method = System.Net.WebRequestMethods.Http.Get;
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var areq = new Utility.AsyncHttpRequest(req);
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using (var resp = (System.Net.HttpWebResponse)areq.GetResponse())
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{
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int code = (int)resp.StatusCode;
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if (code < 200 || code >= 300) //For some reason Mono does not throw this automatically
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throw new System.Net.WebException(resp.StatusDescription, null, System.Net.WebExceptionStatus.ProtocolError, resp);
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using (var s = areq.GetResponseStream())
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Utility.Utility.CopyStream(s, stream, true, m_copybuffer);
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}
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}
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#endregion
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}
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}
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