kenneth@hexad.dk
c74092f8a9
Now the WebRequest.Timeout property ONLY affects the GetRequestStream() and GetResponse() methods as the documentation says it SHOULD. git-svn-id: https://duplicati.googlecode.com/svn/trunk@1331 59da171f-624f-0410-aa54-27559c288bec
448 lines
18 KiB
C#
448 lines
18 KiB
C#
#region Disclaimer / License
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// Copyright (C) 2011, Kenneth Skovhede
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// http://www.hexad.dk, opensource@hexad.dk
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Net;
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using Duplicati.Library.Interface;
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namespace Duplicati.Library.Backend
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{
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public class CloudFiles : IBackend_v2, IStreamingBackend, IBackendGUI
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{
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public const string AUTH_URL_US = "https://api.mosso.com/auth";
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public const string AUTH_URL_UK = "https://lon.auth.api.rackspacecloud.com/v1.0";
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private const string DUMMY_HOSTNAME = "api.mosso.com";
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private readonly System.Text.RegularExpressions.Regex URL_PARSING = new System.Text.RegularExpressions.Regex("cloudfiles://(?<path>.+)", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
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public static readonly KeyValuePair<string, string>[] KNOWN_CLOUDFILES_PROVIDERS = new KeyValuePair<string, string>[] {
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new KeyValuePair<string, string>("Rackspace US", AUTH_URL_US),
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new KeyValuePair<string, string>("Rackspace UK", AUTH_URL_UK),
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};
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private const int ITEM_LIST_LIMIT = 1000;
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private string m_username;
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private string m_password;
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private string m_path;
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private string m_storageUrl = null;
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private string m_authToken = null;
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private string m_authUrl;
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public CloudFiles()
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{
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}
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public CloudFiles(string url, Dictionary<string, string> options)
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{
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if (options.ContainsKey("ftp-username"))
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m_username = options["ftp-username"];
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if (options.ContainsKey("ftp-password"))
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m_password = options["ftp-password"];
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if (options.ContainsKey("cloudfiles-username"))
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m_username = options["cloudfiles-username"];
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if (options.ContainsKey("cloudfiles-accesskey"))
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m_password = options["cloudfiles-accesskey"];
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if (string.IsNullOrEmpty(m_username))
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throw new Exception(Strings.CloudFiles.NoUserIDError);
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if (string.IsNullOrEmpty(m_password))
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throw new Exception(Strings.CloudFiles.NoAPIKeyError);
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//Fallback to the previous format
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if (url.Contains(DUMMY_HOSTNAME))
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{
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Uri u = new Uri(url);
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if (!string.IsNullOrEmpty(u.UserInfo))
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{
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if (u.UserInfo.IndexOf(":") >= 0)
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{
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m_username = u.UserInfo.Substring(0, u.UserInfo.IndexOf(":"));
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m_password = u.UserInfo.Substring(u.UserInfo.IndexOf(":") + 1);
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}
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else
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{
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m_username = u.UserInfo;
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}
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}
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//We use the api.mosso.com hostname.
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//This allows the use of containers that have names that are not valid hostnames,
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// such as container names with spaces in them
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if (u.Host.Equals(DUMMY_HOSTNAME))
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m_path = System.Web.HttpUtility.UrlDecode(u.PathAndQuery);
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else
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m_path = u.Host + System.Web.HttpUtility.UrlDecode(u.PathAndQuery);
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}
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else
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{
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System.Text.RegularExpressions.Match m = URL_PARSING.Match(url);
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if (!m.Success)
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throw new Exception(string.Format(Strings.CloudFiles.InvalidUrlError, url));
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m_path = m.Groups["path"].Value;
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}
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if (m_path.EndsWith("/"))
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m_path = m_path.Substring(0, m_path.Length - 1);
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if (!m_path.StartsWith("/"))
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m_path = "/" + m_path;
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if (!options.TryGetValue("cloudfiles-authentication-url", out m_authUrl))
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m_authUrl = Utility.Utility.ParseBoolOption(options, "cloudfiles-uk-account") ? AUTH_URL_UK : AUTH_URL_US;
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}
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#region IBackend Members
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public string DisplayName
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{
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get { return Strings.CloudFiles.DisplayName; }
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}
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public string ProtocolKey
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{
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get { return "cloudfiles"; }
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}
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public List<IFileEntry> List()
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{
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List<IFileEntry> files = new List<IFileEntry>();
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string extraUrl = "?format=xml&limit=" + ITEM_LIST_LIMIT.ToString();
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string markerUrl = "";
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bool repeat;
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do
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{
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System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
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HttpWebRequest req = CreateRequest("", extraUrl + markerUrl);
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try
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{
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Utility.AsyncHttpRequest areq = new Utility.AsyncHttpRequest(req);
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using (HttpWebResponse resp = (HttpWebResponse)areq.GetResponse())
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using (System.IO.Stream s = resp.GetResponseStream())
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doc.Load(s);
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}
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catch (WebException wex)
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{
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if (markerUrl == "") //Only check on first itteration
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if (wex.Response is HttpWebResponse && ((HttpWebResponse)wex.Response).StatusCode == HttpStatusCode.NotFound)
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throw new FolderMissingException(wex);
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//Other error, just re-throw
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throw;
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}
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System.Xml.XmlNodeList lst = doc.SelectNodes("container/object");
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//Perhaps the folder does not exist?
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//The response should be 404 from the server, but it is not :(
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if (lst.Count == 0 && markerUrl == "") //Only on first itteration
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{
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try { CreateFolder(); }
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catch { } //Ignore
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}
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string lastItemName = "";
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foreach (System.Xml.XmlNode n in lst)
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{
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string name = n["name"].InnerText;
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long size;
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DateTime mod;
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if (!long.TryParse(n["bytes"].InnerText, out size))
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size = -1;
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if (!DateTime.TryParse(n["last_modified"].InnerText, out mod))
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mod = new DateTime();
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lastItemName = name;
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files.Add(new FileEntry(name, size, mod, mod));
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}
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repeat = lst.Count == ITEM_LIST_LIMIT;
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if (repeat)
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markerUrl = "&marker=" + System.Web.HttpUtility.UrlEncode(lastItemName);
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} while (repeat);
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return files;
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}
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public void Put(string remotename, string filename)
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{
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using (System.IO.FileStream fs = System.IO.File.OpenRead(filename))
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Put(remotename, fs);
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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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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 (HttpWebResponse resp = (HttpWebResponse)areq.GetResponse())
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if ((int)resp.StatusCode >= 300)
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throw new WebException(Strings.CloudFiles.FileDeleteError, null, WebExceptionStatus.ProtocolError , resp);
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else
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using (resp.GetResponseStream())
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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("ftp-password", CommandLineArgument.ArgumentType.String, Strings.CloudFiles.DescriptionFTPPasswordShort, Strings.CloudFiles.DescriptionFTPPasswordLong),
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new CommandLineArgument("ftp-username", CommandLineArgument.ArgumentType.String, Strings.CloudFiles.DescriptionFTPUsernameShort, Strings.CloudFiles.DescriptionFTPUsernameLong),
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new CommandLineArgument("cloudfiles-username", CommandLineArgument.ArgumentType.String, Strings.CloudFiles.DescriptionUsernameShort, Strings.CloudFiles.DescriptionUsernameLong),
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new CommandLineArgument("cloudfiles-accesskey", CommandLineArgument.ArgumentType.String, Strings.CloudFiles.DescriptionPasswordShort, Strings.CloudFiles.DescriptionPasswordLong),
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new CommandLineArgument("cloudfiles-uk-account", CommandLineArgument.ArgumentType.Boolean, Strings.CloudFiles.DescriptionUKAccountShort, string.Format(Strings.CloudFiles.DescriptionUKAccountLong, "cloudfiles-authentication-url", AUTH_URL_UK)),
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new CommandLineArgument("cloudfiles-authentication-url", CommandLineArgument.ArgumentType.String, Strings.CloudFiles.DescriptionAuthenticationURLShort, string.Format(Strings.CloudFiles.DescriptionAuthenticationURLLong_v2, "cloudfiles-uk-account"), AUTH_URL_US),
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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.CloudFiles.Description_v2; }
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}
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#endregion
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#region IBackend_v2 Members
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public void Test()
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{
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//The "Folder not found" is not detectable :(
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List();
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}
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public void CreateFolder()
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{
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HttpWebRequest createReq = CreateRequest("", "");
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createReq.Method = "PUT";
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Utility.AsyncHttpRequest areq = new Utility.AsyncHttpRequest(createReq);
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using (HttpWebResponse resp = (HttpWebResponse)areq.GetResponse())
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{ }
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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 bool SupportsStreaming
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{
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get { return true; }
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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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HttpWebRequest req = CreateRequest("/" + remotename, "");
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req.Method = "GET";
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Utility.AsyncHttpRequest areq = new Utility.AsyncHttpRequest(req);
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using (WebResponse resp = areq.GetResponse())
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using (System.IO.Stream s = resp.GetResponseStream())
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using (MD5CalculatingStream mds = new MD5CalculatingStream(s))
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{
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string md5Hash = resp.Headers["ETag"];
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Utility.Utility.CopyStream(mds, stream);
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if (mds.GetFinalHashString().ToLower() != md5Hash.ToLower())
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throw new Exception(Strings.CloudFiles.ETagVerificationError);
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}
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}
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public void Put(string remotename, System.IO.Stream stream)
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{
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HttpWebRequest req = CreateRequest("/" + remotename, "");
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req.Method = "PUT";
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req.ContentType = "application/octet-stream";
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try { req.ContentLength = stream.Length; }
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catch { }
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//If we can pre-calculate the MD5 hash before transmission, do so
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/*if (stream.CanSeek)
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{
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System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create();
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req.Headers["ETag"] = Core.Utility.ByteArrayAsHexString(md5.ComputeHash(stream)).ToLower();
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stream.Seek(0, System.IO.SeekOrigin.Begin);
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using (System.IO.Stream s = req.GetRequestStream())
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Core.Utility.CopyStream(stream, s);
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//Reset the timeout to the default value of 100 seconds to
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// avoid blocking the GetResponse() call
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req.Timeout = 100000;
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//The server handles the eTag verification for us, and gives an error if the hash was a mismatch
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using (HttpWebResponse resp = (HttpWebResponse)req.GetResponse())
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if ((int)resp.StatusCode >= 300)
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throw new WebException(Strings.CloudFiles.FileUploadError, null, WebExceptionStatus.ProtocolError, resp);
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}
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else //Otherwise use a client-side calculation
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*/
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//TODO: We cannot use the local MD5 calculation, because that could involve a throttled read,
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// and may invoke various events
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{
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string fileHash = null;
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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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using (MD5CalculatingStream mds = new MD5CalculatingStream(s))
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{
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Utility.Utility.CopyStream(stream, mds);
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fileHash = mds.GetFinalHashString();
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}
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string md5Hash = null;
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//We need to verify the eTag locally
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try
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{
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using (HttpWebResponse resp = (HttpWebResponse)areq.GetResponse())
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if ((int)resp.StatusCode >= 300)
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throw new WebException(Strings.CloudFiles.FileUploadError, null, WebExceptionStatus.ProtocolError, resp);
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else
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md5Hash = resp.Headers["ETag"];
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}
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catch (WebException wex)
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{
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//Catch 404 and turn it into a FolderNotFound error
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if (wex.Response is HttpWebResponse && ((HttpWebResponse)wex.Response).StatusCode == HttpStatusCode.NotFound)
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throw new FolderMissingException(wex);
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//Other error, just re-throw
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throw;
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}
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if (md5Hash == null || md5Hash.ToLower() != fileHash.ToLower())
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{
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//Remove the broken file
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try { Delete(remotename); }
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catch { }
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throw new Exception(Strings.CloudFiles.ETagVerificationError);
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}
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}
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}
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#endregion
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private HttpWebRequest CreateRequest(string remotename, string query)
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{
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//If this is the first call, get an authentication token
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if (string.IsNullOrEmpty(m_authToken) || string.IsNullOrEmpty(m_storageUrl))
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{
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HttpWebRequest authReq = (HttpWebRequest)HttpWebRequest.Create(m_authUrl);
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authReq.Headers.Add("X-Auth-User", m_username);
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authReq.Headers.Add("X-Auth-Key", m_password);
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authReq.Method = "GET";
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Utility.AsyncHttpRequest areq = new Utility.AsyncHttpRequest(authReq);
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using (WebResponse resp = areq.GetResponse())
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{
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m_storageUrl = resp.Headers["X-Storage-Url"];
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m_authToken = resp.Headers["X-Auth-Token"];
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}
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if (string.IsNullOrEmpty(m_authToken) || string.IsNullOrEmpty(m_storageUrl))
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throw new Exception(Strings.CloudFiles.UnexpectedResponseError);
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}
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HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(m_storageUrl + UrlEncode(m_path + remotename) + query);
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req.Headers.Add("X-Auth-Token", UrlEncode(m_authToken));
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req.UserAgent = "Duplicati CloudFiles Backend v" + System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();
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req.KeepAlive = false;
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req.PreAuthenticate = true;
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req.AllowWriteStreamBuffering = false;
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return req;
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}
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private string UrlEncode(string value)
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{
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return System.Web.HttpUtility.UrlEncode(value).Replace("+", "%20").Replace("%2f", "/");
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}
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#region IBackendGUI Members
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public string PageTitle
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{
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get { return CloudFilesUI.PageTitle; }
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}
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public string PageDescription
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{
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get { return CloudFilesUI.PageDescription; }
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}
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public System.Windows.Forms.Control GetControl(IDictionary<string, string> applicationSettings, IDictionary<string, string> options)
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{
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return new CloudFilesUI(options);
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}
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public void Leave(System.Windows.Forms.Control control)
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{
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((CloudFilesUI)control).Save(false);
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}
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public bool Validate(System.Windows.Forms.Control control)
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{
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return ((CloudFilesUI)control).Save(true);
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}
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public string GetConfiguration(IDictionary<string, string> applicationSettings, IDictionary<string, string> guiOptions, IDictionary<string, string> commandlineOptions)
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{
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return CloudFilesUI.GetConfiguration(guiOptions, commandlineOptions);
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}
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#endregion
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}
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}
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