260 lines
12 KiB
C#
260 lines
12 KiB
C#
// Copyright (C) 2015, The Duplicati Team
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// http://www.duplicati.com, info@duplicati.com
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// 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, but
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// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Linq;
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using HttpServer.HttpModules;
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using Duplicati.Server.WebServer.RESTMethods;
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using Duplicati.Library.RestAPI;
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namespace Duplicati.Server.WebServer
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{
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public class RESTHandler : HttpModule
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{
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public const string API_URI_PATH = "/api/v1";
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public static readonly int API_URI_SEGMENTS = API_URI_PATH.Split(new char[] {'/'}).Length;
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private static readonly Dictionary<string, IRESTMethod> _modules = new Dictionary<string, IRESTMethod>(StringComparer.OrdinalIgnoreCase);
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public static IDictionary<string, IRESTMethod> Modules { get { return _modules; } }
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/// <summary>
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/// Loads all REST modules in the Duplicati.Server.WebServer.RESTMethods namespace
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/// </summary>
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static RESTHandler()
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{
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var lst =
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from n in typeof(IRESTMethod).Assembly.GetTypes()
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where
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n.Namespace == typeof(IRESTMethod).Namespace
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&&
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typeof(IRESTMethod).IsAssignableFrom(n)
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&&
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!n.IsAbstract
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&&
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!n.IsInterface
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select n;
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foreach(var t in lst)
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{
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var m = (IRESTMethod)Activator.CreateInstance(t);
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_modules.Add(t.Name.ToLowerInvariant(), m);
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}
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}
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public static void HandleControlCGI(HttpServer.IHttpRequest request, HttpServer.IHttpResponse response, HttpServer.Sessions.IHttpSession session, Type module)
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{
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var method = request.Method;
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if (!string.IsNullOrWhiteSpace(request.Headers["X-HTTP-Method-Override"]))
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method = request.Headers["X-HTTP-Method-Override"];
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DoProcess(request, response, session, method, module.Name.ToLowerInvariant(), (String.Equals(request.Method, "POST", StringComparison.OrdinalIgnoreCase) ? request.Form : request.QueryString)["id"].Value);
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}
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private static readonly ConcurrentDictionary<string, System.Globalization.CultureInfo> _cultureCache = new ConcurrentDictionary<string, System.Globalization.CultureInfo>(StringComparer.OrdinalIgnoreCase);
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private static System.Globalization.CultureInfo ParseRequestCulture(RequestInfo info)
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{
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// Inject the override
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return ParseRequestCulture(string.Format("{0},{1}", info.Request.Headers["X-UI-Language"], info.Request.Headers["Accept-Language"]));
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}
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public static System.Globalization.CultureInfo ParseDefaultRequestCulture(RequestInfo info)
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{
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if (info == null)
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return null;
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return ParseRequestCulture(info.Request.Headers["Accept-Language"]);
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}
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private static System.Globalization.CultureInfo ParseRequestCulture(string acceptheader)
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{
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acceptheader = acceptheader ?? string.Empty;
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// Lock-free read
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System.Globalization.CultureInfo ci;
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if (_cultureCache.TryGetValue(acceptheader, out ci))
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return ci;
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// Lock-free assignment, we might compute the value twice
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return _cultureCache[acceptheader] =
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// Parse headers like "Accept-Language: da, en-gb;q=0.8, en;q=0.7"
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acceptheader
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.Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries)
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.Select(x =>
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{
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var opts = x.Split(new[] { ";" }, StringSplitOptions.RemoveEmptyEntries);
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var lang = opts.FirstOrDefault();
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var weight =
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opts.Where(y => y.StartsWith("q=", StringComparison.OrdinalIgnoreCase))
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.Select(y =>
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{
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float f;
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float.TryParse(y.Substring(2), System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture, out f);
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return f;
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}).FirstOrDefault();
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// Set the default weight=1
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if (weight <= 0.001 && weight >= 0)
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weight = 1;
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return new KeyValuePair<string, float>(lang, weight);
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})
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// Handle priority
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.OrderByDescending(x => x.Value)
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.Select(x => x.Key)
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.Distinct()
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// Filter invalid/unsupported items
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.Where(x => !string.IsNullOrWhiteSpace(x) && Library.Localization.LocalizationService.ParseCulture(x) != null)
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.Select(x => Library.Localization.LocalizationService.ParseCulture(x))
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// And get the first that works
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.FirstOrDefault();
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}
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public static void DoProcess(RequestInfo info, string method, string module, string key)
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{
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var ci = ParseRequestCulture(info);
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using (Library.Localization.LocalizationService.TemporaryContext(ci))
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{
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try
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{
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if (ci != null)
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info.Response.AddHeader("Content-Language", ci.Name);
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IRESTMethod mod;
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_modules.TryGetValue(module, out mod);
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if (mod == null)
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{
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info.Response.Status = System.Net.HttpStatusCode.NotFound;
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info.Response.Reason = "No such module";
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}
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else if (method == HttpServer.Method.Get && mod is IRESTMethodGET get)
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{
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if (info.Request.Form != HttpServer.HttpForm.EmptyForm)
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{
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if (info.Request.QueryString == HttpServer.HttpInput.Empty)
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{
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var r = info.Request.GetType().GetField("_queryString", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
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r.SetValue(info.Request, new HttpServer.HttpInput("formdata"));
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}
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foreach (HttpServer.HttpInputItem v in info.Request.Form)
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if (!info.Request.QueryString.Contains(v.Name))
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info.Request.QueryString.Add(v.Name, v.Value);
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}
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get.GET(key, info);
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}
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else if (method == HttpServer.Method.Put && mod is IRESTMethodPUT put)
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put.PUT(key, info);
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else if (method == HttpServer.Method.Post && mod is IRESTMethodPOST post)
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{
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if (info.Request.Form == HttpServer.HttpForm.EmptyForm || info.Request.Form == HttpServer.HttpInput.Empty)
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{
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var r = info.Request.GetType().GetMethod("AssignForm", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance, null, new Type[] {typeof(HttpServer.HttpForm)}, null);
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r.Invoke(info.Request, new object[] {new HttpServer.HttpForm(info.Request.QueryString)});
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}
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else
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{
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foreach (HttpServer.HttpInputItem v in info.Request.QueryString)
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if (!info.Request.Form.Contains(v.Name))
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info.Request.Form.Add(v.Name, v.Value);
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}
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post.POST(key, info);
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}
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else if (method == HttpServer.Method.Delete && mod is IRESTMethodDELETE delete)
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delete.DELETE(key, info);
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else if (method == "PATCH" && mod is IRESTMethodPATCH patch)
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patch.PATCH(key, info);
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else
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{
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info.Response.Status = System.Net.HttpStatusCode.MethodNotAllowed;
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info.Response.Reason = "Method is not allowed";
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}
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}
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catch (Exception ex)
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{
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FIXMEGlobal.DataConnection.LogError("", string.Format("Request for {0} gave error", info.Request.Uri), ex);
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Console.WriteLine(ex);
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try
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{
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if (!info.Response.HeadersSent)
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{
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info.Response.Status = System.Net.HttpStatusCode.InternalServerError;
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info.Response.Reason = "Error";
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info.Response.ContentType = "text/plain";
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var wex = ex;
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while (wex is System.Reflection.TargetInvocationException && wex.InnerException != wex)
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wex = wex.InnerException;
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info.BodyWriter.WriteJsonObject(new
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{
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Message = wex.Message,
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Type = wex.GetType().Name,
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#if DEBUG
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Stacktrace = wex.ToString()
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#endif
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});
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info.BodyWriter.Flush();
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}
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}
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catch (Exception flex)
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{
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FIXMEGlobal.DataConnection.LogError("", "Reporting error gave error", flex);
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}
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}
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}
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}
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public static void DoProcess(HttpServer.IHttpRequest request, HttpServer.IHttpResponse response, HttpServer.Sessions.IHttpSession session, string method, string module, string key)
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{
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using(var reqinfo = new RequestInfo(request, response, session))
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DoProcess(reqinfo, method, module, key);
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}
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public override bool Process(HttpServer.IHttpRequest request, HttpServer.IHttpResponse response, HttpServer.Sessions.IHttpSession session)
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{
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if (!request.Uri.AbsolutePath.StartsWith(API_URI_PATH, StringComparison.OrdinalIgnoreCase))
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return false;
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var module = request.Uri.Segments.Skip(API_URI_SEGMENTS).FirstOrDefault();
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if (string.IsNullOrWhiteSpace(module))
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module = "help";
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module = module.Trim('/');
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var key = string.Join("", request.Uri.Segments.Skip(API_URI_SEGMENTS + 1)).Trim('/');
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var method = request.Method;
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if (!string.IsNullOrWhiteSpace(request.Headers["X-HTTP-Method-Override"]))
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method = request.Headers["X-HTTP-Method-Override"];
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DoProcess(request, response, session, method, module, key);
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return true;
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}
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}
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}
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