596 lines
24 KiB
C#
596 lines
24 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Security.Principal;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Web;
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using System.Web.Mvc;
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using System.Web.Routing;
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using Newtonsoft.Json;
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using Umbraco.Core;
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using Umbraco.Core.Configuration;
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using Umbraco.Core.IO;
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using Umbraco.Core.Logging;
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using Umbraco.Core.Security;
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using Umbraco.Web.Editors;
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using Umbraco.Web.Routing;
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using Umbraco.Web.Security;
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using umbraco;
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using Umbraco.Core.Sync;
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using GlobalSettings = Umbraco.Core.Configuration.GlobalSettings;
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using ObjectExtensions = Umbraco.Core.ObjectExtensions;
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using RenderingEngine = Umbraco.Core.RenderingEngine;
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namespace Umbraco.Web
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{
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// also look at IOHelper.ResolveUrlsFromTextString - nightmarish?!
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// context.RewritePath supports ~/ or else must begin with /vdir
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// Request.RawUrl is still there
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// response.Redirect does?! always remap to /vdir?!
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public class UmbracoModule : IHttpModule
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{
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#region HttpModule event handlers
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/// <summary>
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/// Begins to process a request.
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/// </summary>
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/// <param name="httpContext"></param>
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static void BeginRequest(HttpContextBase httpContext)
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{
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// ensure application url is initialized
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ApplicationUrlHelper.EnsureApplicationUrl(ApplicationContext.Current, httpContext.Request);
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// do not process if client-side request
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if (httpContext.Request.Url.IsClientSideRequest())
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return;
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//write the trace output for diagnostics at the end of the request
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httpContext.Trace.Write("UmbracoModule", "Umbraco request begins");
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// ok, process
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// create the LegacyRequestInitializer
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// and initialize legacy stuff
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var legacyRequestInitializer = new LegacyRequestInitializer(httpContext.Request.Url, httpContext);
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legacyRequestInitializer.InitializeRequest();
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// create the UmbracoContext singleton, one per request, and assign
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// NOTE: we assign 'true' to ensure the context is replaced if it is already set (i.e. during app startup)
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UmbracoContext.EnsureContext(
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httpContext,
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ApplicationContext.Current,
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new WebSecurity(httpContext, ApplicationContext.Current),
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true);
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}
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/// <summary>
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/// Processses the Umbraco Request
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/// </summary>
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/// <param name="httpContext"></param>
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/// <remarks>
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///
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/// This will check if we are trying to route to the default back office page (i.e. ~/Umbraco/ or ~/Umbraco or ~/Umbraco/Default )
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/// and ensure that the MVC handler executes for that. This is required because the route for /Umbraco will never execute because
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/// files/folders exist there and we cannot set the RouteCollection.RouteExistingFiles = true since that will muck a lot of other things up.
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/// So we handle it here and explicitly execute the MVC controller.
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///
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/// </remarks>
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void ProcessRequest(HttpContextBase httpContext)
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{
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// do not process if client-side request
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if (httpContext.Request.Url.IsClientSideRequest())
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return;
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if (UmbracoContext.Current == null)
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throw new InvalidOperationException("The UmbracoContext.Current is null, ProcessRequest cannot proceed unless there is a current UmbracoContext");
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if (UmbracoContext.Current.RoutingContext == null)
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throw new InvalidOperationException("The UmbracoContext.RoutingContext has not been assigned, ProcessRequest cannot proceed unless there is a RoutingContext assigned to the UmbracoContext");
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var umbracoContext = UmbracoContext.Current;
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//re-write for the default back office path
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if (httpContext.Request.Url.IsDefaultBackOfficeRequest())
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{
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if (EnsureIsConfigured(httpContext, umbracoContext.OriginalRequestUrl))
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{
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RewriteToBackOfficeHandler(httpContext);
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}
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return;
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}
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// do not process but remap to handler if it is a base rest request
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if (BaseRest.BaseRestHandler.IsBaseRestRequest(umbracoContext.OriginalRequestUrl))
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{
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httpContext.RemapHandler(new BaseRest.BaseRestHandler());
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return;
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}
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// do not process if this request is not a front-end routable page
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var isRoutableAttempt = EnsureUmbracoRoutablePage(umbracoContext, httpContext);
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//raise event here
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OnRouteAttempt(new RoutableAttemptEventArgs(isRoutableAttempt.Result, umbracoContext, httpContext));
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if (!isRoutableAttempt.Success)
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{
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return;
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}
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httpContext.Trace.Write("UmbracoModule", "Umbraco request confirmed");
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// ok, process
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// note: requestModule.UmbracoRewrite also did some stripping of &umbPage
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// from the querystring... that was in v3.x to fix some issues with pre-forms
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// auth. Paul Sterling confirmed in jan. 2013 that we can get rid of it.
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// instanciate, prepare and process the published content request
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// important to use CleanedUmbracoUrl - lowercase path-only version of the current url
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var pcr = new PublishedContentRequest(umbracoContext.CleanedUmbracoUrl, umbracoContext.RoutingContext);
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umbracoContext.PublishedContentRequest = pcr;
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pcr.Prepare();
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// HandleHttpResponseStatus returns a value indicating that the request should
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// not be processed any further, eg because it has been redirect. then, exit.
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if (HandleHttpResponseStatus(httpContext, pcr))
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return;
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if (!pcr.HasPublishedContent)
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httpContext.RemapHandler(new PublishedContentNotFoundHandler());
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else
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RewriteToUmbracoHandler(httpContext, pcr);
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}
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#endregion
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#region Methods
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/// <summary>
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/// Checks the current request and ensures that it is routable based on the structure of the request and URI
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/// </summary>
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/// <param name="context"></param>
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/// <param name="httpContext"></param>
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/// <returns></returns>
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internal Attempt<EnsureRoutableOutcome> EnsureUmbracoRoutablePage(UmbracoContext context, HttpContextBase httpContext)
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{
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var uri = context.OriginalRequestUrl;
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var reason = EnsureRoutableOutcome.IsRoutable;
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// ensure this is a document request
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if (!EnsureDocumentRequest(httpContext, uri))
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{
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reason = EnsureRoutableOutcome.NotDocumentRequest;
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}
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// ensure Umbraco is ready to serve documents
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else if (!EnsureIsReady(httpContext, uri))
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{
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reason = EnsureRoutableOutcome.NotReady;
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}
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// ensure Umbraco is properly configured to serve documents
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else if (!EnsureIsConfigured(httpContext, uri))
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{
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reason = EnsureRoutableOutcome.NotConfigured;
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}
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// ensure Umbraco has documents to serve
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else if (!EnsureHasContent(context, httpContext))
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{
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reason = EnsureRoutableOutcome.NoContent;
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}
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return Attempt.If(reason == EnsureRoutableOutcome.IsRoutable, reason);
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}
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/// <summary>
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/// Ensures that the request is a document request (i.e. one that the module should handle)
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/// </summary>
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/// <param name="httpContext"></param>
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/// <param name="uri"></param>
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/// <returns></returns>
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bool EnsureDocumentRequest(HttpContextBase httpContext, Uri uri)
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{
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var maybeDoc = true;
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var lpath = uri.AbsolutePath.ToLowerInvariant();
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// handle directory-urls used for asmx
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// legacy - what's the point really?
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if (/*maybeDoc &&*/ GlobalSettings.UseDirectoryUrls)
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{
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int asmxPos = lpath.IndexOf(".asmx/", StringComparison.OrdinalIgnoreCase);
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if (asmxPos >= 0)
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{
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// use uri.AbsolutePath, not path, 'cos path has been lowercased
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httpContext.RewritePath(uri.AbsolutePath.Substring(0, asmxPos + 5), // filePath
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uri.AbsolutePath.Substring(asmxPos + 5), // pathInfo
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uri.Query.TrimStart('?'));
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maybeDoc = false;
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}
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}
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// a document request should be
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// /foo/bar/nil
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// /foo/bar/nil/
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// /foo/bar/nil.aspx
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// where /foo is not a reserved path
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// if the path contains an extension that is not .aspx
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// then it cannot be a document request
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var extension = Path.GetExtension(lpath);
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if (maybeDoc && extension.IsNullOrWhiteSpace() == false && extension != ".aspx")
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maybeDoc = false;
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// at that point, either we have no extension, or it is .aspx
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// if the path is reserved then it cannot be a document request
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if (maybeDoc && GlobalSettings.IsReservedPathOrUrl(lpath, httpContext, _combinedRouteCollection.Value))
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maybeDoc = false;
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//NOTE: No need to warn, plus if we do we should log the document, as this message doesn't really tell us anything :)
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//if (!maybeDoc)
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//{
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// LogHelper.Warn<UmbracoModule>("Not a document");
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//}
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return maybeDoc;
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}
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// ensures Umbraco is ready to handle requests
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// if not, set status to 503 and transfer request, and return false
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// if yes, return true
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static bool EnsureIsReady(HttpContextBase httpContext, Uri uri)
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{
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var ready = ApplicationContext.Current.IsReady;
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// ensure we are ready
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if (!ready)
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{
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LogHelper.Warn<UmbracoModule>("Umbraco is not ready");
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if (UmbracoConfig.For.UmbracoSettings().Content.EnableSplashWhileLoading == false)
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{
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// let requests pile up and wait for 10s then show the splash anyway
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ready = ApplicationContext.Current.WaitForReady(10 * 1000);
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}
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if (!ready)
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{
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httpContext.Response.StatusCode = 503;
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var bootUrl = "~/config/splashes/booting.aspx";
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httpContext.RewritePath(UriUtility.ToAbsolute(bootUrl) + "?url=" + HttpUtility.UrlEncode(uri.ToString()));
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return false;
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}
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}
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return true;
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}
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// ensures Umbraco has at least one published node
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// if not, rewrites to splash and return false
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// if yes, return true
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private static bool EnsureHasContent(UmbracoContext context, HttpContextBase httpContext)
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{
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if (context.ContentCache.HasContent())
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return true;
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LogHelper.Warn<UmbracoModule>("Umbraco has no content");
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const string noContentUrl = "~/config/splashes/noNodes.aspx";
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httpContext.RewritePath(UriUtility.ToAbsolute(noContentUrl));
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return false;
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}
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private bool _notConfiguredReported;
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// ensures Umbraco is configured
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// if not, redirect to install and return false
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// if yes, return true
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private bool EnsureIsConfigured(HttpContextBase httpContext, Uri uri)
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{
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if (ApplicationContext.Current.IsConfigured)
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return true;
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if (_notConfiguredReported)
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{
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// remember it's been reported so we don't flood the log
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// no thread-safety so there may be a few log entries, doesn't matter
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_notConfiguredReported = true;
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LogHelper.Warn<UmbracoModule>("Umbraco is not configured");
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}
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var installPath = UriUtility.ToAbsolute(SystemDirectories.Install);
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var installUrl = string.Format("{0}/?redir=true&url={1}", installPath, HttpUtility.UrlEncode(uri.ToString()));
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httpContext.Response.Redirect(installUrl, true);
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return false;
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}
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// returns a value indicating whether redirection took place and the request has
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// been completed - because we don't want to Response.End() here to terminate
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// everything properly.
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internal static bool HandleHttpResponseStatus(HttpContextBase context, PublishedContentRequest pcr)
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{
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var end = false;
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var response = context.Response;
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LogHelper.Debug<UmbracoModule>("Response status: Redirect={0}, Is404={1}, StatusCode={2}",
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() => pcr.IsRedirect ? (pcr.IsRedirectPermanent ? "permanent" : "redirect") : "none",
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() => pcr.Is404 ? "true" : "false", () => pcr.ResponseStatusCode);
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if(pcr.Cacheability != default(HttpCacheability))
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response.Cache.SetCacheability(pcr.Cacheability);
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foreach (var cacheExtension in pcr.CacheExtensions)
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response.Cache.AppendCacheExtension(cacheExtension);
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foreach (var header in pcr.Headers)
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response.AppendHeader(header.Key, header.Value);
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if (pcr.IsRedirect)
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{
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if (pcr.IsRedirectPermanent)
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response.RedirectPermanent(pcr.RedirectUrl, false); // do not end response
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else
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response.Redirect(pcr.RedirectUrl, false); // do not end response
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end = true;
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}
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else if (pcr.Is404)
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{
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response.StatusCode = 404;
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response.TrySkipIisCustomErrors = UmbracoConfig.For.UmbracoSettings().WebRouting.TrySkipIisCustomErrors;
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if (response.TrySkipIisCustomErrors == false)
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LogHelper.Warn<UmbracoModule>("Status code is 404 yet TrySkipIisCustomErrors is false - IIS will take over.");
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}
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if (pcr.ResponseStatusCode > 0)
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{
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// set status code -- even for redirects
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response.StatusCode = pcr.ResponseStatusCode;
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response.StatusDescription = pcr.ResponseStatusDescription;
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}
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//if (pcr.IsRedirect)
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// response.End(); // end response -- kills the thread and does not return!
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if (pcr.IsRedirect)
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{
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response.Flush();
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// bypass everything and directly execute EndRequest event -- but returns
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context.ApplicationInstance.CompleteRequest();
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// though some say that .CompleteRequest() does not properly shutdown the response
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// and the request will hang until the whole code has run... would need to test?
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LogHelper.Debug<UmbracoModule>("Response status: redirecting, complete request now.");
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}
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return end;
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}
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/// <summary>
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/// Rewrites to the default back office page.
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/// </summary>
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/// <param name="context"></param>
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private static void RewriteToBackOfficeHandler(HttpContextBase context)
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{
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// GlobalSettings.Path has already been through IOHelper.ResolveUrl() so it begins with / and vdir (if any)
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var rewritePath = GlobalSettings.Path.TrimEnd(new[] { '/' }) + "/Default";
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// rewrite the path to the path of the handler (i.e. /umbraco/RenderMvc)
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context.RewritePath(rewritePath, "", "", false);
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//if it is MVC we need to do something special, we are not using TransferRequest as this will
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//require us to rewrite the path with query strings and then reparse the query strings, this would
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//also mean that we need to handle IIS 7 vs pre-IIS 7 differently. Instead we are just going to create
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//an instance of the UrlRoutingModule and call it's PostResolveRequestCache method. This does:
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// * Looks up the route based on the new rewritten URL
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// * Creates the RequestContext with all route parameters and then executes the correct handler that matches the route
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//we also cannot re-create this functionality because the setter for the HttpContext.Request.RequestContext is internal
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//so really, this is pretty much the only way without using Server.TransferRequest and if we did that, we'd have to rethink
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//a bunch of things!
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var urlRouting = new UrlRoutingModule();
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urlRouting.PostResolveRequestCache(context);
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}
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/// <summary>
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/// Rewrites to the Umbraco handler - we always send the request via our MVC rendering engine, this will deal with
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/// requests destined for webforms.
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/// </summary>
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/// <param name="context"></param>
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/// <param name="pcr"> </param>
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private static void RewriteToUmbracoHandler(HttpContextBase context, PublishedContentRequest pcr)
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{
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// NOTE: we do not want to use TransferRequest even though many docs say it is better with IIS7, turns out this is
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// not what we need. The purpose of TransferRequest is to ensure that .net processes all of the rules for the newly
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// rewritten url, but this is not what we want!
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// read: http://forums.iis.net/t/1146511.aspx
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var query = pcr.Uri.Query.TrimStart(new[] { '?' });
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// GlobalSettings.Path has already been through IOHelper.ResolveUrl() so it begins with / and vdir (if any)
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var rewritePath = GlobalSettings.Path.TrimEnd(new[] { '/' }) + "/RenderMvc";
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// rewrite the path to the path of the handler (i.e. /umbraco/RenderMvc)
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context.RewritePath(rewritePath, "", query, false);
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//if it is MVC we need to do something special, we are not using TransferRequest as this will
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//require us to rewrite the path with query strings and then reparse the query strings, this would
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//also mean that we need to handle IIS 7 vs pre-IIS 7 differently. Instead we are just going to create
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//an instance of the UrlRoutingModule and call it's PostResolveRequestCache method. This does:
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// * Looks up the route based on the new rewritten URL
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// * Creates the RequestContext with all route parameters and then executes the correct handler that matches the route
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//we also cannot re-create this functionality because the setter for the HttpContext.Request.RequestContext is internal
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//so really, this is pretty much the only way without using Server.TransferRequest and if we did that, we'd have to rethink
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//a bunch of things!
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var urlRouting = new UrlRoutingModule();
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urlRouting.PostResolveRequestCache(context);
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}
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/// <summary>
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/// Any object that is in the HttpContext.Items collection that is IDisposable will get disposed on the end of the request
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/// </summary>
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/// <param name="http"></param>
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private static void DisposeHttpContextItems(HttpContext http)
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{
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// do not process if client-side request
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if (http.Request.Url.IsClientSideRequest())
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return;
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//get a list of keys to dispose
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var keys = new HashSet<object>();
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foreach (DictionaryEntry i in http.Items)
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{
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if (i.Value is IDisposeOnRequestEnd || i.Key is IDisposeOnRequestEnd)
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{
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keys.Add(i.Key);
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}
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}
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//dispose each item and key that was found as disposable.
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foreach (var k in keys)
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{
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try
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{
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http.Items[k].DisposeIfDisposable();
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}
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catch (Exception ex)
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{
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LogHelper.Error<UmbracoModule>("Could not dispose item with key " + k, ex);
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}
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try
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{
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k.DisposeIfDisposable();
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}
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catch (Exception ex)
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{
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LogHelper.Error<UmbracoModule>("Could not dispose item key " + k, ex);
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}
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}
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}
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#endregion
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#region IHttpModule
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/// <summary>
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/// Initialize the module, this will trigger for each new application
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/// and there may be more than 1 application per application domain
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/// </summary>
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/// <param name="app"></param>
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public void Init(HttpApplication app)
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{
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app.BeginRequest += (sender, e) =>
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{
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var httpContext = ((HttpApplication)sender).Context;
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LogHelper.Debug<UmbracoModule>("Begin request: {0}.", () => httpContext.Request.Url);
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BeginRequest(new HttpContextWrapper(httpContext));
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};
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//disable asp.net headers (security)
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// This is the correct place to modify headers according to MS:
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// https://our.umbraco.org/forum/umbraco-7/using-umbraco-7/65241-Heap-error-from-header-manipulation?p=0#comment220889
|
|
app.PostReleaseRequestState += (sender, args) =>
|
|
{
|
|
var httpContext = ((HttpApplication)sender).Context;
|
|
try
|
|
{
|
|
httpContext.Response.Headers.Remove("Server");
|
|
//this doesn't normally work since IIS sets it but we'll keep it here anyways.
|
|
httpContext.Response.Headers.Remove("X-Powered-By");
|
|
httpContext.Response.Headers.Remove("X-AspNet-Version");
|
|
httpContext.Response.Headers.Remove("X-AspNetMvc-Version");
|
|
}
|
|
catch (PlatformNotSupportedException ex)
|
|
{
|
|
// can't remove headers this way on IIS6 or cassini.
|
|
}
|
|
};
|
|
|
|
app.PostResolveRequestCache += (sender, e) =>
|
|
{
|
|
var httpContext = ((HttpApplication)sender).Context;
|
|
ProcessRequest(new HttpContextWrapper(httpContext));
|
|
};
|
|
|
|
app.EndRequest += (sender, args) =>
|
|
{
|
|
var httpContext = ((HttpApplication)sender).Context;
|
|
if (UmbracoContext.Current != null && UmbracoContext.Current.IsFrontEndUmbracoRequest)
|
|
{
|
|
LogHelper.Debug<UmbracoModule>(
|
|
"Total milliseconds for umbraco request to process: {0}", () => DateTime.Now.Subtract(UmbracoContext.Current.ObjectCreated).TotalMilliseconds);
|
|
}
|
|
|
|
OnEndRequest(new UmbracoRequestEventArgs(UmbracoContext.Current, new HttpContextWrapper(httpContext)));
|
|
|
|
DisposeHttpContextItems(httpContext);
|
|
};
|
|
|
|
}
|
|
|
|
public void Dispose()
|
|
{
|
|
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Events
|
|
|
|
public static event EventHandler<RoutableAttemptEventArgs> RouteAttempt;
|
|
private void OnRouteAttempt(RoutableAttemptEventArgs args)
|
|
{
|
|
if (RouteAttempt != null)
|
|
RouteAttempt(this, args);
|
|
}
|
|
|
|
public static event EventHandler<UmbracoRequestEventArgs> EndRequest;
|
|
private void OnEndRequest(UmbracoRequestEventArgs args)
|
|
{
|
|
if (EndRequest != null)
|
|
EndRequest(this, args);
|
|
}
|
|
#endregion
|
|
|
|
|
|
/// <summary>
|
|
/// This is used to be passed into the GlobalSettings.IsReservedPathOrUrl and will include some 'fake' routes
|
|
/// used to determine if a path is reserved.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// This is basically used to reserve paths dynamically
|
|
/// </remarks>
|
|
private readonly Lazy<RouteCollection> _combinedRouteCollection = new Lazy<RouteCollection>(() =>
|
|
{
|
|
var allRoutes = new RouteCollection();
|
|
foreach (var route in RouteTable.Routes)
|
|
{
|
|
allRoutes.Add(route);
|
|
}
|
|
foreach (var reservedPath in ReservedPaths)
|
|
{
|
|
try
|
|
{
|
|
allRoutes.Add("_umbreserved_" + reservedPath.ReplaceNonAlphanumericChars(""),
|
|
new Route(reservedPath.TrimStart('/'), new StopRoutingHandler()));
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
LogHelper.Error<UmbracoModule>("Could not add reserved path route", ex);
|
|
}
|
|
}
|
|
|
|
return allRoutes;
|
|
});
|
|
|
|
/// <summary>
|
|
/// This is used internally to track any registered callback paths for Identity providers. If the request path matches
|
|
/// any of the registered paths, then the module will let the request keep executing
|
|
/// </summary>
|
|
internal static readonly ConcurrentHashSet<string> ReservedPaths = new ConcurrentHashSet<string>();
|
|
}
|
|
}
|