private static void InitApplicationParts()
{
// Register the virtual path factory
var virtualPathFactory = new DictionaryBasedVirtualPathFactory();
VirtualPathFactoryManager.RegisterVirtualPathFactory(virtualPathFactory);
// Intantiate the part registry
_partRegistry = new ApplicationPartRegistry(virtualPathFactory);
// Register the resource route
RouteTable.Routes.Add(new Route(ResourceRoute, new ResourceRouteHandler(_partRegistry)));
}
internal static IHttpHandler CreateFromVirtualPath(string virtualPath, VirtualPathFactoryManager virtualPathFactoryManager)
{
// Instantiate the page from the virtual path
object instance = virtualPathFactoryManager.CreateInstance <object>(virtualPath);
WebPage page = instance as WebPage;
// If it's not a page, assume it's a regular handler
if (page == null)
{
return((IHttpHandler)instance);
}
// Mark it as a 'top level' page (as opposed to a user control or master)
page.TopLevelPage = true;
// Give it its virtual path
page.VirtualPath = virtualPath;
// Return a handler over it
return(new WebPageHttpHandler(page));
}
internal static WebPageBase CreateInstanceFromVirtualPath(string virtualPath, VirtualPathFactoryManager virtualPathFactoryManager)
{
// Get the compiled object (through the VPP)
try {
WebPageBase webPage = virtualPathFactoryManager.CreateInstance <WebPageBase>(virtualPath);
// Give it its virtual path
webPage.VirtualPath = virtualPath;
return(webPage);
}
catch (HttpException e) {
Util.ThrowIfUnsupportedExtension(virtualPath, e);
throw;
}
}
internal static WebPageBase CreateInstanceFromVirtualPath(string virtualPath, Func <string, Type, object> createInstanceMethod)
{
return(CreateInstanceFromVirtualPath(virtualPath, VirtualPathFactoryManager.CreateFromLambda(virtualPath, createInstanceMethod)));
}
internal static WebPageMatch MatchRequest(string pathValue, IEnumerable <string> supportedExtensions, VirtualPathFactoryManager virtualPathFactoryManager)
{
string currentLevel = String.Empty;
string currentPathInfo = pathValue;
// We can skip the file exists check and normal lookup for empty paths, but we still need to look for default pages
if (!String.IsNullOrEmpty(pathValue))
{
// If the file exists and its not a supported extension, let the request go through
if (FileExists(pathValue, virtualPathFactoryManager))
{
// TODO: Look into switching to RawURL to eliminate the need for this issue
bool foundSupportedExtension = false;
foreach (string supportedExtension in supportedExtensions)
{
if (pathValue.EndsWith("." + supportedExtension, StringComparison.OrdinalIgnoreCase))
{
foundSupportedExtension = true;
break;
}
}
if (!foundSupportedExtension)
{
return(null);
}
}
// For each trimmed part of the path try to add a known extension and
// check if it matches a file in the application.
currentLevel = pathValue;
currentPathInfo = String.Empty;
while (true)
{
// Does the current route level patch any supported extension?
string routeLevelMatch = GetRouteLevelMatch(currentLevel, supportedExtensions, virtualPathFactoryManager);
if (routeLevelMatch != null)
{
return(new WebPageMatch(routeLevelMatch, currentPathInfo));
}
// Try to remove the last path segment (e.g. go from /foo/bar to /foo)
int indexOfLastSlash = currentLevel.LastIndexOf('/');
if (indexOfLastSlash == -1)
{
// If there are no more slashes, we're done
break;
}
else
{
// Chop off the last path segment to get to the next one
currentLevel = currentLevel.Substring(0, indexOfLastSlash);
// And save the path info in case there is a match
currentPathInfo = pathValue.Substring(indexOfLastSlash + 1);
}
}
}
// If we haven't found anything yet, now try looking for default.* or index.* at the current url
currentLevel = pathValue;
string currentLevelDefault;
string currentLevelIndex;
if (String.IsNullOrEmpty(currentLevel))
{
currentLevelDefault = "default";
currentLevelIndex = "index";
}
else
{
if (currentLevel[currentLevel.Length - 1] != '/')
{
currentLevel += "/";
}
currentLevelDefault = currentLevel + "default";
currentLevelIndex = currentLevel + "index";
}
// Does the current route level match any supported extension?
string defaultMatch = GetRouteLevelMatch(currentLevelDefault, supportedExtensions, virtualPathFactoryManager);
if (defaultMatch != null)
{
return(new WebPageMatch(defaultMatch, String.Empty));
}
string indexMatch = GetRouteLevelMatch(currentLevelIndex, supportedExtensions, virtualPathFactoryManager);
if (indexMatch != null)
{
return(new WebPageMatch(indexMatch, String.Empty));
}
return(null);
}
private static string GetRouteLevelMatch(string pathValue, IEnumerable <string> supportedExtensions, VirtualPathFactoryManager virtualPathFactoryManager)
{
foreach (string supportedExtension in supportedExtensions)
{
string virtualPath = pathValue;
// Only add the extension if it's not already there
if (!virtualPath.EndsWith("." + supportedExtension, StringComparison.OrdinalIgnoreCase))
{
virtualPath += "." + supportedExtension;
}
if (FileExists(virtualPath, virtualPathFactoryManager))
{
// If there's an exact match on disk, return it unless it starts with an underscore
if (Path.GetFileName(pathValue).StartsWith("_", StringComparison.OrdinalIgnoreCase))
{
throw new HttpException(WebPageResources.WebPageRoute_UnderscoreBlocked);
}
return(virtualPath);
}
}
return(null);
}
private static bool FileExists(string virtualPath, VirtualPathFactoryManager virtualPathFactoryManager)
{
var path = "~/" + virtualPath;
return(virtualPathFactoryManager.PageExists(path));
}