Change license to GPL, add VFS, directory listing and upload support

Tesses.WebServer.NetStandard/TessesServer.cs

@@ -12,10 +12,12 @@ using Newtonsoft.Json;
 using System.Security.Cryptography.X509Certificates;
 using System.Net.Security;
 using System.Security.Authentication;
+using System.Web;
+using Tesses.VirtualFilesystem;
 
 namespace Tesses.WebServer
 {
-        internal class SendEventArgs : EventArgs
+    internal class SendEventArgs : EventArgs
     {
         public string Data {get;set;}
     }
@@ -493,61 +495,192 @@ namespace Tesses.WebServer
     /// <summary>
     /// returns 404 not found page
     /// </summary>
-    public class NotFoundServer : Server
+    public class NotFoundServer : SameServer
     {
         /// <summary>
         /// 404 not found custom html use "{url}" in your html as url
         /// </summary>
         /// <param name="html">the custom html</param>
-        public NotFoundServer(string html)
+        public NotFoundServer(string html) : base(html)
         {
-            _html = html;
+            
         }
         /// <summary>
         ///404 not found default html
         /// </summary>
-        public NotFoundServer()
+        public NotFoundServer() : base("<html><head><title>File {url} not found</title></head><body><h1>404 Not Found</h1><h4>{url}</h4></body></html>")
         {
-            _html = "<html><head><title>File {url} not found</title></head><body><h1>404 Not Found</h1><h4>{url}</h4></body></html>";
+            
         }
+        
+    }
+    public class SameServer : Server
+    {
+        /// <summary>
+        /// html use "{url}" in your html as url
+        /// </summary>
+        /// <param name="html">the custom html</param>
+        /// <param name="statusCode">the status code</param>
+        public SameServer(string html,int statusCode=404)
+        {
+            _html=html;
+            _statusCode = statusCode;
+        }
+        int _statusCode;
         string _html;
         public override async Task GetAsync(ServerContext ctx)
         {
-            ctx.StatusCode = 404;
+            
+            ctx.StatusCode = _statusCode;
             await ctx.SendTextAsync( _html.Replace("{url}", WebUtility.HtmlEncode(ctx.OriginalUrlPath)));
         }
     }
-    /// <summary>
-    /// Serve static files (doesnt allow listing files)
-    /// </summary>
-    public class StaticServer : Server
+    
+    public enum WebServerPathType
     {
+        NotFound=-1,
+        File=0,
+        Directory=1
+    }
+    public sealed class WebServerPathEntry
+    {
+        public WebServerPathEntry(string fname,WebServerPathType type,string url)
+        {
+            FileName = fname;
+            Type =type;
+            Url = url;
+        }
+        public string FileName {get;set;}
+        public string Url {get;set;}
+
+        public WebServerPathType Type {get;set;}
+    }
+    public interface IFileHandler
+    {
+        IEnumerable<string> ListDirectory(string path);
+        bool DefaultFileExists(string path,out string name);
+        WebServerPathEntry GetPath(string path);
+        Stream CreateFile(string path);
+        Stream Open(WebServerPathEntry entry);
+        void CreateDirectory(string dir);
+    }
+    public sealed class WebServerStyleFilesystemHandler : IFileHandler
+    {
+        string[] _defaultFileNames;
+        IVirtualFilesystem _fs;
+        /// <summary>
+        /// construct with filesystem
+        /// </summary>
+        /// <param name="fs">filesystem for root</param>
+        public WebServerStyleFilesystemHandler(IVirtualFilesystem fs)
+        {
+              _defaultFileNames = new string[] {"index.html","index.htm","default.html","default.htm" };
+              _fs=fs;
+        }
+        /// <summary>
+        /// construct with filesystem, custom filenames
+        /// </summary>
+        /// <param name="path">filesystem for root</param>
+        /// <param name="defaultFileNames">like index.html, index.htm, default.html, default.htm</param>
+      
+        public WebServerStyleFilesystemHandler(IVirtualFilesystem fs,string[] defaultFileNames)
+        {
+            _fs = fs;
+           
+            _defaultFileNames = defaultFileNames;
+        }
+
+        public void CreateDirectory(string dir)
+        {
+            _fs.CreateDirectory(Special.Root / dir);
+        }
+
+        public Stream CreateFile(string name)
+        {
+            return _fs.Open(Special.Root / name,FileMode.Create,FileAccess.ReadWrite,FileShare.None);
+        }
+
+        public bool DefaultFileExists(string path, out string name)
+        {
+            foreach(var def in _defaultFileNames)
+            {
+                var _name = Special.Root / path;
+                name=_name.Path;
+                if(_fs.FileExists(_name))
+                {
+                    return true;
+                }
+            }
+            name = "";
+            return false;
+        }
+
+        public WebServerPathEntry GetPath(string path)
+        {
+            UnixPath someUrl = WebUtility.UrlDecode(path);
+            
+            if (_fs.DirectoryExists(someUrl))
+            {
+                string name;
+                if(DefaultFileExists(someUrl.Path,out name))
+                {
+                    return new WebServerPathEntry(name,WebServerPathType.File,path);
+                }else{
+                    return new WebServerPathEntry(someUrl.Path,WebServerPathType.Directory,path);
+                }
+            }
+            else if (_fs.FileExists(someUrl))
+            {
+                return new WebServerPathEntry(someUrl.Path,WebServerPathType.File,path);
+            }
+            else
+            {
+                return new WebServerPathEntry(someUrl.Path,WebServerPathType.NotFound,path);
+            }
+        }
+
+        public IEnumerable<string> ListDirectory(string path)
+        {
+            foreach(var item in _fs.EnumerateDirectories(Special.Root/path))
+            {
+                yield return item.Name + "/";
+            }
+            foreach(var item in _fs.EnumerateFiles(Special.Root/path))
+            {
+                yield return item.Name;
+            }
+        }
+        public Stream Open(WebServerPathEntry path)
+        {
+            return _fs.Open(Special.Root / path.FileName,FileMode.Open,FileAccess.Read,FileShare.Read);
+        }
+    }
+    public sealed class WebServerStyleFileHandler : IFileHandler
+    {
+        string[] _defaultFileNames;
         string _path;
-        IServer _server;
         /// <summary>
         /// construct with path
         /// </summary>
-        /// <param name="path">directory for server</param>
-        public StaticServer(string path)
+        /// <param name="path">directory for root</param>
+        public WebServerStyleFileHandler(string path)
         {
-            _path = path;
-            _server = new NotFoundServer();
-            _defaultFileNames = new string[] {"index.html","index.htm","default.html","default.htm" };
+              _defaultFileNames = new string[] {"index.html","index.htm","default.html","default.htm" };
+              _path=path;
         }
-        string[] _defaultFileNames;
-        /// <summary>
-        /// construct with path, custom filenames, and server for not found
+         /// <summary>
+        /// construct with path, custom filenames
         /// </summary>
-        /// <param name="path">directory for server</param>
+        /// <param name="path">directory for root</param>
         /// <param name="defaultFileNames">like index.html, index.htm, default.html, default.htm</param>
-        /// <param name="notfoundserver">404 not found server</param>
-        public StaticServer(string path,string[] defaultFileNames,IServer notfoundserver)
+      
+        public WebServerStyleFileHandler(string path,string[] defaultFileNames)
         {
             _path = path;
-            _server = notfoundserver;
+           
             _defaultFileNames = defaultFileNames;
         }
-        public bool DefaultFileExists(string path,out string name)
+         public bool DefaultFileExists(string path,out string name)
         {
             foreach(var def in _defaultFileNames)
             {
@@ -560,31 +693,473 @@ namespace Tesses.WebServer
             name = "";
             return false;
         }
-
-
-        public override async Task GetAsync(ServerContext ctx)
+        public WebServerPathEntry GetPath(string url)
         {
-            string someUrl = Path.Combine(_path,WebUtility.UrlDecode(ctx.UrlPath.Substring(1)).Replace('/', Path.DirectorySeparatorChar));
+            string someUrl = Path.Combine(_path,WebUtility.UrlDecode(url.Substring(1)).Replace('/', Path.DirectorySeparatorChar));
             //Console.WriteLine(someUrl);
             if (Directory.Exists(someUrl))
             {
                 string name;
                 if(DefaultFileExists(someUrl,out name))
                 {
-                    await ctx.SendFileAsync(name);
+                    return new WebServerPathEntry(name,WebServerPathType.File,url);
+                }else{
+                    return new WebServerPathEntry(someUrl,WebServerPathType.Directory,url);
                 }
             }
             else if (File.Exists(someUrl))
             {
-                await ctx.SendFileAsync(someUrl);
+                return new WebServerPathEntry(someUrl,WebServerPathType.File,url);
             }
             else
             {
-                await _server.GetAsync(ctx);
+                return new WebServerPathEntry(someUrl,WebServerPathType.NotFound,url);
+            }
+        }
+
+        public IEnumerable<string> ListDirectory(string path)
+        {
+            string someUrl = Path.Combine(_path,WebUtility.UrlDecode(path.Substring(1)).Replace('/', Path.DirectorySeparatorChar));
+           
+            foreach(var item in Directory.GetDirectories(someUrl))
+            {
+                yield return $"{Path.GetFileName(item)}/";
+            }
+            foreach(var item in Directory.GetFiles(someUrl))
+            {
+                yield return Path.GetFileName(item);
+            
+            }
+        }
+        public Stream CreateFile(string entry)
+        {
+            string someUrl = Path.Combine(_path,WebUtility.UrlDecode(entry.Substring(1)).Replace('/', Path.DirectorySeparatorChar));
+            
+            return File.Create(someUrl);
+        }
+         public Stream Open(WebServerPathEntry entry)
+        {
+            return File.OpenRead(entry.FileName);
+        }
+
+        public void CreateDirectory(string dir)
+        {
+            Directory.CreateDirectory(Path.Combine(_path,dir.Substring(1).Replace('/', Path.DirectorySeparatorChar)));
+        }
+    }
+
+    public class StaticServerFileHandler : EventArgs
+    {
+        public string RealPath {get;set;}
+        public string CurrentHttpPath {get;set;}
+
+        public bool HasBeenHandled {get;set;}=false;
+
+        public ServerContext Context {get;set;}
+
+        public bool Cancel {get;set;}=false;
+    }
+    public enum UploadAllowedResponse
+    {
+        Yes=0,
+        NoISentResponse=1,
+        No=2
+    }
+    /// <summary>
+    /// Serve static files (doesnt allow listing files)
+    /// </summary>
+    public class StaticServer : Server
+    {
+        public bool AllowUpload {get;set;}=false;
+        bool allow=false;
+
+        public Func<ServerContext,UploadAllowedResponse> AllowedToUpload {get;set;}=DefaultAllowedToUpload;
+
+        public static UploadAllowedResponse DefaultAllowedToUpload(ServerContext ctx)
+        {
+            return UploadAllowedResponse.Yes;
+        }
+        private bool? getEnvVar()
+        {
+            string allowListStr=Environment.GetEnvironmentVariable("TESSES_WEBSERVER_ALLOW_LISTING");
+            if(!string.IsNullOrWhiteSpace(allowListStr))
+            {
+                string allowLst = allowListStr.ToLower();
+                if(allowLst == "1" || allowLst == "true" || allowLst == "on" || allowLst == "yes" || allowLst == "y" || allowLst == "t" || allowLst == "allow" || allowLst=="allowed" || allowLst == "a")
+                {
+                    return true;
+                }
+                if(allowLst == "0" || allowLst == "false" || allowLst == "off" || allowLst == "no" || allowLst == "n" || allowLst == "f" || allowLst == "deny" || allowLst == "denied" || allowLst == "d")
+                {
+                    return false;
+                }
+            }
+            return null;
+        }
+        public bool AllowListingDirectories {get {
+            bool? var= getEnvVar();
+            if(!var.HasValue)
+            {
+                return allow;
+            }
+            return var.Value;
+        } set {
+            allow=value;
+        }}
+        public EventHandler<StaticServerFileHandler> FileHandler;
+        IServer _server;
+        IFileHandler fileHandler;
+        IServer _forbidden;
+             /// <summary>
+        /// construct with filesystem
+        /// </summary>
+        /// <param name="path">filesystem for server</param>
+        public StaticServer(IVirtualFilesystem fs)
+        {
+            _server = new NotFoundServer();
+            fileHandler=new WebServerStyleFilesystemHandler(fs);
+            _forbidden = new SameServer("<html><head><title>File {url} not accessable</title></head><body><h1>403 Forbidden</h1><h4>{url}</h4></body></html>",403);
+        }
+       
+        /// <summary>
+        /// construct with filesystem, custom filenames, and server for not found
+        /// </summary>
+        /// <param name="path">filesystem for server</param>
+        /// <param name="defaultFileNames">like index.html, index.htm, default.html, default.htm</param>
+        /// <param name="notfoundserver">404 not found server</param>
+        public StaticServer(IVirtualFilesystem fs,string[] defaultFileNames,IServer notfoundserver)
+        {
+            
+            _server = notfoundserver;
+           fileHandler=new WebServerStyleFilesystemHandler(fs,defaultFileNames);
+           _forbidden = new SameServer("<html><head><title>File {url} not accessable</title></head><body><h1>403 Forbidden</h1><h4>{url}</h4></body></html>",403);
+       
+        }
+        /// <summary>
+        /// construct with filesystem, custom filenames, and server for not found
+        /// </summary>
+        /// <param name="path">filesystem for server</param>
+        /// <param name="defaultFileNames">like index.html, index.htm, default.html, default.htm</param>
+        /// <param name="notfoundserver">404 not found server</param>
+        /// <param name="allowListing">whether to allow listing directory or not (overridable by environment variable with TESSES_WEBSERVER_ALLOW_LISTING=true|false)
+        public StaticServer(IVirtualFilesystem fs,string[] defaultFileNames,IServer notfoundserver,bool allowListing)
+        {
+            _server = notfoundserver;
+             fileHandler=new WebServerStyleFilesystemHandler(fs,defaultFileNames);
+              AllowListingDirectories = allowListing;
+              _forbidden = new SameServer("<html><head><title>File {url} not accessable</title></head><body><h1>403 Forbidden</h1><h4>{url}</h4></body></html>",403);
+       
+        }
+        /// <summary>
+        /// construct with filesystem, custom filenames, and server for not found, server for forbidden and with option to allow/deny listing directories
+        /// </summary>
+        /// <param name="path">filesystem for server</param>
+        /// <param name="defaultFileNames">like index.html, index.htm, default.html, default.htm</param>
+        /// <param name="notfoundserver">404 not found server</param>
+        /// <param name="forbidden">server for forbidden files/denied listing</param>
+        /// <param name="allowListing">whether to allow listing directory or not (overridable by environment variable with TESSES_WEBSERVER_ALLOW_LISTING=true|false)
+        
+        public StaticServer(IVirtualFilesystem fs,string[] defaultFileNames,IServer notfoundserver,IServer forbidden,bool allowListing)
+        {
+            _server = notfoundserver;
+            fileHandler= fileHandler=new WebServerStyleFilesystemHandler(fs,defaultFileNames);
+            AllowListingDirectories = allowListing;
+            _forbidden=forbidden;
+        }
+        /// <summary>
+        /// construct with filesystem, custom filenames and with option to allow/deny listing directories
+        /// </summary>
+        /// <param name="path">filesystem for server</param>
+        /// <param name="defaultFileNames">like index.html, index.htm, default.html, default.htm</param>
+        /// <param name="allowListing">whether to allow listing directory or not (overridable by environment variable with TESSES_WEBSERVER_ALLOW_LISTING=true|false)
+      
+         public StaticServer(IVirtualFilesystem fs,string[] defaultFileNames,bool allowListing)
+        {
+            _server = new NotFoundServer();
+             fileHandler=new WebServerStyleFilesystemHandler(fs,defaultFileNames);
+            AllowListingDirectories = allowListing;
+            _forbidden = new SameServer("<html><head><title>File {url} not accessable</title></head><body><h1>403 Forbidden</h1><h4>{url}</h4></body></html>",403);
+       
+        }
+        /// <summary>
+        /// construct with filesystem and with option to allow/deny listing directories
+        /// </summary>
+        /// <param name="path">filesystem for server</param>
+         /// <param name="allowListing">whether to allow listing directory or not (overridable by environment variable with TESSES_WEBSERVER_ALLOW_LISTING=true|false)
+      
+         public StaticServer(IVirtualFilesystem fs,bool allowListing)
+        {
+            _server = new NotFoundServer();
+            fileHandler=new WebServerStyleFilesystemHandler(fs);
+            AllowListingDirectories = allowListing;
+            _forbidden = new SameServer("<html><head><title>File {url} not accessable</title></head><body><h1>403 Forbidden</h1><h4>{url}</h4></body></html>",403);
+       
+        }
+
+        /// <summary>
+        /// construct with path
+        /// </summary>
+        /// <param name="path">directory for server</param>
+        public StaticServer(string path)
+        {
+            _server = new NotFoundServer();
+            fileHandler=new WebServerStyleFileHandler(path);
+            _forbidden = new SameServer("<html><head><title>File {url} not accessable</title></head><body><h1>403 Forbidden</h1><h4>{url}</h4></body></html>",403);
+        }
+       
+        /// <summary>
+        /// construct with path, custom filenames, and server for not found
+        /// </summary>
+        /// <param name="path">directory for server</param>
+        /// <param name="defaultFileNames">like index.html, index.htm, default.html, default.htm</param>
+        /// <param name="notfoundserver">404 not found server</param>
+        public StaticServer(string path,string[] defaultFileNames,IServer notfoundserver)
+        {
+            
+            _server = notfoundserver;
+            fileHandler=new WebServerStyleFileHandler(path,defaultFileNames);
+           _forbidden = new SameServer("<html><head><title>File {url} not accessable</title></head><body><h1>403 Forbidden</h1><h4>{url}</h4></body></html>",403);
+       
+        }
+        /// <summary>
+        /// construct with path, custom filenames, and server for not found
+        /// </summary>
+        /// <param name="path">directory for server</param>
+        /// <param name="defaultFileNames">like index.html, index.htm, default.html, default.htm</param>
+        /// <param name="notfoundserver">404 not found server</param>
+        /// <param name="allowListing">whether to allow listing directory or not (overridable by environment variable with TESSES_WEBSERVER_ALLOW_LISTING=true|false)
+        public StaticServer(string path,string[] defaultFileNames,IServer notfoundserver,bool allowListing)
+        {
+            _server = notfoundserver;
+            fileHandler=new WebServerStyleFileHandler(path,defaultFileNames);
+            AllowListingDirectories = allowListing;
+              _forbidden = new SameServer("<html><head><title>File {url} not accessable</title></head><body><h1>403 Forbidden</h1><h4>{url}</h4></body></html>",403);
+       
+        }
+        /// <summary>
+        /// construct with path, custom filenames, and server for not found, server for forbidden and with option to allow/deny listing directories
+        /// </summary>
+        /// <param name="path">directory for server</param>
+        /// <param name="defaultFileNames">like index.html, index.htm, default.html, default.htm</param>
+        /// <param name="notfoundserver">404 not found server</param>
+        /// <param name="forbidden">server for forbidden files/denied listing</param>
+        /// <param name="allowListing">whether to allow listing directory or not (overridable by environment variable with TESSES_WEBSERVER_ALLOW_LISTING=true|false)
+        
+        public StaticServer(string path,string[] defaultFileNames,IServer notfoundserver,IServer forbidden,bool allowListing)
+        {
+            _server = notfoundserver;
+            fileHandler=new WebServerStyleFileHandler(path,defaultFileNames);
+            AllowListingDirectories = allowListing;
+            _forbidden=forbidden;
+        }
+        /// <summary>
+        /// construct with path, custom filenames and with option to allow/deny listing directories
+        /// </summary>
+        /// <param name="path">directory for server</param>
+        /// <param name="defaultFileNames">like index.html, index.htm, default.html, default.htm</param>
+        /// <param name="allowListing">whether to allow listing directory or not (overridable by environment variable with TESSES_WEBSERVER_ALLOW_LISTING=true|false)
+      
+         public StaticServer(string path,string[] defaultFileNames,bool allowListing)
+        {
+            _server = new NotFoundServer();
+            fileHandler=new WebServerStyleFileHandler(path,defaultFileNames);
+            AllowListingDirectories = allowListing;
+            _forbidden = new SameServer("<html><head><title>File {url} not accessable</title></head><body><h1>403 Forbidden</h1><h4>{url}</h4></body></html>",403);
+       
+        }
+        /// <summary>
+        /// construct with path and with option to allow/deny listing directories
+        /// </summary>
+        /// <param name="path">directory for server</param>
+         /// <param name="allowListing">whether to allow listing directory or not (overridable by environment variable with TESSES_WEBSERVER_ALLOW_LISTING=true|false)
+      
+         public StaticServer(string path,bool allowListing)
+        {
+            _server = new NotFoundServer();
+            fileHandler=new WebServerStyleFileHandler(path);
+            AllowListingDirectories = allowListing;
+            _forbidden = new SameServer("<html><head><title>File {url} not accessable</title></head><body><h1>403 Forbidden</h1><h4>{url}</h4></body></html>",403);
+       
+        }
+        public bool DefaultFileExists(string path,out string name)
+        {
+            return fileHandler.DefaultFileExists(path,out name);
+        }
+        public override async Task OtherAsync(ServerContext ctx)
+        {
+            if(ctx.Method == "PUT")
+            {
+                    if(AllowUpload)
+                    {
+                         var res=AllowedToUpload(ctx);
+                         if(res == UploadAllowedResponse.Yes)
+                         {
+                            bool fileExists = fileHandler.GetPath(ctx.UrlPath).Type == WebServerPathType.File;
+                            using(var file = fileHandler.CreateFile(ctx.UrlPath))
+                            {
+                                await ctx.ReadToStreamAsync(file);
+                            }
+                            ctx.StatusCode = fileExists ? 204 : 201;
+                            ctx.ResponseHeaders.Add("Content-Location",ctx.UrlPath);
+                            await ctx.WriteHeadersAsync();
+                         }else if(res == UploadAllowedResponse.No)
+                         {
+                            await _forbidden.GetAsync(ctx);
+                         }
+                    }
+            }
+        }
+        public override async Task PostAsync(ServerContext ctx)
+        {
+            
+            var fileEntry = fileHandler.GetPath(ctx.UrlPath);
+           
+                if(fileEntry.Type == WebServerPathType.Directory)
+                {
+                    if(AllowUpload)
+                    {
+                         var res=AllowedToUpload(ctx);
+                         if(res == UploadAllowedResponse.Yes)
+                         {
+                            //upload files and dirs
+                            
+                           var res0= ctx.ParseBody((fieldName,fileName,ctype)=>{
+                                return fileHandler.CreateFile($"{ctx.UrlPath}/{fileName.TrimStart('/')}");
+                            });
+                            foreach(var item in res0)
+                            {
+                                item.Value.Dispose();
+                            }
+                            List<string> dirs=new List<string>();
+                            if(ctx.QueryParams.TryGetValue("mkdir",out dirs))
+                            {
+                                foreach(var dir in dirs)
+                                {
+                                    fileHandler.CreateDirectory($"{ctx.UrlPath}/{dir.TrimStart('/')}");
+                                }
+                            }
+
+                         }else if(res == UploadAllowedResponse.No)
+                         {
+                               await _forbidden.GetAsync(ctx);
+                         }
+                    }
+                }
+           
+        }
+        public override async Task GetAsync(ServerContext ctx)
+        {
+            var fileEntry = fileHandler.GetPath(ctx.UrlPath);
+            try{
+            switch(fileEntry.Type)
+            {
+                case WebServerPathType.File:
+                    using(var strm = fileHandler.Open(fileEntry))
+                        await ctx.SendStreamAsync(strm,HeyRed.Mime.MimeTypesMap.GetMimeType(fileEntry.FileName));
+                    break;
+                case WebServerPathType.Directory:
+                    if(AllowListingDirectories)
+                    {
+                        DirectoryLister lister=new DirectoryLister();
+                        lister.FromDirectory(fileHandler,ctx.UrlPath,ctx.OriginalUrlPath);
+                        await lister.GetAsync(ctx);
+                    }
+                    else
+                    {
+                        await _forbidden.GetAsync(ctx);                
+                    }
+                    break;
+                case WebServerPathType.NotFound:
+                    await _server.GetAsync(ctx);
+                    break;
+            }
+            }catch(UnauthorizedAccessException ex)
+            {
+                _=ex;
+                await _forbidden.GetAsync(ctx);
             }
         }
 
     }
+    
+    public class DirectoryLister : Server
+    {
+        public static string GetFileName(string url)
+        {
+            if(Path.DirectorySeparatorChar == '/')
+            {
+                return Path.GetFileName(url);
+            }
+            return Path.GetFileName(url.Replace('/',Path.DirectorySeparatorChar));
+        }
+        private static string _getFileNameWithoutQuery(string url)
+        {
+            int r = url.IndexOf('?');
+            if(r > -1)
+            {
+                return GetFileName(url.Remove(r).TrimEnd('/')) + (url.EndsWith("/") ? "/" : "");
+            }
+            return GetFileName(url.TrimEnd('/')) + (url.EndsWith("/") ? "/" : "");
+        }
+        static string defaultText=GetEnumerable("Default","",new string[0]);
+
+        string curText=defaultText;
+
+        public static string GetEnumerable(string title,string desc,IEnumerable<string> entries)
+        {
+            /*if(!this.ln.Path.EndsWith("/"))
+            {
+                SendRedirect(this.ln.Path + '/');
+                return;
+            }*/
+            StringBuilder b=new StringBuilder();
+            b.Append($"<!doctype><html><head><title>{HttpUtility.HtmlEncode(title)}</title></head><body><center><h1>{HttpUtility.HtmlEncode(title)}</h1></center><center>{HttpUtility.HtmlEncode(desc)}</center><hr><a href=\"..\">../</a><br>");
+            foreach(var entry in entries)
+            {
+                //<a href=
+                b.Append($"<a href=\"{HttpUtility.HtmlAttributeEncode(entry)}\">{HttpUtility.HtmlEncode(_getFileNameWithoutQuery(entry))}</a><br>");
+            }
+            b.Append("<hr><br><center><a href=\"https://www.nuget.org/packages/Tesses.WebServer\">Tesses.WebServer</a></center></body></html>");
+
+            return b.ToString();
+        }
+        public string Title {get;set;}="Directory Listing";
+        public string Description {get;set;}="";
+        public void FromEnumerable(string title,string desc,IEnumerable<string> entries)
+        {
+            curText = GetEnumerable(title,desc,entries);
+        }
+        public void FromDirectory(string title,string desc,string directory,string reqPath)
+        {
+                   List<string> items=new List<string>();
+                    foreach(var item in Directory.EnumerateDirectories(directory))
+                    {
+                        items.Add(item + "/");
+                    }
+                    foreach(var item in Directory.EnumerateFiles(directory))
+                    {
+                        items.Add(item);
+                    }
+                    
+                    FromEnumerable(title,desc,items);
+                   
+
+        }
+        public void FromDirectory(string directory,string reqPath)
+        {
+            FromDirectory($"Index of {reqPath}","Directory listing",directory,reqPath);
+        }
+        public void FromDirectory(IFileHandler handler,string reqPath,string ogPath="/")
+        {
+            FromEnumerable($"Index of {ogPath}","Directory listing",handler.ListDirectory(reqPath));
+        }
+
+        public override async Task GetAsync(ServerContext ctx)
+        {
+           await  ctx.SendTextAsync(curText);
+        }
+    }
+
     /// <summary>
     /// Server where you can change inner server
     /// </summary>