class THttpServer: public TNamed

 constructor

 destructor
 delete all http engines and sniffer

 Set TRootSniffer to the server
 Server takes ownership over sniffer

 returns read-only mode

 Set read-only mode for the server (default on)
 In read-only server is not allowed to change any ROOT object, registered to the server
 Server also cannot execute objects method via exe.json request

 add files location, which could be used in the server
 one could map some system folder to the server like AddLocation("mydir/","/home/user/specials");
 Than files from this directory could be addressed via server like
 http://localhost:8080/mydir/myfile.root

 Set location of JSROOT to use with the server
 One could specify address like:
   https://root.cern.ch/js/3.3
   http://web-docs.gsi.de/~linev/js/3.3
 This allows to get new JSROOT features with old server,
 reduce load on THttpServer instance, also startup time can be improved
 When empty string specified (default), local copy of JSROOT is used (distributed with ROOT)

 Set file name of HTML page, delivered by the server when
 http address is opened in the browser.
 By default, $ROOTSYS/etc/http/files/online.htm page is used
 When empty filename is specified, default page will be used

 Set file name of HTML page, delivered by the server when
 objects drawing page is requested from the browser
 By default, $ROOTSYS/etc/http/files/draw.htm page is used
 When empty filename is specified, default page will be used

 factory method to create different http engines
 At the moment two engine kinds are supported:
  civetweb (default) and fastcgi
 Examples:
   "civetweb:8080" or "http:8080" or ":8080" - creates civetweb web server with http port 8080
   "fastcgi:9000" - creates fastcgi server with port 9000
   "dabc:1237"    - create DABC server with port 1237 (only available with DABC installed)
   "dabc:master_host:port" - attach to DABC master, running on master_host:port (only available with DABC installed)

 create timer which will invoke ProcessRequests() function periodically
 Timer is required to perform all actions in main ROOT thread
 Method arguments are the same as for TTimer constructor
 By default, sync timer with 100 ms period is created

 If milliSec == 0, no timer will be created.
 In this case application should regularly call ProcessRequests() method.

 Checked that filename does not contains relative path below current directory
 Used to prevent access to files below current directory

 Verifies that request is just file name
 File names typically contains prefix like "jsrootsys/"
 If true, method returns real name of the file,
 which should be delivered to the client
 Method is thread safe and can be called from any thread

 Executes http request, specified in THttpCallArg structure
 Method can be called from any thread
 Actual execution will be done in main ROOT thread, where analysis code is running.

 Process requests, submitted for execution
 Regularly invoked by THttpTimer, when somewhere in the code
 gSystem->ProcessEvents() is called.
 User can call serv->ProcessRequests() directly, but only from main analysis thread.

 Process single http request
 Depending from requested path and filename different actions will be performed.
 In most cases information is provided by TRootSniffer class

 Register object in folders hierarchy

 See TRootSniffer::RegisterObject() for more details

 Unregister object in folders hierarchy

 See TRootSniffer::UnregisterObject() for more details

 Restrict access to specified object

 See TRootSniffer::Restrict() for more details

 Register command which can be executed from web interface

 As method one typically specifies string, which is executed with
 gROOT->ProcessLine() method. For instance
    serv->RegisterCommand("Invoke","InvokeFunction()");

 Or one could specify any method of the object which is already registered
 to the server. For instance:
     serv->Register("/", hpx);
     serv->RegisterCommand("/ResetHPX", "/hpx/->Reset()");
 Here symbols '/->' separates item name from method to be executed

 One could specify additional arguments in the command with
 syntax like %arg1%, %arg2% and so on. For example:
     serv->RegisterCommand("/ResetHPX", "/hpx/->SetTitle(\"%arg1%\")");
     serv->RegisterCommand("/RebinHPXPY", "/hpxpy/->Rebin2D(%arg1%,%arg2%)");
 Such parameter(s) will be requested when command clicked in the browser.

 Once command is registered, one could specify icon which will appear in the browser:
     serv->SetIcon("/ResetHPX", "rootsys/icons/ed_execute.png");

 One also can set extra property '_fastcmd', that command appear as
 tool button on the top of the browser tree:
     serv->SetItemField("/ResetHPX", "_fastcmd", "true");
 Or it is equivalent to specifying extra argument when register command:
     serv->RegisterCommand("/ResetHPX", "/hpx/->Reset()", "button;rootsys/icons/ed_delete.png");

 hides folder or element from web gui

 set name of icon, used in browser together with the item

 One could use images from $ROOTSYS directory like:
    serv->SetIcon("/ResetHPX","/rootsys/icons/ed_execute.png");

 Returns MIME type base on file extension

 reads file content

 returns pointer on objects sniffer

 set name of top item in objects hierarchy

 returns name of top item in objects hierarchy