TNetFile

class TNetFile : public TFile

    private:

          TNetFile TNetFile()
              void Init(Bool_t create)
      virtual void Print(Option_t* option) const
              void PrintError(const char* where, Int_t err) const
             Int_t Recv(Int_t& status, EMessageTypes& kind)

    public:

             TNetFile TNetFile(const char* url, Option_t* option, const char* ftitle, Int_t compress = 1)
         virtual void ~TNetFile()
       static TClass* Class()
         virtual void Close(Option_t* option)
         virtual void Flush()
      virtual TClass* IsA() const
       virtual Bool_t IsOpen() const
       virtual Bool_t ReadBuffer(char* buf, int len)
         virtual void Seek(Seek_t offset, TFile::ERelativeTo pos = kBeg)
         virtual void ShowMembers(TMemberInspector& insp, char* parent)
         virtual void Streamer(TBuffer& b)
                 void StreamerNVirtual(TBuffer& b)
       virtual Bool_t WriteBuffer(const char* buf, int len)

  Data Members
    private:

          TUrl fUrl     URL of file
       TString fUser    remote user name
        Seek_t fOffset  seek offset
      TSocket* fSocket  connection to rootd server

Class Description

                                                                      
 TNetFile                                                             
                                                                      
 A TNetFile is like a normal TFile except that it reads and writes    
 its data via a rootd server (for more on the rootd daemon see the    
 source files root/rootd/src/*.cxx). TNetFile file names are in       
 standard URL format with protocol "root" or "roots". The following   
 are valid TNetFile URL's:                                            
                                                                      
    roots://hpsalo/files/aap.root                                     
    root://hpbrun.cern.ch/root/hsimple.root                           
    root://pcna49a:5151/~na49/data/run821.root                        
    root://pcna49d.cern.ch:5050//v1/data/run810.root                  
                                                                      
 The only difference with the well known httpd URL's is that the root 
 of the remote file tree is the user's home directory. Therefore an   
 absolute pathname requires a // after the host or port specifier     
 (see last example). Further the expansion of the standard shell      
 characters, like ~, $, .., are handled as expected.                  
 TNetFile (actually TUrl) uses 1094 as default port for rootd.        
                                                                      
 Connecting to a rootd requires the remote user id and password.      
 TNetFile allows three ways for you to provide your login:            
   1) Setting it globally via the static functions:                   
          TNetFile::SetUser() and TNetFile::SetPasswd()               
   2) Getting it from the ~/.netrc file (same file as used by ftp)    
   3) Command line prompt                                             
 The different methods will be tried in the order given above.        
 On machines with AFS rootd will authenticate using AFS (if it was    
 compiled with AFS support).                                          
                                                                      
 If the protocol was specified as "roots" a secure authetication      
 method will be used. The secure method uses the SRP, Secure Remote   
 Passwords, package. SRP uses a so called "asymmetric key exchange    
 protocol" in which no passwords are ever send over the wire. This    
 protocol is safe against all known security attacks. For more see:   
  NetFile 
                                                              
                                                                      
 The rootd daemon lives in the directory $ROOTSYS/bin. It can be      
 started either via inetd or by hand from the command line (no need   
 to be super user). For more info about rootd see the web page:       
  NetFile 
                                                              
                                                                      

 Create a NetFile object. A net file is the same as a TFile
 except that it is being accessed via a rootd server. The url
 argument must be of the form: root[s]://host.dom.ain/file.root.
 When protocol is "roots" try using secure authentication.
 If the file specified in the URL does not exist, is not accessable
 or can not be created the kZombie bit will be set in the TNetFile
 object. Use IsZombie() to see if the file is accessable.
 If the remote daemon thinks the file is still connected, while you are
 sure this is not the case you can force open the file by preceding the
 option argument with an "f" or "F" , e.g.: "frecreate". Do this only
 in cases when you are very sure nobody else is using the file.
 For a description of the option and other arguments see the TFile ctor.
 The preferred interface to this constructor is via TFile::Open().

 TNetFile dtor. Send close message and close socket.

 Close remote file.

 Flush file to disk.

 Initialize a TNetFile object.

 Retruns kTRUE if file is open, kFALSE otherwise.

 Print some info about the net file.

 Print error string depending on error code.

 Read specified byte range from remote file via rootd daemon.
 Returns kTRUE in case of error.

 Write specified byte range to remote file via rootd daemon.
 Returns kTRUE in case of error.

 Return status from rootd server and message kind. Returns -1 in
 case of error otherwise 8 (sizeof 2 words, status and kind).

 Set position from where to start reading.

Inline Functions

           TNetFile TNetFile(const char* url, Option_t* option, const char* ftitle, Int_t compress = 1)
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void Streamer(TBuffer& b)
               void StreamerNVirtual(TBuffer& b)