ACE/examples/Web_Crawler/URL.h

   1 /* -*- C++ -*- */
   2
   3 //=============================================================================
   4 /**
   5  *  @file    URL.h
   6  *
   7  *  @author Douglas C. Schmidt <d.schmidt@vanderbilt.edu>
   8  */
   9 //=============================================================================
  10
  11
  12 #ifndef _URL_H
  13 #define _URL_H
  14
  15 #include "Mem_Map_Stream.h"
  16
  17 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  18 #pragma once
  19 #endif /* ACE_LACKS_PRAGMA_ONCE */
  20
  21 #include "URL_Addr.h"
  22 #include "URL_Status.h"
  23
  24 #include "ace/SString.h"
  25
  26
  27 // Forward declaration.
  28 class URL_Visitor;
  29
  30 /**
  31  * @class URL
  32  *
  33  * @brief Base class for a URL.
  34  *
  35  * This class plays a role in the Visitor pattern.
  36  */
  37 class URL
  38 {
  39 public:
  40   /// Destructor.
  41   virtual ~URL ();
  42
  43   /**
  44    * Accept the visitor, which will then perform a particular
  45    * visitation strategy on the URL.  This method is part of the
  46    * Visitor pattern.
  47    */
  48   virtual int accept (URL_Visitor *visitor) = 0;
  49
  50   /// Send a <GET> command to fetch the contents in the URI from the
  51   /// server.
  52   virtual ssize_t send_request () = 0;
  53
  54   /// Returns the URL that we represent.
  55   virtual const ACE_URL_Addr &url_addr () const = 0;
  56
  57   /// Returns the <Mem_Map_Stream>.
  58   virtual Mem_Map_Stream &stream ();
  59
  60   // = Get/set the reply status.
  61   virtual const URL_Status &reply_status ();
  62   virtual void reply_status (const URL_Status &);
  63
  64   // = Get/set the reply status.
  65   virtual const ACE_CString &content_type ();
  66   virtual void content_type (const ACE_CString &);
  67
  68
  69 private:
  70   /// Reply status of the URL.
  71   URL_Status reply_status_;
  72
  73   /// Content-type of the URL.
  74   ACE_CString content_type_;
  75
  76   /// Contents of the stream.
  77   Mem_Map_Stream stream_;
  78 };
  79
  80 #endif /* _URL_H */