TAO/tao/HTTP_Handler.h

   1
   2 /* -*- C++ -*- */
   3
   4 //=============================================================================
   5 /**
   6  *  @file    HTTP_Handler.h
   7  *
   8  *   HTTP_Handler is a base class for HTTP_Reader and
   9  *   HTTP_Writer which are created in response to calls to
  10  *   read/write, as appropriate
  11  */
  12 //=============================================================================
  13
  14
  15 #ifndef TAO_HTTP_HANDLER_H
  16 #define TAO_HTTP_HANDLER_H
  17
  18 #include /**/ "tao/TAO_Export.h"
  19
  20 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  21 # pragma once
  22 #endif /* ACE_LACKS_PRAGMA_ONCE */
  23
  24 #include "tao/orbconf.h"
  25
  26 #if (TAO_HAS_HTTP_PARSER == 1)
  27
  28 #include "ace/SOCK_Stream.h"
  29 #include "ace/Svc_Handler.h"
  30 #include "ace/Message_Block.h"
  31 #include "tao/Versioned_Namespace.h"
  32
  33 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  34
  35 /**
  36  * @class TAO_HTTP_Handler
  37  * class to retrieve data via HTTP
  38  */
  39 class TAO_Export TAO_HTTP_Handler : public ACE_Svc_Handler <ACE_SOCK_STREAM, ACE_NULL_SYNCH>
  40 {
  41 public:
  42   /// Null constructor, insures that it works properly with Connector
  43   TAO_HTTP_Handler ();
  44
  45   /// Always use this constructor to make HTTP_Handlers
  46   TAO_HTTP_Handler (ACE_Message_Block *mb,
  47                     ACE_TCHAR *filename);
  48
  49   /// returns the number of bytes read/written in the last operation.
  50   size_t byte_count () const;
  51
  52   /// Activate this instance of the <HTTP_Handler>
  53   virtual int open (void * = 0);
  54
  55   /// Close down the Blob
  56   virtual int close (u_long flags = 0);
  57
  58   ~TAO_HTTP_Handler ();
  59
  60 protected:
  61   virtual int send_request ();
  62   virtual int receive_reply ();
  63
  64   ACE_Message_Block *mb_;
  65   ACE_TCHAR *filename_;
  66   size_t bytecount_;
  67   enum
  68   {
  69     /// The handler assumes that the first 2048 bytes of a server response
  70     /// contains the header
  71     MAX_HEADER_SIZE = 2048,
  72
  73     /// set the MAX_TRANSMISSION_UNIT (MTU) = BUFSIZ as defined by OS
  74     MTU = BUFSIZ
  75   };
  76 };
  77
  78 class TAO_HTTP_Reader : public TAO_HTTP_Handler
  79 {
  80 public:
  81   TAO_HTTP_Reader (ACE_Message_Block *mb,
  82                    ACE_TCHAR *filename,
  83                    const char *request_prefix = "GET",
  84                    const char *request_suffix = "HTTP/1.0\r\nAccept: HTTP/1.0\r\n\r\n");
  85
  86 private:
  87   //NOTE: these functions return -1 on error
  88   int send_request ();
  89   int receive_reply ();
  90   const char *request_prefix_;
  91   const char *request_suffix_;
  92 };
  93
  94 TAO_END_VERSIONED_NAMESPACE_DECL
  95
  96 #endif /* TAO_HAS_HTTP_PARSER == 1 */
  97
  98 #endif /* TAO_HTTP_HANDLER_H */