ACE/apps/JAWS/clients/Caching/http_handler.h

   1 /* -*- c++ -*- */
   2
   3 //=============================================================================
   4 /**
   5  *  @file    http_handler.h
   6  *
   7  *  @author James Hu
   8  */
   9 //=============================================================================
  10
  11
  12 #include "ace/SOCK_Connector.h"
  13
  14 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  15 # pragma once
  16 #endif /* ACE_LACKS_PRAGMA_ONCE */
  17
  18 #include "ace/Connector.h"
  19 #include "ace/Svc_Handler.h"
  20
  21 /**
  22  * @class HTTP_Handler
  23  *
  24  * @brief A simple HTTP protocol handler for clients.
  25  *
  26  * Checks to see if the requested file is already cached.  If
  27  * so, it says so.  If not, the request is issued to the
  28  * connection.  The fetched file is cached.
  29  */
  30 class HTTP_Handler : public ACE_Svc_Handler<ACE_SOCK_STREAM, ACE_NULL_SYNCH>
  31 {
  32 public:
  33   HTTP_Handler ();
  34   HTTP_Handler (const char * path);
  35
  36   /// Open hook.
  37   virtual int open (void *);
  38
  39   /// Entry points defined by the abstract Svc_Handler.
  40   virtual int svc ();
  41
  42   /// Accessor to the file being fetched.
  43   const char *filename () const;
  44
  45 private:
  46   char request_[BUFSIZ];
  47   size_t request_size_;
  48
  49   char filename_[BUFSIZ];
  50   size_t response_size_;
  51 };
  52
  53 /**
  54  * @class HTTP_Connector
  55  *
  56  * @brief A simple HTTP connector.
  57  *
  58  * Creates an HTTP Handler based on the URL, and then delegates
  59  * to to the SOCK_CONNECTOR.  Adapter pattern.
  60  */
  61 class HTTP_Connector
  62 {
  63 public:
  64   /// User entry point into the HTTP connector.
  65   int connect (const char * url);
  66
  67 private:
  68   /// Helper function.
  69   int parseurl (const char *url,
  70                 char *host,
  71                 u_short *port,
  72                 char *path);
  73
  74 private:
  75   /// Factory that actively establishes a connection with an HTTP
  76   /// server.
  77   ACE_Connector<HTTP_Handler, ACE_SOCK_CONNECTOR> connector_;
  78 };