ACE/apps/JAWS2/JAWS/Parse_Headers.h

   1 /* -*- c++ -*- */
   2 #ifndef JAWS_PARSE_HEADERS_H
   3 #define JAWS_PARSE_HEADERS_H
   4
   5 #include "JAWS/Export.h"
   6 #include "ace/Singleton.h"
   7
   8 #if !defined (ACE_LACKS_PRAGMA_ONCE)
   9 # pragma once
  10 #endif /* ACE_LACKS_PRAGMA_ONCE */
  11
  12 #include "ace/Message_Block.h"
  13 #include "ace/Synch_Traits.h"
  14
  15 #include "Headers.h"
  16
  17 class JAWS_Export JAWS_Header_Info
  18 {
  19 public:
  20   JAWS_Header_Info ();
  21   ~JAWS_Header_Info ();
  22
  23   int end_of_line () const;
  24   void end_of_line (int flag);
  25
  26   const char *last_header_name () const;
  27
  28   int last_header_length () const;
  29   void last_header_length (int len);
  30
  31   const JAWS_Header_Data * last_header_data () const;
  32
  33   char *header_buf ();
  34
  35   void append_last_header_value (char c);
  36   int append_last_header_value ();
  37   void append_last_header_value (const char *begin, const char *end);
  38   void reduce_last_header_value ();
  39
  40   void create_next_header_value (char *ht);
  41   // This will insert last_header_data into the table if it is not
  42   // null.  Then, it will create a new header_data node and populate
  43   // it.  If ht is null, last_header_data is not inserted.
  44
  45   void finish_last_header_value ();
  46   // This will insert last_header_data into the table if it is not
  47   // null.
  48
  49   int end_of_headers () const;
  50   void end_of_headers (int flag);
  51
  52   int status () const;
  53   void status (int s);
  54
  55   JAWS_Headers *table ();
  56
  57   enum STATUS_CODE
  58   {
  59     STATUS_CODE_OK = 0,
  60     STATUS_CODE_NO_MEMORY,
  61     STATUS_CODE_TOO_LONG
  62   };
  63
  64   enum
  65   {
  66     MAX_HEADER_LENGTH = 8192
  67   };
  68   // Note that RFC 822 does not mention the maximum length of a header
  69   // line.  So in theory, there is no maximum length.
  70   // In Apache, they assume that each header line should not exceed
  71   // 8K.  Who am I to disagree?
  72
  73   void dump ();
  74
  75 private:
  76   int end_of_headers_;
  77   int end_of_line_;
  78
  79   JAWS_Header_Data *last_header_data_;
  80
  81   int last_header_length_;
  82   int status_;
  83
  84   char header_buf_[MAX_HEADER_LENGTH];
  85   JAWS_Headers table_;
  86 };
  87
  88 class JAWS_Export JAWS_Parse_Headers
  89 {
  90 public:
  91   int parse_headers (JAWS_Header_Info *info, ACE_Message_Block &mb);
  92   // Return 0 means need more data, and call it again.
  93   // Return 1 means all done or error.
  94
  95   int parse_header_name (JAWS_Header_Info *info, ACE_Message_Block &mb);
  96   // Return 0 means reiterate on remaining input.
  97   // Return 1 means input has ended (either because it ended
  98   // prematurely, or that there are no more headers).
  99
 100   int parse_header_value (JAWS_Header_Info *info, ACE_Message_Block &mb);
 101   // Return 0 means reiterate on remaining input.
 102   // Return 1 means input has ended or that an error has occurred.
 103
 104   char * skipset (const char *set, char *start, char *end);
 105   // Scans from start to end for characters that match skip set.
 106   // Returns pointer to first location between start and end of a
 107   // character that is in the skip set.
 108
 109   char * skipcset (const char *set, char *start, char *end);
 110   // Scans from start to end for characters that match skip set.
 111   // Returns pointer to first location between start and end of a
 112   // character that is *not* in the skip set.
 113 };
 114
 115 typedef ACE_Singleton<JAWS_Parse_Headers, ACE_SYNCH_MUTEX> JAWS_Parse_Headers_Singleton;
 116
 117 #endif /* !defined (JAWS_PARSE_HEADERS_H) */