httputils.cpp

OSB-PIK-OpenVXI-3.0.0源代码 “中国XML论坛 - 专业的XML技术讨论区--XML在语音技术中的应用”

 /****************License************************************************
  *
  * Copyright 2000-2003.  ScanSoft, Inc.    
  *
  * Use of this software is subject to notices and obligations set forth 
  * in the SpeechWorks Public License - Software Version 1.2 which is 
  * included with this software. 
  *
  * ScanSoft is a registered trademark of ScanSoft, Inc., and OpenSpeech, 
  * SpeechWorks and the SpeechWorks logo are registered trademarks or 
  * trademarks of SpeechWorks International, Inc. in the United States 
  * and other countries.
  *
  ***********************************************************************/
 

 #include "SBinetString.hpp"
 #include "HttpUtils.hpp"
 #include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 #include "ap_ctype.h"
 
 #ifdef WIN32
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <stdlib.h>
 #else
 #include <time.h>
 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/times.h>
 #include <unistd.h>
 #include <sys/select.h>
 #endif
 
 
 static void escapeDataIntern(const VXIbyte *data,
                              VXIulong size,
                              SBinetHttpUtils::HttpUriEncoding mask,
                              SBinetNString &result)
 {
   /*
    *	Bit 0		xalpha
    *	Bit 1		xpalpha		-- as xalpha but with plus.
    *	Bit 2 ...	path		-- as xpalpha but with /
    */
   static const VXIbyte isAcceptable[96] =
     /*0x0 0x1 0x2 0x3 0x4 0x5 0x6 0x7 0x8 0x9 0xA 0xB 0xC 0xD 0xE 0xF */
   {
     0x0,0x0,0x0,0x0,0x0,0xE,0x0,0x0,0x0,0x0,0xF,0xE,0x0,0xF,0xF,0xC, /* 2x  !"#$%&'()*+,-./   */
     0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0x8,0x0,0x0,0x0,0x0,0x0, /* 3x 0123456789:;<=>?   */
     0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF, /* 4x @ABCDEFGHIJKLMNO   */
     0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0x0,0x0,0x0,0x0,0xF, /* 5X PQRSTUVWXYZ[\]^_   */
     0x0,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF, /* 6x `abcdefghijklmno   */
     0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0xF,0x0,0x0,0x0,0x0,0x0  /* 7X pqrstuvwxyz{\}~DEL */
   };
 
   static const char *hexChar = "0123456789ABCDEF";
 
   // Now perform the actual conversion
   const VXIbyte *p;
   VXIulong i;
   for (i = 0, p = data; i < size; i++, p++)
   {
     VXIbyte a = *p;
     if (a < 32 || a >= 128 || !(isAcceptable[a-32] & mask))
     {
       result += '%';
       result += hexChar[a >> 4];
       result += hexChar[a & 15];
     }
     else
       result += static_cast<char>(*p);
   }
 }
 
 void SBinetHttpUtils::escapeString(const char *str, HttpUriEncoding mask, SBinetNString &result)
 {
   result.clear();
 
   if (str == NULL) return;
 
   escapeDataIntern((const VXIbyte *) str, strlen(str), mask, result);
 }
 
 
 void SBinetHttpUtils::escapeData(const void *data,
                                  const int size,
                                  HttpUriEncoding mask,
                                  SBinetNString& result)
 {
   result.clear();
   if (data == NULL) return;
   escapeDataIntern((const VXIbyte *) data, size, mask, result);
 }
 
 
 void SBinetHttpUtils::utf8encode(const VXIchar *str, SBinetNString& result)
 {
   result.clear();
 
   if (str == NULL) return;
 
   //  firstByteMark
   //      A list of values to mask onto the first byte of an encoded sequence,
   //      indexed by the number of bytes used to create the sequence.
   static const char firstByteMark[7] = {  char(0x00), char(0x00), char(0xC0), char(0xE0),
                                           char(0xF0), char(0xF8), char(0xFC) };
 
   for (const VXIchar *p = str; *p; p++)
   {
     VXIchar c = *p;
 
     if (c >= 0xD800 && c <= 0xDBFF)
       break;
 
     unsigned int encodedBytes;
     if (c < 0x80)
       encodedBytes = 1;
     else if (c < 0x800)
       encodedBytes = 2;
     else if (c < 0x10000)
       encodedBytes = 3;
     else if (c < 0x200000)
       encodedBytes = 4;
     else if (c < 0x4000000)
       encodedBytes = 5;
     else if (c <= 0x7FFFFFFF)
       encodedBytes = 6;
     else
     {
       result.clear();
       break;
     }
 
     //  And spit out the bytes. We spit them out in reverse order
     //  here, so bump up the output pointer and work down as we go.
     char buffer[7] = { 0, 0, 0, 0, 0, 0, 0 };
 
     char * outPtr = buffer + encodedBytes;
     switch (encodedBytes)
     {
      case 6 :
        *--outPtr = char((c | 0x80) & 0xBF);
       c >>= 6;
      case 5 :
        *--outPtr = char((c | 0x80) & 0xBF);
       c >>= 6;
      case 4 :
        *--outPtr = char((c | 0x80) & 0xBF);
       c >>= 6;
      case 3 :
        *--outPtr = char((c | 0x80) & 0xBF);
       c >>= 6;
      case 2 :
        *--outPtr = char((c | 0x80) & 0xBF);
       c >>= 6;
      case 1 :
        *--outPtr = char(c | firstByteMark[encodedBytes]);
     }
 
     for (int i = 0; buffer[i] != 0; i++)
       result += buffer[i];
   }
 }
 const char *SBinetHttpUtils::getToken(const char *str, SBinetNString& token)
 {
   static const char *tspecials = "()<>@,;:\\\"/[]?={} \t";
 
   const char *beg = str;
 
   while (*beg && ap_isspace(*beg)) beg++;
   if (!*beg) return NULL;
 
   const char *end = beg;
 
   while (*end && !strchr(tspecials, *end) && !ap_iscntrl(*end)) end++;
   if (end == beg)
   {
     return NULL;
   }
 
   token.clear();
   token.append(beg, end - beg);
   return end;
 }
 
 const char *SBinetHttpUtils::getQuotedString(const char *str,
 					     SBinetNString& value)
 {
   // skip leading '"'
   ++str;
   value.clear();
 
   while (*str && *str != '"')
   {
     switch (*str)
     {
      case '\\':
        str++;
        if (*str) value += *str;
        break;
      default:
        value += *str;
        break;
     }
     str++;
   }
 
   if (*str == '"')
     return ++str;
 
   return NULL;
 }
 
 const char *SBinetHttpUtils::getValue(const char *str, SBinetNString& value)
 {
   const char *beg = str;
   while (*beg && ap_isspace(*beg)) beg++;
   if (!*beg) return NULL;
 
   if (*beg == '"')
   {
     return getQuotedString(beg, value);
   }
   else
   {
     return getToken(beg, value);
   }
 }
 
 const char *SBinetHttpUtils::getCookieValue(const char *str,
 					    SBinetNString& value)
 {
   const char *beg = str;
   while (*beg && ap_isspace(*beg)) beg++;
   if (!*beg) return NULL;
 
   if (*beg == '"')
   {
     return getQuotedString(beg, value);
   }
   else
   {
     // The specification says that a value is either a token or a quoted
     // string.  However, a lot of broken servers just don't quote string
     // containing blanks.  We have to include everything up to the semicolon.
 #ifdef NO_BROKEN_SERVER
     return getToken(beg, value);
 #else
     while (*beg && ap_isspace(*beg)) beg++;
     if (!*beg) return NULL;
     const char *end = beg;
     while (*end && *end != ';')
     {
       // some really broken servers even put a comma in the value.  In this
       // case, we scan the string to find the first occurence of a semi-colon
       // or an equal sign.  If we find the semi-colon first, we assume that
       // the comma is part of the value and the value terminates at the
       // semi-colon location.  Otherwise, the value terminates with the comma.
       if (*end == ',')
       {
         const char *orig_end = end;
         while (*end && *end != ';' && *end != '=') end++;
         if (*end == '=') end = orig_end;
         break;
       }
       end++;
     }
 
     // removing trailing blanks.
     const char *lastChar = end - 1;
     while (lastChar >= beg && ap_isspace(*lastChar)) lastChar--;
     lastChar++;
 
     value.clear();
     value.append(beg, lastChar - beg);
     return end;
 #endif
   }
 }
 
 const char *SBinetHttpUtils::expectChar(const char *start, const char *delim)
 {
   while (*start && ap_isspace(*start)) start++;
 
   if (!*start || strchr(delim, *start))
     return start;
 
   return NULL;
 }
 
 
 // Sleep with a duration in microseconds
 void SBinetHttpUtils::usleep(unsigned long microsecs)
 {
 #ifdef WIN32
   Sleep (microsecs / 1000);
 #else
   fd_set fdset;
   struct timeval timeout;
 
   FD_ZERO(&fdset);
   timeout.tv_sec = microsecs / 1000000;
   timeout.tv_usec = microsecs % 1000000;
   select(0, &fdset, &fdset, &fdset, &timeout);
 #endif
 }
 
 
 // Case insensitive compare
 int SBinetHttpUtils::casecmp(const wchar_t *s1, const wchar_t *s2)
 {
   register unsigned int u1, u2;
 
   for (;;) {
     u1 = (unsigned int) *s1++;
     u2 = (unsigned int) *s2++;
     if (toUpper(u1) != toUpper(u2)) {
       return toUpper(u1) - toUpper(u2);
     }
     if (u1 == '\0') {
       break;
     }
   }
 
   return 0;
 }
 
 
 int SBinetHttpUtils::casecmp(const wchar_t *s1, const wchar_t *s2,
 			     register size_t n)
 {
   register unsigned int u1, u2;
 
   for (; n != 0; --n) {
     u1 = (unsigned int) *s1++;
     u2 = (unsigned int) *s2++;
     if (toUpper(u1) != toUpper(u2)) {
       return toUpper(u1) - toUpper(u2);
     }
     if (u1 == '\0') {
       break;
     }
   }
 
   return 0;
 }