isapimagick.c

下载来的一个看图软件的源代码

        string++;
      }
  }
  *target = '\0'; /* Terminate target string */
  return (result);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  C G I T o A r g v                                                          %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method CGIToArgv converts a text string passed as part of a CGI request
%  into command line arguments.
%
%  The format of the CGIToArgv method is:
%
%      char **CGIToArgv(const char *text,int *argc,char ***argv)
%
%  A description of each parameter follows:
%
%    o text:  Specifies the string to segment into a list.
%
%    o argc:  This integer pointer returns the number of arguments in the
%             list.
%
%    o argv:  This array of pointers returns the string list unless an error
%             occurs, otherwise NULL.
%
*/
#define IsCGIDelimiter(c)  (((c) == '&') || ((c) == '=') || ((c) == '\0'))

unsigned int CGIToArgv(const char *text,int *argc,char ***argv)
{
  char
    **vector;

  const char
    *p,
    *q;

  register int
    i;

  int
    count;

  if (text == (char *) NULL)
    return(False);
  /*
    Determine the number of arguments by scanning for delimiters
  */
  q=text;
  count=0;
  while (1)
  {
    int
      len;

    p=q;
    while (!IsCGIDelimiter(*q))
      q++;
    len=q-p;
    if (len > 0)
      count++;
    if (*q == '\0')
      break;
    q++;
  }
  vector=(char **) AcquireMemory((count+2)*sizeof(char *));
  if (vector == (char **) NULL)
    {
      MagickError(ResourceLimitError,"Unable to convert string to argv",
        "Memory allocation failed");
      return(False);
    }
  /*
    Convert string to an ASCII list.
  */
  vector[0]=AllocateString("isapimagick");
  vector[count+1]=(char *) NULL;
  q=text;
  i=1;
  while (i <= count)
  {
    int
      len;

    p=q;
    while (!IsCGIDelimiter(*q))
      q++;
    /*
       Skip an zero length tokens. This typically happens for the case
       of xxx=& on a CGI GET or POST were the name value pair has no
       value
    */
    len=q-p;
    if (len > 0)
      {
        vector[i]=(char *) AcquireMemory(q-p+1);
        if (vector[i] == (char *) NULL)
          {
            MagickError(ResourceLimitError,"Unable to convert string to argv",
              "Memory allocation failed");
            return(False);
          }
        (void) strncpy(vector[i],p,q-p);
        vector[i][q-p]='\0';
        /*
          Convert any special HTML codes in place back to ASCII
        */
        HttpUnescape(vector[i], (char *) NULL);
        i++;
      }
    q++;
  }
  *argc=count+1;
  *argv=vector;
  return(True);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  G e t F i l e M i m e T y p e                                              %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method GetFileMimeType given the file name, obtain MIME type for
%  "Content-type:" header field. We try to find MIME type string under
%  HCR\.xyz key, "Content Type" value. If that fails, we return default
%  "application/ocetet-stream".
%
%  The format of the GetFileMimeType method is:
%
%      void GetFileMimeType(LPCSTR pszPath, LPSTR pszType, DWORD cbMax)
%
%  A description of each parameter follows:
%
%    o pszPath:  file path
%
%    o pszType:  points to the buffer that will receive MIME type string
%
%    o cbMax:    specifies the maximum number of characters to copy to the
%                buffer, including the NUL character. If the text exceeds
%                this limit, it will be truncated.
%
*/
typedef struct _mime_spec
{
  char
    *extn,
    *type;
} mime_spec;

static mime_spec specs[] = {
  ".", "text/plain",
  ".htm", "text/html",
  ".html", "text/html",
  ".txt", "text/plain",
  ".gif", "image/gif",
  ".jpe", "image/jpeg",
  ".jpeg", "image/jpeg",
  ".jpg", "image/jpeg",
  ".pbm", "image/x-portable-bitmap",
  ".pgm", "image/x-portable-graymap",
  ".png", "image/png",
  ".pnm", "image/x-portable-anymap",
  ".ppm", "image/x-portable-pixmap",
  ".ras", "image/x-cmu-raster",
  ".rgb", "image/x-rgb",
  ".tif", "image/tiff",
  ".tiff", "image/tiff",
  ".xbm", "image/x-xbitmap",
  ".xpm", "image/x-xpixmap",
  ".xwd", "image/x-xwindowdump",
  ".avi", "video/msvideo",
  ".mov", "video/quicktime",
  ".mpe", "video/mpeg",
  ".mpeg", "video/mpeg",
  ".mpg", "video/mpeg",
  ".mp3", "audio/mpeg",
  ".wav", "audio/wav",
  ".bin", "application/octet-stream",
  ".eps", "application/postscript",
  ".exe", "application/octet-stream",
  ".gtar", "application/x-gtar",
  ".gz", "application/x-gzip",
  ".hdf", "application/x-hdf",
  ".jar", "application/java-archive",
  ".lzh", "application/x-lzh",
  ".pdf", "application/pdf",
  ".ps", "application/postscript",
  ".tar", "application/tar",
  ".tgz", "application/x-gzip",
  ".zip", "application/zip"
};

void GetFileMimeType(const char *pszPath, char *pszType, unsigned long cbMax)
{
  char
    *pszExt;

  /*
    set MIME type to empty string
  */
  *pszType = '\0';
  /*
    try to locate file extension
  */
  pszExt = strrchr( pszPath, '.');    
  if (pszExt != NULL)
    {
#ifdef USE_REGISTRY   
      HKEY
        hKey;

      unsigned long
        value_type;

      long
        result;

      /* 
        for file extension .xyz, MIME Type can be found
        HKEY_CLASSES_ROOT\.xyz key in the registry
      */
      result = RegOpenKeyEx(HKEY_CLASSES_ROOT,pszExt,0L,KEY_READ,&hKey);                     
      if (result == ERROR_SUCCESS)
        {
          /*
            we sucessfully opened the key.
            try getting the "Content Type" value
          */            
          result = RegQueryValueEx(hKey,"Content Type",NULL,&value_type, 
	                   (BYTE *)pszType,&cbMax);
          /*
            if we failed to get the value or it is not string,
            clear content-type field
          */            
          if (result != ERROR_SUCCESS || value_type != REG_SZ)
              *pszType = '\0';
          RegCloseKey( hKey );
        }
#else
      int
        i,
        tagcount = sizeof(specs) / sizeof(mime_spec);

      /* try to match this record to one of the ones in our named table */
      for (i=0; i< tagcount; i++)
      {
        if (LocaleCompare(specs[i].extn,pszExt) == 0)
          strncpy(pszType, specs[i].type, cbMax);
      }
#endif
    }    
  /*
    if at this point we don't have MIME type, use default
  */    
  if (*pszType == '\0')
    strncpy(pszType, "application/octet_stream", cbMax);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  H t t p E x t e n s i o n P r o c                                          %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  HttpExtensionProc - ISAPI / Win32 API method. This method is
%  required by IIS.  It is called once per client request. This
%  is where the extension accomplishes its purpose in life. See
%  Microsofts ISAPI API documentation for all the gory details.
%
*/
DWORD WINAPI HttpExtensionProc(EXTENSION_CONTROL_BLOCK *pECB)
{
  char
    **argv,
    **argv_hw,
    *errmsg;

  int
    argc,
    argc_hw,
    i;

  unsigned int
    impersonating,
    status;

  CHAR