cgimagick.c

下载来的一个看图软件的源代码

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                             C G I M A G I C K                               %
%                                                                             %
%                                                                             %
%        A shim layer to give command line utilities a CGI interface.         %
%                                                                             %
%                                                                             %
%                                                                             %
%                              Software Design                                %
%                           William T. Radcliffe                              %
%                                June 2001                                    %
%                                                                             %
%                                                                             %
%  Copyright (C) 2001 ImageMagick Studio, a non-profit organization dedicated %
%  to making software imaging solutions freely available.                     %
%                                                                             %
%  Permission is hereby granted, free of charge, to any person obtaining a    %
%  copy of this software and associated documentation files ("ImageMagick"),  %
%  to deal in ImageMagick without restriction, including without limitation   %
%  the rights to use, copy, modify, merge, publish, distribute, sublicense,   %
%  and/or sell copies of ImageMagick, and to permit persons to whom the       %
%  ImageMagick is furnished to do so, subject to the following conditions:    %
%                                                                             %
%  The above copyright notice and this permission notice shall be included in %
%  all copies or substantial portions of ImageMagick.                         %
%                                                                             %
%  The software is provided "as is", without warranty of any kind, express or %
%  implied, including but not limited to the warranties of merchantability,   %
%  fitness for a particular purpose and noninfringement.  In no event shall   %
%  ImageMagick Studio be liable for any claim, damages or other liability,    %
%  whether in an action of contract, tort or otherwise, arising from, out of  %
%  or in connection with ImageMagick or the use or other dealings in          %
%  ImageMagick.                                                               %
%                                                                             %
%  Except as contained in this notice, the name of the ImageMagick Studio     %
%  shall not be used in advertising or otherwise to promote the sale, use or  %
%  other dealings in ImageMagick without prior written authorization from the %
%  ImageMagick Studio.                                                        %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  This is a simple shim that provides a CGI layer for calling into any of the
%  normal command line utilities.
*/

/*
  Include declarations.
*/
#include "magick/magick.h"
#include "magick/define.h"
/*
  Include the convert mainline as a subroutine
*/
#define Usage convert_Usage
#define main convert_main
#include "utilities\convert.c"
#undef Usage
#undef main
/*
  Include the combine mainline as a subroutine
*/
#define Usage combine_Usage
#define main combine_main
#include "utilities\composite.c"
#undef Usage
#undef main

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  C G I F i f o                                                              %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method CGIFifo is the default output stream handler for CGI usage. It is
%  called by the stream subsystem whenever a buffer of data needs to be sent
%  to the output.It receives a pointer to the image as well as the buffer
%  of data and its length.
%
%  The format of the HttpUnescape method is:
%
%      int CGIFifo(const Image *image,const void *data,const size_t length)
%
%  A description of each parameter follows:
%
%    o image:  A pointer to the image being sent to the output stream.
%
%    o data: A pointer to the buffer of data to be sent.
%
%    o length: The length of the buffer of data to be sent.
%
*/
int CGIFifo(const Image *image,const void *data,const size_t length)
{
  fwrite(data,1,length,stdout);
  return(length);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  D e c o d e H e x                                                          %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method DecodeHex decodes a hexadecimal string. It stops after outmax
%  characters or when an invalid hex character is reached. It also sets
%  the input pointer to the first unprocessed character.  Returns the
%  the result as a binary number.
%
%  The format of the HttpUnescape method is:
%
%      int DecodeHex(const char **input,size_t outmax)
%
%  A description of each parameter follows:
%
%    o input:  Specifies the string to be converted.
%
%    o outmax: Specifies the maximum number of characters to process.
%
*/
int DecodeHex(const char **input,size_t outmax)
{
  static char
    hex_to_bin [128] = {
      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,    /*            */
      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,    /*            */
      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,    /*            */
       0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1,    /*   0..9     */
      -1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,    /*   A..F     */
      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,    /*            */
      -1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,    /*   a..f     */
      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 };  /*            */

  int
    nextch;

  size_t
    index,
    result;

  assert(input != (const char **) NULL);
  assert((*input) != (const char *) NULL);

  index  = 0;
  result = 0;
  while (outmax == 0 || index < outmax)
  {
    nextch = (*input) [index] & 127;
    if (nextch && hex_to_bin [nextch] != -1)
    {
      result = result * 16 + hex_to_bin [nextch];
      index++;
    }
    else
      break;
  }
  (*input) += index;
  return (result);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  H t t p U n e s c a p e                                                    %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method HttpUnescape removes HTTP escaping from a string. If the result
%  string is NULL, it modifies the source string in place, else fills-in
%  the result string. This method returns the resulting string. End-of-line
%  sequences (%0A%0D) are stored as a single new-line character, i.e.
%  carriage-returns (%0D) are not stored.
%
%  The format of the HttpUnescape method is:
%
%      char *HttpUnescape(char *string,char *result)
%
%  A description of each parameter follows:
%
%    o string:  Specifies the string to be converted.
%
%    o result:  Specifies the destination for the converted result. A NULL
%               indicates that the conversion happens "in-place".
%
*/
char *HttpUnescape(char *string,char *result)
{
  char
    *target; /* Where we store the result */

  assert(string != (char *) NULL);
  if (!result) /* If result string is null, */
    result = string; /* modify in place */
  target = result;

  while (*string)
  {
    if (*string == '%'  /* Unescape %xx sequence */
          && isxdigit((int) string [1]) && isxdigit((int) string [2]))
      {
        string++;
        *target = DecodeHex ((const char **) &string, 2);
        if (*target != '\r')
          target++; /* We do not store CR's */
      }
    else
      {
        if (*string == '+') /* Spaces are escaped as '+' */
          *target++ = ' ';
        else
          *target++ = *string; /* Otherwise just copy */

        string++;
      }
  }
  *target = '\0'; /* Terminate target string */
  return (result);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  C G I G e t I n p u t                                                      %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method CGIGetInput returns the result of a CGI GET or POST request to the
%  caller as a simple string buffer.
%
%  The format of the CGIGetInput method is:
%
%      char *CGIGetInput(CGIAccessType method)
%
%  A description of each parameter follows:
%
%    o method:  Specifies the type of access to look for. This can be GET,
%               POST, or both (the most typical).
%
*/

typedef enum
{
  CGI_GET,
  CGI_POST,
  CGI_ANY
} CGIAccessType;

char *CGIGetInput(CGIAccessType iMethod)
{
  char
    *strHead,
    *strRetBuf;

  int
    iStdinLen = 0,
    iMethodWas = 0;

  if (iMethod == CGI_POST || iMethod == CGI_ANY)
    {
      if (getenv ("CONTENT_LENGTH"))
        {
          iStdinLen = atoi (getenv ("CONTENT_LENGTH"));
          iMethodWas = CGI_POST;
        }
    }
  if (iMethod == CGI_GET || (iMethod == CGI_ANY && !iStdinLen))
    {
      if (getenv ("QUERY_STRING"))
        {
          iStdinLen = strlen (getenv ("QUERY_STRING"));
          iMethodWas = CGI_GET;
        }
    }
  if (!iStdinLen)
      return (NULL);

  strHead = strRetBuf = (char *) AcquireMemory(sizeof (char) * iStdinLen + 1);
  if (strHead == (char *) NULL)
      return (NULL);

  memset (strRetBuf, 0, iStdinLen + 1);
  if (iMethodWas == CGI_POST)
    {
#ifdef WIN32
			setmode(fileno(stdin), O_BINARY);
#endif
      fread (strRetBuf, sizeof (char), iStdinLen, stdin);
    }
  else
    strncpy (strRetBuf, getenv ("QUERY_STRING"), (iStdinLen + 1));

  return (*strHead? strHead: NULL);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  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)