prozilla/libprozilla/src/ftpparse.c

/******************************************************************************
   libprozilla - a download accelerator library
   Copyright (C) 2001 Kalum Somaratna

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
******************************************************************************/

//Rewrite of the ftp parsing code as we needed to extract the date of
//the file to save it when the downloading is complete.


#include "common.h"
#include "ftpparse.h"
#include "prozilla.h"




/* MultiNet (some spaces removed from examples) */
/* "00README.TXT;1      2 30-DEC-1996 17:44 [SYSTEM] (RWED,RWED,RE,RE)" */
/* "CORE.DIR;1          1  8-SEP-1996 16:09 [SYSTEM] (RWE,RWE,RE,RE)" */
/* and non-MutliNet VMS: */
/* "CII-MANUAL.TEX;1  213/216  29-JAN-1996 03:33:12  [ANONYMOU,ANONYMOUS]   (RWED,RWED,,)" */

/* MSDOS format */
/* 04-27-00  09:09PM       <DIR>          licensed */
/* 07-18-00  10:16AM       <DIR>          pub */
/* 04-14-00  03:47PM                  589 readme.htm */



long getlong(char *buf, int len)
{
  long u = 0;

  while (len-- > 0)
    u = u * 10 + (*buf++ - '0');
  return u;
}


/*	Find next Field
**	---------------
**	Finds the next RFC822 token in a string
**	On entry,
**	*pstr	points to a string containing a word separated
**		by white white space "," ";" or "=". The word
**		can optionally be quoted using <"> or "<" ">"
**		Comments surrrounded by '(' ')' are filtered out
**
**      On exit,
**	*pstr	has been moved to the first delimiter past the
**		field
**		THE STRING HAS BEEN MUTILATED by a 0 terminator
**
**	Returns	a pointer to the first word or NULL on error
*/
char * get_nextfield(char ** pstr)
{
  char * p = *pstr;

  char * start = NULL;

  if (!pstr || !*pstr)
    return NULL;
  while (1)
    {
      /* Strip white space and other delimiters */
      while (*p && (isspace((int)*p) || *p == ',' || *p == ';' || *p == '='))
        p++;
      if (!*p)
        {
          *pstr = p;
          return NULL;                                           /* No field */
        }

      if (*p == '"')                                         /* quoted field */
        {
          start = ++p;
          for (; *p && *p != '"'; p++)
            if (*p == '\\' && *(p + 1))
              p++;
          /* Skip escaped chars */
          break;                            /* kr95-10-9: needs to stop here */
        }
      else if (*p == '<')                                    /* quoted field */
        {
          start = ++p;
          for (; *p && *p != '>'; p++)
            if (*p == '\\' && *(p + 1))
              p++;
          /* Skip escaped chars */
          break;                            /* kr95-10-9: needs to stop here */
        }
      else if (*p == '(')                                         /* Comment */
        {
          for (; *p && *p != ')'; p++)
            if (*p == '\\' && *(p + 1))
              p++;
          /* Skip escaped chars */
          p++;
        }
      else                                                    /* Spool field */
        {
          start = p;
          while (*p && !isspace((int)*p) && *p != ',' && *p != ';' && *p != '=')
            p++;
          break;                                                   /* Got it */
        }
    }
  if (*p)
    *p++ = '\0';
  *pstr = p;
  return start;
}



uerr_t ftp_parse(ftpparse *fp, char *buf, int len)
{
  char *cp;
  char *token;
  char *ptr;
  char *date;
  int i;

  fp->filename = 0;
  fp->namelen = 0;
  //  fp->flagtrycwd = 0;
  // fp->flagtryretr = 0;
  //fp->sizetype = FTPPARSE_SIZE_UNKNOWN;
  fp->filesize = 0;
  //  fp->mtimetype = FTPPARSE_MTIME_UNKNOWN;
  fp->mtime = 0;
  // fp->idtype = FTPPARSE_ID_UNKNOWN;
  fp->id = 0;
  // fp->idlen = 0;

  proz_debug("FTP LIST to be parsed is %s", cp = strdup(buf));
  free(cp);

  if (len < 2) /* an empty name in EPLF, with no info, could be 2 chars */
    return FTPPARSENOTEXIST;

  switch (*buf)
    {
    case 'b':
    case 'c':
    case 'd':
    case 'l':
    case 'p':
    case 's':
    case '-':
      /* UNIX-style listing, without inum and without blocks */
      /* "-rw-r--r--   1 root     other        531 Jan 29 03:26 README" */
      /* "dr-xr-xr-x   2 root     other        512 Apr  8  1994 etc" */
      /* "dr-xr-xr-x   2 root     512 Apr  8  1994 etc" */
      /* "lrwxrwxrwx   1 root     other          7 Jan 25 00:17 bin -> usr/bin" */
      /* Also produced by Microsoft's FTP servers for Windows: */
      /* "----------   1 owner    group         1803128 Jul 10 10:18 ls-lR.Z" */
      /* "d---------   1 owner    group               0 May  9 19:45 Softlib" */
      /* Also WFTPD for MSDOS: */
      /* "-rwxrwxrwx   1 noone    nogroup      322 Aug 19  1996 message.ftp" */
      /* Also NetWare: */
      /* "d [R----F--] supervisor            512       Jan 16 18:53    login" */
      /* "- [R----F--] rhesus             214059       Oct 20 15:27    cx.exe" */
      /* Also NetPresenz for the Mac: */
      /* "-------r--         326  1391972  1392298 Nov 22  1995 MegaPhone.sit" */
      /* "drwxrwxr-x               folder        2 May 10  1996 network"
       */

      if (*buf == 'd')
        fp->filetype = DIRECTORY;
      if (*buf == '-')
        fp->filetype = DIRECTORY;
      if (*buf == 'l')
        fp->filetype = SYMBOLIC_LINK;
      ptr = cp = strdup(buf);

      for (i = 0; i < 4; i++)
        {
          //add checking
          token = get_nextfield(&cp);
          if (token == NULL) //failed to parse
            return FTPPARSEFAIL;
        }
      /*
      ** This field can either be group or size. We find out by looking at the
      ** next field. If this is a non-digit then this field is the size.
      */
      while (*cp && isspace((int)*cp))
        cp++;
      if (isdigit((int)*cp))
        {
          token = get_nextfield(&cp);
          while (*cp && isspace((int)*cp))
            cp++;
        }
      //if it is a filename
      fp->filesize = strtol(token, NULL, 10);
      proz_debug("FTP file size is %ld", fp->filesize);


      while (*cp && isspace((int)*cp))
        cp++;
      assert(cp + 12 < ptr + len);
      date = cp;
      cp += 12;
      *cp++ = '\0';
      fp->date_str = strdup(date);

      proz_debug("LIST date is %s", fp->date_str);

      return FTPPARSEOK;

    default:
      return FTPPARSEFAIL;
    }
}




time_t parse_time(const char * str)
{
  char * p;
  struct tm tm;
  time_t t;

  if (!str)
    return 0;

  if ((p = strchr(str, ',')))
    {
    }

  return 0;
}