main.c

/***************************************************************************
 *                                  _   _ ____  _     
 *  Project                     ___| | | |  _ \| |    
 *                             / __| | | | |_) | |    
 *                            | (__| |_| |  _ <| |___ 
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2003, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at http://curl.haxx.se/docs/copyright.html.
 * 
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * $Id$
 ***************************************************************************/

/* This is now designed to have its own local setup.h */
#include "setup.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <errno.h>

#include <curl/curl.h>

#define _MPRINTF_REPLACE /* we want curl-functions instead of native ones */
#include <curl/mprintf.h>

#include "urlglob.h"
#include "writeout.h"
#include "getpass.h"
#include "homedir.h"
#ifdef USE_ENVIRONMENT
#include "writeenv.h"
#endif

#define CURLseparator	"--_curl_--"

#if defined(WIN32)&&!defined(__CYGWIN32__)
#include <winsock.h>
#endif

#ifdef TIME_WITH_SYS_TIME
/* We can include both fine */
#include <sys/time.h>
#include <time.h>
#else
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#else
# include <time.h>
#endif
#endif


#include "version.h"

#ifdef HAVE_IO_H /* typical win32 habit */
#include <io.h>
#endif

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif

#ifdef HAVE_UTIME_H
#include <utime.h>
#else
#ifdef HAVE_SYS_UTIME_H
#include <sys/utime.h>
#endif

#endif

#ifdef HAVE_SYS_POLL_H
#include <sys/poll.h>
#endif

/* The last #include file should be: */
#ifdef CURLDEBUG
/* This is low-level hard-hacking memory leak tracking and similar. Using
   the library level code from this client-side is ugly, but we do this
   anyway for convenience. */
#include "../lib/memdebug.h"
#endif

#define DEFAULT_MAXREDIRS  50L

#ifdef __DJGPP__
void *xmalloc(size_t);
char *msdosify(char *);
char *rename_if_dos_device_name(char *);
void xfree(void *);
#include <limits.h>
#include <fcntl.h>
struct pollfd {
       int fd;
       int events;     /* in param: what to poll for */
       int revents;    /* out param: what events occured */
     };
int poll (struct pollfd *, int, int);
#endif /* __DJGPP__ */

#ifndef __cplusplus        /* (rabe) */
#ifndef typedef_bool
typedef char bool;
#endif
#endif                     /* (rabe) */

#define CURL_PROGRESS_STATS 0 /* default progress display */
#define CURL_PROGRESS_BAR   1

typedef enum {
  HTTPREQ_UNSPEC,
  HTTPREQ_GET,
  HTTPREQ_HEAD,
  HTTPREQ_POST,
  HTTPREQ_SIMPLEPOST,
  HTTPREQ_CUSTOM,
  HTTPREQ_LAST
} HttpReq;

/* Just a set of bits */
#define CONF_DEFAULT  0

#define CONF_AUTO_REFERER (1<<4) /* the automatic referer-system please! */
#define CONF_VERBOSE  (1<<5) /* talk a lot */
#define CONF_HEADER   (1<<8) /* throw the header out too */
#define CONF_NOPROGRESS (1<<10) /* shut off the progress meter */
#define CONF_NOBODY   (1<<11) /* use HEAD to get http document */
#define CONF_FAILONERROR (1<<12) /* no output on http error codes >= 300 */
#define CONF_FTPLISTONLY (1<<16) /* Use NLST when listing ftp dir */
#define CONF_FTPAPPEND (1<<20) /* Append instead of overwrite on upload! */
#define CONF_NETRC    (1<<22)  /* read user+password from .netrc */
#define CONF_FOLLOWLOCATION (1<<23) /* use Location: Luke! */
#define CONF_GETTEXT  (1<<24) /* use ASCII/text for transfer */
#define CONF_HTTPPOST (1<<25) /* multipart/form-data HTTP POST */

#define CONF_MUTE     (1<<28) /* force NOPROGRESS */

#define CONF_NETRC_OPT (1<<29)  /* read user+password from either
                                 * .netrc or URL*/
#define CONF_UNRESTRICTED_AUTH (1<<30)
/* Send authentication (user+password) when following
 * locations, even when hostname changed */

#ifndef HAVE_STRDUP
/* Ultrix doesn't have strdup(), so make a quick clone: */
char *strdup(char *str)
{
  int len;
  char *newstr;

  len = strlen(str);
  newstr = (char *) malloc((len+1)*sizeof(char));
  if (!newstr)
    return (char *)NULL;

  strcpy(newstr,str);

  return newstr;

}
#endif 

#ifdef WIN32
#include <direct.h>
#define F_OK 0
#define mkdir(x,y) (mkdir)(x)
#endif

#ifdef	VMS
int	vms_show = 0;
#define	FAC_CURL	0xC01
#define	FAC_SYSTEM	0
#define	MSG_NORMAL	0
#define	VMS_STS(c,f,e,s) (((c&0xF)<<28)|((f&0xFFF)<<16)|((e&0x1FFF)<3)|(s&7))
#define	VMSSTS_HIDE	VMS_STS(1,0,0,0)
#define	SEV_WARNING	0
#define	SEV_SUCCESS	1
#define	SEV_ERROR	2
#define	SEV_INFO	3	/* success, with an extra hint */
#define	SEV_FATAL	4
globalvalue int  CURL_UNSUPPROTO;		/* these are from curlmsg.msg file..... */
globalvalue int  CURL_FAILINIT;
globalvalue int  CURL_BADURLSYN;
globalvalue int  CURL_BADURLUSER;
globalvalue int  CURL_BADPROXY;
globalvalue int  CURL_BADHOST;
globalvalue int  CURL_FAILHOST;
globalvalue int  CURL_FTPUNKREPLY;
globalvalue int  CURL_FTPNOACC;
globalvalue int  CURL_FTPUSRPW;
globalvalue int  CURL_FTPBADPASS;
globalvalue int  CURL_FTPBADUSER;
globalvalue int  CURL_FTPBADPASV;
globalvalue int  CURL_FTPBAD227;
globalvalue int  CURL_FTPBADHOST227;
globalvalue int  CURL_FTPNORECONN;
globalvalue int  CURL_FTPNOBIN;
globalvalue int  CURL_PARTIALFILE;
globalvalue int  CURL_FTPNORETR;
globalvalue int  CURL_FTPWRITERR;
globalvalue int  CURL_FTPNOQUOTE;
globalvalue int  CURL_HTTPPNF;
globalvalue int  CURL_WRITERR;
globalvalue int  CURL_BADUSER;
globalvalue int  CURL_FTPNOSTOR;
globalvalue int  CURL_READERR;
globalvalue int  CURL_OUTOFMEM;
globalvalue int  CURL_TIMEOUT;
globalvalue int  CURL_FTPNOASCII;
globalvalue int  CURL_FTPNOPORT;
globalvalue int  CURL_FTPNOREST;
globalvalue int  CURL_FTPNOSIZE;
globalvalue int  CURL_HTTPRNGERR;
globalvalue int  CURL_HTTPPOSTERR;
globalvalue int  CURL_SSLNOCONN;
globalvalue int  CURL_FTPBADRESUME;
globalvalue int  CURL_FILENOACC;
globalvalue int  CURL_LDAPNOBIND;
globalvalue int  CURL_LDAPNOSRCH;
globalvalue int  CURL_LDAPNOLIB;
globalvalue int  CURL_LDAPNOFUNC;
globalvalue int  CURL_ABORTCB;
globalvalue int  CURL_BADPARAM;
globalvalue int  CURL_BADORDER;
globalvalue int  CURL_BADPWD;
globalvalue int  CURL_MNYREDIR;
globalvalue int  CURL_UNKTELNET;
globalvalue int  CURL_UNKMSG;
globalvalue int  CURL_BADSSLCERT;
globalvalue int  CURL_SRVNOERR;
globalvalue int  CURL_MAXMSG;
long	vms_cond[] = {
	VMS_STS(1,FAC_SYSTEM,MSG_NORMAL,SEV_SUCCESS),
	CURL_UNSUPPROTO,		/* these are from curlmsg.msg file..... */
	CURL_FAILINIT,
	CURL_BADURLSYN,
	CURL_BADURLUSER,
	CURL_BADPROXY,
	CURL_BADHOST,
	CURL_FAILHOST,
	CURL_FTPUNKREPLY,
	CURL_FTPNOACC,
	CURL_FTPUSRPW,
	CURL_FTPBADPASS,
	CURL_FTPBADUSER,
	CURL_FTPBADPASV,
	CURL_FTPBAD227,
	CURL_FTPBADHOST227,
	CURL_FTPNORECONN,
	CURL_FTPNOBIN,
	CURL_PARTIALFILE,
	CURL_FTPNORETR,
	CURL_FTPWRITERR,
	CURL_FTPNOQUOTE,
	CURL_HTTPPNF,
	CURL_WRITERR,
	CURL_BADUSER,
	CURL_FTPNOSTOR,
	CURL_READERR,
	CURL_OUTOFMEM,
	CURL_TIMEOUT,
	CURL_FTPNOASCII,
	CURL_FTPNOPORT,
	CURL_FTPNOREST,
	CURL_FTPNOSIZE,
	CURL_HTTPRNGERR,
	CURL_HTTPPOSTERR,
	CURL_SSLNOCONN,
	CURL_FTPBADRESUME,
	CURL_FILENOACC,
	CURL_LDAPNOBIND,
	CURL_LDAPNOSRCH,
	CURL_LDAPNOLIB,
	CURL_LDAPNOFUNC,
	CURL_ABORTCB,
	CURL_BADPARAM,
	CURL_BADORDER,
	CURL_BADPWD,
	CURL_MNYREDIR,
	CURL_UNKTELNET,
	CURL_UNKMSG,
	CURL_BADSSLCERT,
	CURL_SRVNOERR,
	CURL_MAXMSG
};
#endif

extern void hugehelp(void);

/*
 * This is the main global constructor for the app. Call this before
 * _any_ libcurl usage. If this fails, *NO* libcurl functions may be
 * used, or havoc may be the result.
 */
CURLcode main_init(void)
{
  return curl_global_init(CURL_GLOBAL_DEFAULT);
}

/*
 * This is the main global destructor for the app. Call this after
 * _all_ libcurl usage is done.
 */
void main_free(void)
{
  curl_global_cleanup();
}

int SetHTTPrequest(HttpReq req, HttpReq *store)
{
  if((*store == HTTPREQ_UNSPEC) ||
     (*store == req)) {
    *store = req;
    return 0;
  }
  fprintf(stderr, "You can only select one HTTP request!\n");
  return 1;
}

static void helpf(const char *fmt, ...)
{
  va_list ap;
  if(fmt) {
    va_start(ap, fmt);
    fputs("curl: ", stderr); /* prefix it */
    vfprintf(stderr, fmt, ap);
    va_end(ap);
  }
  fprintf(stderr, "curl: try 'curl --help' or "
          "'curl --manual' for more information\n");
}

/*
 * A chain of these nodes contain URL to get and where to put the URL's
 * contents.
 */
struct getout {
  struct getout *next; /* next one */
  char *url;     /* the URL we deal with */
  char *outfile; /* where to store the output */
  char *infile;  /* file to upload, if GETOUT_UPLOAD is set */
  int flags;     /* options */
};
#define GETOUT_OUTFILE (1<<0)   /* set when outfile is deemed done */
#define GETOUT_URL     (1<<1)   /* set when URL is deemed done */
#define GETOUT_USEREMOTE (1<<2) /* use remote file name locally */
#define GETOUT_UPLOAD  (1<<3)   /* if set, -T has been used */
#define GETOUT_NOUPLOAD  (1<<4) /* if set, -T "" has been used */


static void help(void)
{
  int i;
  const char *help[]={
    "Usage: curl [options...] <url>",
    "Options: (H) means HTTP/HTTPS only, (F) means FTP only",
    " -a/--append        Append to target file when uploading (F)",
    " -A/--user-agent <string> User-Agent to send to server (H)",
    "    --anyauth       Tell curl to choose authentication method (H)",
    " -b/--cookie <name=string/file> Cookie string or file to read cookies from (H)",
    "    --basic         Enable HTTP Basic Authentication (H)",
    " -B/--use-ascii     Use ASCII/text transfer",
    " -c/--cookie-jar <file> Write cookies to this file after operation (H)",
    " -C/--continue-at <offset> Resumed transfer offset",
    " -d/--data <data>   HTTP POST data (H)",
    "    --data-ascii <data>   HTTP POST ASCII data (H)",
    "    --data-binary <data>  HTTP POST binary data (H)",
    "    --negotiate     Enable HTTP Negotiate Authentication (H)",
    "    --digest        Enable HTTP Digest Authentication (H)",
    "    --disable-eprt  Prevent curl from using EPRT or LPRT (F)",
    "    --disable-epsv  Prevent curl from using EPSV (F)",
    " -D/--dump-header <file> Write the headers to this file",
    "    --egd-file <file> EGD socket path for random data (SSL)",
#ifdef USE_ENVIRONMENT
    "    --environment   Write result codes to environment variables (RISC OS)",
#endif
    " -e/--referer       Referer URL (H)",
    " -E/--cert <cert[:passwd]> Client certificate file and password (SSL)",
    "    --cert-type <type> Certificate file type (DER/PEM/ENG) (SSL)",
    "    --key <key>     Private key file name (SSL)",
    "    --key-type <type> Private key file type (DER/PEM/ENG) (SSL)",
    "    --pass  <pass>  Pass phrase for the private key (SSL)",
    "    --engine <eng>  Crypto engine to use (SSL)",
    "    --cacert <file> CA certificate to verify peer against (SSL)",
    "    --capath <directory> CA directory (made using c_rehash) to verify",
    "                    peer against (SSL)",
    "    --ciphers <list> SSL ciphers to use (SSL)",
    "    --compressed    Request compressed response (using deflate or gzip)",
    "    --connect-timeout <seconds> Maximum time allowed for connection",
    "    --create-dirs   Create necessary local directory hierarchy",
    "    --crlf          Convert LF to CRLF in upload",
    " -f/--fail          Fail silently (no output at all) on errors (H)",
    "    --ftp-create-dirs Create the remote dirs if not present (F)",
    "    --ftp-ssl       Enable SSL/TLS for the ftp transfer (F)",
    " -F/--form <name=content> Specify HTTP multipart POST data (H)",
    " -g/--globoff       Disable URL sequences and ranges using {} and []",
    " -G/--get           Send the -d data with a HTTP GET (H)",
    " -h/--help          This help text",
    " -H/--header <line> Custom header to pass to server (H)",
    " -i/--include       Include protocol headers in the output (H/F)",
    " -I/--head          Show document info only",
    " -j/--junk-session-cookies Ignore session cookies read from file (H)",
    "    --interface <interface> Specify network interface to use",
    "    --krb4 <level>  Enable krb4 with specified security level (F)",
    " -k/--insecure      Allow curl to connect to SSL sites without certs (H)",
    " -K/--config        Specify which config file to read",
    " -l/--list-only     List only names of an FTP directory (F)",
    "    --limit-rate <rate> Limit transfer speed to this rate",
    " -L/--location      Follow Location: hints (H)",
    "    --location-trusted Follow Location: and send authentication even ",
    "                    to other hostnames (H)",
    " -m/--max-time <seconds> Maximum time allowed for the transfer",
    "    --max-redirs <num> Maximum number of redirects allowed (H)",
    "    --max-filesize <bytes> Maximum file size to download (H/F)",
    " -M/--manual        Display the full manual",
    " -n/--netrc         Must read .netrc for user name and password",
    "    --netrc-optional Use either .netrc or URL; overrides -n",
    "    --ntlm          Enable HTTP NTLM authentication (H)",
    " -N/--no-buffer     Disable buffering of the output stream",
    " -o/--output <file> Write output to <file> instead of stdout",
    " -O/--remote-name   Write output to a file named as the remote file",
    " -p/--proxytunnel   Operate through a HTTP proxy tunnel (using CONNECT)",
    "    --proxy-ntlm    Enable NTLM authentication on the proxy (H)",
    " -P/--ftpport <address> Use PORT with address instead of PASV (F)",
    " -q                 If used as the first parameter disables .curlrc",
    " -Q/--quote <cmd>   Send command(s) to server before file transfer (F)",
    " -r/--range <range> Retrieve a byte range from a HTTP/1.1 or FTP server",
    "    --random-file <file> File for reading random data from (SSL)",
    " -R/--remote-time   Set the remote file's time on the local output",
    " -s/--silent        Silent mode. Don't output anything",
    " -S/--show-error    Show error. With -s, make curl show errors when they occur",
    "    --stderr <file> Where to redirect stderr. - means stdout",
    " -t/--telnet-option <OPT=val> Set telnet option",
    "    --trace <file>  Dump a network/debug trace to the given file",
    "    --trace-ascii <file> Like --trace but without the hex output",
    " -T/--upload-file <file> Transfer/upload <file> to remote site",
    "    --url <URL>     Another way to specify URL to work with",
    " -u/--user <user[:password]> Specify user and password to use",
    "                    Overrides -n and --netrc-optional",
    " -U/--proxy-user <user[:password]> Specify Proxy authentication",
    " -v/--verbose       Make the operation more talkative",
    " -V/--version       Show version number and quit",
#ifdef __DJGPP__
    "    --wdebug        Turn on WATT-32 debugging under DJGPP",
#endif
    " -w/--write-out [format] What to output after completion",
    " -x/--proxy <host[:port]> Use HTTP proxy on given port",
    " -X/--request <command> Specify request command to use",
    " -y/--speed-time    Time needed to trig speed-limit abort. Defaults to 30",
    " -Y/--speed-limit   Stop transfer if below speed-limit for 'speed-time' secs",
    " -z/--time-cond <time> Transfer based on a time condition",
    " -0/--http1.0       Use HTTP 1.0 (H)",
    " -1/--tlsv1         Use TLSv1 (SSL)",
    " -2/--sslv2         Use SSLv2 (SSL)",
    " -3/--sslv3         Use SSLv3 (SSL)",
    " -4/--ipv4          Resolve name to IPv4 address",
    " -6/--ipv6          Resolve name to IPv6 address",
    " -#/--progress-bar  Display transfer progress as a progress bar",
    NULL
  };
  for(i=0; help[i]; i++)
    puts(help[i]);
}

struct LongShort {
  const char *letter;
  const char *lname;
  bool extraparam;
};

struct Configurable {
  bool remote_time;
  char *random_file;
  char *egd_file;
  char *useragent;
  char *cookie;     /* single line with specified cookies */
  char *cookiejar;  /* write to this file */
  char *cookiefile; /* read from this file */
  bool cookiesession; /* new session? */
  bool encoding;    /* Accept-Encoding please */
  long authtype;    /* auth bitmask */  
  bool use_resume;
  bool resume_from_current;
  bool disable_epsv;
  bool disable_eprt;
  long resume_from;
  char *postfields;
  long postfieldsize;
  char *referer;
  long timeout;
  long connecttimeout;
  long maxredirs;
  long max_filesize;
  char *headerfile;
  char *ftpport;
  char *iface;
  unsigned short porttouse;
  char *range;
  long low_speed_limit;
  long low_speed_time;
  bool showerror;
  char *userpwd;
  char *proxyuserpwd;
  char *proxy;
  bool configread;
  bool proxytunnel;
  long conf;

  struct getout *url_list; /* point to the first node */
  struct getout *url_last; /* point to the last/current node */

  struct getout *url_get;  /* point to the node to fill in URL */
  struct getout *url_out;  /* point to the node to fill in outfile */

  char *cipher_list;
  char *cert;
  char *cert_type;
  char *cacert;
  char *capath;
  char *key;
  char *key_type;
  char *key_passwd;
  char *engine;
  bool crlf;
  char *customrequest;
  char *krb4level;
  char *trace_dump; /* file to dump the network trace to, or NULL */
  FILE *trace_stream;
  bool trace_fopened;
  bool trace_ascii;

  long httpversion;
  bool progressmode;
  bool nobuffer;
  bool globoff;
  bool use_httpget;
  bool insecure_ok; /* set TRUE to allow insecure SSL connects */
  bool create_dirs;
  bool ftp_create_dirs;
  bool proxyntlm;

  char *writeout; /* %-styled format string to output */
  bool writeenv; /* write results to environment, if available */

  FILE *errors; /* if stderr redirect is requested */
  bool errors_fopened;

  struct curl_slist *quote;
  struct curl_slist *postquote;
  struct curl_slist *prequote;

  long ssl_version;
  long ip_version;
  curl_TimeCond timecond;
  time_t condtime;

  struct curl_slist *headers;

  struct curl_httppost *httppost;
  struct curl_httppost *last_post;

  struct curl_slist *telnet_options;
        
  HttpReq httpreq;

  /* for bandwidth limiting features: */

  size_t sendpersecond; /* send to peer */
  size_t recvpersecond; /* receive from peer */

  time_t lastsendtime;
  size_t lastsendsize;

  time_t lastrecvtime;
  size_t lastrecvsize;

  bool ftp_ssl;
};

/* global variable to hold info about libcurl */
static curl_version_info_data *curlinfo;

static int parseconfig(const char *filename,
		       struct Configurable *config);
static char *my_get_line(FILE *fp);
static int create_dir_hierarchy(char *outfile);

static void GetStr(char **string,
		   char *value)
{
  if(*string)
    free(*string);
  if(value)
    *string = strdup(value);
  else
    *string = NULL;
}

static char *file2string(FILE *file)
{
  char buffer[256];
  char *ptr;
  char *string=NULL;
  int len=0;
  int stringlen;

  if(file) {
    while(fgets(buffer, sizeof(buffer), file)) {
      ptr= strchr(buffer, '\r');
      if(ptr)
        *ptr=0;
      ptr= strchr(buffer, '\n');
      if(ptr)
        *ptr=0;
      stringlen=strlen(buffer);
      if(string)
        string = realloc(string, len+stringlen+1);
      else
        string = malloc(stringlen+1);

      strcpy(string+len, buffer);

      len+=stringlen;
    }
    return string;
  }
  else
    return NULL; /* no string */
}

static char *file2memory(FILE *file, long *size)
{
  char buffer[1024];
  char *string=NULL;
  char *newstring=NULL;
  long len=0;
  long stringlen=0;

  if(file) {
    while((len = fread(buffer, 1, sizeof(buffer), file))) {
      if(string) {
        newstring = realloc(string, len+stringlen);
        if(newstring)
          string = newstring;
        else
          break; /* no more strings attached! :-) */
      }
      else
        string = malloc(len);
      memcpy(&string[stringlen], buffer, len);
      stringlen+=len;
    }
    *size = stringlen;
    return string;
  }
  else
    return NULL; /* no string */
}

void clean_getout(struct Configurable *config)
{
  struct getout *node=config->url_list;
  struct getout *next;

  while(node) {
    next = node->next;
    if(node->url)
      free(node->url);
    if(node->outfile)
      free(node->outfile);
    if(node->infile)
      free(node->infile);
    free(node);

    node = next; /* GOTO next */
  }
}

struct getout *new_getout(struct Configurable *config)
{
  struct getout *node =malloc(sizeof(struct getout));
  struct getout *last= config->url_last;
  if(node) {
    /* clear the struct */
    memset(node, 0, sizeof(struct getout));
        
    /* append this new node last in the list */
    if(last)
      last->next = node;
    else
      config->url_list = node; /* first node */
            
    /* move the last pointer */
    config->url_last = node;
  }
  return node;
}

/* Structure for storing the information needed to build a multiple files
 * section
*/
struct multi_files {
  struct curl_forms   form;
  struct multi_files *next;
};

/* Add a new list entry possibly with a type_name
 */
static struct multi_files *
AddMultiFiles (const char *file_name,
               const char *type_name,
               const char *show_filename,
               struct multi_files **multi_start,
               struct multi_files **multi_current)
{
  struct multi_files *multi;
  struct multi_files *multi_type = NULL;
  struct multi_files *multi_name = NULL;
  multi = (struct multi_files *)malloc(sizeof(struct multi_files));
  if (multi) {
    memset(multi, 0, sizeof(struct multi_files));
    multi->form.option = CURLFORM_FILE;
    multi->form.value = file_name;
  }
  else
    return NULL;

  if (!*multi_start)
    *multi_start = multi;

  if (type_name) {
    multi_type = (struct multi_files *)malloc(sizeof(struct multi_files));
    if (multi_type) {
      memset(multi_type, 0, sizeof(struct multi_files));
      multi_type->form.option = CURLFORM_CONTENTTYPE;
      multi_type->form.value = type_name;
      multi->next = multi_type;

      multi = multi_type;
    }
    else {
      free (multi);
      return NULL;
    }
  }
  if (show_filename) {
    multi_name = (struct multi_files *)malloc(sizeof(struct multi_files));
    if (multi_name) {
      memset(multi_name, 0, sizeof(struct multi_files));
      multi_name->form.option = CURLFORM_FILENAME;
      multi_name->form.value = show_filename;
      multi->next = multi_name;

      multi = multi_name;
    }
    else {
      free (multi);
      return NULL;
    }
  }

  if (*multi_current)
    (*multi_current)->next = multi;

  *multi_current = multi;

  return *multi_current;
}

/* Free the items of the list.
 */
static void FreeMultiInfo (struct multi_files *multi_start)
{
  struct multi_files *multi;
  while (multi_start) {
    multi = multi_start;
    multi_start = multi_start->next;
    free (multi);
  }
}

/***************************************************************************
 *
 * formparse()
 *	
 * Reads a 'name=value' paramter and builds the appropriate linked list.
 *
 * Specify files to upload with 'name=@filename'. Supports specified
 * given Content-Type of the files. Such as ';type=<content-type>'.
 *
 * You may specify more than one file for a single name (field). Specify
 * multiple files by writing it like:
 *
 * 'name=@filename,filename2,filename3'
 *
 * If you want content-types specified for each too, write them like:
 *
 * 'name=@filename;type=image/gif,filename2,filename3'
 *
 * If you want custom headers added for a single part, write them in a separate
 * file and do like this:
 *
 * 'name=foo;headers=@headerfile' or why not
 * 'name=@filemame;headers=@headerfile'
 *
 * To upload a file, but to fake the file name that will be included in the
 * formpost, do like this:
 *
 * 'name=@filename;filename=/dev/null'
 *
 * This function uses curl_formadd to fulfill it's job. Is heavily based on
 * the old curl_formparse code.
 *
 ***************************************************************************/

#define FORM_FILE_SEPARATOR ','
#define FORM_TYPE_SEPARATOR ';'

static int formparse(char *input,
                     struct curl_httppost **httppost,
                     struct curl_httppost **last_post)
{
  /* nextarg MUST be a string in the format 'name=contents' and we'll
     build a linked list with the info */
  char name[256];
  char *contents;
  char major[128];
  char minor[128];
  char *contp;
  const char *type = NULL;
  char *sep;
  char *sep2;

  /* Preallocate contents to the length of input to make sure we don't
     overwrite anything. */
  contents = malloc(strlen(input));
  contents[0] = '\000';
 
  if(1 <= sscanf(input, "%255[^=]=%[^\n]", name, contents)) {
    /* the input was using the correct format */
    contp = contents;

    if('@' == contp[0]) {
      struct multi_files *multi_start = NULL, *multi_current = NULL;
      /* we use the @-letter to indicate file name(s) */
      contp++;

      multi_start = multi_current=NULL;

      do {
	/* since this was a file, it may have a content-type specifier
	   at the end too, or a filename. Or both. */
        char *ptr;
        char *filename=NULL;

	sep=strchr(contp, FORM_TYPE_SEPARATOR);
	sep2=strchr(contp, FORM_FILE_SEPARATOR);

	/* pick the closest */
	if(sep2 && (sep2 < sep)) {
	  sep = sep2;

	  /* no type was specified! */
	}

        type = NULL;

	if(sep) {

	  /* if we got here on a comma, don't do much */
	  if(FORM_FILE_SEPARATOR == *sep)
	    ptr = NULL;
	  else
            ptr = sep+1;

	  *sep=0; /* terminate file name at separator */

	  while(ptr && (FORM_FILE_SEPARATOR!= *ptr)) {

            /* pass all white spaces */
            while(isspace((int)*ptr))
              ptr++;

            if(curl_strnequal("type=", ptr, 5)) {

              /* set type pointer */
              type = &ptr[5];
	    
              /* verify that this is a fine type specifier */
              if(2 != sscanf(type, "%127[^/]/%127[^;,\n]",
                             major, minor)) {
                fprintf(stderr, "Illegally formatted content-type field!\n");
                free(contents);
                FreeMultiInfo (multi_start);
                return 2; /* illegal content-type syntax! */
              }
              /* now point beyond the content-type specifier */
              sep = (char *)type + strlen(major)+strlen(minor)+1;

              *sep=0; /* zero terminate type string */

              ptr=sep+1;
            }
            else if(curl_strnequal("filename=", ptr, 9)) {
              filename = &ptr[9];
              ptr=strchr(filename, FORM_TYPE_SEPARATOR);
              if(!ptr) {
                ptr=strchr(filename, FORM_FILE_SEPARATOR);
              }
              if(ptr) {
                *ptr=0; /* zero terminate */
                ptr++;
              }
            }
            else
              /* confusion, bail out of loop */
              break;
	  }
          /* find the following comma */
          if(ptr)
            sep=strchr(ptr, FORM_FILE_SEPARATOR);
          else
            sep=NULL;
	}
	else {
	  sep=strchr(contp, FORM_FILE_SEPARATOR);
	}
	if(sep) {
	  /* the next file name starts here */
	  *sep =0;
	  sep++;
	}
        /* if type == NULL curl_formadd takes care of the problem */

        if (!AddMultiFiles (contp, type, filename, &multi_start,
                            &multi_current)) {
          fprintf(stderr, "Error building form post!\n");
          free(contents);
          FreeMultiInfo (multi_start);
          return 3;
        }
	contp = sep; /* move the contents pointer to after the separator */

      } while(sep && *sep); /* loop if there's another file name */

      /* now we add the multiple files section */
      if (multi_start) {
        struct curl_forms *forms = NULL;
        struct multi_files *ptr = multi_start;
        unsigned int i, count = 0;
        while (ptr) {
          ptr = ptr->next;
          ++count;
        }
        forms =
          (struct curl_forms *)malloc((count+1)*sizeof(struct curl_forms));
        if (!forms)
        {
          fprintf(stderr, "Error building form post!\n");
          free(contents);
          FreeMultiInfo (multi_start);
          return 4;
        }
        for (i = 0, ptr = multi_start; i < count; ++i, ptr = ptr->next)
        {
          forms[i].option = ptr->form.option;
          forms[i].value = ptr->form.value;
        }
        forms[count].option = CURLFORM_END;
        FreeMultiInfo (multi_start);
        if (curl_formadd (httppost, last_post,
                          CURLFORM_COPYNAME, name,
                          CURLFORM_ARRAY, forms, CURLFORM_END) != 0) {
          fprintf(stderr, "curl_formadd failed!\n");
          free(forms);
          free(contents);
          return 5;
        }
        free(forms);
      }
    }