/* Declarations for url.c.
   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.

This file is part of GNU Wget.

GNU Wget 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.

GNU Wget 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 Wget; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

In addition, as a special exception, the Free Software Foundation
gives permission to link the code of its release of Wget with the
OpenSSL project's "OpenSSL" library (or with modified versions of it
that use the same license as the "OpenSSL" library), and distribute
the linked executables.  You must obey the GNU General Public License
in all respects for all of the code used other than "OpenSSL".  If you
modify this file, you may extend this exception to your version of the
file, but you are not obligated to do so.  If you do not wish to do
so, delete this exception statement from your version.  */

#ifndef URL_H
#define URL_H

/* Default port definitions */
#define DEFAULT_HTTP_PORT 80
#define DEFAULT_FTP_PORT 21
#define DEFAULT_HTTPS_PORT 443

/* Note: the ordering here is related to the order of elements in
   `supported_schemes' in url.c.  */

enum url_scheme {
  SCHEME_HTTP,
#ifdef HAVE_SSL
  SCHEME_HTTPS,
#endif
  SCHEME_FTP,
  SCHEME_INVALID
};

/* Structure containing info on a URL.  */
struct url
{
  char *url;			/* Original URL */
  enum url_scheme scheme;	/* URL scheme */

  char *host;			/* Extracted hostname */
  int port;			/* Port number */

  /* URL components (URL-quoted). */
  char *path;
  char *params;
  char *query;
  char *fragment;

  /* Extracted path info (unquoted). */
  char *dir;
  char *file;

  /* Username and password (unquoted). */
  char *user;
  char *passwd;
};

enum convert_options {
  CO_NOCONVERT = 0,		/* don't convert this URL */
  CO_CONVERT_TO_RELATIVE,	/* convert to relative, e.g. to
                                   "../../otherdir/foo.gif" */
  CO_CONVERT_TO_COMPLETE,	/* convert to absolute, e.g. to
				   "http://orighost/somedir/bar.jpg". */
  CO_NULLIFY_BASE		/* change to empty string. */
};

/* A structure that defines the whereabouts of a URL, i.e. its
   position in an HTML document, etc.  */

struct urlpos {
  struct url *url;		/* the URL of the link, after it has
				   been merged with the base */
  char *local_name;		/* local file to which it was saved
				   (used by convert_links) */

  /* reserved for special links such as <base href="..."> which are
     used when converting links, but ignored when downloading.  */
  unsigned int ignore_when_downloading	:1;

  /* Information about the original link: */

  unsigned int link_relative_p	:1; /* was the link relative? */
  unsigned int link_complete_p	:1; /* was the link complete (with the
				       host name, etc.) */
  unsigned int link_base_p	:1; /* was the link <base href=...> */
  unsigned int link_inline_p	:1; /* needed to render the page. */

  unsigned int link_refresh_p	:1; /* link was received from
				       <meta http-equiv=refresh content=...> */
  int refresh_timeout;		/* for reconstructing the refresh. */

  /* Conversion requirements: */
  enum convert_options convert;	/* is conversion required? */

  /* URL's position in the buffer. */
  int pos, size;

  struct urlpos *next;		/* next list element */
};

/* downloaded_file() takes a parameter of this type and returns this type. */
typedef enum
{
  /* Return enumerators: */
  FILE_NOT_ALREADY_DOWNLOADED = 0,

  /* Return / parameter enumerators: */
  FILE_DOWNLOADED_NORMALLY,
  FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED,

  /* Parameter enumerators: */
  CHECK_FOR_FILE
} downloaded_file_t;

/* Function declarations */

char *encode_string PARAMS ((const char *));

struct url *url_parse PARAMS ((const char *, int *));
const char *url_error PARAMS ((int));
char *url_full_path PARAMS ((const struct url *));
void url_set_dir PARAMS ((struct url *, const char *));
void url_set_file PARAMS ((struct url *, const char *));
void url_free PARAMS ((struct url *));

enum url_scheme url_scheme PARAMS ((const char *));
int url_skip_scheme PARAMS ((const char *));
int url_has_scheme PARAMS ((const char *));
int scheme_default_port PARAMS ((enum url_scheme));
void scheme_disable PARAMS ((enum url_scheme));

int url_skip_uname PARAMS ((const char *));

char *url_string PARAMS ((const struct url *, int));

struct urlpos *get_urls_file PARAMS ((const char *));
struct urlpos *get_urls_html PARAMS ((const char *, const char *, int *));
void free_urlpos PARAMS ((struct urlpos *));

char *uri_merge PARAMS ((const char *, const char *));

void rotate_backups PARAMS ((const char *));
int mkalldirs PARAMS ((const char *));
char *url_filename PARAMS ((const struct url *));

char *getproxy PARAMS ((enum url_scheme));
int no_proxy_match PARAMS ((const char *, const char **));

void convert_links PARAMS ((const char *, struct urlpos *));

downloaded_file_t downloaded_file PARAMS ((downloaded_file_t, const char *));

char *rewrite_shorthand_url PARAMS ((const char *));

#endif /* URL_H */
