/* Declarations for url.c.
   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   2005, 2006, 2007, 2008, 2009, 2010, 2011 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 3 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, see <http://www.gnu.org/licenses/>.

Additional permission under GNU GPL version 3 section 7

If you modify this program, or any covered work, by linking or
combining it with the OpenSSL project's OpenSSL library (or a
modified version of that library), containing parts covered by the
terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
grants you additional permission to convey the resulting work.
Corresponding Source for a non-source form of such a combination
shall include the source code for the parts of OpenSSL used as well
as that of the covered work.  */

#ifndef URL_H
#define URL_H

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

/* This represents how many characters less than the OS max name length a file
 * should be.  More precisely, a file name should be at most
 * (NAME_MAX - CHOMP_BUFFER) characters in length.  This number was arrived at
 * by adding the lengths of all possible strings that could be appended to a
 * file name later in the code (e.g. ".orig", ".html", etc.).  This is
 * hopefully plenty of extra characters, but I am not guaranteeing that a file
 * name will be of the proper length by the time the code wants to open a
 * file descriptor. */
#define CHOMP_BUFFER 19

/* The flags that allow clobbering the file (opening with "wb").
   Defined here to avoid repetition later.  #### This will require
   rework.  */
#define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
                  || opt.dirstruct || opt.output_document || opt.backups > 0)

/* Specifies how, or whether, user auth information should be included
 * in URLs regenerated from URL parse structures. */
enum url_auth_mode {
  URL_AUTH_SHOW,
  URL_AUTH_HIDE_PASSWD,
  URL_AUTH_HIDE
};

/* 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;

  /* 'host' is allocated by idna_to_ascii_8z() via idn_encode().
   * Call 'idn_free()' to free this memory. */
  bool idn_allocated;
};

/* Function declarations */

char *url_escape (const char *);
char *url_escape_unsafe_and_reserved (const char *);
void url_unescape (char *);

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

enum url_scheme url_scheme (const char *);
bool url_has_scheme (const char *);
bool url_valid_scheme (const char *);
int scheme_default_port (enum url_scheme);
void scheme_disable (enum url_scheme);

char *url_string (const struct url *, enum url_auth_mode);
char *url_file_name (const struct url *, char *);

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

int mkalldirs (const char *);

char *rewrite_shorthand_url (const char *);
bool schemes_are_similar_p (enum url_scheme a, enum url_scheme b);

bool are_urls_equal (const char *u1, const char *u2);

#endif /* URL_H */