recur.h

Wget很好的处理了http和ftp的下载,很值得学习的经典代码

/* Declarations for recur.c.
   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   2004, 2005, 2006, 2007, 2008 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 RECUR_H
#define RECUR_H

/* For most options, 0 means no limits, but with -p in the picture,
   that causes a problem on the maximum recursion depth variable.  To
   retain backwards compatibility we allow users to consider "0" to be
   synonymous with "inf" for -l, but internally infinite recursion is
   specified by -1 and 0 means to only retrieve the requisites of a
   single document. */
#define INFINITE_RECURSION -1

struct urlpos;

void recursive_cleanup (void);
uerr_t retrieve_tree (const char *);

/* These are really in html-url.c. */
struct urlpos *get_urls_file (const char *);
struct urlpos *get_urls_html (const char *, const char *, bool *);
void free_urlpos (struct urlpos *);

#endif /* RECUR_H */