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version 3.0

/*************************************************************************
* (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
*  by Michael Pounov <misho@elwix.org>
*
* $Author: misho $
* $Id: url.c,v 1.4 2013/05/30 09:25:35 misho Exp $
*
**************************************************************************
The ELWIX and AITNET software is distributed under the following
terms:

All of the documentation and software included in the ELWIX and AITNET
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>

Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
	by Michael Pounov <misho@elwix.org>.  All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
   must display the following acknowledgement:
This product includes software developed by Michael Pounov <misho@elwix.org>
ELWIX - Embedded LightWeight unIX and its contributors.
4. Neither the name of AITNET nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
#include "global.h"


/*
 * www_URLInit() - Init URL structure and free old one
 *
 * @url = Input URL
 * return: -1 error or 0 ok
 */
int
www_URLInit(struct tagIOURL * __restrict url)
{
	if (!url)
		return -1;
	else
		memset(url, 0, sizeof(struct tagIOURL));

	AIT_INIT_VAL2(&url->url_tech, string);
	AIT_INIT_VAL2(&url->url_user, string);
	AIT_INIT_VAL2(&url->url_pass, string);
	AIT_INIT_VAL2(&url->url_host, string);
	AIT_INIT_VAL2(&url->url_port, string);
	AIT_INIT_VAL2(&url->url_path, string);
	AIT_INIT_VAL2(&url->url_args, string);
	return 0;
}

/*
 * www_URLGet() - Parse and get data from input URL
 *
 * @csURL = Input URL line
 * @url = Output parsed URL
 * return: 0 error format not find tech:// and return URL like path; 
 * 		-1 error:: can`t read; >0 ok, up bits for known elements
 */
int
www_URLGet(const char *csURL, struct tagIOURL * __restrict url)
{
	char *pos, *at, *cl, *sl;
	int ret = 0;

	if (!url)
		return -1;
	else
		www_URLInit(url);

	AIT_SET_STR(&url->url_line, csURL);
	/* unescape URL */
	www_unescape(AIT_GET_STR(&url->url_line));
	/* Tech */
	if (!(pos = strstr(AIT_GET_STR(&url->url_line), "://"))) {
		AIT_SET_LIKE(&url->url_path, string, 
				AIT_LEN(&url->url_line), AIT_ADDR(&url->url_line));
		return ret;
	} else {
		AIT_SET_LIKE(&url->url_tech, string, 
				pos - AIT_GET_STR(&url->url_line), AIT_ADDR(&url->url_line));
		if (AIT_LEN(&url->url_tech))
			ret |= 1;

		*pos = 0;
		pos += 3;	/* :// */
	}

	/* User */
	if ((at = strchr(pos, '@'))) {
		*at++ = 0;
		/* Pass */
		if ((cl = strchr(pos, ':'))) {
			*cl++ = 0;

			AIT_SET_LIKE(&url->url_pass, string, at - cl - 1, cl);
			if (AIT_LEN(&url->url_pass))
				ret |= 4;
		} else
			cl = at;

		AIT_SET_LIKE(&url->url_user, string, cl - pos - 1, pos);
		if (AIT_LEN(&url->url_user))
			ret |= 2;

		pos = at;
	}

	/* Host */
	if ((sl = strchr(pos, '/')))
		*sl++ = 0;
	else
		sl = pos + strlen(pos) + 1;
	/* Port */
	if ((cl = strchr(pos, ':'))) {
		*cl++ = 0;

		AIT_SET_LIKE(&url->url_port, string, sl - cl - 1, cl);
		if (AIT_LEN(&url->url_port))
			ret |= 16;
	} else
		cl = sl;

	AIT_SET_LIKE(&url->url_host, string, cl - pos - 1, pos);
	if (AIT_LEN(&url->url_host))
		ret |= 8;

	pos = sl;

	/* Args */
	if ((at = strchr(pos, '?'))) {
		*at++ = 0;

		AIT_SET_LIKE(&url->url_args, string, strlen(at), at);
		if (AIT_LEN(&url->url_args))
			ret |= 64;
	} else
		at = pos + strlen(pos) + 1;

	/* Path */
	AIT_SET_LIKE(&url->url_path, string, at - pos - 1, pos);
	if (AIT_LEN(&url->url_path))
		ret |= 32;

	pos = at + strlen(at);

	/* Reserved */
	url->url_reserved = (u_char*) pos;
	if (*pos)
		ret |= 128;

	return ret;
}

/*
 * www_URLGetFile() - Get file from parsed URL
 *
 * @url = Input parsed URL
 * @value = Return filename, if not specified file in url path, replace with /
 * return: -1 error, 0 filename from path, 1 filename or 2 not specified filename
 */
int
www_URLGetFile(struct tagIOURL * __restrict url, ait_val_t * __restrict value)
{
	char *pos, *psBuf;
	int ret = 0;

	if (!url || !value)
		return -1;

	psBuf = e_strdup(AIT_GET_STR(&url->url_path));
	if (!psBuf) {
		www_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
		return -1;
	} else
		AIT_FREE_VAL(value);

	pos = strrchr(psBuf, '/');
	if (!pos) {
		/* whole string is filename */
		pos = psBuf;
		ret = 1;
	} else
		*pos++ = 0;
	/* If not specified file in path, default replace to / */
	if (!*pos) {
		pos = "/";
		ret = 2;
	}

	AIT_SET_STR(value, pos);
	e_free(psBuf);
	return ret;
}

/*
 * www_URLFree() - URL free structure
 *
 * @url = Input parsed URL
 * return: none
 */
void
www_URLFree(struct tagIOURL * __restrict url)
{
	AIT_FREE_VAL(&url->url_tech);
	AIT_FREE_VAL(&url->url_user);
	AIT_FREE_VAL(&url->url_pass);
	AIT_FREE_VAL(&url->url_host);
	AIT_FREE_VAL(&url->url_port);
	AIT_FREE_VAL(&url->url_path);
	AIT_FREE_VAL(&url->url_args);
	url->url_reserved = NULL;

	AIT_FREE_VAL(&url->url_line);
}

/*
 * www_XMLGet() - Parse and get data from input XML request string
 * 				[ns:]container[|attribute[=value]][?data]
 *
 * @csXML = Input XML request line
 * @xml = Output parsed XML request
 * return: 0 error format incorrect, -1 error:: can`t read; >0 ok readed elements bits
 */
int
www_XMLGet(const char *csXML, struct tagReqXML *xml)
{
	char *pos, *p, *end;
	int ret = 0;

	if (!csXML || !xml)
		return -1;
	else
		memset(xml, 0, sizeof *xml);

	strlcpy((char*) xml->xml_line, csXML, BUFSIZ);
	/* if namespace present */
	if ((pos = strchr((char*) xml->xml_line, ':'))) {
		xml->xml_namespace.value = (char*) xml->xml_line;
		xml->xml_namespace.vallen = pos - (char*) xml->xml_line;
		if (xml->xml_namespace.vallen)
			ret |= 1;
		*pos++ = 0;
	} else
		pos = (char*) xml->xml_line;
	/* if container is path */
	if (*pos == '/') {
		xml->xml_node.path.value = pos;
		xml->xml_node.path.vallen = strlen(pos);
		if (!xml->xml_node.path.vallen)
			ret = 0;
		else
			ret |= 32;
		return ret;
	} else {
		/* container */
		xml->xml_node.container.value = pos;
		xml->xml_node.container.vallen = strlen(pos);
		if (!xml->xml_node.container.vallen)
			return 0;
		else
			ret |= 2;
	}
	end = strchr(pos, '?');
	/* if attribute present */
	if (pos && (p = strchr(pos, '|')) && (!end || end > p)) {
		pos = p;
		*pos++ = 0;
		xml->xml_node.container.vallen = strlen(xml->xml_node.container.value);
		if (!xml->xml_node.container.vallen)
			return 0;

		xml->xml_attribute.value = pos;
		xml->xml_attribute.vallen = strlen(pos);
		if (xml->xml_attribute.vallen)
			ret |= 4;
	}
	/* if value present */
	if (pos && (p = strchr(pos, '=')) && (!end || end > p)) {
		if (!(ret & 4))
			return 0;
		else
			pos = p;
		*pos++ = 0;
		xml->xml_attribute.vallen = strlen(xml->xml_attribute.value);
		if (!xml->xml_attribute.vallen)
			return 0;

		xml->xml_value.value = pos;
		xml->xml_value.vallen = strlen(pos);
		if (xml->xml_value.vallen)
			ret |= 8;
	}
	/* if data present */
	if (pos && end) {
		if (ret < 2)
			return 0;
		else
			pos = end;
		*pos++ = 0;
		if (ret & 8) {
			xml->xml_value.vallen = strlen(xml->xml_value.value);
			if (!xml->xml_value.vallen)
				return 0;
		} else if (ret & 4) {
			xml->xml_attribute.vallen = strlen(xml->xml_attribute.value);
			if (!xml->xml_attribute.vallen)
				return 0;
		} else if (ret & 2) {
			xml->xml_node.container.vallen = strlen(xml->xml_node.container.value);
			if (!xml->xml_node.container.vallen)
				return 0;
		} else
			return 0;

		xml->xml_data.value = pos;
		xml->xml_data.vallen = strlen(pos);
		if (xml->xml_data.vallen)
			ret |= 16;
	}

	return ret;
}