yate/engine/URI.cpp

/**
 * URI.cpp
 * This file is part of the YATE Project http://YATE.null.ro
 *
 * Yet Another Telephony Engine - a fully featured software PBX and IVR
 * Copyright (C) 2004-2014 Null Team
 *
 * This software is distributed under multiple licenses;
 * see the COPYING file in the main directory for licensing
 * information for this specific distribution.
 *
 * This use of this software may be subject to additional restrictions.
 * See the LEGAL file in the main directory for details.
 *
 * This program 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.
 */

#include "yateclass.h"

using namespace TelEngine;

static const String s_jabber("jabber");
static const String s_xmpp("xmpp");

URI::URI()
    : m_parsed(false)
{
}

URI::URI(const URI& uri)
    : String(uri), m_parsed(false)
{
    m_desc = uri.getDescription();
    m_proto = uri.getProtocol();
    m_user = uri.getUser();
    m_host = uri.getHost();
    m_port = uri.getPort();
    m_extra = uri.getExtra();
    m_parsed = true;
}

URI::URI(const String& uri)
    : String(uri), m_parsed(false)
{
}

URI::URI(const char* uri)
    : String(uri), m_parsed(false)
{
}

URI::URI(const char* proto, const char* user, const char* host, int port, const char* desc)
    : m_desc(desc), m_proto(proto), m_user(user), m_host(host), m_port(port)
{
    if (desc) {
	if (m_desc)
	    *this << "\"" << m_desc << "\" ";
	*this << "<";
    }
    *this << m_proto << ":";
    if (user)
	*this << m_user << "@";
    if (m_host.find(':') >= 0)
	*this << "[" << m_host << "]";
    else
	*this << m_host;
    if (m_port > 0)
	*this << ":" << m_port;
    if (desc)
	*this << ">";
    m_parsed = true;
}

void URI::changed()
{
    m_parsed = false;
    String::changed();
}

void URI::parse() const
{
    if (m_parsed)
	return;
    DDebug("URI",DebugAll,"parsing '%s' [%p]",c_str(),this);
    m_port = 0;
    m_desc.clear();

    // the compiler generates wrong code so use the temporary
    String tmp(*this);
    bool hasDesc = false;
    static const Regexp r1("^[[:space:]]*\"\\([^\"]\\+\\)\"[[:space:]]*\\(.*\\)$");
    if (tmp.matches(r1))
	hasDesc = true;
    else {
	static const Regexp r2("^[[:space:]]*\\([^<]*[^<[:space:]]\\)[[:space:]]*<\\([^>]\\+\\)");
	hasDesc = tmp.matches(r2);
    }
    if (hasDesc) {
	m_desc = tmp.matchString(1);
	tmp = tmp.matchString(2);
	*const_cast<URI*>(this) = tmp;
	DDebug("URI",DebugAll,"new value='%s' [%p]",c_str(),this);
    }

    static const Regexp r3("<\\([^>]\\+\\)>");
    if (tmp.matches(r3)) {
	tmp = tmp.matchString(1);
	*const_cast<URI*>(this) = tmp;
	DDebug("URI",DebugAll,"new value='%s' [%p]",c_str(),this);
    }

    // Should be:
    // [proto:[//]][user[:passwd]@]hostname[:port][/path][?param=value[&param=value...]]
    // We parse:
    // [proto:][//][user@]hostname[:port][/path][;params][?params][&params]

    static const Regexp r4("^\\([[:alpha:]][[:alnum:]]\\+:\\)\\?/\\?/\\?\\([^[:space:][:cntrl:]@]\\+@\\)\\?\\([[:alnum:]._-]\\+\\|[[][[:xdigit:].:]\\+[]]\\)\\(:[0-9]\\+\\)\\?");
    // hack: use while only so we could break out of it
    while (tmp.matches(r4)) {
	int errptr = -1;
	m_proto = tmp.matchString(1).toLower();
	m_proto = m_proto.substr(0,m_proto.length()-1);
	m_user = tmp.matchString(2);
	m_user = m_user.substr(0,m_user.length()-1);
	if (m_proto && s_jabber != m_proto && s_xmpp != m_proto) {
	    m_user = m_user.uriUnescape(&errptr);
	    if (errptr >= 0)
		break;
	}
	m_host = tmp.matchString(3).uriUnescape(&errptr).toLower();
	if (errptr >= 0)
	    break;
	if (m_host[0] == '[')
	    m_host = m_host.substr(1,m_host.length()-2);
	String p = tmp.matchString(4);
	p >> ":" >> m_port;
	DDebug("URI",DebugAll,"desc='%s' proto='%s' user='%s' host='%s' port=%d [%p]",
	    m_desc.c_str(), m_proto.c_str(), m_user.c_str(), m_host.c_str(), m_port, this);
	int index = (tmp.matchLength(4) > 0) ? 4 : 3;
	m_extra = tmp.substr(tmp.matchOffset(index) + tmp.matchLength(index));
	m_parsed = true;
	return;
    }
    // parsing failed - clear all fields but still mark as parsed
    m_desc.clear();
    m_proto.clear();
    m_user.clear();
    m_host.clear();
    m_extra.clear();
    m_parsed = true;
}

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