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/*
* Copyright (c) 2011 Remko Tronçon
* Licensed under the GNU General Public License v3.
* See Documentation/Licenses/GPLv3.txt for more information.
*/
#include <SwifTools/URIHandler/XMPPURI.h>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/algorithm/string/find_format.hpp>
#include <boost/algorithm/string/formatter.hpp>
#include <boost/algorithm/string/find_iterator.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
#include <sstream>
#include <stdexcept>
#include <vector>
using namespace Swift;
// Disabling this code for now, since GCC4.5+boost1.42 (on ubuntu) seems to
// result in a bug. Replacing it with naive code.
#if 0
// Should be in anonymous namespace, but older GCCs complain if we do that
struct PercentEncodedCharacterFinder {
template<typename Iterator>
boost::iterator_range<Iterator> operator()(Iterator begin, Iterator end) {
boost::iterator_range<Iterator> r = boost::first_finder("%")(begin, end);
if (r.end() == end) {
return r;
}
else {
if (r.end() + 1 == end || r.end() + 2 == end) {
throw std::runtime_error("Incomplete escape character");
}
else {
r.advance_end(2);
return r;
}
}
}
};
struct PercentUnencodeFormatter {
template<typename FindResult>
std::string operator()(const FindResult& match) const {
std::stringstream s;
s << std::hex << std::string(match.begin() + 1, match.end());
unsigned int value;
s >> value;
if (s.fail() || s.bad()) {
throw std::runtime_error("Invalid escape character");
}
unsigned char charValue = static_cast<unsigned char>(value);
return std::string(reinterpret_cast<const char*>(&charValue), 1);
}
};
namespace {
std::string unescape(const std::string& s) {
try {
return boost::find_format_all_copy(s, PercentEncodedCharacterFinder(), PercentUnencodeFormatter());
}
catch (const std::exception&) {
return "";
}
}
}
#endif
namespace {
std::string unescape(const std::string& str) {
std::string result;
for (size_t i = 0; i < str.size(); ++i) {
if (str[i] == '%') {
if (i + 3 < str.size()) {
std::stringstream s;
s << std::hex << str.substr(i+1, 2);
unsigned int value;
s >> value;
if (s.fail() || s.bad()) {
return "";
}
unsigned char charValue = static_cast<unsigned char>(value);
result += std::string(reinterpret_cast<const char*>(&charValue), 1);
i += 2;
}
else {
return "";
}
}
else {
result += str[i];
}
}
return result;
}
}
XMPPURI::XMPPURI() {
}
XMPPURI XMPPURI::fromString(const std::string& s) {
XMPPURI result;
if (boost::starts_with(s, "xmpp:")) {
std::string uri = s.substr(5, s.npos);
bool parsePath = true;
bool parseQuery = true;
bool parseFragment = true;
// Parse authority
if (boost::starts_with(uri, "//")) {
size_t i = uri.find_first_of("/#?", 2);
result.setAuthority(JID(unescape(uri.substr(2, i - 2))));
if (i == uri.npos) {
uri = "";
parsePath = parseQuery = parseFragment = false;
}
else {
if (uri[i] == '?') {
parsePath = false;
}
else if (uri[i] == '#') {
parseQuery = parsePath = false;
}
uri = uri.substr(i + 1, uri.npos);
}
}
// Parse path
if (parsePath) {
size_t i = uri.find_first_of("#?");
result.setPath(JID(unescape(uri.substr(0, i))));
if (i == uri.npos) {
uri = "";
parseQuery = parseFragment = false;
}
else {
if (uri[i] == '#') {
parseQuery = false;
}
uri = uri.substr(i + 1, uri.npos);
}
}
// Parse query
if (parseQuery) {
size_t end = uri.find_first_of("#");
std::string query = uri.substr(0, end);
bool haveType = false;
typedef boost::split_iterator<std::string::iterator> split_iterator;
for (split_iterator it = boost::make_split_iterator(query, boost::first_finder(";")); it != split_iterator(); ++it) {
if (haveType) {
std::vector<std::string> keyValue;
boost::split(keyValue, *it, boost::is_any_of("="));
if (keyValue.size() == 1) {
result.addQueryParameter(unescape(keyValue[0]), "");
}
else if (keyValue.size() >= 2) {
result.addQueryParameter(unescape(keyValue[0]), unescape(keyValue[1]));
}
}
else {
result.setQueryType(unescape(boost::copy_range<std::string>(*it)));
haveType = true;
}
}
uri = (end == uri.npos ? "" : uri.substr(end + 1, uri.npos));
}
// Parse fragment
if (parseFragment) {
result.setFragment(unescape(uri));
}
}
return result;
}
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