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/*
* Copyright (c) 2010 Remko Tronçon
* Licensed under the GNU General Public License v3.
* See Documentation/Licenses/GPLv3.txt for more information.
*/
#include <Swiften/Base/URL.h>
#include <iostream>
namespace Swift {
int URL::getPortOrDefaultPort(const URL& url) {
if (url.getPort()) {
return *url.getPort();
}
else if (url.getScheme() == "http") {
return 80;
}
else if (url.getScheme() == "https") {
return 443;
}
else {
std::cerr << "Unknown scheme: " + url.getScheme() << std::endl;
return 80;
}
}
URL URL::fromString(const std::string& urlString) {
size_t colonIndex = urlString.find(':');
if (colonIndex == std::string::npos) {
return URL();
}
std::string scheme = urlString.substr(0, colonIndex);
// Authority
if (urlString.size() > colonIndex + 2 && urlString[colonIndex+1] == '/' && urlString[colonIndex+2] == '/') {
size_t authorityIndex = colonIndex + 3;
size_t slashIndex = urlString.find('/', authorityIndex);
std::string authority;
std::string path;
if (slashIndex == std::string::npos) {
authority = urlString.substr(authorityIndex);
path = "";
}
else {
authority = urlString.substr(authorityIndex, slashIndex - authorityIndex);
path = unescape(urlString.substr(slashIndex));
}
size_t atIndex = authority.find('@');
std::string userInfo;
std::string hostAndPort;
if (atIndex != std::string::npos) {
userInfo = authority.substr(0, atIndex);
hostAndPort = authority.substr(atIndex + 1);
}
else {
userInfo = "";
hostAndPort = authority;
}
std::string host;
boost::optional<int> port;
colonIndex = hostAndPort.find(':');
if (colonIndex != std::string::npos) {
host = unescape(hostAndPort.substr(0, colonIndex));
try {
port = boost::lexical_cast<int>(hostAndPort.substr(colonIndex + 1));
}
catch (const boost::bad_lexical_cast&) {
return URL();
}
}
else {
host = unescape(hostAndPort);
}
if (port) {
return URL(scheme, host, *port, path);
}
else {
return URL(scheme, host, path);
}
}
else {
// We don't support URLs without authorities yet
return URL();
}
}
// FIXME: Escape non-ascii characters
std::string URL::toString() const {
if (empty) {
return "";
}
std::string result = scheme + "://";
if (!user.empty()) {
result += user;
if (!password.empty()) {
result += ":" + password;
}
result += "@";
}
result += host;
if (port) {
result += ":";
result += boost::lexical_cast<std::string>(*port);
}
result += path;
return result;
}
// 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);
}
};
std::string unescape(const std::string& s) {
try {
return boost::find_format_all_copy(s, PercentEncodedCharacterFinder(), PercentUnencodeFormatter());
}
catch (const std::exception&) {
return "";
}
}
#endif
std::string URL::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;
}
}
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