C++ string_ref::find方法代码示例

SimpleTemplate::SimpleTemplate(boost::string_ref text)
{
    static char const rawMarker[] = "@@";
    static boost::string_ref const marker(rawMarker, sizeof(rawMarker) - 1);

    auto beg = text.find(marker);
    while (beg != boost::string_ref::npos) {
        m_literals.emplace_back(text.data(), beg);
        text.remove_prefix(beg + marker.size());
        auto end = text.find(marker);
        if (end == boost::string_ref::npos) {
            std::string& lit = m_literals.back();
            lit.reserve(lit.size() + marker.size() + text.size());
            lit.append(marker.data(), marker.size());
            lit.append(text.data(), text.size());
            assert(m_literals.size() == m_insertionKeys.size() + 1);
            return;
        }
        m_insertionKeys.emplace_back(text.data(), end);
        text.remove_prefix(end + marker.size());
        beg = text.find(marker);
    }
    m_literals.emplace_back(text.data(), text.size());
    assert(m_literals.size() == m_insertionKeys.size() + 1);
}

std::string CHttpUrl::ParseDomain(boost::string_ref & url)
{
	auto domainPos = url.find(':');
	if (domainPos == boost::string_ref::npos)
	{
		domainPos = url.find("/");
		domainPos = (domainPos == boost::string_ref::npos ? url.size() : domainPos);
	}
	auto domain = url.substr(0, domainPos).to_string();
	url = url.substr(domainPos, url.size());
	return domain;
}

Protocol CHttpUrl::CheckProtocol(boost::string_ref const &url, size_t &index)
{
	Protocol protocol;
	auto pos = url.find("://");
	if (pos != url.size())
	{
		if (url.substr(0, pos) == "https")
		{	
			protocol = Protocol::HTTPS;
		}
		else if (url.substr(0, pos) == "http")
		{
			protocol = Protocol::HTTP;
		}
		else
		{
			throw std::invalid_argument("Protocol uncorrect.");
		}
		if (index == url.size())
		{
			throw std::invalid_argument("Invalid url was introduced");
		}
	}
	index = pos + 3;
	return protocol;
}

unsigned short CHttpUrl::ParsePort(boost::string_ref & str)
{
	if (str.front() == ':')
	{
		auto portPos = str.find('/');
		string port;
		if (portPos == boost::string_ref::npos)
		{
			port = str.substr(1, str.size()).to_string();
		}
		else
		{
			port = str.substr(1, portPos - 1).to_string();
		}
		str = str.substr(port.size() + 1, str.size());
		bool portOk = !port.empty();
		if (portOk)
		{
			try
			{
				return boost::lexical_cast<unsigned short>(port);
			}
			catch (...)
			{
				portOk = false;
			}
		}
		if (!portOk)
		{
			throw CUrlParsingError("Port parsing error");
		}
	}
	return  0;
}

Protocol CHttpUrl::ParseProtocol(boost::string_ref & str)
{
	const string schemeDelimiter = "://";
	auto schemePos = str.find(schemeDelimiter);
	if (schemePos == boost::string_ref::npos)
	{
		throw CUrlParsingError("Protocol parsing error");
	}
	string protocol = str.substr(0, schemePos).to_string();

	str = str.substr(schemePos + schemeDelimiter.size() , str.size() - 1);

	return ToProtocol(protocol);
}

				bool HttpAbpBaseFilter::IsMatch(boost::string_ref data, const HttpAbpFilterSettings dataSettings, boost::string_ref dataHost) const
				{
					if (!SettingsApply(dataSettings, m_settings))
					{
						return false;
					}

					size_t i = 0;

					auto len = m_ruleParts.size();

					size_t lastMatch = 0;

					for (i = 0; i < m_ruleParts.size(); ++i)
					{
						switch (m_rulePartTypes[i])
						{
							// Anchored address matching is basically a confusing way to say that we
							// must match against the host of the request, AFAIK.
							// 
							// However, we have a double wammy. If we match against the host, we
							// need to then find that same matched string in the full request and
							// substring the data from beyond our matched address string. This is a
							// PITA and a bit of a waste, but we check the dataHost member first
							// specifically, to avoid false positives, such as Google search results
							// that embed a URL we're trying to match against in GET parameters.
							case RulePartType::AnchoredAddress:
							{
								auto hostLen = dataHost.size();
								auto plen = m_ruleParts[i].size();
								if (plen <= hostLen)
								{
									auto res = dataHost.find(m_ruleParts[i]);

									if (res != boost::string_ref::npos)
									{
										auto hostInReqPos = data.find(dataHost);

										if (hostInReqPos != boost::string_ref::npos)
										{
											lastMatch = hostInReqPos + res + plen;
											continue;
										}
									}
								}

								return false;
							}
							break;

							case RulePartType::Wildcard:
							{
								// Wildcard, so as long as we have one additional character, we can move on.
								if (lastMatch + 1 <= data.size())
								{
									++lastMatch;
									continue;
								}

								return false;
							}
							break;

							case RulePartType::Separator:
							{
								if (lastMatch < data.size())
								{
									data = data.substr(lastMatch);

									auto sepPosition = data.find_first_of(SeparatorStrRef);

									if (sepPosition != boost::string_ref::npos)
									{
										lastMatch = sepPosition + 1;
										continue;
									}
								}	
								
								return false;
							}
							break;

							case RulePartType::StringLiteral:
							{
								if (lastMatch < data.size())
								{
									data = data.substr(lastMatch);
									size_t literalTextPosition = data.find(m_ruleParts[i]);

									if(literalTextPosition != boost::string_ref::npos)
									{
										lastMatch = literalTextPosition + m_ruleParts[i].size();
										continue;
									}
								}
								
								return false;
							}
							break;

//.........这里部分代码省略.........