Implement code that splits version infos.

According to the docs, the version info is
something like LALALA/X.X with X being a single digit.

src/CMakeLists.txt

@@ -23,3 +23,6 @@ target_link_libraries(${PROJECT_NAME}
 	PRIVATE ${Boost_LIBRARIES}
 	PRIVATE incredis
 )
+target_compile_definitions(${PROJECT_NAME}
+	PRIVATE BOOST_SPIRIT_USE_PHOENIX_V3=1
+)

src/cgi_env.cpp

@@ -1,8 +1,69 @@
 #include "cgi_env.hpp"
 #include "envy.hpp"
 #include "duckhandy/lexical_cast.hpp"
+#include <cassert>
+#include <ciso646>
+#include <boost/spirit/include/qi_core.hpp>
+#include <boost/spirit/include/qi_numeric.hpp>
+#include <boost/spirit/include/qi_plus.hpp>
+#include <boost/spirit/include/qi_raw.hpp>
+#include <boost/spirit/include/qi_lit.hpp>
+#include <boost/phoenix/object/construct.hpp>
+#include <boost/phoenix/bind/bind_member_function.hpp>
+#include <boost/phoenix/operator.hpp>
+#include <boost/fusion/adapted/struct.hpp>
+#include <boost/phoenix/stl/container.hpp>
+
+BOOST_FUSION_ADAPT_STRUCT(
+	tawashi::CGIEnv::VersionInfo,
+	(boost::string_ref, name)
+	(uint16_t, major)
+	(uint16_t, minor)
+);
 
 namespace tawashi {
+	namespace {
+		boost::optional<CGIEnv::VersionInfo> split_version (const std::string& parString) {
+			namespace px = boost::phoenix;
+
+			using boost::spirit::ascii::space;
+			using boost::spirit::qi::raw;
+			using boost::spirit::qi::char_;
+			using boost::spirit::qi::int_;
+			using boost::string_ref;
+			using VerNum = boost::spirit::qi::uint_parser<uint16_t, 10, 1, 1>;
+			using RuleType = boost::spirit::qi::rule<std::string::const_iterator, string_ref(), boost::spirit::ascii::space_type>;
+			using boost::spirit::_1;
+			using boost::spirit::qi::_val;
+			using boost::phoenix::begin;
+			using boost::phoenix::size;
+			using boost::phoenix::construct;
+			using boost::make_optional;
+			using boost::optional;
+
+			assert(not parString.empty());
+
+			auto beg = parString.cbegin();
+			RuleType protocol = raw[+(char_ - '/')][_val = px::bind(&string_ref::substr, construct<string_ref>(px::ref(parString)), begin(_1) - px::ref(beg), size(_1))];
+			VerNum ver_num;
+
+			auto it_curr = parString.cbegin();
+			CGIEnv::VersionInfo retval;
+			const bool parse_ret = boost::spirit::qi::phrase_parse(
+				it_curr,
+				parString.end(),
+				protocol >> '/' >> ver_num >> '.' >> ver_num,
+				space,
+				retval
+			);
+
+			if (parse_ret and parString.end() == it_curr)
+				return make_optional(retval);
+			else
+				return optional<CGIEnv::VersionInfo>();
+		}
+	} //unnamed namespace
+
 	CGIEnv::CGIEnv() :
 		m_cgi_env(get_cgi_vars())
 	{
@@ -24,7 +85,8 @@ namespace tawashi {
 		return m_cgi_env[CGIVars::CONTENT_TYPE];
 	}
 
-	VersionInfo CGIEnv::gateway_interface() const {
+	auto CGIEnv::gateway_interface() const -> boost::optional<VersionInfo> {
+		return split_version(m_cgi_env[CGIVars::GATEWAY_INTERFACE]);
 	}
 
 	const std::string& CGIEnv::path_info() const {
@@ -73,10 +135,19 @@ namespace tawashi {
 		return (value.empty() ? 0U : lexical_cast<uint16_t>(value));
 	}
 
-	VersionInfo CGIEnv::server_protocol() const {
+	auto CGIEnv::server_protocol() const -> boost::optional<VersionInfo> {
+		return split_version(m_cgi_env[CGIVars::SERVER_PROTOCOL]);
 	}
 
 	const std::string& CGIEnv::server_software() const {
 		return m_cgi_env[CGIVars::SERVER_SOFTWARE];
 	}
+
+	std::ostream& CGIEnv::print_all (std::ostream& parStream, const char* parNewline) const {
+		for (std::size_t z = 0; z < m_cgi_env.size(); ++z) {
+			parStream << CGIVars::_from_integral(z) <<
+				" = \"" << m_cgi_env[z] << '"' << parNewline;
+		}
+		return parStream;
+	}
 } //namespace tawashi

src/cgi_env.hpp

@@ -5,23 +5,25 @@
 #include <string>
 #include <boost/utility/string_ref.hpp>
 #include <cstdint>
+#include <iostream>
+#include <boost/optional.hpp>
 
 namespace tawashi {
-	struct VersionInfo {
-		boost::string_ref name;
-		uint16_t major;
-		uint16_t minor;
-	};
-
 	class CGIEnv {
 	public:
+		struct VersionInfo {
+			boost::string_ref name;
+			uint16_t major;
+			uint16_t minor;
+		};
+
 		CGIEnv();
 		~CGIEnv() noexcept;
 
 		const std::string& auth_type() const;
 		std::size_t content_length() const;
 		const std::string& content_type() const;
-		VersionInfo gateway_interface() const;
+		boost::optional<VersionInfo> gateway_interface() const;
 		const std::string& path_info() const;
 		const std::string& path_translated() const;
 		KeyValueList query_string() const;
@@ -33,9 +35,11 @@ namespace tawashi {
 		const std::string& script_name() const;
 		const std::string& server_name() const;
 		uint16_t server_port() const;
-		VersionInfo server_protocol() const;
+		boost::optional<VersionInfo> server_protocol() const;
 		const std::string& server_software() const;
 
+		std::ostream& print_all (std::ostream& parStream, const char* parNewline) const;
+
 	private:
 		std::vector<std::string> m_cgi_env;
 	};

src/main.cpp

@@ -29,13 +29,15 @@ int main() {
 	std::cout << "\n<br>\n";
 	std::cout << "Content length: \"" << in_len << "\"\n<br>\n";
 
-	//for (std::size_t z = 0; z < env.size(); ++z) {
-	//	std::cout << tawashi::CGIVars::_from_integral(z) << " = \"" << env[z] << "\"<br>\n";
-	//}
+	cgi_env.print_all(std::cout, "<br>\n");
 	std::string input;
 	if (in_len > 0)
 		std::copy_n(std::istream_iterator<char>(std::cin), in_len, std::back_inserter(input));
 	std::cout << input << '\n';
 
+	auto ver = cgi_env.gateway_interface();
+	if (ver)
+		std::cout << ver->name << " - v" << ver->major << ',' << ver->minor << "<br>\n";
+
 	return 0;
 }