Add CurlWrapper class and use it to escape GET/POST values.

Use the new code to print the values from the request.

src/CMakeLists.txt

@@ -1,6 +1,7 @@
 project(tawashi CXX)
 
 find_package(Boost 1.53.0 REQUIRED COMPONENTS program_options filesystem system)
+find_package(CURL REQUIRED)
 
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
@@ -15,15 +16,18 @@ add_executable(${PROJECT_NAME}
 	cgi_env.cpp
 	num_to_token.cpp
 	cgi_post.cpp
+	curl_wrapper.cpp
 )
 
 target_include_directories(${PROJECT_NAME} SYSTEM
 	PRIVATE ${Boost_INCLUDE_DIRS}
 	PRIVATE ${TAWASHI_SOURCE_ROOT}/lib/bette-enums
+	PRIVATE ${CURL_INCLUDE_DIR}
 )
 target_link_libraries(${PROJECT_NAME}
 	PRIVATE ${Boost_LIBRARIES}
 	PRIVATE incredis
+	${CURL_LIBRARIES}
 )
 target_compile_definitions(${PROJECT_NAME}
 	PRIVATE BOOST_SPIRIT_USE_PHOENIX_V3=1

src/cgi_env.cpp

@@ -29,7 +29,6 @@ namespace tawashi {
 			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>;
@@ -143,8 +142,14 @@ namespace tawashi {
 		return m_cgi_env[CGIVars::SERVER_SOFTWARE];
 	}
 
-	KeyValueList CGIEnv::query_string_split() const {
-		return split_env_vars(m_cgi_env[CGIVars::QUERY_STRING]);
+	CGIEnv::GetMapType CGIEnv::query_string_split() const {
+		GetMapType retval;
+		const auto urlencoded_values = split_env_vars(m_cgi_env[CGIVars::QUERY_STRING]);
+		retval.reserve(urlencoded_values.size());
+		for (auto& itm : urlencoded_values) {
+			retval[m_curl.url_unescape(itm.first)] = m_curl.url_unescape(itm.second);
+		}
+		return retval;
 	}
 
 	std::ostream& CGIEnv::print_all (std::ostream& parStream, const char* parNewline) const {

src/cgi_env.hpp

@@ -2,12 +2,14 @@
 
 #include "split_get_vars.hpp"
 #include "duckhandy/compatibility.h"
+#include "curl_wrapper.hpp"
 #include <vector>
 #include <string>
 #include <boost/utility/string_ref.hpp>
 #include <cstdint>
 #include <iostream>
 #include <boost/optional.hpp>
+#include <boost/container/flat_map.hpp>
 
 namespace tawashi {
 	class CGIEnv {
@@ -18,6 +20,8 @@ namespace tawashi {
 			uint16_t minor;
 		};
 
+		typedef boost::container::flat_map<std::string, std::string> GetMapType;
+
 		CGIEnv();
 		~CGIEnv() noexcept;
 
@@ -39,11 +43,12 @@ namespace tawashi {
 		boost::optional<VersionInfo> server_protocol() const a_pure;
 		const std::string& server_software() const;
 
-		KeyValueList query_string_split() const a_pure;
+		GetMapType query_string_split() const a_pure;
 
 		std::ostream& print_all (std::ostream& parStream, const char* parNewline) const;
 
 	private:
 		std::vector<std::string> m_cgi_env;
+		CurlWrapper m_curl;
 	};
 } //namespace tawashi

src/cgi_post.cpp

@@ -1,6 +1,7 @@
 #include "cgi_post.hpp"
 #include "cgi_env.hpp"
 #include "split_get_vars.hpp"
+#include "curl_wrapper.hpp"
 #include <iostream>
 #include <iterator>
 #include <algorithm>
@@ -31,8 +32,9 @@ namespace tawashi {
 						std::back_inserter(original_data)
 					);
 
+					CurlWrapper curl;
 					for (auto& itm : split_env_vars(original_data)) {
-						map[itm.first] = itm.second;
+						map[curl.url_unescape(itm.first)] = curl.url_unescape(itm.second);
 					}
 				}
 

src/cgi_post.hpp

@@ -1,13 +1,13 @@
 #pragma once
 
 #include <boost/container/flat_map.hpp>
-#include <boost/utility/string_ref.hpp>
+#include <string>
 
 namespace tawashi {
 	class CGIEnv;
 
 	namespace cgi {
-		typedef boost::container::flat_map<boost::string_ref, boost::string_ref> PostMapType;
+		typedef boost::container::flat_map<std::string, std::string> PostMapType;
 
 		const PostMapType& read_post (const CGIEnv& parEnv);
 	} //namespace cgi

src/curl_wrapper.cpp

@@ -0,0 +1,87 @@
+#include "curl_wrapper.hpp"
+#include <curl/curl.h>
+#include <cassert>
+#include <ciso646>
+
+#if !defined(NDEBUG)
+#	define CURL_WRAPPER_VERBOSE
+#endif
+
+#if defined(CURL_WRAPPER_VERBOSE)
+#	include <iostream>
+#endif
+
+namespace tawashi {
+	namespace {
+		struct CurlDeleter {
+			void operator() (CURL* parCurl) const {
+#if defined(CURL_WRAPPER_VERBOSE)
+				std::cout << "Deleting CURL* " << parCurl << " and cleaning up\n";
+#endif
+				assert(parCurl);
+				curl_easy_cleanup(parCurl);
+				curl_global_cleanup();
+			}
+		};
+
+		struct CurlBufferDeleter {
+			void operator() (char* parPtr) {
+				assert(parPtr);
+				curl_free(parPtr);
+			}
+		};
+
+		typedef std::unique_ptr<char, CurlBufferDeleter> CurlBufferPointer;
+
+		CurlWrapper::CurlPtr get_new_curl() {
+			static std::weak_ptr<CURL> curl;
+
+#if defined(CURL_WRAPPER_VERBOSE)
+			std::cout << "CURL object requested\n";
+#endif
+			auto shared = curl.lock();
+			if (not shared) {
+#if defined(CURL_WRAPPER_VERBOSE)
+				std::cout << "CURL weak pointer has expired! Calling curl_global_init()\n";
+#endif
+				if (curl_global_init(CURL_GLOBAL_ALL))
+					return CurlWrapper::CurlPtr();
+#if defined(CURL_WRAPPER_VERBOSE)
+				std::cout << "Calling curl_easy_init()\n";
+#endif
+				shared.reset(curl_easy_init(), CurlDeleter());
+
+				if (not shared) {
+					curl_global_cleanup();
+					return CurlWrapper::CurlPtr();
+				}
+				curl = shared;
+			}
+#if defined(CURL_WRAPPER_VERBOSE)
+			std::cout << "CURL shared pointer ready: " << shared.get() << '\n';
+#endif
+			assert(shared);
+			return shared;
+		}
+	} //unnamed namespace
+
+	CurlWrapper::CurlWrapper() :
+		m_curl(get_new_curl())
+	{
+		assert(m_curl);
+	}
+
+	CurlWrapper::~CurlWrapper() noexcept = default;
+
+	std::string CurlWrapper::url_escape (const boost::string_ref& parText) const {
+		const CurlBufferPointer buff(curl_easy_escape(m_curl.get(), parText.data(), parText.size()));
+		return std::string(buff.get());
+	}
+
+	std::string CurlWrapper::url_unescape (const boost::string_ref& parText) const {
+		int outLen;
+		const CurlBufferPointer buff(curl_easy_unescape(m_curl.get(), parText.data(), parText.size(), &outLen));
+		return std::string(buff.get(), outLen);
+	}
+} //namespace tawashi
+

src/curl_wrapper.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <boost/utility/string_ref.hpp>
+#include <string>
+#include <memory>
+
+typedef void CURL;
+
+namespace tawashi {
+	class CurlWrapper {
+	public:
+		typedef std::shared_ptr<CURL> CurlPtr;
+
+		CurlWrapper();
+		CurlWrapper (const CurlWrapper&) = delete;
+		~CurlWrapper() noexcept;
+
+		std::string url_escape (const boost::string_ref& parText) const;
+		std::string url_unescape (const boost::string_ref& parText) const;
+
+	private:
+		CurlPtr m_curl;
+	};
+} //namespace tawashi

src/main.cpp

@@ -1,10 +1,9 @@
 #include "incredis/incredis.hpp"
 #include "submit_form_response.hpp"
 #include "cgi_env.hpp"
+#include "cgi_post.hpp"
 #include <iostream>
 #include <string>
-#include <algorithm>
-#include <iterator>
 
 //www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4150.pdf
 
@@ -30,10 +29,10 @@ int main() {
 	std::cout << "Content length: \"" << in_len << "\"\n<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';
+	for (auto& itm : tawashi::cgi::read_post(cgi_env)) {
+		std::cout << "Key: \"" << itm.first << "\"<br>\nValue: \"" <<
+			itm.second << "\"<br>\n";
+	}
 
 	auto ver = cgi_env.gateway_interface();
 	if (ver)

src/split_get_vars.cpp

@@ -9,7 +9,7 @@
 #include <boost/range/algorithm/find.hpp>
 
 namespace tawashi {
-	KeyValueList split_env_vars (const std::string& parList) {
+	RawKeyValueList split_env_vars (const std::string& parList) {
 		using MatchRange = boost::iterator_range<std::string::const_iterator>;
 		using boost::token_finder;
 		using boost::adaptors::transformed;
@@ -23,7 +23,7 @@ namespace tawashi {
 		//https://stackoverflow.com/questions/27999941/how-to-use-boostsplit-with-booststring-ref-in-boost-1-55
 		//http://www.boost.org/doc/libs/1_60_0/doc/html/boost/algorithm/token_finder.html
 		//https://stackoverflow.com/questions/20781090/difference-between-boostsplit-vs-boostiter-split
-		return boost::copy_range<KeyValueList>(
+		return boost::copy_range<RawKeyValueList>(
 			make_iterator_range(
 				split_iterator<std::string::const_iterator>(parList, token_finder([](char c){return '&'==c;})),
 				split_iterator<std::string::const_iterator>()

src/split_get_vars.hpp

@@ -6,7 +6,7 @@
 #include <utility>
 
 namespace tawashi {
-	typedef std::vector<std::pair<boost::string_ref, boost::string_ref>> KeyValueList;
+	typedef std::vector<std::pair<boost::string_ref, boost::string_ref>> RawKeyValueList;
 
-	KeyValueList split_env_vars ( const std::string& parCommaSeparatedList ) a_pure;
+	RawKeyValueList split_env_vars ( const std::string& parCommaSeparatedList ) a_pure;
 } //namespace tawashi