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Copy pathhttp_router.hpp
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227 lines (201 loc) · 7.22 KB
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#pragma once
#include <vector>
#include <map>
#include <unordered_map>
#include <string>
#include <string_view>
#include "request.hpp"
#include "response.hpp"
#include "utils.hpp"
#include "function_traits.hpp"
#include "mime_types.hpp"
#include "memento.hpp"
#include "session.hpp"
namespace cinatra {
class http_router {
public:
template<http_method... Is, typename Function, typename... Ap>
std::enable_if_t<!std::is_member_function_pointer_v<Function>> register_handler(std::string_view name, Function&& f, Ap&&... ap) {
if (name == "/*"sv) {
assert("register error");
return;
}
if (name.back() == '*') {
memento::pathinfo_mem.push_back(std::string_view(name.data(), name.length()-1));
}
if constexpr(sizeof...(Is) > 0) {
auto arr = get_arr<Is...>(name);
for (auto& s : arr) {
register_nonmember_func(name, s, std::forward<Function>(f), std::forward<Ap>(ap)...);
}
}
else {
register_nonmember_func(name, std::string(name.data(), name.length()), std::forward<Function>(f), std::forward<Ap>(ap)...);
}
}
template <http_method... Is, class T, class Type, typename T1, typename... Ap>
std::enable_if_t<std::is_same_v<T*, T1>> register_handler(std::string_view name, Type (T::* f)(request&, response&), T1 t, Ap&&... ap) {
register_handler_impl<Is...>(name, f, t, std::forward<Ap>(ap)...);
}
template <http_method... Is, class T, class Type, typename... Ap>
void register_handler(std::string_view name, Type(T::* f)(request&, response&), Ap&&... ap) {
register_handler_impl<Is...>(name, f, (T*)nullptr, std::forward<Ap>(ap)...);
}
void remove_handler(std::string name) {
this->map_invokers_.erase(name);
}
//elimate exception, resut type bool: true, success, false, failed
bool route(std::string_view method, std::string_view url, request& req, response& res) {
std::string key(method.data(), method.length());
bool is_static_res_flag = false;
if (url.rfind('.') == std::string_view::npos) {
url = url.length()>1 && url.back()=='/' ? url.substr(0,url.length()-1):url;
auto pos = url.rfind("index"sv);
if (pos != std::string_view::npos)
key += url.substr(0, pos == 1 ? 1 : pos - 1);
else
key += std::string(url.data(), url.length());
}
else {
key += std::string(STAIC_RES.data(), STAIC_RES.length());
is_static_res_flag = true;
}
auto it = map_invokers_.find(key);
if (it == map_invokers_.end()) {
return get_wildcard_function(key, req, res);
}
if(is_static_res_flag==false)
session_manager::check_expire();
it->second(req, res);
return true;
}
private:
bool get_wildcard_function(const std::string& key, request& req, response& res) {
for (auto& pair : wildcard_invokers_) {
if (key.find(pair.first) != std::string::npos) {
pair.second(req, res);
return true;
}
}
return false;
}
template <http_method... Is, class T, class Type, typename T1, typename... Ap>
void register_handler_impl(std::string_view name, Type T::* f, T1 t, Ap&&... ap) {
if constexpr(sizeof...(Is) > 0) {
auto arr = get_arr<Is...>(name);
for (auto& s : arr) {
register_member_func(name, s, f, t, std::forward<Ap>(ap)...);
}
}
else {
register_member_func(name, std::string(name.data(), name.length()), f, t, std::forward<Ap>(ap)...);
}
}
template<typename Function, typename... AP>
void register_nonmember_func(std::string_view raw_name, const std::string& name, Function f, AP&&... ap) {
if (raw_name.back()=='*') {
this->wildcard_invokers_[name.substr(0, name.size() - 2)] = std::bind(&http_router::invoke<Function, AP...>, this,
std::placeholders::_1, std::placeholders::_2, std::move(f), std::move(ap)...);
}
else {
this->map_invokers_[name] = std::bind(&http_router::invoke<Function, AP...>, this,
std::placeholders::_1, std::placeholders::_2, std::move(f), std::move(ap)...);
}
}
template<typename Function, typename... AP>
void invoke(request& req, response& res, Function f, AP... ap) {
using result_type = std::result_of_t<Function(request&, response&)>;
std::tuple<AP...> tp(std::move(ap)...);
bool r = do_ap_before(req, res, tp);
if (!r)
return;
if constexpr(std::is_void_v<result_type>) {
//business
f(req, res);
//after
do_void_after(req, res, tp);
}
else {
//business
result_type result = f(req, res);
//after
do_after(std::move(result), req, res, tp);
}
}
template<typename Function, typename Self, typename... AP>
void register_member_func(std::string_view raw_name, const std::string& name, Function f, Self self, AP&&... ap) {
if (raw_name.back() == '*') {
this->wildcard_invokers_[name.substr(0, name.size() - 2)] = std::bind(&http_router::invoke_mem<Function, Self, AP...>, this,
std::placeholders::_1, std::placeholders::_2, f, self, std::move(ap)...);
}
else {
this->map_invokers_[name] = std::bind(&http_router::invoke_mem<Function, Self, AP...>, this,
std::placeholders::_1, std::placeholders::_2, f, self, std::move(ap)...);
}
}
template<typename Function, typename Self, typename... AP>
void invoke_mem(request& req, response& res, Function f, Self self, AP... ap) {
using result_type = typename timax::function_traits<Function>::result_type;
std::tuple<AP...> tp(std::move(ap)...);
bool r = do_ap_before(req, res, tp);
if (!r)
return;
using nonpointer_type = std::remove_pointer_t<Self>;
if constexpr(std::is_void_v<result_type>) {
//business
if(self)
(*self.*f)(req, res);
else
(nonpointer_type{}.*f)(req, res);
//after
do_void_after(req, res, tp);
}
else {
//business
result_type result;
if (self)
result = (*self.*f)(req, res);
else
result = (nonpointer_type{}.*f)(req, res);
//after
do_after(std::move(result), req, res, tp);
}
}
template<typename Tuple>
bool do_ap_before(request& req, response& res, Tuple& tp) {
bool r = true;
for_each_l(tp, [&r, &req, &res](auto& item) {
if (!r)
return;
constexpr bool has_befor_mtd = has_before<decltype(item), request&, response&>::value;
if constexpr (has_befor_mtd)
r = item.before(req, res);
}, std::make_index_sequence<std::tuple_size_v<Tuple>>{});
return r;
}
template<typename Tuple>
void do_void_after(request& req, response& res, Tuple& tp) {
bool r = true;
for_each_r(tp, [&r, &req, &res](auto& item) {
if (!r)
return;
constexpr bool has_after_mtd = has_after<decltype(item), request&, response&>::value;
if constexpr (has_after_mtd)
r = item.after(req, res);
}, std::make_index_sequence<std::tuple_size_v<Tuple>>{});
}
template<typename T, typename Tuple>
void do_after(T&& result, request& req, response& res, Tuple& tp) {
bool r = true;
for_each_r(tp, [&r, result = std::move(result), &req, &res](auto& item){
if (!r)
return;
if constexpr (has_after<decltype(item), T, request&, response&>::value)
r = item.after(std::move(result), req, res);
}, std::make_index_sequence<std::tuple_size_v<Tuple>>{});
}
typedef std::function<void(request&, response&)> invoker_function;
std::map<std::string, invoker_function> map_invokers_;
std::unordered_map<std::string, invoker_function> wildcard_invokers_; //for url/*
};
}