expresscpp/src/router.cpp at master · hpsware/expresscpp · GitHub

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#include "expresscpp/router.hpp"

#include <functional>

#include <memory>

#include "boost/algorithm/string.hpp"

#include "boost/uuid/uuid_generators.hpp"

#include "boost/uuid/uuid_io.hpp"

#include "expresscpp/console.hpp"

#include "expresscpp/impl/utils.hpp"

#include "expresscpp/layer.hpp"

using namespace std::literals;

namespace expresscpp {

Router::Router() {

Init();

}

Router::Router(std::string_view name) : name_(name) {

Init();

}

void Router::Init() {

timestamp_ = std::chrono::system_clock::now();

uuid_ = boost::uuids::random_generator()();

Console::Debug(fmt::format("Router \"{}\" created, uuid \"{}\"", name_, boostUUIDToString(uuid_)));

}

std::vector<std::shared_ptr<Layer>> Router::stack() const {

return stack_;

}

void Router::Use(std::string_view registered_path, handler_wn_t handler) {

Console::Debug(fmt::format("use \"{}\" registered", registered_path));

PathToRegExpOptions op{ this->caseSensitive, true, false};

auto layer = std::make_shared<Layer>(registered_path, op, parent_path_, handler);

stack_.emplace_back(layer);

}

void Router::Use(handler_wn_t handler) {

Console::Debug(fmt::format("use middleware"));

PathToRegExpOptions op{ this->caseSensitive, false, false};

auto layer = std::make_shared<Layer>("/", op, parent_path_, handler);

stack_.emplace_back(layer);

}

void Router::RegisterPath(std::string_view registered_path, const HttpMethod method, handler_wn_t handler) {

auto route = CreateRoute(registered_path);

Console::Debug(fmt::format("registering path \"{}\"", registered_path));

PathToRegExpOptions op;

auto layer = std::make_shared<Layer>("/", op, parent_path_, handler);

layer->SetMethod(method);

route->methods_.insert(method);

route->stack_.emplace_back(layer);

}

void Router::Use(std::string_view path, std::shared_ptr<Router> router) {

Console::Debug(fmt::format("adding router to path: \"{}\"", path));

const auto parent_path = fmt::format("{}{}", parent_path_, path);

router->SetParentPath(parent_path);

PathToRegExpOptions op{ this->caseSensitive, true, false};

auto layer = std::make_shared<Layer>(path, op, parent_path_,

[router](auto req, auto res, auto /*n*/) { router->HandleRequest(req, res); });

stack_.emplace_back(layer);

}

void Router::Next(std::shared_ptr<Request> req, std::shared_ptr<Response> /*res*/, std::shared_ptr<std::string> err) {

if (err != nullptr) {

Console::Error(fmt::format("next error: {}", *err));

return;

}

while (req->match != true && req->idx < stack_.size()) {

req->current_layer = stack_[req->idx++];

req->match = req->current_layer->Match(req);

req->current_route = req->current_layer->GetRoute();

// no match

if (req->match == false) {

Console::Debug(

fmt::format("no match for path \"{}\", layer \"{}\"", req->getPath(), req->current_layer->GetPath()));

continue;

}

if (!req->current_route) {

// process non-route handlers normally

break;

}

const auto method = req->getMethod();

const auto has_method = req->current_route->HasMethod(method);

// don't even bother matching route

if (!has_method && method != HttpMethod::Head) {

req->match = false;

continue;

}

void Router::HandleRequest(std::shared_ptr<Request> req, std::shared_ptr<Response> res) {

assert(req != nullptr);

assert(res != nullptr);

Console::Debug(fmt::format("dispatching request path: \"{}\", method \"{}\"", req->getPath(),

getHttpMethodName(req->getMethod())));

// find next matching layer

req->idx = 0;

Next(req, res);

NextRouter next_handler(this, req, res);

while (req->match == true) {

req->match = false;

req->current_layer->HandleRequest(req, res, next_handler);

// will be reset to true in the next() function if there is another matching layer

}

Console::Debug(fmt::format(R"(finished request: "{}", "{}")", getHttpMethodName(req->getMethod()), req->getPath()));

}

void Router::SetParentPath(const std::string& parent_path) {

for (auto layer : stack_) {

layer->SetParentPath(parent_path);

}

parent_path_ = parent_path;

}

auto Router::GetRouter() {

Console::Debug("getting a router");

auto r = std::make_shared<Router>();

return r;

}

auto Router::GetRouter(std::string_view name) {

Console::Debug(fmt::format("getting a router{}", name));

auto r = std::make_shared<Router>(name);

return r;

}

std::shared_ptr<Route> Router::CreateRoute(const std::string_view registered_path) {

// create route

auto r = std::make_shared<Route>(registered_path);

// create layer and add it to the stack

PathToRegExpOptions op{ this->caseSensitive, true, true};

std::shared_ptr<Layer> l =

std::make_shared<Layer>(registered_path, op, parent_path_, [&](auto req, auto res, auto next) {

Console::Debug("lambda called");

l->GetRoute()->Dispatch(req, res, next);

});

// add route to the layer

l->SetRoute(r);

stack_.emplace_back(l);

return r;

}

std::string_view Router::GetName() const {

return name_;

}

} // namespace expresscpp

expresscpp/src/router.cpp at master · hpsware/expresscpp · GitHub

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