expresscpp/src/path_to_regexp.cpp at master · deimi/expresscpp · GitHub

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#include "expresscpp/path_to_regexp.hpp"

#include <algorithm>

#include <stdexcept>

#define EXPRESSCPP_CONFIG_DEBUG_PATH_TO_REGEX 0

#if defined(EXPRESSCPP_CONFIG_DEBUG_PATH_TO_REGEX)

#include <iostream>

#endif

namespace expresscpp {

using namespace std::string_literals;

std::string pathToRegExpString(std::string_view registered_path, std::vector<Key>& keys, PathToRegExpOptions op,

std::string_view parent_path) {

std::string regex = std::string("^") + parent_path.data() + registered_path.data();

size_t key_index = 0;

std::string::size_type start_pos = 0;

while (start_pos != std::string::npos) {

start_pos = regex.find(':', start_pos);

if (start_pos != std::string::npos) {

const auto dash_end_pos = regex.find('-', start_pos);

const auto next_end_pos = regex.find(':', start_pos + 1);

const auto slash_end_pos = regex.find('/', start_pos);

const auto end_pos = std::min(std::min(dash_end_pos, slash_end_pos), next_end_pos);

Key tmp_key;

const auto key_name = regex.substr(start_pos + 1, end_pos - start_pos - 1);

if (key_name.empty()) {

throw std::runtime_error(std::string("Empty parameter name found in path: ") + registered_path.data());

}

tmp_key.index_ = key_index++;

tmp_key.name_ = key_name;

regex.replace(start_pos, end_pos - start_pos, "(\\S+)");

keys.emplace_back(tmp_key);

}

if (op.end) {

regex += "$";

} else if (op.strict) {

regex += "/\\S*";

} else {

regex += "\\S*";

}

#if EXPRESSCPP_CONFIG_DEBUG_PATH_TO_REGEX

if (keys.size() > 0) {

std::cout << "printing keys ***********************" << std::endl;

for (const auto& k : keys) {

std::cout << "key found : "

<< "\"" << k.name_ << "\"" << std::endl;

}

std::cout << "printing keys **********************" << std::endl;

}

#endif

return regex;

}

} // namespace expresscpp

expresscpp/src/path_to_regexp.cpp at master · deimi/expresscpp · GitHub

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