utils.cpp

// MIT License
//
// Copyright (c) 2022 Yunus Emre ÖRCÜN
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#include "utils.h"
#include <iomanip>
#include <memory>
#include <sstream>
#include <string>

namespace Scrapp {
    std::string url_encode(const std::string& value) {
        std::ostringstream escaped;
        escaped.fill('0');
        escaped << std::hex;

        for (char c : value) {
            // Keep alphanumeric and other accepted characters intact
            if (isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~') {
                escaped << c;
                continue;
            }

            // Any other characters are percent-encoded
            escaped << std::uppercase;
            escaped << '%' << std::setw(2) << int((unsigned char)c);
            escaped << std::nouppercase;
        }

        return escaped.str();
    }

    char from_hex(char ch) {
        return isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10;
    }

    std::string url_decode(std::string text) {
        char h;
        std::ostringstream escaped;
        escaped.fill('0');

        for (auto i = text.begin(), n = text.end(); i != n; ++i) {
            std::string::value_type c = (*i);

            if (c == '%') {
                if (i[1] && i[2]) {
                    h = from_hex(i[1]) << 4 | from_hex(i[2]);
                    escaped << h;
                    i += 2;
                }
            } else if (c == '+') {
                escaped << ' ';
            } else {
                escaped << c;
            }
        }

        return escaped.str();
    }
} // namespace Scrapp