在c++中编码已解码的urls

#include <iostream>
#include <cctype>
#include <iomanip>
#include <sstream>

std::string urlEncode(const std::string& url) {
    std::ostringstream encoded;
    encoded.fill('0');
    encoded << std::hex;

    for (char c : url) {
        if (std::isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~') {
            encoded << c;
        } else {
            encoded << '%' << std::setw(2) << int(static_cast<unsigned char>(c));
        }
    }

    return encoded.str();
}

int main() {
    std::string url = "https://example.com/path with spaces";
    std::string encodedUrl = urlEncode(url);

    std::cout << "Encoded URL: " << encodedUrl << std::endl;

    return 0;
}

Encoded URL: https://example.com/path%20with%20spaces

#include <iostream>
#include <cctype>
#include <sstream>

std::string urlDecode(const std::string& url) {
    std::ostringstream decoded;

    for (std::istringstream iss(url); !iss.eof();) {
        char c;
        iss.get(c);

        if (c == '%') {
            char hex[3];
            iss.get(hex, 3);

            if (std::isxdigit(hex[0]) && std::isxdigit(hex[1])) {
                int value = std::stoi(hex, nullptr, 16);
                decoded << static_cast<char>(value);
            } else {
                decoded << '%' << hex;
            }
        } else {
            decoded << c;
        }
    }

    return decoded.str();
}

int main() {
    std::string url = "https://example.com/path%20with%20spaces";
    std::string decodedUrl = urlDecode(url);

    std::cout << "Decoded URL: " << decodedUrl << std::endl;

    return 0;
}

Decoded URL: https://example.com/path with spaces