io.socket.engineio.server.utils.ParseQS Maven / Gradle / Ivy

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package io.socket.engineio.server.utils;


import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Map;
import java.util.stream.Collectors;

public interface ParseQS {

    static String encode(Map query) {
        return query.entrySet().stream()
                .map(entry -> {
                    try {
                        return URLEncoder.encode(entry.getKey(), StandardCharsets.UTF_8.name()) +
                                ((entry.getValue() != null && !entry.getValue().equals("")) ?
                                        ("=" + URLEncoder.encode(entry.getValue(), StandardCharsets.UTF_8.name())) : "");
                    } catch (UnsupportedEncodingException ignore) {
                        throw new RuntimeException("This will never happen");
                    }
                })
                .reduce((s1, s2) -> s1 + "&" + s2)
                .orElse("");
    }

    static Map decode(String qs) {
        return Arrays.stream(qs.split("&"))
                .map(s -> s.split("="))
                .collect(Collectors.toMap(
                        s -> {
                            try {
                                return URLDecoder.decode(s[0], StandardCharsets.UTF_8.name());
                            } catch (UnsupportedEncodingException ignore) {
                                throw new RuntimeException("This will never happen");
                            }
                        },
                        s -> {
                            try {
                                return (s.length > 1) ? URLDecoder.decode(s[1], StandardCharsets.UTF_8.name()) : "";
                            } catch (UnsupportedEncodingException ignore) {
                                throw new RuntimeException("This will never happen");
                            }
                        }));
    }
}