spring.travel.site.auth.CookieDecoder.java Source code

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Here is the source code for spring.travel.site.auth.CookieDecoder.java

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/**
 * Copyright 2014 Andy Godwin
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package spring.travel.site.auth;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.Arrays;
import java.util.Collections;
import java.util.Map;
import java.util.stream.Collectors;

@Component
public class CookieDecoder {

    @Autowired
    private Verifier verifier;

    public Map<String, String> decode(String cookie) throws AuthException {
        String[] parts = cookie.split("-", 2);
        if (parts.length != 2) {
            return Collections.emptyMap();
        }

        String signature = parts[0];
        String encoded = parts[1];

        if (!verifier.verify(encoded, signature)) {
            return Collections.emptyMap();
        }

        return Arrays.asList(encoded.split("&")).stream().map(keyValue -> keyValue.split("=")).collect(
                Collectors.toMap(arr -> urlDecode(arr[0]), arr -> arr.length > 1 ? urlDecode(arr[1]) : ""));
    }

    private String urlDecode(String arg) {
        try {
            return URLDecoder.decode(arg, "UTF-8");
        } catch (UnsupportedEncodingException bogus) {
            return arg;
        }
    }
}