com.tek271.reverseProxy.model.Mapping.java Source code

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Here is the source code for com.tek271.reverseProxy.model.Mapping.java

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/*
This file is part of Tek271 Reverse Proxy Server.
    
Tek271 Reverse Proxy Server is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
Tek271 Reverse Proxy Server is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.
    
You should have received a copy of the GNU Lesser General Public License
along with Tek271 Reverse Proxy Server.  If not, see http://www.gnu.org/licenses/
 */
package com.tek271.reverseProxy.model;

import static org.apache.commons.lang.StringUtils.*;

import java.util.List;

import com.google.common.base.*;
import com.google.common.collect.Lists;
import static com.google.common.base.Preconditions.*;

public class Mapping {
    public final String hiddenDomain;
    public final String proxyDomain;
    public final String proxyResource;
    public final String proxy;

    public Mapping(String mapping) {
        checkArgument(isNotBlank(mapping), "mapping must contain a value");
        mapping = trimToEmpty(mapping);
        List<String> items = Lists.newArrayList(Splitter.on(',').trimResults().split(mapping));
        checkArgument(items.size() == 3, "mappings must have 3 comma-separated values");

        hiddenDomain = items.get(0);
        proxyDomain = items.get(1);
        proxyResource = items.get(2);
        proxy = proxyDomain + proxyResource;
    }

    private static final String SEP = "://";

    public String mapProxyToHidden(String proxyUrl) {
        String path = extractPath(proxyUrl, proxyDomain, proxyResource);
        return extractProtocol(proxyUrl) + SEP + hiddenDomain + path;
    }

    public String mapHiddenToProxy(String hiddenUrl) {
        String path = extractPath(hiddenUrl, hiddenDomain, "");
        return extractProtocol(hiddenUrl) + SEP + proxy + path;
    }

    private static String extractProtocol(String url) {
        return substringBefore(url, SEP);
    }

    private String extractPath(String url, String domain, String resource) {
        String prefix = domain + resource;
        return substringAfter(url, prefix);
    }

}