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97 lines
2.6 KiB
Java
97 lines
2.6 KiB
Java
package org.gcube.portlets.user.geoportaldataviewer.server.util;
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import java.io.UnsupportedEncodingException;
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import java.net.URL;
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import java.net.URLDecoder;
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import java.util.LinkedHashMap;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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/**
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* The Class URLUtil.
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*
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* @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
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*
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* Oct 29, 2020
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*/
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public class URLParserUtil {
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/**
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* Adds the parameter to query string.
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*
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* @param key the key
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* @param value the value
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* @param prefixAmpersand the prefix ampersand
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* @param suffixAmpersand the suffix ampersand
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* @return the string
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*/
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public static String addParameterToQueryString(String key, String value, boolean prefixAmpersand,
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boolean suffixAmpersand) {
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String queryParameter = "";
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if (prefixAmpersand)
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queryParameter += "&";
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queryParameter += key + "=" + value;
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if (suffixAmpersand)
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queryParameter += "&";
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return queryParameter;
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}
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/**
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* Extract value of parameter from URL.
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*
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* @param paramName the param name
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* @param url the url
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* @return the string
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*/
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public static String extractValueOfParameterFromURL(String paramName, String url) {
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int index = url.toLowerCase().indexOf(paramName.toLowerCase() + "="); // ADDING CHAR "=" IN TAIL TO BE SURE THAT
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// IT
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// IS A PARAMETER
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String value = "";
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if (index > -1) {
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int start = index + paramName.length() + 1; // add +1 for char '='
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String sub = url.substring(start, url.length());
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int indexOfSeparator = sub.indexOf("&");
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int end = indexOfSeparator != -1 ? indexOfSeparator : sub.length();
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value = sub.substring(0, end);
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} else
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return null;
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return value;
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}
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/**
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* Split query.
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*
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* @param url the url
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* @return the map
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* @throws UnsupportedEncodingException the unsupported encoding exception
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*/
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public static Map<String, List<String>> splitQuery(URL url) throws UnsupportedEncodingException {
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final Map<String, List<String>> query_pairs = new LinkedHashMap<String, List<String>>();
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final String[] pairs = url.getQuery().split("&");
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for (String pair : pairs) {
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final int idx = pair.indexOf("=");
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final String key = idx > 0 ? URLDecoder.decode(pair.substring(0, idx), "UTF-8") : pair;
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if (!query_pairs.containsKey(key)) {
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query_pairs.put(key, new LinkedList<String>());
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}
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final String value = idx > 0 && pair.length() > idx + 1
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? URLDecoder.decode(pair.substring(idx + 1), "UTF-8")
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: null;
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query_pairs.get(key).add(value);
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}
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return query_pairs;
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}
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}
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