| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. The ASF licenses this file to You |
| * 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. For additional information regarding |
| * copyright in this work, please see the NOTICE file in the top level |
| * directory of this distribution. |
| */ |
| |
| package org.apache.roller.weblogger.util; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.net.URLDecoder; |
| import java.net.URLEncoder; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| |
| /** |
| * Some utility methods used when dealing with urls. |
| */ |
| public final class URLUtilities { |
| |
| // non-instantiable |
| private URLUtilities() {} |
| |
| |
| /** |
| * Compose a map of key=value params into a query string. |
| */ |
| public static String getQueryString(Map<String, String> params) { |
| |
| if(params == null) { |
| return null; |
| } |
| |
| StringBuilder queryString = new StringBuilder(); |
| for (Map.Entry<String, String> entry : params.entrySet()) { |
| |
| if (queryString.length() == 0) { |
| queryString.append("?"); |
| } else { |
| queryString.append("&"); |
| } |
| |
| queryString.append(entry.getKey()); |
| queryString.append("="); |
| queryString.append(entry.getValue()); |
| } |
| |
| return queryString.toString(); |
| } |
| |
| |
| /** |
| * URL encode a string using UTF-8. |
| */ |
| public static String encode(String str) { |
| String encodedStr = str; |
| try { |
| encodedStr = URLEncoder.encode(str, "UTF-8"); |
| } catch (UnsupportedEncodingException ex) { |
| // ignored |
| } |
| return encodedStr; |
| } |
| |
| |
| /** |
| * URL decode a string using UTF-8. |
| */ |
| public static String decode(String str) { |
| String decodedStr = str; |
| try { |
| decodedStr = URLDecoder.decode(str, "UTF-8"); |
| } catch (UnsupportedEncodingException ex) { |
| // ignored |
| } |
| return decodedStr; |
| } |
| |
| |
| public static String getEncodedTagsString(List tags) { |
| StringBuilder tagsString = new StringBuilder(); |
| if(tags != null && tags.size() > 0) { |
| String tag; |
| Iterator tagsIT = tags.iterator(); |
| |
| // do first tag |
| tag = (String) tagsIT.next(); |
| tagsString.append(encode(tag)); |
| |
| // do rest of tags, joining them with a '+' |
| while(tagsIT.hasNext()) { |
| tag = (String) tagsIT.next(); |
| tagsString.append("+"); |
| tagsString.append(encode(tag)); |
| } |
| } |
| return tagsString.toString(); |
| } |
| |
| |
| /** |
| * URL encode a path string using UTF-8. The path separator '/' will not be encoded |
| */ |
| public static String encodePath(String path) { |
| int i = path.indexOf('/'); |
| StringBuilder sb = new StringBuilder(); |
| while (i != -1) { |
| sb.append(encode(path.substring(0, i))).append('/'); |
| path = path.substring(i + 1); |
| i = path.indexOf('/'); |
| } |
| sb.append(encode(path)); |
| return sb.toString(); |
| } |
| } |
| |
| |