| 1 | /*
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| 2 | * GSHTML.java
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| 3 | * Copyright (C) 2008 New Zealand Digital Library, http://www.nzdl.org
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| 4 | *
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| 5 | * This program is free software; you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation; either version 2 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program; if not, write to the Free Software
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| 17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 18 | */
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| 19 | package org.greenstone.gsdl3.util;
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| 20 |
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| 21 | /** GSHTML - provides some convenience methods for dealing
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| 22 | * with html
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| 23 | */
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| 24 | public class GSHTML {
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| 25 |
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| 26 | /** make a string html safe */
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| 27 | public static String htmlSafe(String input) {
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| 28 |
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| 29 | StringBuffer filtered = new StringBuffer(input.length());
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| 30 | char c;
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| 31 | for (int i=0; i<input.length(); i++) {
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| 32 | c = input.charAt(i);
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| 33 | if (c == '<') {
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| 34 | filtered.append("<");
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| 35 | } else if (c == '>') {
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| 36 | filtered.append(">");
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| 37 | } else if (c == '"') {
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| 38 | filtered.append(""");
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| 39 | } else if (c == '&') {
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| 40 | filtered.append("&");
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| 41 | } else {
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| 42 | filtered.append(c);
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| 43 | }
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| 44 | }
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| 45 | return(filtered.toString());
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| 46 | }
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| 47 | /** undo the html safe action */
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| 48 | public static String htmlUnsafe(String input) {
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| 49 | StringBuffer filtered = new StringBuffer(input.length());
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| 50 | char c;
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| 51 | for (int i=0; i<input.length(); i++) {
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| 52 | c = input.charAt(i);
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| 53 | if (c =='&') {
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| 54 | int j=input.indexOf(';', i);
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| 55 | String entity = input.substring(i, j);
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| 56 | i=j;
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| 57 | if (entity.equals("&")) {
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| 58 | filtered.append('&');
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| 59 | } else if (entity.equals("<")){
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| 60 | filtered.append('<');
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| 61 | } else if (entity.equals(">")){
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| 62 | filtered.append('>');
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| 63 | } else if (entity.equals(""")) {
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| 64 | filtered.append('"');
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| 65 | } // else just ignore it.
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| 66 | } else {
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| 67 | filtered.append(c);
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| 68 | }
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| 69 |
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| 70 | }
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| 71 | return(filtered.toString());
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| 72 | }
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| 73 |
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| 74 | /** produce a default error page */
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| 75 | public static String errorPage(String error) {
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| 76 | String page = "<html><head><Title>GSDL3 Error!</Title></head>\n"+
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| 77 | "<body><h1>Greenstone Error!</h1>"+
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| 78 | "<p/>"+error+"</body></html>";
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| 79 | return page;
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| 80 | }
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| 81 |
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| 82 | }
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