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annotate src/luan/modules/HtmlLuan.java @ 1506:d80395468b4e

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ssl security in code
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 15 May 2020 18:29:47 -0600
parents 21f5edab1fbf
children 36c28be6d432
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 package luan.modules;
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2
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3 import java.util.List;
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4 import java.util.ArrayList;
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5 import java.util.Arrays;
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6 import java.util.Set;
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7 import java.util.HashSet;
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8 import java.util.Map;
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9 import java.util.regex.Pattern;
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10 import java.util.regex.Matcher;
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11 import luan.Luan;
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12 import luan.LuanTable;
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13 import luan.LuanException;
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15
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16 public final class HtmlLuan {
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17
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18 public static String encode(String s) throws LuanException {
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19 Utils.checkNotNull(s);
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20 final char[] a = s.toCharArray();
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21 StringBuilder buf = new StringBuilder();
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22 for( char c : a ) {
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23 switch(c) {
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24 case '&':
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25 buf.append("&amp;");
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26 break;
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27 case '<':
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28 buf.append("&lt;");
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29 break;
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30 case '>':
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31 buf.append("&gt;");
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32 break;
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33 case '"':
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34 buf.append("&quot;");
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35 break;
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36 default:
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37 buf.append(c);
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38 }
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39 }
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40 return buf.toString();
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41 }
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42
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43 private static final Pattern entityPtn = Pattern.compile(
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44 "&#(\\d+);"
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45 );
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46
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47 public static String decode(String s) {
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48 StringBuffer buf = new StringBuffer();
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49 Matcher m = entityPtn.matcher(s);
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50 while( m.find() ) {
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51 String entity = new String(new char[]{(char)Integer.parseInt(m.group(1))});
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52 m.appendReplacement(buf,entity);
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53 }
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54 m.appendTail(buf);
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55 s = buf.toString();
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56 s = s.replace("&nbsp;"," ");
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57 s = s.replace("&quot;","\"");
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58 s = s.replace("&gt;",">");
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59 s = s.replace("&lt;","<");
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60 s = s.replace("&amp;","&");
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61 return s;
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62 }
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64 public static String quote(String s) {
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65 StringBuilder buf = new StringBuilder();
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66 buf.append('"');
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67 int i = 0;
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68 while(true) {
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69 int i2 = s.indexOf('"',i);
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70 if( i2 == -1 ) {
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71 buf.append(s.substring(i));
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72 break;
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73 } else {
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74 buf.append(s.substring(i,i2));
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75 buf.append("&quot;");
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76 i = i2 + 1;
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77 }
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78 }
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79 buf.append('"');
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80 return buf.toString();
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81 }
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83 }