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2 package nabble.view.web.tools;
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3
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4 import nabble.model.DailyNumber;
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5 import nabble.model.ModelException;
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6 import nabble.model.Person;
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7 import nabble.model.SystemProperties;
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8 import nabble.model.User;
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9 import nabble.view.lib.Jtp;
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10 import nabble.view.lib.Shared;
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11 import org.slf4j.Logger;
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12 import org.slf4j.LoggerFactory;
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13
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14 import javax.servlet.ServletException;
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15 import javax.servlet.http.HttpServlet;
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16 import javax.servlet.http.HttpServletRequest;
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17 import javax.servlet.http.HttpServletResponse;
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18 import java.io.IOException;
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19 import java.io.PrintWriter;
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20 import java.util.ArrayList;
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21 import java.util.List;
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22 import java.util.regex.Pattern;
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23
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24
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25 public final class SpamRules extends HttpServlet {
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26
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27 private static final Logger logger = LoggerFactory.getLogger(SpamRules.class);
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28
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29 private static final List<Rule> RULES = new ArrayList<Rule>();
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30
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31 static {
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32 String spamRules = SystemProperties.get("spam.rules");
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33 if (spamRules != null)
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34 RULES.addAll(parseRules(spamRules));
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35 }
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36
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37 private interface Rule {
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38 public String checkSubject(String subject) throws ModelException.SpamException;
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39 public String checkMessage(String message, Person visitor) throws ModelException.SpamException;
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40 }
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41 /*
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42 public static void checkSubject(HttpServletRequest request, String subject)
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43 throws ModelException.SpamException
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44 {
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45 if (subject == null)
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46 return;
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47
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48 // Removes duplicated space chars
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49 subject = subject.replaceAll("[ ]+"," ");
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50 for (Rule rule : RULES) {
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51 try {
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52 rule.checkSubject(subject);
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53 } catch (ModelException.SpamException e) {
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54 DailyNumber.blockedSpams.inc();
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55 if (request != null)
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56 logger.info("host="+request.getServerName()+" | IP=" + Jtp.getClientIpAddr(request) + " | " + e.getMessage());
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57 else
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58 logger.info("Blocked Mail | " + e.getMessage());
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59 throw e;
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60 }
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61 }
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62 }
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63
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64 public static void checkMessage(HttpServletRequest request, String message, Person visitor)
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65 throws ModelException.SpamException
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66 {
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67 if (message == null)
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68 return;
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69
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70 // Removes duplicated space chars
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71 message = message.replaceAll("[ ]+"," ");
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72 for (Rule rule : RULES) {
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73 try {
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74 rule.checkMessage(message, visitor);
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75 } catch (ModelException.SpamException e) {
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76 DailyNumber.blockedSpams.inc();
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77 String email = visitor instanceof User? ((User) visitor).getEmail() : "NO EMAIL";
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78 if (request != null)
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79 logger.info("host="+request.getServerName()+" | IP=" + Jtp.getClientIpAddr(request) + " | " + email + " | " + e.getMessage());
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80 else
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81 logger.info("Blocked Mail | " + email + " | " + e.getMessage());
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82 throw e;
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83 }
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84 }
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85 }
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86 */
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87 protected void service(HttpServletRequest request,HttpServletResponse response)
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88 throws ServletException, IOException
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89 {
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90 String spamRules = SystemProperties.get("spam.rules");
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91
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92 if ("save".equals(request.getParameter("action"))) {
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93 String rules = request.getParameter("rules");
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94 RULES.clear();
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95 if (rules != null && rules.length() > 0) {
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96 List<Rule> r = parseRules(rules);
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97 if (r.size() > 0)
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98 RULES.addAll(r);
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99 }
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100 SystemProperties.set("spam.rules", rules);
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101 response.sendRedirect("/tools/");
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102 return;
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103 }
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104
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105 PrintWriter out = response.getWriter();
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106 %>
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107 <html>
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108 <head>
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109 <script src="<%=Shared.getJQueryPath()%>"></script>
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110 <link rel="stylesheet" href="<%=Shared.getCssPath()%>" type="text/css" />
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111 </head>
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112 <body>
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113 <div>
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114 <a href="/tools/">Tools</a>
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115 </div>
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116 <h1>Spam Rules</h1>
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117 <div id="nabble" class="nabble">
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118 <form action="/tools/SpamRules.jtp" method="POST">
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119 <input type="hidden" name="action" value="save">
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120 <textarea name="rules" rows=15 style="width:80%"><%=Jtp.hideNull(spamRules)%></textarea>
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121 <br>
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122 <input type="submit" value="Save Rules">
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123 </form>
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124 </div>
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125 </body>
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126 </html>
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127 <%
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128 }
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129
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130 private static synchronized List<Rule> parseRules(String rules) {
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131 List<Rule> r = new ArrayList<Rule>();
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132 String[] lines = rules.split("\n");
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133 for (String line : lines) {
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134 if (line.length() == 0 || line.startsWith("#")) {
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135 // do nothing
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136 } else if (line.startsWith("subject-contains:"))
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137 r.add(new SubjectContainsRule(line.substring("subject-contains:".length()).trim()));
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138 else if (line.startsWith("message-contains:"))
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139 r.add(new MessageContainsRule(line.substring("message-contains:".length()).trim()));
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140 else if (line.startsWith("message-contains-pattern:"))
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141 r.add(new MessageContainsPattern(line.substring("message-contains-pattern:".length()).trim()));
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142 else if (line.startsWith("message-word-count:"))
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143 r.add(new WordCountRule(line.substring("message-word-count:".length()).trim()));
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144 else if (line.startsWith("subject-max-words:"))
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145 r.add(new SubjectMaxWordsRule(line.substring("subject-max-words:".length()).trim()));
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146 else if (line.startsWith("message-max-words:"))
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147 r.add(new MessageMaxWordsRule(line.substring("message-max-words:".length()).trim()));
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148 else if (line.startsWith("user-email-pattern:"))
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149 r.add(new UserEmailPattern(line.substring("user-email-pattern:".length()).trim()));
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150 }
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151 return r;
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152 }
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153
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154 private static class SubjectContainsRule implements Rule {
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155 private String text;
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156 private String[] parts;
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157 public SubjectContainsRule(String text) {
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158 this.text = text;
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159 this.parts = text.toLowerCase().split("\\+");
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160 }
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161 public String checkSubject(String subject)
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162 throws ModelException.SpamException
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163 {
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164 if (subject == null) return null;
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165 subject = subject.toLowerCase();
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166 for (String part : parts) {
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167 if (subject.indexOf(part) == -1)
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168 return null;
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169 }
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170 throw new ModelException.SubjectContainsInvalidWord(text);
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171 }
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172 public String checkMessage(String message, Person visitor) { return null; }
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173 }
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174
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175 private static class SubjectMaxWordsRule implements Rule {
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176 private int max;
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177 private String[] parts;
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178 public SubjectMaxWordsRule(String text) {
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179 String[] params = text.split("\\|");
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180 this.max = Integer.valueOf(params[0]);
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181 this.parts = params[1].toLowerCase().split("\\+");
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182 }
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183 public String checkSubject(String subject)
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184 throws ModelException.SpamException
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185 {
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186 if (subject == null) return null;
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187 subject = subject.toLowerCase();
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188 int count = 0;
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189 for (String part : parts) {
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190 if (subject.indexOf(part) >= 0)
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191 count++;
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192 if (count >= max)
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193 throw new ModelException.SubjectContainsCommonSpamWords(subject);
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194 }
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195 return null;
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196 }
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197 public String checkMessage(String message, Person visitor) { return null; }
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198 }
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199
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200 private static class MessageMaxWordsRule implements Rule {
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201 private int max;
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202 private String[] parts;
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203 public MessageMaxWordsRule(String text) {
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204 String[] params = text.split("\\|");
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205 this.max = Integer.valueOf(params[0]);
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206 this.parts = params[1].toLowerCase().split("\\+");
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207 }
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208 public String checkMessage(String message, Person visitor)
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209 throws ModelException.SpamException
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210 {
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211 if (message == null) return null;
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212 message = message.toLowerCase();
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213 int count = 0;
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214 for (String part : parts) {
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215 if (message.indexOf(part) >= 0)
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216 count++;
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217 if (count >= max)
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218 throw new ModelException.MessageContainsCommonSpamWords(message);
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219 }
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220 return null;
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221 }
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222 public String checkSubject(String subject) { return null; }
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223 }
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224
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225 private static class MessageContainsRule implements Rule {
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226 private String text;
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227 private String[] parts;
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228 public MessageContainsRule(String text) {
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229 this.text = text;
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230 this.parts = text.toLowerCase().split("\\+");
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231 }
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232 public String checkMessage(String message, Person visitor)
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233 throws ModelException.SpamException
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234 {
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235 if (message == null) return null;
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236 String msg = message.toLowerCase();
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237 for (String part : parts) {
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238 if (msg.indexOf(part) == -1)
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239 return null;
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240 }
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241 throw new ModelException.MessageContainsInvalidWord(text);
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242 }
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243 public String checkSubject(String subject) { return null; }
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244 }
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245
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246 private static class MessageContainsPattern implements Rule {
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247 private Pattern[] pattern;
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248 public MessageContainsPattern(String patternList) {
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249 String[] patterns = patternList.split("____");
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250 this.pattern = new Pattern[patterns.length];
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251 for (int i = 0; i < patterns.length; i++)
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252 this.pattern[i] = Pattern.compile(patterns[i]);
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253 }
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254 public String checkMessage(String message, Person visitor)
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255 throws ModelException.SpamException
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256 {
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257 if (message == null) return null;
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258 for (Pattern p : pattern) {
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259 if (!p.matcher(message).find())
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260 return null;
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261 }
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262 throw new ModelException.MessageContainsCommonSpamWords(message);
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263 }
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264 public String checkSubject(String subject) { return null; }
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265 }
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266
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267 private static class UserEmailPattern implements Rule {
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268 private Pattern pattern;
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269 public UserEmailPattern(String pattern) {
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270 this.pattern = Pattern.compile(pattern);
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271 }
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272 public String checkMessage(String message, Person visitor)
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273 throws ModelException.SpamException
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274 {
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275 if (visitor instanceof User) {
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276 String email = ((User) visitor).getEmail();
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277 if (!pattern.matcher(email).matches())
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278 return null;
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279 throw new ModelException.MessageContainsInvalidWord("EMAIL: " + email);
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280 }
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281 return null;
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282 }
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283 public String checkSubject(String subject) { return null; }
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284 }
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285
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286 private static class WordCountRule implements Rule {
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287 private String text;
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288 private int count;
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289 public WordCountRule(String value) {
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290 String[] values = value.split(">");
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291 this.text = values[0].toLowerCase();
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292 this.count = Integer.valueOf(values[1]);
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293 }
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294 public String checkMessage(String message, Person visitor)
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295 throws ModelException.SpamException
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296 {
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297 if (message == null) return null;
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298 String msg = message.toLowerCase();
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299 int oldPos = 0;
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300 int newPos = msg.indexOf(text);
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301 int c = 0;
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302 while (newPos > oldPos) {
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303 c++;
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304 if (c >= count)
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305 throw new ModelException.MessageContainsManyInvalidWords(text);
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306 oldPos = newPos;
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307 newPos = msg.indexOf(text, oldPos+text.length());
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308 }
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309 return null;
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310 }
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311 public String checkSubject(String subject) { return null; }
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312 }
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313 }
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314 %>
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