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2 package nabble.view.lib;
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3
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4 import fschmidt.util.java.HtmlUtils;
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5 import fschmidt.util.servlet.ServletUtils;
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6 import nabble.model.Init;
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7 import nabble.model.Site;
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8 import nabble.model.UpdatingException;
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9 import nabble.model.User;
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10 import org.eclipse.jetty.http.HttpGenerator;
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11 import org.eclipse.jetty.server.Request;
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12 import org.slf4j.Logger;
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13 import org.slf4j.LoggerFactory;
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14
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15 import javax.servlet.ServletException;
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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.io.StringWriter;
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21 import java.io.Writer;
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22
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23
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24 public final class NabbleErrorHandler extends org.eclipse.jetty.server.handler.ErrorHandler {
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25
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26 private static final Logger logger = LoggerFactory.getLogger(NabbleErrorHandler.class);
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27 private HttpServletResponse response;
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28
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29 public void handle(String string, Request request, HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws IOException {
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30 this.response = httpServletResponse;
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31 super.handle(string, request, httpServletRequest, httpServletResponse);
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32 }
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33
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34 protected void writeErrorPage(HttpServletRequest request, Writer writer, int code, String message, boolean showStacks)
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35 throws IOException
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36 {
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37 if (code == HttpServletResponse.SC_SERVICE_UNAVAILABLE) {
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38 serviceUnavailablePage(writer);
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39 return;
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40 }
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41 if (message == null)
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42 message = HttpGenerator.getReasonBuffer(code).toString();
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43
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44 Throwable throwable = (Throwable)request.getAttribute(NabbleErrorFilter.WORK_AROUND_ERROR_EXCEPTION);
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45 if (UpdatingException.isIn(throwable)) {
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46 logger.error("Updating database: "+ServletUtils.getCurrentURL(request));
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47 databaseUpdatePage(writer);
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48 return;
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49 }
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50 try {
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51 writeMyErrorPage(request,writer,code,message,showStacks, throwable);
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52 } catch (ServletException e) {
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53 logger.error(ServletUtils.getCurrentURL(request), e);
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54 throw new RuntimeException(e);
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55 } catch (RuntimeException e) {
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56 logger.error(ServletUtils.getCurrentURL(request), e);
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57 throw e;
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58 }
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59 }
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60
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61 private void writeMyErrorPage(HttpServletRequest request, Writer writer, int code, String message, boolean showStacks, Throwable throwable)
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62 throws IOException, ServletException
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63 {
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64 PrintWriter out = new PrintWriter(writer);
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65 boolean hasTweaks = false;
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66 boolean isAdmin = false;
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67 String homeLink;
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68 Site site = null;
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69 try {
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70 site = Jtp.getSite(request);
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71 } catch(RuntimeException e) {}
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72 if( site == null ) {
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73 homeLink = "<a href='" + Jtp.homePage() + "'>Nabble</a>";
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74 } else {
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75 homeLink = Jtp.link(site.getRootNode());
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76 hasTweaks = site.getCustomTweaks().size() > 0;
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77 User user = Jtp.getUser(request, response);
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78 isAdmin = user != null && (site.getRootNode().getOwner().equals(user) || Permissions.isInGroup(user, "Administrators"));
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79 }
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80
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81 out.print( "\n<html>\n <head>\n " );
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82 writeErrorPageHead(request,writer,code,message);
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83 out.print( "\n <META NAME=\"robots\" CONTENT=\"noindex,nofollow\">\n <link rel=\"stylesheet\" href=\"" );
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84 out.print( (Shared.getCssPath()) );
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85 out.print( "\" type=\"text/css\" />\n <style type=\"text/css\">\n p { margin: .3em 0 0; }\n .error-details {\n border: 1px solid gray;\n padding: .5em;\n width:90%;\n margin-left:2.5%;\n position: relative;\n overflow-x:scroll;\n }\n </style>\n </head>\n <body>\n " );
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86
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87 String uri = request.getRequestURI();
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88 if (uri!=null) {
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89 uri = HtmlUtils.htmlEncode(uri);
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90 }
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91
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92 out.print( "\n<div class=\"nabble\" id=\"nabble\">\n <div class=\"top-bar\">\n <div class=\"breadcrumbs\" style=\"float:left;\">\n " );
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93 out.print( (homeLink) );
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94 out.print( "\n </div>\n </div>\n " );
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95
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96 if (throwable != null) {
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97 if( throwable instanceof ServletException ) {
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98 if( MinorServletException.isIn(throwable) ) {
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99 logger.info(ServletUtils.getCurrentURL(request), throwable);
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100 } else {
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101 logger.warn(ServletUtils.getCurrentURL(request), throwable);
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102 }
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103 } else {
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104 logger.error(ServletUtils.getCurrentURL(request), throwable);
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105 }
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106
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107 out.print( "\n<h1>Oops... An error has occurred</h1>\n\nPlease contact <a href=\"" );
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108 out.print( (Jtp.supportUrl()) );
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109 out.print( "\" target=\"_new\">Nabble Support</a> and explain what you did to cause this error.\nYour feedback is very important to us.\n\n" );
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110 if (hasTweaks) {
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111 out.print( "\n " );
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112 if (isAdmin) {
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113 out.print( "\n <div class=\"info-message rounded\" style=\"margin-top:1em;padding:.5em .3em\">\n <h3 style=\"margin-top:0;padding-top:0\">Modified NAML Code</h3>\n " );
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114 out.print( (site.getRootNode().getSubjectHtml()) );
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115 out.print( " has modified NAML code and this could be the cause of the error below.\n Please take a careful look at your changes and try to make sure your code is not broken.<br/>\n </div>\n " );
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116 }
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117 out.print( "\n <div style=\"margin:1.2em 0;font-weight:bold\">\n <img src=\"/images/tool.png\" width=\"16\" height=\"17\" style=\"vertical-align:-25%\"/>\n <a href=\"/template/NamlEditor.jtp\">Go to NAML Editor</a>\n </div>\n" );
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118 }
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119 out.print( "\n\n<h2 style=\"margin-top:1em\">More Details</h2>\n<div class=\"error-details light-bg-color\">\n <h3>Error " );
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120 out.print( (code) );
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121 out.print( "</h3>\n <pre>" );
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122 out.print( (HtmlUtils.htmlEncode(message)) );
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123 out.print( "</pre>\n " );
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124 if (throwable.getCause() != null) {
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125 String msg = throwable.getCause().getMessage();
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126 if( msg != null ) {
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127 int posBreak = msg.indexOf("\n\t");
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128 msg = posBreak > 0? msg.substring(0, posBreak) : msg;
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129 msg = HtmlUtils.htmlEncode(msg);
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130 msg = msg.replaceAll("\n", "<br/>").replaceAll("\t"," ");
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131
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132 out.print( "\n<p><b>Message</b>: " );
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133 out.print( (msg) );
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134 out.print( "</p>\n" );
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135
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136 }
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137 }
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138 out.print( "\n<p><b>RequestURI</b>: " );
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139 out.print( (uri) );
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140 out.print( "</p>\n<p><b>Server</b>: " );
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141 out.print( (Jtp.getDefaultHost()) );
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142 out.print( "</p>\n" );
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143
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144
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145 if (showStacks) {
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146 StringWriter sw = new StringWriter();
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147 PrintWriter pw = new PrintWriter(sw);
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148 throwable.printStackTrace(pw);
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149 pw.flush();
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150
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151 out.print( "<h3 style=\"margin-top:1.2em\">Caused by:</h3><pre>" );
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152 out.print( (HtmlUtils.htmlEncode(sw.toString())) );
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153 out.print( "</pre>" );
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154
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155 }
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156
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157 out.print( "\n</div>\n" );
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158
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159 } else {
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160
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161 out.print( "\n<h2 style=\"padding:0;margin:1em 0\">" );
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162 out.print( (message) );
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163 out.print( "</h2>\n\nPlease contact <a href=\"" );
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164 out.print( (Jtp.supportUrl()) );
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165 out.print( "\" target=\"_new\">Nabble Support</a> if you need help.\n" );
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166
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167 }
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168 {
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169 StringBuffer url = request.getRequestURL();
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170 String query = request.getQueryString();
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171 if( query != null )
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172 url.append( '?' ).append( query );
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173
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174 out.print( "\n<p>URL = <a href=\"" );
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175 out.print( (url) );
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176 out.print( "\">" );
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177 out.print( (url) );
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178 out.print( "</a></p>\n" );
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179
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180 }
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181
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182 out.print( "\n<table class=\"footer-table shaded-bg-color\">\n <tr>\n <td class=\"footer-left\">\n Powered by <a href=\"" );
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183 out.print( (Jtp.homePage()) );
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184 out.print( "\" target=\"_top\" title=\"Free forum and other embeddable web apps\">Nabble</a>\n </td>\n <td class=\"footer-right\"></td>\n </tr>\n</table>\n</div>\n</body>\n</html>\n" );
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185
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186 }
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187
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188 private void serviceUnavailablePage(Writer writer) {
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189 PrintWriter out = new PrintWriter(writer);
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190
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191 out.print( "\n<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n<html>\n <head>\n <title>Service Unavailable</title>\n <META NAME=\"robots\" CONTENT=\"noindex,nofollow\">\n </head>\n <body style=\"text-align:center;font-family: Verdana,sans-serif;font-size:.84em;padding-top:2em\">\n <img src=\"https://www.nabble.com/assets/images/logo_nabble_home.png\"/>\n <h1 style=\"margin-top:1.5em\">This Nabble server is over capacity.</h1>\n <div style=\"margin:0 15% 2em;text-align:center;background:#eee;padding:1em 0\">\n Too many requests... Please wait a moment and try again.\n </div>\n\n Powered by <a href=\"https://www.nabble.com/\">Nabble</a>\n </div>\n </body>\n</html>\n" );
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192
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193 }
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194
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195 private void databaseUpdatePage(Writer writer) {
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196 PrintWriter out = new PrintWriter(writer);
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197
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198 out.print( "\n<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">\n<html>\n <head>\n <title>Updating Database</title>\n <META NAME=\"robots\" CONTENT=\"noindex,nofollow\">\n </head>\n <body style=\"text-align:center;font-family: Verdana,sans-serif;font-size:.84em;padding-top:2em\">\n <h1 style=\"margin-top:3em\">Updating Database</h1>\n <div style=\"margin:0 25% 2em;text-align:center;background:#eee;padding:1em 0\">\n This database is being updated. Please try again in a few seconds.\n </div>\n <h2>Reloading in <span id=\"sec\">60</span> seconds</h2>\n <script type=\"text/javascript\">\n var seconds = 60;\n function countDown() {\n if (seconds == 0) {\n window.location.reload();\n return;\n }\n document.getElementById('sec').innerHTML = seconds;\n seconds--;\n setTimeout(countDown, 1000);\n };\n countDown();\n </script>\n\n Powered by <a href=\"https://www.nabble.com/\">Nabble</a>\n </div>\n </body>\n</html>\n" );
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199
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200 }
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201 }
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202
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