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annotate web/src/luan/modules/web/HttpLuan.java @ 222:b76fcb72d97d

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add AbstractLuanTable and improve HttpLuan git-svn-id: https://luan-java.googlecode.com/svn/trunk@223 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Mon, 21 Jul 2014 02:23:05 +0000
parents ec016471c6eb
children a9fe265dbac3
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diff changeset
1 package luan.modules.web;
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2
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3 import java.io.PrintWriter;
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4 import java.io.IOException;
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5 import java.util.Map;
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6 import java.util.AbstractMap;
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7 import java.util.Set;
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8 import java.util.Arrays;
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9 import java.util.Iterator;
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10 import java.util.Enumeration;
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11 import javax.servlet.ServletOutputStream;
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12 import javax.servlet.http.Cookie;
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13 import javax.servlet.http.HttpServletRequest;
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14 import javax.servlet.http.HttpServletResponse;
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15 import javax.servlet.http.HttpSession;
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16 import luan.Luan;
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17 import luan.LuanState;
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18 import luan.LuanFunction;
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19 import luan.LuanElement;
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20 import luan.LuanException;
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21 import luan.LuanTable;
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22 import luan.AbstractLuanTable;
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23 import luan.LuanJavaFunction;
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24 import luan.LuanExitException;
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25 import luan.DeepCloner;
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26 import luan.modules.PackageLuan;
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27 import luan.modules.IoLuan;
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28 import luan.modules.TableLuan;
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29
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31 public final class HttpLuan {
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32
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33 public static final LuanFunction LOADER = new LuanFunction() {
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34 @Override public Object call(LuanState luan,Object[] args) {
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35 LuanTable module = Luan.newTable();
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36 try {
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37 addStatic( module, "new_luan_handler", LuanState.class );
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38 } catch(NoSuchMethodException e) {
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39 throw new RuntimeException(e);
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40 }
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41 return module;
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42 }
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43 };
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44
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45 private static void addStatic(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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46 t.put( method, new LuanJavaFunction(HttpLuan.class.getMethod(method,parameterTypes),null) );
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47 }
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49 public static LuanHandler new_luan_handler(LuanState luan) {
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50 return new LuanHandler(luan);
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51 }
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53 public static boolean service(LuanState luan,HttpServletRequest request,HttpServletResponse response,String modName)
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54 throws LuanException
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55 {
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56 LuanFunction fn;
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57 synchronized(luan) {
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58 Object mod = PackageLuan.load(luan,modName);
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59 if( mod==null )
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60 return false;
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61 if( !(mod instanceof LuanTable) )
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62 throw luan.exception( "module '"+modName+"' must return a table" );
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63 LuanTable tbl = (LuanTable)mod;
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64 if( Luan.toBoolean( tbl.get("per_session") ) ) {
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65 HttpSession session = request.getSession();
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66 LuanState sessionLuan = (LuanState)session.getValue("luan");
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67 if( sessionLuan!=null ) {
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68 luan = sessionLuan;
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69 } else {
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70 DeepCloner cloner = new DeepCloner();
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71 luan = cloner.deepClone(luan);
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72 session.putValue("luan",luan);
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73 }
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74 tbl = (LuanTable)PackageLuan.require(luan,modName);
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75 fn = (LuanFunction)tbl.get("service");
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76 } else {
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77 fn = (LuanFunction)tbl.get("service");
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78 if( fn == null )
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79 throw luan.exception( "function 'service' is not defined" );
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80 DeepCloner cloner = new DeepCloner();
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81 luan = cloner.deepClone(luan);
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82 fn = cloner.get(fn);
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83 }
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84 }
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85
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86 LuanTable module = (LuanTable)PackageLuan.loaded(luan).get("web/Http");
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87 if( module == null )
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88 throw luan.exception( "module 'web/Http' not defined" );
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89 HttpLuan lib = new HttpLuan(request,response);
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90 try {
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91 module.put( "request", lib.requestTable() );
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92 module.put( "response", lib.responseTable() );
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93 module.put( "cookie", lib.cookieTable() );
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94 module.put( "session", lib.sessionTable() );
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95 /*
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96 module.put( "write", new LuanJavaFunction(
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97 HttpLuan.class.getMethod( "text_write", LuanState.class, new Object[0].getClass() ), lib
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98 ) );
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99 */
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100 } catch(NoSuchMethodException e) {
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101 throw new RuntimeException(e);
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102 }
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103
138
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104 luan.call(fn,"<http>");
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105 return true;
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106 }
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107
136
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108
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109
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110 private final HttpServletRequest request;
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111 private final HttpServletResponse response;
138
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112 // private PrintWriter writer = null;
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113 // private ServletOutputStream sos = null;
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114
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115 private HttpLuan(HttpServletRequest request,HttpServletResponse response) {
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116 this.request = request;
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117 this.response = response;
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118 }
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119
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120 private LuanTable requestTable() throws NoSuchMethodException {
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121 LuanTable tbl = Luan.newTable();
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122 tbl.put("java",request);
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123 LuanTable parameters = new NameTable() {
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124
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125 @Override Object get(String name) {
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126 return request.getParameter(name);
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127 }
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128
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129 @Override Iterator<String> names() {
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130 return new EnumerationIterator(request.getParameterNames());
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131 }
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132
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133 @Override protected String type() {
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134 return "request.parameters-table";
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135 }
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136 };
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137 tbl.put( "parameters", parameters );
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138 add( tbl, "get_parameter_values", String.class );
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139 LuanTable headers = new NameTable() {
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140
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141 @Override Object get(String name) {
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142 return request.getHeader(name);
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143 }
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144
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145 @Override Iterator<String> names() {
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146 return new EnumerationIterator(request.getHeaderNames());
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147 }
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148
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149 @Override protected String type() {
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150 return "request.headers-table";
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151 }
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152 };
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153 tbl.put( "headers", headers );
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154 tbl.put( "get_method", new LuanJavaFunction(
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155 HttpServletRequest.class.getMethod("getMethod"), request
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156 ) );
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157 tbl.put( "get_servlet_path", new LuanJavaFunction(
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158 HttpServletRequest.class.getMethod("getServletPath"), request
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159 ) );
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160 tbl.put( "get_server_name", new LuanJavaFunction(
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161 HttpServletRequest.class.getMethod("getServerName"), request
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162 ) );
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163 add( tbl, "get_current_url" );
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164 tbl.put( "get_remote_address", new LuanJavaFunction(
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165 HttpServletRequest.class.getMethod("getRemoteAddr"), request
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166 ) );
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167 return tbl;
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168 }
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169
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170 private LuanTable responseTable() throws NoSuchMethodException {
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171 LuanTable tbl = Luan.newTable();
217
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172 tbl.put("java",response);
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173 add( tbl, "send_redirect", String.class );
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174 add( tbl, "send_error", Integer.TYPE, String.class );
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175 tbl.put( "contains_header", new LuanJavaFunction(
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176 HttpServletResponse.class.getMethod("containsHeader",String.class), response
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177 ) );
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178 tbl.put( "set_header", new LuanJavaFunction(
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179 HttpServletResponse.class.getMethod("setHeader",String.class,String.class), response
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180 ) );
222
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181 /*
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182 LuanTable headers = new NameTable() {
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183
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184 @Override Object get(String name) {
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185 return response.getHeader(name);
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186 }
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187
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188 @Override Iterator<String> names() {
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189 return response.getHeaderNames().iterator();
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190 }
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191
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192 @Override protected String type() {
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193 return "response.headers-table";
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194 }
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195 };
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196 tbl.put( "headers", headers );
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197 */
217
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198 tbl.put( "set_content_type", new LuanJavaFunction(
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199 HttpServletResponse.class.getMethod("setContentType",String.class), response
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200 ) );
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201 tbl.put( "set_character_encoding", new LuanJavaFunction(
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202 HttpServletResponse.class.getMethod("setCharacterEncoding",String.class), response
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203 ) );
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204 add( tbl, "text_writer" );
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205 return tbl;
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206 }
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207
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208 private LuanTable cookieTable() throws NoSuchMethodException {
221
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209 LuanTable tbl = Luan.newTable();
217
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210 tbl.put( "get", new LuanJavaFunction(
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211 HttpLuan.class.getMethod("get_cookie",String.class), this
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212 ) );
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213 tbl.put( "set", new LuanJavaFunction(
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214 HttpLuan.class.getMethod("set_cookie", String.class, String.class, Boolean.TYPE, String.class), this
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215 ) );
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216 tbl.put( "remove", new LuanJavaFunction(
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217 HttpLuan.class.getMethod("remove_cookie", String.class, String.class), this
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218 ) );
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219 return tbl;
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220 }
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221
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222 private LuanTable sessionTable() throws NoSuchMethodException {
221
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223 LuanTable tbl = Luan.newTable();
222
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224 LuanTable attributes = new NameTable() {
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225
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226 @Override Object get(String name) {
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227 return request.getSession().getAttribute(name);
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228 }
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229
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230 @Override Iterator<String> names() {
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231 return new EnumerationIterator(request.getSession().getAttributeNames());
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232 }
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233
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234 @Override public Object put(Object key,Object val) {
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235 if( !(key instanceof String) )
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236 throw new IllegalArgumentException("key must be string for session attributes table");
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237 String name = (String)key;
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238 request.getSession().setAttribute(name,val);
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239 return null;
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240 }
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241
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242 @Override protected String type() {
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243 return "session.attributes-table";
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244 }
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245 };
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246 tbl.put( "attributes", attributes );
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247 return tbl;
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248 }
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249
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250 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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251 t.put( method, new LuanJavaFunction(HttpLuan.class.getMethod(method,parameterTypes),this) );
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252 }
138
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253 /*
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254 public void text_write(LuanState luan,Object... args) throws LuanException, IOException {
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255 if( writer == null )
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256 writer = response.getWriter();
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257 for( Object obj : args ) {
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258 writer.print( luan.toString(obj) );
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259 }
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260 }
138
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261 */
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262 public LuanTable text_writer() throws IOException {
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263 return IoLuan.textWriter(response.getWriter());
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264 }
136
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265
222
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266 public LuanTable get_parameter_values(String name) {
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267 Object[] a = request.getParameterValues(name);
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268 return a==null ? null : TableLuan.pack(a);
217
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269 }
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270
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271 public String get_cookie(String name) {
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272 return getCookieValue(request, name);
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273 }
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274
217
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275 public String get_current_url() {
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276 return getCurrentURL(request);
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277 }
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278
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279 public void send_redirect(String redirectUrl)
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280 throws IOException
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281 {
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282 response.sendRedirect(redirectUrl);
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283 throw new LuanExitException();
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284 }
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285
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286 public void send_error(int code,String text)
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287 throws IOException
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288 {
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289 response.sendError(code, text);
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290 throw new LuanExitException();
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291 }
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292
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293 public void set_cookie(String name,String value,boolean isPersistent, String domain) {
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294 setCookie(request,response,name,value,isPersistent,domain);
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295 }
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296
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297 public void remove_cookie(String name, String domain) {
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298 removeCookie(request,response,name,domain);
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299 }
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300
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301
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302 // static utils
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303
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304 public static String getQueryString(HttpServletRequest request) {
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305 return getQueryString(request,0);
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306 }
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307
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308 public static String getQueryString(HttpServletRequest request,int maxValueLen) {
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309 String method = request.getMethod();
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310 if( method.equals("GET") )
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311 return request.getQueryString();
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312 if( !method.equals("POST") && !method.equals("HEAD") )
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313 throw new RuntimeException(method);
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314 Enumeration en = request.getParameterNames();
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315 StringBuilder queryBuf = new StringBuilder();
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316 if( !en.hasMoreElements() )
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317 return null;
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318 do {
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319 String param = (String)en.nextElement();
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320 String value = request.getParameter(param);
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321 if( maxValueLen > 0 ) {
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322 int len = value.length();
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323 if( len > maxValueLen )
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324 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen);
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325 }
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326 queryBuf.append(param);
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327 queryBuf.append('=');
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328 queryBuf.append(value);
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329 queryBuf.append('&');
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330 } while( en.hasMoreElements() );
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331 queryBuf.deleteCharAt(queryBuf.length() - 1);
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332 return queryBuf.toString();
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333 }
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334
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335 public static String getCurrentURL(HttpServletRequest request) {
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336 return getCurrentURL(request,0);
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337 }
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338
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339 public static String getCurrentURL(HttpServletRequest request,int maxValueLen) {
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340 // StringBuffer buf = HttpUtils.getRequestURL(request);
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341 StringBuffer buf = request.getRequestURL();
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342 String qStr = getQueryString(request,maxValueLen);
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343 if(qStr != null && qStr.length() > 0) {
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344 buf.append('?');
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345 buf.append(qStr);
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346 }
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347 return buf.toString();
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348 }
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349
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350 private static String escape(String value) {
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351 return value.replaceAll(";", "%3B");
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352 }
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353
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354 private static String unescape(String value) {
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355 return value.replaceAll("%3B", ";");
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356 }
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357
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358 private static Cookie getCookie(HttpServletRequest request,String name) {
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359 Cookie[] cookies = request.getCookies();
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360 if( cookies == null )
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361 return null;
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362 for (Cookie cookie : cookies) {
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363 if (cookie.getName().equals(name))
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364 return cookie;
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365 }
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366 return null;
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367 }
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368
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369 public static String getCookieValue(HttpServletRequest request,String name) {
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370 Cookie cookie = getCookie(request,name);
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371 return cookie==null ? null : unescape(cookie.getValue());
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372 }
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373
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374 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) {
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375 Cookie cookie = getCookie(request,name);
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376 if( cookie==null || !cookie.getValue().equals(value) ) {
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377 cookie = new Cookie(name, escape(value));
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378 cookie.setPath("/");
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379 if (domain != null && domain.length() > 0)
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380 cookie.setDomain(domain);
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381 if( isPersistent )
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382 cookie.setMaxAge(10000000);
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383 response.addCookie(cookie);
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384 }
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385 }
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386
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387 public static void removeCookie(HttpServletRequest request,
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388 HttpServletResponse response,
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389 String name,
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390 String domain
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391
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392 ) {
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393 Cookie cookie = getCookie(request, name);
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394 if(cookie != null) {
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395 Cookie delCookie = new Cookie(name, "delete");
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396 delCookie.setPath("/");
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397 delCookie.setMaxAge(0);
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398 if (domain != null && domain.length() > 0)
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399 delCookie.setDomain(domain);
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400 response.addCookie(delCookie);
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401 }
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402 }
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403
222
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404
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406 // util classes
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408 static final class EnumerationIterator<E> implements Iterator<E> {
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409 private final Enumeration<E> en;
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410
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411 EnumerationIterator(Enumeration<E> en) {
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412 this.en = en;
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413 }
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414
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415 @Override public boolean hasNext() {
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416 return en.hasMoreElements();
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417 }
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418
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419 @Override public E next() {
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420 return en.nextElement();
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421 }
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422
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423 @Override public void remove() {
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424 throw new UnsupportedOperationException();
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425 }
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426 }
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427
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428 private static abstract class NameTable extends AbstractLuanTable {
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429 abstract Object get(String name);
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430 abstract Iterator<String> names();
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431
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432 @Override public final Object get(Object key) {
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433 if( !(key instanceof String) )
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434 return null;
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435 String name = (String)key;
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436 return get(name);
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437 }
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438
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439 @Override public final Iterator<Map.Entry<Object,Object>> iterator() {
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440 return new Iterator<Map.Entry<Object,Object>>() {
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441 Iterator<String> names = names();
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442
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443 @Override public boolean hasNext() {
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444 return names.hasNext();
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445 }
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446 @Override public Map.Entry<Object,Object> next() {
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447 String name = names.next();
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448 Object val = get(name);
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449 return new AbstractMap.SimpleEntry<Object,Object>(name,val);
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450 }
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451 @Override public void remove() {
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452 throw new UnsupportedOperationException();
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453 }
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454 };
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455 }
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456 };
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457
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458
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459 }