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annotate web/src/luan/modules/web/HttpLuan.java @ 225:7c768f63bbb3

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better cookie API git-svn-id: https://luan-java.googlecode.com/svn/trunk@226 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 22 Jul 2014 03:06:27 +0000
parents 05eb2837ddbf
children 392105b660d7
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rev   line source
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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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30
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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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48
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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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52
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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( "session", lib.sessionTable() );
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94 /*
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95 module.put( "write", new LuanJavaFunction(
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96 HttpLuan.class.getMethod( "text_write", LuanState.class, new Object[0].getClass() ), lib
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97 ) );
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98 */
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99 } catch(NoSuchMethodException e) {
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100 throw new RuntimeException(e);
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101 }
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102
138
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103 luan.call(fn,"<http>");
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104 return true;
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105 }
89
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106
136
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107
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108
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109 private final HttpServletRequest request;
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110 private final HttpServletResponse response;
138
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111 // private PrintWriter writer = null;
136
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112 // private ServletOutputStream sos = null;
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113
168
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114 private HttpLuan(HttpServletRequest request,HttpServletResponse response) {
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115 this.request = request;
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116 this.response = response;
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117 }
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118
136
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119 private LuanTable requestTable() throws NoSuchMethodException {
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120 LuanTable tbl = Luan.newTable();
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121 tbl.put("java",request);
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122 LuanTable parameters = new NameTable() {
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123
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124 @Override Object get(String name) {
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125 return request.getParameter(name);
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126 }
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127
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128 @Override Iterator<String> names() {
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129 return new EnumerationIterator(request.getParameterNames());
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130 }
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131
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132 @Override protected String type() {
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133 return "request.parameters-table";
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134 }
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135 };
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136 tbl.put( "parameters", parameters );
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137 add( tbl, "get_parameter_values", String.class );
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138 LuanTable headers = new NameTable() {
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139
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140 @Override Object get(String name) {
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141 return request.getHeader(name);
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142 }
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143
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144 @Override Iterator<String> names() {
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145 return new EnumerationIterator(request.getHeaderNames());
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146 }
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147
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148 @Override protected String type() {
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149 return "request.headers-table";
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150 }
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151 };
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152 tbl.put( "headers", headers );
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153 tbl.put( "get_method", new LuanJavaFunction(
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154 HttpServletRequest.class.getMethod("getMethod"), request
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155 ) );
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156 tbl.put( "get_servlet_path", new LuanJavaFunction(
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157 HttpServletRequest.class.getMethod("getServletPath"), request
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158 ) );
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159 tbl.put( "get_server_name", new LuanJavaFunction(
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160 HttpServletRequest.class.getMethod("getServerName"), request
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161 ) );
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162 add( tbl, "get_current_url" );
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163 tbl.put( "get_remote_address", new LuanJavaFunction(
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164 HttpServletRequest.class.getMethod("getRemoteAddr"), request
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165 ) );
225
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166 LuanTable cookies = new AbstractLuanTable() {
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167
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168 @Override public final Object get(Object key) {
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169 if( !(key instanceof String) )
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170 return null;
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171 String name = (String)key;
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172 return getCookieValue(request,name);
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173 }
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174
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175 @Override public final Iterator<Map.Entry<Object,Object>> iterator() {
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176 return new Iterator<Map.Entry<Object,Object>>() {
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177 final Cookie[] cookies = request.getCookies();
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178 int i = 0;
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179
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180 @Override public boolean hasNext() {
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181 return i < cookies.length;
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182 }
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183 @Override public Map.Entry<Object,Object> next() {
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184 Cookie cookie = cookies[i++];
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185 String name = cookie.getName();
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186 Object val = unescape(cookie.getValue());
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187 return new AbstractMap.SimpleEntry<Object,Object>(name,val);
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188 }
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189 @Override public void remove() {
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190 throw new UnsupportedOperationException();
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191 }
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192 };
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193 }
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194
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195 @Override protected String type() {
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196 return "request.cookies-table";
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197 }
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198 };
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199 tbl.put( "cookies", cookies );
217
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200 return tbl;
136
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201 }
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202
136
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203 private LuanTable responseTable() throws NoSuchMethodException {
221
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204 LuanTable tbl = Luan.newTable();
217
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205 tbl.put("java",response);
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206 add( tbl, "send_redirect", String.class );
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207 add( tbl, "send_error", Integer.TYPE, String.class );
222
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208 LuanTable headers = new NameTable() {
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209
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210 @Override Object get(String name) {
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211 return response.getHeader(name);
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212 }
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213
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214 @Override Iterator<String> names() {
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215 return response.getHeaderNames().iterator();
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216 }
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217
224
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218 @Override public void put(Object key,Object val) {
223
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219 if( !(key instanceof String) )
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220 throw new IllegalArgumentException("key must be string for headers table");
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221 String name = (String)key;
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222 if( val instanceof String ) {
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223 response.setHeader(name,(String)val);
224
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224 return;
223
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225 }
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226 Integer i = Luan.asInteger(val);
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227 if( i != null ) {
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228 response.setIntHeader(name,i);
224
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229 return;
223
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230 }
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231 throw new IllegalArgumentException("value must be string or integer for headers table");
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232 }
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233
222
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234 @Override protected String type() {
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235 return "response.headers-table";
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236 }
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237 };
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238 tbl.put( "headers", headers );
217
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239 tbl.put( "set_content_type", new LuanJavaFunction(
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240 HttpServletResponse.class.getMethod("setContentType",String.class), response
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241 ) );
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242 tbl.put( "set_character_encoding", new LuanJavaFunction(
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243 HttpServletResponse.class.getMethod("setCharacterEncoding",String.class), response
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244 ) );
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245 add( tbl, "text_writer" );
225
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246 add( tbl, "set_cookie", String.class, String.class, Boolean.TYPE, String.class );
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247 add( tbl, "remove_cookie", String.class, String.class );
217
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248 return tbl;
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249 }
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250
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251 private LuanTable sessionTable() throws NoSuchMethodException {
221
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252 LuanTable tbl = Luan.newTable();
222
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253 LuanTable attributes = new NameTable() {
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254
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255 @Override Object get(String name) {
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256 return request.getSession().getAttribute(name);
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257 }
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258
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259 @Override Iterator<String> names() {
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260 return new EnumerationIterator(request.getSession().getAttributeNames());
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261 }
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262
224
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263 @Override public void put(Object key,Object val) {
222
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264 if( !(key instanceof String) )
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265 throw new IllegalArgumentException("key must be string for session attributes table");
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266 String name = (String)key;
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267 request.getSession().setAttribute(name,val);
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268 }
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269
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270 @Override protected String type() {
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271 return "session.attributes-table";
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272 }
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273 };
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274 tbl.put( "attributes", attributes );
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275 return tbl;
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276 }
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277
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278 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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279 t.put( method, new LuanJavaFunction(HttpLuan.class.getMethod(method,parameterTypes),this) );
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280 }
138
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281 /*
136
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282 public void text_write(LuanState luan,Object... args) throws LuanException, IOException {
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283 if( writer == null )
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284 writer = response.getWriter();
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285 for( Object obj : args ) {
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286 writer.print( luan.toString(obj) );
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287 }
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288 }
138
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289 */
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290 public LuanTable text_writer() throws IOException {
168
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291 return IoLuan.textWriter(response.getWriter());
138
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292 }
136
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293
222
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294 public LuanTable get_parameter_values(String name) {
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295 Object[] a = request.getParameterValues(name);
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296 return a==null ? null : TableLuan.pack(a);
217
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297 }
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298
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299 public String get_current_url() {
89
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300 return getCurrentURL(request);
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301 }
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302
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303 public void send_redirect(String redirectUrl)
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304 throws IOException
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305 {
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306 response.sendRedirect(redirectUrl);
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307 throw new LuanExitException();
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308 }
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309
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310 public void send_error(int code,String text)
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311 throws IOException
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312 {
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313 response.sendError(code, text);
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314 throw new LuanExitException();
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315 }
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316
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317 public void set_cookie(String name,String value,boolean isPersistent, String domain) {
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318 setCookie(request,response,name,value,isPersistent,domain);
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319 }
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320
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321 public void remove_cookie(String name, String domain) {
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322 removeCookie(request,response,name,domain);
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323 }
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324
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325
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326 // static utils
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327
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328 public static String getQueryString(HttpServletRequest request) {
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329 return getQueryString(request,0);
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330 }
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331
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332 public static String getQueryString(HttpServletRequest request,int maxValueLen) {
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333 String method = request.getMethod();
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334 if( method.equals("GET") )
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335 return request.getQueryString();
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336 if( !method.equals("POST") && !method.equals("HEAD") )
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337 throw new RuntimeException(method);
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338 Enumeration en = request.getParameterNames();
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339 StringBuilder queryBuf = new StringBuilder();
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340 if( !en.hasMoreElements() )
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341 return null;
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342 do {
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343 String param = (String)en.nextElement();
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344 String value = request.getParameter(param);
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345 if( maxValueLen > 0 ) {
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346 int len = value.length();
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347 if( len > maxValueLen )
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348 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen);
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349 }
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350 queryBuf.append(param);
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351 queryBuf.append('=');
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352 queryBuf.append(value);
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353 queryBuf.append('&');
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354 } while( en.hasMoreElements() );
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355 queryBuf.deleteCharAt(queryBuf.length() - 1);
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356 return queryBuf.toString();
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357 }
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358
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359 public static String getCurrentURL(HttpServletRequest request) {
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360 return getCurrentURL(request,0);
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361 }
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362
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363 public static String getCurrentURL(HttpServletRequest request,int maxValueLen) {
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364 // StringBuffer buf = HttpUtils.getRequestURL(request);
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365 StringBuffer buf = request.getRequestURL();
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366 String qStr = getQueryString(request,maxValueLen);
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367 if(qStr != null && qStr.length() > 0) {
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368 buf.append('?');
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369 buf.append(qStr);
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370 }
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371 return buf.toString();
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372 }
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373
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374 private static String escape(String value) {
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375 return value.replaceAll(";", "%3B");
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376 }
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377
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378 private static String unescape(String value) {
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379 return value.replaceAll("%3B", ";");
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380 }
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381
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382 private static Cookie getCookie(HttpServletRequest request,String name) {
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383 Cookie[] cookies = request.getCookies();
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384 if( cookies == null )
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385 return null;
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386 for (Cookie cookie : cookies) {
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387 if (cookie.getName().equals(name))
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388 return cookie;
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389 }
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390 return null;
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391 }
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392
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393 public static String getCookieValue(HttpServletRequest request,String name) {
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394 Cookie cookie = getCookie(request,name);
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395 return cookie==null ? null : unescape(cookie.getValue());
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396 }
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397
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398 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) {
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399 Cookie cookie = getCookie(request,name);
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400 if( cookie==null || !cookie.getValue().equals(value) ) {
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401 cookie = new Cookie(name, escape(value));
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402 cookie.setPath("/");
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403 if (domain != null && domain.length() > 0)
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404 cookie.setDomain(domain);
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405 if( isPersistent )
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406 cookie.setMaxAge(10000000);
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407 response.addCookie(cookie);
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408 }
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409 }
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410
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411 public static void removeCookie(HttpServletRequest request,
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412 HttpServletResponse response,
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413 String name,
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414 String domain
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415 ) {
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416 Cookie cookie = getCookie(request, name);
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417 if(cookie != null) {
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418 Cookie delCookie = new Cookie(name, "delete");
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419 delCookie.setPath("/");
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420 delCookie.setMaxAge(0);
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421 if (domain != null && domain.length() > 0)
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422 delCookie.setDomain(domain);
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423 response.addCookie(delCookie);
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424 }
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425 }
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426
222
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427
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428
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429 // util classes
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430
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431 static final class EnumerationIterator<E> implements Iterator<E> {
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432 private final Enumeration<E> en;
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433
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434 EnumerationIterator(Enumeration<E> en) {
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435 this.en = en;
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436 }
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437
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438 @Override public boolean hasNext() {
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439 return en.hasMoreElements();
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440 }
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441
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442 @Override public E next() {
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443 return en.nextElement();
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444 }
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445
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446 @Override public void remove() {
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447 throw new UnsupportedOperationException();
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448 }
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449 }
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450
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451 private static abstract class NameTable extends AbstractLuanTable {
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452 abstract Object get(String name);
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453 abstract Iterator<String> names();
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454
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455 @Override public final Object get(Object key) {
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456 if( !(key instanceof String) )
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457 return null;
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458 String name = (String)key;
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459 return get(name);
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460 }
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461
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462 @Override public final Iterator<Map.Entry<Object,Object>> iterator() {
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463 return new Iterator<Map.Entry<Object,Object>>() {
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464 Iterator<String> names = names();
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465
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466 @Override public boolean hasNext() {
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467 return names.hasNext();
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468 }
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469 @Override public Map.Entry<Object,Object> next() {
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470 String name = names.next();
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471 Object val = get(name);
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472 return new AbstractMap.SimpleEntry<Object,Object>(name,val);
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473 }
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474 @Override public void remove() {
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475 throw new UnsupportedOperationException();
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476 }
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477 };
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478 }
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479 };
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480
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481
76
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482 }