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annotate web/src/luan/modules/web/HttpServicer.java @ 283:b669cdaf54b7

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add URL post; add Http.request.query_string; add web_run.form(); git-svn-id: https://luan-java.googlecode.com/svn/trunk@284 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 02 Dec 2014 03:34:04 +0000
parents 9e0d4452e649
children 1f6d828986b9
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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.LuanProperty;
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26 import luan.DeepCloner;
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27 import luan.modules.PackageLuan;
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28 import luan.modules.IoLuan;
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29 import luan.modules.TableLuan;
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30
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31
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32 public final class HttpServicer {
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33
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34 public static boolean service(LuanState luan,HttpServletRequest request,HttpServletResponse response,String modName)
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35 throws LuanException
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36 {
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37 LuanFunction fn;
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38 synchronized(luan) {
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39 Object mod = PackageLuan.load(luan,modName);
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40 if( mod==null )
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41 return false;
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42 if( !(mod instanceof LuanTable) )
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43 throw luan.exception( "module '"+modName+"' must return a table" );
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44 LuanTable tbl = (LuanTable)mod;
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45 if( Luan.toBoolean( tbl.get("per_session") ) ) {
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46 HttpSession session = request.getSession();
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47 LuanState sessionLuan = (LuanState)session.getValue("luan");
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48 if( sessionLuan!=null ) {
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49 luan = sessionLuan;
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50 } else {
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51 DeepCloner cloner = new DeepCloner();
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52 luan = cloner.deepClone(luan);
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53 session.putValue("luan",luan);
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54 }
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55 tbl = (LuanTable)PackageLuan.require(luan,modName);
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56 fn = (LuanFunction)tbl.get("service");
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57 } else {
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58 fn = (LuanFunction)tbl.get("service");
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59 if( fn == null )
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60 throw luan.exception( "function 'service' is not defined" );
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61 DeepCloner cloner = new DeepCloner();
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62 luan = cloner.deepClone(luan);
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63 fn = cloner.get(fn);
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64 }
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65 }
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66
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67 LuanTable module = (LuanTable)PackageLuan.loaded(luan).get("luan:web/Http");
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68 if( module == null )
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69 throw luan.exception( "module 'web/Http' not defined" );
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70 HttpServicer lib = new HttpServicer(request,response);
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71 try {
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72 module.put( "request", lib.requestTable() );
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73 module.put( "response", lib.responseTable() );
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74 module.put( "session", lib.sessionTable() );
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75 /*
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76 module.put( "write", new LuanJavaFunction(
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77 HttpServicer.class.getMethod( "text_write", LuanState.class, new Object[0].getClass() ), lib
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78 ) );
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79 */
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80 } catch(NoSuchMethodException e) {
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81 throw new RuntimeException(e);
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82 }
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83
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84 try {
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85 luan.call(fn,"<http>");
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86 } catch(LuanExitException e) {
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87 // System.out.println("caught LuanExitException");
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88 }
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89 return true;
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90 }
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94 private final HttpServletRequest request;
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95 private final HttpServletResponse response;
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96 // private PrintWriter writer = null;
136
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97 // private ServletOutputStream sos = null;
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98
251
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99 private HttpServicer(HttpServletRequest request,HttpServletResponse response) {
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100 this.request = request;
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101 this.response = response;
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102 }
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103
136
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104 private LuanTable requestTable() throws NoSuchMethodException {
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105 LuanTable tbl = Luan.newPropertyTable();
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106 tbl.put("java",request);
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107 LuanTable parameters = new NameTable() {
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108
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109 @Override Object get(String name) {
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110 return request.getParameter(name);
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111 }
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112
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113 @Override Iterator<String> names() {
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114 return new EnumerationIterator(request.getParameterNames());
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115 }
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116
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117 @Override protected String type() {
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118 return "request.parameters-table";
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119 }
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120 };
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121 tbl.put( "parameters", parameters );
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122 add( tbl, "get_parameter_values", String.class );
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123 LuanTable headers = new NameTable() {
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124
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125 @Override Object get(String name) {
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126 return request.getHeader(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.getHeaderNames());
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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.headers-table";
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135 }
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136 };
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137 tbl.put( "headers", headers );
227
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138 tbl.put( "method", new LuanProperty() { public Object get() {
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139 return request.getMethod();
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140 } } );
227
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141 tbl.put( "servlet_path", new LuanProperty() { public Object get() {
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142 return request.getServletPath();
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143 } } );
227
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144 tbl.put( "server_name", new LuanProperty() { public Object get() {
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145 return request.getServerName();
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146 } } );
227
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147 tbl.put( "current_url", new LuanProperty() { public Object get() {
226
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148 return getCurrentURL(request);
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149 } } );
283
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150 tbl.put( "query_string", new LuanProperty() { public Object get() {
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151 return getQueryString(request);
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152 } } );
227
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153 tbl.put( "remote_address", new LuanProperty() { public Object get() {
226
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154 return request.getRemoteAddr();
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155 } } );
225
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156 LuanTable cookies = new AbstractLuanTable() {
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157
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158 @Override public final Object get(Object key) {
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159 if( !(key instanceof String) )
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160 return null;
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161 String name = (String)key;
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162 return getCookieValue(request,name);
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163 }
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164
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165 @Override public final Iterator<Map.Entry<Object,Object>> iterator() {
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166 return new Iterator<Map.Entry<Object,Object>>() {
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167 final Cookie[] cookies = request.getCookies();
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168 int i = 0;
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169
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170 @Override public boolean hasNext() {
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171 return i < cookies.length;
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172 }
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173 @Override public Map.Entry<Object,Object> next() {
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174 Cookie cookie = cookies[i++];
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175 String name = cookie.getName();
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176 Object val = unescape(cookie.getValue());
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177 return new AbstractMap.SimpleEntry<Object,Object>(name,val);
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178 }
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179 @Override public void remove() {
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180 throw new UnsupportedOperationException();
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181 }
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182 };
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183 }
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184
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185 @Override protected String type() {
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186 return "request.cookies-table";
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187 }
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188 };
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189 tbl.put( "cookies", cookies );
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190 return tbl;
136
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191 }
89
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192
136
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193 private LuanTable responseTable() throws NoSuchMethodException {
226
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194 LuanTable tbl = Luan.newPropertyTable();
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195 tbl.put("java",response);
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196 add( tbl, "send_redirect", String.class );
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197 add( tbl, "send_error", Integer.TYPE, String.class );
222
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198 LuanTable headers = new NameTable() {
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199
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200 @Override Object get(String name) {
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201 return response.getHeader(name);
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202 }
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203
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204 @Override Iterator<String> names() {
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205 return response.getHeaderNames().iterator();
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206 }
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207
224
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208 @Override public void put(Object key,Object val) {
223
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209 if( !(key instanceof String) )
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210 throw new IllegalArgumentException("key must be string for headers table");
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211 String name = (String)key;
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212 if( val instanceof String ) {
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213 response.setHeader(name,(String)val);
224
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214 return;
223
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215 }
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216 Integer i = Luan.asInteger(val);
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217 if( i != null ) {
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218 response.setIntHeader(name,i);
224
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219 return;
223
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220 }
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221 throw new IllegalArgumentException("value must be string or integer for headers table");
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222 }
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223
222
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224 @Override protected String type() {
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225 return "response.headers-table";
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226 }
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227 };
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228 tbl.put( "headers", headers );
227
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229 tbl.put( "content_type", new LuanProperty() {
226
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230 @Override public Object get() {
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231 return response.getContentType();
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232 }
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233 @Override public boolean set(Object value) {
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234 response.setContentType(string(value)); return true;
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235 }
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236 } );
227
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237 tbl.put( "character_encoding", new LuanProperty() {
226
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238 @Override public Object get() {
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239 return response.getCharacterEncoding();
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240 }
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241 @Override public boolean set(Object value) {
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242 response.setCharacterEncoding(string(value)); return true;
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243 }
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244 } );
217
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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 );
217
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275 return tbl;
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276 }
89
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277
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278 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
251
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279 t.put( method, new LuanJavaFunction(HttpServicer.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 {
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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);
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297 }
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298
89
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299 public void send_redirect(String redirectUrl)
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300 throws IOException
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301 {
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302 response.sendRedirect(redirectUrl);
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303 throw new LuanExitException();
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304 }
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305
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306 public void send_error(int code,String text)
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307 throws IOException
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308 {
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309 response.sendError(code, text);
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310 throw new LuanExitException();
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311 }
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312
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313 public void set_cookie(String name,String value,boolean isPersistent, String domain) {
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314 setCookie(request,response,name,value,isPersistent,domain);
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315 }
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316
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317 public void remove_cookie(String name, String domain) {
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318 removeCookie(request,response,name,domain);
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319 }
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320
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321
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322 // static utils
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323
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324 public static String getQueryString(HttpServletRequest request) {
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325 return getQueryString(request,0);
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326 }
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327
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328 public static String getQueryString(HttpServletRequest request,int maxValueLen) {
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329 String method = request.getMethod();
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330 if( method.equals("GET") )
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331 return request.getQueryString();
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332 if( !method.equals("POST") && !method.equals("HEAD") )
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333 throw new RuntimeException(method);
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334 Enumeration en = request.getParameterNames();
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335 StringBuilder queryBuf = new StringBuilder();
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336 if( !en.hasMoreElements() )
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337 return null;
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338 do {
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339 String param = (String)en.nextElement();
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340 String value = request.getParameter(param);
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341 if( maxValueLen > 0 ) {
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342 int len = value.length();
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343 if( len > maxValueLen )
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344 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen);
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345 }
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346 queryBuf.append(param);
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347 queryBuf.append('=');
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348 queryBuf.append(value);
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349 queryBuf.append('&');
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350 } while( en.hasMoreElements() );
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351 queryBuf.deleteCharAt(queryBuf.length() - 1);
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352 return queryBuf.toString();
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353 }
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354
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355 public static String getCurrentURL(HttpServletRequest request) {
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356 return getCurrentURL(request,0);
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357 }
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358
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359 public static String getCurrentURL(HttpServletRequest request,int maxValueLen) {
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360 // StringBuffer buf = HttpUtils.getRequestURL(request);
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361 StringBuffer buf = request.getRequestURL();
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362 String qStr = getQueryString(request,maxValueLen);
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363 if(qStr != null && qStr.length() > 0) {
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364 buf.append('?');
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365 buf.append(qStr);
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366 }
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367 return buf.toString();
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368 }
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369
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370 private static String escape(String value) {
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371 return value.replaceAll(";", "%3B");
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372 }
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373
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374 private static String unescape(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 Cookie getCookie(HttpServletRequest request,String name) {
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379 Cookie[] cookies = request.getCookies();
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380 if( cookies == null )
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381 return null;
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382 for (Cookie cookie : cookies) {
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383 if (cookie.getName().equals(name))
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384 return cookie;
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385 }
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386 return null;
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387 }
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388
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389 public static String getCookieValue(HttpServletRequest request,String name) {
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390 Cookie cookie = getCookie(request,name);
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391 return cookie==null ? null : unescape(cookie.getValue());
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392 }
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393
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394 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) {
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395 Cookie cookie = getCookie(request,name);
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396 if( cookie==null || !cookie.getValue().equals(value) ) {
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397 cookie = new Cookie(name, escape(value));
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398 cookie.setPath("/");
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399 if (domain != null && domain.length() > 0)
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400 cookie.setDomain(domain);
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401 if( isPersistent )
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402 cookie.setMaxAge(10000000);
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403 response.addCookie(cookie);
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404 }
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405 }
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406
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407 public static void removeCookie(HttpServletRequest request,
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408 HttpServletResponse response,
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409 String name,
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410 String domain
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411 ) {
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412 Cookie cookie = getCookie(request, name);
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413 if(cookie != null) {
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414 Cookie delCookie = new Cookie(name, "delete");
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415 delCookie.setPath("/");
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416 delCookie.setMaxAge(0);
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417 if (domain != null && domain.length() > 0)
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418 delCookie.setDomain(domain);
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419 response.addCookie(delCookie);
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420 }
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421 }
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422
222
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423
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424
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425 // util classes
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426
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427 static final class EnumerationIterator<E> implements Iterator<E> {
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428 private final Enumeration<E> en;
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429
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430 EnumerationIterator(Enumeration<E> en) {
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431 this.en = en;
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432 }
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433
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434 @Override public boolean hasNext() {
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435 return en.hasMoreElements();
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436 }
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437
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438 @Override public E next() {
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439 return en.nextElement();
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440 }
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441
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442 @Override public void remove() {
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443 throw new UnsupportedOperationException();
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444 }
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445 }
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446
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447 private static abstract class NameTable extends AbstractLuanTable {
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448 abstract Object get(String name);
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449 abstract Iterator<String> names();
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450
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451 @Override public final Object get(Object key) {
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452 if( !(key instanceof String) )
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453 return null;
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454 String name = (String)key;
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455 return get(name);
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456 }
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457
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458 @Override public final Iterator<Map.Entry<Object,Object>> iterator() {
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459 return new Iterator<Map.Entry<Object,Object>>() {
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460 Iterator<String> names = names();
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461
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462 @Override public boolean hasNext() {
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463 return names.hasNext();
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464 }
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465 @Override public Map.Entry<Object,Object> next() {
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466 String name = names.next();
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467 Object val = get(name);
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468 return new AbstractMap.SimpleEntry<Object,Object>(name,val);
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469 }
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470 @Override public void remove() {
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471 throw new UnsupportedOperationException();
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472 }
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473 };
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474 }
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475 };
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476
226
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477 private static String string(Object value) {
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478 if( !(value instanceof String) )
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479 throw new IllegalArgumentException("value must be string");
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480 return (String)value;
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481 }
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482 }