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annotate web/src/luan/modules/web/HttpServicer.java @ 358:6fc33c20441b

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minor
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 14 Apr 2015 12:07:49 -0600
parents 496d61b1fb5a
children 8848edb0e6bf
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1 package luan.modules.web;
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2
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3 import java.io.InputStream;
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4 import java.io.BufferedInputStream;
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5 import java.io.PrintWriter;
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6 import java.io.IOException;
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7 import java.util.Map;
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8 import java.util.AbstractMap;
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9 import java.util.Set;
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10 import java.util.List;
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11 import java.util.ArrayList;
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12 import java.util.Arrays;
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13 import java.util.Iterator;
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14 import java.util.Enumeration;
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15 import javax.servlet.ServletOutputStream;
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16 import javax.servlet.ServletException;
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17 import javax.servlet.http.Cookie;
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18 import javax.servlet.http.HttpServletRequest;
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19 import javax.servlet.http.HttpServletResponse;
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20 import javax.servlet.http.HttpSession;
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21 import javax.servlet.http.Part;
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22 import org.eclipse.jetty.util.MultiPartInputStream;
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23 import luan.Luan;
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24 import luan.LuanState;
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25 import luan.LuanFunction;
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26 import luan.LuanElement;
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27 import luan.LuanException;
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28 import luan.LuanTable;
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29 import luan.AbstractLuanTable;
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30 import luan.LuanJavaFunction;
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31 import luan.LuanExitException;
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32 import luan.LuanProperty;
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33 import luan.DeepCloner;
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34 import luan.modules.PackageLuan;
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35 import luan.modules.IoLuan;
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36 import luan.modules.TableLuan;
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37 import luan.modules.Utils;
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38
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39
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40 public final class HttpServicer {
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42 public static boolean service(LuanState luan,HttpServletRequest request,HttpServletResponse response,String modName)
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43 throws LuanException
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44 {
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45 LuanFunction fn;
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46 synchronized(luan) {
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47 Object mod = PackageLuan.load(luan,modName);
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48 if( mod==null )
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49 return false;
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50 if( !(mod instanceof LuanTable) )
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51 throw luan.exception( "module '"+modName+"' must return a table" );
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52 LuanTable tbl = (LuanTable)mod;
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53 if( Luan.toBoolean( tbl.get("per_session") ) ) {
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54 HttpSession session = request.getSession();
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55 LuanState sessionLuan = (LuanState)session.getValue("luan");
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56 if( sessionLuan!=null ) {
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57 luan = sessionLuan;
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58 } else {
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59 DeepCloner cloner = new DeepCloner();
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60 luan = cloner.deepClone(luan);
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61 session.putValue("luan",luan);
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62 }
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63 tbl = (LuanTable)PackageLuan.require(luan,modName);
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64 fn = getService(luan,tbl);
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65 } else {
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66 fn = getService(luan,tbl);
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67 DeepCloner cloner = new DeepCloner();
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68 luan = cloner.deepClone(luan);
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69 fn = cloner.get(fn);
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70 }
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71 }
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72
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73 LuanTable module = (LuanTable)PackageLuan.loaded(luan).get("luan:web/Http");
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74 if( module == null )
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75 throw luan.exception( "module 'web/Http' not defined" );
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76 HttpServicer lib = new HttpServicer(request,response);
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77 try {
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78 module.put( "request", lib.requestTable() );
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79 module.put( "response", lib.responseTable() );
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80 module.put( "session", lib.sessionTable() );
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81 /*
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82 module.put( "write", new LuanJavaFunction(
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83 HttpServicer.class.getMethod( "text_write", LuanState.class, new Object[0].getClass() ), lib
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84 ) );
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85 */
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86 } catch(NoSuchMethodException e) {
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87 throw new RuntimeException(e);
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88 }
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89
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90 try {
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91 luan.call(fn,"<http>");
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92 } catch(LuanExitException e) {
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93 // System.out.println("caught LuanExitException");
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94 }
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95 return true;
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96 }
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97
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98 private static LuanFunction getService(LuanState luan,LuanTable tbl)
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99 throws LuanException
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100 {
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101 Object service = tbl.get("service");
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102 if( service == null )
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103 throw luan.exception( "function 'service' is not defined" );
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104 if( !(service instanceof LuanFunction) )
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105 throw luan.exception( "'service' must be a function but is a " + Luan.type(service) );
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106 return (LuanFunction)service;
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107 }
136
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108
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109
76
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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;
136
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113 // private ServletOutputStream sos = null;
357
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114 private LuanTable parts = null;
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115
251
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116 private HttpServicer(HttpServletRequest request,HttpServletResponse response) {
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117 this.request = request;
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118 this.response = response;
136
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119 }
89
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120
136
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121 private LuanTable requestTable() throws NoSuchMethodException {
226
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122 LuanTable tbl = Luan.newPropertyTable();
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123 tbl.put("java",request);
222
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124 LuanTable parameters = new NameTable() {
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125
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126 @Override Object get(String name) {
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127 return request.getParameter(name);
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128 }
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129
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130 @Override Iterator<String> names() {
313
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131 return new EnumerationIterator<String>(request.getParameterNames());
222
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132 }
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133
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134 @Override protected String type() {
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135 return "request.parameters-table";
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136 }
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137 };
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138 tbl.put( "parameters", parameters );
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139 add( tbl, "get_parameter_values", String.class );
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140 LuanTable headers = new NameTable() {
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141
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142 @Override Object get(String name) {
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143 return request.getHeader(name);
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144 }
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145
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146 @Override Iterator<String> names() {
313
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147 return new EnumerationIterator<String>(request.getHeaderNames());
222
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148 }
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149
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150 @Override protected String type() {
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151 return "request.headers-table";
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152 }
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153 };
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154 tbl.put( "headers", headers );
227
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155 tbl.put( "method", new LuanProperty() { public Object get() {
226
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156 return request.getMethod();
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157 } } );
313
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158 /*
227
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159 tbl.put( "servlet_path", new LuanProperty() { public Object get() {
226
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160 return request.getServletPath();
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161 } } );
313
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162 */
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163 tbl.put( "path", new LuanProperty() { public Object get() {
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164 return request.getRequestURI();
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165 } } );
227
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166 tbl.put( "server_name", new LuanProperty() { public Object get() {
226
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167 return request.getServerName();
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168 } } );
313
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169 tbl.put( "url", new LuanProperty() { public Object get() {
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170 return getURL(request);
226
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171 } } );
283
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172 tbl.put( "query_string", new LuanProperty() { public Object get() {
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173 return getQueryString(request);
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174 } } );
227
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175 tbl.put( "remote_address", new LuanProperty() { public Object get() {
226
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176 return request.getRemoteAddr();
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177 } } );
225
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178 LuanTable cookies = new AbstractLuanTable() {
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179
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180 @Override public final Object get(Object key) {
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181 if( !(key instanceof String) )
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182 return null;
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183 String name = (String)key;
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184 return getCookieValue(request,name);
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185 }
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186
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187 @Override public final Iterator<Map.Entry<Object,Object>> iterator() {
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188 return new Iterator<Map.Entry<Object,Object>>() {
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189 final Cookie[] cookies = request.getCookies();
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190 int i = 0;
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191
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192 @Override public boolean hasNext() {
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193 return i < cookies.length;
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194 }
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195 @Override public Map.Entry<Object,Object> next() {
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196 Cookie cookie = cookies[i++];
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197 String name = cookie.getName();
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198 Object val = unescape(cookie.getValue());
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199 return new AbstractMap.SimpleEntry<Object,Object>(name,val);
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200 }
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201 @Override public void remove() {
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202 throw new UnsupportedOperationException();
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203 }
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204 };
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205 }
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206
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207 @Override protected String type() {
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208 return "request.cookies-table";
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209 }
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210 };
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211 tbl.put( "cookies", cookies );
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212
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213 tbl.put( "parts", new LuanProperty() { public Object get() {
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214 if( parts == null ) {
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215 String contentType = request.getContentType();
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216 if( contentType!=null && contentType.startsWith("multipart/form-data") ) {
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217 try {
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218 InputStream in = new BufferedInputStream(request.getInputStream());
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219 final MultiPartInputStream mpis = new MultiPartInputStream(in,contentType,null,null);
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220 parts = new NameTable() {
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221
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222 @Override Object get(String name) {
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223 try {
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224 MultiPartInputStream.MultiPart part = (MultiPartInputStream.MultiPart)mpis.getPart(name);
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225 if( part==null )
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226 return null;
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227 LuanTable tbl = Luan.newTable();
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228 tbl.put("filename",part.getContentDispositionFilename());
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229 tbl.put("content_type",part.getContentType());
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230 InputStream in = part.getInputStream();
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231 byte[] content = Utils.readAll(in);
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232 in.close();
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233 tbl.put("content",content);
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234 return tbl;
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235 } catch(IOException e) {
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236 throw new RuntimeException(e);
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237 } catch(ServletException e) {
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238 throw new RuntimeException(e);
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239 }
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240 }
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241
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242 @Override Iterator<String> names() {
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243 try {
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244 List<String> names = new ArrayList<String>();
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245 for( Part part : mpis.getParts() ) {
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246 names.add(part.getName());
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247 }
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248 return names.iterator();
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249 } catch(IOException e) {
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250 throw new RuntimeException(e);
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251 } catch(ServletException e) {
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252 throw new RuntimeException(e);
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253 }
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254 }
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255
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256 @Override protected String type() {
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257 return "request.parts-table";
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258 }
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259 };
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260 } catch(IOException e) {
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261 throw new RuntimeException(e);
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262 }
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263 }
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264 }
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265 return parts;
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266 } } );
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267
217
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268 return tbl;
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269 }
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270
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271 private LuanTable responseTable() throws NoSuchMethodException {
226
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272 LuanTable tbl = Luan.newPropertyTable();
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273 tbl.put("java",response);
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274 add( tbl, "send_redirect", String.class );
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275 add( tbl, "send_error", Integer.TYPE, String.class );
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276 LuanTable headers = new NameTable() {
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277
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278 @Override Object get(String name) {
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279 return response.getHeader(name);
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280 }
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281
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282 @Override Iterator<String> names() {
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283 return response.getHeaderNames().iterator();
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284 }
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285
224
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286 @Override public void put(Object key,Object val) {
223
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287 if( !(key instanceof String) )
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288 throw new IllegalArgumentException("key must be string for headers table");
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289 String name = (String)key;
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290 if( val instanceof String ) {
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291 response.setHeader(name,(String)val);
224
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292 return;
223
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293 }
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294 Integer i = Luan.asInteger(val);
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295 if( i != null ) {
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296 response.setIntHeader(name,i);
224
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297 return;
223
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298 }
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299 throw new IllegalArgumentException("value must be string or integer for headers table");
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300 }
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301
222
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302 @Override protected String type() {
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303 return "response.headers-table";
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304 }
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305 };
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306 tbl.put( "headers", headers );
227
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307 tbl.put( "content_type", new LuanProperty() {
226
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308 @Override public Object get() {
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309 return response.getContentType();
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310 }
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311 @Override public boolean set(Object value) {
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312 response.setContentType(string(value)); return true;
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313 }
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314 } );
227
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315 tbl.put( "character_encoding", new LuanProperty() {
226
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316 @Override public Object get() {
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317 return response.getCharacterEncoding();
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318 }
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319 @Override public boolean set(Object value) {
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320 response.setCharacterEncoding(string(value)); return true;
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321 }
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322 } );
217
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323 add( tbl, "text_writer" );
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324 add( tbl, "set_cookie", String.class, String.class, Boolean.TYPE, String.class );
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325 add( tbl, "remove_cookie", String.class, String.class );
217
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326 return tbl;
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327 }
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328
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329 private LuanTable sessionTable() throws NoSuchMethodException {
221
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330 LuanTable tbl = Luan.newTable();
222
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331 LuanTable attributes = new NameTable() {
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332
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333 @Override Object get(String name) {
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334 return request.getSession().getAttribute(name);
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335 }
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336
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337 @Override Iterator<String> names() {
313
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338 return new EnumerationIterator<String>(request.getSession().getAttributeNames());
222
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339 }
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340
224
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341 @Override public void put(Object key,Object val) {
222
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342 if( !(key instanceof String) )
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343 throw new IllegalArgumentException("key must be string for session attributes table");
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344 String name = (String)key;
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345 request.getSession().setAttribute(name,val);
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346 }
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347
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348 @Override protected String type() {
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349 return "session.attributes-table";
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350 }
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351 };
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352 tbl.put( "attributes", attributes );
217
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353 return tbl;
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354 }
89
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355
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356 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
251
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357 t.put( method, new LuanJavaFunction(HttpServicer.class.getMethod(method,parameterTypes),this) );
89
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358 }
138
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359 /*
136
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360 public void text_write(LuanState luan,Object... args) throws LuanException, IOException {
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361 if( writer == null )
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362 writer = response.getWriter();
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363 for( Object obj : args ) {
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364 writer.print( luan.toString(obj) );
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365 }
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366 }
138
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367 */
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368 public LuanTable text_writer() throws IOException {
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369 return IoLuan.textWriter(response.getWriter());
138
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370 }
136
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371
222
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372 public LuanTable get_parameter_values(String name) {
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373 Object[] a = request.getParameterValues(name);
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374 return a==null ? null : TableLuan.pack(a);
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375 }
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376
89
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377 public void send_redirect(String redirectUrl)
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378 throws IOException
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379 {
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380 response.sendRedirect(redirectUrl);
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381 throw new LuanExitException();
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382 }
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383
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384 public void send_error(int code,String text)
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385 throws IOException
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386 {
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387 response.sendError(code, text);
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388 throw new LuanExitException();
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389 }
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390
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391 public void set_cookie(String name,String value,boolean isPersistent, String domain) {
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392 setCookie(request,response,name,value,isPersistent,domain);
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393 }
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394
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395 public void remove_cookie(String name, String domain) {
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396 removeCookie(request,response,name,domain);
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397 }
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398
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399
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400 // static utils
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401
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402 public static String getQueryString(HttpServletRequest request) {
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403 return getQueryString(request,0);
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404 }
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405
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406 public static String getQueryString(HttpServletRequest request,int maxValueLen) {
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407 String method = request.getMethod();
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408 if( method.equals("GET") )
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409 return request.getQueryString();
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410 if( !method.equals("POST") && !method.equals("HEAD") )
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411 throw new RuntimeException(method);
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412 Enumeration en = request.getParameterNames();
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413 StringBuilder queryBuf = new StringBuilder();
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414 if( !en.hasMoreElements() )
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415 return null;
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416 do {
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417 String param = (String)en.nextElement();
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418 String value = request.getParameter(param);
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419 if( maxValueLen > 0 ) {
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420 int len = value.length();
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421 if( len > maxValueLen )
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422 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen);
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423 }
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424 queryBuf.append(param);
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425 queryBuf.append('=');
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426 queryBuf.append(value);
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427 queryBuf.append('&');
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428 } while( en.hasMoreElements() );
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429 queryBuf.deleteCharAt(queryBuf.length() - 1);
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430 return queryBuf.toString();
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431 }
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432
313
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433 public static String getURL(HttpServletRequest request) {
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434 return getURL(request,0);
89
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435 }
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436
313
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437 public static String getURL(HttpServletRequest request,int maxValueLen) {
89
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438 // StringBuffer buf = HttpUtils.getRequestURL(request);
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439 StringBuffer buf = request.getRequestURL();
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440 String qStr = getQueryString(request,maxValueLen);
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441 if(qStr != null && qStr.length() > 0) {
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442 buf.append('?');
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443 buf.append(qStr);
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444 }
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445 return buf.toString();
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446 }
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447
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448 private static String escape(String value) {
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449 return value.replaceAll(";", "%3B");
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450 }
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451
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452 private static String unescape(String value) {
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453 return value.replaceAll("%3B", ";");
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454 }
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455
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456 private static Cookie getCookie(HttpServletRequest request,String name) {
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457 Cookie[] cookies = request.getCookies();
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458 if( cookies == null )
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459 return null;
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460 for (Cookie cookie : cookies) {
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461 if (cookie.getName().equals(name))
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462 return cookie;
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463 }
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464 return null;
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465 }
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466
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467 public static String getCookieValue(HttpServletRequest request,String name) {
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468 Cookie cookie = getCookie(request,name);
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469 return cookie==null ? null : unescape(cookie.getValue());
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470 }
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471
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472 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) {
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473 Cookie cookie = getCookie(request,name);
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474 if( cookie==null || !cookie.getValue().equals(value) ) {
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475 cookie = new Cookie(name, escape(value));
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476 cookie.setPath("/");
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477 if (domain != null && domain.length() > 0)
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478 cookie.setDomain(domain);
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479 if( isPersistent )
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480 cookie.setMaxAge(10000000);
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481 response.addCookie(cookie);
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482 }
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483 }
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484
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485 public static void removeCookie(HttpServletRequest request,
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486 HttpServletResponse response,
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487 String name,
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488 String domain
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489 ) {
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490 Cookie cookie = getCookie(request, name);
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491 if(cookie != null) {
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492 Cookie delCookie = new Cookie(name, "delete");
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493 delCookie.setPath("/");
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494 delCookie.setMaxAge(0);
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495 if (domain != null && domain.length() > 0)
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496 delCookie.setDomain(domain);
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497 response.addCookie(delCookie);
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498 }
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499 }
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500
222
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501
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502
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503 // util classes
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504
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505 static final class EnumerationIterator<E> implements Iterator<E> {
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506 private final Enumeration<E> en;
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507
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508 EnumerationIterator(Enumeration<E> en) {
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509 this.en = en;
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510 }
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511
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diff changeset
512 @Override public boolean hasNext() {
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513 return en.hasMoreElements();
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514 }
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diff changeset
515
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diff changeset
516 @Override public E next() {
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517 return en.nextElement();
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518 }
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diff changeset
519
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diff changeset
520 @Override public void remove() {
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diff changeset
521 throw new UnsupportedOperationException();
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522 }
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523 }
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diff changeset
524
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diff changeset
525 private static abstract class NameTable extends AbstractLuanTable {
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diff changeset
526 abstract Object get(String name);
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527 abstract Iterator<String> names();
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528
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diff changeset
529 @Override public final Object get(Object key) {
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diff changeset
530 if( !(key instanceof String) )
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diff changeset
531 return null;
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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532 String name = (String)key;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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533 return get(name);
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
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534 }
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535
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
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536 @Override public final Iterator<Map.Entry<Object,Object>> iterator() {
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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537 return new Iterator<Map.Entry<Object,Object>>() {
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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538 Iterator<String> names = names();
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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539
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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540 @Override public boolean hasNext() {
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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541 return names.hasNext();
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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542 }
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
diff changeset
543 @Override public Map.Entry<Object,Object> next() {
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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544 String name = names.next();
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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545 Object val = get(name);
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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546 return new AbstractMap.SimpleEntry<Object,Object>(name,val);
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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547 }
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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548 @Override public void remove() {
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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549 throw new UnsupportedOperationException();
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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550 }
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551 };
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parents: 221
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552 }
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parents: 221
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553 };
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
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parents: 221
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554
226
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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555 private static String string(Object value) {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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556 if( !(value instanceof String) )
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 225
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557 throw new IllegalArgumentException("value must be string");
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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558 return (String)value;
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559 }
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560 }