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annotate web/src/luan/modules/web/HttpServicer.java @ 411:23b99a5039b5

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remove Luan.newTable()
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 29 Apr 2015 16:05:02 -0600
parents 7fd9f1b7b878
children 8937263f59f6
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diff changeset
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.LuanMeta;
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30 import luan.LuanJavaFunction;
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31 import luan.LuanExitException;
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32 import luan.LuanPropertyMeta;
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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
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110 private final HttpServletRequest request;
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111 private final HttpServletResponse response;
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112 // private PrintWriter writer = null;
136
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113 // private ServletOutputStream sos = null;
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114
251
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115 private HttpServicer(HttpServletRequest request,HttpServletResponse response) {
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116 this.request = request;
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117 this.response = response;
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118 }
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119
136
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120 private LuanTable requestTable() throws NoSuchMethodException {
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121 LuanPropertyMeta meta = LuanPropertyMeta.newInstance();
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122 LuanTable tbl = meta.newTable();
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123 tbl.put("java",request);
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124 LuanTable parameters = new NameMeta() {
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125
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126 @Override Object get(String name) {
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127 String[] a = request.getParameterValues(name);
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128 return a==null ? null : a.length==1 ? a[0] : a;
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129 }
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130
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131 @Override Iterator<String> names() {
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132 return new EnumerationIterator<String>(request.getParameterNames());
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133 }
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134 /*
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135 @Override protected String type() {
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136 return "request.parameters-table";
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137 }
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138 */
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139 }.newTable();
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140 tbl.put( "parameters", parameters );
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141 LuanTable headers = new NameMeta() {
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142
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143 @Override Object get(String name) {
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144 return request.getHeader(name);
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145 }
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146
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147 @Override Iterator<String> names() {
313
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148 return new EnumerationIterator<String>(request.getHeaderNames());
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149 }
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150 /*
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151 @Override protected String type() {
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152 return "request.headers-table";
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153 }
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154 */
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155 }.newTable();
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156 tbl.put( "headers", headers );
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157 meta.getters().put( "method", new LuanJavaFunction(
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158 HttpServletRequest.class.getMethod( "getMethod" ), request
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159 ) );
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160 meta.getters().put( "path", new LuanJavaFunction(
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161 HttpServletRequest.class.getMethod( "getRequestURI" ), request
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162 ) );
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163 meta.getters().put( "server_name", new LuanJavaFunction(
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164 HttpServletRequest.class.getMethod( "getServerName" ), request
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165 ) );
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166 meta.getters().put( "url", new LuanJavaFunction(
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167 HttpServicer.class.getMethod( "getURL" ), this
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168 ) );
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169 meta.getters().put( "query_string", new LuanJavaFunction(
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170 HttpServicer.class.getMethod( "getQueryString" ), this
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171 ) );
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172 meta.getters().put( "remote_address", new LuanJavaFunction(
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173 HttpServletRequest.class.getMethod( "getRemoteAddr" ), request
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174 ) );
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175 LuanTable cookies = new LuanMeta() {
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176
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177 @Override public Object __index(LuanState luan,LuanTable tbl,Object key) {
225
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178 if( !(key instanceof String) )
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179 return null;
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180 String name = (String)key;
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181 return getCookieValue(request,name);
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182 }
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183 /*
225
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184 @Override public final Iterator<Map.Entry<Object,Object>> iterator() {
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185 return new Iterator<Map.Entry<Object,Object>>() {
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186 final Cookie[] cookies = request.getCookies();
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187 int i = 0;
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188
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189 @Override public boolean hasNext() {
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190 return i < cookies.length;
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191 }
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192 @Override public Map.Entry<Object,Object> next() {
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193 Cookie cookie = cookies[i++];
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194 String name = cookie.getName();
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195 Object val = unescape(cookie.getValue());
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196 return new AbstractMap.SimpleEntry<Object,Object>(name,val);
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197 }
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198 @Override public void remove() {
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199 throw new UnsupportedOperationException();
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200 }
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201 };
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202 }
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203
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204 @Override protected String type() {
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205 return "request.cookies-table";
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206 }
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207 */
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208 }.newTable();
225
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209 tbl.put( "cookies", cookies );
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210
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211 String contentType = request.getContentType();
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212 if( contentType!=null && contentType.startsWith("multipart/form-data") ) {
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213 try {
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214 InputStream in = new BufferedInputStream(request.getInputStream());
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215 final MultiPartInputStream mpis = new MultiPartInputStream(in,contentType,null,null);
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216 mpis.setDeleteOnExit(true);
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217 parameters = new LuanTable();
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218 for( Part p : mpis.getParts() ) {
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219 final MultiPartInputStream.MultiPart part = (MultiPartInputStream.MultiPart)p;
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220 String name = part.getName();
362
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221 Object value;
361
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222 String filename = part.getContentDispositionFilename();
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223 if( filename == null ) {
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224 value = new String(part.getBytes());
361
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225 } else {
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226 LuanPropertyMeta partMeta = LuanPropertyMeta.newInstance();
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227 LuanTable partTbl = partMeta.newTable();
361
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228 partTbl.put("filename",filename);
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229 partTbl.put("content_type",part.getContentType());
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230 partMeta.getters().put( "content", new LuanFunction() {
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231 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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232 try {
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233 InputStream in = part.getInputStream();
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234 byte[] content = Utils.readAll(in);
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235 in.close();
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236 return content;
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237 } catch(IOException e) {
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238 throw new RuntimeException(e);
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239 }
357
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240 }
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241 } );
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242 value = partTbl;
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243 }
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244 Object old = parameters.get(name);
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245 if( old == null ) {
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246 parameters.put(name,value);
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247 } else if( old instanceof Object[] ) {
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248 Object[] aOld = (Object[])old;
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249 Object[] aNew = new Object[aOld.length+1];
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250 System.arraycopy(aOld,0,aNew,0,aOld.length);
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251 aNew[aOld.length] = value;
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252 parameters.put(name,aNew);
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253 } else {
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254 parameters.put(name,new Object[]{old,value});
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255 }
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256 }
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257 tbl.put( "parameters", parameters );
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258 } catch(IOException e) {
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259 throw new RuntimeException(e);
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260 } catch(ServletException 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
217
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265 return tbl;
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266 }
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267
136
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268 private LuanTable responseTable() throws NoSuchMethodException {
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269 LuanPropertyMeta meta = LuanPropertyMeta.newInstance();
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270 LuanTable tbl = meta.newTable();
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271 tbl.put("java",response);
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272 add( tbl, "send_redirect", String.class );
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273 add( tbl, "send_error", Integer.TYPE, String.class );
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274 LuanTable headers = new NameMeta() {
222
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275
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276 @Override Object get(String name) {
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277 return response.getHeader(name);
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278 }
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279
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280 @Override Iterator<String> names() {
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281 return response.getHeaderNames().iterator();
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282 }
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283
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284 @Override public boolean canNewindex() {
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285 return true;
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286 }
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287
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288 @Override public void __newindex(LuanState luan,LuanTable tbl,Object key,Object val) {
223
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289 if( !(key instanceof String) )
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290 throw new IllegalArgumentException("key must be string for headers table");
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291 String name = (String)key;
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292 if( val instanceof String ) {
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293 response.setHeader(name,(String)val);
224
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294 return;
223
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295 }
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296 Integer i = Luan.asInteger(val);
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297 if( i != null ) {
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298 response.setIntHeader(name,i);
224
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299 return;
223
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300 }
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301 throw new IllegalArgumentException("value must be string or integer for headers table");
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302 }
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303 /*
222
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304 @Override protected String type() {
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305 return "response.headers-table";
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306 }
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307 */
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308 }.newTable();
222
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309 tbl.put( "headers", headers );
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310 meta.getters().put( "content_type", new LuanJavaFunction(
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311 HttpServletResponse.class.getMethod( "getContentType" ), response
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312 ) );
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313 meta.setters().put( "content_type", new LuanJavaFunction(
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314 HttpServletResponse.class.getMethod( "setContentType", String.class ), response
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315 ) );
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316 meta.getters().put( "character_encoding", new LuanJavaFunction(
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317 HttpServletResponse.class.getMethod( "getCharacterEncoding" ), response
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318 ) );
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319 meta.setters().put( "character_encoding", new LuanJavaFunction(
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320 HttpServletResponse.class.getMethod( "setCharacterEncoding", String.class ), response
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321 ) );
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322 add( tbl, "text_writer" );
225
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323 add( tbl, "set_cookie", String.class, String.class, Boolean.TYPE, String.class );
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324 add( tbl, "remove_cookie", String.class, String.class );
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325 meta.getters().put( "status", new LuanJavaFunction(
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326 HttpServletResponse.class.getMethod( "getStatus" ), response
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327 ) );
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328 meta.setters().put( "status", new LuanJavaFunction(
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329 HttpServletResponse.class.getMethod( "setStatus", Integer.TYPE ), response
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330 ) );
217
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331 return tbl;
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332 }
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333
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334 private LuanTable sessionTable() throws NoSuchMethodException {
411
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335 LuanTable tbl = new LuanTable();
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336 LuanTable attributes = new NameMeta() {
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337
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338 @Override Object get(String name) {
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339 return request.getSession().getAttribute(name);
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340 }
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341
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342 @Override Iterator<String> names() {
313
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343 return new EnumerationIterator<String>(request.getSession().getAttributeNames());
222
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344 }
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345
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346 @Override public boolean canNewindex() {
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347 return true;
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348 }
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349
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350 @Override public void __newindex(LuanState luan,LuanTable tbl,Object key,Object val) {
222
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351 if( !(key instanceof String) )
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352 throw new IllegalArgumentException("key must be string for session attributes table");
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353 String name = (String)key;
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354 request.getSession().setAttribute(name,val);
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355 }
405
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356 /*
222
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357 @Override protected String type() {
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358 return "session.attributes-table";
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359 }
405
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360 */
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361 }.newTable();
222
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362 tbl.put( "attributes", attributes );
217
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363 return tbl;
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364 }
89
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365
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366 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
251
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367 t.put( method, new LuanJavaFunction(HttpServicer.class.getMethod(method,parameterTypes),this) );
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368 }
138
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369 /*
136
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370 public void text_write(LuanState luan,Object... args) throws LuanException, IOException {
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371 if( writer == null )
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372 writer = response.getWriter();
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373 for( Object obj : args ) {
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374 writer.print( luan.toString(obj) );
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375 }
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376 }
138
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377 */
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378 public LuanTable text_writer() throws IOException {
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379 return IoLuan.textWriter(response.getWriter());
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380 }
136
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381
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382 public void send_redirect(String redirectUrl)
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383 throws IOException
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384 {
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385 response.sendRedirect(redirectUrl);
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386 throw new LuanExitException();
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387 }
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388
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389 public void send_error(int code,String text)
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390 throws IOException
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391 {
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392 response.sendError(code, text);
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393 throw new LuanExitException();
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394 }
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395
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396 public void set_cookie(String name,String value,boolean isPersistent, String domain) {
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397 setCookie(request,response,name,value,isPersistent,domain);
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398 }
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399
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400 public void remove_cookie(String name, String domain) {
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401 removeCookie(request,response,name,domain);
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402 }
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403
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404
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405 // static utils
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406
407
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407 public String getQueryString() {
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408 return getQueryString(request);
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409 }
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410
89
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411 public static String getQueryString(HttpServletRequest request) {
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412 return getQueryString(request,0);
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413 }
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414
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415 public static String getQueryString(HttpServletRequest request,int maxValueLen) {
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416 String method = request.getMethod();
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417 if( method.equals("GET") )
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418 return request.getQueryString();
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419 if( !method.equals("POST") && !method.equals("HEAD") )
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420 throw new RuntimeException(method);
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421 Enumeration en = request.getParameterNames();
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422 StringBuilder queryBuf = new StringBuilder();
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423 if( !en.hasMoreElements() )
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424 return null;
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425 do {
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426 String param = (String)en.nextElement();
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427 String value = request.getParameter(param);
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428 if( maxValueLen > 0 ) {
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429 int len = value.length();
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430 if( len > maxValueLen )
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431 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen);
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432 }
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433 queryBuf.append(param);
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434 queryBuf.append('=');
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435 queryBuf.append(value);
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436 queryBuf.append('&');
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437 } while( en.hasMoreElements() );
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438 queryBuf.deleteCharAt(queryBuf.length() - 1);
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439 return queryBuf.toString();
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440 }
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441
407
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442 public String getURL() {
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443 return getURL(request);
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444 }
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445
313
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446 public static String getURL(HttpServletRequest request) {
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447 return getURL(request,0);
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448 }
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449
313
1f6d828986b9 replace Http.request.servlet_path with Http.request.path;
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450 public static String getURL(HttpServletRequest request,int maxValueLen) {
89
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451 // StringBuffer buf = HttpUtils.getRequestURL(request);
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452 StringBuffer buf = request.getRequestURL();
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453 String qStr = getQueryString(request,maxValueLen);
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454 if(qStr != null && qStr.length() > 0) {
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455 buf.append('?');
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456 buf.append(qStr);
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457 }
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458 return buf.toString();
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459 }
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460
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461 private static String escape(String value) {
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462 return value.replaceAll(";", "%3B");
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463 }
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464
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465 private static String unescape(String value) {
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466 return value.replaceAll("%3B", ";");
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467 }
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468
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469 private static Cookie getCookie(HttpServletRequest request,String name) {
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470 Cookie[] cookies = request.getCookies();
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471 if( cookies == null )
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472 return null;
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473 for (Cookie cookie : cookies) {
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474 if (cookie.getName().equals(name))
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475 return cookie;
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476 }
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477 return null;
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478 }
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479
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480 public static String getCookieValue(HttpServletRequest request,String name) {
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481 Cookie cookie = getCookie(request,name);
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482 return cookie==null ? null : unescape(cookie.getValue());
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483 }
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484
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485 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) {
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486 Cookie cookie = getCookie(request,name);
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487 if( cookie==null || !cookie.getValue().equals(value) ) {
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488 cookie = new Cookie(name, escape(value));
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diff changeset
489 cookie.setPath("/");
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490 if (domain != null && domain.length() > 0)
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491 cookie.setDomain(domain);
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492 if( isPersistent )
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493 cookie.setMaxAge(10000000);
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494 response.addCookie(cookie);
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495 }
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496 }
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497
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498 public static void removeCookie(HttpServletRequest request,
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499 HttpServletResponse response,
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500 String name,
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501 String domain
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502 ) {
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503 Cookie cookie = getCookie(request, name);
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diff changeset
504 if(cookie != null) {
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diff changeset
505 Cookie delCookie = new Cookie(name, "delete");
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diff changeset
506 delCookie.setPath("/");
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507 delCookie.setMaxAge(0);
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parents: 88
diff changeset
508 if (domain != null && domain.length() > 0)
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diff changeset
509 delCookie.setDomain(domain);
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diff changeset
510 response.addCookie(delCookie);
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diff changeset
511 }
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512 }
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diff changeset
513
222
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514
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diff changeset
515
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diff changeset
516 // util classes
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diff changeset
517
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diff changeset
518 static final class EnumerationIterator<E> implements Iterator<E> {
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diff changeset
519 private final Enumeration<E> en;
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parents: 221
diff changeset
520
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diff changeset
521 EnumerationIterator(Enumeration<E> en) {
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diff changeset
522 this.en = en;
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diff changeset
523 }
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diff changeset
524
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parents: 221
diff changeset
525 @Override public boolean hasNext() {
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parents: 221
diff changeset
526 return en.hasMoreElements();
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527 }
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diff changeset
528
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parents: 221
diff changeset
529 @Override public E next() {
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diff changeset
530 return en.nextElement();
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parents: 221
diff changeset
531 }
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parents: 221
diff changeset
532
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diff changeset
533 @Override public void remove() {
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diff changeset
534 throw new UnsupportedOperationException();
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535 }
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diff changeset
536 }
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diff changeset
537
405
3e68917a0dc6 add LuanMeta
Franklin Schmidt <fschmidt@gmail.com>
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diff changeset
538 private static abstract class NameMeta extends LuanMeta {
222
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diff changeset
539 abstract Object get(String name);
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diff changeset
540 abstract Iterator<String> names();
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541
405
3e68917a0dc6 add LuanMeta
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parents: 377
diff changeset
542 @Override public Object __index(LuanState luan,LuanTable tbl,Object key) {
222
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diff changeset
543 if( !(key instanceof String) )
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diff changeset
544 return null;
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diff changeset
545 String name = (String)key;
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parents: 221
diff changeset
546 return get(name);
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547 }
405
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diff changeset
548 /*
222
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diff changeset
549 @Override public final Iterator<Map.Entry<Object,Object>> iterator() {
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
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parents: 221
diff changeset
550 return new Iterator<Map.Entry<Object,Object>>() {
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diff changeset
551 Iterator<String> names = names();
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parents: 221
diff changeset
552
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553 @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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554 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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555 }
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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556 @Override public Map.Entry<Object,Object> next() {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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557 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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558 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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559 return new AbstractMap.SimpleEntry<Object,Object>(name,val);
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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560 }
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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561 @Override public void remove() {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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562 throw new UnsupportedOperationException();
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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563 }
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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564 };
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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565 }
405
3e68917a0dc6 add LuanMeta
Franklin Schmidt <fschmidt@gmail.com>
parents: 377
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566 */
222
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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567 };
b76fcb72d97d add AbstractLuanTable and improve HttpLuan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 221
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568
226
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 225
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569 private static String string(Object value) {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 225
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570 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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571 throw new IllegalArgumentException("value must be string");
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 225
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572 return (String)value;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 225
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573 }
76
97b03fc807ad add HttpLib and WebServlet
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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574 }