Mercurial Hosting > luan
annotate web/src/luan/modules/web/HttpServicer.java @ 415:ce8e19567911
make LuanPropertyMeta a singleton
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 30 Apr 2015 06:04:17 -0600 |
parents | 8937263f59f6 |
children | 91af5337b9ae |
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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; |
413 | 8 import java.util.HashMap; |
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9 import java.util.AbstractMap; |
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10 import java.util.Set; |
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11 import java.util.List; |
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12 import java.util.ArrayList; |
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13 import java.util.Arrays; |
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14 import java.util.Iterator; |
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15 import java.util.Enumeration; |
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16 import javax.servlet.ServletOutputStream; |
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17 import javax.servlet.ServletException; |
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18 import javax.servlet.http.Cookie; |
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19 import javax.servlet.http.HttpServletRequest; |
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20 import javax.servlet.http.HttpServletResponse; |
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21 import javax.servlet.http.HttpSession; |
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22 import javax.servlet.http.Part; |
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23 import org.eclipse.jetty.util.MultiPartInputStream; |
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24 import luan.Luan; |
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25 import luan.LuanState; |
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26 import luan.LuanFunction; |
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27 import luan.LuanElement; |
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28 import luan.LuanException; |
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29 import luan.LuanTable; |
405 | 30 import luan.LuanMeta; |
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31 import luan.LuanJavaFunction; |
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32 import luan.LuanExitException; |
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33 import luan.LuanPropertyMeta; |
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34 import luan.DeepCloner; |
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35 import luan.modules.PackageLuan; |
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36 import luan.modules.IoLuan; |
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37 import luan.modules.TableLuan; |
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38 import luan.modules.Utils; |
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39 |
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40 |
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41 public final class HttpServicer { |
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42 |
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43 public static boolean service(LuanState luan,HttpServletRequest request,HttpServletResponse response,String modName) |
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44 throws LuanException |
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45 { |
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46 LuanFunction fn; |
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47 synchronized(luan) { |
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48 Object mod = PackageLuan.load(luan,modName); |
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49 if( mod==null ) |
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50 return false; |
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51 if( !(mod instanceof LuanTable) ) |
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52 throw luan.exception( "module '"+modName+"' must return a table" ); |
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53 LuanTable tbl = (LuanTable)mod; |
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54 if( Luan.toBoolean( tbl.get("per_session") ) ) { |
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55 HttpSession session = request.getSession(); |
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56 LuanState sessionLuan = (LuanState)session.getValue("luan"); |
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57 if( sessionLuan!=null ) { |
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58 luan = sessionLuan; |
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59 } else { |
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60 DeepCloner cloner = new DeepCloner(); |
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61 luan = cloner.deepClone(luan); |
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62 session.putValue("luan",luan); |
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63 } |
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64 tbl = (LuanTable)PackageLuan.require(luan,modName); |
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65 fn = getService(luan,tbl); |
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66 } else { |
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67 fn = getService(luan,tbl); |
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68 DeepCloner cloner = new DeepCloner(); |
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69 luan = cloner.deepClone(luan); |
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70 fn = cloner.get(fn); |
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71 } |
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72 } |
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73 |
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74 LuanTable module = (LuanTable)PackageLuan.loaded(luan).get("luan:web/Http"); |
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75 if( module == null ) |
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76 throw luan.exception( "module 'web/Http' not defined" ); |
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77 HttpServicer lib = new HttpServicer(request,response); |
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78 try { |
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79 module.put( "request", lib.requestTable() ); |
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80 module.put( "response", lib.responseTable() ); |
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81 module.put( "session", lib.sessionTable() ); |
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82 /* |
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83 module.put( "write", new LuanJavaFunction( |
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84 HttpServicer.class.getMethod( "text_write", LuanState.class, new Object[0].getClass() ), lib |
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85 ) ); |
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86 */ |
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87 } catch(NoSuchMethodException e) { |
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88 throw new RuntimeException(e); |
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89 } |
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90 |
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91 try { |
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92 luan.call(fn,"<http>"); |
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93 } catch(LuanExitException e) { |
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94 // System.out.println("caught LuanExitException"); |
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95 } |
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96 return true; |
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97 } |
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98 |
325
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99 private static LuanFunction getService(LuanState luan,LuanTable tbl) |
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100 throws LuanException |
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101 { |
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102 Object service = tbl.get("service"); |
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103 if( service == null ) |
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104 throw luan.exception( "function 'service' is not defined" ); |
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105 if( !(service instanceof LuanFunction) ) |
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106 throw luan.exception( "'service' must be a function but is a " + Luan.type(service) ); |
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107 return (LuanFunction)service; |
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108 } |
136
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109 |
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110 |
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111 private final HttpServletRequest request; |
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112 private final HttpServletResponse response; |
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113 // private PrintWriter writer = null; |
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114 // private ServletOutputStream sos = null; |
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115 |
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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; |
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119 } |
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120 |
136
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121 private LuanTable requestTable() throws NoSuchMethodException { |
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122 LuanTable tbl = LuanPropertyMeta.INSTANCE.newTable(); |
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123 LuanTable getters = LuanPropertyMeta.INSTANCE.getters(tbl); |
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124 tbl.put("java",request); |
405 | 125 LuanTable parameters = new NameMeta() { |
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126 |
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127 @Override Object get(String name) { |
413 | 128 return request.getParameter(name); |
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129 } |
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130 |
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131 @Override protected Iterator keys(LuanTable tbl) { |
413 | 132 return new EnumerationIterator(request.getParameterNames()); |
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133 } |
405 | 134 /* |
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135 @Override protected String type() { |
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136 return "request.parameters-table"; |
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137 } |
405 | 138 */ |
139 }.newTable(); | |
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140 tbl.put( "parameters", parameters ); |
413 | 141 add( tbl, "get_parameter_values", String.class ); |
405 | 142 LuanTable headers = new NameMeta() { |
222
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143 |
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144 @Override Object get(String name) { |
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145 return request.getHeader(name); |
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146 } |
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147 |
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148 @Override protected Iterator keys(LuanTable tbl) { |
413 | 149 return new EnumerationIterator(request.getHeaderNames()); |
222
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150 } |
405 | 151 /* |
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152 @Override protected String type() { |
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153 return "request.headers-table"; |
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154 } |
405 | 155 */ |
156 }.newTable(); | |
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157 tbl.put( "headers", headers ); |
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158 getters.put( "method", new LuanJavaFunction( |
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159 HttpServletRequest.class.getMethod( "getMethod" ), request |
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160 ) ); |
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161 getters.put( "path", new LuanJavaFunction( |
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162 HttpServletRequest.class.getMethod( "getRequestURI" ), request |
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163 ) ); |
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164 getters.put( "server_name", new LuanJavaFunction( |
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165 HttpServletRequest.class.getMethod( "getServerName" ), request |
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166 ) ); |
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167 getters.put( "url", new LuanJavaFunction( |
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168 HttpServicer.class.getMethod( "getURL" ), this |
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169 ) ); |
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170 getters.put( "query_string", new LuanJavaFunction( |
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171 HttpServicer.class.getMethod( "getQueryString" ), this |
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172 ) ); |
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173 getters.put( "remote_address", new LuanJavaFunction( |
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174 HttpServletRequest.class.getMethod( "getRemoteAddr" ), request |
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175 ) ); |
405 | 176 LuanTable cookies = new LuanMeta() { |
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177 |
405 | 178 @Override public Object __index(LuanState luan,LuanTable tbl,Object key) { |
225
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179 if( !(key instanceof String) ) |
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180 return null; |
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181 String name = (String)key; |
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182 return getCookieValue(request,name); |
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183 } |
413 | 184 |
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185 @Override protected Iterator<Object> keys(LuanTable tbl) { |
413 | 186 return new Iterator<Object>() { |
225
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187 final Cookie[] cookies = request.getCookies(); |
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188 int i = 0; |
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189 |
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190 @Override public boolean hasNext() { |
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191 return i < cookies.length; |
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192 } |
413 | 193 @Override public Object next() { |
194 return cookies[i++].getName(); | |
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195 } |
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196 @Override public void remove() { |
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197 throw new UnsupportedOperationException(); |
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198 } |
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199 }; |
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200 } |
413 | 201 /* |
225
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202 @Override protected String type() { |
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203 return "request.cookies-table"; |
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204 } |
405 | 205 */ |
206 }.newTable(); | |
225
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207 tbl.put( "cookies", cookies ); |
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208 |
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209 String contentType = request.getContentType(); |
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210 if( contentType!=null && contentType.startsWith("multipart/form-data") ) { |
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211 try { |
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212 InputStream in = new BufferedInputStream(request.getInputStream()); |
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213 final MultiPartInputStream mpis = new MultiPartInputStream(in,contentType,null,null); |
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214 mpis.setDeleteOnExit(true); |
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215 parameters = new LuanTable(); |
413 | 216 final Map map = new HashMap(); |
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217 for( Part p : mpis.getParts() ) { |
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218 final MultiPartInputStream.MultiPart part = (MultiPartInputStream.MultiPart)p; |
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219 String name = part.getName(); |
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220 Object value; |
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221 String filename = part.getContentDispositionFilename(); |
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222 if( filename == null ) { |
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223 value = new String(part.getBytes()); |
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224 } else { |
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225 LuanTable partTbl = LuanPropertyMeta.INSTANCE.newTable(); |
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226 partTbl.put("filename",filename); |
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227 partTbl.put("content_type",part.getContentType()); |
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228 LuanPropertyMeta.INSTANCE.getters(partTbl).put( "content", new LuanFunction() { |
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229 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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230 try { |
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231 InputStream in = part.getInputStream(); |
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232 byte[] content = Utils.readAll(in); |
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233 in.close(); |
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234 return content; |
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235 } catch(IOException e) { |
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236 throw new RuntimeException(e); |
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237 } |
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238 } |
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239 } ); |
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240 value = partTbl; |
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241 } |
413 | 242 parameters.put(name,value); |
243 Object old = map.get(name); | |
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244 if( old == null ) { |
413 | 245 map.put(name,value); |
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246 } else if( old instanceof Object[] ) { |
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247 Object[] aOld = (Object[])old; |
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248 Object[] aNew = new Object[aOld.length+1]; |
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249 System.arraycopy(aOld,0,aNew,0,aOld.length); |
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250 aNew[aOld.length] = value; |
413 | 251 map.put(name,aNew); |
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252 } else { |
413 | 253 map.put(name,new Object[]{old,value}); |
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254 } |
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255 } |
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256 tbl.put( "parameters", parameters ); |
413 | 257 tbl.put( "get_parameter_values", new LuanFunction() { |
258 @Override public Object call(LuanState luan,Object[] args) throws LuanException { | |
259 return args.length==0 ? null : map.get(args[0]); | |
260 } | |
261 } ); | |
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262 } catch(IOException e) { |
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263 throw new RuntimeException(e); |
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264 } catch(ServletException e) { |
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265 throw new RuntimeException(e); |
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266 } |
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267 } |
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268 |
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269 return tbl; |
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270 } |
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271 |
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272 private LuanTable responseTable() throws NoSuchMethodException { |
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273 LuanTable tbl = LuanPropertyMeta.INSTANCE.newTable(); |
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274 LuanTable getters = LuanPropertyMeta.INSTANCE.getters(tbl); |
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275 LuanTable setters = LuanPropertyMeta.INSTANCE.setters(tbl); |
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276 tbl.put("java",response); |
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277 add( tbl, "send_redirect", String.class ); |
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278 add( tbl, "send_error", Integer.TYPE, String.class ); |
405 | 279 LuanTable headers = new NameMeta() { |
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280 |
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281 @Override Object get(String name) { |
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282 return response.getHeader(name); |
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283 } |
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284 |
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285 @Override protected Iterator keys(LuanTable tbl) { |
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286 return response.getHeaderNames().iterator(); |
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287 } |
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288 |
405 | 289 @Override public boolean canNewindex() { |
290 return true; | |
291 } | |
292 | |
293 @Override public void __newindex(LuanState luan,LuanTable tbl,Object key,Object val) { | |
223
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294 if( !(key instanceof String) ) |
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295 throw new IllegalArgumentException("key must be string for headers table"); |
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296 String name = (String)key; |
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297 if( val instanceof String ) { |
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298 response.setHeader(name,(String)val); |
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299 return; |
223
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300 } |
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301 Integer i = Luan.asInteger(val); |
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302 if( i != null ) { |
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303 response.setIntHeader(name,i); |
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304 return; |
223
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305 } |
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306 throw new IllegalArgumentException("value must be string or integer for headers table"); |
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307 } |
405 | 308 /* |
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309 @Override protected String type() { |
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310 return "response.headers-table"; |
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311 } |
405 | 312 */ |
313 }.newTable(); | |
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314 tbl.put( "headers", headers ); |
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315 getters.put( "content_type", new LuanJavaFunction( |
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316 HttpServletResponse.class.getMethod( "getContentType" ), response |
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317 ) ); |
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318 setters.put( "content_type", new LuanJavaFunction( |
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319 HttpServletResponse.class.getMethod( "setContentType", String.class ), response |
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320 ) ); |
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321 getters.put( "character_encoding", new LuanJavaFunction( |
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322 HttpServletResponse.class.getMethod( "getCharacterEncoding" ), response |
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323 ) ); |
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324 setters.put( "character_encoding", new LuanJavaFunction( |
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325 HttpServletResponse.class.getMethod( "setCharacterEncoding", String.class ), response |
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326 ) ); |
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327 add( tbl, "text_writer" ); |
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328 add( tbl, "set_cookie", String.class, String.class, Boolean.TYPE, String.class ); |
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329 add( tbl, "remove_cookie", String.class, String.class ); |
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330 getters.put( "status", new LuanJavaFunction( |
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331 HttpServletResponse.class.getMethod( "getStatus" ), response |
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332 ) ); |
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333 setters.put( "status", new LuanJavaFunction( |
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334 HttpServletResponse.class.getMethod( "setStatus", Integer.TYPE ), response |
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335 ) ); |
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336 return tbl; |
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337 } |
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338 |
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339 private LuanTable sessionTable() throws NoSuchMethodException { |
411
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340 LuanTable tbl = new LuanTable(); |
405 | 341 LuanTable attributes = new NameMeta() { |
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342 |
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343 @Override Object get(String name) { |
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344 return request.getSession().getAttribute(name); |
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345 } |
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346 |
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347 @Override protected Iterator keys(LuanTable tbl) { |
413 | 348 return new EnumerationIterator(request.getSession().getAttributeNames()); |
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349 } |
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350 |
405 | 351 @Override public boolean canNewindex() { |
352 return true; | |
353 } | |
354 | |
355 @Override public void __newindex(LuanState luan,LuanTable tbl,Object key,Object val) { | |
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356 if( !(key instanceof String) ) |
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357 throw new IllegalArgumentException("key must be string for session attributes table"); |
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358 String name = (String)key; |
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359 request.getSession().setAttribute(name,val); |
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360 } |
405 | 361 /* |
222
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362 @Override protected String type() { |
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363 return "session.attributes-table"; |
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364 } |
405 | 365 */ |
366 }.newTable(); | |
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367 tbl.put( "attributes", attributes ); |
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368 return tbl; |
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369 } |
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370 |
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371 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException { |
251
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372 t.put( method, new LuanJavaFunction(HttpServicer.class.getMethod(method,parameterTypes),this) ); |
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373 } |
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374 /* |
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375 public void text_write(LuanState luan,Object... args) throws LuanException, IOException { |
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376 if( writer == null ) |
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377 writer = response.getWriter(); |
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378 for( Object obj : args ) { |
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379 writer.print( luan.toString(obj) ); |
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380 } |
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381 } |
138
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382 */ |
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383 public LuanTable text_writer() throws IOException { |
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384 return IoLuan.textWriter(response.getWriter()); |
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385 } |
136
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386 |
413 | 387 public Object[] get_parameter_values(String name) { |
388 return request.getParameterValues(name); | |
389 } | |
390 | |
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391 public void send_redirect(String redirectUrl) |
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392 throws IOException |
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393 { |
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394 response.sendRedirect(redirectUrl); |
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395 throw new LuanExitException(); |
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396 } |
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397 |
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398 public void send_error(int code,String text) |
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399 throws IOException |
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400 { |
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401 response.sendError(code, text); |
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402 throw new LuanExitException(); |
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403 } |
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404 |
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405 public void set_cookie(String name,String value,boolean isPersistent, String domain) { |
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406 setCookie(request,response,name,value,isPersistent,domain); |
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407 } |
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408 |
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409 public void remove_cookie(String name, String domain) { |
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410 removeCookie(request,response,name,domain); |
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411 } |
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412 |
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413 |
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414 // static utils |
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415 |
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416 public String getQueryString() { |
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417 return getQueryString(request); |
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418 } |
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419 |
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420 public static String getQueryString(HttpServletRequest request) { |
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421 return getQueryString(request,0); |
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422 } |
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423 |
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424 public static String getQueryString(HttpServletRequest request,int maxValueLen) { |
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425 String method = request.getMethod(); |
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426 if( method.equals("GET") ) |
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427 return request.getQueryString(); |
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428 if( !method.equals("POST") && !method.equals("HEAD") ) |
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429 throw new RuntimeException(method); |
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430 Enumeration en = request.getParameterNames(); |
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431 StringBuilder queryBuf = new StringBuilder(); |
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432 if( !en.hasMoreElements() ) |
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433 return null; |
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434 do { |
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435 String param = (String)en.nextElement(); |
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436 String value = request.getParameter(param); |
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437 if( maxValueLen > 0 ) { |
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438 int len = value.length(); |
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439 if( len > maxValueLen ) |
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440 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen); |
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441 } |
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442 queryBuf.append(param); |
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443 queryBuf.append('='); |
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444 queryBuf.append(value); |
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445 queryBuf.append('&'); |
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446 } while( en.hasMoreElements() ); |
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447 queryBuf.deleteCharAt(queryBuf.length() - 1); |
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448 return queryBuf.toString(); |
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449 } |
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450 |
407
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451 public String getURL() { |
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452 return getURL(request); |
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453 } |
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454 |
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455 public static String getURL(HttpServletRequest request) { |
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456 return getURL(request,0); |
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457 } |
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458 |
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459 public static String getURL(HttpServletRequest request,int maxValueLen) { |
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460 // StringBuffer buf = HttpUtils.getRequestURL(request); |
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461 StringBuffer buf = request.getRequestURL(); |
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462 String qStr = getQueryString(request,maxValueLen); |
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463 if(qStr != null && qStr.length() > 0) { |
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464 buf.append('?'); |
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465 buf.append(qStr); |
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466 } |
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467 return buf.toString(); |
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468 } |
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469 |
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470 private static String escape(String value) { |
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471 return value.replaceAll(";", "%3B"); |
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472 } |
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473 |
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474 private static String unescape(String value) { |
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475 return value.replaceAll("%3B", ";"); |
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476 } |
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477 |
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478 private static Cookie getCookie(HttpServletRequest request,String name) { |
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479 Cookie[] cookies = request.getCookies(); |
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480 if( cookies == null ) |
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481 return null; |
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482 for (Cookie cookie : cookies) { |
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483 if (cookie.getName().equals(name)) |
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484 return cookie; |
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485 } |
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486 return null; |
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487 } |
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488 |
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489 public static String getCookieValue(HttpServletRequest request,String name) { |
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490 Cookie cookie = getCookie(request,name); |
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491 return cookie==null ? null : unescape(cookie.getValue()); |
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492 } |
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493 |
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494 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) { |
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495 Cookie cookie = getCookie(request,name); |
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496 if( cookie==null || !cookie.getValue().equals(value) ) { |
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497 cookie = new Cookie(name, escape(value)); |
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498 cookie.setPath("/"); |
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499 if (domain != null && domain.length() > 0) |
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500 cookie.setDomain(domain); |
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501 if( isPersistent ) |
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502 cookie.setMaxAge(10000000); |
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503 response.addCookie(cookie); |
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504 } |
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505 } |
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506 |
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507 public static void removeCookie(HttpServletRequest request, |
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508 HttpServletResponse response, |
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509 String name, |
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510 String domain |
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511 ) { |
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512 Cookie cookie = getCookie(request, name); |
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513 if(cookie != null) { |
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514 Cookie delCookie = new Cookie(name, "delete"); |
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515 delCookie.setPath("/"); |
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516 delCookie.setMaxAge(0); |
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517 if (domain != null && domain.length() > 0) |
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518 delCookie.setDomain(domain); |
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519 response.addCookie(delCookie); |
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520 } |
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521 } |
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522 |
222
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523 |
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524 |
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525 // util classes |
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526 |
413 | 527 static final class EnumerationIterator implements Iterator { |
528 private final Enumeration en; | |
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529 |
413 | 530 EnumerationIterator(Enumeration en) { |
222
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531 this.en = en; |
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532 } |
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533 |
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534 @Override public boolean hasNext() { |
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535 return en.hasMoreElements(); |
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536 } |
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537 |
413 | 538 @Override public Object next() { |
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539 return en.nextElement(); |
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540 } |
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541 |
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542 @Override public void remove() { |
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543 throw new UnsupportedOperationException(); |
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544 } |
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545 } |
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546 |
405 | 547 private static abstract class NameMeta extends LuanMeta { |
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548 abstract Object get(String name); |
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549 |
405 | 550 @Override public Object __index(LuanState luan,LuanTable tbl,Object key) { |
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551 if( !(key instanceof String) ) |
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552 return null; |
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553 String name = (String)key; |
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554 return get(name); |
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555 } |
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556 |
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557 }; |
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558 |
226
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559 private static String string(Object value) { |
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560 if( !(value instanceof String) ) |
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561 throw new IllegalArgumentException("value must be string"); |
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562 return (String)value; |
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563 } |
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564 } |