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annotate web/src/luan/modules/web/HttpLuan.java @ 217:a608066395c5

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clean up HttpLuan.java git-svn-id: https://luan-java.googlecode.com/svn/trunk@218 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 15 Jul 2014 06:16:40 +0000
parents 75750ceb45ee
children 92f5d74697f8
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1 package luan.modules.web;
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2
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3 import java.io.PrintWriter;
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4 import java.io.IOException;
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5 import java.util.Map;
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6 import java.util.Set;
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7 import java.util.Arrays;
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8 import java.util.Enumeration;
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9 import javax.servlet.ServletOutputStream;
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10 import javax.servlet.http.Cookie;
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11 import javax.servlet.http.HttpServletRequest;
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12 import javax.servlet.http.HttpServletResponse;
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13 import javax.servlet.http.HttpSession;
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14 import luan.Luan;
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15 import luan.LuanState;
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16 import luan.LuanFunction;
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17 import luan.LuanElement;
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18 import luan.LuanException;
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19 import luan.LuanTable;
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20 import luan.LuanJavaFunction;
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21 import luan.LuanExitException;
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22 import luan.DeepCloner;
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23 import luan.modules.PackageLuan;
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24 import luan.modules.IoLuan;
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27 public final class HttpLuan {
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29 public static final LuanFunction LOADER = new LuanFunction() {
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30 @Override public Object call(LuanState luan,Object[] args) {
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31 LuanTable module = new LuanTable();
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32 try {
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33 addStatic( module, "new_luan_handler", LuanState.class );
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34 } catch(NoSuchMethodException e) {
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35 throw new RuntimeException(e);
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36 }
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37 return module;
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38 }
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39 };
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40
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41 private static void addStatic(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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42 t.put( method, new LuanJavaFunction(HttpLuan.class.getMethod(method,parameterTypes),null) );
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43 }
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45 public static LuanHandler new_luan_handler(LuanState luan) {
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46 return new LuanHandler(luan);
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47 }
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49 public static boolean service(LuanState luan,HttpServletRequest request,HttpServletResponse response,String modName)
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50 throws LuanException
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51 {
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52 LuanFunction fn;
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53 synchronized(luan) {
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54 Object mod = PackageLuan.load(luan,modName);
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55 if( mod==null )
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56 return false;
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57 if( !(mod instanceof LuanTable) )
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58 throw luan.exception( "module '"+modName+"' must return a table" );
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59 LuanTable tbl = (LuanTable)mod;
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60 if( Luan.toBoolean( tbl.get("per_session") ) ) {
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61 HttpSession session = request.getSession();
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62 LuanState sessionLuan = (LuanState)session.getValue("luan");
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63 if( sessionLuan!=null ) {
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64 luan = sessionLuan;
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65 } else {
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66 DeepCloner cloner = new DeepCloner();
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67 luan = cloner.deepClone(luan);
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68 session.putValue("luan",luan);
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69 }
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70 tbl = (LuanTable)PackageLuan.require(luan,modName);
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71 fn = (LuanFunction)tbl.get("service");
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72 } else {
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73 fn = (LuanFunction)tbl.get("service");
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74 if( fn == null )
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75 throw luan.exception( "function 'service' is not defined" );
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76 DeepCloner cloner = new DeepCloner();
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77 luan = cloner.deepClone(luan);
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78 fn = cloner.get(fn);
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79 }
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80 }
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81
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82 LuanTable module = (LuanTable)PackageLuan.loaded(luan).get("web/Http");
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83 if( module == null )
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84 throw luan.exception( "module 'web/Http' not defined" );
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85 HttpLuan lib = new HttpLuan(request,response);
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86 try {
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87 module.put( "request", lib.requestTable() );
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88 module.put( "response", lib.responseTable() );
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89 module.put( "cookie", lib.cookieTable() );
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90 module.put( "session_attribute", lib.sessionTable() );
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91 /*
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92 module.put( "write", new LuanJavaFunction(
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93 HttpLuan.class.getMethod( "text_write", LuanState.class, new Object[0].getClass() ), lib
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94 ) );
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95 */
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96 } catch(NoSuchMethodException e) {
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97 throw new RuntimeException(e);
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98 }
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99
138
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100 luan.call(fn,"<http>");
175
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101 return true;
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102 }
89
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103
136
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104
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105
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106 private final HttpServletRequest request;
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107 private final HttpServletResponse response;
138
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108 // private PrintWriter writer = null;
136
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109 // private ServletOutputStream sos = null;
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110
168
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111 private HttpLuan(HttpServletRequest request,HttpServletResponse response) {
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112 this.request = request;
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113 this.response = response;
136
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114 }
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115
136
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116 private LuanTable requestTable() throws NoSuchMethodException {
217
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117 LuanTable tbl = new LuanTable();
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118 tbl.put("java",request);
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119 add( tbl, "get_parameter", String.class );
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120 tbl.put( "get_header", new LuanJavaFunction(
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121 HttpServletRequest.class.getMethod("getHeader",String.class), request
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122 ) );
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123 tbl.put( "get_method", new LuanJavaFunction(
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124 HttpServletRequest.class.getMethod("getMethod"), request
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125 ) );
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126 tbl.put( "get_servlet_path", new LuanJavaFunction(
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127 HttpServletRequest.class.getMethod("getServletPath"), request
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128 ) );
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129 tbl.put( "get_server_name", new LuanJavaFunction(
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130 HttpServletRequest.class.getMethod("getServerName"), request
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131 ) );
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132 add( tbl, "get_current_url" );
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133 tbl.put( "get_remote_address", new LuanJavaFunction(
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134 HttpServletRequest.class.getMethod("getRemoteAddr"), request
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135 ) );
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136 return tbl;
136
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137 }
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138
136
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139 private LuanTable responseTable() throws NoSuchMethodException {
217
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140 LuanTable tbl = new LuanTable();
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141 tbl.put("java",response);
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142 add( tbl, "send_redirect", String.class );
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143 add( tbl, "send_error", Integer.TYPE, String.class );
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144 tbl.put( "contains_header", new LuanJavaFunction(
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145 HttpServletResponse.class.getMethod("containsHeader",String.class), response
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146 ) );
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147 tbl.put( "set_header", new LuanJavaFunction(
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148 HttpServletResponse.class.getMethod("setHeader",String.class,String.class), response
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149 ) );
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150 tbl.put( "set_content_type", new LuanJavaFunction(
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151 HttpServletResponse.class.getMethod("setContentType",String.class), response
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152 ) );
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153 tbl.put( "set_character_encoding", new LuanJavaFunction(
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154 HttpServletResponse.class.getMethod("setCharacterEncoding",String.class), response
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155 ) );
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156 add( tbl, "text_writer" );
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157 return tbl;
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158 }
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159
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160 private LuanTable cookieTable() throws NoSuchMethodException {
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161 LuanTable tbl = new LuanTable();
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162 tbl.put( "get", new LuanJavaFunction(
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163 HttpLuan.class.getMethod("get_cookie",String.class), this
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164 ) );
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165 tbl.put( "set", new LuanJavaFunction(
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166 HttpLuan.class.getMethod("set_cookie", String.class, String.class, Boolean.TYPE, String.class), this
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167 ) );
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168 tbl.put( "remove", new LuanJavaFunction(
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169 HttpLuan.class.getMethod("remove_cookie", String.class, String.class), this
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170 ) );
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171 return tbl;
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172 }
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173
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174 private LuanTable sessionTable() throws NoSuchMethodException {
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175 LuanTable tbl = new LuanTable();
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176 tbl.put( "get", new LuanJavaFunction(
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177 HttpLuan.class.getMethod("get_session_attribute",String.class), this
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178 ) );
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179 tbl.put( "set", new LuanJavaFunction(
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180 HttpLuan.class.getMethod("set_session_attribute",String.class, Object.class), this
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181 ) );
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182 return tbl;
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183 }
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184
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185 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
168
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186 t.put( method, new LuanJavaFunction(HttpLuan.class.getMethod(method,parameterTypes),this) );
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187 }
138
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188 /*
136
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189 public void text_write(LuanState luan,Object... args) throws LuanException, IOException {
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190 if( writer == null )
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191 writer = response.getWriter();
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192 for( Object obj : args ) {
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193 writer.print( luan.toString(obj) );
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194 }
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195 }
138
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196 */
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197 public LuanTable text_writer() throws IOException {
168
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198 return IoLuan.textWriter(response.getWriter());
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199 }
136
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200
217
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201 public Object get_parameter(String name) {
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202 String[] a = request.getParameterValues(name);
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203 return a==null ? null : a.length==1 ? a[0] : a;
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204 }
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205
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206 public String get_cookie(String name) {
89
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207 return getCookieValue(request, name);
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208 }
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209
217
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210 public String get_current_url() {
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211 return getCurrentURL(request);
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212 }
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213
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214 public void send_redirect(String redirectUrl)
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215 throws IOException
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216 {
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217 response.sendRedirect(redirectUrl);
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218 throw new LuanExitException();
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219 }
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220
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221 public void send_error(int code,String text)
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222 throws IOException
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223 {
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224 response.sendError(code, text);
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225 throw new LuanExitException();
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226 }
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227
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228 public void set_cookie(String name,String value,boolean isPersistent, String domain) {
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229 setCookie(request,response,name,value,isPersistent,domain);
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230 }
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231
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232 public void remove_cookie(String name, String domain) {
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233 removeCookie(request,response,name,domain);
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234 }
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235
139
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236 public Object get_session_attribute(String name) {
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237 return request.getSession().getAttribute(name);
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238 }
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239
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240 public void set_session_attribute(String name,Object value) {
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241 request.getSession().setAttribute(name,value);
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242 }
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243
89
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244
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245 // static utils
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246
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247 public static String getQueryString(HttpServletRequest request) {
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248 return getQueryString(request,0);
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249 }
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250
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251 public static String getQueryString(HttpServletRequest request,int maxValueLen) {
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252 String method = request.getMethod();
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253 if( method.equals("GET") )
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254 return request.getQueryString();
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255 if( !method.equals("POST") && !method.equals("HEAD") )
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256 throw new RuntimeException(method);
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257 Enumeration en = request.getParameterNames();
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258 StringBuilder queryBuf = new StringBuilder();
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259 if( !en.hasMoreElements() )
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260 return null;
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261 do {
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262 String param = (String)en.nextElement();
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263 String value = request.getParameter(param);
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264 if( maxValueLen > 0 ) {
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265 int len = value.length();
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266 if( len > maxValueLen )
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267 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen);
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268 }
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269 queryBuf.append(param);
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270 queryBuf.append('=');
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271 queryBuf.append(value);
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272 queryBuf.append('&');
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273 } while( en.hasMoreElements() );
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274 queryBuf.deleteCharAt(queryBuf.length() - 1);
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275 return queryBuf.toString();
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276 }
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277
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278 public static String getCurrentURL(HttpServletRequest request) {
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279 return getCurrentURL(request,0);
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280 }
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281
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282 public static String getCurrentURL(HttpServletRequest request,int maxValueLen) {
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283 // StringBuffer buf = HttpUtils.getRequestURL(request);
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284 StringBuffer buf = request.getRequestURL();
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285 String qStr = getQueryString(request,maxValueLen);
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286 if(qStr != null && qStr.length() > 0) {
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287 buf.append('?');
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288 buf.append(qStr);
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289 }
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290 return buf.toString();
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291 }
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292
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293 private static String escape(String value) {
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294 return value.replaceAll(";", "%3B");
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295 }
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296
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297 private static String unescape(String value) {
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298 return value.replaceAll("%3B", ";");
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299 }
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300
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301 private static Cookie getCookie(HttpServletRequest request,String name) {
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302 Cookie[] cookies = request.getCookies();
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303 if( cookies == null )
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304 return null;
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305 for (Cookie cookie : cookies) {
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306 if (cookie.getName().equals(name))
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307 return cookie;
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308 }
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309 return null;
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310 }
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311
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312 public static String getCookieValue(HttpServletRequest request,String name) {
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313 Cookie cookie = getCookie(request,name);
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314 return cookie==null ? null : unescape(cookie.getValue());
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315 }
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316
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317 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) {
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318 Cookie cookie = getCookie(request,name);
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319 if( cookie==null || !cookie.getValue().equals(value) ) {
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320 cookie = new Cookie(name, escape(value));
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321 cookie.setPath("/");
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322 if (domain != null && domain.length() > 0)
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323 cookie.setDomain(domain);
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324 if( isPersistent )
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325 cookie.setMaxAge(10000000);
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326 response.addCookie(cookie);
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327 }
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328 }
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329
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330 public static void removeCookie(HttpServletRequest request,
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331 HttpServletResponse response,
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332 String name,
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333 String domain
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334
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335 ) {
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336 Cookie cookie = getCookie(request, name);
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337 if(cookie != null) {
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338 Cookie delCookie = new Cookie(name, "delete");
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339 delCookie.setPath("/");
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340 delCookie.setMaxAge(0);
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341 if (domain != null && domain.length() > 0)
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342 delCookie.setDomain(domain);
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343 response.addCookie(delCookie);
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344 }
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345 }
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346
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347 }