Mercurial Hosting > luan
annotate web/src/luan/modules/web/HttpServicer.java @ 362:9dbf3433f70f
remove Http.request.get_parameter_values and Http.request.parts;
multiple parameter values are now directly returned from indexing Http.request.parameters;
multipart values are now in parameters;
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 15 Apr 2015 20:33:47 -0600 |
parents | 0581238084ad |
children | a8d03e6882c6 |
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1 package luan.modules.web; |
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2 |
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3 import java.io.InputStream; |
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4 import java.io.BufferedInputStream; |
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5 import java.io.PrintWriter; |
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6 import java.io.IOException; |
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7 import java.util.Map; |
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8 import java.util.AbstractMap; |
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9 import java.util.Set; |
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10 import java.util.List; |
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11 import java.util.ArrayList; |
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12 import java.util.Arrays; |
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13 import java.util.Iterator; |
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14 import java.util.Enumeration; |
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15 import javax.servlet.ServletOutputStream; |
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16 import javax.servlet.ServletException; |
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17 import javax.servlet.http.Cookie; |
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18 import javax.servlet.http.HttpServletRequest; |
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19 import javax.servlet.http.HttpServletResponse; |
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20 import javax.servlet.http.HttpSession; |
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21 import javax.servlet.http.Part; |
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22 import org.eclipse.jetty.util.MultiPartInputStream; |
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23 import luan.Luan; |
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24 import luan.LuanState; |
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25 import luan.LuanFunction; |
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26 import luan.LuanElement; |
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27 import luan.LuanException; |
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28 import luan.LuanTable; |
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29 import luan.AbstractLuanTable; |
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30 import luan.LuanJavaFunction; |
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31 import luan.LuanExitException; |
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32 import luan.LuanProperty; |
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33 import luan.DeepCloner; |
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34 import luan.modules.PackageLuan; |
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35 import luan.modules.IoLuan; |
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36 import luan.modules.TableLuan; |
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37 import luan.modules.Utils; |
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38 |
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39 |
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40 public final class HttpServicer { |
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41 |
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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 } |
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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; |
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113 // private ServletOutputStream sos = null; |
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114 |
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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 |
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120 private LuanTable requestTable() throws NoSuchMethodException { |
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121 LuanTable tbl = Luan.newPropertyTable(); |
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122 tbl.put("java",request); |
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123 LuanTable parameters = new NameTable() { |
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124 |
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125 @Override Object get(String name) { |
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126 String[] a = request.getParameterValues(name); |
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127 return a==null ? null : a.length==1 ? a[0] : a; |
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128 } |
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129 |
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130 @Override Iterator<String> names() { |
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131 return new EnumerationIterator<String>(request.getParameterNames()); |
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132 } |
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133 |
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134 @Override protected String type() { |
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135 return "request.parameters-table"; |
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136 } |
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137 }; |
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138 tbl.put( "parameters", parameters ); |
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139 LuanTable headers = new NameTable() { |
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140 |
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141 @Override Object get(String name) { |
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142 return request.getHeader(name); |
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143 } |
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144 |
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145 @Override Iterator<String> names() { |
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146 return new EnumerationIterator<String>(request.getHeaderNames()); |
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147 } |
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148 |
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149 @Override protected String type() { |
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150 return "request.headers-table"; |
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151 } |
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152 }; |
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153 tbl.put( "headers", headers ); |
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154 tbl.put( "method", new LuanProperty() { public Object get() { |
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155 return request.getMethod(); |
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156 } } ); |
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157 /* |
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158 tbl.put( "servlet_path", new LuanProperty() { public Object get() { |
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159 return request.getServletPath(); |
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160 } } ); |
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161 */ |
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162 tbl.put( "path", new LuanProperty() { public Object get() { |
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163 return request.getRequestURI(); |
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164 } } ); |
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165 tbl.put( "server_name", new LuanProperty() { public Object get() { |
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166 return request.getServerName(); |
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167 } } ); |
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168 tbl.put( "url", new LuanProperty() { public Object get() { |
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169 return getURL(request); |
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170 } } ); |
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171 tbl.put( "query_string", new LuanProperty() { public Object get() { |
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172 return getQueryString(request); |
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173 } } ); |
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174 tbl.put( "remote_address", new LuanProperty() { public Object get() { |
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175 return request.getRemoteAddr(); |
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176 } } ); |
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177 LuanTable cookies = new AbstractLuanTable() { |
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178 |
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179 @Override public final Object get(Object key) { |
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180 if( !(key instanceof String) ) |
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181 return null; |
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182 String name = (String)key; |
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183 return getCookieValue(request,name); |
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184 } |
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185 |
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186 @Override public final Iterator<Map.Entry<Object,Object>> iterator() { |
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187 return new Iterator<Map.Entry<Object,Object>>() { |
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188 final Cookie[] cookies = request.getCookies(); |
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189 int i = 0; |
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190 |
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191 @Override public boolean hasNext() { |
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192 return i < cookies.length; |
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193 } |
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194 @Override public Map.Entry<Object,Object> next() { |
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195 Cookie cookie = cookies[i++]; |
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196 String name = cookie.getName(); |
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197 Object val = unescape(cookie.getValue()); |
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198 return new AbstractMap.SimpleEntry<Object,Object>(name,val); |
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199 } |
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200 @Override public void remove() { |
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201 throw new UnsupportedOperationException(); |
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202 } |
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203 }; |
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204 } |
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205 |
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206 @Override protected String type() { |
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207 return "request.cookies-table"; |
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208 } |
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209 }; |
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210 tbl.put( "cookies", cookies ); |
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211 |
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212 String contentType = request.getContentType(); |
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213 if( contentType!=null && contentType.startsWith("multipart/form-data") ) { |
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214 try { |
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215 InputStream in = new BufferedInputStream(request.getInputStream()); |
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216 final MultiPartInputStream mpis = new MultiPartInputStream(in,contentType,null,null); |
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217 mpis.setDeleteOnExit(true); |
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218 parameters = Luan.newTable(); |
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219 for( Part p : mpis.getParts() ) { |
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220 final MultiPartInputStream.MultiPart part = (MultiPartInputStream.MultiPart)p; |
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221 String name = part.getName(); |
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222 Object value; |
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223 String filename = part.getContentDispositionFilename(); |
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224 if( filename == null ) { |
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225 value = new String(part.getBytes()); |
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226 } else { |
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227 LuanTable partTbl = Luan.newPropertyTable(); |
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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 partTbl.put( "content", new LuanProperty() { public Object get() { |
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231 try { |
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232 InputStream in = part.getInputStream(); |
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233 byte[] content = Utils.readAll(in); |
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234 in.close(); |
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235 return content; |
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236 } catch(IOException e) { |
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237 throw new RuntimeException(e); |
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238 } |
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239 } } ); |
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240 value = partTbl; |
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241 } |
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242 Object old = parameters.get(name); |
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243 if( old == null ) { |
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244 parameters.put(name,value); |
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245 } else if( old instanceof Object[] ) { |
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246 Object[] aOld = (Object[])old; |
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247 Object[] aNew = new Object[aOld.length+1]; |
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248 System.arraycopy(aOld,0,aNew,0,aOld.length); |
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249 aNew[aOld.length] = value; |
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250 parameters.put(name,aNew); |
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251 } else { |
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252 parameters.put(name,new Object[]{old,value}); |
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253 } |
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254 } |
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255 tbl.put( "parameters", parameters ); |
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256 } catch(IOException e) { |
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257 throw new RuntimeException(e); |
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258 } catch(ServletException e) { |
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259 throw new RuntimeException(e); |
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260 } |
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261 } |
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262 |
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263 return tbl; |
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264 } |
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265 |
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266 private LuanTable responseTable() throws NoSuchMethodException { |
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267 LuanTable tbl = Luan.newPropertyTable(); |
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268 tbl.put("java",response); |
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269 add( tbl, "send_redirect", String.class ); |
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270 add( tbl, "send_error", Integer.TYPE, String.class ); |
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271 LuanTable headers = new NameTable() { |
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272 |
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273 @Override Object get(String name) { |
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274 return response.getHeader(name); |
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275 } |
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276 |
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277 @Override Iterator<String> names() { |
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278 return response.getHeaderNames().iterator(); |
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279 } |
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280 |
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281 @Override public void put(Object key,Object val) { |
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282 if( !(key instanceof String) ) |
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283 throw new IllegalArgumentException("key must be string for headers table"); |
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284 String name = (String)key; |
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285 if( val instanceof String ) { |
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286 response.setHeader(name,(String)val); |
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287 return; |
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288 } |
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289 Integer i = Luan.asInteger(val); |
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290 if( i != null ) { |
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291 response.setIntHeader(name,i); |
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292 return; |
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293 } |
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294 throw new IllegalArgumentException("value must be string or integer for headers table"); |
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295 } |
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296 |
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297 @Override protected String type() { |
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298 return "response.headers-table"; |
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299 } |
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300 }; |
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301 tbl.put( "headers", headers ); |
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302 tbl.put( "content_type", new LuanProperty() { |
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303 @Override public Object get() { |
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304 return response.getContentType(); |
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305 } |
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306 @Override public boolean set(Object value) { |
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307 response.setContentType(string(value)); return true; |
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308 } |
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309 } ); |
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310 tbl.put( "character_encoding", new LuanProperty() { |
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311 @Override public Object get() { |
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312 return response.getCharacterEncoding(); |
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313 } |
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314 @Override public boolean set(Object value) { |
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315 response.setCharacterEncoding(string(value)); return true; |
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316 } |
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317 } ); |
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318 add( tbl, "text_writer" ); |
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319 add( tbl, "set_cookie", String.class, String.class, Boolean.TYPE, String.class ); |
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320 add( tbl, "remove_cookie", String.class, String.class ); |
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321 return tbl; |
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322 } |
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323 |
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324 private LuanTable sessionTable() throws NoSuchMethodException { |
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325 LuanTable tbl = Luan.newTable(); |
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326 LuanTable attributes = new NameTable() { |
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327 |
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328 @Override Object get(String name) { |
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329 return request.getSession().getAttribute(name); |
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330 } |
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331 |
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332 @Override Iterator<String> names() { |
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333 return new EnumerationIterator<String>(request.getSession().getAttributeNames()); |
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334 } |
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335 |
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336 @Override public void put(Object key,Object val) { |
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337 if( !(key instanceof String) ) |
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338 throw new IllegalArgumentException("key must be string for session attributes table"); |
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339 String name = (String)key; |
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340 request.getSession().setAttribute(name,val); |
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341 } |
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342 |
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343 @Override protected String type() { |
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344 return "session.attributes-table"; |
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345 } |
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346 }; |
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347 tbl.put( "attributes", attributes ); |
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348 return tbl; |
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349 } |
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350 |
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351 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException { |
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352 t.put( method, new LuanJavaFunction(HttpServicer.class.getMethod(method,parameterTypes),this) ); |
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353 } |
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354 /* |
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355 public void text_write(LuanState luan,Object... args) throws LuanException, IOException { |
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356 if( writer == null ) |
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357 writer = response.getWriter(); |
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358 for( Object obj : args ) { |
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359 writer.print( luan.toString(obj) ); |
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360 } |
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361 } |
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362 */ |
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363 public LuanTable text_writer() throws IOException { |
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364 return IoLuan.textWriter(response.getWriter()); |
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365 } |
136
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366 |
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367 public void send_redirect(String redirectUrl) |
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368 throws IOException |
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369 { |
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370 response.sendRedirect(redirectUrl); |
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371 throw new LuanExitException(); |
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372 } |
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373 |
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374 public void send_error(int code,String text) |
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375 throws IOException |
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376 { |
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377 response.sendError(code, text); |
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378 throw new LuanExitException(); |
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379 } |
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380 |
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381 public void set_cookie(String name,String value,boolean isPersistent, String domain) { |
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382 setCookie(request,response,name,value,isPersistent,domain); |
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383 } |
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384 |
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385 public void remove_cookie(String name, String domain) { |
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386 removeCookie(request,response,name,domain); |
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387 } |
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388 |
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389 |
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390 // static utils |
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391 |
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392 public static String getQueryString(HttpServletRequest request) { |
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393 return getQueryString(request,0); |
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394 } |
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395 |
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396 public static String getQueryString(HttpServletRequest request,int maxValueLen) { |
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397 String method = request.getMethod(); |
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398 if( method.equals("GET") ) |
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399 return request.getQueryString(); |
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400 if( !method.equals("POST") && !method.equals("HEAD") ) |
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401 throw new RuntimeException(method); |
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402 Enumeration en = request.getParameterNames(); |
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403 StringBuilder queryBuf = new StringBuilder(); |
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404 if( !en.hasMoreElements() ) |
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405 return null; |
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406 do { |
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407 String param = (String)en.nextElement(); |
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408 String value = request.getParameter(param); |
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409 if( maxValueLen > 0 ) { |
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410 int len = value.length(); |
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411 if( len > maxValueLen ) |
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412 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen); |
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413 } |
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414 queryBuf.append(param); |
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415 queryBuf.append('='); |
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416 queryBuf.append(value); |
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417 queryBuf.append('&'); |
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418 } while( en.hasMoreElements() ); |
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419 queryBuf.deleteCharAt(queryBuf.length() - 1); |
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420 return queryBuf.toString(); |
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421 } |
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422 |
313
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423 public static String getURL(HttpServletRequest request) { |
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424 return getURL(request,0); |
89
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425 } |
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426 |
313
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427 public static String getURL(HttpServletRequest request,int maxValueLen) { |
89
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428 // StringBuffer buf = HttpUtils.getRequestURL(request); |
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429 StringBuffer buf = request.getRequestURL(); |
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430 String qStr = getQueryString(request,maxValueLen); |
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431 if(qStr != null && qStr.length() > 0) { |
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432 buf.append('?'); |
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433 buf.append(qStr); |
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434 } |
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435 return buf.toString(); |
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436 } |
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437 |
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438 private static String escape(String value) { |
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439 return value.replaceAll(";", "%3B"); |
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440 } |
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441 |
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442 private static String unescape(String value) { |
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443 return value.replaceAll("%3B", ";"); |
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444 } |
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445 |
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446 private static Cookie getCookie(HttpServletRequest request,String name) { |
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447 Cookie[] cookies = request.getCookies(); |
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448 if( cookies == null ) |
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449 return null; |
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450 for (Cookie cookie : cookies) { |
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451 if (cookie.getName().equals(name)) |
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452 return cookie; |
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453 } |
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454 return null; |
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455 } |
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456 |
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457 public static String getCookieValue(HttpServletRequest request,String name) { |
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458 Cookie cookie = getCookie(request,name); |
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459 return cookie==null ? null : unescape(cookie.getValue()); |
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460 } |
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461 |
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462 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) { |
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463 Cookie cookie = getCookie(request,name); |
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464 if( cookie==null || !cookie.getValue().equals(value) ) { |
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465 cookie = new Cookie(name, escape(value)); |
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466 cookie.setPath("/"); |
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467 if (domain != null && domain.length() > 0) |
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468 cookie.setDomain(domain); |
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469 if( isPersistent ) |
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470 cookie.setMaxAge(10000000); |
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471 response.addCookie(cookie); |
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472 } |
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473 } |
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474 |
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475 public static void removeCookie(HttpServletRequest request, |
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476 HttpServletResponse response, |
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477 String name, |
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478 String domain |
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479 ) { |
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480 Cookie cookie = getCookie(request, name); |
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481 if(cookie != null) { |
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482 Cookie delCookie = new Cookie(name, "delete"); |
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483 delCookie.setPath("/"); |
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484 delCookie.setMaxAge(0); |
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485 if (domain != null && domain.length() > 0) |
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486 delCookie.setDomain(domain); |
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487 response.addCookie(delCookie); |
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488 } |
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489 } |
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490 |
222
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491 |
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492 |
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493 // util classes |
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494 |
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495 static final class EnumerationIterator<E> implements Iterator<E> { |
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496 private final Enumeration<E> en; |
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497 |
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498 EnumerationIterator(Enumeration<E> en) { |
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499 this.en = en; |
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500 } |
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501 |
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502 @Override public boolean hasNext() { |
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503 return en.hasMoreElements(); |
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504 } |
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505 |
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506 @Override public E next() { |
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507 return en.nextElement(); |
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508 } |
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509 |
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510 @Override public void remove() { |
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511 throw new UnsupportedOperationException(); |
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512 } |
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513 } |
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514 |
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515 private static abstract class NameTable extends AbstractLuanTable { |
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516 abstract Object get(String name); |
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517 abstract Iterator<String> names(); |
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518 |
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519 @Override public final Object get(Object key) { |
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520 if( !(key instanceof String) ) |
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521 return null; |
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522 String name = (String)key; |
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523 return get(name); |
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524 } |
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525 |
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526 @Override public final Iterator<Map.Entry<Object,Object>> iterator() { |
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527 return new Iterator<Map.Entry<Object,Object>>() { |
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528 Iterator<String> names = names(); |
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529 |
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530 @Override public boolean hasNext() { |
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531 return names.hasNext(); |
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532 } |
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533 @Override public Map.Entry<Object,Object> next() { |
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534 String name = names.next(); |
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535 Object val = get(name); |
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536 return new AbstractMap.SimpleEntry<Object,Object>(name,val); |
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537 } |
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538 @Override public void remove() { |
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539 throw new UnsupportedOperationException(); |
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540 } |
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541 }; |
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542 } |
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543 }; |
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544 |
226
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545 private static String string(Object value) { |
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546 if( !(value instanceof String) ) |
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547 throw new IllegalArgumentException("value must be string"); |
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548 return (String)value; |
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549 } |
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550 } |