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annotate src/luan/lib/HttpLib.java @ 89:8ef2d6701541

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improve HttpLib git-svn-id: https://luan-java.googlecode.com/svn/trunk@90 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 28 Feb 2013 09:47:38 +0000
parents 6ca02b188dba
children b1e87f1bcc13
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1 package luan.lib;
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3 import java.io.PrintStream;
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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 luan.LuanState;
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14 import luan.LuanFunction;
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15 import luan.LuanElement;
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16 import luan.LuanException;
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17 import luan.LuanTable;
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18 import luan.LuanJavaFunction;
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19 import luan.LuanExitException;
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22 public final class HttpLib {
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24 public static final String NAME = "http";
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25 public static final String FN_NAME = "http.server";
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27 public static void load(LuanState luan) throws LuanException {
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28 PackageLib.require(luan,NAME);
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29 Object fn = luan.get(HttpLib.FN_NAME);
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30 if( !(fn instanceof LuanFunction) )
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31 throw luan.JAVA.exception( "function '"+HttpLib.FN_NAME+"' not defined" );
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32 }
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34 public static void service(LuanState luan,HttpServletRequest request,HttpServletResponse response)
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35 throws LuanException, IOException
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36 {
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37 LuanFunction fn = (LuanFunction)luan.get(FN_NAME);
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38 ServletOutputStream sout = response.getOutputStream();
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39 luan.out = new PrintStream(sout);
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41 LuanTable module = (LuanTable)luan.loaded().get(NAME);
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43 try {
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44 new HttpLib(request,response,module);
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45 } catch(NoSuchMethodException e) {
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46 throw new RuntimeException(e);
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47 }
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49 luan.JAVA.call(fn,FN_NAME);
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50 }
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52 private final HttpServletRequest request;
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53 private final HttpServletResponse response;
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55 private HttpLib(HttpServletRequest request,HttpServletResponse response,LuanTable module) throws NoSuchMethodException {
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56 this.request = request;
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57 this.response = response;
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59 LuanTable req = new LuanTable();
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60 module.put("request",req);
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61 LuanTable resp = new LuanTable();
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62 module.put("response",resp);
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64 req.put( "get_parameter", new LuanJavaFunction(HttpServletRequest.class.getMethod("getParameter",String.class),request) );
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65 req.put( "get_parameter_values", new LuanJavaFunction(HttpServletRequest.class.getMethod("getParameterValues",String.class),request) );
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66 req.put( "get_header", new LuanJavaFunction(HttpServletRequest.class.getMethod("getHeader",String.class),request) );
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67 add( req, "get_cookie_value", String.class );
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68 req.put( "method", new LuanJavaFunction(HttpServletRequest.class.getMethod("getMethod"),request) );
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69 req.put( "servlet_path", new LuanJavaFunction(HttpServletRequest.class.getMethod("getServletPath"),request) );
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70 req.put( "server_name", new LuanJavaFunction(HttpServletRequest.class.getMethod("getServerName"),request) );
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71 add( req, "current_url" );
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72 req.put( "remote_address", new LuanJavaFunction(HttpServletRequest.class.getMethod("getRemoteAddr"),request) );
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74 add( resp, "send_redirect", String.class );
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75 add( resp, "send_error", Integer.TYPE, String.class );
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76 resp.put( "set_header", new LuanJavaFunction(HttpServletResponse.class.getMethod("setHeader",String.class,String.class),response) );
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77 add( resp, "set_cookie", String.class, String.class, Boolean.TYPE, String.class );
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78 add( resp, "remove_cookie", String.class, String.class );
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79 }
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81 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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82 t.put( method, new LuanJavaFunction(HttpLib.class.getMethod(method,parameterTypes),this) );
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83 }
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85 public String get_cookie_value(String name) {
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86 return getCookieValue(request, name);
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87 }
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88
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89 public String current_url() {
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90 return getCurrentURL(request);
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91 }
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93 public void send_redirect(String redirectUrl)
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94 throws IOException
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95 {
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96 response.sendRedirect(redirectUrl);
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97 throw new LuanExitException();
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98 }
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99
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100 public void send_error(int code,String text)
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101 throws IOException
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102 {
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103 response.sendError(code, text);
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104 throw new LuanExitException();
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105 }
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106
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107 public void set_cookie(String name,String value,boolean isPersistent, String domain) {
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108 setCookie(request,response,name,value,isPersistent,domain);
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109 }
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110
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111 public void remove_cookie(String name, String domain) {
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112 removeCookie(request,response,name,domain);
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113 }
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114
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115
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116 // static utils
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117
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118 public static String getQueryString(HttpServletRequest request) {
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119 return getQueryString(request,0);
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120 }
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121
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122 public static String getQueryString(HttpServletRequest request,int maxValueLen) {
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123 String method = request.getMethod();
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124 if( method.equals("GET") )
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125 return request.getQueryString();
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126 if( !method.equals("POST") && !method.equals("HEAD") )
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127 throw new RuntimeException(method);
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128 Enumeration en = request.getParameterNames();
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129 StringBuilder queryBuf = new StringBuilder();
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130 if( !en.hasMoreElements() )
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131 return null;
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132 do {
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133 String param = (String)en.nextElement();
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134 String value = request.getParameter(param);
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135 if( maxValueLen > 0 ) {
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136 int len = value.length();
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137 if( len > maxValueLen )
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138 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen);
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139 }
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140 queryBuf.append(param);
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141 queryBuf.append('=');
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142 queryBuf.append(value);
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143 queryBuf.append('&');
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144 } while( en.hasMoreElements() );
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145 queryBuf.deleteCharAt(queryBuf.length() - 1);
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146 return queryBuf.toString();
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147 }
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148
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149 public static String getCurrentURL(HttpServletRequest request) {
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150 return getCurrentURL(request,0);
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151 }
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152
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153 public static String getCurrentURL(HttpServletRequest request,int maxValueLen) {
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154 // StringBuffer buf = HttpUtils.getRequestURL(request);
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155 StringBuffer buf = request.getRequestURL();
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156 String qStr = getQueryString(request,maxValueLen);
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157 if(qStr != null && qStr.length() > 0) {
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158 buf.append('?');
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159 buf.append(qStr);
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160 }
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161 return buf.toString();
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162 }
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163
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164 private static String escape(String value) {
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165 return value.replaceAll(";", "%3B");
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166 }
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167
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168 private static String unescape(String value) {
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169 return value.replaceAll("%3B", ";");
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170 }
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171
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172 private static Cookie getCookie(HttpServletRequest request,String name) {
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173 Cookie[] cookies = request.getCookies();
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174 if( cookies == null )
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175 return null;
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176 for (Cookie cookie : cookies) {
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177 if (cookie.getName().equals(name))
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178 return cookie;
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179 }
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180 return null;
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181 }
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182
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183 public static String getCookieValue(HttpServletRequest request,String name) {
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184 Cookie cookie = getCookie(request,name);
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185 return cookie==null ? null : unescape(cookie.getValue());
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186 }
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187
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188 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) {
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189 Cookie cookie = getCookie(request,name);
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190 if( cookie==null || !cookie.getValue().equals(value) ) {
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191 cookie = new Cookie(name, escape(value));
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192 cookie.setPath("/");
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193 if (domain != null && domain.length() > 0)
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194 cookie.setDomain(domain);
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195 if( isPersistent )
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196 cookie.setMaxAge(10000000);
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197 response.addCookie(cookie);
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198 }
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199 }
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200
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201 public static void removeCookie(HttpServletRequest request,
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202 HttpServletResponse response,
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203 String name,
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204 String domain
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205
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206 ) {
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207 Cookie cookie = getCookie(request, name);
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208 if(cookie != null) {
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parents: 88
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209 Cookie delCookie = new Cookie(name, "delete");
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210 delCookie.setPath("/");
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parents: 88
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211 delCookie.setMaxAge(0);
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parents: 88
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212 if (domain != null && domain.length() > 0)
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parents: 88
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213 delCookie.setDomain(domain);
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214 response.addCookie(delCookie);
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215 }
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216 }
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217
76
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218 }