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annotate src/luan/lib/HttpLib.java @ 136:7e160d2f6d9c

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update HttpLib, untested git-svn-id: https://luan-java.googlecode.com/svn/trunk@137 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Wed, 11 Jun 2014 09:33:02 +0000
parents 3119326260ea
children 06159094b802
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1 package luan.lib;
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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 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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20 import luan.DeepCloner;
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23 public final class HttpLib {
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25 public static final String NAME = "Http";
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27 public static final LuanFunction LOADER = new LuanFunction() {
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28 @Override public Object call(LuanState luan,Object[] args) {
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29 return new LuanTable(); // starts empty
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30 }
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31 };
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33 public static void service(LuanState luan,HttpServletRequest request,HttpServletResponse response,String modName)
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34 throws LuanException
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35 {
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36 LuanState newLuan;
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37 LuanFunction newFn;
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38 synchronized(luan) {
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39 Object mod = PackageLib.require(luan,modName);
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40 if( !(mod instanceof LuanFunction) )
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41 throw luan.exception( "module '"+modName+"' must return a function" );
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42 LuanFunction fn = (LuanFunction)mod;
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43 DeepCloner cloner = new DeepCloner();
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44 newLuan = cloner.deepClone(luan);
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45 newFn = cloner.get(fn);
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46 }
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48 LuanTable module = (LuanTable)luan.loaded().get(NAME);
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49 if( module == null )
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50 throw luan.exception( "module 'Http' not defined" );
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51 HttpLib lib = new HttpLib(request,response);
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52 try {
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53 module.put( "request", lib.requestTable() );
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54 module.put( "response", lib.responseTable() );
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55 module.put( "write", new LuanJavaFunction(
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56 HttpLib.class.getMethod( "text_write", LuanState.class, new Object[0].getClass() ), lib
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57 ) );
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58 } catch(NoSuchMethodException e) {
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59 throw new RuntimeException(e);
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60 }
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62 newLuan.call(newFn,"<http>");
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63 }
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67 private final HttpServletRequest request;
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68 private final HttpServletResponse response;
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69 private PrintWriter writer = null;
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70 // private ServletOutputStream sos = null;
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72 private HttpLib(HttpServletRequest request,HttpServletResponse response) {
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73 this.request = request;
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74 this.response = response;
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75 }
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77 private LuanTable requestTable() throws NoSuchMethodException {
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78 LuanTable req = new LuanTable();
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79 req.put( "get_attribute", new LuanJavaFunction(HttpServletRequest.class.getMethod("getAttribute",String.class),request) );
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80 req.put( "set_attribute", new LuanJavaFunction(HttpServletRequest.class.getMethod("setAttribute",String.class,Object.class),request) );
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81 req.put( "get_parameter", new LuanJavaFunction(HttpServletRequest.class.getMethod("getParameter",String.class),request) );
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82 req.put( "get_parameter_values", new LuanJavaFunction(HttpServletRequest.class.getMethod("getParameterValues",String.class),request) );
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83 req.put( "get_header", new LuanJavaFunction(HttpServletRequest.class.getMethod("getHeader",String.class),request) );
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84 add( req, "get_cookie_value", String.class );
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85 req.put( "method", new LuanJavaFunction(HttpServletRequest.class.getMethod("getMethod"),request) );
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86 req.put( "servlet_path", new LuanJavaFunction(HttpServletRequest.class.getMethod("getServletPath"),request) );
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87 req.put( "server_name", new LuanJavaFunction(HttpServletRequest.class.getMethod("getServerName"),request) );
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88 add( req, "current_url" );
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89 req.put( "remote_address", new LuanJavaFunction(HttpServletRequest.class.getMethod("getRemoteAddr"),request) );
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90 return req;
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91 }
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92
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93 private LuanTable responseTable() throws NoSuchMethodException {
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94 LuanTable resp = new LuanTable();
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95 add( resp, "send_redirect", String.class );
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96 add( resp, "send_error", Integer.TYPE, String.class );
93
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97 resp.put( "contains_header", new LuanJavaFunction(HttpServletResponse.class.getMethod("containsHeader",String.class),response) );
89
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98 resp.put( "set_header", new LuanJavaFunction(HttpServletResponse.class.getMethod("setHeader",String.class,String.class),response) );
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99 add( resp, "set_cookie", String.class, String.class, Boolean.TYPE, String.class );
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100 add( resp, "remove_cookie", String.class, String.class );
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101 return resp;
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102 }
89
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103
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104 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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105 t.put( method, new LuanJavaFunction(HttpLib.class.getMethod(method,parameterTypes),this) );
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106 }
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107
136
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108 public void text_write(LuanState luan,Object... args) throws LuanException, IOException {
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109 if( writer == null )
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110 writer = response.getWriter();
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111 for( Object obj : args ) {
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112 writer.print( luan.toString(obj) );
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113 }
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114 }
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115
89
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116 public String get_cookie_value(String name) {
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117 return getCookieValue(request, name);
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118 }
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119
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120 public String current_url() {
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121 return getCurrentURL(request);
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122 }
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123
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124 public void send_redirect(String redirectUrl)
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125 throws IOException
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126 {
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127 response.sendRedirect(redirectUrl);
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128 throw new LuanExitException();
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129 }
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130
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131 public void send_error(int code,String text)
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132 throws IOException
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133 {
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134 response.sendError(code, text);
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135 throw new LuanExitException();
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136 }
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137
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138 public void set_cookie(String name,String value,boolean isPersistent, String domain) {
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139 setCookie(request,response,name,value,isPersistent,domain);
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140 }
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141
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142 public void remove_cookie(String name, String domain) {
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143 removeCookie(request,response,name,domain);
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144 }
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145
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146
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147 // static utils
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148
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149 public static String getQueryString(HttpServletRequest request) {
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150 return getQueryString(request,0);
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151 }
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152
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153 public static String getQueryString(HttpServletRequest request,int maxValueLen) {
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154 String method = request.getMethod();
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155 if( method.equals("GET") )
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156 return request.getQueryString();
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157 if( !method.equals("POST") && !method.equals("HEAD") )
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158 throw new RuntimeException(method);
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159 Enumeration en = request.getParameterNames();
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160 StringBuilder queryBuf = new StringBuilder();
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161 if( !en.hasMoreElements() )
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162 return null;
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163 do {
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164 String param = (String)en.nextElement();
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165 String value = request.getParameter(param);
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166 if( maxValueLen > 0 ) {
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167 int len = value.length();
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168 if( len > maxValueLen )
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169 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen);
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170 }
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171 queryBuf.append(param);
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172 queryBuf.append('=');
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173 queryBuf.append(value);
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174 queryBuf.append('&');
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175 } while( en.hasMoreElements() );
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176 queryBuf.deleteCharAt(queryBuf.length() - 1);
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177 return queryBuf.toString();
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178 }
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179
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180 public static String getCurrentURL(HttpServletRequest request) {
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181 return getCurrentURL(request,0);
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182 }
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183
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184 public static String getCurrentURL(HttpServletRequest request,int maxValueLen) {
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185 // StringBuffer buf = HttpUtils.getRequestURL(request);
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186 StringBuffer buf = request.getRequestURL();
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187 String qStr = getQueryString(request,maxValueLen);
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188 if(qStr != null && qStr.length() > 0) {
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189 buf.append('?');
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190 buf.append(qStr);
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191 }
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192 return buf.toString();
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193 }
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194
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195 private static String escape(String value) {
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196 return value.replaceAll(";", "%3B");
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197 }
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198
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199 private static String unescape(String value) {
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200 return value.replaceAll("%3B", ";");
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201 }
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202
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203 private static Cookie getCookie(HttpServletRequest request,String name) {
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204 Cookie[] cookies = request.getCookies();
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205 if( cookies == null )
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206 return null;
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207 for (Cookie cookie : cookies) {
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208 if (cookie.getName().equals(name))
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209 return cookie;
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210 }
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211 return null;
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212 }
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213
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214 public static String getCookieValue(HttpServletRequest request,String name) {
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215 Cookie cookie = getCookie(request,name);
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216 return cookie==null ? null : unescape(cookie.getValue());
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217 }
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218
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219 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) {
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220 Cookie cookie = getCookie(request,name);
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221 if( cookie==null || !cookie.getValue().equals(value) ) {
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222 cookie = new Cookie(name, escape(value));
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223 cookie.setPath("/");
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224 if (domain != null && domain.length() > 0)
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225 cookie.setDomain(domain);
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226 if( isPersistent )
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227 cookie.setMaxAge(10000000);
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228 response.addCookie(cookie);
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229 }
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230 }
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231
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232 public static void removeCookie(HttpServletRequest request,
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233 HttpServletResponse response,
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234 String name,
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235 String domain
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236
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237 ) {
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238 Cookie cookie = getCookie(request, name);
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239 if(cookie != null) {
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240 Cookie delCookie = new Cookie(name, "delete");
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241 delCookie.setPath("/");
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242 delCookie.setMaxAge(0);
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243 if (domain != null && domain.length() > 0)
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244 delCookie.setDomain(domain);
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245 response.addCookie(delCookie);
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246 }
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247 }
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248
76
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249 }