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annotate src/luan/lib/HttpLib.java @ 138:06159094b802

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replace WebRun.java with web_run.luan git-svn-id: https://luan-java.googlecode.com/svn/trunk@139 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 12 Jun 2014 08:20:48 +0000
parents 7e160d2f6d9c
children 3b384dc5ca91
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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 LuanFunction fn;
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37 synchronized(luan) {
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38 Object mod = PackageLib.require(luan,modName);
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39 if( !(mod instanceof LuanFunction) )
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40 throw luan.exception( "module '"+modName+"' must return a function" );
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41 fn = (LuanFunction)mod;
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42 DeepCloner cloner = new DeepCloner();
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43 luan = cloner.deepClone(luan);
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44 fn = cloner.get(fn);
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45 }
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47 LuanTable module = (LuanTable)luan.loaded().get(NAME);
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48 if( module == null )
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49 throw luan.exception( "module 'Http' not defined" );
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50 HttpLib lib = new HttpLib(request,response);
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51 try {
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52 module.put( "request", lib.requestTable() );
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53 module.put( "response", lib.responseTable() );
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54 /*
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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 */
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59 } catch(NoSuchMethodException e) {
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60 throw new RuntimeException(e);
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61 }
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63 luan.call(fn,"<http>");
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64 }
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68 private final HttpServletRequest request;
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69 private final HttpServletResponse response;
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70 // private PrintWriter writer = null;
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71 // private ServletOutputStream sos = null;
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73 private HttpLib(HttpServletRequest request,HttpServletResponse response) {
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74 this.request = request;
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75 this.response = response;
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76 }
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78 private LuanTable requestTable() throws NoSuchMethodException {
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79 LuanTable req = new LuanTable();
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80 req.put( "get_attribute", new LuanJavaFunction(HttpServletRequest.class.getMethod("getAttribute",String.class),request) );
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81 req.put( "set_attribute", new LuanJavaFunction(HttpServletRequest.class.getMethod("setAttribute",String.class,Object.class),request) );
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82 req.put( "get_parameter", new LuanJavaFunction(HttpServletRequest.class.getMethod("getParameter",String.class),request) );
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83 req.put( "get_parameter_values", new LuanJavaFunction(HttpServletRequest.class.getMethod("getParameterValues",String.class),request) );
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84 req.put( "get_header", new LuanJavaFunction(HttpServletRequest.class.getMethod("getHeader",String.class),request) );
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85 add( req, "get_cookie_value", String.class );
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86 req.put( "method", new LuanJavaFunction(HttpServletRequest.class.getMethod("getMethod"),request) );
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87 req.put( "servlet_path", new LuanJavaFunction(HttpServletRequest.class.getMethod("getServletPath"),request) );
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88 req.put( "server_name", new LuanJavaFunction(HttpServletRequest.class.getMethod("getServerName"),request) );
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89 add( req, "current_url" );
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90 req.put( "remote_address", new LuanJavaFunction(HttpServletRequest.class.getMethod("getRemoteAddr"),request) );
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91 return req;
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92 }
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94 private LuanTable responseTable() throws NoSuchMethodException {
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95 LuanTable resp = new LuanTable();
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96 add( resp, "send_redirect", String.class );
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97 add( resp, "send_error", Integer.TYPE, String.class );
93
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98 resp.put( "contains_header", new LuanJavaFunction(HttpServletResponse.class.getMethod("containsHeader",String.class),response) );
89
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99 resp.put( "set_header", new LuanJavaFunction(HttpServletResponse.class.getMethod("setHeader",String.class,String.class),response) );
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100 add( resp, "set_cookie", String.class, String.class, Boolean.TYPE, String.class );
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101 add( resp, "remove_cookie", String.class, String.class );
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102 resp.put( "set_content_type", new LuanJavaFunction(HttpServletResponse.class.getMethod("setContentType",String.class),response) );
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103 add( resp, "text_writer" );
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104 return resp;
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105 }
89
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106
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107 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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108 t.put( method, new LuanJavaFunction(HttpLib.class.getMethod(method,parameterTypes),this) );
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109 }
138
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110 /*
136
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111 public void text_write(LuanState luan,Object... args) throws LuanException, IOException {
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112 if( writer == null )
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113 writer = response.getWriter();
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114 for( Object obj : args ) {
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115 writer.print( luan.toString(obj) );
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116 }
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117 }
138
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118 */
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119 public LuanTable text_writer() throws IOException {
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120 return IoLib.textWriter(response.getWriter());
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121 }
136
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122
89
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123 public String get_cookie_value(String name) {
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124 return getCookieValue(request, name);
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125 }
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126
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127 public String current_url() {
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128 return getCurrentURL(request);
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129 }
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130
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131 public void send_redirect(String redirectUrl)
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132 throws IOException
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133 {
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134 response.sendRedirect(redirectUrl);
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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 send_error(int code,String text)
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139 throws IOException
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140 {
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141 response.sendError(code, text);
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142 throw new LuanExitException();
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143 }
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144
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145 public void set_cookie(String name,String value,boolean isPersistent, String domain) {
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146 setCookie(request,response,name,value,isPersistent,domain);
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147 }
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148
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149 public void remove_cookie(String name, String domain) {
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150 removeCookie(request,response,name,domain);
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151 }
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152
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153
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154 // static utils
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155
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156 public static String getQueryString(HttpServletRequest request) {
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157 return getQueryString(request,0);
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158 }
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159
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160 public static String getQueryString(HttpServletRequest request,int maxValueLen) {
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161 String method = request.getMethod();
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162 if( method.equals("GET") )
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163 return request.getQueryString();
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164 if( !method.equals("POST") && !method.equals("HEAD") )
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165 throw new RuntimeException(method);
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166 Enumeration en = request.getParameterNames();
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167 StringBuilder queryBuf = new StringBuilder();
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168 if( !en.hasMoreElements() )
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169 return null;
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170 do {
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171 String param = (String)en.nextElement();
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172 String value = request.getParameter(param);
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173 if( maxValueLen > 0 ) {
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174 int len = value.length();
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175 if( len > maxValueLen )
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176 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen);
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177 }
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178 queryBuf.append(param);
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179 queryBuf.append('=');
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180 queryBuf.append(value);
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181 queryBuf.append('&');
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182 } while( en.hasMoreElements() );
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183 queryBuf.deleteCharAt(queryBuf.length() - 1);
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184 return queryBuf.toString();
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185 }
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186
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187 public static String getCurrentURL(HttpServletRequest request) {
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188 return getCurrentURL(request,0);
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189 }
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190
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191 public static String getCurrentURL(HttpServletRequest request,int maxValueLen) {
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192 // StringBuffer buf = HttpUtils.getRequestURL(request);
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193 StringBuffer buf = request.getRequestURL();
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194 String qStr = getQueryString(request,maxValueLen);
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195 if(qStr != null && qStr.length() > 0) {
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196 buf.append('?');
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197 buf.append(qStr);
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198 }
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199 return buf.toString();
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200 }
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201
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202 private static String escape(String value) {
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203 return value.replaceAll(";", "%3B");
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204 }
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205
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206 private static String unescape(String value) {
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207 return value.replaceAll("%3B", ";");
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208 }
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209
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210 private static Cookie getCookie(HttpServletRequest request,String name) {
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211 Cookie[] cookies = request.getCookies();
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212 if( cookies == null )
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213 return null;
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214 for (Cookie cookie : cookies) {
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215 if (cookie.getName().equals(name))
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216 return cookie;
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217 }
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218 return null;
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219 }
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220
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221 public static String getCookieValue(HttpServletRequest request,String name) {
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222 Cookie cookie = getCookie(request,name);
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223 return cookie==null ? null : unescape(cookie.getValue());
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224 }
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225
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226 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) {
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227 Cookie cookie = getCookie(request,name);
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228 if( cookie==null || !cookie.getValue().equals(value) ) {
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229 cookie = new Cookie(name, escape(value));
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230 cookie.setPath("/");
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231 if (domain != null && domain.length() > 0)
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232 cookie.setDomain(domain);
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233 if( isPersistent )
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234 cookie.setMaxAge(10000000);
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235 response.addCookie(cookie);
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236 }
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237 }
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238
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239 public static void removeCookie(HttpServletRequest request,
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240 HttpServletResponse response,
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241 String name,
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242 String domain
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243
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244 ) {
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245 Cookie cookie = getCookie(request, name);
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246 if(cookie != null) {
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247 Cookie delCookie = new Cookie(name, "delete");
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248 delCookie.setPath("/");
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249 delCookie.setMaxAge(0);
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250 if (domain != null && domain.length() > 0)
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251 delCookie.setDomain(domain);
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252 response.addCookie(delCookie);
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253 }
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254 }
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255
76
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256 }