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annotate src/luan/modules/web/HttpLuan.java @ 169:9169581dc8fc

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add luan.modules.web git-svn-id: https://luan-java.googlecode.com/svn/trunk@170 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Sun, 22 Jun 2014 04:52:16 +0000
parents src/luan/modules/HttpLuan.java@ebe9db183eb7
children
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1 package luan.modules.web;
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2
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3 import java.io.PrintWriter;
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4 import java.io.IOException;
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5 import java.util.Map;
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6 import java.util.Set;
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7 import java.util.Arrays;
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8 import java.util.Enumeration;
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9 import javax.servlet.ServletOutputStream;
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10 import javax.servlet.http.Cookie;
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11 import javax.servlet.http.HttpServletRequest;
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12 import javax.servlet.http.HttpServletResponse;
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13 import javax.servlet.http.HttpSession;
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14 import luan.Luan;
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15 import luan.LuanState;
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16 import luan.LuanFunction;
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17 import luan.LuanElement;
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18 import luan.LuanException;
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19 import luan.LuanTable;
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20 import luan.LuanJavaFunction;
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21 import luan.LuanExitException;
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22 import luan.DeepCloner;
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23 import luan.modules.PackageLuan;
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24 import luan.modules.IoLuan;
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27 public final class HttpLuan {
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29 public static final LuanFunction LOADER = new LuanFunction() {
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30 @Override public Object call(LuanState luan,Object[] args) {
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31 return new LuanTable(); // starts empty
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32 }
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33 };
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35 public static void service(LuanState luan,HttpServletRequest request,HttpServletResponse response,String modName)
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36 throws LuanException
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37 {
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38 LuanFunction fn;
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39 synchronized(luan) {
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40 Object mod = PackageLuan.require(luan,modName);
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41 if( !(mod instanceof LuanTable) )
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42 throw luan.exception( "module '"+modName+"' must return a table" );
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43 LuanTable tbl = (LuanTable)mod;
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44 if( Luan.toBoolean( tbl.get("per_session") ) ) {
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45 HttpSession session = request.getSession();
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46 LuanState sessionLuan = (LuanState)session.getValue("luan");
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47 if( sessionLuan!=null ) {
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48 luan = sessionLuan;
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49 } else {
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50 DeepCloner cloner = new DeepCloner();
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51 luan = cloner.deepClone(luan);
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52 session.putValue("luan",luan);
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53 }
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54 tbl = (LuanTable)PackageLuan.require(luan,modName);
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55 fn = (LuanFunction)tbl.get("page");
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56 } else {
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57 fn = (LuanFunction)tbl.get("page");
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58 if( fn == null )
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59 throw luan.exception( "function 'page' is not defined" );
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60 DeepCloner cloner = new DeepCloner();
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61 luan = cloner.deepClone(luan);
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62 fn = cloner.get(fn);
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63 }
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64 }
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65
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66 LuanTable module = (LuanTable)luan.loaded().get("Http");
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67 if( module == null )
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68 throw luan.exception( "module 'Http' not defined" );
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69 HttpLuan lib = new HttpLuan(request,response);
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70 try {
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71 module.put( "request", lib.requestTable() );
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72 module.put( "response", lib.responseTable() );
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73 /*
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74 module.put( "write", new LuanJavaFunction(
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75 HttpLuan.class.getMethod( "text_write", LuanState.class, new Object[0].getClass() ), lib
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76 ) );
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77 */
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78 } catch(NoSuchMethodException e) {
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79 throw new RuntimeException(e);
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80 }
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81
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82 luan.call(fn,"<http>");
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83 }
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87 private final HttpServletRequest request;
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88 private final HttpServletResponse response;
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89 // private PrintWriter writer = null;
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90 // private ServletOutputStream sos = null;
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91
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92 private HttpLuan(HttpServletRequest request,HttpServletResponse response) {
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93 this.request = request;
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94 this.response = response;
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95 }
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96
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97 private LuanTable requestTable() throws NoSuchMethodException {
89
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98 LuanTable req = new LuanTable();
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99 req.put("java",request);
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100 req.put( "get_attribute", new LuanJavaFunction(HttpServletRequest.class.getMethod("getAttribute",String.class),request) );
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101 req.put( "set_attribute", new LuanJavaFunction(HttpServletRequest.class.getMethod("setAttribute",String.class,Object.class),request) );
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102 req.put( "get_parameter", new LuanJavaFunction(HttpServletRequest.class.getMethod("getParameter",String.class),request) );
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103 req.put( "get_parameter_values", new LuanJavaFunction(HttpServletRequest.class.getMethod("getParameterValues",String.class),request) );
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104 req.put( "get_header", new LuanJavaFunction(HttpServletRequest.class.getMethod("getHeader",String.class),request) );
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105 add( req, "get_cookie_value", String.class );
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106 req.put( "method", new LuanJavaFunction(HttpServletRequest.class.getMethod("getMethod"),request) );
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107 req.put( "servlet_path", new LuanJavaFunction(HttpServletRequest.class.getMethod("getServletPath"),request) );
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108 req.put( "server_name", new LuanJavaFunction(HttpServletRequest.class.getMethod("getServerName"),request) );
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109 add( req, "current_url" );
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110 req.put( "remote_address", new LuanJavaFunction(HttpServletRequest.class.getMethod("getRemoteAddr"),request) );
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111 add( req, "get_session_attribute", String.class );
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112 add( req, "set_session_attribute", String.class, Object.class );
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113 return req;
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114 }
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115
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116 private LuanTable responseTable() throws NoSuchMethodException {
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117 LuanTable resp = new LuanTable();
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118 resp.put("java",response);
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119 add( resp, "send_redirect", String.class );
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120 add( resp, "send_error", Integer.TYPE, String.class );
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121 resp.put( "contains_header", new LuanJavaFunction(HttpServletResponse.class.getMethod("containsHeader",String.class),response) );
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122 resp.put( "set_header", new LuanJavaFunction(HttpServletResponse.class.getMethod("setHeader",String.class,String.class),response) );
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123 add( resp, "set_cookie", String.class, String.class, Boolean.TYPE, String.class );
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124 add( resp, "remove_cookie", String.class, String.class );
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125 resp.put( "set_content_type", new LuanJavaFunction(HttpServletResponse.class.getMethod("setContentType",String.class),response) );
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126 add( resp, "text_writer" );
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127 return resp;
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128 }
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129
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130 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
168
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131 t.put( method, new LuanJavaFunction(HttpLuan.class.getMethod(method,parameterTypes),this) );
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132 }
138
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133 /*
136
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134 public void text_write(LuanState luan,Object... args) throws LuanException, IOException {
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135 if( writer == null )
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136 writer = response.getWriter();
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137 for( Object obj : args ) {
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138 writer.print( luan.toString(obj) );
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139 }
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140 }
138
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141 */
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142 public LuanTable text_writer() throws IOException {
168
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143 return IoLuan.textWriter(response.getWriter());
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144 }
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145
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146 public String get_cookie_value(String name) {
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147 return getCookieValue(request, name);
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148 }
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149
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150 public String current_url() {
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151 return getCurrentURL(request);
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152 }
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153
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154 public void send_redirect(String redirectUrl)
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155 throws IOException
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156 {
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157 response.sendRedirect(redirectUrl);
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158 throw new LuanExitException();
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159 }
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160
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161 public void send_error(int code,String text)
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162 throws IOException
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163 {
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164 response.sendError(code, text);
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165 throw new LuanExitException();
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166 }
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167
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168 public void set_cookie(String name,String value,boolean isPersistent, String domain) {
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169 setCookie(request,response,name,value,isPersistent,domain);
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170 }
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171
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172 public void remove_cookie(String name, String domain) {
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173 removeCookie(request,response,name,domain);
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174 }
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175
139
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176 public Object get_session_attribute(String name) {
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177 return request.getSession().getAttribute(name);
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178 }
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179
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180 public void set_session_attribute(String name,Object value) {
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181 request.getSession().setAttribute(name,value);
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182 }
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183
89
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184
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185 // static utils
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186
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187 public static String getQueryString(HttpServletRequest request) {
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188 return getQueryString(request,0);
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189 }
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190
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191 public static String getQueryString(HttpServletRequest request,int maxValueLen) {
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192 String method = request.getMethod();
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193 if( method.equals("GET") )
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194 return request.getQueryString();
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195 if( !method.equals("POST") && !method.equals("HEAD") )
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196 throw new RuntimeException(method);
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197 Enumeration en = request.getParameterNames();
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198 StringBuilder queryBuf = new StringBuilder();
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199 if( !en.hasMoreElements() )
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200 return null;
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201 do {
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202 String param = (String)en.nextElement();
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203 String value = request.getParameter(param);
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204 if( maxValueLen > 0 ) {
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205 int len = value.length();
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206 if( len > maxValueLen )
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207 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen);
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208 }
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209 queryBuf.append(param);
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210 queryBuf.append('=');
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211 queryBuf.append(value);
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212 queryBuf.append('&');
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213 } while( en.hasMoreElements() );
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214 queryBuf.deleteCharAt(queryBuf.length() - 1);
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215 return queryBuf.toString();
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216 }
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217
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218 public static String getCurrentURL(HttpServletRequest request) {
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219 return getCurrentURL(request,0);
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220 }
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221
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222 public static String getCurrentURL(HttpServletRequest request,int maxValueLen) {
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223 // StringBuffer buf = HttpUtils.getRequestURL(request);
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224 StringBuffer buf = request.getRequestURL();
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225 String qStr = getQueryString(request,maxValueLen);
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226 if(qStr != null && qStr.length() > 0) {
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227 buf.append('?');
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228 buf.append(qStr);
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229 }
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230 return buf.toString();
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231 }
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232
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233 private static String escape(String value) {
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234 return value.replaceAll(";", "%3B");
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235 }
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236
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237 private static String unescape(String value) {
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238 return value.replaceAll("%3B", ";");
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239 }
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240
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241 private static Cookie getCookie(HttpServletRequest request,String name) {
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242 Cookie[] cookies = request.getCookies();
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243 if( cookies == null )
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244 return null;
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245 for (Cookie cookie : cookies) {
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246 if (cookie.getName().equals(name))
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247 return cookie;
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248 }
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249 return null;
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250 }
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251
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252 public static String getCookieValue(HttpServletRequest request,String name) {
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253 Cookie cookie = getCookie(request,name);
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254 return cookie==null ? null : unescape(cookie.getValue());
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255 }
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256
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257 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) {
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258 Cookie cookie = getCookie(request,name);
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259 if( cookie==null || !cookie.getValue().equals(value) ) {
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260 cookie = new Cookie(name, escape(value));
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261 cookie.setPath("/");
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262 if (domain != null && domain.length() > 0)
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263 cookie.setDomain(domain);
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264 if( isPersistent )
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265 cookie.setMaxAge(10000000);
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266 response.addCookie(cookie);
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267 }
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268 }
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269
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270 public static void removeCookie(HttpServletRequest request,
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271 HttpServletResponse response,
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272 String name,
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273 String domain
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274
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275 ) {
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276 Cookie cookie = getCookie(request, name);
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277 if(cookie != null) {
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278 Cookie delCookie = new Cookie(name, "delete");
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279 delCookie.setPath("/");
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280 delCookie.setMaxAge(0);
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281 if (domain != null && domain.length() > 0)
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282 delCookie.setDomain(domain);
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283 response.addCookie(delCookie);
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284 }
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285 }
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286
76
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287 }