Mercurial Hosting > luan
annotate src/luan/lib/HttpLib.java @ 140:f4ce03ff6b2f
add per_session for Http
git-svn-id: https://luan-java.googlecode.com/svn/trunk@141 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Fri, 13 Jun 2014 15:04:29 +0000 |
parents | 3b384dc5ca91 |
children | 05f8c21160ef |
rev | line source |
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1 package luan.lib; |
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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 |
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24 |
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25 public final class HttpLib { |
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26 |
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27 public static final String NAME = "Http"; |
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28 |
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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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34 |
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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 = PackageLib.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)PackageLib.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(NAME); |
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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 HttpLib lib = new HttpLib(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 HttpLib.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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84 |
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85 |
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86 |
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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 HttpLib(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 { |
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98 LuanTable req = new LuanTable(); |
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99 req.put( "get_attribute", new LuanJavaFunction(HttpServletRequest.class.getMethod("getAttribute",String.class),request) ); |
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100 req.put( "set_attribute", new LuanJavaFunction(HttpServletRequest.class.getMethod("setAttribute",String.class,Object.class),request) ); |
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101 req.put( "get_parameter", new LuanJavaFunction(HttpServletRequest.class.getMethod("getParameter",String.class),request) ); |
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102 req.put( "get_parameter_values", new LuanJavaFunction(HttpServletRequest.class.getMethod("getParameterValues",String.class),request) ); |
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103 req.put( "get_header", new LuanJavaFunction(HttpServletRequest.class.getMethod("getHeader",String.class),request) ); |
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104 add( req, "get_cookie_value", String.class ); |
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105 req.put( "method", new LuanJavaFunction(HttpServletRequest.class.getMethod("getMethod"),request) ); |
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106 req.put( "servlet_path", new LuanJavaFunction(HttpServletRequest.class.getMethod("getServletPath"),request) ); |
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107 req.put( "server_name", new LuanJavaFunction(HttpServletRequest.class.getMethod("getServerName"),request) ); |
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108 add( req, "current_url" ); |
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109 req.put( "remote_address", new LuanJavaFunction(HttpServletRequest.class.getMethod("getRemoteAddr"),request) ); |
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110 add( req, "get_session_attribute", String.class ); |
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111 add( req, "set_session_attribute", String.class, Object.class ); |
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112 return req; |
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113 } |
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114 |
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115 private LuanTable responseTable() throws NoSuchMethodException { |
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116 LuanTable resp = new LuanTable(); |
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117 add( resp, "send_redirect", String.class ); |
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118 add( resp, "send_error", Integer.TYPE, String.class ); |
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119 resp.put( "contains_header", new LuanJavaFunction(HttpServletResponse.class.getMethod("containsHeader",String.class),response) ); |
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120 resp.put( "set_header", new LuanJavaFunction(HttpServletResponse.class.getMethod("setHeader",String.class,String.class),response) ); |
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121 add( resp, "set_cookie", String.class, String.class, Boolean.TYPE, String.class ); |
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122 add( resp, "remove_cookie", String.class, String.class ); |
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123 resp.put( "set_content_type", new LuanJavaFunction(HttpServletResponse.class.getMethod("setContentType",String.class),response) ); |
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124 add( resp, "text_writer" ); |
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125 return resp; |
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126 } |
89
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127 |
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128 private void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException { |
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129 t.put( method, new LuanJavaFunction(HttpLib.class.getMethod(method,parameterTypes),this) ); |
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130 } |
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131 /* |
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132 public void text_write(LuanState luan,Object... args) throws LuanException, IOException { |
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133 if( writer == null ) |
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134 writer = response.getWriter(); |
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135 for( Object obj : args ) { |
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136 writer.print( luan.toString(obj) ); |
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137 } |
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138 } |
138
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139 */ |
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140 public LuanTable text_writer() throws IOException { |
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141 return IoLib.textWriter(response.getWriter()); |
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142 } |
136
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143 |
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144 public String get_cookie_value(String name) { |
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145 return getCookieValue(request, name); |
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146 } |
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147 |
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148 public String current_url() { |
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149 return getCurrentURL(request); |
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150 } |
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151 |
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152 public void send_redirect(String redirectUrl) |
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153 throws IOException |
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154 { |
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155 response.sendRedirect(redirectUrl); |
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156 throw new LuanExitException(); |
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157 } |
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158 |
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159 public void send_error(int code,String text) |
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160 throws IOException |
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161 { |
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162 response.sendError(code, text); |
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163 throw new LuanExitException(); |
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164 } |
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165 |
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166 public void set_cookie(String name,String value,boolean isPersistent, String domain) { |
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167 setCookie(request,response,name,value,isPersistent,domain); |
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168 } |
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169 |
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170 public void remove_cookie(String name, String domain) { |
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171 removeCookie(request,response,name,domain); |
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172 } |
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173 |
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174 public Object get_session_attribute(String name) { |
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175 return request.getSession().getAttribute(name); |
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176 } |
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177 |
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178 public void set_session_attribute(String name,Object value) { |
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179 request.getSession().setAttribute(name,value); |
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180 } |
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181 |
89
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182 |
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183 // static utils |
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184 |
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185 public static String getQueryString(HttpServletRequest request) { |
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186 return getQueryString(request,0); |
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187 } |
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188 |
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189 public static String getQueryString(HttpServletRequest request,int maxValueLen) { |
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190 String method = request.getMethod(); |
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191 if( method.equals("GET") ) |
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192 return request.getQueryString(); |
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193 if( !method.equals("POST") && !method.equals("HEAD") ) |
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194 throw new RuntimeException(method); |
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195 Enumeration en = request.getParameterNames(); |
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196 StringBuilder queryBuf = new StringBuilder(); |
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197 if( !en.hasMoreElements() ) |
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198 return null; |
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199 do { |
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200 String param = (String)en.nextElement(); |
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201 String value = request.getParameter(param); |
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202 if( maxValueLen > 0 ) { |
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203 int len = value.length(); |
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204 if( len > maxValueLen ) |
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205 value = value.substring(0,maxValueLen) + "..." + (len-maxValueLen); |
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206 } |
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207 queryBuf.append(param); |
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208 queryBuf.append('='); |
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209 queryBuf.append(value); |
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210 queryBuf.append('&'); |
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211 } while( en.hasMoreElements() ); |
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212 queryBuf.deleteCharAt(queryBuf.length() - 1); |
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213 return queryBuf.toString(); |
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214 } |
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215 |
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216 public static String getCurrentURL(HttpServletRequest request) { |
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217 return getCurrentURL(request,0); |
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218 } |
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219 |
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220 public static String getCurrentURL(HttpServletRequest request,int maxValueLen) { |
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221 // StringBuffer buf = HttpUtils.getRequestURL(request); |
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222 StringBuffer buf = request.getRequestURL(); |
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223 String qStr = getQueryString(request,maxValueLen); |
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224 if(qStr != null && qStr.length() > 0) { |
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225 buf.append('?'); |
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226 buf.append(qStr); |
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227 } |
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228 return buf.toString(); |
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229 } |
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230 |
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231 private static String escape(String value) { |
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232 return value.replaceAll(";", "%3B"); |
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233 } |
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234 |
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235 private static String unescape(String value) { |
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236 return value.replaceAll("%3B", ";"); |
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237 } |
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238 |
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239 private static Cookie getCookie(HttpServletRequest request,String name) { |
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240 Cookie[] cookies = request.getCookies(); |
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241 if( cookies == null ) |
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242 return null; |
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243 for (Cookie cookie : cookies) { |
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244 if (cookie.getName().equals(name)) |
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245 return cookie; |
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246 } |
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247 return null; |
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248 } |
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249 |
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250 public static String getCookieValue(HttpServletRequest request,String name) { |
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251 Cookie cookie = getCookie(request,name); |
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252 return cookie==null ? null : unescape(cookie.getValue()); |
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253 } |
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254 |
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255 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) { |
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256 Cookie cookie = getCookie(request,name); |
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257 if( cookie==null || !cookie.getValue().equals(value) ) { |
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258 cookie = new Cookie(name, escape(value)); |
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259 cookie.setPath("/"); |
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260 if (domain != null && domain.length() > 0) |
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261 cookie.setDomain(domain); |
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262 if( isPersistent ) |
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263 cookie.setMaxAge(10000000); |
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264 response.addCookie(cookie); |
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265 } |
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266 } |
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267 |
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268 public static void removeCookie(HttpServletRequest request, |
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269 HttpServletResponse response, |
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270 String name, |
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271 String domain |
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272 |
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273 ) { |
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274 Cookie cookie = getCookie(request, name); |
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275 if(cookie != null) { |
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276 Cookie delCookie = new Cookie(name, "delete"); |
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277 delCookie.setPath("/"); |
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278 delCookie.setMaxAge(0); |
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279 if (domain != null && domain.length() > 0) |
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280 delCookie.setDomain(domain); |
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281 response.addCookie(delCookie); |
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282 } |
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283 } |
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284 |
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285 } |