Mercurial Hosting > luan
annotate src/luan/modules/http/HttpServicer.java @ 787:c49980cdece6
use incremental cloning to serve web pages
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 04 Sep 2016 00:18:00 -0600 |
parents | d69d3c51c44e |
children | 60661a8e738c |
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1 package luan.modules.http; |
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2 |
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3 import java.io.InputStream; |
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4 import java.io.BufferedInputStream; |
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5 import java.io.PrintWriter; |
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6 import java.io.IOException; |
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7 import java.util.Map; |
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8 import java.util.Set; |
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9 import java.util.List; |
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10 import java.util.ArrayList; |
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11 import java.util.Arrays; |
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12 import java.util.Iterator; |
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13 import java.util.Enumeration; |
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14 import java.util.concurrent.Executor; |
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15 import java.util.concurrent.Executors; |
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16 import javax.servlet.ServletOutputStream; |
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17 import javax.servlet.ServletException; |
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18 import javax.servlet.http.Cookie; |
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19 import javax.servlet.http.HttpServletRequest; |
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20 import javax.servlet.http.HttpServletResponse; |
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21 import javax.servlet.http.HttpSession; |
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22 import javax.servlet.http.Part; |
436 | 23 import org.slf4j.Logger; |
24 import org.slf4j.LoggerFactory; | |
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25 import org.eclipse.jetty.util.MultiPartInputStream; |
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26 import luan.Luan; |
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27 import luan.LuanState; |
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28 import luan.LuanFunction; |
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29 import luan.LuanException; |
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30 import luan.LuanTable; |
405 | 31 import luan.LuanMeta; |
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32 import luan.LuanPropertyMeta; |
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33 import luan.LuanCloner; |
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34 import luan.modules.PackageLuan; |
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35 import luan.modules.IoLuan; |
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36 import luan.modules.TableLuan; |
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37 import luan.modules.Utils; |
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38 import luan.modules.url.LuanUrl; |
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39 |
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40 |
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41 public final class HttpServicer { |
436 | 42 private static final Logger logger = LoggerFactory.getLogger(HttpServicer.class); |
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43 |
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44 public static boolean service(LuanState luan,HttpServletRequest request,HttpServletResponse response,String modName) |
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45 throws LuanException |
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46 { |
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47 LuanFunction fn; |
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48 synchronized(luan) { |
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49 if( luan.isLocked ) { |
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50 if( PackageLuan.wouldLoad(luan,"luan:http/Http.luan") || PackageLuan.wouldLoad(luan,modName) ) { |
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51 luan.isLocked = false; |
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52 luan.deepenClone(luan,new LuanCloner(LuanCloner.Type.COMPLETE)); |
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53 } |
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54 } |
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55 LuanTable module = (LuanTable)PackageLuan.require(luan,"luan:http/Http.luan"); |
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56 LuanTable per_session_pages = (LuanTable)module.rawGet("per_session_pages"); |
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57 Object mod = PackageLuan.load(luan,modName); |
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58 if( mod==null ) |
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59 return false; |
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60 if( !(mod instanceof LuanFunction) ) |
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61 throw new LuanException( "module '"+modName+"' must return a function" ); |
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62 if( Boolean.TRUE.equals(per_session_pages.rawGet(mod)) ) { |
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63 HttpSession session = request.getSession(); |
741 | 64 LuanState sessionLuan = (LuanState)session.getAttribute("luan"); |
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65 if( sessionLuan!=null ) { |
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66 luan = sessionLuan; |
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67 } else { |
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68 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
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69 luan = (LuanState)cloner.clone(luan); |
741 | 70 session.setAttribute("luan",luan); |
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71 } |
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72 fn = (LuanFunction)PackageLuan.require(luan,modName); |
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73 } else { |
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74 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); |
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75 luan = (LuanState)cloner.clone(luan); |
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76 fn = (LuanFunction)cloner.get(mod); |
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77 } |
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78 } |
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79 |
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80 LuanTable module = (LuanTable)PackageLuan.require(luan,"luan:http/Http.luan"); |
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81 |
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82 // request |
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83 LuanFunction newRequestFn = (LuanFunction)module.rawGet("new_request"); |
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84 LuanTable requestTbl = (LuanTable)newRequestFn.call(luan); |
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85 module.rawPut("request",requestTbl); |
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86 requestTbl.rawPut("java",request); |
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87 requestTbl.rawPut("method",request.getMethod()); |
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88 requestTbl.rawPut("path",request.getRequestURI()); |
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89 requestTbl.rawPut("protocol",request.getProtocol()); |
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90 requestTbl.rawPut("scheme",request.getScheme()); |
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91 requestTbl.rawPut("port",request.getServerPort()); |
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92 |
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93 LuanTable headersTbl = (LuanTable)requestTbl.rawGet("headers"); |
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94 for( Enumeration<String> enKeys = request.getHeaderNames(); enKeys.hasMoreElements(); ) { |
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95 String key = enKeys.nextElement(); |
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96 LuanTable values = new LuanTable(); |
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97 for( Enumeration<String> en = request.getHeaders(key); en.hasMoreElements(); ) { |
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98 values.rawPut(values.rawLength()+1,en.nextElement()); |
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99 } |
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100 key = toLuanHeaderName(key); |
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101 headersTbl.rawPut(key,values); |
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102 } |
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103 |
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104 LuanTable parametersTbl = (LuanTable)requestTbl.rawGet("parameters"); |
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105 String contentType = request.getContentType(); |
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106 if( contentType==null || !contentType.startsWith("multipart/form-data") ) { |
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107 for( Map.Entry<String,String[]> entry : request.getParameterMap().entrySet() ) { |
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108 parametersTbl.rawPut(entry.getKey(),new LuanTable(Arrays.asList(entry.getValue()))); |
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109 } |
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110 } else { // multipart |
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111 try { |
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112 InputStream in = new BufferedInputStream(request.getInputStream()); |
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113 final MultiPartInputStream mpis = new MultiPartInputStream(in,contentType,null,null); |
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114 mpis.setDeleteOnExit(true); |
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115 for( Part p : mpis.getParts() ) { |
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116 final MultiPartInputStream.MultiPart part = (MultiPartInputStream.MultiPart)p; |
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117 String name = part.getName(); |
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118 /* |
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119 System.out.println("name = "+name); |
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120 System.out.println("getContentType = "+part.getContentType()); |
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121 System.out.println("getHeaderNames = "+part.getHeaderNames()); |
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122 System.out.println("content-disposition = "+part.getHeader("content-disposition")); |
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123 System.out.println(); |
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124 */ |
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125 Object value; |
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126 String filename = part.getContentDispositionFilename(); |
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127 if( filename == null ) { |
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128 value = new String(part.getBytes()); |
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129 } else { |
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130 LuanTable partTbl = LuanPropertyMeta.INSTANCE.newTable(); |
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131 partTbl.rawPut("filename",filename); |
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132 partTbl.rawPut("content_type",part.getContentType()); |
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133 LuanPropertyMeta.INSTANCE.getters(partTbl).rawPut( "content", new LuanFunction() { |
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134 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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135 try { |
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136 InputStream in = part.getInputStream(); |
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137 byte[] content = Utils.readAll(in); |
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138 in.close(); |
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139 return content; |
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140 } catch(IOException e) { |
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141 throw new RuntimeException(e); |
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142 } |
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143 } |
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144 } ); |
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145 value = partTbl; |
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146 } |
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147 LuanTable list = (LuanTable)parametersTbl.rawGet(name); |
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148 if( list == null ) { |
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149 list = new LuanTable(); |
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150 parametersTbl.rawPut(name,list); |
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151 } |
514 | 152 list.rawPut(parametersTbl.rawLength()+1,value); |
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153 } |
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154 } catch(IOException e) { |
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155 throw new RuntimeException(e); |
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156 } catch(ServletException e) { |
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157 throw new RuntimeException(e); |
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158 } |
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159 } |
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160 |
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161 LuanTable cookieTbl = (LuanTable)requestTbl.rawGet("cookie"); |
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162 for( Cookie cookie : request.getCookies() ) { |
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163 cookieTbl.rawPut( cookie.getName(), unescape(cookie.getValue()) ); |
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164 } |
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165 |
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166 |
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167 // response |
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168 LuanTable responseTbl = new LuanTable(); |
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169 responseTbl.rawPut("java",response); |
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170 LuanFunction newResponseFn = (LuanFunction)module.rawGet("new_response"); |
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171 newResponseFn.call( luan, new Object[]{responseTbl} ); |
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172 module.rawPut("response",responseTbl); |
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173 |
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174 fn.call(luan); |
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175 handle_run_later(luan); |
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176 return true; |
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177 } |
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178 |
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179 public static void setResponse(LuanTable responseTbl,HttpServletResponse response) throws LuanException { |
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180 int status = Luan.asInteger(responseTbl.rawGet("status")); |
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181 response.setStatus(status); |
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182 LuanTable responseHeaders = (LuanTable)responseTbl.rawGet("headers"); |
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183 for( Map.Entry<Object,Object> entry : responseHeaders.rawIterable() ) { |
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184 String name = (String)entry.getKey(); |
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185 name = toHttpHeaderName(name); |
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186 LuanTable values = (LuanTable)entry.getValue(); |
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187 for( Object value : values.asList() ) { |
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188 if( value instanceof String ) { |
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189 response.setHeader(name,(String)value); |
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190 continue; |
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191 } |
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192 Integer i = Luan.asInteger(value); |
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193 if( i != null ) { |
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194 response.setIntHeader(name,i); |
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195 continue; |
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196 } |
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197 throw new IllegalArgumentException("value must be string or integer for headers table"); |
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198 } |
436 | 199 } |
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200 } |
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201 |
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202 |
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203 |
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204 // static utils |
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205 |
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206 public static String toLuanHeaderName(String httpName) { |
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207 return httpName.toLowerCase().replace('-','_'); |
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208 } |
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209 |
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210 public static String toHttpHeaderName(String luanName) { |
723 | 211 /* |
499 | 212 StringBuilder buf = new StringBuilder(); |
213 boolean capitalize = true; | |
214 char[] a = luanName.toCharArray(); | |
215 for( int i=0; i<a.length; i++ ) { | |
216 char c = a[i]; | |
217 if( c == '_' ) { | |
218 a[i] = '-'; | |
219 capitalize = true; | |
220 } else if( capitalize ) { | |
221 a[i] = Character.toUpperCase(c); | |
222 capitalize = false; | |
223 } | |
224 } | |
225 return String.valueOf(a); | |
723 | 226 */ |
227 return LuanUrl.toHttpHeaderName(luanName); | |
499 | 228 } |
229 | |
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230 private static String escape(String value) { |
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231 return value.replaceAll(";", "%3B"); |
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232 } |
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233 |
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234 private static String unescape(String value) { |
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235 return value.replaceAll("%3B", ";"); |
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236 } |
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237 |
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238 private static Cookie getCookie(HttpServletRequest request,String name) { |
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239 Cookie[] cookies = request.getCookies(); |
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240 if( cookies == null ) |
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241 return null; |
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242 for (Cookie cookie : cookies) { |
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243 if (cookie.getName().equals(name)) |
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244 return cookie; |
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245 } |
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246 return null; |
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247 } |
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248 |
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249 public static void setCookie(HttpServletRequest request,HttpServletResponse response,String name,String value,boolean isPersistent, String domain) { |
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250 Cookie cookie = getCookie(request,name); |
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251 if( cookie==null || !cookie.getValue().equals(value) ) { |
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252 cookie = new Cookie(name, escape(value)); |
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253 cookie.setPath("/"); |
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254 if (domain != null && domain.length() > 0) |
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255 cookie.setDomain(domain); |
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256 if( isPersistent ) |
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257 cookie.setMaxAge(10000000); |
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258 response.addCookie(cookie); |
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259 } |
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260 } |
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261 |
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262 public static void removeCookie(HttpServletRequest request, |
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263 HttpServletResponse response, |
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264 String name, |
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265 String domain |
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266 ) { |
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267 Cookie cookie = getCookie(request, name); |
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268 if(cookie != null) { |
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269 Cookie delCookie = new Cookie(name, "delete"); |
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270 delCookie.setPath("/"); |
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271 delCookie.setMaxAge(0); |
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272 if (domain != null && domain.length() > 0) |
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273 delCookie.setDomain(domain); |
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274 response.addCookie(delCookie); |
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275 } |
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276 } |
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277 |
626
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278 |
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279 |
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280 private static String RUN_LATER_KEY = "Http.run_later"; |
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281 private static final Executor exec = Executors.newSingleThreadExecutor(); |
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282 |
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283 public static void run_later(final LuanState luan,final LuanFunction fn,final Object... args) { |
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284 List list = (List)luan.registry().get(RUN_LATER_KEY); |
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285 if( list == null ) { |
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286 list = new ArrayList(); |
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287 luan.registry().put(RUN_LATER_KEY,list); |
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288 } |
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289 list.add( |
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290 new Runnable(){public void run() { |
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291 try { |
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292 fn.call(luan,args); |
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293 } catch(LuanException e) { |
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294 e.printStackTrace(); |
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295 } |
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296 }} |
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297 ); |
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298 } |
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299 |
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300 private static void handle_run_later(LuanState luan) { |
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301 List list = (List)luan.registry().get(RUN_LATER_KEY); |
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302 if( list==null ) |
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303 return; |
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304 for( Object obj : list ) { |
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305 exec.execute((Runnable)obj); |
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306 } |
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307 } |
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308 } |