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annotate src/luan/modules/http/HttpServicer.java @ 787:c49980cdece6

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use incremental cloning to serve web pages
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 04 Sep 2016 00:18:00 -0600
parents d69d3c51c44e
children 60661a8e738c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2b9bc97f0439 change luan:web to luan:http
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diff changeset
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;
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23 import org.slf4j.Logger;
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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;
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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 {
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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();
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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);
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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 */
362
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125 Object value;
361
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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 }
357
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143 }
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144 } );
362
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145 value = partTbl;
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146 }
497
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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 }
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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);
357
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158 }
361
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159 }
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160
497
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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
498
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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} );
498
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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);
497
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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);
498
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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;
223
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191 }
498
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192 Integer i = Luan.asInteger(value);
223
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193 if( i != null ) {
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194 response.setIntHeader(name,i);
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195 continue;
223
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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 }
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199 }
217
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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
500
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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) {
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211 /*
499
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212 StringBuilder buf = new StringBuilder();
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213 boolean capitalize = true;
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214 char[] a = luanName.toCharArray();
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215 for( int i=0; i<a.length; i++ ) {
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216 char c = a[i];
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217 if( c == '_' ) {
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218 a[i] = '-';
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219 capitalize = true;
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220 } else if( capitalize ) {
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221 a[i] = Character.toUpperCase(c);
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222 capitalize = false;
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223 }
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224 }
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225 return String.valueOf(a);
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226 */
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227 return LuanUrl.toHttpHeaderName(luanName);
499
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228 }
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229
89
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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 }