Mercurial Hosting > luan
annotate src/luan/modules/http/LuanHandler.java @ 1400:221eedb0f54e
fix inner class gc bug
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Fri, 13 Sep 2019 05:05:51 -0600 |
parents | 0dc9837c16be |
children | ef1620aa99cb |
rev | line source |
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1171 | 1 package luan.modules.http; |
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2 |
1231 | 3 import java.io.Closeable; |
1160 | 4 import java.io.Writer; |
5 import java.io.PrintWriter; | |
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6 import java.io.IOException; |
1264 | 7 import java.lang.ref.Reference; |
8 import java.lang.ref.WeakReference; | |
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9 import java.lang.reflect.Method; |
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10 import java.net.BindException; |
1264 | 11 import java.util.List; |
12 import java.util.ArrayList; | |
13 import java.util.concurrent.locks.ReadWriteLock; | |
14 import java.util.concurrent.locks.ReentrantReadWriteLock; | |
1337 | 15 import luan.lib.logging.Logger; |
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16 import luan.lib.logging.LoggerFactory; |
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17 import luan.lib.webserver.Request; |
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18 import luan.lib.webserver.Response; |
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19 import luan.lib.webserver.Status; |
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20 import luan.lib.webserver.Server; |
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21 import luan.lib.webserver.Handler; |
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22 import luan.lib.webserver.ResponseOutputStream; |
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23 import luan.Luan; |
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24 import luan.LuanTable; |
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25 import luan.LuanFunction; |
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26 import luan.LuanJavaFunction; |
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27 import luan.LuanCloner; |
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28 import luan.LuanException; |
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29 import luan.modules.PackageLuan; |
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30 import luan.modules.BasicLuan; |
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31 import luan.modules.logging.LuanLogger; |
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32 |
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33 |
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34 public final class LuanHandler implements Handler, Luan.OnClose { |
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35 private static final Logger sysLogger = LoggerFactory.getLogger(LuanHandler.class); |
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36 |
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37 private final Luan luanInit; |
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38 private final String domain; |
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39 private final Logger luanLogger; |
1360 | 40 private final ReadWriteLock rwLock = new ReentrantReadWriteLock(); |
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41 private final List<Reference<Closeable>> onClose = new ArrayList<Reference<Closeable>>(); |
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42 private volatile Luan currentLuan; |
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43 private volatile boolean isDisabled = false; |
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44 |
1186 | 45 private static final Method resetLuanMethod; |
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46 private static final Method evalInRootMethod; |
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47 private static final Method disableLuanMethod; |
1186 | 48 static { |
49 try { | |
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50 resetLuanMethod = LuanHandler.class.getMethod( "reset_luan" ); |
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51 evalInRootMethod = LuanHandler.class.getMethod( "eval_in_root", String.class ); |
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52 disableLuanMethod = LuanHandler.class.getMethod( "disable_luan" ); |
1186 | 53 } catch(NoSuchMethodException e) { |
54 throw new RuntimeException(e); | |
55 } | |
56 } | |
57 | |
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58 public LuanHandler(Luan luanInit,String domain) { |
1231 | 59 this.luanInit = luanInit; |
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60 this.domain = domain; |
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61 this.luanLogger = luanInit.getLogger(LuanHandler.class); |
1186 | 62 try { |
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63 LuanTable Http = (LuanTable)luanInit.require("luan:http/Http.luan"); |
1350 | 64 if( Http.get("reset_luan") == null ) |
65 Http.put( "reset_luan", new LuanJavaFunction(luanInit,resetLuanMethod,this) ); | |
1335 | 66 Http.put( "eval_in_root", new LuanJavaFunction(luanInit,evalInRootMethod,this) ); |
67 Http.put( "disable_luan", new LuanJavaFunction(luanInit,disableLuanMethod,this) ); | |
1186 | 68 } catch(LuanException e) { |
69 throw new RuntimeException(e); | |
70 } | |
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71 currentLuan = newLuan(); |
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72 sysLogger.info("new "+domain); |
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73 } |
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74 |
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75 protected void finalize() throws Throwable { |
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76 sysLogger.info("gc "+domain); |
1186 | 77 } |
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78 |
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79 private Luan newLuan() { |
1335 | 80 Luan luan; |
81 synchronized(luanInit) { | |
82 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); | |
83 luan = (Luan)cloner.clone(luanInit); | |
84 } | |
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85 luan.onClose = this; |
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86 try { |
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87 PackageLuan.load(luan,"site:/init.luan"); |
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88 } catch(LuanException e) { |
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89 //e.printStackTrace(); |
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90 String err = e.getLuanStackTraceString(); |
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91 luanLogger.error(err); |
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92 } |
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93 return luan; |
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94 } |
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95 |
1264 | 96 /* |
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97 public Luan getLuan() { |
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98 return luan; |
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99 } |
1264 | 100 */ |
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101 static final String NOT_FOUND = "luan-not-found"; |
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102 |
1160 | 103 @Override public Response handle(Request request) { |
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104 if( isDisabled ) |
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105 return null; |
1167 | 106 if( request.path.endsWith("/") ) |
107 return null; | |
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108 return handle( request, request.headers.containsKey(NOT_FOUND) ); |
1167 | 109 } |
110 | |
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111 private Response handle(Request request,boolean notFound) { |
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112 Thread thread = Thread.currentThread(); |
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113 String oldName = thread.getName(); |
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114 thread.setName(request.headers.get("host")+request.path); |
1360 | 115 rwLock.readLock().lock(); |
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116 try { |
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117 return service(request,notFound); |
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118 } catch(LuanException e) { |
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119 String err = e.getLuanStackTraceString(); |
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120 luanLogger.error(err+"\n"+request.rawHead.trim()+"\n"); |
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121 String msg = "Internel Server Error\n\n" + err; |
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122 return Response.errorResponse( Status.INTERNAL_SERVER_ERROR, msg ); |
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123 } finally { |
1360 | 124 rwLock.readLock().unlock(); |
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125 thread.setName(oldName); |
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126 } |
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127 } |
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128 |
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129 public void onClose(Closeable c) { |
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130 synchronized(onClose) { |
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131 onClose.add(new WeakReference<Closeable>(c)); |
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132 } |
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133 } |
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134 |
1231 | 135 public void close() { |
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136 synchronized(onClose) { |
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137 for( Reference<Closeable> ref : onClose ) { |
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138 Closeable c = ref.get(); |
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139 if( c != null ) { |
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140 try { |
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141 c.close(); |
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142 } catch(IOException e) { |
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143 luanLogger.error(c.toString(),e); |
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144 } |
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145 } |
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146 } |
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147 onClose.clear(); |
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148 } |
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149 } |
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150 |
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151 public Object call_rpc(String fnName,Object... args) throws LuanException { |
1360 | 152 rwLock.readLock().lock(); |
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153 try { |
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154 LuanFunction fn; |
1335 | 155 synchronized(luanInit) { |
156 enableLoad("luan:Rpc.luan"); | |
157 LuanTable rpc = (LuanTable)currentLuan.require("luan:Rpc.luan"); | |
1267 | 158 LuanTable fns = (LuanTable)rpc.get("functions"); |
159 fn = (LuanFunction)fns.get(fnName); | |
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160 if( fn == null ) |
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161 throw new LuanException( "function not found: " + fnName ); |
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162 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); |
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163 fn = (LuanFunction)cloner.get(fn); |
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164 } |
1335 | 165 return fn.call(args); |
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166 } finally { |
1360 | 167 rwLock.readLock().unlock(); |
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168 } |
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169 } |
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170 |
1186 | 171 public void reset_luan() { |
1360 | 172 new Thread() {public void run(){ |
173 rwLock.writeLock().lock(); | |
174 try { | |
175 close(); | |
176 currentLuan = newLuan(); | |
177 } finally { | |
178 rwLock.writeLock().unlock(); | |
179 } | |
180 }}.start(); | |
1186 | 181 } |
182 | |
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183 public void disable_luan() { |
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184 isDisabled = true; |
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185 } |
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186 |
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187 public void eval_in_root(String text) throws LuanException { |
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188 Luan luan; |
1335 | 189 synchronized(luanInit) { |
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190 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
1335 | 191 luan = (Luan)cloner.clone(currentLuan); |
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192 } |
1397 | 193 luan.load(text,"<eval_in_root>",null).call(); |
194 currentLuan.onClose = null; | |
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195 luan.onClose = this; |
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196 currentLuan = luan; |
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197 } |
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198 |
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199 public static void start(Server server) throws Exception { |
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200 try { |
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201 server.start(); |
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202 } catch(BindException e) { |
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203 throw new LuanException(e.toString()); |
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204 } |
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205 } |
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206 |
1335 | 207 |
208 | |
209 // from HttpServicer | |
210 | |
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211 private Response service(Request request,boolean notFound) |
1335 | 212 throws LuanException |
213 { | |
214 try { | |
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215 if( !notFound ) |
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216 return serviceLuan(request); |
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217 else |
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218 return serviceNotFound(request); |
1335 | 219 } catch(LuanException e) { |
220 return handleError(request,e); | |
221 } | |
222 } | |
223 | |
224 private Response handleError(Request request,LuanException e) | |
225 throws LuanException | |
226 { | |
227 //e.printStackTrace(); | |
228 Luan luan; | |
229 synchronized(luanInit) { | |
230 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); | |
231 luan = (Luan)cloner.clone(currentLuan); | |
232 } | |
233 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
234 return (Response)module.fn("handle_error").call( request, e.table(luan) ); | |
235 } | |
236 | |
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237 private Response serviceLuan(Request request) |
1335 | 238 throws LuanException |
239 { | |
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240 String modName = "site:" + request.path +".luan"; |
1335 | 241 LuanFunction fn; |
242 Luan luan; | |
243 synchronized(luanInit) { | |
244 enableLoad("luan:http/Http.luan",modName); | |
1359 | 245 currentLuan.require("luan:http/Http.luan"); |
1335 | 246 Object mod = PackageLuan.load(currentLuan,modName); |
247 if( mod.equals(Boolean.FALSE) ) | |
248 return null; | |
249 if( !(mod instanceof LuanFunction) ) | |
250 throw new LuanException( "module '"+modName+"' must return a function" ); | |
251 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); | |
252 luan = (Luan)cloner.clone(currentLuan); | |
253 fn = (LuanFunction)cloner.get(mod); | |
254 } | |
255 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
256 module.fn("new_request").call(request); | |
257 module.fn("new_response").call(); | |
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258 fn.call(); |
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259 return (Response)module.fn("finish").call(); |
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260 } |
1335 | 261 |
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262 private Response serviceNotFound(Request request) |
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263 throws LuanException |
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264 { |
1359 | 265 LuanFunction fn; |
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266 Luan luan; |
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267 synchronized(luanInit) { |
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268 enableLoad("luan:http/Http.luan"); |
1359 | 269 LuanTable module = (LuanTable)currentLuan.require("luan:http/Http.luan"); |
270 fn = module.fn("not_found_handler"); | |
271 if( fn == null ) | |
272 return null; | |
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273 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); |
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274 luan = (Luan)cloner.clone(currentLuan); |
1359 | 275 fn = (LuanFunction)cloner.get(fn); |
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276 } |
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277 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); |
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278 module.fn("new_request").call(request); |
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279 module.fn("new_response").call(); |
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280 Object obj = Luan.first(fn.call()); |
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281 if( !(obj instanceof Boolean) ) |
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282 throw new LuanException("not_found_handler must return boolean"); |
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283 boolean handled = (Boolean)obj; |
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284 return handled ? (Response)module.fn("finish").call() : null; |
1335 | 285 } |
286 | |
287 private void enableLoad(String... mods) throws LuanException { | |
288 LuanTable loaded = PackageLuan.loaded(currentLuan); | |
289 for( String mod : mods ) { | |
290 if( loaded.rawGet(mod) == null ) { | |
291 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); | |
1397 | 292 currentLuan.onClose = null; |
1335 | 293 currentLuan = (Luan)cloner.clone(currentLuan); |
1397 | 294 currentLuan.onClose = this; |
1335 | 295 break; |
296 } | |
297 } | |
298 } | |
299 | |
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300 } |