Mercurial Hosting > luan
annotate src/luan/modules/http/LuanHandler.java @ 1643:8d751af51b9d
fix not_found_hander
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 02 Jan 2022 00:42:58 -0700 |
parents | a37ffe2d1b14 |
children | 5c676385284b |
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; | |
1401 | 13 import java.util.Set; |
14 import java.util.Collections; | |
15 import java.util.concurrent.ConcurrentHashMap; | |
1264 | 16 import java.util.concurrent.locks.ReadWriteLock; |
17 import java.util.concurrent.locks.ReentrantReadWriteLock; | |
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18 import goodjava.logging.Logger; |
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19 import goodjava.logging.LoggerFactory; |
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20 import goodjava.webserver.Request; |
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21 import goodjava.webserver.Response; |
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22 import goodjava.webserver.Status; |
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23 import goodjava.webserver.Server; |
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24 import goodjava.webserver.Handler; |
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25 import goodjava.webserver.ResponseOutputStream; |
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26 import luan.Luan; |
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27 import luan.LuanTable; |
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28 import luan.LuanFunction; |
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29 import luan.LuanJavaFunction; |
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30 import luan.LuanException; |
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31 import luan.modules.PackageLuan; |
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32 import luan.modules.BasicLuan; |
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33 import luan.modules.logging.LuanLogger; |
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34 |
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35 |
1401 | 36 public final class LuanHandler implements Handler, Closeable { |
1454 | 37 private static final Logger logger = LoggerFactory.getLogger(LuanHandler.class); |
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38 |
1401 | 39 private static final Set<LuanHandler> dontGc = Collections.newSetFromMap(new ConcurrentHashMap<LuanHandler,Boolean>()); |
40 | |
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41 private final Luan luanInit; |
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42 private final String domain; |
1360 | 43 private final ReadWriteLock rwLock = new ReentrantReadWriteLock(); |
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44 private volatile Luan currentLuan; |
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45 private volatile boolean isDisabled = false; |
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46 private volatile boolean didInit; |
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47 |
1186 | 48 private static final Method resetLuanMethod; |
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49 private static final Method evalInRootMethod; |
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50 private static final Method disableLuanMethod; |
1401 | 51 private static final Method dontGcMethod; |
1186 | 52 static { |
53 try { | |
1401 | 54 resetLuanMethod = LuanHandler.Fns.class.getMethod( "reset_luan" ); |
55 evalInRootMethod = LuanHandler.Fns.class.getMethod( "eval_in_root", String.class ); | |
56 disableLuanMethod = LuanHandler.Fns.class.getMethod( "disable_luan" ); | |
57 dontGcMethod = LuanHandler.Fns.class.getMethod( "dont_gc" ); | |
1186 | 58 } catch(NoSuchMethodException e) { |
59 throw new RuntimeException(e); | |
60 } | |
61 } | |
62 | |
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63 public LuanHandler(Luan luanInit,String domain) { |
1231 | 64 this.luanInit = luanInit; |
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65 this.domain = domain; |
1186 | 66 try { |
1401 | 67 Fns fns = new Fns(this); |
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68 LuanTable Http = (LuanTable)luanInit.require("luan:http/Http.luan"); |
1562 | 69 if( Http.get(luanInit,"reset_luan") == null ) |
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70 Http.put( luanInit, "reset_luan", new LuanJavaFunction(resetLuanMethod,fns) ); |
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71 Http.put( luanInit, "eval_in_root", new LuanJavaFunction(evalInRootMethod,fns) ); |
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72 Http.put( luanInit, "disable_luan", new LuanJavaFunction(disableLuanMethod,fns) ); |
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73 Http.put( luanInit, "dont_gc", new LuanJavaFunction(dontGcMethod,fns) ); |
1186 | 74 } catch(LuanException e) { |
75 throw new RuntimeException(e); | |
76 } | |
1411 | 77 if( domain != null ) |
1454 | 78 logger.info("new "+domain); |
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79 newLuan(); |
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80 } |
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81 |
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82 protected void finalize() throws Throwable { |
1411 | 83 if( domain != null ) |
1454 | 84 logger.info("gc "+domain); |
1186 | 85 } |
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86 |
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87 private void init(Luan luan) throws LuanException { |
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88 if( didInit ) |
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89 return; |
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90 PackageLuan.load(luan,"site:/init.luan",null); |
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91 didInit = true; |
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92 } |
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93 |
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94 private void newLuan() { |
1335 | 95 Luan luan; |
96 synchronized(luanInit) { | |
1578 | 97 luan = new Luan(luanInit); |
1335 | 98 } |
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99 didInit = false; |
1454 | 100 LuanLogger.startThreadLogging(luan); |
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101 try { |
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102 init(luan); |
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103 } catch(LuanException e) { |
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104 //e.printStackTrace(); |
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105 String err = e.getLuanStackTraceString(); |
1454 | 106 logger.error(err); |
107 } finally { | |
108 LuanLogger.endThreadLogging(); | |
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109 } |
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110 currentLuan = luan; |
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111 } |
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112 |
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113 static final String NOT_FOUND = "luan-not-found"; |
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114 |
1160 | 115 @Override public Response handle(Request request) { |
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116 if( isDisabled ) |
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117 return null; |
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118 boolean notFound = request.headers.containsKey(NOT_FOUND); |
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119 if( !notFound && request.path.endsWith("/") ) |
1167 | 120 return null; |
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121 return handle( request, notFound ); |
1167 | 122 } |
123 | |
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124 private Response handle(Request request,boolean notFound) { |
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125 Thread thread = Thread.currentThread(); |
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126 String oldName = thread.getName(); |
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127 thread.setName(request.headers.get("host")+request.path); |
1360 | 128 rwLock.readLock().lock(); |
1454 | 129 LuanLogger.startThreadLogging(currentLuan); |
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130 try { |
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131 init(currentLuan); |
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132 return service(request,notFound); |
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133 } catch(LuanException e) { |
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134 String err = e.getLuanStackTraceString(); |
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135 //System.err.println(err); |
1454 | 136 logger.error(err+"\n"+request.rawHead.trim()+"\n"); |
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137 String msg = "Internel Server Error\n\n" + err; |
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138 return Response.errorResponse( Status.INTERNAL_SERVER_ERROR, msg ); |
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139 } finally { |
1454 | 140 LuanLogger.endThreadLogging(); |
1360 | 141 rwLock.readLock().unlock(); |
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142 thread.setName(oldName); |
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143 } |
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144 } |
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145 |
1231 | 146 public void close() { |
1401 | 147 Object obj = dontGc.remove(this); |
1454 | 148 //logger.info("close "+domain+" "+(obj!=null)); |
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149 } |
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150 |
1578 | 151 public Object call_rpc(String fnName,Object... args) throws LuanException { |
1360 | 152 rwLock.readLock().lock(); |
1454 | 153 LuanLogger.startThreadLogging(currentLuan); |
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154 try { |
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155 LuanFunction fn; |
1578 | 156 Luan luan; |
157 synchronized(currentLuan) { | |
1335 | 158 LuanTable rpc = (LuanTable)currentLuan.require("luan:Rpc.luan"); |
1578 | 159 LuanTable fns = (LuanTable)rpc.get(currentLuan,"functions"); |
160 fn = (LuanFunction)fns.get(currentLuan,fnName); | |
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161 if( fn == null ) |
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162 throw new LuanException( "function not found: " + fnName ); |
1578 | 163 luan = new Luan(currentLuan); |
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164 } |
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165 return fn.call(luan,args); |
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166 } finally { |
1454 | 167 LuanLogger.endThreadLogging(); |
1360 | 168 rwLock.readLock().unlock(); |
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169 } |
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170 } |
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171 |
1401 | 172 public static void start(Server server) throws Exception { |
173 try { | |
174 server.start(); | |
175 } catch(BindException e) { | |
176 throw new LuanException(e.toString()); | |
177 } | |
178 } | |
179 | |
180 private void reset_luan() { | |
1360 | 181 new Thread() {public void run(){ |
182 rwLock.writeLock().lock(); | |
183 try { | |
184 close(); | |
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185 newLuan(); |
1360 | 186 } finally { |
187 rwLock.writeLock().unlock(); | |
188 } | |
189 }}.start(); | |
1186 | 190 } |
191 | |
1401 | 192 private void disable_luan() { |
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193 isDisabled = true; |
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194 } |
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195 |
1401 | 196 private void eval_in_root(String text) throws LuanException { |
1578 | 197 synchronized(currentLuan) { |
198 currentLuan.load(text,"<eval_in_root>",false,null).call(currentLuan); | |
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199 } |
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200 } |
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201 |
1401 | 202 private void dont_gc() { |
203 dontGc.add(this); | |
1454 | 204 //logger.info("dont_gc "+domain); |
1401 | 205 } |
206 | |
207 public static final class Fns { | |
208 private final Reference<LuanHandler> ref; | |
209 | |
210 private Fns(LuanHandler lh) { | |
211 this.ref = new WeakReference<LuanHandler>(lh); | |
212 } | |
213 | |
214 private LuanHandler lh() throws LuanException { | |
215 LuanHandler lh = ref.get(); | |
216 if( lh == null ) | |
217 throw new LuanException("HTTP handler has been garbage collected"); | |
218 return lh; | |
219 } | |
220 | |
221 public void reset_luan() throws LuanException { | |
222 lh().reset_luan(); | |
223 } | |
224 | |
225 public void disable_luan() throws LuanException { | |
226 lh().disable_luan(); | |
227 } | |
228 | |
229 public void eval_in_root(String text) throws LuanException { | |
230 lh().eval_in_root(text); | |
231 } | |
232 | |
233 public void dont_gc() throws LuanException { | |
234 lh().dont_gc(); | |
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235 } |
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236 } |
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237 |
1335 | 238 |
239 // from HttpServicer | |
240 | |
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241 private Response service(Request request,boolean notFound) |
1335 | 242 throws LuanException |
243 { | |
244 try { | |
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245 if( !notFound ) |
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246 return serviceLuan(request); |
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247 else |
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248 return serviceNotFound(request); |
1335 | 249 } catch(LuanException e) { |
250 return handleError(request,e); | |
251 } | |
252 } | |
253 | |
254 private Response handleError(Request request,LuanException e) | |
255 throws LuanException | |
256 { | |
1578 | 257 //e.printStackTrace(); |
1335 | 258 Luan luan; |
1578 | 259 synchronized(currentLuan) { |
260 luan = new Luan(currentLuan); | |
1335 | 261 } |
262 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
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263 return (Response)module.fn(luan,"handle_error").call( luan, request, e.table(luan) ); |
1335 | 264 } |
265 | |
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266 private Response serviceLuan(Request request) |
1335 | 267 throws LuanException |
268 { | |
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269 String modName = "site:" + request.path +".luan"; |
1335 | 270 LuanFunction fn; |
271 Luan luan; | |
1578 | 272 synchronized(currentLuan) { |
1359 | 273 currentLuan.require("luan:http/Http.luan"); |
1580 | 274 Object mod = PackageLuan.load(currentLuan,modName,null); |
1335 | 275 if( mod.equals(Boolean.FALSE) ) |
276 return null; | |
277 if( !(mod instanceof LuanFunction) ) | |
278 throw new LuanException( "module '"+modName+"' must return a function" ); | |
1578 | 279 luan = new Luan(currentLuan); |
280 fn = (LuanFunction)mod; | |
1335 | 281 } |
282 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
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283 module.fn(luan,"new_request").call(luan,request); |
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284 module.fn(luan,"new_response").call(luan); |
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285 fn.call(luan); |
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286 return (Response)module.fn(luan,"finish").call(luan); |
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287 } |
1335 | 288 |
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289 private Response serviceNotFound(Request request) |
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290 throws LuanException |
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291 { |
1359 | 292 LuanFunction fn; |
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293 Luan luan; |
1578 | 294 synchronized(currentLuan) { |
1359 | 295 LuanTable module = (LuanTable)currentLuan.require("luan:http/Http.luan"); |
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296 fn = module.fn(currentLuan,"not_found_handler"); |
1359 | 297 if( fn == null ) |
298 return null; | |
1578 | 299 luan = new Luan(currentLuan); |
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300 } |
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301 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); |
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302 module.fn(luan,"new_request").call(luan,request); |
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303 module.fn(luan,"new_response").call(luan); |
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304 Object obj = Luan.first(fn.call(luan)); |
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305 if( !(obj instanceof Boolean) ) |
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306 throw new LuanException("not_found_handler must return boolean"); |
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307 boolean handled = (Boolean)obj; |
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308 return handled ? (Response)module.fn(luan,"finish").call(luan) : null; |
1335 | 309 } |
310 | |
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311 } |