Mercurial Hosting > luan
annotate src/luan/modules/http/LuanHandler.java @ 1375:5c3702f60200
cleanup
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 11 Jul 2019 23:19:11 -0600 |
parents | ee0f0e6c89a0 |
children | a3d0d1c2ce89 |
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.webserver.Request; |
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17 import luan.lib.webserver.Response; |
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18 import luan.lib.webserver.Status; |
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19 import luan.lib.webserver.Server; |
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20 import luan.lib.webserver.Handler; |
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21 import luan.lib.webserver.ResponseOutputStream; |
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22 import luan.Luan; |
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23 import luan.LuanTable; |
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24 import luan.LuanFunction; |
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25 import luan.LuanJavaFunction; |
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26 import luan.LuanCloner; |
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27 import luan.LuanException; |
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28 import luan.modules.PackageLuan; |
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29 import luan.modules.BasicLuan; |
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30 import luan.modules.logging.LuanLogger; |
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31 |
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32 |
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33 public final class LuanHandler implements Handler, Luan.OnClose { |
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34 private final Luan luanInit; |
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35 private final Logger logger; |
1360 | 36 private final ReadWriteLock rwLock = new ReentrantReadWriteLock(); |
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37 private final List<Reference<Closeable>> onClose = new ArrayList<Reference<Closeable>>(); |
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38 private volatile Luan currentLuan; |
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39 private volatile boolean isDisabled = false; |
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40 |
1186 | 41 private static final Method resetLuanMethod; |
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42 private static final Method evalInRootMethod; |
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43 private static final Method disableLuanMethod; |
1186 | 44 static { |
45 try { | |
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46 resetLuanMethod = LuanHandler.class.getMethod( "reset_luan" ); |
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47 evalInRootMethod = LuanHandler.class.getMethod( "eval_in_root", String.class ); |
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48 disableLuanMethod = LuanHandler.class.getMethod( "disable_luan" ); |
1186 | 49 } catch(NoSuchMethodException e) { |
50 throw new RuntimeException(e); | |
51 } | |
52 } | |
53 | |
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54 public LuanHandler(Luan luanInit) { |
1231 | 55 this.luanInit = luanInit; |
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56 this.logger = LuanLogger.getLogger(luanInit,LuanHandler.class.getName()); |
1186 | 57 try { |
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58 LuanTable Http = (LuanTable)luanInit.require("luan:http/Http.luan"); |
1350 | 59 if( Http.get("reset_luan") == null ) |
60 Http.put( "reset_luan", new LuanJavaFunction(luanInit,resetLuanMethod,this) ); | |
1335 | 61 Http.put( "eval_in_root", new LuanJavaFunction(luanInit,evalInRootMethod,this) ); |
62 Http.put( "disable_luan", new LuanJavaFunction(luanInit,disableLuanMethod,this) ); | |
1186 | 63 } catch(LuanException e) { |
64 throw new RuntimeException(e); | |
65 } | |
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66 currentLuan = newLuan(); |
1186 | 67 } |
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68 |
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69 private Luan newLuan() { |
1335 | 70 Luan luan; |
71 synchronized(luanInit) { | |
72 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); | |
73 luan = (Luan)cloner.clone(luanInit); | |
74 } | |
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75 luan.onClose = this; |
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76 try { |
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77 PackageLuan.load(luan,"site:/init.luan"); |
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78 } catch(LuanException e) { |
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79 //e.printStackTrace(); |
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80 String err = e.getLuanStackTraceString(); |
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81 logger.error(err); |
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82 } |
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83 return luan; |
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84 } |
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85 |
1264 | 86 /* |
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87 public Luan getLuan() { |
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88 return luan; |
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89 } |
1264 | 90 */ |
1160 | 91 @Override public Response handle(Request request) { |
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92 if( isDisabled ) |
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93 return null; |
1167 | 94 if( request.path.endsWith("/") ) |
95 return null; | |
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96 return handle(request,false); |
1167 | 97 } |
98 | |
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99 Response handle(Request request,boolean notFound) { |
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100 Thread thread = Thread.currentThread(); |
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101 String oldName = thread.getName(); |
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102 thread.setName(request.headers.get("host")+request.path); |
1360 | 103 rwLock.readLock().lock(); |
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104 try { |
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105 return service(request,notFound); |
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106 } catch(LuanException e) { |
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107 String err = e.getLuanStackTraceString(); |
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108 logger.error(err+"\n"+request.rawHead.trim()+"\n"); |
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109 String msg = "Internel Server Error\n\n" + err; |
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110 return Response.errorResponse( Status.INTERNAL_SERVER_ERROR, msg ); |
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111 } finally { |
1360 | 112 rwLock.readLock().unlock(); |
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113 thread.setName(oldName); |
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114 } |
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115 } |
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116 |
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117 public void onClose(Closeable c) { |
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118 synchronized(onClose) { |
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119 onClose.add(new WeakReference<Closeable>(c)); |
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120 } |
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121 } |
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122 |
1231 | 123 public void close() { |
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124 synchronized(onClose) { |
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125 for( Reference<Closeable> ref : onClose ) { |
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126 Closeable c = ref.get(); |
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127 if( c != null ) { |
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128 try { |
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129 c.close(); |
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130 } catch(IOException e) { |
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131 logger.error(c.toString(),e); |
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132 } |
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133 } |
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134 } |
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135 onClose.clear(); |
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136 } |
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137 } |
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138 |
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139 public Object call_rpc(String fnName,Object... args) throws LuanException { |
1360 | 140 rwLock.readLock().lock(); |
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141 try { |
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142 LuanFunction fn; |
1335 | 143 synchronized(luanInit) { |
144 enableLoad("luan:Rpc.luan"); | |
145 LuanTable rpc = (LuanTable)currentLuan.require("luan:Rpc.luan"); | |
1267 | 146 LuanTable fns = (LuanTable)rpc.get("functions"); |
147 fn = (LuanFunction)fns.get(fnName); | |
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148 if( fn == null ) |
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149 throw new LuanException( "function not found: " + fnName ); |
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150 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); |
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151 fn = (LuanFunction)cloner.get(fn); |
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152 } |
1335 | 153 return fn.call(args); |
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154 } finally { |
1360 | 155 rwLock.readLock().unlock(); |
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156 } |
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157 } |
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158 |
1186 | 159 public void reset_luan() { |
1360 | 160 new Thread() {public void run(){ |
161 rwLock.writeLock().lock(); | |
162 try { | |
163 close(); | |
164 currentLuan = newLuan(); | |
165 } finally { | |
166 rwLock.writeLock().unlock(); | |
167 } | |
168 }}.start(); | |
1186 | 169 } |
170 | |
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171 public void disable_luan() { |
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172 isDisabled = true; |
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173 } |
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174 |
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175 public void eval_in_root(String text) throws LuanException { |
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176 Luan luan; |
1335 | 177 synchronized(luanInit) { |
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178 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
1335 | 179 luan = (Luan)cloner.clone(currentLuan); |
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180 } |
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181 luan.onClose = this; |
1335 | 182 luan.load(text,"<eval_in_root>",null).call(); |
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183 currentLuan = luan; |
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184 } |
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185 |
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186 public static void start(Server server) throws Exception { |
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187 try { |
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188 server.start(); |
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189 } catch(BindException e) { |
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190 throw new LuanException(e.toString()); |
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191 } |
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192 } |
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193 |
1335 | 194 |
195 | |
196 // from HttpServicer | |
197 | |
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198 private Response service(Request request,boolean notFound) |
1335 | 199 throws LuanException |
200 { | |
201 try { | |
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202 if( !notFound ) |
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203 return serviceLuan(request); |
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204 else |
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205 return serviceNotFound(request); |
1335 | 206 } catch(LuanException e) { |
207 return handleError(request,e); | |
208 } | |
209 } | |
210 | |
211 private Response handleError(Request request,LuanException e) | |
212 throws LuanException | |
213 { | |
214 //e.printStackTrace(); | |
215 Luan luan; | |
216 synchronized(luanInit) { | |
217 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); | |
218 luan = (Luan)cloner.clone(currentLuan); | |
219 } | |
220 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
221 return (Response)module.fn("handle_error").call( request, e.table(luan) ); | |
222 } | |
223 | |
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224 private Response serviceLuan(Request request) |
1335 | 225 throws LuanException |
226 { | |
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227 String modName = "site:" + request.path +".luan"; |
1335 | 228 LuanFunction fn; |
229 Luan luan; | |
230 synchronized(luanInit) { | |
231 enableLoad("luan:http/Http.luan",modName); | |
1359 | 232 currentLuan.require("luan:http/Http.luan"); |
1335 | 233 Object mod = PackageLuan.load(currentLuan,modName); |
234 if( mod.equals(Boolean.FALSE) ) | |
235 return null; | |
236 if( !(mod instanceof LuanFunction) ) | |
237 throw new LuanException( "module '"+modName+"' must return a function" ); | |
238 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); | |
239 luan = (Luan)cloner.clone(currentLuan); | |
240 fn = (LuanFunction)cloner.get(mod); | |
241 } | |
242 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
243 module.fn("new_request").call(request); | |
244 module.fn("new_response").call(); | |
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245 fn.call(); |
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246 return (Response)module.fn("finish").call(); |
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247 } |
1335 | 248 |
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249 private Response serviceNotFound(Request request) |
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250 throws LuanException |
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251 { |
1359 | 252 LuanFunction fn; |
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253 Luan luan; |
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254 synchronized(luanInit) { |
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255 enableLoad("luan:http/Http.luan"); |
1359 | 256 LuanTable module = (LuanTable)currentLuan.require("luan:http/Http.luan"); |
257 fn = module.fn("not_found_handler"); | |
258 if( fn == null ) | |
259 return null; | |
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260 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); |
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261 luan = (Luan)cloner.clone(currentLuan); |
1359 | 262 fn = (LuanFunction)cloner.get(fn); |
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263 } |
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264 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); |
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265 module.fn("new_request").call(request); |
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266 module.fn("new_response").call(); |
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267 Object obj = Luan.first(fn.call()); |
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268 if( !(obj instanceof Boolean) ) |
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269 throw new LuanException("not_found_handler must return boolean"); |
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270 boolean handled = (Boolean)obj; |
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271 return handled ? (Response)module.fn("finish").call() : null; |
1335 | 272 } |
273 | |
274 private void enableLoad(String... mods) throws LuanException { | |
275 LuanTable loaded = PackageLuan.loaded(currentLuan); | |
276 for( String mod : mods ) { | |
277 if( loaded.rawGet(mod) == null ) { | |
278 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); | |
279 currentLuan = (Luan)cloner.clone(currentLuan); | |
280 break; | |
281 } | |
282 } | |
283 } | |
284 | |
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285 } |