Mercurial Hosting > luan
annotate src/luan/modules/http/LuanHandler.java @ 1754:d179810c6148
add url get_content_type
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sat, 04 Feb 2023 22:53:05 -0700 |
parents | d6ec67fa4a61 |
children | 8df0b80e715e |
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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; |
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52 private static final Method testAsInitMethod; |
1186 | 53 static { |
54 try { | |
1401 | 55 resetLuanMethod = LuanHandler.Fns.class.getMethod( "reset_luan" ); |
56 evalInRootMethod = LuanHandler.Fns.class.getMethod( "eval_in_root", String.class ); | |
57 disableLuanMethod = LuanHandler.Fns.class.getMethod( "disable_luan" ); | |
58 dontGcMethod = LuanHandler.Fns.class.getMethod( "dont_gc" ); | |
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59 testAsInitMethod = LuanHandler.Fns.class.getMethod( "test_as_init", String.class, String.class ); |
1186 | 60 } catch(NoSuchMethodException e) { |
61 throw new RuntimeException(e); | |
62 } | |
63 } | |
64 | |
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65 public LuanHandler(Luan luanInit,String domain) { |
1231 | 66 this.luanInit = luanInit; |
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67 this.domain = domain; |
1186 | 68 try { |
1401 | 69 Fns fns = new Fns(this); |
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70 LuanTable Http = (LuanTable)luanInit.require("luan:http/Http.luan"); |
1562 | 71 if( Http.get(luanInit,"reset_luan") == null ) |
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72 Http.put( luanInit, "reset_luan", new LuanJavaFunction(resetLuanMethod,fns) ); |
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73 Http.put( luanInit, "eval_in_root", new LuanJavaFunction(evalInRootMethod,fns) ); |
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74 Http.put( luanInit, "disable_luan", new LuanJavaFunction(disableLuanMethod,fns) ); |
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75 Http.put( luanInit, "dont_gc", new LuanJavaFunction(dontGcMethod,fns) ); |
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76 Http.put( luanInit, "test_as_init", new LuanJavaFunction(testAsInitMethod,fns) ); |
1186 | 77 } catch(LuanException e) { |
78 throw new RuntimeException(e); | |
79 } | |
1411 | 80 if( domain != null ) |
1454 | 81 logger.info("new "+domain); |
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82 newLuan(); |
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83 } |
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84 |
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85 protected void finalize() throws Throwable { |
1411 | 86 if( domain != null ) |
1454 | 87 logger.info("gc "+domain); |
1186 | 88 } |
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89 |
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90 private void init(Luan luan) throws LuanException { |
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91 if( didInit ) |
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92 return; |
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93 PackageLuan.load(luan,"site:/init.luan",null); |
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94 didInit = true; |
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95 } |
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96 |
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97 private void newLuan() { |
1335 | 98 Luan luan; |
99 synchronized(luanInit) { | |
1578 | 100 luan = new Luan(luanInit); |
1335 | 101 } |
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102 didInit = false; |
1454 | 103 LuanLogger.startThreadLogging(luan); |
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104 try { |
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105 init(luan); |
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106 } catch(LuanException e) { |
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107 //e.printStackTrace(); |
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108 String err = e.getLuanStackTraceString(); |
1454 | 109 logger.error(err); |
110 } finally { | |
111 LuanLogger.endThreadLogging(); | |
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112 } |
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113 currentLuan = luan; |
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114 } |
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115 |
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116 static final String NOT_FOUND = "luan-not-found"; |
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117 |
1160 | 118 @Override public Response handle(Request request) { |
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119 if( isDisabled ) |
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120 return null; |
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121 boolean notFound = request.headers.containsKey(NOT_FOUND); |
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122 if( !notFound && request.path.endsWith("/") ) |
1167 | 123 return null; |
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124 return handle( request, notFound ); |
1167 | 125 } |
126 | |
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127 private Response handle(Request request,boolean notFound) { |
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128 Thread thread = Thread.currentThread(); |
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129 String oldName = thread.getName(); |
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130 thread.setName(request.headers.get("host")+request.path); |
1360 | 131 rwLock.readLock().lock(); |
1454 | 132 LuanLogger.startThreadLogging(currentLuan); |
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133 try { |
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134 init(currentLuan); |
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135 return service(request,notFound); |
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136 } catch(LuanException e) { |
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137 String err = e.getLuanStackTraceString(); |
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138 //System.err.println(err); |
1454 | 139 logger.error(err+"\n"+request.rawHead.trim()+"\n"); |
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140 String msg = "Internel Server Error\n\n" + err; |
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141 return Response.errorResponse( Status.INTERNAL_SERVER_ERROR, msg ); |
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142 } finally { |
1454 | 143 LuanLogger.endThreadLogging(); |
1360 | 144 rwLock.readLock().unlock(); |
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145 thread.setName(oldName); |
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146 } |
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147 } |
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148 |
1231 | 149 public void close() { |
1401 | 150 Object obj = dontGc.remove(this); |
1454 | 151 //logger.info("close "+domain+" "+(obj!=null)); |
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152 } |
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153 |
1578 | 154 public Object call_rpc(String fnName,Object... args) throws LuanException { |
1360 | 155 rwLock.readLock().lock(); |
1454 | 156 LuanLogger.startThreadLogging(currentLuan); |
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157 try { |
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158 LuanFunction fn; |
1578 | 159 Luan luan; |
160 synchronized(currentLuan) { | |
1335 | 161 LuanTable rpc = (LuanTable)currentLuan.require("luan:Rpc.luan"); |
1578 | 162 LuanTable fns = (LuanTable)rpc.get(currentLuan,"functions"); |
163 fn = (LuanFunction)fns.get(currentLuan,fnName); | |
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164 if( fn == null ) |
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165 throw new LuanException( "function not found: " + fnName ); |
1578 | 166 luan = new Luan(currentLuan); |
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167 } |
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168 return fn.call(luan,args); |
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169 } finally { |
1454 | 170 LuanLogger.endThreadLogging(); |
1360 | 171 rwLock.readLock().unlock(); |
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172 } |
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173 } |
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174 |
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175 private void test_as_init(String text,String sourceName) throws LuanException { |
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176 Luan luan; |
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177 synchronized(luanInit) { |
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178 luan = new Luan(luanInit); |
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179 } |
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180 LuanLogger.startThreadLogging(luan); |
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181 try { |
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182 luan.load(text,sourceName,false,null).call(luan); |
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183 } finally { |
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184 LuanLogger.endThreadLogging(); |
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185 } |
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186 } |
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187 |
1401 | 188 public static void start(Server server) throws Exception { |
189 try { | |
190 server.start(); | |
191 } catch(BindException e) { | |
192 throw new LuanException(e.toString()); | |
193 } | |
194 } | |
195 | |
196 private void reset_luan() { | |
1360 | 197 new Thread() {public void run(){ |
198 rwLock.writeLock().lock(); | |
199 try { | |
200 close(); | |
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201 newLuan(); |
1360 | 202 } finally { |
203 rwLock.writeLock().unlock(); | |
204 } | |
205 }}.start(); | |
1186 | 206 } |
207 | |
1401 | 208 private void disable_luan() { |
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209 isDisabled = true; |
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210 } |
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211 |
1401 | 212 private void eval_in_root(String text) throws LuanException { |
1578 | 213 synchronized(currentLuan) { |
214 currentLuan.load(text,"<eval_in_root>",false,null).call(currentLuan); | |
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215 } |
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216 } |
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217 |
1401 | 218 private void dont_gc() { |
219 dontGc.add(this); | |
1454 | 220 //logger.info("dont_gc "+domain); |
1401 | 221 } |
222 | |
223 public static final class Fns { | |
224 private final Reference<LuanHandler> ref; | |
225 | |
226 private Fns(LuanHandler lh) { | |
227 this.ref = new WeakReference<LuanHandler>(lh); | |
228 } | |
229 | |
230 private LuanHandler lh() throws LuanException { | |
231 LuanHandler lh = ref.get(); | |
232 if( lh == null ) | |
233 throw new LuanException("HTTP handler has been garbage collected"); | |
234 return lh; | |
235 } | |
236 | |
237 public void reset_luan() throws LuanException { | |
238 lh().reset_luan(); | |
239 } | |
240 | |
241 public void disable_luan() throws LuanException { | |
242 lh().disable_luan(); | |
243 } | |
244 | |
245 public void eval_in_root(String text) throws LuanException { | |
246 lh().eval_in_root(text); | |
247 } | |
248 | |
249 public void dont_gc() throws LuanException { | |
250 lh().dont_gc(); | |
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251 } |
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252 |
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253 public void test_as_init(String text,String sourceName) throws LuanException { |
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254 lh().test_as_init(text,sourceName); |
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255 } |
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256 } |
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257 |
1335 | 258 |
259 // from HttpServicer | |
260 | |
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261 private Response service(Request request,boolean notFound) |
1335 | 262 throws LuanException |
263 { | |
264 try { | |
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265 if( !notFound ) |
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266 return serviceLuan(request); |
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267 else |
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268 return serviceNotFound(request); |
1335 | 269 } catch(LuanException e) { |
270 return handleError(request,e); | |
271 } | |
272 } | |
273 | |
274 private Response handleError(Request request,LuanException e) | |
275 throws LuanException | |
276 { | |
1578 | 277 //e.printStackTrace(); |
1335 | 278 Luan luan; |
1578 | 279 synchronized(currentLuan) { |
280 luan = new Luan(currentLuan); | |
1335 | 281 } |
282 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
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283 return (Response)module.fn(luan,"handle_error").call( luan, request, e.table(luan) ); |
1335 | 284 } |
285 | |
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286 private Response serviceLuan(Request request) |
1335 | 287 throws LuanException |
288 { | |
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289 String modName = "site:" + request.path +".luan"; |
1335 | 290 LuanFunction fn; |
291 Luan luan; | |
1578 | 292 synchronized(currentLuan) { |
1644 | 293 currentLuan.require("luan:http/Http.luan"); |
1580 | 294 Object mod = PackageLuan.load(currentLuan,modName,null); |
1335 | 295 if( mod.equals(Boolean.FALSE) ) |
296 return null; | |
297 if( !(mod instanceof LuanFunction) ) | |
298 throw new LuanException( "module '"+modName+"' must return a function" ); | |
1578 | 299 luan = new Luan(currentLuan); |
300 fn = (LuanFunction)mod; | |
1335 | 301 } |
302 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
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303 module.fn(luan,"new_request").call(luan,request); |
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304 module.fn(luan,"new_response").call(luan); |
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305 fn.call(luan); |
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306 return (Response)module.fn(luan,"finish").call(luan); |
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307 } |
1335 | 308 |
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309 private Response serviceNotFound(Request request) |
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310 throws LuanException |
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311 { |
1359 | 312 LuanFunction fn; |
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313 Luan luan; |
1578 | 314 synchronized(currentLuan) { |
1359 | 315 LuanTable module = (LuanTable)currentLuan.require("luan:http/Http.luan"); |
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316 fn = module.fn(currentLuan,"not_found_handler"); |
1359 | 317 if( fn == null ) |
318 return null; | |
1578 | 319 luan = new Luan(currentLuan); |
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320 } |
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321 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); |
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322 module.fn(luan,"new_request").call(luan,request); |
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323 module.fn(luan,"new_response").call(luan); |
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324 Object obj = Luan.first(fn.call(luan)); |
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325 if( !(obj instanceof Boolean) ) |
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326 throw new LuanException("not_found_handler must return boolean"); |
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327 boolean handled = (Boolean)obj; |
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328 return handled ? (Response)module.fn(luan,"finish").call(luan) : null; |
1335 | 329 } |
330 | |
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331 } |