Mercurial Hosting > luan
annotate src/luan/modules/http/LuanHandler.java @ 1335:e0cf0d108a77
major cleanup
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 14 Feb 2019 03:10:45 -0700 |
parents | 25746915a241 |
children | 8b61c8c4e07a |
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; | |
1332 | 15 import org.slf4j.Logger; |
1160 | 16 import luan.webserver.Request; |
17 import luan.webserver.Response; | |
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18 import luan.webserver.Status; |
1160 | 19 import luan.webserver.Server; |
20 import luan.webserver.Handler; | |
21 import luan.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; |
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36 private final ReadWriteLock lock = 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"); |
1335 | 59 Http.put( "reset_luan", new LuanJavaFunction(luanInit,resetLuanMethod,this) ); |
60 Http.put( "eval_in_root", new LuanJavaFunction(luanInit,evalInRootMethod,this) ); | |
61 Http.put( "disable_luan", new LuanJavaFunction(luanInit,disableLuanMethod,this) ); | |
1186 | 62 } catch(LuanException e) { |
63 throw new RuntimeException(e); | |
64 } | |
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65 currentLuan = newLuan(); |
1186 | 66 } |
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67 |
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68 private Luan newLuan() { |
1335 | 69 Luan luan; |
70 synchronized(luanInit) { | |
71 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); | |
72 luan = (Luan)cloner.clone(luanInit); | |
73 } | |
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74 luan.onClose = this; |
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75 try { |
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76 PackageLuan.load(luan,"site:/init.luan"); |
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77 } catch(LuanException e) { |
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78 //e.printStackTrace(); |
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79 String err = e.getLuanStackTraceString(); |
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80 logger.error(err); |
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81 } |
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82 return luan; |
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83 } |
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84 |
1264 | 85 /* |
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86 public Luan getLuan() { |
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87 return luan; |
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88 } |
1264 | 89 */ |
1160 | 90 @Override public Response handle(Request request) { |
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91 if( isDisabled ) |
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92 return null; |
1167 | 93 if( request.path.endsWith("/") ) |
94 return null; | |
95 String modName = "site:" + request.path +".luan"; | |
96 return handle(request,modName); | |
97 } | |
98 | |
99 Response handle(Request request,String modName) { | |
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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); |
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103 lock.readLock().lock(); |
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104 try { |
1335 | 105 return service(request,modName); |
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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 { |
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112 lock.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 { |
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140 lock.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 { |
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155 lock.readLock().unlock(); |
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156 } |
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157 } |
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158 |
1186 | 159 public void reset_luan() { |
1264 | 160 new Thread() { |
161 public void run() { | |
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162 lock.writeLock().lock(); |
1264 | 163 try { |
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164 close(); |
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165 currentLuan = newLuan(); |
1264 | 166 } finally { |
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167 lock.writeLock().unlock(); |
1264 | 168 } |
169 } | |
170 }.start(); | |
1186 | 171 } |
172 | |
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173 public void disable_luan() { |
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174 isDisabled = true; |
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175 } |
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176 |
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177 public Object runLuan(String sourceText,String sourceName) throws LuanException { |
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178 lock.readLock().lock(); |
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179 try { |
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180 Luan luan = currentLuan; |
1335 | 181 synchronized(luanInit) { |
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182 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); |
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183 Luan luan2 = (Luan)cloner.clone(luan); |
1335 | 184 LuanFunction fn = luan2.load(sourceText,sourceName); |
185 return fn.call(); | |
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186 } |
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187 } finally { |
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188 lock.readLock().unlock(); |
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189 } |
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190 } |
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191 |
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192 public void eval_in_root(String text) throws LuanException { |
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193 Luan luan; |
1335 | 194 synchronized(luanInit) { |
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195 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
1335 | 196 luan = (Luan)cloner.clone(currentLuan); |
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197 } |
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198 luan.onClose = this; |
1335 | 199 luan.load(text,"<eval_in_root>",null).call(); |
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200 currentLuan = luan; |
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201 } |
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202 |
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203 public static void start(Server server) throws Exception { |
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204 try { |
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205 server.start(); |
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206 } catch(BindException e) { |
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207 throw new LuanException(e.toString()); |
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208 } |
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209 } |
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210 |
1335 | 211 |
212 | |
213 // from HttpServicer | |
214 | |
215 private Response service(Request request,String modName) | |
216 throws LuanException | |
217 { | |
218 try { | |
219 return serviceLuan(request,modName); | |
220 } catch(LuanException e) { | |
221 return handleError(request,e); | |
222 } | |
223 } | |
224 | |
225 private Response handleError(Request request,LuanException e) | |
226 throws LuanException | |
227 { | |
228 //e.printStackTrace(); | |
229 Luan luan; | |
230 synchronized(luanInit) { | |
231 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); | |
232 luan = (Luan)cloner.clone(currentLuan); | |
233 } | |
234 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
235 return (Response)module.fn("handle_error").call( request, e.table(luan) ); | |
236 } | |
237 | |
238 private Response serviceLuan(Request request,String modName) | |
239 throws LuanException | |
240 { | |
241 LuanFunction fn; | |
242 Luan luan; | |
243 synchronized(luanInit) { | |
244 enableLoad("luan:http/Http.luan",modName); | |
245 PackageLuan.require(currentLuan,"luan:http/Http.luan"); | |
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 | |
256 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
257 module.fn("new_request").call(request); | |
258 module.fn("new_response").call(); | |
259 | |
260 fn.call(); | |
261 | |
262 return (Response)module.fn("finish").call(); | |
263 } | |
264 | |
265 private void enableLoad(String... mods) throws LuanException { | |
266 LuanTable loaded = PackageLuan.loaded(currentLuan); | |
267 for( String mod : mods ) { | |
268 if( loaded.rawGet(mod) == null ) { | |
269 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); | |
270 currentLuan = (Luan)cloner.clone(currentLuan); | |
271 break; | |
272 } | |
273 } | |
274 } | |
275 | |
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276 } |