Mercurial Hosting > luan
annotate src/luan/modules/http/LuanHandler.java @ 1319:f7355714742f
add Http.disable_luan()
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Mon, 04 Feb 2019 02:04:54 -0700 |
parents | 503bde9a7c80 |
children | 307e76ccd0d6 |
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; | |
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15 import org.slf4j.Logger; |
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16 import org.slf4j.LoggerFactory; |
1160 | 17 import luan.webserver.Request; |
18 import luan.webserver.Response; | |
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19 import luan.webserver.Status; |
1160 | 20 import luan.webserver.Server; |
21 import luan.webserver.Handler; | |
22 import luan.webserver.ResponseOutputStream; | |
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23 import luan.Luan; |
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24 import luan.LuanState; |
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25 import luan.LuanTable; |
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26 import luan.LuanFunction; |
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27 import luan.LuanJavaFunction; |
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28 import luan.LuanCloner; |
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29 import luan.LuanException; |
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30 import luan.modules.PackageLuan; |
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31 import luan.modules.BasicLuan; |
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32 |
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33 |
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34 public final class LuanHandler implements Handler, LuanState.OnClose { |
1186 | 35 private final LuanState luanInit; |
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36 private final Logger logger; |
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37 private final ReadWriteLock lock = new ReentrantReadWriteLock(); |
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38 private final List<Reference<Closeable>> onClose = new ArrayList<Reference<Closeable>>(); |
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39 private volatile LuanState currentLuan; |
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40 private volatile boolean isDisabled = false; |
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41 |
1186 | 42 private static final Method resetLuanMethod; |
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43 private static final Method evalInRootMethod; |
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44 private static final Method disableLuanMethod; |
1186 | 45 static { |
46 try { | |
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47 resetLuanMethod = LuanHandler.class.getMethod( "reset_luan" ); |
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48 evalInRootMethod = LuanHandler.class.getMethod( "eval_in_root", String.class ); |
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49 disableLuanMethod = LuanHandler.class.getMethod( "disable_luan" ); |
1186 | 50 } catch(NoSuchMethodException e) { |
51 throw new RuntimeException(e); | |
52 } | |
53 } | |
54 | |
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55 public LuanHandler(LuanState luanInit,String loggerRoot) { |
1231 | 56 this.luanInit = luanInit; |
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57 if( loggerRoot==null ) |
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58 loggerRoot = ""; |
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59 logger = LoggerFactory.getLogger(loggerRoot+LuanHandler.class.getName()); |
1186 | 60 try { |
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61 LuanTable Http = (LuanTable)luanInit.require("luan:http/Http.luan"); |
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62 Http.put( "reset_luan", new LuanJavaFunction(resetLuanMethod,this) ); |
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63 Http.put( "eval_in_root", new LuanJavaFunction(evalInRootMethod,this) ); |
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64 Http.put( "disable_luan", new LuanJavaFunction(disableLuanMethod,this) ); |
1186 | 65 } catch(LuanException e) { |
66 throw new RuntimeException(e); | |
67 } | |
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68 currentLuan = newLuan(); |
1186 | 69 } |
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70 |
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71 private LuanState newLuan() { |
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72 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
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73 LuanState luan = (LuanState)cloner.clone(luanInit); |
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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 String err = e.getLuanStackTraceString(); |
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79 logger.error(err); |
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80 } |
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81 return luan; |
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82 } |
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83 |
1264 | 84 /* |
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85 public LuanState getLuan() { |
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86 return luan; |
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87 } |
1264 | 88 */ |
1160 | 89 @Override public Response handle(Request request) { |
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90 if( isDisabled ) |
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91 return null; |
1167 | 92 if( request.path.endsWith("/") ) |
93 return null; | |
94 String modName = "site:" + request.path +".luan"; | |
95 return handle(request,modName); | |
96 } | |
97 | |
98 Response handle(Request request,String modName) { | |
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99 Thread thread = Thread.currentThread(); |
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100 String oldName = thread.getName(); |
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101 thread.setName(request.headers.get("host")+request.path); |
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102 lock.readLock().lock(); |
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103 try { |
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104 return HttpServicer.service(currentLuan,request,modName); |
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105 } catch(LuanException e) { |
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106 String err = e.getLuanStackTraceString(); |
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107 logger.error(err+"\n"+request.rawHead.trim()+"\n"); |
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108 String msg = "Internel Server Error\n\n" + err; |
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109 return Response.errorResponse( Status.INTERNAL_SERVER_ERROR, msg ); |
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110 } finally { |
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111 lock.readLock().unlock(); |
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112 thread.setName(oldName); |
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113 } |
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114 } |
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115 |
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116 public void onClose(Closeable c) { |
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117 synchronized(onClose) { |
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118 onClose.add(new WeakReference<Closeable>(c)); |
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119 } |
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120 } |
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121 |
1231 | 122 public void close() { |
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123 synchronized(onClose) { |
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124 for( Reference<Closeable> ref : onClose ) { |
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125 Closeable c = ref.get(); |
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126 if( c != null ) { |
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127 try { |
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128 c.close(); |
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129 } catch(IOException e) { |
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130 logger.error(c.toString(),e); |
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131 } |
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132 } |
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133 } |
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134 onClose.clear(); |
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135 } |
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136 } |
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137 |
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138 public Object call_rpc(String fnName,Object... args) throws LuanException { |
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139 lock.readLock().lock(); |
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140 try { |
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141 LuanFunction fn; |
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142 LuanState luan = currentLuan; |
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143 synchronized(luan) { |
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144 PackageLuan.enableLoad(luan,"luan:Rpc.luan"); |
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145 LuanTable rpc = (LuanTable)luan.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 luan = (LuanState)cloner.clone(luan); |
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152 fn = (LuanFunction)cloner.get(fn); |
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153 } |
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154 return fn.call(luan,args); |
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155 } finally { |
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156 lock.readLock().unlock(); |
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157 } |
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158 } |
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159 |
1186 | 160 public void reset_luan() { |
1264 | 161 new Thread() { |
162 public void run() { | |
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163 lock.writeLock().lock(); |
1264 | 164 try { |
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165 close(); |
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166 currentLuan = newLuan(); |
1264 | 167 } finally { |
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168 lock.writeLock().unlock(); |
1264 | 169 } |
170 } | |
171 }.start(); | |
1186 | 172 } |
173 | |
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174 public void disable_luan() { |
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175 isDisabled = true; |
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176 } |
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177 |
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178 public Object runLuan(String sourceText,String sourceName) throws LuanException { |
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179 lock.readLock().lock(); |
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180 try { |
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181 LuanFunction fn = Luan.load(sourceText,sourceName); |
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182 LuanState luan = currentLuan; |
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183 synchronized(luan) { |
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184 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); |
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185 LuanState luan2 = (LuanState)cloner.clone(luan); |
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186 return fn.call(luan2); |
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187 } |
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188 } finally { |
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189 lock.readLock().unlock(); |
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190 } |
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191 } |
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192 |
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193 public void eval_in_root(String text) throws LuanException { |
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194 LuanState oldLuan = currentLuan; |
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195 LuanState luan; |
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196 synchronized(oldLuan) { |
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197 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
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198 luan = (LuanState)cloner.clone(oldLuan); |
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199 } |
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200 luan.onClose = this; |
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201 BasicLuan.load(text,"<eval_in_root>",null).call(luan); |
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202 currentLuan = luan; |
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203 } |
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204 |
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205 public static void start(Server server) throws Exception { |
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206 try { |
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207 server.start(); |
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208 } catch(BindException e) { |
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209 throw new LuanException(e.toString()); |
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210 } |
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211 } |
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212 |
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213 } |