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annotate src/luan/modules/http/LuanHandler.java @ 1185:94cf2576a922

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implement WebHandler for nginx
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 21 Feb 2018 21:22:16 -0700
parents 794ddcfbee20
children ef8cd42e23d5
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diff changeset
1 package luan.modules.http;
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2
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3 import java.io.Writer;
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4 import java.io.PrintWriter;
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5 import java.io.IOException;
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6 import java.lang.reflect.Method;
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7 import java.net.BindException;
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8 import java.util.concurrent.locks.ReadWriteLock;
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9 import java.util.concurrent.locks.ReentrantReadWriteLock;
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10 import org.slf4j.Logger;
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11 import org.slf4j.LoggerFactory;
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12 import luan.webserver.Request;
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13 import luan.webserver.Response;
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14 import luan.webserver.Server;
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15 import luan.webserver.Handler;
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16 import luan.webserver.Status;
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17 import luan.webserver.ResponseOutputStream;
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18 import luan.Luan;
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19 import luan.LuanState;
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20 import luan.LuanTable;
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21 import luan.LuanFunction;
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22 import luan.LuanJavaFunction;
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23 import luan.LuanCloner;
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24 import luan.LuanException;
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25 import luan.modules.PackageLuan;
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27
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28 public class LuanHandler implements Handler {
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29 private final Logger logger;
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30 private final ReadWriteLock lock = new ReentrantReadWriteLock();
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31 private final LuanState luan;
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32
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33 public LuanHandler(LuanState luanInit,String loggerRoot) {
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34 if( loggerRoot==null )
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35 loggerRoot = "";
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36 logger = LoggerFactory.getLogger(loggerRoot+LuanHandler.class.getName());
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37
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38 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE);
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39 this.luan = (LuanState)cloner.clone(luanInit);
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40 try {
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41 PackageLuan.load(luan,"site:/init.luan");
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42 } catch(LuanException e) {
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43 String err = e.getLuanStackTraceString();
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44 logger.error(err);
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45 }
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46 }
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47
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48 @Override public Response handle(Request request) {
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49 if( request.path.endsWith("/") )
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50 return null;
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51 String modName = "site:" + request.path +".luan";
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52 return handle(request,modName);
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53 }
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54
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55 Response handle(Request request,String modName) {
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56 Thread thread = Thread.currentThread();
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57 String oldName = thread.getName();
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58 thread.setName(request.headers.get("host")+request.path);
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59 lock.readLock().lock();
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60 try {
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61 Response response = HttpServicer.service(luan,request,modName);
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62 return response;
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63 } catch(LuanException e) {
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64 //e.printStackTrace();
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65 String err = e.getLuanStackTraceString();
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66 logger.error(err);
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67 String msg = "Internel Server Error\n\n" + err;
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68 return Response.errorResponse( Status.INTERNAL_SERVER_ERROR, msg );
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69 } finally {
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70 lock.readLock().unlock();
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71 thread.setName(oldName);
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72 }
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73 }
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74
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75 public void close() throws IOException {
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76 synchronized(luan) {
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77 luan.close();
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78 }
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79 }
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80
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81 public Object call_rpc(String fnName,Object... args) throws LuanException {
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82 lock.readLock().lock();
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83 try {
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84 LuanFunction fn;
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85 LuanState luan = this.luan;
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86 synchronized(luan) {
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87 PackageLuan.enableLoad(luan,"luan:Rpc.luan");
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88 LuanTable rpc = (LuanTable)PackageLuan.require(luan,"luan:Rpc.luan");
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89 LuanTable fns = (LuanTable)rpc.get(luan,"functions");
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90 fn = (LuanFunction)fns.get(luan,fnName);
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91 if( fn == null )
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92 throw new LuanException( "function not found: " + fnName );
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93 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL);
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94 luan = (LuanState)cloner.clone(luan);
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95 fn = (LuanFunction)cloner.get(fn);
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96 }
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97 return fn.call(luan,args);
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98 } finally {
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99 lock.readLock().unlock();
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100 }
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101 }
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102
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103 public Object runLuan(String sourceText,String sourceName) throws LuanException {
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104 LuanFunction fn = Luan.load(sourceText,sourceName);
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105 synchronized(luan) {
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106 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL);
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107 LuanState luan = (LuanState)cloner.clone(this.luan);
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108 return fn.call(luan);
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109 }
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110 }
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111
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112 public static void start(Server server) throws Exception {
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113 try {
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114 server.start();
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115 } catch(BindException e) {
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116 throw new LuanException(e.toString());
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117 }
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118 }
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119
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120 }