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annotate src/luan/modules/http/HttpServicer.java @ 1256:c147e2e877e3

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allow subclassing of HttpServicer
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 19 Sep 2018 20:15:16 -0600
parents 354e661dee7f
children 382c444a6c77
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1 package luan.modules.http;
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2
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3 import org.slf4j.Logger;
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4 import org.slf4j.LoggerFactory;
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5 import luan.webserver.Request;
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6 import luan.webserver.Response;
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7 import luan.webserver.Status;
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8 import luan.LuanState;
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9 import luan.LuanFunction;
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10 import luan.LuanException;
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11 import luan.LuanTable;
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12 import luan.LuanCloner;
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13 import luan.modules.PackageLuan;
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16 public class HttpServicer {
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17 private static final Logger logger = LoggerFactory.getLogger(HttpServicer.class);
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18
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19 public Response service(LuanState luan,Request request,String modName) {
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20 try {
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21 return serviceLuan(luan,request,modName);
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22 } catch(LuanException e) {
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23 return handleError(request,e);
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24 }
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25 }
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26
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27 protected Response handleError(Request request,LuanException e) {
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28 //e.printStackTrace();
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29 String err = e.getLuanStackTraceString();
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30 logger.error(err+"\n"+request.rawHead.trim()+"\n");
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31 String msg = "Internel Server Error\n\n" + err;
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32 return Response.errorResponse( Status.INTERNAL_SERVER_ERROR, msg );
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33 }
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35 protected Response serviceLuan(LuanState luan,Request request,String modName)
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36 throws LuanException
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37 {
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38 LuanFunction fn;
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39 synchronized(luan) {
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40 inSinchronized(luan,request);
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41 PackageLuan.enableLoad(luan,"luan:http/Http.luan",modName);
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42 PackageLuan.require(luan,"luan:http/Http.luan");
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43 Object mod = PackageLuan.load(luan,modName);
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44 if( mod.equals(Boolean.FALSE) )
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45 return null;
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46 if( !(mod instanceof LuanFunction) )
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47 throw new LuanException( "module '"+modName+"' must return a function" );
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48 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL);
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49 luan = (LuanState)cloner.clone(luan);
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50 fn = (LuanFunction)cloner.get(mod);
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51 }
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52
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53 LuanTable module = (LuanTable)PackageLuan.require(luan,"luan:http/Http.luan");
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55 // request
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56 LuanFunction newRequestFn = (LuanFunction)module.rawGet("new_request");
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57 newRequestFn.call( luan, new Object[]{request} );
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59 // response
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60 LuanFunction newResponseFn = (LuanFunction)module.rawGet("new_response");
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61 newResponseFn.call(luan);
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63 fn.call(luan);
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65 LuanFunction finishFn = (LuanFunction)module.rawGet("finish");
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66 Response response = (Response)finishFn.call(luan);
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67 return response;
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68 }
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70 protected void inSinchronized(LuanState luan,Request request)
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71 throws LuanException
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72 {}
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74 }