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comparison src/nabble/utils/LuanServlet.java @ 0:7ecd1a4ef557

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author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 21 Mar 2019 19:15:52 -0600
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-1:000000000000 0:7ecd1a4ef557
1 package nabble.utils;
2
3 import java.io.IOException;
4 import javax.servlet.ServletException;
5 import javax.servlet.http.HttpServlet;
6 import javax.servlet.http.HttpServletRequest;
7 import javax.servlet.http.HttpServletResponse;
8 import luan.Luan;
9 import luan.LuanException;
10 import nabble.utils.luan.HttpServicer;
11 import org.slf4j.Logger;
12 import org.slf4j.LoggerFactory;
13
14
15 public class LuanServlet extends HttpServlet {
16 private static final Logger logger = LoggerFactory.getLogger(LuanServlet.class);
17 protected final String uriPrefix;
18 protected final HttpServicer httpServicer;
19
20 private LuanServlet(String uriPrefix,Luan luan) {
21 this.uriPrefix = uriPrefix;
22 try {
23 luan.eval("require 'classpath:nabble/utils/init.luan'");
24 } catch(LuanException e) {
25 throw new RuntimeException(e);
26 }
27 this.httpServicer = new HttpServicer(luan);
28 }
29
30 public LuanServlet(String uriPrefix) {
31 this(uriPrefix,new Luan());
32 }
33
34 @Override protected void service(HttpServletRequest request,HttpServletResponse response)
35 throws IOException
36 {
37 String path = request.getRequestURI();
38 service(request,response,path);
39 }
40
41 public void service(HttpServletRequest request,HttpServletResponse response,String path)
42 throws IOException
43 {
44 if( !path.endsWith(".luan") )
45 throw new RuntimeException("'"+path+"' doesn't end with '.luan'");
46 String uri = uriPrefix + path;
47 try {
48 if( !httpServicer.service(request,response,uri) )
49 response.sendError(HttpServletResponse.SC_NOT_FOUND);
50 } catch(LuanException e) {
51 // throw new RuntimeException(e);
52 String err = e.getLuanStackTraceString();
53 logger.error(err);
54 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,"<pre>"+err+"</pre>");
55 }
56 }
57
58 }