Mercurial Hosting > luan
annotate src/luan/tools/WebRun.java @ 52:0c0f2b107099
add WebRun
git-svn-id: https://luan-java.googlecode.com/svn/trunk@53 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Mon, 31 Dec 2012 03:15:20 +0000 |
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children | 5c9cadd0acce |
rev | line source |
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52
0c0f2b107099
add WebRun
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan.tools; |
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2 |
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3 import java.io.IOException; |
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4 import java.io.PrintStream; |
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5 import javax.servlet.ServletException; |
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6 import javax.servlet.ServletOutputStream; |
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7 import javax.servlet.http.HttpServlet; |
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8 import javax.servlet.http.HttpServletRequest; |
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9 import javax.servlet.http.HttpServletResponse; |
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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.LuanState; |
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13 import luan.LuanException; |
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14 import luan.lib.HtmlLib; |
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15 |
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16 |
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17 public class WebRun extends HttpServlet { |
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18 private static final Logger logger = LoggerFactory.getLogger(WebRun.class); |
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19 |
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20 protected LuanState newLuanState() throws LuanException { |
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21 return CmdLine.newStandardLuan(); |
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22 } |
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23 |
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24 protected void service(HttpServletRequest request,HttpServletResponse response) |
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25 throws ServletException, IOException |
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26 { |
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27 ServletOutputStream sout = response.getOutputStream(); |
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28 PrintStream out = new PrintStream(sout); |
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29 String contentType = request.getParameter("content_type"); |
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30 if( contentType != null ) |
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31 response.setContentType("text/plain"); |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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32 String code = request.getParameter("code"); |
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33 try { |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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34 LuanState luan = newLuanState(); |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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35 luan.out = out; |
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36 luan.global().put("request",request); |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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37 luan.global().put("response",response); |
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38 CmdLine.eval(luan,code,"WebRun"); |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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39 } catch(LuanException e) { |
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40 logger.error(null,e); |
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41 response.reset(); |
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42 response.setHeader("Content-Type","text/html"); |
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43 out.println( "<html>" ); |
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44 out.println( "<body>" ); |
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45 out.println( "<pre>" ); |
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46 out.println( e ); |
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47 out.println(); |
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48 out.println( addLineNumbers(HtmlLib.encode(code)) ); |
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49 out.println( "</pre>" ); |
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50 out.println( "</body>" ); |
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51 out.println( "</html>" ); |
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52 } |
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53 } |
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54 |
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55 public static String addLineNumbers(String s) { |
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56 StringBuilder buf = new StringBuilder(); |
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57 int line = 1; |
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58 int i = 0; |
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59 while(true) { |
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60 buf.append( fmt(line++,3) ); |
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61 buf.append(" "); |
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62 int i2 = s.indexOf('\n',i); |
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63 if( i2 == -1 ) { |
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64 buf.append( s.substring(i) ); |
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65 break; |
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66 } |
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67 buf.append( s.substring(i,i2+1) ); |
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68 i = i2 + 1; |
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69 } |
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70 return buf.toString(); |
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71 } |
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72 |
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73 private static String fmt(int i,int w) { |
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74 StringBuilder buf = new StringBuilder(); |
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75 buf.append(i); |
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76 while( buf.length() < w ) { |
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77 buf.insert(0,' '); |
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78 } |
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79 return buf.toString(); |
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80 } |
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81 |
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82 } |