Mercurial Hosting > luan
diff 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> |
|---|---|
| date | Mon, 31 Dec 2012 03:15:20 +0000 |
| parents | |
| children | 5c9cadd0acce |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/luan/tools/WebRun.java Mon Dec 31 03:15:20 2012 +0000 @@ -0,0 +1,82 @@ +package luan.tools; + +import java.io.IOException; +import java.io.PrintStream; +import javax.servlet.ServletException; +import javax.servlet.ServletOutputStream; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import luan.LuanState; +import luan.LuanException; +import luan.lib.HtmlLib; + + +public class WebRun extends HttpServlet { + private static final Logger logger = LoggerFactory.getLogger(WebRun.class); + + protected LuanState newLuanState() throws LuanException { + return CmdLine.newStandardLuan(); + } + + protected void service(HttpServletRequest request,HttpServletResponse response) + throws ServletException, IOException + { + ServletOutputStream sout = response.getOutputStream(); + PrintStream out = new PrintStream(sout); + String contentType = request.getParameter("content_type"); + if( contentType != null ) + response.setContentType("text/plain"); + String code = request.getParameter("code"); + try { + LuanState luan = newLuanState(); + luan.out = out; + luan.global().put("request",request); + luan.global().put("response",response); + CmdLine.eval(luan,code,"WebRun"); + } catch(LuanException e) { + logger.error(null,e); + response.reset(); + response.setHeader("Content-Type","text/html"); + out.println( "<html>" ); + out.println( "<body>" ); + out.println( "<pre>" ); + out.println( e ); + out.println(); + out.println( addLineNumbers(HtmlLib.encode(code)) ); + out.println( "</pre>" ); + out.println( "</body>" ); + out.println( "</html>" ); + } + } + + public static String addLineNumbers(String s) { + StringBuilder buf = new StringBuilder(); + int line = 1; + int i = 0; + while(true) { + buf.append( fmt(line++,3) ); + buf.append(" "); + int i2 = s.indexOf('\n',i); + if( i2 == -1 ) { + buf.append( s.substring(i) ); + break; + } + buf.append( s.substring(i,i2+1) ); + i = i2 + 1; + } + return buf.toString(); + } + + private static String fmt(int i,int w) { + StringBuilder buf = new StringBuilder(); + buf.append(i); + while( buf.length() < w ) { + buf.insert(0,' '); + } + return buf.toString(); + } + +}