How Do I read in a file as text to a buffer?

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How Do I read in a file as text to a buffer?

 
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  #1
Jul 21st, 2009
I have a jsp...I need to read in the generated html fron the jsp to a string buffer I can use in a mail method

how do u do that?

test.jsp
Last edited by mimsc; Jul 21st, 2009 at 5:07 pm.
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Re: How Do I read in a file as text to a buffer?

 
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  #2
Jul 22nd, 2009
You can use the URLConnection class or the Apache Commons HttpClient library to retrieve the HTML generated by your JSP; pushing it into a StringBuffer/StringBuilder is just a matter of reading the HTTP response stream.
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Re: How Do I read in a file as text to a buffer?

 
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  #3
Jul 22nd, 2009
hey thanx for the response....check me out this what I got:

I got a form called "homeSellerReport1.jsp"..that has a submit that goes to this page:

Java Syntax (Toggle Plain Text) 
  1. <%@ page language="java" %>
  2. <%@ page import="trader.webservices.util.Utils" %>
  3. <%@ page import="trader.webservices.util.EmailSender" %>
  4. <%@ page import="trader.webservices.data.UserDataVO" %>
  5. <%@ page import="trader.webservices.data.UserInfoDAO" %>
  6. <%@ page import="trader.webservices.data.AgentInfoDAO" %>
  7. <%@ page import="java.io.DataOutputStream" %>
  8. <%@ page import="java.io.FileOutputStream" %>
  9. <%@ page import="java.io.FileInputStream" %>
  10. <%@ page import="java.io.IOException" %>
  11. <%@ page import="java.util.*" %>
  12. <%@ page import="java.net.*" %>
  13. <%@ page import="java.io.*" %>
  14.  
  15. 	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
  16.    "http://www.w3.org/TR/html4/loose.dtd">
  17.  <% 
  18.  	UserDataVO userData = null;
  19.  
  20.  	String username = request.getParameter("username");
  21. 	String password = request.getParameter("password");
  22. 	String format = "txt";
  23.  
  24. 	//String domainName = UserInfoDAO.removeHostRedirection(request.getServerName());
  25.  
  26. 	String adminServer = request.getServerName();
  27. 	String javaAdminServer = request.getServerName();
  28.  
  29. 	 if (request.getServerName().equals("localhost") || request.getServerName().startsWith("199")) {
  30. 			adminServer = "cpanel.homes.com";
  31. 			javaAdminServer = "localhost:8080";
  32. 	 }
  33.  
  34. 			userData = UserInfoDAO.getUserInfo(username);
  35.  
  36. 	//String address = "suggestaservice@agentadvantage.com,support@agentadvantage.com";
  37. 	String emailTo = request.getParameter("emailTo");
  38.  
  39.  
  40. 	URL httpUrl  = new URL("http://" + javaAdminServer + "/JAABA/jsp/cpanel/homeSellerReport1.jsp");
  41. 	InputStream fis  = httpUrl.openStream();
  42.                 byte[] bytes = new byte[fis.available()];
  43.  
  44.  
  45.                 fis.read(bytes);
  46.                 String strFileContent = new String(bytes);
  47.  
  48.  
  49. 	String msgBody = "Attached is the homeseller report you requested.";
  50. 	EmailSender emailSender = new EmailSender();
  51. 	emailSender.sendMailWithAttachment(emailTo,"web@homes.com","HomeSeller Report from Control Pane, Test",msgBody,strFileContent,format);
  52.  
  53.    %>


but im getting this error

java.io.IOException: Server returned HTTP response code: 500 for URL: http://localhost:8080/JAABA/jsp/cpan...lerReport1.jsp
Last edited by mimsc; Jul 22nd, 2009 at 3:02 pm.
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Re: How Do I read in a file as text to a buffer?

 
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  #4
Jul 22nd, 2009
Is that link accessible via the browser? Since a server error has occurred, it might pay off to see the server log for more details.

BTW, I think you are better off using a free reporting tool like Jasper Reports to create reports rather than use the JSP of your very own application. Also, moving all this business code in a separate class which would be called by the servlet would be a wise move.
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Re: How Do I read in a file as text to a buffer?

 
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  #5
Jul 22nd, 2009
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Originally Posted by ~s.o.s~ View Post
Is that link accessible via the browser? Since a server error has occurred, it might pay off to see the server log for more details.

BTW, I think you are better off using a free reporting tool like Jasper Reports to create reports rather than use the JSP of your very own application. Also, moving all this business code in a separate class which would be called by the servlet would be a wise move.

nah that link is not accesible via the browser...the log's tellin me Im getting a null from that page im trying to read from because its a form that requires parameters passed to it once accessed.....so I know what the problem is.....I just dont know how to get around it
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Re: How Do I read in a file as text to a buffer?

 
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  #6
Jul 22nd, 2009
I basically when I hit the "submit...I wanna go to that page....and have have all the rendered html from the page I was just on in a string so I can pass to that function

when I try to do that HTTP stream it wipes the page clean...thats the problem
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Re: How Do I read in a file as text to a buffer?

 
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  #7
Jul 22nd, 2009
> a form that requires parameters passed to it once accessed.....so I
> know what the problem is.....I just dont know how to get around it

You can pass those form parameters in the URL [assuming you know what they are]
Java Syntax (Toggle Plain Text) 
  1. String url = "http://localhost/MyApp/param1=value1&param2=value2";

But like I previously mentioned, all this is really hackish; you really need to come up with something better than calling your own JSP and mailing its response.
Last edited by ~s.o.s~; Jul 22nd, 2009 at 4:35 pm.
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