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Struts & Hibernate
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| | | 404 error when a newly created file is requested | 404 error when a newly created file is requested 2006-12-15 - By Carl
Back
Environment: Tomcat 5.5.17, Windows XP
Background: I have a jsp page that contains a javascript rich text editor that
I use to create snippets of HTML code that are stored in a database and later
displayed on other pages. Since the snippets can contain some custom tags, I
have a 'Preview' button that reads the snippet directly from the editor, reads
a 'preview' jsp file from the file system, places the snippet in the correct
place in the file, writes the 'preview' file with the snippet to a temporary
file and opens a new window (using javascript) which requests the temporary
page from Tomcat.
Problem: I can see the newly created temporary file in the file system. I can
open it with an editor and it is all good. But, Tomcat returns a 404 error for
approximately one minute and then will serve the page upon hitting only the
refresh.
Analysis: I suspect the system is holding onto the newly written file until it
hits some timeout but I have tried everything I can think of to make certain
the file has been 'released'. The relevent parts of the copy process:
try {
File tempFile = File.createTempFile("preview", ".jsp", new File("C:
/projects/EtrakWebApp/web/jsp/tempfiles"));
// read the preview jsp
FileWriter fw = new FileWriter(tempFile);
File infile = new File(destinationDir+"preview.jsp");
if( infile.exists() )
{
FileReader fr = new FileReader(infile);
BufferedReader in = new BufferedReader(fr);
while(true)
{
String line = in.readLine();
if( line==null )
break;
System.out.println("line "+line );
// insert the text
if( line.contains("insert_preview_text") )
{
fw.write(previewText+"\n");
}
else {
fw.write(line+"\n");
}
}
fr.close();
in.close();
}
fw.flush();
fw.close();
fw = null;
}
catch (FileNotFoundException fnf)
{
fnf.printStackTrace();
}
catch (Exception ex)
{
ex.printStackTrace();
}
return returnFileName;
Anyone have any ideas?
TIA,
Carl Kabbe
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859 (See http://iso-8859.ora-code.com)-1">
<META content="MSHTML 6.00.2800.1106" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>Environment: </FONT><FONT face=Arial
size=2>Tomcat 5.5.17, Windows XP</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Background: I have a jsp page that contains
a
javascript rich text editor that I use to create snippets of HTML code that are
stored in a database and later displayed on other pages. Since the
snippets can contain some custom tags, I have a 'Preview' button that reads the
snippet directly from the editor, reads a 'preview' jsp file from the file
system, places the snippet in the correct place in the file, writes the
'preview' file with the snippet to a temporary file and opens a new window
(using javascript) which requests the temporary page from
Tomcat.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Problem: I can see the newly created
temporary file in the file system. I can open it with an editor and it is
all good. But, Tomcat returns a 404 error for approximately one
minute and then will serve the page upon hitting only the refresh.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Analysis: I suspect the system is holding
onto the newly written file until it hits some timeout but I have tried
everything I can think of to make certain the file has been
'released'.</FONT> <FONT face=Arial size=2> The relevent parts of the copy
process:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> try
{<BR>
<BR> File tempFile = File.createTempFile("preview",
".jsp", new
File("C:/projects/EtrakWebApp/web/jsp/tempfiles"));<BR>
<BR> // read
the preview jsp<BR> FileWriter fw = new
FileWriter(tempFile);</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial
size=2> File
infile = new
File(destinationDir+"preview.jsp");<BR>
<BR> if(
infile.exists()
)<BR>
{<BR>
FileReader fr = new
FileReader(infile);<BR>
<BR>
BufferedReader in = new
BufferedReader(fr);<BR>
<BR>
while(true)<BR>
{<BR>
String line =
in.readLine();<BR>
<BR>
if( line==null
)<BR>
break;<BR>
<BR>
System.out.println("line "+line
);<BR>
<BR>
// insert the
text<BR>  
;
if( line.contains("insert_preview_text")
)<BR>
{<BR>
fw.write(previewText+"\n");<BR>
}<BR>
else
{<BR>
fw.write(line+"\n");<BR>
}<BR>
}<BR>
<BR>
fr.close();<BR>
in.close();<BR>
}<BR>
<BR>
fw.flush();<BR>
fw.close();<BR> fw =
null;<BR>
}<BR> catch (FileNotFoundException
fnf)<BR>
{<BR>
fnf.printStackTrace();<BR>
}<BR> catch (Exception
ex)<BR>
{<BR>
ex.printStackTrace();<BR>
}<BR>
<BR> return
returnFileName;<BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Anyone have any ideas?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>TIA,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Carl Kabbe</DIV></FONT>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV></BODY></HTML>
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.409 / Virus Database: 268.15.19/587 - Release Date: 12/14/2006
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