File not found error

MarkShark · Sep 18, 2001

I have an error in my script finding a file. The servlet error log says

2001-09-18 09:01:17 - path="" :jsp: init
2001-09-18 09:02:08 - path="" :LoginServlet: init
2001-09-18 09:03:45 - path="" :abcServlet: init
2001-09-18 09:03:52 - path="" :xyzServlet: init
2001-09-18 09:03:55 - path="" :Error: /usr/local/apache/sites/abc.spinweb.net/htdocs/xxx/courses\3M/Introduction/3m_intro.html (No such file or directory)

As you can see a "\" is loaded after "courses" where a "/" should be. the html is loaded exactly where it says with the exception of the backward slash. I can't find where it is being called from, but suspect it lays in the code below. Could anyone help me in this matter, or tell me where else I should look. Thanks.

private String getAUHtml (String path){
path = path.replace ('\\', '/');
String response;
response = "<html>\n" +
"<head>\n" +
"</head>\n" +
"<body>\n" +
"<script language=\"JavaScript\">\n" +
"document.location = \"/cmi/courses/" + path + "\"\n" +
//"win = window.open ('','displayWindow','menubar=yes,scrollbars=yes,status=yes,width=300,height=300');\n" +
//"window.onload = \"win.close();\"" +
"</script>\n" +
"</body>\n" +
"</html>\n";
return response;

wushutwist · Sep 18, 2001

Could you post more of the code, at least the part where path gets set. I am bit confused, I have never recieved this error. I would suggest, in the meantime, start putting printlns throughout the code to check the value of path. Until I see more that may be the best recommendation that I can make. Wushutwist

MarkShark · Sep 18, 2001

Here is somem more code. I never had this happen either so it has me pulling my hair out. Thanks...

try {
HttpSession session = request.getSession (true);
//can I load the session given the id??
//System.out.println ("Lesson.valid session " + session.getId() + ": " + request.isRequestedSessionIdValid());
response.setContentType ("text/html&quot

;
JDBCHelper dbHelper = new JDBCHelper (_jdbcConnection);

//get student ID
Integer studentID = (Integer) session.getAttribute ("studentID&quot

;
//get course ID
Integer courseID = (Integer) session.getAttribute ("courseID&quot

;
//get lesson ID
String lessonID = request.getParameter ("lessonID&quot

;
if (lessonID == null) {
lessonID = (String) session.getAttribute ("lessonID&quot

;
}

if (studentID == null || courseID == null || lessonID == null) {
//reset session data by re-logging the user
sendProfileError (response.getOutputStream());
return;
}

//store lesson ID in session
session.setAttribute ("lessonID", lessonID);

String auID = request.getParameter ("auID&quot

;
String mode = request.getParameter ("mode&quot

;
if (mode != null) {
session.setAttribute ("mode", mode);
}
else {
mode = (String) session.getAttribute ("mode&quot

;
}
if (mode.equalsIgnoreCase ("review&quot

) {
normalMode = false;
}
else {
normalMode = true;
}

//synchronize access to course hash table
synchronized (_courseHash)
{
//make sure _courseHash is in tact
if (_courseHash == null) {
//try reloading it....
loadCourseData();
if (_courseHash == null) {
//error
response.getOutputStream().close();
throw new IOException ("Corrupt course data&quot

;
}
}
if (! _courseHash.containsKey (courseID.toString())) {
//try reloading it....
loadCourseData();
if (! _courseHash.containsKey (courseID.toString())) {
//error
response.getOutputStream().close();
throw new IOException ("Corrupt course data (course not found)&quot

;
}
}
}

if (auID == null) {
//show course menu
Hashtable hash = (Hashtable) _courseHash.get (courseID.toString());
sendAvailableAUs (hash, studentID.intValue(), courseID.intValue(), lessonID, response.getOutputStream(), response, dbHelper);
return;
}

//if AU has not been attempted, initialize it
Integer auDataID = new Integer (getAUDataID (studentID.intValue(), courseID.intValue(), lessonID, auID, dbHelper));
//if (getAUDataID (studentID.intValue(), courseID.intValue(), lessonID, auID, dbHelper) == -1) {
if (auDataID.intValue() == -1) {
int newID = initializeAUData (studentID.intValue(), courseID.intValue(), lessonID, auID, dbHelper);
dbHelper.addAUToPath (studentID.intValue(), courseID.intValue(), lessonID, auID);
auDataID = new Integer (newID);
}

session.setAttribute ("AUID", auID);
session.setAttribute ("AUDataID", auDataID);

sendAU (studentID.intValue(), courseID.intValue(), lessonID, auID, auDataID.intValue(), normalMode, response.getOutputStream(), dbHelper);
}
//to do: detailed messages should be sent to the client depending on which
// exception was thrown. Don't have one try/catch....have one for each situation
catch (Exception e) {
e.printStackTrace();
getServletContext().log("Error: " + e.getMessage());
}
}

public void destroy()
{
try {
if (_jdbcConnection != null) {
_jdbcConnection.close();
}
}
catch (Exception ignored) {}
}

private int initializeAUData (int studentID, int courseID, String lessonID, String auID, JDBCHelper dbHelper)
{
String sqlQuery = null;
ResultSet results = null;
try {
//get student's name
sqlQuery = "SELECT Full_Name" +
" FROM " + GlobalData.StudentTable +
" WHERE Student_ID = " + studentID;
results = dbHelper.doQuery (sqlQuery);
if (! results.next()) {
//error
return -1;
}
String studentName = results.getString (1);
results.close();

//the lock prevents CMIServlet from reading AU_ID before it's committed
//sqlQuery = "LOCK TABLES " + GlobalData.AUDataTable + " WRITE;";
//System.out.println (sqlQuery);
//dbHelper.executeUpdate (sqlQuery);

sqlQuery = "Insert Into " + GlobalData.AUDataTable +
"(Course_ID, Lesson_ID, AU_ID, student_id, student_name, lesson_location, credit," +
" lesson_status, entry, exit, score_raw, score_max, score_min, total_time," +
" session_time, lesson_mode, suspend_data, launch_data, Evaluation_ID, Objective_ID)" +
" Values (" + courseID + ", '" + lessonID + "', '" + auID + "', " + studentID + ", '" + studentName + "'," +
" 'NA', 'credit'," + " 'not attempted', 'ab-initio', " + "'NA', " + 0 + ", " + 0 + ", " + 0 +
", '00:00:00.0', '00:00:00.0', " + " 'normal'" + ", 'NA', " + "'NA', " + 0 + ", " + 0 + &quot

;";
dbHelper.executeUpdate (sqlQuery);

return getAUDataID (studentID, courseID, lessonID,auID, dbHelper);
//sqlQuery = "UNLOCK TABLES;";
//System.out.println (sqlQuery);
//dbHelper.executeUpdate (sqlQuery);
}
catch (Exception e) {
e.printStackTrace();
getServletContext().log("Error: " + e.getMessage());
}
return -1;
}

private int getAUDataID (int studentID, int courseID, String lessonID, String auID, JDBCHelper dbHelper)
throws SQLException
{
String sqlQuery = "SELECT AUData_ID, lesson_status, lesson_mode, exit" +
" FROM " + GlobalData.AUDataTable +
" WHERE student_id = " + studentID +
" AND Course_ID = " + courseID +
" AND Lesson_ID = " + "'" + lessonID + "'" +
" AND AU_ID = '" + auID + "';";
ResultSet results = dbHelper.doQuery (sqlQuery);
if (results.next()) {
return results.getInt ("AUData_ID&quot

;
}
return -1;
}

private void sendAU (int studentID, int courseID, String lessonID, String auID, int auDataID, boolean normalMode, ServletOutputStream htmlOut, JDBCHelper dbHelper)
throws IOException, ClassNotFoundException
{
Hashtable hash = null;
synchronized (_courseHash)
{
hash = (Hashtable) _courseHash.get (String.valueOf (courseID));
if (hash == null) {
loadCourseData();
hash = (Hashtable) _courseHash.get (String.valueOf (courseID));
if (hash == null) {
throw new IOException ("Corrupt course data (course not found)&quot

;
}
}
}
AU au = (AU) hash.get (auID);

try {
if (! normalMode) {
dbHelper.setReviewMode (auDataID);
}
String courseFileName = getFileName (String.valueOf (courseID), dbHelper);
File file = new File (courseFileName);
//create absolute path to file so we can resolve relative URLs
String newFileName = file.getParent() + "\\" + au.getLaunchParams();
BufferedReader buf = new BufferedReader (new FileReader (newFileName));
PrintWriter htmlWriter = new PrintWriter (htmlOut);
String temp;
htmlWriter.write (getAUHtml (au.getLaunchParams()));
htmlWriter.flush();
htmlWriter.close();
}
catch (Exception e) {
e.printStackTrace();
getServletContext().log("Error: " + e.getMessage());
}
}

private String getAUHtml (String path){
path = path.replace ('\\', '/');
String response;
response = "<html>\n" +
"<head>\n" +
"</head>\n" +
"<body>\n" +
"<script language=\"JavaScript\">\n" +
"document.location = \"/cmi/courses/" + path + "\"\n" +
//"win = window.open ('','displayWindow','menubar=yes,scrollbars=yes,status=yes,width=300,height=300');\n" +
//"window.onload = \"win.close();\"" +
"</script>\n" +
"</body>\n" +
"</html>\n";
return response;
}

wushutwist · Sep 18, 2001

When is the error occuring? Compile-time? Deploy-time? Runtime?

Is the HTML page getting displayed or is it failing before that point? If you are getting a page (even a blank one) post the resulting HTML.

Also, what is your Server setup? Apache forwarding to Tomcat? It is so frustrating to troubleshoot problems like these over a forum.

Last question (I promise), is this Servlet publically accessible? If so, what is the url? Wushutwist

MarkShark · Sep 18, 2001

The error is happening at runtime. When the link is selected, a blank page comes up. Below is the source code for the blank page. My server setup is Apache forwarding to Tomcat. If you e-mail me I'll give you the url for the site. My e-mail is mkain@tesco-inc.com

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>CMI</TITLE>
<META http-equiv=Content-Type content="text/html; charset=windows-1252">
<SCRIPT language=JavaScript>
function hideAppletFrame (content) {
frames[0].document.applets[0].stop();
document.open();
document.write ("<html>\n" +
"<head>\n" +
"<title>CMI</title>\n" +
"</head>\n" +
"<frameset cols=\"30%,*\">\n" +
"<frame>\n" +
"<frame>\n" +
"</frameset>\n" +
"</html>&quot

;
document.close();
frames[1].document.write (content);
frames[0].location = "cmi/LoginFrame.html";
frames[0].hideForm();
}

function setStatus (message) {
window.status = message;
return true;
}

function restart() {
window.location = "/cmi/CMI.html";
}

function loadCMIAPIFrame() {
var frame1Location;
if (navigator.appName.indexOf ("Microsoft&quot

!= -1) {
//var temp = frames[1].document.location.href;
//frame1Location = temp.substring (temp.indexOf ("/servlet&quot

);
frames[0].document.location = "/cmi/CMIAPIFrame.html";
return true;
}
else {
frame1Location = frames[1].location;
}
document.open();
document.write ("<html>\n" +
"<head>\n" +
"<title>CMI</title>\n&quot

;
document.write ("<scr" + "ipt language=\"JavaScript\">\n" +
"function setStatus (message) {\n" +
" window.status = message;\n" +
" return true;\n" +
"}\n\n&quot

;
document.write ("function restart() {\n" +
" window.location = \"/cmi/CMI.html\";\n" +
" return true;\n" +
"}\n&quot

;
document.write ("function loadCMIAPIFrame() {\n" +
" return false;\n" +
"}\n" +
"</scr" + "ipt>\n&quot

;
document.write ("</head>\n" +
"<frameset cols=\"0,*\">\n" +
"<frame src=\"/cmi/CMIAPIFrame.html\">\n" +
"<frame src=\"" + frame1Location + "\">\n" +
"</frameset>\n" +
"</html>&quot

;
document.close();
return true;
}
</SCRIPT>
</HEAD><FRAMESET cols=20%,*><FRAME src="/cmi/LoginFrame.html"><FRAME
src="/cmi/LMSIntro.html"></FRAMESET></HTML>

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File not found error

MarkShark

Programmer

wushutwist

Programmer

MarkShark

Programmer

wushutwist

Programmer

MarkShark

Programmer

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