Develop Reference

How to really clean the property from System class?

I am trying to do a request on a REST service on two different web servers. On both servers it is necessary to present a keyStore, obviously they are different keyStores. Running the code below I am having successful only in the first request (for the test environment), but when I do the second request (for the staging environment), the request presents the first keyStore, in this case testKeyStore.jks.
I tried to clear the keyStore property of the System class and set a new value. In println it is displayed as if the property was changed, but when I see the log on the staging server, the testKeyStore was presented, not the stagingKeyStore.
If I change de order, first STAGING and then TEST, in doStaff() method, the second request fail because the stagingKeyStore is present in the test-server.
Is there some solution to solve this problem?
public void doStaff() {
callServer("TEST");
callServer("STAGING");
}
private void callServer(String enviroment) {
String url = "";
if ("TEST".equalsIgnoreCase(enviroment))
url = "https://test-server/dostaff";
else if("STAGING".equalsIgnoreCase(enviroment))
url = "https://staging-server/dostaff";
try {
System.clearProperty("javax.net.ssl.keyStore");
System.out.println(enviroment + " -> " + System.getProperty("javax.net.ssl.keyStore"));
if ("TEST".equalsIgnoreCase(enviroment)) {
System.setProperty("javax.net.ssl.keyStore", "C:\\temp\\testKeyStore.jks");
} else if("STAGING".equalsIgnoreCase(enviroment)) {
System.setProperty("javax.net.ssl.keyStore", "C:\\temp\\stagingKeyStore.jks");
}
System.out.println(enviroment + " -> " + System.getProperty("javax.net.ssl.keyStore"));
//...
} catch (Exception e) {
e.printStackTrace();
}
}

Access is denied for writing to ApplicationResources.properties file

For bilingual support in an application I am working on, we are using Spring messaging which uses two files, ApplicationResources.properties and ApplicationResources_fr.properties. This works well.
Now I am trying to expand on this by making it a little more dynamic. The application will read key value pairs from the database and insert them, which gives me the following error:
java.io.FileNotFoundException: \ApplicationResources.properties (Access is denied)
I am able to check on the key value pairs so I know the path I am using is correct. I have also checked the files in Eclipse properties by right clicking, and by visiting the actual file on my system, and they are not read-only. I do not believe they are encrypted because I am able to open and view with notepad++.
Here is my testing code which shows I can view them
Properties test_prop = null;
InputStream is = null;
try {
test_prop = new Properties();
is = this.getClass().getResourceAsStream(en_path);
test_prop.load(is);
Set<Object> keys = test_prop.keySet();
boolean key_found = false;
for(Object k:keys) {
String key = (String)k;
if(key.equals("f12345"))
{
key_found=true;
break;
}
}
System.out.println("Language Properties Test in DAO:" + (key_found? "Key Found" : "Key not found"));
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (NullPointerException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Here is where I try to write to the file, and get the error:
ResultSet rs = null;
try (
Connection connection = jdbcTemplate.getDataSource().getConnection();
CallableStatement callableStatement = connection.prepareCall(test_prod_cur);
)
{
callableStatement.registerOutParameter(1, OracleTypes.CURSOR);
callableStatement.executeUpdate();
rs = (ResultSet) callableStatement.getObject(1);
while (rs.next())
{
String thead = rs.getString(1);
//System.out.println(thead + " " + rs.getString(2) + " " + rs.getString(3));
en_prop.setProperty(keyheader+thead, rs.getString(2));
fr_prop.setProperty(keyheader+thead, rs.getString(3));
}
}
catch (SQLException e)
{
System.out.println("SQLException - bilingual values - CLUDAOImpl");
System.out.println(e.getMessage());
}
//add to properties files
//*
try (OutputStream en_os = new FileOutputStream(en_path);)
{
en_prop.store(en_os, null);
} catch (IOException e) {
e.printStackTrace();
}
try(OutputStream fr_os = new FileOutputStream(en_path);)
{
fr_prop.store(fr_os, null);
} catch (IOException e) {
e.printStackTrace();
}
So the database query is successful, that was tested with the commented out system.out.println. It is the following lines that end up throwing the error:
en_prop.store(en_os, null);
fr_prop.store(fr_os, null);
Update: I did a search on the java.util.Properties which lead me to the javadocs on it and wow does that simplify many things. I can now grab a property value or check if the key exists in 6 lines of code (not counting try catch).
Properties prop = null;
InputStream is = null;
this.prop = new Properties();
is = this.getClass().getResourceAsStream(path);
prop.load(is);
this.prop.getProperty("key name"); //returns value of key, or null
this.prop.containsKey("key name"); //returns true if key exists
Update2: There is an issue using java.util.Properties and that is you lose all formatting of the original file, so white-space, comments, and ordering are all lost. In another answer someone suggested using Apache's Commons Configuration API. I plan on trying it out.

So I ended up creating a class to handle interactions with the ApplicationResources(_fr).properties files instead of doing it in the DAO. This was because I plan on using it in more places. I also started using methods from the java.util.Properties Javadocs which proved very helpful and simplified many areas.
Below is my new file write/properties store code.
try (
OutputStream en_os = new FileOutputStream(getClass().getResource(en_path).getFile(),false);
OutputStream fr_os = new FileOutputStream(getClass().getResource(fr_path).getFile(), false);
)
{
en_prop.store(en_os, null);
fr_prop.store(fr_os, null);
} catch (IOException e) {
e.printStackTrace();
}
Lets compare the new and original OutputStreams:
OutputStream en_os = new FileOutputStream(getClass().getResource(en_path).getFile(),false); //new
OutputStream en_os = new FileOutputStream(en_path); //original, Access is Denied
This answer is incomplete for the following reasons.
I am unable to explain why the original method failed and resulted in a "Access is denied error".
More concerning reason to me, this doesnt actually alter the file I am expecting or wanting. I expected to alter the file that appears in my project navigator, but when viewed changes are not observed. If I use an absolute path (C:\...) and overwrite the file then I can alter it as expected, but this path would have to be changed as servers are changed and its bad programming and dangerous. This working method is altering some kind of temp or running file (as confirmed via the path as the file that shows the new values is in the tmp0 folder). After some testing, this temporary file is overwritten on startup only when the original file has been changed, otherwise the new values persist across application starting.
I am also unsure as to the scope of this file. I am unable to tell if all users interacting with the website would cause changes to the same file. If all users are interacting with the file, then potential leakage across sessions could occur. It is also possible that each session has isolated values and could lead to missing information. I suspect that all users are interacting with the same resource but have not performed the testing required to be absolutely positive about this. UPDATE: I have confirmed that all users interact with the same temporary file.

Error getting list of files from a particular directory on apache server

I am getting error on fetching the list of files from apache server using serverFileList(). Android is crashing on making of object of ApacheURLLister class. I am beginner in Android Development. Please tell me how to fetch list of files from the server?
Public List serverFileList(){
URL url;
List serverDir = null;
try {
url = new URL("http://192.168.137.1/temp/");
ApacheURLLister lister = new ApacheURLLister();
serverDir = lister.listAll(url);
}
catch (Exception e) {
e.printStackTrace();
Log.e("ERROR ON GETTING FILE","Error is " +e);
}
return serverDir;
}

You cannot just simply pull list of files on the server. You need to give name of particular file to be fetched therefore you have to write code in such a way that you specify which file is to be fetched from server. This can be resolved also through server sided scripting

"You are not authorized..." when importing a DXL file

I have a problem with a java based DXL import.
We want to maintain properties files via our Java framework. I am working with a temporary file on my filesystem (I am working on a local server). I am exporting the new properties file to my filesystem, generate a DXL file in the same folder and then try to import the DXL into my database.
I have done several options of the importer and we are creating the stream and the importer with sessionAsSignerWithFullAccess. The code is signed with the ID of the Server Admin who has Full Access to everything.
When importing the DXL I receive only the error message "DXL Import Operation failed", the error log of the importer says I am not authorized to perform this operation.
Do you have any idea what could be the problem? From my point of view I can't give my User any more rights on the server.
Here is the code for the import function:
private void importDXLFile(String filepath) {
String dxlPath = filepath.replaceAll(".properties", ".dxl");
DxlImporter importer = null;
Stream stream = null;
System.out.println("dxlPath: " + dxlPath);
try {
stream = BCCJsfUtil.getCurrentSessionAsSignerWithFullAccess(FacesContextEx.getCurrentInstance()).createStream();
if (!stream.open(dxlPath, "ISO-8859-1")) {
System.out.println("Cannot read " + dxlPath + " from server");
}
System.out.println("User: " + BCCJsfUtil.getCurrentSessionAsSignerWithFullAccess(FacesContextEx.getCurrentInstance()).getEffectiveUserName());
importer = BCCJsfUtil.getCurrentSessionAsSignerWithFullAccess(FacesContextEx.getCurrentInstance()).createDxlImporter();
importer.setReplaceDbProperties(false);
importer.setReplicaRequiredForReplaceOrUpdate(false);
importer.setDesignImportOption(DxlImporter.DXLIMPORTOPTION_REPLACE_ELSE_CREATE);
importer.setInputValidationOption(DxlImporter.DXLVALIDATIONOPTION_VALIDATE_NEVER);
importer.setExitOnFirstFatalError(false);
importer.importDxl(stream.readText(), BCCJsfUtil.getCurrentDatabase());
stream.close();
} catch (NotesException e) {
e.printStackTrace();
try {
System.out.println("Log: " + importer.getLog());
System.out.println("LogComment: " + importer.getLogComment());
} catch (NotesException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
As you can see I tried several options, hoping it would change anything, but it is always the same error message.
The generated DXL seems valid, as we can import it manually with Ytria.
I hope someone has an idea. Any help would be appreciated.
Thanks in advance.
Matthias

Please check your ACL settings:
Is "Maximum internet name and password" set to "Manager" or "Designer"?

How to pass URL parameters from Java to local HTML file in Windows 7?

I desperately need your expertise in resolving a Windows-7 issue.
Scenario: I have a frame-based Help package that is set up for context-sensitive help calls. A Java application is able to control what page the Help packages opens to by passing a tag representing the desired HTML named anchor to an HTML file called pophelp. This file has javascripting that reads the passed tag from the end of the URL and maps it to the appropriate HTML file in the help package and opens it.
Issue: The above scenario works in Windows XP, but no longer in Windows 7.
Calling mechanism from Java application: rundll32 url.dll,FileProtocolHandler file://filepath/pophelp.html?tag
Summary of findings so far: It appears that url.dll no longer allows parameters to be passed with URLs in Windows 7. Parameters are being stripped. I also tried the same type of call using Desktop.getDesktop().browse() from Java, but it too seems to strip off all parameters after .html.
Sample code:
Original call that works in Windows XP --
Running command: rundll32 url.dll,FileProtocolHandler file://C:\Program Files\App System\App-Editor-8.0.1\help\pophelp.html?TAG=callsubflow
Result: ?TAG=callsubflow is not passed.
New code using Desktop.getDesktop().browse() --
public static void main(String[] args) {
String url = "file:///C:/Program Files/App System/App-Editor-8.0.1/help/pophelp.html?TAG=callsubflow";
try {
if (Desktop.isDesktopSupported()) {
Desktop desktop = Desktop.getDesktop();
if (desktop.isSupported(Desktop.Action.BROWSE)) {
desktop.browse(new URI(url.replace(" ", "%20")));
}
}
} catch (IOException e) {
System.out.println("Unable to open "+url+": "+e.getMessage());
} catch (URISyntaxException e) {
e.printStackTrace();
}
}
Result: ?TAG=callsubflow is not passed.
Any assistance would be appreciated!

I really can't tell why Windows removes parameters on local files. As mentioned in the comments this seams to be some kind of weird restrictions for security. But I once had a similar problem and I found a workaround that fits in this situation as well.
Simply create a local temporary HTML file (without parameters) that redirects you to the desired one (with parameters).Have a look at these two methods:
// creates w3c conform redirect HTML page
public String createRedirectPage(String url){
return "<!DOCTYPE HTML>" +
"<meta charset=\"UTF-8\">" +
"<meta http-equiv=\"refresh\" content=\"1; url=" + url + "\">" +
"<script>" +
"window.location.href = \"" + url + "\"" +
"</script>" +
"<title>Page Redirection</title>" +
"<!-- Note: don't tell people to `click` the link, just tell them that it is a link. -->" +
"If you are not redirected automatically, follow the <a href='" + url + "'>link</a>";
}
// creates temporary file with content of redirect HTML page
public URI createRedirectTempFile(String url) {
BufferedWriter writer = null;
File tmpFile = null;
try {
// creates temporary file
tmpFile = File.createTempFile("pophelp", ".html", null);
// deletes file when the virtual machine terminate
tmpFile.deleteOnExit();
// writes redirect page content to file
writer = new BufferedWriter(new FileWriter(tmpFile));
writer.write(createRedirectPage(url));
writer.close();
}
catch (IOException e) {
return null;
}
return tmpFile.toURI();
}
Now you can use these like this:
String url = "file:///C:/Program Files/App System/App-Editor-8.0.1/help/pophelp.html?TAG=callsubflow";
if (Desktop.isDesktopSupported()) {
Desktop desktop = Desktop.getDesktop();
if (desktop.isSupported(Desktop.Action.BROWSE)) {
desktop.browse(createRedirectTempFile(url.replace(" ", "%20")));
}
}

I have a solution, not a quick (or pretty) solution, but a solution nonetheless :)
rundll32 url.dll,FileProtocolHandler does pass params when using URLs with http/s protocol (try rundll32 url.dll,FileProtocolHandler http://www.google.com?q=google), so you can setup small http server (like Jetty i guess) to serve your help files and show them using
rundll32 url.dll,FileProtocolHandler http://localhost:[helpServerIp]/help/pophelp.html?TAG=callsubflow