Develop Reference

Java saving a file with special characters in file name

I'm having a problem on Java file encoding.
I have a Java program will save a input stream as a file with a given file name, the code snippet is like:
File out = new File(strFileName);
Files.copy(inStream, out.toPath());
It works fine on Windows unless the file name contains some special characters like Ö, with these characters in the file name, the saved file will display a garbled file name on Windows.
I understand that by applying JVM option -Dfile.encoding=UTF-8 this issue can be fixed, but I would have a solution in my code rather than ask all my users to change their JVM options.
While debugging the program I can see the file name string always shows the correct character, so I guess the problem is not about internal encoding.
Could someone please explain what went wrong behind the scene? and is there a way to avoid this problem programmatically? I tried get the bytes from the string and change the encoding but it doesn't work.
Thanks.

Using the URLEncoder class would work:
String name = URLEncoder.encode("fileName#", "UTF-8");
File output = new File(name);

Using the created document trough FPDF with PHP/JAVA

I created a PDF document with PHP using FPDF. The next thing I want to do is silently printing the document without downloading the PDF file to the computer.
I've made the following code:
$pdfprintable = $pdf->Output(''.'.pdf','S');
$printcmd = "java -classpath jPDFPrint.jar;pdfprintcli.jar cli.PDFPrintCLI $pdfprintable";
exec($printcmd);
And it returns the following error message:
Warning: exec(): NULL byte detected. Possible attack in C:\Users\Jordy\Desktop\XAMPP\htdocs\php\stickers\pdf.php on line 392
If I echo the $pdfprintable in PHP it shows a lot of weird characters.

Are you sure the java command is supposed to be used with an hexadecimal string represenation of the PDF ?
use option
$pdfprintable = $pdf->Output('USEAFULLPATHTOFILE.pdf','F');
With the above the PDF is generated and then you can try to print it with the java application if that one works.
Also if you are loading the PDF correctly in FPDF you should be able to use the option D in ->Output
$pdfprintable = $pdf->Output('USEAFULLPATHTOFILE.pdf','D');
Use this to verify the that the PDF is loaded and also managed correctly by FPDF.
Also notice your example code is very limited.
If you need more troubleshooting pls show the Java and the full PHP source relevant to printing operation, loading or creation of the PDF in FPDF

Failed to check if file with German name is exist in the file system

Background:
I have 2 machines: one is running German windows 7 and my PC running English(with Hebrew locale) windows 7.
In my Perl code I'm trying to check if the file that I got from the German machine exists on my machine.
The file name is ßßßzllpoöäüljiznppü.txt
Why is it failed when I do the following code:
use Encode;
use Encode::locale;
sub UTF8ToLocale
{
my $str = decode("utf8",$_[0]);
return encode(locale, $str);
}
if(!-e UTF8ToLocale($read_file))
{
print "failed to open the file";
}
else
{
print $read_file;
}
Same thing goes also when I'm trying to open the file:
open (wtFile, ">", UTF8ToLocale($read_file));
binmode wtFile;
shift #_;
print wtFile #_;
close wtFile;
The file name is converted from German to utf8 in my java application and this is passed to the perl script.
The perl script takes this file name and convert it from utf8 to the system locale, see UTF8ToLocale($read_file) function call, and I believe that is the problem.
Questions:
Can you please tell me what is the OS file system charset encoding?
When I create German file name in OS that the locale is Hebrew in which Charset is it saved?
How do I solve this problem?
Update:
Here is another code that I run with hard coded file name on my PC, the script file is utf8 encoded:
use Encode;
use Encode::locale;
my $string = encode("utf-16",decode("utf8","C:\\TestPerl\\ßßßzllpoöäüljiznppü.txt"));
if (-e $string)
{
print "exists\r\n";
}
else
{
print "not exists\r\n"
}
The output is "not exists".
I also tried different charsets: cp1252, cp850, utf-16le, nothing works.
If I'm changing the file name to English or Hebrew(my default locale) it works.
Any ideas?

Windows 7 uses UTF-16 internally [citation needed] (I don't remember the byte order). You don't need to convert file names because of that. However, if you transport the file via a FAT file system (eg an old USB stick) or other non Unicode aware file systems these benefits will get lost.
The locale setting you are talking about only affects the language of the user interface and the apparent folder names (Programme (x86) vs. Program Files (x86) with the latter being the real name in the file system).
The larger problem I can see is the internal encoding of the file contents that you want to transfer as some applications may default to different encodings depending on the locale. There is no solution to that except being explicit when the file is created. Sticking to UTF-8 is generally a good idea.
And why do you convert the file names with another tool? Any Unicode encoding should be sufficient for transfer.
Your script does not work because you reference an undefined global variable called $read_file. Assuming your second code block is not enclosed in any scope, especially not in a sub, then the #_ variable is not available. To get command line arguments you should consider using the #ARGV array. The logic ouf your script isn't clear anyway: You print error messages to STDOUT, not STDERR, you "decode" the file name and then print out the non-decoded string in your else-branch, you are paranoid about encodings (which is generally good) but you don't specify an encoding for your output stream etc.

File name with Hebrew and English letters arrangment

I have a file name: "אפיון הפצת UCM.doc".
When i write the file from right to left it showes: "UCM.doc אפיון הפצת"
Is there is a way to arrange the String so that the file extension will appear at the end of the string.
Instead of "UCM.doc אפיון הפצת", "doc.UCM אפיון הפצת".
Thanks.

As far as I understand you are confusing with typing in Eclipse or other Java IDE. If you are on Windows just write the string you want in Notepad and then copy and paste it as is into java IDE. Microsoft supports RTL exactly as you are expecting.

Running a JavaScript command from MATLAB to fetch a PDF file

I'm currently writing some MATLAB code to interact with my company's internal reports database. So far I can access the HTML abstract page using code which looks like this:
import com.mathworks.mde.desk.*;
wb=com.mathworks.mde.webbrowser.WebBrowser.createBrowser;
wb.setCurrentLocation(ReportURL(8:end));
pause(1);
s={};
while isempty(s)
s=char(wb.getHtmlText);
pause(.1);
end
desk=MLDesktop.getInstance;
desk.removeClient(wb);
I can extract out various bits of information from the HTML text which ends up in the variable s, however the PDF of the report is accessed via what I believe is a JavaScript command (onClick="gotoFulltext('','[Report Number]')").
Any ideas as to how I execute this JavaScript command and get the contents of the PDF file into a MATLAB variable?
(MATLAB sits on top of Java, so I believe a Java solution would work...)

I think you should take a look at the JavaScript that is being called and see what the final request to the webserver looks like.
You can do this quite easily in Firefox using the FireBug plugin.
https://addons.mozilla.org/en-US/firefox/addon/1843
Once you have found the real server request then you can just request this URL or post to this URL instead of trying to run the JavaScript.

Once you have gotten the correct URL (a la the answer from pjp), your next problem is to "get the contents of the PDF file into a MATLAB variable". Whether or not this is possible may depend on what you mean by "contents"...
If you want to get the raw data in the PDF file, I don't think there is a way currently to do this in MATLAB. The URLREAD function was the first thing I thought of to read content from a URL into a string, but it has this note in the documentation:
s = urlread('url') reads the content
at a URL into the string s. If the
server returns binary data, s will
be unreadable.
Indeed, if you try to read a PDF as in the following example, s contains some text intermingled with mostly garbage:
s = urlread('http://samplepdf.com/sample.pdf');
If you want to get the text from the PDF file, you have some options. First, you can use URLWRITE to save the contents of the URL to a file:
urlwrite('http://samplepdf.com/sample.pdf','temp.pdf');
Then you should be able to use one of two submissions on The MathWorks File Exchange to extract the text from the PDF:
Extract text from a PDF document by Dimitri Shvorob
PDF Reader by Tom Gaudette
If you simply want to view the PDF, you can just open it in Adobe Acrobat with the OPEN function:
open('temp.pdf');

wb=com.mathworks.mde.webbrowser.WebBrowser.createBrowser;
wb.executeScript('javascript:alert(''Some code from a link'')');
desk=com.mathworks.mde.desk.MLDesktop.getInstance;
desk.removeClient(wb);