Is there some way to run a command line tool from a client-side script? I want to do something like this:
myutility -flag1 -flag2 inputfile outputfile
with a script in the head of an html file. Is there a way to do it, preferably with JS in Safari?
Yes. That script, myutility needs to be compatible with the server machine your webserver is running on, as well as the script needs to have the correct execution rights. Let me know what kind of script it is so that I can help further, is it a bash script you are trying to run? Perhaps you could do that within your server side language, ie php to make things easier?
Related
I have a system that automatically creates and saves documents as html. For further storage they ought to be pdfs though.
I want to avoid having to do it manually so my preferred solution would be a small executable that I can call via command line, feed it with a source and output path (and ideally further parameters) and then let it do its magic. Something in concept like this:
exampleConverter.exe "C:\source\document1.html" "C:\convertedPDFs\document1.pdf"
No UI whatsoever, no human input, no popping up and closing console.
I looked through several options, but common problems I encountered were
the software not being free for commercial use
It just being a library of code, not a ready-to-go executable / code-base you just need to compile into one
The tool needing to get installed instead of being 'portable'
I'd like to avoid having to implement any modern libraries myself, partially for simple time concearns, partially because internally our code runs in a less than modern IE & VBS context so I for see compatibility problems.
Simply triggering a precompiled executable through a generic command line inerface that I can trigger from vbs seems like the perfect solution here.
Your Windows OS program code is almost there, why not reverse input and output (makes the task easier later), with a switch or two. you can embellish that with your for /? loop to run through the current working folder, just like any other program.
Your pseudo code
exampleConverter.exe --print-to-pdf="C:\convertedPDFs\document1.pdf" --headless "C:\source\document1.html"
Working Windows native code
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --print-to-pdf="%CD%\out\document1.pdf" --headless "%CD%\in\document1.html"
Other options are available
learn.microsoft.com suggest this working snippet to run edge with parameters
wscript vbsEdge.vbs
Dim shell
Set shell = WScript.CreateObject("WScript.Shell")
shell.Run "msedge https://www.google.com --hide-scrollbars --content-shell-hide-toolbar"
So just combine the program methods. However, you need to sort out your own arguments.
For greater control then you need to step-up to heavier custom isations https://blogs.windows.com/msedgedev/2015/07/23/bringing-automated-testing-to-microsoft-edge-through-webdriver/ etc.
I am going to use ltrace for some applications like chrome but when I use it, I receive the following error message.
"/usr/bin/google-chrome" is not an ELF file
Does anybody know about the solution? I want to know what functions are exactly called by running an application.
Thanks,
Does anybody know about the solution?
file -L /usr/bin/google-chrome
/usr/bin/google-chrome: Bourne-Again shell script, ASCII text executable
This tells you that google-chrome is a shell script. If you look inside, you'll see that it eventually invokes a real ELF binary (/opt/google/chrome/chrome on my system).
I want to know what functions are exactly called by running an application.
The ltrace command will not show you that. It will only show you what external functions are getting called.
I am trying to execute shell commands or shell script through onclick function in HTML button. For eg:
<button type="button" onclick="/path/to/name.sh">Click Me!</button>
Is there any way to do so or some other way around?
This question has already been asked. Check the below link.
Run a shell script with an html button
The method posted may be feasible with some tweaks in Apache, but it is not the most common way of running a shell script.
If you are using PHP, you can use system(), exec(), popen(), etc... and the path to your file ex:
exec('/path/to/file.sh');
You need to make sure of two things first:
The users you are running as has the proper permissions to execute the shell file.
exec() is not listed as a disabled function in the php.ini (normally, some hosting providers disable them for security issues).
I'm starting a Python script from a Hudson job. The script is started though 'Execute Windows batch command' in build section as 'python my_script.py'
Now I'd need to get some data created by the script back to Hudson and add it to the fail/success emails. My current approach is that the Python script writes data to stderr which is read to a temp file by the batch and then taken into an environment variable. I can see the environment variable correctly right after the script execution (using set command), but in the post-build actions it's not visible any more. The email sending is probably done in different process, so the variables are not visible anymore. I'm accessing the env vars in the email as ${ENV, varname} (or actually in debug mode as $ENV to print them all)
Is there a way to make the environment variable global inside Hudson?
Or can someone provide a better solution for getting data back from Python script to Hudson.
All the related parts (Hudson, batch and Python script) are under my control and can be modified as needed.
Thanks.
Every build step get's is own shell. This implies, that your environment variables are only valid within the build step.
You can just write the data in a nice format to the std output (use a header that is easy to identify) and if the job fails, the data output gets attached in the email.
If you insist on only putting in the data, you can use the following token for the Editable Email Notification post build action (Email-ext plugin).
${BUILD_LOG_REGEX, regex, linesBefore, linesAfter, maxMatches, showTruncatedLines, substText}
I am trying to write a script that will parse a local file and upload its contents to a MySQL database. Right now, I am thinking that a batch script that runs a Perl script would work, but am not sure if this is the best method of accomplishing this.
In addition, I would like this script to run immediately when the data file is added to a certain directory. Is this possible in Windows?
Thoughts? Feedback? I'm fairly new to Perl and Windows batch scripts, so any guidance would be appreciated.
You can use Win32::ChangeNotify. Your script will be notified when a file is added to the target directory.
Checking a folder for newly created files can be implemented using the WMI functionality. Namely, you can create a Perl script that subscribes to the __InstanceCreationEvent WMI event that traces the creation of the CIM_DirectoryContainsFile class instances. Once that kind of event is fired, you know a new file has been added to the folder and can process it as you need.
These articles provide more information on the subject and contain VBScript code samples (hope it won't be hard for you to convert them to Perl):
How Can I Automatically Run a Script Any Time a File is Added to a Folder?
WMI and File System Monitoring
The function you want is ReadDirectoryChangesW. A quick search for a perl wrapper yields this Win32::ReadDirectoryChanges module.
Your script would look something like this:
use Win32::ReadDirectoryChanges;
$rdc = new Win32::ReadDirectoryChanges(path => $path,
subtree => 1,
filter => $filter);
while(1) {
#results = $rdc->read_changes;
while (scalar #results) {
my ($action, $filename) = splice(#results, 0, 2);
... run script ...
}
}
You can easily achieve this in Perl using File::ChangeNotify. This module is to be found on CPAN: http://search.cpan.org/dist/File-ChangeNotify/lib/File/ChangeNotify.pm
You can run the code as a daemon or as a service, make it watch one or more directories and then automatically execute some code (or start up a script) if some condition matches.
Best of all, it's cross-platform, so should you want to switch to a Linux machine or a Mac, it would still work.
It wouldn't be too hard to put together a small C# application that uses the FileSystemWatcher class to detect files being added to a folder and then spawn the required script. It would certainly use less CPU / system resources / hard disk bandwidth than polling the folder at regular intervals.
You need to consider what is a sufficient heuristic for determining "modified".
In increasing order of cost and accuracy:
file size (file content can still be changed as long as size is maintained)
file timestamp (If you aren't running ntpd time is not monotonic)
file sha1sum (bulletproof but expensive)
I would run ntpd, and then loop over the timestamps, and then compare the checksum if the timestamp changes. This can cover a lot of ground in little time.
These methods are not appropriate for a computer security application, they are for file management on a sane system.