I have an html file with this path: /home/kevedvoc/index.html
In my C program am scanning the user's input, and if they say "open doc", I want to open this html file on chrome or firefox or whatever browser. I just need it to appear.
How can I do that. Is it doable?
Thank you for your help.
It has been a while, but if I remember right, you can use int system(const char *command) found in stdlib.h.
system("firefox <url>"); // "firefox.exe" on Windows.
system("chrome <url>"); // "chrome.exe" on Windows.
system makes a call to execl found in unistd.h, so you could also call that directly.
Related
I am taking a class on using Octave for machine learning algorithms, and as part of the assignments, they provide a series of .m files to build upon with our own code as well as to run for submission credit through the auto-grader. My problem is that the .m files load perfectly fine in a regular text editor program like Atom or Notepad, but in Octave, the files are best described as nonsense, and thus will not run in the console. If I open the files in a regular editor and copy/paste over the crazy into Octave, it seems to save it and reopen fine. But, I have close to 20 files for the first project alone, and this solution is untenable in the long run. I have a screenshot of how it's loading. Is there some setting I need to change? Uninstall/reinstall Octave? I'm new to Octave and the Octave GUI, and I'm striking out with Google for a solution. I am using version 6.2.0. Thank you for any help/advice!
screenshot of how octave is loading my .m files
Update: I responded to this in a comment below, but I tried loading it another way into Octave GUI and received the following error: ">> error: load: unable to determine file format of 'C:/Users/sophi/documents/octave/assignment_1/computeCost.m" This tracks for me because it makes sense why it would open the files in such a weird way. It's simply not sure what they are. However, I created my own simple functions from scratch to test, saved them as .m files, and was able to run them perfectly fine. I'm including one of the files below. Maybe there's a key in the formatting of the files offered by the class which is impacting Octave's ability to process it correctly?
function plotData(x, y)
%PLOTDATA Plots the data points x and y into a new figure
% PLOTDATA(x,y) plots the data points and gives the figure axes labels of
% population and profit.
figure; % open a new figure window
% ====================== YOUR CODE HERE ======================
% Instructions: .... goes on about assignment
% ============================================================
end
MOST RECENT UPDATE: The plot thickens. Yesterday, I was able to open the files I created and run them in the Octave environment, and I (wrongly) assumed they would still work today. They are doing the same stupid thing as the files included by the course. I checked inside preferences for the editor, and it says it is loading and saving them as IBM273 if that helps. Thank you for everyone has pitched in ideas. I really appreciate it!
It was 100% the encoding. I thought it was strange it was saving/loading in IBM273, so I switched it to UTF-8. Almost all the files are working now. The only ones that aren't are the ones I was trying to copy/paste yesterday to see what was going on with the load problems and the basic new problems I wrote. So I deleted everything, redownloaded, and set the default UTF-8 going forward and voila! Solved! Thanks again!
If you want to open a .m file in octave, Try this solution
It is necessary to declare a current directory before saving a file, loading a file, or running an M-file. By default, unless you edit the Octave shortcut, the current directory will be .../Octave/work. After you start Octave, change the current directory by either using the toolbar at the left-hand side of the screen, or entering the path in the bar at the top.
To open an .m file, you can use file -> open, or type
open filename
Given a url, my application tries to download the file, e.g., http://foo.com/bar.bat will download bar.bat
Now, given a version number at the end delimited by semi-colon, my application will retrieve that particular version from my source control and download the file.
For e.g., http://foo.com/bar.bat;1 should download bar.bat version 1.
http://foo.com/bar.bat;2 should download bar.bat version 2 etc.
Problem:
Chrome downloads the right version as bat file.
IE (am using IE 11) and firefox downloads the right version but considers 'bat;1' or 'bat;2' as the file type instead of 'bat'.
I have mime type as application/bat. I tried with '%3b' instead of ';' but same issue.
No idea what else to check.
Any help would be appreciated.
Why don't you use http://foo.com/bar.bat?version=1 instead? this should work on every browser properly because it is a standard.
I resolved the issue by making a code change in Perl (with Google's assistance, of course).
In case, anyone intererested or face this problem in future, here is what i did.
In perl code, redirect to http://foo.com/bar.bat;1 was happening with relative path.
print $query->redirect(-uri => $redirect); # $redirect being '/bar.bat;1'
I gave absolute path like below
my $RemoteHost = $query->url(-base=>1); #this gets http://foo.com
my $newredirect = "$RemoteHost$redirect";
print $query->redirect(-uri => $newredirect);
I will mark erikvold's as answer since he triggered me to look at the perl code.
Thanks Jonathan and erikvold.
I'm running Windows 8. I have a file named "test.tcl".
If I open a shell, type "wish", then 2 windows open. In one of them, I can type Tcl code and open the file test.tcl. If I open this file, its code is executed.
If I double click on test.tcl to open the file with "Wish Application", then 1 blank window open, and nothing happens.
Do you know why please?
On Windows, Wish is built as a GUI-only application; it has no real standard output available. Tk fakes one for you though; just put this in your script to show the fake console:
console show
The fake console shows up by default when you launch without a script file, but launching with a script file doesn't show it (so your script file can implement an application, of course).
This can catch people out when they produce a lot of output on stdout. Tk may well be keeping it all faithfully just in case the code does console show later on, though it looks and smells a lot like a memory leak if you're not prepared for it…
Does anyone know of a way to save the console.log output in Chrome to a file? Or how to copy the text out of the console?
Say you are running a few hours of functional tests and you've got thousands of lines of console.log output in Chrome. How do you save it or export it?
Good news
Chrome dev tools now allows you to save the console output to a file natively
Open the console
Right-click
Select "save as.."
Chrome Developer instructions here.
I needed to do the same thing and this is the solution I found:
Enable logging from the command line using the flags:
--enable-logging --v=1
This logs everything Chrome does internally, but it also logs all the console.log() messages as well. The log file is called chrome_debug.log and is located in the User Data Directory which can be overridden by supplying --user-data-dir=PATH (more info here).
Filter the log file you get for lines with CONSOLE(\d+).
Note that console logs do not appear with --incognito.
I have found a great and easy way for this.
In the console - right click on the console logged object
Click on 'Store as global variable'
See the name of the new variable - e.g. it is variableName1
Type in the console: JSON.stringify(variableName1)
Copy the variable string content: e.g. {"a":1,"b":2,"c":3}
Go to some JSON online editor:
e.g. https://jsoneditoronline.org/
There is an open-source javascript plugin that does just that, but for any browser - debugout.js
Debugout.js records and save console.logs so your application can access them. Full disclosure, I wrote it. It formats different types appropriately, can handle nested objects and arrays, and can optionally put a timestamp next to each log. You can also toggle live-logging in one place, and without having to remove all your logging statements.
For better log file (without the Chrome-debug nonsense) use:
--enable-logging --log-level=0
instead of
--v=1 which is just too much info.
It will still provide the errors and warnings like you would typically see in the Chrome console.
update May 18, 2020: Actually, I think this is no longer true. I couldn't find the console messages within whatever this logging level is.
This may or may not be helpful but on Windows you can read the console log using Event Tracing for Windows
http://msdn.microsoft.com/en-us/library/ms751538.aspx
Our integration tests are run in .NET so I use this method to add the console log to our test output. I've made a sample console project to demonstrate here: https://github.com/jkells/chrome-trace
--enable-logging --v=1 doesn't seem to work on the latest version of Chrome.
For Google Chrome Version 84.0.4147.105 and higher,
just right click and click 'Save as' and 'Save'
then, txt file will be saved
A lot of good answers but why not just use JSON.stringify(your_variable) ? Then take the contents via copy and paste (remove outer quotes). I posted this same answer also at: How to save the output of a console.log(object) to a file?
There is another open-source tool which allows you to save all console.log output in a file on your server - JS LogFlush (plug!).
JS LogFlush is an integrated JavaScript logging solution which include:
cross-browser UI-less replacement of console.log - on client side.
log storage system - on server side.
Demo
If you're running an Apache server on your localhost (don't do this on a production server), you can also post the results to a script instead of writing it to console.
So instead of console.log, you can write:
JSONP('http://localhost/save.php', {fn: 'filename.txt', data: json});
Then save.php can do this
<?php
$fn = $_REQUEST['fn'];
$data = $_REQUEST['data'];
file_put_contents("path/$fn", $data);
Right-click directly on the logged value you want to copy
In the right-click menu, select "Store as global variable"
You'll see the value saved as something like "temp1" on the next line in the console
In the console, type copy(temp1) and hit return (replace temp1 with the variable name from the previous step). Now the logged value is copied to your clipboard.
Paste the values to wherever you want
This is especially good as an approach if you don't want to mess with changing flags/settings in Chrome and don't want to deal with JSON stringifying and parsing etc.
Update: I just found this explanation of what I suggested with images that's easier to follow https://scottwhittaker.net/chrome-devtools/2016/02/29/chrome-devtools-copy-object.html
These days it's very easy - right click any item displayed in the console log and select save as and save the whole log output to a file on your computer.
On Linux (at least) you can set CHROME_LOG_FILE in the environment to have chrome write a log of the Console activity to the named file each time it runs. The log is overwritten every time chrome starts. This way, if you have an automated session that runs chrome, you don't have a to change the way chrome is started, and the log is there after the session ends.
export CHROME_LOG_FILE=chrome.log
the other solutions in this thread weren't working on my mac. Here's a logger that saves a string representation intermittently using ajax. use it with console.save instead of console.log
var logFileString="";
var maxLogLength=1024*128;
console.save=function(){
var logArgs={};
for(var i=0; i<arguments.length; i++) logArgs['arg'+i]=arguments[i];
console.log(logArgs);
// keep a string representation of every log
logFileString+=JSON.stringify(logArgs,null,2)+'\n';
// save the string representation when it gets big
if(logFileString.length>maxLogLength){
// send a copy in case race conditions change it mid-save
saveLog(logFileString);
logFileString="";
}
};
depending on what you need, you can save that string or just console.log it and copy and paste. here's an ajax for you in case you want to save it:
function saveLog(data){
// do some ajax stuff with data.
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function(){
if (this.readyState == 4 && this.status == 200) {}
}
xhttp.open("POST", 'saveLog.php', true);
xhttp.send(data);
}
the saveLog.php should append the data to a log file somewhere. I didn't need that part so I'm not including it here. :)
https://www.google.com/search?q=php+append+to+log
This answer might seem specifically related, but specifically for Network Log, you can visit the following link.
The reason I've post this answer is because in my case, the console.log printed a long truncated text so I couldn't get the value from the console. I solved by getting the api response I was printing directly from the network log.
chrome://net-export/
There you may see a similar windows to this, just press the Start Logging to Disk button and that's it:
Create a batch file using below command and save it as ChromeDebug.bat in your desktop.
start chrome --enable-logging --v=1
Close all other Chrome tabs and windows.
Double click ChromeDebug.bat file which will open Chrome and a command prompt with Chrome icon in taskbar.
All the web application logs will be stored in below path.
Run the below path in Run command to open chrome log file
%LocalAppData%\Google\Chrome\User Data\chrome_debug.log
I'm generating an HTML report by C# to print pairs of files in a table which has 3 columns: the first two columns used for the filenames and the 3rd column is a hyperlink Compare - I want this link to run WinMerge to compare to two files and I currently don't know how to do it.
Try this
<html>
<head>
<script type="text/javascript">
function runProgram()
{
var shell = new ActiveXObject("WScript.Shell");
var appWinMerge = "\"C:\\Program Files\\WinMerge\\WinMergeU.exe\" /e /s /u /wl /wr /maximize";
var fileLeft = "\"D:\\Path\\to\\your\\file\"";
var fileRight= "\"D:\\Path\\to\\your\\file2\"";
shell.Run(appWinMerge + " " + fileLeft + " " + fileRight);
}
</script>
</head>
<body>
Run program
</body>
</html>
Sorry this answer sucks, but you can't launch an just any external application via a click, as this would be a serious security issue, this functionality isn't available in HTML or javascript. Think of just launching cmd.exe with args...you want to launch WinMerge with arguments, but you can see the security problems introduced by allowing this for anything.
The only possibly viable exception I can think of would be a protocol handler (since these are explicitly defined handlers), like winmerge://, though the best way to pass 2 file parameters I'm not sure of, if it's an option it's worth looking into, but I'm not sure what you are or are not allowed to do to the client, so this may be a non-starter solution.
The reasonable way how to launch apps from HTML is through url schemes. So you can launch email via mailto: links and irc through irc: links. Individual apps can implement these schemes, but I'm not sure WinMerge does this.
Make a batch file and call the bacth file in Window.open. Here how it works
make a file in notepad
write your script : start wmplayer "\dotnet\sc\1234.mp4" /fullscreen
save as : test.bat in \dotnet\sc\test.bat
in html
window.open('file://dotnet/sc/test.bat')
Enjoy..
I've wrote a small extension to do so.
Since you are creating the page using C# you may want to implement this:
https://github.com/felix-d-git/DesktopAppLink
Basically u are creating some registry entries to parse the links you click in your html page.
The browser will then ask to open the specified app.
C#:
DesktopAppLink.CreateLink("applink.sample", "\"<path to exe>\"", "");
HTML:
Run Desktop App
Result: