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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Scripting’ Category

Delay running a script after restart – MikroTik RouterOS

Posted by jpluimers on 2017/10/24

Start Time special value `startup`

Start Time special value `startup`

There is a special startup value for “Start Time” you can enter which makes it runs once 3 seconds after reboot.

If by then your router isn’t fully “up” yet (i.e. waiting for PPPoE or DHCP network settings), then inside the script you can perform a delay global command as shown in the code fragment from the below forum post.

Don’t you love how people still tend to both repeat themselves and abbreviate stuff even though they have code completion at their disposal?:

{:delay 10};
/log print file=([/system identity get name] . "Log-" . [:pick [/system clock get date] 7 11] . [:pick [/system clock get date] 0 3] . [:pick [/system clock get date] 4 6]); \
/tool e-mail send to="xxx@xxx.com" subject=([/system identity get name] . " Log " . \
[/system clock get date]) file=([/system identity get name] . "Log-" . [:pick [/system clock get date] 7 11] . \
[:pick [/system clock get date] 0 3] . [:pick [/system clock get date] 4 6] . ".txt"); :delay 10; \
/file rem [/file find name=([/system identity get name] . "Log-" . [:pick [/system clock get date] 7 11] . \
[:pick [/system clock get date] 0 3] . [:pick [/system clock get date] 4 6] . ".txt")]; \
:log info ("System Log emailed at " . [/sys cl get time] . " " . [/sys cl get date])

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Posted in Development, Internet, MikroTik, Power User, RouterOS, routers, Scripting, Software Development | Leave a Comment »

Windows/*n*x: Getting curl to output HTTP status code – Super User

Posted by jpluimers on 2017/10/24

The first trick works in Windowa and nx (thanks [WayBackpvandenberk):

curl -s -o /dev/null -I -w "%{http_code}" http://www.example.org/

Inside a Windows batch file you need to escape the % to %% so you get this:

curl -s -o /dev/null -I -w "%%{http_code}" http://www.example.org/

The second is slick but only works on nx (thanks [WayBackHeath Borders):

#creates a new file descriptor 3 that redirects to 1 (STDOUT)
exec 3>&1
# Run curl in a separate command, capturing output of -w "%{http_code}" into HTTP_STATUS
# and sending the content to this command's STDOUT with -o >(cat >&3)
HTTP_STATUS=$(curl -w "%{http_code}" -o >(cat >&3) 'http://example.com')

[WayBackGetting curl to output HTTP status code? – Super User

–jeroen

Posted in *nix, *nix-tools, bash, Batch-Files, cURL, Development, Power User, Scripting, Software Development | Leave a Comment »

Mikrotik Router OS 6.37.1 – scripts and schedules – what policies they need to run

Posted by jpluimers on 2017/10/19

minimum schedule and script policies: read/write/policy/test

minimum schedule and script policies: read/write/policy/test

A year later, Mikrotik still needs to update their documentation, so from my question at [WayBack[Mikrotik follow-up needed] Router OS 6.37.1 – scheduled script cannot execute script – MikroTik RouterOS.

TL;DR:

  • use the same policies for scripts and schedules
  • use these policies as a minimum for scripts and schedules:
    • read
    • write
    • policy
    • test

Forum post:

I found out two things:

  1. the testFunctionScript needs at least these policies to call a function: read, write, policy, test
  2. a schedule needs at least the same permissions as a script in order to run the script at all

This is how the various permissions affect the testFunctionScript script:

  • no policies only allow :log info "testFunctionScript"; .
  • read allows the above and :local testFunctionJobs [/system script job print as-value detail]; which then is be logged with :log info "testFunctionJobs=$testFunctionJobs";
  • only write seems equivalent to no policies as it will only allow :log info "testFunctionScript";
  • read and write is equivalent to read
  • a lone policy or test policy (talk about confusion!) do not add functionality, so any combinations of just policy or testwith read and/or write get the same functionality as above
  • policy and test without any other seem equivalent to no policies as they result in only :log info "testFunctionScript"; to execute
  • the combined policies read, write, policy, test allow full script functionality including the function call and using the function call result

The above findings show that more logging is needed: the scheduler should log when (and why!) it does not have enough permissions to run a script. Right now you’re in the dark on when (and why!) a script isn’t ran by the scheduler.

The above findings show that these parts of the documentation need updating:

http://wiki.mikrotik.com/wiki/Manual:Sc … repository (update with info about the above policy combinations)
http://wiki.mikrotik.com/wiki/Manual:Ro … Properties (update with info about the above policy combinations)
http://wiki.mikrotik.com/wiki/Manual:System/Scheduler (does not document anything about policies at all)

The various scripts (apply your mix of policies that you need)

## logon as user jeroenp

/system script environment remove [ /system script environment find where name="testFunction" ];
:global testFunction do={
  :local result [/system resource get uptime];
  :return $result;
}

/system script environment print detail where name=testFunction
# 0 name="testFunction" value=";(eval /system scheduler  (eval /localname=$result;value=(eval (eval /system resource getvalue-name=uptime))) (eval /returnvalue=$result))" 

:log info "direct execution of testFunction"

{
:global testFunction;
:local testFunctionType [:typeof testFunction];
:local testFunctionResult [$testFunction];
:log info "testFunctionScript";
:log info "testFunctionType=$testFunctionType";
:log info "testFunctionResult=$testFunctionResult";
:log info "testFunction=$testFunction";
}

/log print where buffer=memory && (message~"testFunction" || topics~"info")

/system script remove [ /system script find where name="testFunctionScript" ];
/system script add name=testFunctionScript owner=jeroenp policy=ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon source=":global testFunction;\r\
    \n:log info \"testFunctionScript\";\r\
    \n:local testFunctionType [:typeof testFunction];\r\
    \n:local testFunctionResult [\$testFunction];\r\
    \n:log info \"testFunctionType=\$testFunctionType\";\r\
    \n:log info \"testFunctionResult=\$testFunctionResult\";\r\
    \n:log info \"testFunction=\$testFunction\";\r\
    \n"

:log info "execution of testFunction via testFunctionScript"

/system script run testFunctionScript

/log print where buffer=memory && (message~"testFunction" || topics~"info")

/system scheduler remove [ /system scheduler find where name="testFunctionScriptSchedule" ];
/system scheduler add interval=10s name=testFunctionScriptSchedule on-event=testFunctionScript policy=ftp,reboot,read,write,policy,test,password,sniff,sensitive start-date=sep/22/2015 start-time=12:02:37

:log info "execution of testFunction via testFunctionScriptSchedule calling testFunctionScript"
:delay 20s
/system scheduler disable testFunctionScriptSchedule

/log print where buffer=memory && (message~"testFunction" || topics~"info")

/system scheduler print detail where name="testFunctionScriptSchedule"

–jeroen

Posted in Development, Internet, MikroTik, Power User, RouterOS, routers, Scripting, Software Development | Leave a Comment »

Is there a standard function to check for null, undefined, or blank variables in JavaScript? – Stack Overflow

Posted by jpluimers on 2017/10/11

Yes there is; it’s the answer below. Note I needed to exclude false by adding a check value === false to the code below as that was a valid value for me.

You can just check if the variable has a truthy value or not. That means

if( value ) {
}

will evaluate to true if value is not:

  • null
  • undefined
  • NaN
  • empty string (“”)
  • 0
  • false

The above list represents all possible falsy values in ECMA-/Javascript. Find it in the specification at the ToBoolean section.

Furthermore, if you do not know whether a variable exists (that means, if it was declared) you should check with the typeof operator. For instance

if( typeof foo !== 'undefined' ) {
    // foo could get resolved and it's defined
}

If you can be sure that a variable is declared at least, you should directly check if it has a truthyvalue like shown above.

Further read: http://typeofnan.blogspot.com/2011/01/typeof-is-fast.html

Thanks to [WayBackUser jAndy – Stack Overflow who answered the above at [WayBackIs there a standard function to check for null, undefined, or blank variables in JavaScript? – Stack Overflow.

–jeroen

Posted in Development, JavaScript/ECMAScript, Scripting, Software Development | Leave a Comment »

How do I make the first letter of a string uppercase in JavaScript? – Stack Overflow

Posted by jpluimers on 2017/10/11

I’m a JavaScript n00b, so I like solutions like these:

Another solution:

function capitalizeFirstLetter(string) {
    return string.charAt(0).toUpperCase() + string.slice(1);
}

You could also add it to the String.prototype so you could chain it with other methods:

String.prototype.capitalizeFirstLetter = function() {
    return this.charAt(0).toUpperCase() + this.slice(1);
}

and use it like this:

'string'.capitalizeFirstLetter() // String

Thanks [WayBackHutch Moore and [WayBackDeviljho for answering at [WayBackHow do I make the first letter of a string uppercase in JavaScript? – Stack Overflow!

Note you can do it in CSS too as explained by [WayBacksam6ber:

In CSS:

p:first-letter {
    text-transform:capitalize;
}

–jeroen

Posted in CSS, Development, JavaScript/ECMAScript, Scripting, Software Development, Web Development | Leave a Comment »

nojhan/liquidprompt: A full-featured & carefully designed adaptive prompt for Bash & Zsh

Posted by jpluimers on 2017/10/05

Wow: nojhan/liquidprompt: A full-featured & carefully designed adaptive prompt for Bash & Zsh

This is really useful!

via:

Sort of tanslated from the first “via” (note that “mit Alles und Scharf” is hard to translate; it’s somewhere between “everything but the kitchen sink, but done right” and “right on the money”):

Bash Prompt Overkill: https://github.com/nojhan/liquidprompt is a Bash “Prompt doing it all right”-extension, which doesn’t care how much any feature costs as we have cores, gigabytes and SSD.

Liquid Prompt automagically recognises context and enables a plethora of features in the prompt when needed based on that context.

It’s like pixie dust for your prompt.

You can configure everything, but you don’t have to: the out of the box experience is already like pixie dust for your prompt.

It works on OS X too and is part of homebrew:

$ brew install liquidprompt
==> Using the sandbox
==> Downloading https://github.com/nojhan/liquidprompt/archive/v_1.11.tar.gz
==> Downloading from https://codeload.github.com/nojhan/liquidprompt/tar.gz/v_1.11
######################################################################## 100.0%
==> Caveats
Add the following lines to your bash or zsh config (e.g. ~/.bash_profile):
  if [ -f /usr/local/share/liquidprompt ]; then
    . /usr/local/share/liquidprompt
  fi
If you'd like to reconfigure options, you may do so in ~/.liquidpromptrc.
A sample file you may copy and modify has been installed to
  /usr/local/share/liquidpromptrc-dist
Don't modify the PROMPT_COMMAND variable elsewhere in your shell config;
that will break things.
==> Summary
🍺  /usr/local/Cellar/liquidprompt/1.11: 7 files, 125.6K, built in 3 seconds
[jeroenp:~/Versioned] 10s $

–jeroen

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Posted in *nix, *nix-tools, Apple, bash, bash, Development, Mac OS X / OS X / MacOS, Power User, Scripting, Software Development | Leave a Comment »

Visual Studio Code – getting started – some links

Posted by jpluimers on 2017/10/05

It might sound like I’m late in the game, but remember that blog posts are usually scheduled like a year in advance.

So I found out a long time ago (I think it’s Matthijs ter Woord who attended me) about Visual Studio Code.

At the start [WayBack] it was more limited (from memory something like C#, TypeScript, Java Script languages and frameworks Node.js and ASP.NET 5) than my other development environments but now it’s much richer.

It’s based on the Electron framework which I kew from the Atom.io editor and Koush‘s framework Electron Chrome that wraps Chrome Apps in Electron so he ensured Vysor would live after Google will kill Chrome Apps.

Oh it’s free and runs multi-platform which I like a lot (and was one of the reasons to start using Atom.io): Mac OS X, Windows and Linux are supported.

So here are a few links to get started:

I got reminded a while back** that it is now supported by OmniPascal [WayBack] which I like because of my Turbo Pascal -> VAX/VMS -> csh -> Delphi -> AS/400 -> .NET background.

Like Visual Studio Code is updated often, the Omni Pascal blog [WayBack] shows regular updates and I like it a lot better than the Lazarus IDE (I’m not a visual RAD person: I’m a RAD code person) especially the refactorings.

So start playing with it. I will post more about my Visual Studio Code experience in due time.

–jeroen

** via [WayBackFinally: OmniPascal 0.11.0 released – Implement an interface via key stroke …

Posted in .NET, ASP.NET, C#, Delphi, Development, JavaScript/ECMAScript, Node.js, Omni Pascal, Pascal, Scripting, Software Development, TypeScript, Visual Studio and tools, vscode Visual Studio Code | 1 Comment »

Mikrotik – viewing when users logged in/out (on/off) when logging is high-volume

Posted by jpluimers on 2017/09/27

When logging on a Mikrotik is high-volume, then you need to have either:

  • separate logging actions (they end up in logging buffers each having the same name as the action) and logging rules for specific information that you want to retain
  • log to file in stead of memory

Since my devices have plenty memory, I made a separate accountAction with a rule sending the topic account to accountAction which I then can query like either of these:

/log print detail where message~"logged"

/log print detail where message~"logged" && buffer=accountAction

Here is the /system logging export condensed result:

/system logging action add name=accountAction target=memory
/system logging add action=accountAction topics=account

–jeroen

Posted in Development, Internet, MikroTik, Power User, RouterOS, routers, Scripting, Software Development | Leave a Comment »

Use deep learning to 4x your photo’s resolution As seen on TV! After a bit of neural network training…

Posted by jpluimers on 2017/09/26

Via Use deep learning to 4x your photo’s resolutionAs seen on TV! What if you could increase the resolution of your photos using technology from CSI labs… – Joe C. Hecht – – Google + [WayBack]

Use deep learning to 4x your photo’s resolution

As seen on TV! What if you could increase the resolution of your photos using technology from CSI laboratories? Thanks to deep learning and #NeuralEnhance, it’s now possible to train a neural network to zoom in to your images at 2x or even 4x. You’ll get even better results by increasing the number of neurons or training with a dataset similar to your low resolution image. The catch? The neural network is hallucinating details based on its training from example images. It’s not reconstructing your photo exactly as it would have been if it was HD. That’s only possible in Hollywood — but using deep learning as “Creative AI” works and its just as cool! Here’s how you can get started..

Posted in Development, Power User, Python, Scripting, Software Development | Leave a Comment »

Need to write a proper bookmarklet for the wayback archive (:

Posted by jpluimers on 2017/09/14

Some inspiration for writing a proper bookmarklet that finds or saves a WayBack machine page:

On the last link, I was hoping that the https://web.archive.org/liveweb/https://www.example.org would work but it doesn’t work for many URLs and I’m not sure yet why that is.

It has a nice tip that works though:

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Posted in Bookmarklet, Conference Topics, Conferences, Development, Event, JavaScript/ECMAScript, Power User, Scripting, Software Development, Web Browsers | Leave a Comment »