systeminformation | System Information Library for Node.JS | Runtime Evironment library
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System and OS information library for node.js Explore Systeminformation docs » Report bug · Request feature · Changelog.
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systeminformation Examples and Code Snippets
webPreferences: {
nodeIntegration: true,
nodeIntegrationInWorker: true
}
import sysInfoWorker from 'worker-loader!./workers/sysInfoWorker'
data () {
return {
sysInfoWorker: null
}
},
mounted () {
thi
Community Discussions
Trending Discussions on systeminformation
QUESTION
Other than the usual suspects (process.exit()
, or process termination/signal, or crash/hardware failure), are there any circumstances where code in a finally block will not be reached?
The following typescript code usually executes as expected (using node.js) but occasionally will terminate immediately at line 4 with no exceptions being raised or change in the process exit code (exits 0/success):
...ANSWER
Answered 2021-Mar-12 at 02:03Other than the usual suspects (process.exit(), or process termination/signal, or crash/hardware failure), are there any circumstances where code in a finally block will not be reached?
If the promise will resolve or reject in future then it should reach to the final block.
According to the MDN docs,
The
finally
-block contains statements to execute after thetry
-block andcatch
-block(s) execute, but before the statements following thetry...catch...finally
-block. Note that thefinally
-block executes regardless of whether an exception is thrown. Also, if an exception is thrown, the statements in thefinally
-block execute even if nocatch
-block handles the exception.
A promise is just a JavaScript object. An object can have many states. A promise object can be in pending
state or settled
state. The state settled
can divide as fulfilled
and rejected
. For this example just imagine we have only two state as PENDING
and SETTLED
.
Now if the promise never resolve or reject then it will never go to the settled
state which means your then..catch..finally
will never call. If nothing is reference to the promise then it will just garbage collected.
In your original question you mentioned about a 3rd party async method. If you see that code, the first thing you can see is, there are set of if(..)
blocks to determine the current OS.
But it does not have any else
block or a default case.
What if non of the if(..)
blocks are trigger ? There is nothing to execute and you already returned a promise with return new Promise()
. So basically if non of the if(..)
blocks are triggered, the promise will never change its state from pending
to settled
.
And then as @Bergi also mentioned there are some codes like this. A classic Promise constructor antipattern as he mentioned. For example see the below code,
QUESTION
I am trying to use a npm package in cljs called "systeminformation"
most of its function are async and some are non-async
but I am unable to use async function, everything else work fine
RELATED IMPORTS
ANSWER
Answered 2021-May-31 at 13:15Async functions in JS are syntax sugar for functions returning a Promise
.
core.async
does not work with Promises by default and you need to use the helper function to make them act like channels if you want to. The macro does this for you.
QUESTION
So I have a program that I want to start minimised in the notification tray in Windows. I've got the program to do that if I manually launch it from the start menu but I'm having an issue where if I try to start it using Task Scheduler it will start not minimised.
...ANSWER
Answered 2021-Apr-17 at 18:41It's best to always use a full path for files as then you can be sure that it is looking where you want it to look.
You can use the filename returned by:
IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), "yourProgramsDataDirectoryGoesHere", "enabled")
That and the other Windows "special folders" known to .NET are listed in Environment.SpecialFolder Enum.
Another thing to check for is that the account the task is running under has permission to access the file.
[Also, to create a file it's easier to use IO.File.WriteAllText(fullPathToTheFile, "")
as then you don't have to remember to call .Dispose()
on the FileStream.]
QUESTION
I am currently running the code :
...ANSWER
Answered 2021-Mar-24 at 12:21if you are using typegoose
(7.0 or later), then what you currently have should be enough, if you have emitDecoratorMetadata
enabled in the tsconfig
example with typegoose (the code below uses option extensions from ~7.4):
QUESTION
I am working on a NestJS backend with Mongo but I am experiencing difficulties with the mongo references.
Let me explain the situation a bit more. I have class called SystemInformation that contain fields like when was the object created or by who. All the other schema of the application extend this class. The field "createdBy" is a references to the User schema (that also extend SystemInformation). When I am saving an object the payload contain the id of the user who created the record. But when I look at the mongo database from Compass I see the field as a string, but never as a ref with the official format which look like :
...ANSWER
Answered 2021-Mar-14 at 13:24but never as a ref with the official format which look like
mongoose dosnt use such an format, mongoose references work by saving the id directly as the type that it is on the target schema (objectid for objectid, string for string), and to look up which db an id is assigned, it probably uses the model on what connection & db it is created on
PS: typegoose references can be expressed with public property: Ref
PPS: the official typegoose type to combine TargetClass
and Document
is called DocumentType
QUESTION
I have a windows form (setup project) that I developed in c#. Since some users in the domain are not authorized to install the program, they need to right click on the exe and select run as administrator and install. For the exe to run when the computers are rebooted, I assign the startup folder as follows:
...ANSWER
Answered 2021-Mar-01 at 21:31You might try WMI and see if this works (if you don't have it referenced there is a Nuget package for it).
QUESTION
I'm trying to simulate mouse input using SendInput
, however I need to determine the virtual screen width in case there are multiple monitors, to set the dx
and dy
values, for example:
ANSWER
Answered 2021-Mar-02 at 08:05By default, Windows applies DPI virtualization to all coordinates.
If you have 2 displays, secondary FullHD on the left with 100% scaling, and primary 4k on the right with 200% DPI scaling, the APIs for screen configuration gonna tell you the desktop has 3840x1080 pixels, the secondary one from [-1920 .. 0], the primary one [0 .. 1920]. To simulate mouse input at the center of the left monitor, you should use X coordinate -960 * 0x10000 / 1920 = -32768 without MOUSEEVENTF_VIRTUALDESK
flag, or 960 * 0x10000 / 3840 = 16384 with MOUSEEVENTF_VIRTUALDESK
flag
You can tell Windows to stop messing with DPI in your application, with a manifest.
If you do that on the same computer, the APIs for screen configuration gonna tell you the desktop has 5760x2160 pixels, the secondary one is the same, in [-1920 .. 0 ], the primary one [ 0 .. 3840 ]. To send mouse input to the center of the left monitor in this case, you should use X coordinate -960 * 0x10000 / 3840 = -16384 without MOUSEEVENTF_VIRTUALDESK
flag, or 960 * 0x10000 / 5760 = 10923 with MOUSEEVENTF_VIRTUALDESK
flag.
QUESTION
So, I'm learning svelte + sapper, and I want to use systeminformation to retrieve detailed hardware, system and OS information.
I installed it with ' npm i systeminformation ' and it shows on node_modules, but I don't know how to use/require/import it. For example, I want to see my cpu information, but I don't know how to use it on my .svelte file.
This is what I want to use:
https://www.npmjs.com/package/systeminformation
https://systeminformation.io/gettingstarted.html
I'm so sorry if this is a really noob question, and thank you so much for any help in advance!!!
Also, english is not my main language, so... sorry if i could not express my doubt properly.
Thank you again!
:D
ANSWER
Answered 2021-Feb-05 at 13:11systeminformation is purely for node and will not work in the browser, at most it might work in a server route for sapper but even then it will only give you information about the server you are running
it will not work in a .svelte
component.
QUESTION
I have a project that uses NW.js in conjunction with Vue.js. The problem is that I can't include systeminformation module to the Vue.js because according to the documentation (see the core concept section) this lib doesn't work from inside the chromium but only on a server-side. How to include this lib in nw.js to make it available globally so I can use it from inside the vue code?
I've been using a solution that seemed to work but recently I figured out that it isn't. What I've been doing - I included script right in the ./public/index.html and it works on dev but not on the build. When I build the app and move it to another place it just can't find the path to the systeminformation package.
...ANSWER
Answered 2021-Feb-02 at 02:27It depends on the way you are using Vue. If you are doing a simple "CDN" style then look at this example:
The README in that repo will give step-by-step instructions.
If you are using the Vue-CLI style, then this should work:
That repo is a complete boilerplate for Vue-CLI + NW.js
QUESTION
I tried to create a screenshot function, set the "Canvas" background as a picture, press and raise the mouse to draw a rectangle, and capture the content inside the rectangle, but my mouse up event is always invalid. I searched all kinds of information and tried, all of them seem to be invalid
...ANSWER
Answered 2020-Dec-18 at 00:53- Mouseup is invalid because you have drawn a Rectangle on cancas.When mouseup is triggered on Rectangle, the mouseup of Cancas cannot be triggered.
- I tested and found no PreviewMouseUp on Cancas either.
- I used a different solution to your problem.
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Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install systeminformation
simple to use
get detailed information about system, cpu, baseboard, battery, memory, disks/filesystem, network, docker, software, services and processes
supports Linux, macOS, partial Windows, FreeBSD, OpenBSD, NetBSD, SunOS and Android support
no npm dependencies
If you need version 4 (for compatibility reasons), you can install version 4 (latest release) like this.
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