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What is the best script to use for showing the current visitors or guests Online?
Thanks!
As #Ryan Smith suggested, this greatly depends on the implementation details of the website. I'm sure that there is a off-the-shelf framework offering a storefront application with all the bells and whistles (such as the types of scripts you are mentioning); however, these can range anywhere from being free and open source, or very expensive.
Implementing a script like this yourself isn't very difficult. Assuming that you're keeping track of the users on the website in some form of data store (typically a backend database) you could do something like this:
When the page loads, fire a JavaScript that makes an Ajax request
Have the page that's the target of the Ajax request select a count of the number of rows in the table storing the active users. Return this result.
When the request completes, have the Ajax callback insert the number into the DOM in whatever place you'd like.
You can set this process to repeat at certain intervals so that the pages containing the script are dynamically updated showing a relatively up to date count of the number of users online.
I think it all depends on how your tracking who's online within your application.
Usually, when someone logs-in, you create a session for them that you could iterate through based on whatever language you are using.
You have to keep in mind that HTTP is a stateless environment, so determining when someone is online is largely subjective as to your opinion as to how long ago they logged in.
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I have a view counter on my website that plots the time spent by a viewer on the site to a Thingspeak chart. I want it to not count my views. So it should detect me. I could maybe change the value of a boolean in Console but that isnt feasible. I thought about storing a cookie on my computer and the website would read it to see if it's me but then its crossite samesite stuff I don't understand. Then I thought about checking if the viewer's IP address is mine. Apparently you need server-side stuff for that and GitHub doesn't allow that. Any more ideas?
A really simple hacky solution without using IP checking / backend logic would be to set a localStorage value to something that shouldn't exist normally. With the site loaded, open your browser console and assign something, eg
localStorage.userIsIshanGoel = 'yes';
Then, in the script on your page, just check that property before running the code that increments the view count:
if (localStorage.userIsIshanGoel !== 'yes') {
incrementViewCount();
}
It's not foolproof - for example, someone could examine the source code of the page and set the property themselves, but if the view count is just for your personal informational use, that's quite unlikely to happen (and even then, that's only a single user).
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I wrote a small code in c# that reads files from the hard drive and outputs that info to a webpage using asp.net.
Information about those files is being changed in the codebehind.
I managed to create variables to read and display the info on the webpage, but they change only after a refresh. When I used setTimeout it would always read the same variable, leaving me thinking that the codebehind does not get re-executed.
How would it be possible to have them updated live without needing to refresh the entire page?
This is somewhat vague but if you want updates to the values on your page after loading, you'll need to use some javascript to grab new values and then more javascript to update values on your page.
There are some great frameworks out there. Unless you have a lot of front-end logic you need to perform through javascript, I'd keep it as simple as possible and throw jQuery in there for the AJAX calls (fyi, this is not the only solution, there are 10+ different ways to skin this same cat).
If you want a bit more efficiency, you could look into using SignalR - which wraps long polling or web sockets (depending on browser capability) on the front end and signals those subscribing pages on the backend only when changes have occurred to data.
Link: http://www.asp.net/signalr
There is no "right" answer to your question so the best I or anybody can do is guide you in a direction. Hopefully this answer helps you.
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I have been searching across the Web to find a solution to this:
Basically what I want to setup is a way to have an HTML page on a live production site to kept updated. This is because I have setup a SilverStripe Application as part of a graphics system (green chroma key) that runs through normal HTML.
AJAX load doesn't seem to be an option here since the load would be every 1 second or half a second to make sure the page is live.
I looked into web socket quite vaguely but the whole concept of integrating it with my project confused me entirely.
Anyone got any ideas of what could be done?
To do this you'll need a combination of:
AJAX, you'll need to never do a full page load after the initial Web 1.0 request.
Session history management, you'll need this in order to not break the browser navigation (e.g. back/forward buttons).
Web Sockets, you'll need this so when new content arrives on the server it is received by the client without first having to poll the server.
Web sockets will be the greatest challenge. I listed them in the order in which you should approach the project, in three phases.
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I am creating a PHP application, where I want one user make a database entry. It should be reflected to all the users whoever have this app open on their browser will get instant notification that some data has been updated on the database or with whatever data has been inserted.
Is there any way I can get real time notification of data inserted or updated? On all the opened browser without any delay.
We use AJAX for now. But it seems like our application is now working slow due to continues request. Any other way? Which is free.
Thank you!
Take a look at Pusher (https://pusher.com/). It does what you want to achieve and it works like a charm.
I don't know what do you use on your server side but even if it isn't Laravel, take a look at Jeffrey's Laracast about implementing real time notifications in Laravel (PHP). https://laracasts.com/lessons/pusher-awesomeness
Have a fun! When I did it, my app became extremely sexy. Real time notifications, DOM manipulations etc.
You can use web sockets. One existing library example for PHP is Ratchet.
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Hi I am trying to develop a mobile app. The problem I am having is this, when the user fills in a form on the html page I want the data to get written to an unordered list on the same page. I want when the next user fills data for that dat to get written to the second list item in the list and so on
.
Thanks in advance for any help you may be able to give with this problem
If I understood correctly, you're trying to make an app that stores the data of each submitting of the forum and returns them to all users that come across the page?
For such tasks you'll need, at least:
A web server that runs PHP, Python or other language to your liking*;
A database to connect the server-side with (MySQL or PostgreSQL usually);
What you need to do:
Learn about HTTP POST and basic SQL input/output if you haven't;
Learn AJAX if you haven't;
Store the user input in the database and have a server script retrieve it on call;
Update the dynamic page bit (the unordered list) with AJAX (loading a XML file with the PHP script that writes the database info into it should do) every minute or so using a timeout function.
I'll post links to all I've mentioned in a minute.
*NodeJS is getting popular for being asynchronous (making it easier for dynamic pages to interact with the server) and allowing programmers to use the same language client- and server-side, but I have never tried it to tell you how it fares. Edit: says John NaN: NodeJS is not recommended. Again, I don't know it myself; that is why it's on a note and not upper in the post. Good luck!
*Bonus note: don't trust W3Schools most of the time. The AJAX tutorial I linked to, however, isn't that bad and it's easy to follow.