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Closed 7 years ago.
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I have implemented real time chat using Socket.io with Node.JS
Everything works perfectly, except it did not work on my computer. I narrowed the problem down to the fact my router was by default blocking the outbound port (9239)
The problem is, I cant diagnose random users of my webpage's firewall issue. So I need to know what port I should bind node.js to so that everybody can use it.
I could create its own url and bind it to 80 or 443, but I have read that may be bad practice?
There are many ways to do this. One way is have a web server (like Apache or nginx) field the HTTP(80) or HTTPS(443) traffic, serve static images, and pass certain requests onto node.js. On unix, binding to a port below port 1024 requires root access.
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Closed 4 months ago.
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I use VPN browser extensions and therefore there is a different proxy on my browser than the whole system.
I want to see what exactly is the proxy information (port and address) used in my browser. How can I do this?
The browser I use is Edge and Chrome, and my operating system is Windows
You can log your network activity and find out your proxy setting within the json file. Just go to:
For Edge: edge://net-export/
For Chrome: chrome://net-export/
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Closed 1 year ago.
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I'm making a RSS reader in flutter, however my requests to the feed are blocked by Cloudflare.
I've been looking for a way to emulate a browser with javascript enabled, since it is needed to pass the Cloudflare test, but nothing seems to have that functionality.
What I need is a simulated browser, that renders the page requested, execute the javascript contained in the page. I haven't found anything that claims to do that aside from webview_flutter, which is a widget and thus cannot be used I my case.
I find it weird that there is no such thing as a simulated browser for Flutter, so I must have missed something.
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Closed 6 years ago.
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How do Slack and Hipchat handle chat on the server side and client side? What languages do they use?
Whenever I'm curious about the technologies used by certain companies I usually check their job postings.
Slack Application engineer job posting:
Our main tools that we use to build Slack are PHP, MySQL, and Linux
Hipchat is a little more vague. They state throughout several job postings that they use PHP, Python, Redis, MySQL, ElasticSearch, and CouchDB. According to a blog post they use PHP for dynamic web pages, and python to implement a XMPP protocol for chat using Twisted.
So at the core it seems like they rely on a PHP/MySQL stack with some addition of other technologies.
I like to check stackshare.io
http://stackshare.io/slack/slack
not a perfect answer to your question but a nice starting point
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Closed 7 years ago.
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I am running a node.js application on the server and it runs fine on the localhost but I cannot access it remotely from other systems outside of my LAN.
This is mainly because there is a router between my server (Windows Server 2003) and the Internet which does not allow Port 3000 to be open.
So I want to listen on port 80 but if the request is for a specific URL, I want to redirect it to port 3000.
How do I do this? Any help would be appreciated.
You need to setup your Webserver (IIS) to listen for external connections on Port 80 and (proxy) forward this to the Node Server at Port 3000. Windows 2003 is EOL (end of software lifecylce), so keep that in mind. For more mature IT infrastructure like Linux and nginx, DigitalOcean wrote this great tutorial, you can run nginx on Windows.
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Closed 8 years ago.
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While browsing I came across this link
As you can see image is protected, if you browse cars-database.com you take source image and you will get the same message.
This is first time I see this and I wonder how this has been implemented? Does anybody know?
Screenshot of protected source image:
Here's a simple example on how to implement something similar in nginx:
location ~ \.(jpe?g|png|gif)$ {
valid_referers none blocked mysite.com *.mysite.com;
if ($invalid_referer) {
rewrite ^ http://mysite.com/lowres$request_uri permanent;
}
}
They likely simply have two versions of the image stored on the server, the "real" one and one with the extra message added via a Photoshop template or something. They then employ a check for the Referer header like:
if request for image and referer is not cars-database.com/*
then serve "watermarks/$requestedImage$"
This can be implemented trivially with an Apache mod_rewrite rule, any other web server's rule system or any server-side programming language like PHP, Python or whatnot.