I have been developing a dashboard based on the Python Flask. I am in the verge of my work. After completing my work, I don't know how to host my flask application in the production server. To be clear, I want my user need not to run the flask application in command prompt, then type the URL in the browser to see the dashboard. I want users of the dashboard have to type the URL only in the browser to see the dashboard.
It's important for you to know the basics of flask. It's is a framework to serve web applications. So, you need to host a web application...
You can host it on your lan network or you can host it on a dedicated server on the web. You can use heroku(https://devcenter.heroku.com/articles/getting-started-with-python) to host your app for free (he free plan has a lot of limitations). Heroku has support for some RDMS like postgres. Note that heroku free plan is not supposed to be used as a production server!
I suppose that you've been using the embbed flask server(dev server) that is NOT production ready, for that you should be looking to use gunicorn or some wsgi server.
If you want to deploy to your client`s server you'll need a reverse proxy(NGINX,Apache2), a WSGI server(GUNICORN,uWSGI...), your app in it and some more. But if you do not know what you are doing, maybe you need to talk to a sysadmin, since you'll need to manager the server.
Check this guide of how to do it.
hope it helps!
Related
I am a building an Express JS Server where some (at least 1) route uses Selenium to perform specific actions on another website in a browser. For example, I have a route: mywebsite.com/api/login that route should open a Selenium instance on Google Chrome that logs in to a specific website (e.g. anotherwebsite.com).
What is the best way to achieve this and which method or service can provide such service for Free for development and/or cheap. As well as being cheap for production.
Thank you!
You can develop own your own machine for free. Either Express.js or Selenium is FOSS. To host for production you can find any Linux VPS provider that runs Node.js. DigitalOcean, Vultr or Linode would be the more affordable option.
I have developed an application using Angular, Node/Express and MySQL. I have deployed my Angular application on the tomcat server, which is connected to some 10 PCs. However, I want to deploy my backend i.e, Node.js/Express.js on the same server as well since my app is totally dependent on the backend. How can I do that? I read online that one cannot deploy node.js on tomcat as both are separate servers. Do I have to install Node.js/MySQL separately on the same server? Isn't there any security threat linked to hosting the front-end and the back-end on the same server machine?
I would really appreciate if someone could clear my mind regarding this.
It's true that Tomcat and nodejs are separate web server programs, and you cannot run one within the other. You can run them both on the same machine, but they must use different ports.
You can use a reverse proxy server (nginx) to project the illusion to your end users that your Tomcat and nodejs apps run on the same server and port. Explaining how to do that is far beyond the scope of a SO answer.
You can share a database server (MySql) between the Java applications running on Tomcat and the Javascript.
There is no inherent security risk in hosting your front-end and back-end code on the same origin server. In fact, there are security advantages, because you can set up restrictive CORS rules.
I've been developing a Next.js website locally and now want to set it up on my Apache server (with cPanel). However, I'm very new to Next.js and Node apps and not too sure how to go about it.
Has anyone done this successfully? Can you list the required steps and what files should be on the server?
Also, can this be done on a subdomain?
Thank you!
To start with some clear terms just so we're on the same page, there are two or three very different things people mean when they say "server":
A Server Machine is a computer that is connected to the internet that you intend to use to serve something to people on the internet.
A Server Program is some software you run on your Server Machine. The job of the Server Program is to actually calculate the responses to various requests.
A Server as a Service is a webapp provided by a company that stores your code and then puts it onto Server Machines with the right Server Program as needed.
While we're here, let's also define:
A Programming Language is the language your website is written in. Some sites have no language (and are just raw HTML/CSS files that are meant to be returned directly to the user). Many sites, though, have some code that should be run on the server and then the result of that code should be returned to the user.
In your case, you have a Machine whose condition we don't know other than that it is running the Program Apache (or probably "Apache HTTP Server"). Apache HTTP server is very old and proven and pretty good at serving raw files back to users. It can also run some Programming Languages like PHP and return the result.
However, Next.JS is built on top of the Programming Language Javascript, which Apache does not have the ability to run. Next.JS instead wants its Server Program to be Node.
So the problem here is basically that you have a hammer, but only screws. You can't use the tool you have, Apache, to solve the problem you need solved, running Node code and returning the result. To get around this you have two options:
First, you can find a way to access the Server Machine that is currently running Apache and tell it, instead, to run Node pointed at your Next.JS code whenever it starts up. This might not be possible, depending on who owns this machine and how they've set it up.
Second, and probably easier, is to abandon this Machine and instead use a Server as a Service. Heroku, AWS, and Netlify all support Next.JS and have a free tier. The easiest solution, though, is probably to just deploy it on Vercel, which is a Server as a Service run by the same team that makes Next.JS and which has a very generous free tier for you to get started with.
The good news, though, is that yes next.js does totally support being hosted from a subdomain.
Next.JS allows you to build fully functional Node Applications, as well as simple statically-generated sites like Jeckyl or Docpad. If your use case is a simple statically generated site look here: https://nextjs.org/docs/advanced-features/static-html-export
In particular the next build && next export command will create all the HTML and assets necessary to host a site directly via an HTTP server like Apache or Ngnix. Contents will be outputed to an out directory that could serve as the server root.
Pay very close attention to what features are not supported via this approach.
I have a question regarding the Node Red dashboard. I've got my dashboard all set up and working. Now, I want to be able to access the dashboard outside of my local network. Right now I do this through a VNC server. What needs to happen next is that clients need to able to access the dashboard, but they are not getting access to my VNC server of course. I have done my fair amount of Google work. I (somewhat) understand that a service like ngrok (ngrok.com) or dataplicity (dataplicity.com) is what I am looking for. What would be the best way of setting this up safely?
Might be useful to clarify: I'm using a raspberry Pi!
Thanks in advance!
If you want to give the outside world access to your dashboard, you can also consider to host your node-red application in the cloud. See links at the bottom-left of page https://nodered.org/docs/getting-started/
Most of those services have a free tier - so it might you cost nothing.
If you cannot deploy your complete node-red in the cloud (e.g. because it is reading local sensors) then you can split your node-red application into 2 node-red applications: one running locally and one (with the dashboard) running in the cloud. Of course then the 2 node-red applications need to exchange messages: for this the cloud services mentioned on that page also provides a secure way to send and receive events from the node-red cloud application that you can use.
Is it possible to build a node application with a web hosting service, such as blue host, godaddy or media temple? Or does it need to be on a hosting site such as Heroku or Back4App? If so where do I start to learn how to do this?
"Web hosting" is a pretty broad term, but typically you're going to see static HTML, and some hosted PHP, and a few other technologies. It's atypical to see Node.js application hosting as part of a general web hosting package. The reason is that you're going to want more control over the environment in which it runs.
That gives you a couple general classes of options:
Virtual or Dedicated Hosting
Having a VPS instance, or even a full machine if you can afford it, gives you full access to the OS and what you install on it. This means you can run whatever you want, including Node.js. You can get very cheap VPS hosting.
Node.js Application Hosting
This is the sort of service you get with Heroku or on AWS Elastic Beanstalk. Your application more directly integrates with the hosting provider, allowing you to take advantage of some of their automation and deployment tooling. If you need to do any automatic scaling, this is your best option.
You can try one of this five:
RedHat OpenShift
Nodejitsu
Microsoft Azure (don't!, well... try if you want to)
Modulus
Heroku (my fauvorite)
You can see details of each one here! But I would start with heroku app, but it's your choice
To get started with heroku
Godaddy does allow nodejs as part of its "web hosting" offering:
https://www.godaddy.com/pro/one-click-installation/node-js
That said, I really recommend Heroku and similar services for having less upsell and letting you work closer to cruft-free.