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Node.js makes it possible for you to run JavaScript programs outside of a web browser or on a server. To run a Node.js application on MacOS, follow these three steps.
- Open Terminal by pressing Command+Space to open Spotlight Search and entering
terminal
into the search box. - Enter the following command, then press Return to create a file named test-node.js containing a simple application that will print out the result 1 + 1.
- Type
node
followed by the name of the application, which is test-node.js in this case, and then press Return. The result of running the application will be printed out to the terminal.
I recently picked up a Yubico U2F hardware key and thought I’d try to create a web application that was protected with two-factor hardware-based authentication. Things were going smooth until I realized that it is mandatory to be using HTTPS within your application, even when testing locally. HTTPS is common, but I’d never actually set it up with Node.js because I had always been using services like Cloudflare that configure it for you. The problem is that these services are for live domain names, not necessarily localhost.
While we’re not going to explore U2F hardware keys in this tutorial, we’re going to take a look at creating and installing a self-signed certificate for use in Node.js within macOS.
Aug 30, 2010 Node.js is gaining a lot of speed and is an exciting new development framework. Here's a quick overview of how to get Node.js working on OSX along with npm, the package manager for node.
Creating a Self-Signed Certificate
Before we tell Node.js that we want to use a self-signed certificate for testing on localhost, we need to actually generate that certificate. If you’re on a Mac and you’ve already got your development tools installed like Xcode, you should already have the necessary command line tools to be successful.
From the command line, execute the following:
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- Jan 25, 2017 Node.js always ships with a specific version of npm - Node.js doesn't (and shouldn't!) automatically update npm. The npm releases aren't synced with Node.js releases. Because of this, there's almost always a newer version of npm than the one that is installed by default with a.
- Node.js is a free and open source server-side JavaScript environment that uses an asynchronous event-driven model. Moreover, Node.js is a platform built on Chrome's JavaScript runtime for easily.
The above commands will do two different things. The first command will generate a private key to be used when creating your certificate in the second command. In the second command, we generate a certificate that expires after a a year. The above commands are not specific towards generating a localhost certificate, but they are for a self-signed certificate. To make the certificate localhost compatible, it is important that you use localhost as the common name when prompted by the second command.
Don’t lose the .key file and the .cert file as both will be necessary when configuring the Node.js application.
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Installing the Certificate in the macOS Keychain
With the .cert file in hand, the next step is to install it as a trusted authority on macOS. To do this, you’ll need to open your Keychain application.
In the certificates tab, drag your .cert file into the window. You may be prompted to enter your computer password and if not, you will be prompted later.
With the certificate added, we need to change the trust so that way it is actually used by our web browsers. Double click on the certificate entry to be brought to a new window with the certificate information.
Because this certificate is self-signed for localhost testing, it is easiest to choose the dropdown and select to always trust what the certificate has to offer. If you are more comfortable choosing only what you need, go for it. When you close the window after making the change, you may be prompted to enter your password.
With the certificate generated and in place on macOS, we can work towards using it in Node.js.
Developing an HTTPS Secured API with Express Framework
We’re going to build an incredibly simple RESTful API with Express Framework that uses our self-signed certificate. If you’d like more information on creating APIs, you might check out my previous tutorial titled, Create a Simple RESTful API with Node.js, or even my in-depth eBook and video course, Web Services for the JavaScript Developer.
On your computer, create a new project directory and execute the following commands:
The above commands will create a new Node.js project and install the Express Framework package. What you’ll also need to do is create an app.js file or some other JavaScript file to hold our application logic. Within the app.js file, include the following:
If you’ve ever worked with an Express Framework API before, the above code should look very familiar. At the top you’ll notice that we’ve imported the
https
and fs
dependencies, both of which are readily available out of the box in Node.js. We have a single endpoint, which will be served over HTTPS.So it seemed to back it up–but not all files as Time Machine is supposed to. As soon as I plugged it in, it asked it I wanted Time Machine to use it for back-up. Can I just delete the SmartWare and use it as intended? Wd smartware for mac. My My Book Studio is intended as full backup for new laptop.
To make our application HTTPS, we need to use the
https
package and read the .key and .cert files from the disk. You’ll want to provide the path to your files because the above code assumes that both files exist in the same directory as the app.js file. Finally it might be a good idea to use the typical HTTPS port which is 443.Oct 22, 2012 The command you'll find usedul is command-F. (Command may also show the 'apple' key on your keyboard, so the one next to spacebar). You may also find this document useful - it has all Mac OS X keyboard shortcuts in it. How to Use Find and Replace in Word 2008 for Mac 1 Choose Edit→Find. 2 Type the word you want to replace in the Find What field. 3 Click the Find All button and then close the Find and Replace dialog. 4 Choose Format→Font and choose the formatting you want from the Font Style list. https://pgblwbr.weebly.com/blog/how-to-search-on-mac-for-words. How to Find Text Within a Page in OS X. Press Command+F to bring up the in-page search box. Alternatively, you can go to the Edit menu Find Find to bring up the search box. Type in your search word or phrase and hit Enter. Safari will highlight all of the instances of the word on the page. How to Search a PDF on Mac with Preview? Open PDF with Preview. Go to FileEditFind. Or you can use search toolbar in the window, even press 'Command+F' to search a pdf on mac. Input the key word you want to search in the field and the word will be highlighted in yellow as following.
Inbound filtering. Expanded PF Config. Inbound logging. It is a full featured app and is a good starting point for the novice user. https://pgblwbr.weebly.com/firewalls-for-mac.html.
When you run this application and navigate to https://localhost/ in your web browser, Chrome or similar might throw an alert about the destination being unsafe. This is because we’re using a self-signed certificate and Chrome or similar might not recognize it as a safe authority. Buy windows 10 for mac. Go ahead and choose to proceed anyways because we know what we’re trying to accomplish.
Conclusion
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You just saw how to generate, install, and use a self-signed certificate in your Node.js application running on localhost on a macOS computer. The process of installing a self-signed certificate may vary between Mac, Linux, and Windows, but the generation and usage in Node.js should be more or less the same.
If you want to expand what this tutorial has to offer when it comes to building web services, check out my eBook and video course titled, Web Services for the JavaScript Developer.
A video version of this tutorial can be found below.
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Nic Raboy
Node Js Library For Machine Learning
Nic Raboy is an advocate of modern web and mobile development technologies. He has experience in Java, JavaScript, Golang and a variety of frameworks such as Angular, NativeScript, and Apache Cordova. Nic writes about his development experiences related to making web and mobile development easier to understand.
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