Skip to main content

API's Study Notes: How To Make API Request With Node?


The course shows us we can make API's requests with Node.

The first thing we need to do is to create the "APIs" directory and touch "request.js" file inside that folder.

Then, we need to npm install request package in the APIs directory.

Once we have done those basic steps, we can start to require the "request" and make a request from a JavaScript file.

In the request, we need to have the "url", so the server knows where it should request the API. Next, we need to have a function.

request("url", function(error, response, body)

In the function, there are three things we pass in: error, response, and body.
  • Error: it will hold any potential error that we get such as internet disconnect, 404, and etc. It is important to check for an error.
  • Response: it will be the incoming message that we receive
  • Body: it is the actual response body that came back like HTML code

For example, in the "request.js" file, I make a fake URL in the request, and I write an if statement to check error.

If there is an error, it will print out the error. Else if the response status code is equal to 200, which means the request was received is fine to process, we can print out the body.

Since this URL is a fake one, the request won't be processed correctly. Therefore, the server print out the error message.


Now, I put my personal WordPress blog URL in the request, and run the server. Since my URL is correct, so the server can receive the response and process it. As a result, we can see it print out the Wordpress blog HTML code.

Labels:

Comments

Post a Comment

Popular posts from this blog

Intermediate Express.js: How To Add Styles & Partials in EJS File?

So far, we only have simple HTML tags and ejs tags in each ejs file. Every template page has no style at all. And the basic HTML header and footer are also missing. Today, I learned how to add styles and partials in ejs file. Link Style Step One: Touch a Separate CSS file I create a new directory "Style" under the "EJSDemo" directory, then I add a new CSS file "app.css" inside "Style" folder. Step Two: Add app.use(express.static()) in the app.js I add app.use(express.static("style")) in the "app.js". This will tell Express.js to serve the content of "Style" directory. Step Three: Write styles in CSS file I simple give body an orange background color and set text color to be grey. Step Four: Link to CSS file in the EJS file I just add <link> tag to link the "app.css" file on the top of the h1 tag in each ejs template. As the result, when I run the app and...
Post a Comment
Read more

Intro to Backend: Is Browser The Only Place To Send HTTP Request?

Today,  I begin to learn the second part of web develop course: backend. Frontend is the stuff that we can see and interactive with, such as HTML, CSS, and JS. We can type our code, style our page, or write some function to make interaction. However, backend is everything else. For example, we type Target web address in the Internet Browser. As we hit "enter", there are a few steps to go through: 1. The HTTP request is sent to a particular server's IP address. 2. The server figures out what to send us 3. It sends a HTTP response back to us Those process we are hard to see, and it happens in less than one second. The instructor said that the browser is not the only place to send the HTTP request, and there are so many choices out there. In this learning course, we are going to use Postman App . Postman allows us to make HTTP requests and viewer responses. It is really for developers to understand how things are working or debug something. In the P...
Post a Comment
Read more

Intermediate CSS: Three Steps To Create A Photo Gallery

I have seen many image blogs these years. People love to post their photos online to express life and feeling.  Image is powerful because it could bring a visual story to audience. People can see what you see, and may be feel the same way as you feel, too. If we want to build our own photo gallery, what should we do? Luckily, the boot-camp instructor just showed me how to use HTML and CSS to create a simple photo gallery.  I would love to share my study note here. (p.s. all the image links are provided by Udemy course instructor) Step One: Add Image Links on HTMLPage The instructor provides all the image links. All we need to do is add those links inside the <img> tag. Without CSS, the page will looks like this: they are not organized, and sizes are different, too. Step Two: Set Image Property Values We set the width of each photo the same value which is 30%, so there will be three images per line. The percentage value can help...
Post a Comment
Read more