Nodejs http request install#
Nodejs http request full#
Nodejs http request code#

Nodejs http request code#

If everything went as expected, and the status code indicated success, the program will proceed as before. You can also throw a custom error instead.Īgain, you should have a strategy in place for handling errors like this instead of just printing to the console. We used the function at the beginning of the promise-chain (before parsing the response body) in order to see whether we encountered an issue. First, we need to create a todo object, and later convert it to JSON when adding it to the body field: let todo = )`) Let's add a new item to that list for the user whose id equals 123. We'll demonstrate how this works by adding a new item to JSONPlaceholder's todos.

Nodejs http request full#

These fields have straight-forward meanings: method sets what type of HTTP request we're using ( POST in our case), body contains the body/data of our request, and headers contains all the necessary headers, which in our case is just the Content-Type so there isn't any confusion when parsing our request.įor a full list of options, you can visit the documentation. There are many possible options we can set using this parameter, but the only ones we'll use in this article are method, body and headers. Without this optional parameter, our request is a GET request, by default. As we mentioned earlier, the fetch() function allows for an additional parameter to be added to make POST requests to a web server. We can also use the fetch() function to post data instead of retrieving it. We also could have printed the entire JSON returned by res.json(). Running this program would give us: First element in the array:ĬatchPhrase: 'Multi-layered client-server neural-net',

json() function, and this allowed us to easily access individual elements and their fields. The body of the HTTP response contains JSON-formatted data, namely an array containing information about users. As before, the fetch() function takes in the URL of the server and awaits a response.Ĭonsole.log( 'First user in the array:') Ĭonsole.log( 'Name of the first user in the array:') We will retrieve fake user data from the JSONPlaceholder REST API. We'll get the entire HTML markup of the Google home page logged to the console: Fetching JSON Data From REST APIĪnother common use case for the node-fetch module is getting data using the REST API. If we run the code above from the console: $ node index.js

Here we're waiting for the result of the previous conversion and printing it to the console. In this line, we're waiting to receive the response from the Google web server and converting it to text format. then() functions to help us manage the response and data from our request. Because node-fetch is promise-based, we're chaining a couple of. The only parameter we've added to the fetch() function is the URL of the server we're making an HTTP request to. In the code above, we're loading the node-fetch module and then fetching the Google home page. Let's make a simple GET request to Google's home page: fetch( '')

Nodejs http request install#

Next, install node-fetch as shown above and add an index.js file. This will create a package.json file in the directory. The node-fetch package allows you to do all of that.Ĭreate a directory for your project, cd into the directory and initialize a Node project with default settings: $ npm init -y You might want to retrieve text from the web server, a whole web page, or data from using REST API. There are two common use cases of fetching data from a web server.

headers - an object containing response headers, a specific header can be accessed using the get() function.

ok - equals true if status is a 2xx status code (a successful request).

status and statusText - contain information about the HTTP status code.

json() - parses the response body into a JSON object, and throws an error if the body can't be parsed.

text() - returns the response body as a string.

The function returns a Response object that contains useful functions and information about the HTTP response, such as: The optional options parameter is used when we want to use fetch() for anything other than a simple GET request, but we will talk about that more in-depth later. It has to be an absolute URL or the function will throw an error. The url parameter is simply the direct URL to the resource we wish to fetch. To install a specific version of the module, you can use npm: $ npm install Īs previously mentioned, the fetch() function in the node-fetch module behaves very similarly to the native window.fetch() function. Note: The API between node-fetch 3.0 and 2.0 is the same, just the import differs.