Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to download a file with Node. Ask Question. Asked 9 years, 3 months ago. Active 2 months ago. Viewed k times. How do I download a file with Node. Joseph is making an incorrect assertion that all node processes are server processes — lededje.
It is prefectly doable. Add a comment. Active Oldest Votes. Michelle Tilley Michelle Tilley k 39 39 gold badges silver badges bronze badges. I got the following console output when I ran this script: node. Does this code close the file properly when the script ends or would it lose data? This depends upon the req url type if you are requesting https you must use https otherwise it will throw error.
EthanKeiley why do you say that it isn't closed properly? By default createWriteStream will set autoClose to true and readable.
Show 14 more comments. Don't forget to handle errors! The following code is based on Augusto Roman's answer. But we don't check the result if cb cb err. Vince Yuan Vince Yuan VinceYuan the callback is confusing me. What would I place as the cb argument? Abdul Sounds like you are very new to node. Take a look at this tutorial: tutorialspoint. Abdul maybe it would be good if you share with the rest of the class what you have figured out? Is there a way to see the speed of the download? Show 7 more comments.
Kelvin Omereshone 2 2 silver badges 11 11 bronze badges. Abdul You specify the callback with a function only if you need to do something when the file has been successfully fetched. It would be good to check the status code before saving: response. But we don't check the result return cb err. Buzut Buzut 4, 4 4 gold badges 41 41 silver badges 50 50 bronze badges. The request module just works straight for HTTPs. S Ventura. It's more error prone without a doubt. Anyway, in any case where using request module is an option, I'd advise it as it's way higher level and thus, easier and efficient.
Alex, nope, this is an error message and there's a return. We are using spawn instead of exec for the sake of convenience - spawn returns a stream with data event and doesn't have buffer size issue unlike exec. That doesn't mean exec is inferior to spawn ; in fact we will use exec to download files using wget. The way data was written to the instance of fs. The only difference is that the data and end events are listened on the stdout object of spawn.
Also we listen to spawn 's exit event to make note of any errors. Although it says downloading using wget , this example applies to downloading using curl with the -O option too. This method of downloading looks the most simple from coding point of view. Why exec and not spawn? Because we just want wget to tell us if the work was done properly or not, we are not interested in buffers and streams.
Drop your email in the box below and I'll send new stuff straight into your inbox! Nathan Sebhastian is a software engineer with a passion for writing tech tutorials. Learn JavaScript and other web development technology concepts through easy-to-understand explanations written in plain English. How to download a file using NodeJS without any extra package Download a file to your filesystem using NodeJS without any extra package Posted on June 26, You can download a file an image, a text, or any kind of file and save it to your filesystem using NodeJS built-in https and fs module.
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