Only create the fs. This reduces the amount of fs. Even on a OK we can still possibly reject due to an EEXIST file already exists imagine another process created the file whilst we were doing network calls. Recursively call download if you get a Moved Permanently or Found Moved Temporarily redirect following the link location provided in the header. The issue with some of the other answers recursively calling download was that they called resolve download instead of download This way the nested chain of promises resolve in the correct order.
It might seem cool to clean up the temp file asynchronously, but I chose to reject only after that completed too so I know that everything start to finish is done when this promise resolves or rejects. Josh Peak Josh Peak 4, 4 4 gold badges 33 33 silver badges 48 48 bronze badges. You shouldn't waste resources doing the download if the destination file already exists.
Do the check first if possible. Phil Really good point. I have updated the example with an earlier guard check before falling into the recursive networking calls but left the success file handling code the same.
This short circuit guard statement should save some time in this case now. Vince Yuan's code is great but it seems to be something wrong. But we don't check the result if callback callback err. Feel Physics Feel Physics 2, 4 4 gold badges 23 23 silver badges 36 36 bronze badges. I prefer request because you can use both http and https with it. Looks like Request has been deprecated github. No new changes are expected to land. In fact, none have landed for some time.
Wai Ha Lee 7, 61 61 gold badges 56 56 silver badges 85 85 bronze badges. Idan Dagan Idan Dagan 7, 3 3 gold badges 28 28 silver badges 38 38 bronze badges. Roman Podlinov Roman Podlinov Very clean, thank you. What do the flags 'wx' do when you're creating the writeStream? It is returning garbage character if file name is other than ascii like if filename is in japanese.
Do you think ajax-request is not a third party library? Download using promise, which resolve a readable stream. The questions was specific to not include third party modes : — David Gatti. If you are using express use res. A 13k 4 4 gold badges 90 90 silver badges bronze badges.
Using the http2 Module I saw answers using the http , https , and request modules. I'd like to add one using yet another native NodeJS module that supports either the http or https protocol: Solution I've referenced the official NodeJS API, as well as some of the other answers on this question for something I'm doing. Rik Rik 3 3 silver badges 8 8 bronze badges. Is this backward compatible? Works everywhere or only for http2? Neil I'm assuming you are asking if http2 is backward compatible with http1.
Because http2 improves framing; adding binary compression, the ability to push from server to client, and simultaneous connections - it is absolutely required that both server and client know the implementation this allows abstraction of implementation from the application too. Good news is that all major browsers have supported http2 since about - and Node as a client does too.
Node, Nginx, and Apache offer it server side - so most use cases are covered. Its a vast improvement. Thanks for the reply Rik — Neil. Without library it could be buggy just to point out. For more info you can visit this. In this article we learned how to download the files in node. There the most efficient way is by using the stream and by using the request. While this two are most used ways for download the file furthermore in some case you can use download by any third party modules.
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It is mandatory to procure user consent prior to running these cookies on your website. Leave a Reply Cancel reply Your email address will not be published. Kotlin Split String example. Follow us Facebook Youtube Github. Tools Json Formatter. We use cookies to improve your experience with the site. To recognize error situations, listen for the error event as well. The readable stream might signal the error event in situations like the underlying data flow interrupted.
Handle this scenario as well. Axios has great support for file downloads. Adjust the file download with Axios to your needs. We love to hear your thoughts and ideas.
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