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I am going to write an application server(RESTFull API) to allow clients to download a zip file, but requirement is the download must be resume-able (due to failure / Network disconnection).
Is there any special protocol made for this???
If yes please share some contents on this, I am not even able to find anything on google. I am trying to do this in Java(jersey). Thanks
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Resumable downloads were introduced in Nuke 7. When the image download fails or gets canceled and the image is only partially loaded, the next request will resume where the previous one left off. This sounds like a must-have feature, but most image loading frameworks don't support it.
tus is a new open protocol for resumable uploads built on HTTP. It offers simple, cheap and reusable stacks for clients and servers. It supports any language, any platform and any network.
1) When you get pop-up that the file can't be resume, don't delete or change anything about the file. 2) Copy the referrer URL from file properties (you can open properties of any file in IDM by clicking left mouse button 2 times) and search it on your browser.
This is a process known as 'Chunked Encoding'. A browser requests individual parts of a file, downloads them independently, and assembles them in the correct order once all parts have been downloaded: In chunked transfer encoding, the data stream is divided into a series of non-overlapping "chunks".
There's no special protocol you need to know about for resumable downloads. HTTP defines the "Range" header. Clients use the Range header to specify which parts of a file they want to download.
Resumable downloads are implemented by keeping track of which parts of the file you have downloaded, and if interrupted, resuming where you left off.
Server-side, you usually only need to care about whether the asset being served is dynamic or static.
If it's static, the solution is usually as simple as making sure that your web server (Apache or whatever) has the Range header turned on and letting clients have at it.
If it's dynamic, you have to check for the presence of a Range header in the incoming HTTP request and then ensuring that you only serve the requested portion of the asset. There are some additional things to consider such as versioning, caching, etc. which I won't go into but hopefully you get the idea.
Hope that helps!
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