How to receive 'Content-Length' from download/view methods of Storage

I want to implement file download with 'Range' header and can't receive necessary headers in response. Here is a part where them should be defined but in 1.3 version I don't receive 'Content-Length' - https://github.com/appwrite/appwrite/blob/af7cbef0245a33fc83eb0587d11355fc34395ac9/app/controllers/api/storage.php#L1033-L1037

TL;DR

The user is trying to receive the 'Content-Length' header when downloading or viewing files from a storage system. They mention that their framework chunks responses and does not return the 'Content-Length' header in those cases. They are looking for a way to calculate the progress of the download without the 'Content-Length' header. Solution: One suggestion is to parse the 'Content-Range' header instead, as it may contain the full length of the file. Another user recommends checking the response headers for the presence of the 'content-range' header, which should have the format "content-range: bytes 0-1/<CONTENT-LENGTH>".

My request looks like [GET]: https://myhost.com/v1/storage/buckets/bucket_id/files/file_id/download headers: x-appwrite-project: project_id Range: bytes=0-1

what's the response headers for that?

the header should have a content-range:

TypeScript

content-range: bytes 0-1/<CONTENT-LENGTH>

also, if you do get file, that should have the sizeOriginal

I didn't record exact set of headers. But I saw content-range. Is it always full length? BTW, it would be really useful if any type of download could return that content-size. At least we can calculate estimate of the download using that.

Sorry what do you mean?

As far as I know, when I download any file using URLSessionDelegate I receive progress of download in delegate, but if a server doesn't send Content-Length header with full length the progress will be always 0

interesting...do you know the details about what it actually does and how?

Our framework chunks responses bigger than a certain amount and doesn't return the content-length header when it does that. However, this is expected from an HTTP perspective

https://developer.apple.com/documentation/foundation/nsurlsessiondownloaddelegate/1409408-urlsession

totalBytesExpectedToWrite The expected length of the file, as provided by the Content-Length header. If this header was not provided, the value is NSURLSessionTransferSizeUnknown.