CODEWITHSUNDEEP
node.jsstream
Rodrigo Pereira
Rodrigo Pereira

Reputation: 1914

How to find the content-length of a readable stream in nodejs?

I need to know the content-length of a readable stream. How can I do it?

I know about fs.stat but I am developing an API that knowing the content-length from a readable stream would be much simpler.

Upvotes: 4

Views: 6816

Answers (1)

Jonathan Ong
Jonathan Ong

Reputation: 20315

the idea behind the stream is that you start working on data before the source finishes. thus, you don't know the content-length.

if the underlying source is an HTTP object, then you could check stream.headers['content-length'], but even that is not ultimately reliable as the client or the server could have lied.

in short, you can't. personally, i'd rather just store it on disk temporarily.

Upvotes: 9

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