How does rails v6 fills REQUEST's content-length when a client doesn't send content-length in the headers?

Question

Long story short, I am using node-fetch to upload a file to a Rails server.
The file is from fs.createReadStream = ReadStream.

Note: when body is a Stream, Content-Length is not set automatically.

As it says in the readme, when it's a stream, the request's content-length will not be set by node-fetch.

When receiving the data with Rails v6, it somehow setups the request's content-length even though the client is not sending the length.
When receiving the same data with Rails v5, it doesn't setup the content-length.

I am trying to monkey-patch v5 with what they did in v6.
Does anyone know how v6 does that?

score 0 · Answer 1 · answered Oct 21 '21 at 05:58

0

answered Oct 21 '21 at 05:58

kukrt

1 Answers1