An API that reads the request body for a specified number of bytes?

[marunguy]

Is there an API that reads a specified number of bytes from the request body?

https://docs.python.org/3/library/io.html#io.Reader
https://docs.aiohttp.org/en/stable/streams.html#aiohttp.StreamReader.read

This is needed to save portions of the body to multiple files while parsing a large request body.

While it's possible to save the entire request body to a file and then parse the saved file, this functionality is desired to reduce disk I/O.

Multipart is also a possible method, but unfortunately, we are currently unable to change the agent.

[marcelomarkus]

If you have the flexibility to define how data is packaged at the source, take a look at b-fast.
https://github.com/marcelomarkus/b-fast
B-FAST is a very high-performance binary serialization protocol for critical routes where latency, CPU usage, and bandwidth represent bottlenecks.