Enabling TCP keepalive

[yoshi-taka]

Describe the feature

Node.js and Python SDKs allow you to configure TCP keepalive.
It would be great if the Rust SDK also offered an easy way to set it.

Use Case

https://docs.aws.amazon.com/lambda/latest/dg/best-practices.html

Proposed Solution

The default-client uses Hyper, so it’s possible to configure TCP keepalive there.
Legacy 0.14 is also supported.

https://github.com/hyperium/hyper/blob/d77c2599bc023b258b90a17f5b633c8b7b0cbd4b/src/client/conn/http2.rs#L345

https://github.com/hyperium/hyper/blob/72ebcffb7d82cda15aa74507b2cc522ca2a7a94d/tests/client.rs#L3059

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

A note for the community

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