Cap'n Proto

Insanely fast data interchange format and capability-based RPC system. Think JSON, except binary. Or think Protocol Buffers, except infinitely faster.

[Cap'n Proto @CapnProto]

Cap'n Proto 1.0 has been released!

But, uh, well, it's not as exciting as it sounds. See the blog post for the full story.

https://t.co/ZEg4L2hZEt

[David Renshaw @dwrensha]

I implemented reflection in capnproto-rust and wrote a blog post about using it to draw weird abstract pictures: https://t.co/UnCiGKBXgv

[Cap'n Proto @CapnProto]

Hello! We have a security advisory today. :( CVE-2022-46149 could lead to out-of-bounds memory read under certain scenarios. At present we have not observed any applications that are actually vulnerable, but if you use Cap'n Proto, please patch anyway. https://t.co/p6YLoHtlC7

[Cap'n Proto @CapnProto]

Cap'n Proto 0.9.0 has been released. There's no specific huge new feature, just 16 months of incremental improvements and bug fixes. https://t.co/hHZB6MrtSi

[Cap'n Proto @CapnProto]

Cap'n Proto 0.8: Streaming flow control, HTTP-over-RPC, fibers, etc. https://t.co/OEnXHZEN6s

[Kenton Varda @KentonVarda]

Yesterday I added FD passing to Cap'n Proto RPC. Now you'll be able to embed file descriptors in RPC messages and, as long as the transport is a Unix socket, the receiving process will get direct access to the file descriptor. https://t.co/KRyvIjbkvO

[Cap'n Proto @CapnProto]

@zackbloom @superpatell @Cloudflare It's true, @zackbloom sits next to a protocol. The @Cloudflare office is a funny place.

[Cap'n Proto @CapnProto]

Cap'n Proto 0.7 has been released. Most of what's new is improvements to the underlying KJ C++ toolkit library and HTTP implementation, which are used heavily in the implementation of @Cloudflare Workers. Also some improvements to the JSON converter. https://t.co/VIlw6USKmH

[Cap'n Proto @CapnProto]

@JestinMa Some day, we'd like to define a UDP transport with fancy things like loose message ordering, real-time streaming, encryption, and 0RT introductions. I don't know when that will happen, though.

[Cap'n Proto @CapnProto]

@JestinMa The transport layer is abstracted, so you could potentially implement a UDP transport under capnp RPC. However, you would not get much advantage vs. TCP currently because the RPC layer cannot handle out-of-order or missing messages.

[No longer using this site @talex5]

@OpenMirage @CapnProto RPC release 0.2 - adding persistence, encryption and access control: https://t.co/Gc8HCRuBUn #ocaml

[No longer using this site @talex5]

Pure #OCaml @CapnProto RPC now available! https://t.co/76LlkBqFMM

[Cap'n Proto @CapnProto]

@brokencodebot Incorrect.

[Cap'n Proto @CapnProto]

@fanf Actually, yes. The name originated with a cap-based RPC lib on top of protobuf, but then I decided to redo the serialization layer too. :)

[Cap'n Proto @CapnProto]

Cap'n Proto 0.6 Released! Now with full Windows support and two and half years of other improvements. https://t.co/uoEcp2lurL

[Cap'n Proto @CapnProto]

May 18, 6PM: Cap'n Proto 0.6 Release Party at @Cloudflare. RSVP: https://t.co/DpNYxbel5R

[Cap'n Proto @CapnProto]

Cap'n Proto security advisory for 32-bit builds with Apple compiler... https://t.co/JlXcVXj18B

[David Renshaw @dwrensha]

cargo-fuzz is dead simple to set up and very effective at finding bugs.

Here's what it found in capnproto-rust:

https://t.co/L1I8fjjQVs

[Cap'n Proto @CapnProto]

@BesseIFunction In fact, capnproto-java's unit tests are written in Scala. cc @dwrensha

[Cap'n Proto @CapnProto]

@BesseIFunction There isn't a Scala-native implementation yet, but capnproto-java works well with Scala.