4dc2b4a164
We have reports of runtime panics (linkerd/linkerd2#7748) that sound a lot like rust-lang/rust#86470. We don't have any evidence that these panics originate in h2, but there is one use of `Instant::sub` that could panic in this way. Even though this is almost definitely a bug in Rust, it seems most prudent to actively avoid the uses of `Instant` that are prone to this bug. These fixes should ultimately be made in the standard library, but this change lets us avoid this problem while we wait for those fixes. This change replaces uses of `Instant::elapsed` and `Instant::sub` with calls to `Instant::saturating_duration_since` to prevent this class of panic. See also hyperium/hyper#2746
H2
A Tokio aware, HTTP/2.0 client & server implementation for Rust.
More information about this crate can be found in the crate documentation.
Features
- Client and server HTTP/2.0 implementation.
- Implements the full HTTP/2.0 specification.
- Passes h2spec.
- Focus on performance and correctness.
- Built on Tokio.
Non goals
This crate is intended to only be an implementation of the HTTP/2.0 specification. It does not handle:
- Managing TCP connections
- HTTP 1.0 upgrade
- TLS
- Any feature not described by the HTTP/2.0 specification.
This crate is now used by hyper, which will provide all of these features.
Usage
To use h2, first add this to your Cargo.toml:
[dependencies]
h2 = "0.3"
Next, add this to your crate:
extern crate h2;
use h2::server::Connection;
fn main() {
// ...
}
FAQ
How does h2 compare to solicit or rust-http2?
The h2 library has implemented more of the details of the HTTP/2.0 specification than any other Rust library. It also passes the h2spec set of tests. The h2 library is rapidly approaching "production ready" quality.
Besides the above, Solicit is built on blocking I/O and does not appear to be actively maintained.
Is this an embedded Java SQL database engine?
No.