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HTTP/2 103 Early Hints Support #3991

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HTTP/2 103 Early Hints Support #3991

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4e2483a
prototype support for 1xx informational responses
dicej Dec 17, 2024
6810b2b
feat(http2): implement 103 Early Hints support
Dec 9, 2025
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11 changes: 10 additions & 1 deletion Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,10 @@ tokio = { version = "1", features = [
] }
tokio-test = "0.4"
tokio-util = "0.7.10"
# Additional dependencies for HTTP/2 Early Hints example
rcgen = "0.12"
tokio-rustls = "0.25"
rustls-pemfile = "2.0"

[features]
# Nothing by default
Expand All @@ -85,7 +89,7 @@ http2 = ["dep:futures-channel", "dep:futures-core", "dep:h2"]

# Client/Server
client = ["dep:want", "dep:pin-project-lite", "dep:smallvec"]
server = ["dep:httpdate", "dep:pin-project-lite", "dep:smallvec"]
server = ["dep:httpdate", "dep:pin-project-lite", "dep:smallvec", "dep:futures-util"]

# C-API support (currently unstable (no semver))
ffi = ["dep:http-body-util", "dep:futures-util"]
Expand Down Expand Up @@ -202,6 +206,11 @@ name = "web_api"
path = "examples/web_api.rs"
required-features = ["full"]

[[example]]
name = "http2_early_hints"
path = "examples/http2_early_hints.rs"
required-features = ["full"]


[[bench]]
name = "body"
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2 changes: 2 additions & 0 deletions examples/README.md
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Expand Up @@ -38,6 +38,8 @@ futures-util = { version = "0.3", default-features = false }

* [`echo`](echo.rs) - An echo server that copies POST request's content to the response content.

* [`http2_early_hints`](http2_early_hints.rs) - An HTTP/2 server that sends 103 Early Hints.

## Going Further

* [`gateway`](gateway.rs) - A server gateway (reverse proxy) that proxies to the `hello` service above.
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