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Add a JSON-RPC stats endpoint for websites

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Plain HTTP + JSON-RPC 2.0 (axum, already in the tree) so a site backend
can pull stats without gRPC stubs. Methods: stats.get (counters + gauges)
and stats.channel { channel } (lines + top talkers). Optional [jsonrpc]
config, off unless set.

Security: bearer-token authenticated with a constant-time compare, refuses
to start with an empty token, read-only (only stats.* methods — no way to
mutate state), method-allowlisted, a 64 KiB body limit, and meant to bind
to localhost beside the backend.
This commit is contained in:
Jean Chevronnet 2026-07-13 20:21:41 +00:00
parent 04f927d3db
commit 07eb9939d7
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6 changed files with 219 additions and 0 deletions
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Cargo.lock generated
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@ -110,6 +110,8 @@ dependencies = [
"http",
"http-body",
"http-body-util",
"hyper",
"hyper-util",
"itoa",
"matchit",
"memchr",
@ -118,10 +120,15 @@ dependencies = [
"pin-project-lite",
"rustversion",
"serde",
"serde_json",
"serde_path_to_error",
"serde_urlencoded",
"sync_wrapper",
"tokio",
"tower 0.5.3",
"tower-layer",
"tower-service",
"tracing",
]
[[package]]
@ -142,6 +149,7 @@ dependencies = [
"sync_wrapper",
"tower-layer",
"tower-service",
"tracing",
]
[[package]]
@ -283,6 +291,7 @@ version = "0.0.1"
dependencies = [
"anyhow",
"argon2",
"axum",
"base64",
"fedserv-api",
"fedserv-botserv",
@ -382,6 +391,15 @@ version = "1.0.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
[[package]]
name = "form_urlencoded"
version = "1.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cb4cb245038516f5f85277875cdaa4f7d2c9a0fa0468de06ed190163b1581fcf"
dependencies = [
"percent-encoding",
]
[[package]]
name = "fs_extra"
version = "1.3.0"
@ -1035,6 +1053,12 @@ version = "1.0.23"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cf54715a573b99ac80df0bc206da022bcd442c974952c7b9720069370852e21f"
[[package]]
name = "ryu"
version = "1.0.23"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9774ba4a74de5f7b1c1451ed6cd5285a32eddb5cccb8cc655a4e50009e06477f"
[[package]]
name = "serde"
version = "1.0.228"
@ -1078,6 +1102,17 @@ dependencies = [
"zmij",
]
[[package]]
name = "serde_path_to_error"
version = "0.1.20"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "10a9ff822e371bb5403e391ecd83e182e0e77ba7f6fe0160b795797109d1b457"
dependencies = [
"itoa",
"serde",
"serde_core",
]
[[package]]
name = "serde_spanned"
version = "0.6.9"
@ -1087,6 +1122,18 @@ dependencies = [
"serde",
]
[[package]]
name = "serde_urlencoded"
version = "0.7.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
dependencies = [
"form_urlencoded",
"itoa",
"ryu",
"serde",
]
[[package]]
name = "sha2"
version = "0.10.9"
@ -1378,8 +1425,10 @@ dependencies = [
"futures-util",
"pin-project-lite",
"sync_wrapper",
"tokio",
"tower-layer",
"tower-service",
"tracing",
]
[[package]]
@ -1400,6 +1449,7 @@ version = "0.1.44"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "63e71662fa4b2a2c3a26f570f037eb95bb1f85397f3cd8076caed2f026a6d100"
dependencies = [
"log",
"pin-project-lite",
"tracing-attributes",
"tracing-core",