Add WASIp3 support

This adds wasi:{cli,clocks,filesystem,http,random,sockets}@0.3.0-rc-2025-08-15
support, including inbound and outbound HTTP requests.

I've smoke tested this manually with a few WASIp3 components and plan to port
over some or all of the existing WASIp2 tests.

TODO:
  - Port wasi:[email protected] tests
  - Add `Instrument::in_current_span` calls where necessary (e.g. in wasip3.rs)
  - Update to next release candidate once the `release-37.0.0` branch supports it
  - Switch to the final 37.0.0 release once it's available

Signed-off-by: Joel Dice <[email protected]>

Author: dicej

Cargo.lock

@@ -136,13 +136,15 @@ futures-util = "0.3"
 glob = "0.3"
 heck = "0.5"
 http = "1"
+http-body = "1"
 http-body-util = "0.1"
 hyper = { version = "1", features = ["full"] }
 hyper-util = { version = "0.1", features = ["tokio"] }
 indexmap = "2"
 itertools = "0.14"
 lazy_static = "1.5"
 path-absolutize = "3"
+pin-project-lite = "0.2.16"
 quote = "1"
 rand = "0.9"
 redis = "0.32.5"
@@ -175,9 +177,9 @@ wasm-metadata = "0.239.0"
 wasm-pkg-client = "0.11"
 wasm-pkg-common = "0.11"
 wasmparser = "0.239.0"
-wasmtime = { git = "https://github.com/bytecodealliance/wasmtime", branch = "release-37.0.0" }
-wasmtime-wasi = { git = "https://github.com/bytecodealliance/wasmtime", branch = "release-37.0.0" }
-wasmtime-wasi-http = { git = "https://github.com/bytecodealliance/wasmtime", branch = "release-37.0.0" }
+wasmtime = { git = "https://github.com/bytecodealliance/wasmtime", branch = "release-37.0.0", features = ["component-model-async"] }
+wasmtime-wasi = { git = "https://github.com/bytecodealliance/wasmtime", branch = "release-37.0.0", features = ["p3"] }
+wasmtime-wasi-http = { git = "https://github.com/bytecodealliance/wasmtime", branch = "release-37.0.0", features = ["p3"] }
 wit-component = "0.239.0"
 wit-parser = "0.239.0"
 

Cargo.toml

@@ -75,6 +75,7 @@ impl Default for Config {
         inner.async_support(true);
         inner.epoch_interruption(true);
         inner.wasm_component_model(true);
+        inner.wasm_component_model_async(true);
         // If targeting musl, disable native unwind to address this issue:
         // https://github.com/spinframework/spin/issues/2889
         // TODO: remove this when wasmtime is updated to >= v27.0.0

crates/core/src/lib.rs

@@ -8,9 +8,11 @@ edition = { workspace = true }
 anyhow = { workspace = true }
 bytes = { workspace = true }
 http = { workspace = true }
+http-body = { workspace = true }
 http-body-util = { workspace = true }
 hyper = { workspace = true }
 hyper-util = { workspace = true }
+pin-project-lite = { workspace = true }
 reqwest = { workspace = true, features = ["gzip"] }
 rustls = { workspace = true }
 serde = { workspace = true }

crates/factor-outbound-http/Cargo.toml

@@ -31,6 +31,8 @@ pub use wasmtime_wasi_http::{
     HttpResult,
 };
 
+pub use wasi::{p2_to_p3_error_code, p3_to_p2_error_code};
+
 #[derive(Default)]
 pub struct OutboundHttpFactor {
     _priv: (),