WIP: add http middleware template

templates/http-middleware/content/.gitignore

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+target/
+.spin/

templates/http-middleware/content/Cargo.toml.tmpl

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+[package]
+name = "{{project-name | kebab_case}}"
+authors = ["{{authors}}"]
+description = "{{project-description}}"
+version = "0.1.0"
+rust-version = "1.93"
+edition = "2024"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+anyhow = "1"
+spin-sdk = "6.0.0"
+
+[workspace]

templates/http-middleware/content/spin.toml

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+spin_manifest_version = 2
+
+[application]
+name = "{{project-name | kebab_case}}"
+version = "0.1.0"
+authors = ["{{authors}}"]
+description = "{{project-description}}"
+
+[component.{{project-name | kebab_case}}]
+source = "target/wasm32-wasip2/release/{{project-name | snake_case}}.wasm"
+allowed_outbound_hosts = []
+[component.{{project-name | kebab_case}}.build]
+command = "cargo build --target wasm32-wasip2 --release"
+watch = ["src/**/*.rs", "Cargo.toml"]

templates/http-middleware/content/src/lib.rs

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+use spin_sdk::http::{self, HeaderName, HeaderValue, Request, Response};
+use spin_sdk::http_service;
+
+#[http_service]
+async fn handle(mut req: Request) -> http::Result<Response> {
+    // Request runs on the way in, before the next handler.
+    eprintln!("[middleware] --> {} {}", req.method(), req.uri().path());
+
+    // Forward the (modified) request to the next handler in the chain and wait
+    // for its response.
+    let mut resp = http::next(req).await?;
+
+    // Response runs on the way out, after the next handler
+    eprintln!("[middleware] <-- {}", resp.status());
+
+    Ok(resp)
+}

templates/http-middleware/metadata/snippets/component.txt

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+[[trigger.http]]
+component = "{{project-name | kebab_case}}"
+
+[component.{{project-name | kebab_case}}]
+source = "{{ output-path }}/target/wasm32-wasip2/release/{{project-name | snake_case}}.wasm"
+allowed_outbound_hosts = []
+[component.{{project-name | kebab_case}}.build]
+command = "cargo build --target wasm32-wasip2 --release"
+workdir = "{{ output-path }}"
+watch = ["src/**/*.rs", "Cargo.toml"]

templates/http-middleware/metadata/spin-template.toml

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+manifest_version = "1"
+id = "http-middleware"
+description = "http middleware rust template"
+tags = []
+
+[add_component]
+skip_files = ["spin.toml"]
+[add_component.snippets]
+component = "component.txt"
+
+[parameters]
+# These are placehodlers for the template parameters
+# You can add more parameters here, or remove them if you don't need them.
+project-description = { type = "string", prompt = "Description", default = "" }