Fix examples

Cargo.toml

@@ -7,10 +7,6 @@ authors = ["Fermyon Engineering <engineering@fermyon.com>"]
 [lib]
 crate-type = ["cdylib"]
 
-[package.metadata.component]
-package = "component:spin-fileserver-example"
-adapter = "adapters/fd1e948d/wasi_snapshot_preview1.reactor.wasm"
-
 [dependencies]
 cargo-component-bindings = "0.4.0"
 # Helpful crate to manage errors.

examples/javascript/.gitignore

@@ -0,0 +1,3 @@
+node_modules/
+http.wasm
+composed.wasm

examples/javascript/README.md

@@ -11,28 +11,18 @@ component for serving static files.
 - [Spin v2.0+](https://developer.fermyon.com/spin/install)
 - [Rust](https://rustup.rs/)
 - [cargo-component](https://github.com/bytecodealliance/cargo-component)
-- [wasm-tools](https://github.com/bytecodealliance/wasm-tools/)
-  - Note that you'll need [this fork](https://github.com/dicej/wasm-tools/tree/wasm-compose-resource-imports) until [this PR](https://github.com/bytecodealliance/wasm-tools/pull/1261) has been merged and released.
+- [wac](https://github.com/bytecodealliance/wac)
 - [NodeJS](https://nodejs.org/en/download)
 - [componentize-js](https://github.com/dicej/componentize-js)
 - [curl](https://curl.se/download.html) or a web browser for testing
 
 Once you have Rust and NodeJS installed, the following should give you everything else:
 
-*NOTE*: Until https://github.com/bytecodealliance/componentize-js/pull/69 has
-been merged, you'll need to build and install `componentize-js` from source
-using
-https://github.com/dicej/componentize-js/tree/imported-resource-destructors
-instead of the `npm install` command below.  See the README.md in that
-repository for instructions.
-
 ```shell
 rustup target add wasm32-wasi
 cargo install cargo-component
-cargo install --locked --git https://github.com/dicej/wasm-tools \
-    --branch wasm-compose-resource-imports wasm-tools
-# See NOTE above for installing `componentize-js`
-# npm install @bytecodealliance/componentize-js
+cargo install wac-cli
+npm install -g @bytecodealliance/jco @bytecodealliance/componentize-js
 ```
 
 ## Building and Running

examples/javascript/app.mjs

@@ -1,5 +1,5 @@
-import { handle as spinFileserverHandle } from "wasi:http/incoming-handler@0.2.0-rc-2023-10-18"
-import { OutgoingResponse, ResponseOutparam, OutgoingBody, Fields } from "wasi:http/types@0.2.0-rc-2023-10-18"
+import { handle as spinFileserverHandle } from "wasi:http/incoming-handler@0.2.0"
+import { OutgoingResponse, ResponseOutparam, OutgoingBody, Fields } from "wasi:http/types@0.2.0"
 
 const encoder = new TextEncoder()
 const disposeSymbol = Symbol.dispose || Symbol.for('dispose')
@@ -10,14 +10,13 @@ function handle(request, responseOut) {
 
     if (method.tag === "get") {
         if (path === "/hello") {
-            const response = new OutgoingResponse(
-                200,
-                new Fields([["content-type", encoder.encode("text/plain")]])
-            )
-
+            const fields = new Fields()
+            fields.append("content-type", encoder.encode("text/plain"))
+            const response = new OutgoingResponse(fields)
+
             const responseBody = response.write()
             ResponseOutparam.set(responseOut, { tag: "ok", val: response })
-            
+
             const responseStream = responseBody.write()
             responseStream.blockingWriteAndFlush(encoder.encode("Hello, world!"))
             responseStream[disposeSymbol]()
@@ -26,7 +25,8 @@ function handle(request, responseOut) {
             spinFileserverHandle(request, responseOut)
         }
     } else {
-        const response = new OutgoingResponse(400, new Fields([]))
+        const response = new OutgoingResponse(new Fields([]))
+        response.setSatusCode(400)
         ResponseOutparam.set(responseOut, { tag: "ok", val: response })
         OutgoingBody.finish(response.write())
     }

examples/javascript/build.mjs

@@ -2,11 +2,10 @@ import { componentize } from "@bytecodealliance/componentize-js"
 import { readFile, writeFile } from "node:fs/promises"
 
 const { component } = await componentize(
-    await readFile("app.mjs"),
+    await readFile("app.mjs", "utf-8"),
     {
         witPath: "../wit",
         worldName: "proxy",
-        preview2Adapter: "../../adapters/fd1e948d/wasi_snapshot_preview1.reactor.wasm",
         enableStdout: true,
     }
 );