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Merge pull request #30 from aki-0421/service-bindings
Add service bindings
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dist |
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.PHONY: dev | ||
dev: | ||
wrangler dev | ||
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.PHONY: build | ||
build: | ||
mkdir -p dist | ||
tinygo build -o ./dist/app.wasm -target wasm ./... | ||
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.PHONY: publish | ||
publish: | ||
wrangler publish |
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# service-bindings | ||
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- Service bindings are an API that facilitate Worker-to-Worker communication via explicit bindings defined in your configuration. | ||
- In this example, invoke [hello](https://github.com/syumai/workers/tree/main/examples/hello) using Service bindings. | ||
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## Development | ||
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### Requirements | ||
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This project requires these tools to be installed globally. | ||
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* wrangler | ||
* tinygo | ||
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### Deploy Steps | ||
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1. Deploy [hello](https://github.com/syumai/workers/tree/main/examples/hello) first. | ||
2. Define service bindings in `wrangler.toml`. | ||
```toml | ||
services = [ | ||
{ binding = "hello", service = "hello" } | ||
] | ||
``` | ||
3. Deploy this example. | ||
``` | ||
make build # build Go Wasm binary | ||
make publish # publish worker | ||
``` | ||
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## Documents | ||
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- https://developers.cloudflare.com/workers/runtime-apis/service-bindings/ |
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module github.com/syumai/fetch | ||
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go 1.18 | ||
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require github.com/syumai/workers v0.0.0 | ||
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replace github.com/syumai/workers => ../../ |
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github.com/syumai/workers v0.1.0 h1:z5QfQR2X+PCKzom7RodpI5J4D5YF7NT7Qwzb9AM9dgY= | ||
github.com/syumai/workers v0.1.0/go.mod h1:alXIDhTyeTwSzh0ZgQ3cb9HQPyyYfIejupE4Z3efr14= |
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package main | ||
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import ( | ||
"fmt" | ||
"io" | ||
"net/http" | ||
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"github.com/syumai/workers" | ||
"github.com/syumai/workers/cloudflare" | ||
"github.com/syumai/workers/cloudflare/fetch" | ||
) | ||
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func main() { | ||
handler := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) { | ||
ctx := req.Context() | ||
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obj := cloudflare.GetBinding(ctx, "hello") | ||
cli := fetch.NewClient(fetch.WithBinding(obj)) | ||
r, err := fetch.NewRequest(ctx, http.MethodGet, req.URL.String(), nil) | ||
if err != nil { | ||
fmt.Println(err) | ||
w.WriteHeader(http.StatusInternalServerError) | ||
return | ||
} | ||
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res, err := cli.Do(r) | ||
if err != nil { | ||
fmt.Println(err) | ||
w.WriteHeader(http.StatusInternalServerError) | ||
return | ||
} | ||
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io.Copy(w, res.Body) | ||
}) | ||
workers.Serve(handler) | ||
} |
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import "../assets/polyfill_performance.js"; | ||
import "../assets/wasm_exec.js"; | ||
import mod from "./dist/app.wasm"; | ||
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const go = new Go(); | ||
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const readyPromise = new Promise((resolve) => { | ||
globalThis.ready = resolve; | ||
}); | ||
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const load = WebAssembly.instantiate(mod, go.importObject).then((instance) => { | ||
go.run(instance); | ||
return instance; | ||
}); | ||
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export default { | ||
async fetch(req, env, ctx) { | ||
await load; | ||
await readyPromise; | ||
return handleRequest(req, { env, ctx }); | ||
} | ||
} |
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name = "service-bindings" | ||
main = "./worker.mjs" | ||
compatibility_date = "2023-02-24" | ||
services = [ | ||
{ binding = "hello", service = "hello" } | ||
] | ||
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[build] | ||
command = "make build" |