go example working

examples/go/go-default-wasi-http/go.mod

@@ -0,0 +1,5 @@
+module pack/name
+
+go 1.20
+
+require github.com/golemcloud/golem-go v1.1.0

examples/go/go-default-wasi-http/go.sum

@@ -0,0 +1,2 @@
+github.com/golemcloud/golem-go v1.1.0 h1:By+OBuRu4c3WTuf2OKh71yY7rgOyLXzUgr7Y+98BjGk=
+github.com/golemcloud/golem-go v1.1.0/go.mod h1:VLL22qVo5R2+jGLO43tLPpPjf2WrA6B7GQoqXKnSODo=

examples/go/go-default-wasi-http/golem.yaml

@@ -0,0 +1,49 @@
+# Schema for IDEA:
+# $schema: https://schema.golem.cloud/app/golem/1.1.1/golem.schema.json
+# Schema for vscode-yaml
+# yaml-language-server: $schema=https://schema.golem.cloud/app/golem/1.1.1/golem.schema.json
+
+tempDir: build/golem-temp
+components:
+  pack:name:
+    sourceWit: wit
+    generatedWit: wit-generated
+    componentWasm: build/adapted-components/component_name.wasm
+    linkedWasm: build/linked-components/component_name_linked.wasm
+    build:
+    - command: wit-bindgen tiny-go --rename-package binding --out-dir binding ./wit-generated
+      rmdirs:
+      - binding
+      mkdirs:
+      - binding
+      sources:
+      - wit-generated
+      targets:
+      - binding
+    - command: tinygo build -target=wasi -tags=purego -o build/components/component_name.wasm main.go
+      mkdirs:
+      - build/components
+      sources:
+      - component_name
+      - main.go
+      targets:
+      - build/components/component_name.wasm
+    - command: wasm-tools component embed wit-generated build/components/component_name.wasm --output build/embedded-components/component_name.wasm
+      mkdirs:
+      - build/embedded-components
+      sources:
+      - wit-generated
+      - build/components/component_name.wasm
+      targets:
+      - build/embedded-components/component_name.wasm
+    - command: wasm-tools component new build/embedded-components/component_name.wasm -o build/adapted-components/component_name.wasm --adapt adapters/tier1/wasi_snapshot_preview1.wasm
+      mkdirs:
+      - build/adapted-components
+      sources:
+        - adapters/tier1/wasi_snapshot_preview1.wasm
+        - build/embedded-components/component_name.wasm
+      targets:
+        - build/adapted-components/component_name.wasm
+    clean:
+      - build
+      - binding

examples/go/go-default-wasi-http/main.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"pack/name/binding"
+)
+
+// Helper type aliases to make code more readable
+type HttpRequest = binding.ExportsWasiHttp0_2_0_IncomingHandlerIncomingRequest
+type HttpResponseOut = binding.ExportsWasiHttp0_2_0_IncomingHandlerResponseOutparam
+type HttpOutgoingResponse = binding.WasiHttp0_2_0_TypesOutgoingResponse
+type HttpError = binding.WasiHttp0_2_0_TypesErrorCode
+
+func init() {
+	binding.SetExportsWasiHttp0_2_0_IncomingHandler(&ComponentNameImpl{})
+}
+
+type ComponentNameImpl struct {}
+
+// Implementation of the exported interface
+
+func (e *ComponentNameImpl) Handle(request HttpRequest, responseOut HttpResponseOut) {
+	// Construct HttpResponse to send back
+	headers := binding.NewFields()
+	httpResponse := binding.NewOutgoingResponse(headers)
+	httpResponse.SetStatusCode(200)
+	httpResponse.Body().Unwrap().Write().Unwrap().BlockingWriteAndFlush([]uint8("Hello from Go!\n")).Unwrap()
+
+	// Send HTTP response
+	okResponse := binding.Ok[HttpOutgoingResponse, HttpError](httpResponse)
+	binding.StaticResponseOutparamSet(responseOut, okResponse)
+}
+
+func main() {}

examples/go/go-default-wasi-http/metadata.json

@@ -0,0 +1,13 @@
+{
+  "description": "A Golem worker implementing wasi:http/incoming-handler. For use with the http-handler api gateway binding type",
+  "requiresAdapter": true,
+  "adapterTarget": "adapters",
+  "requiresGolemHostWIT": true,
+  "requiresWASI": true,
+  "instructions": "INSTRUCTIONS-app",
+  "exclude": [
+    "wit-generated",
+    "build",
+    "main.wasm"
+  ]
+}

examples/go/go-default-wasi-http/wit/component-name.wit

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+package pack:name;
+
+// See https://component-model.bytecodealliance.org/design/wit.html for more details about the WIT syntax
+// See https://github.com/WebAssembly/wasi-http for an introduction to wasi-http
+
+world component-name {
+  // Always required due to a limitation of the bindings generation in componentize-py.
+  // This import will fail if removed https://github.com/bytecodealliance/componentize-py/blob/c50822c825b4333ff41a0ea3cd9e0c9bc3df49da/bundled/poll_loop.py#L15
+  import wasi:http/outgoing-handler@0.2.0;
+
+  export wasi:http/incoming-handler@0.2.0;
+}