Fix WASM settings

pkg/plugins/fixtures/withoutsocket/demo.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+
+	"github.com/http-wasm/http-wasm-guest-tinygo/handler"
+	"github.com/http-wasm/http-wasm-guest-tinygo/handler/api"
+)
+
+type config struct {
+	File string   `json:"file"`
+	Envs []string `json:"envs"`
+}
+
+var cfg config
+
+// Built with
+// tinygo build -o plugin.wasm -scheduler=none --no-debug -target=wasi ./demo.go
+func main() {
+	err := json.Unmarshal(handler.Host.GetConfig(), &cfg)
+	if err != nil {
+		handler.Host.Log(api.LogLevelError, fmt.Sprintf("Could not load config %v", err))
+		os.Exit(1)
+	}
+
+	handler.HandleRequestFn = handleRequest
+}
+
+func handleRequest(req api.Request, resp api.Response) (next bool, reqCtx uint32) {
+	var bodyContent []byte
+	if cfg.File != "" {
+		var err error
+		bodyContent, err = os.ReadFile(cfg.File)
+		if err != nil {
+			resp.SetStatusCode(http.StatusInternalServerError)
+			resp.Body().Write([]byte(fmt.Sprintf("error reading file %q: %w", cfg.File, err.Error())))
+			return false, 0
+		}
+	}
+
+	if len(cfg.Envs) > 0 {
+		for _, env := range cfg.Envs {
+			bodyContent = append(bodyContent, []byte(os.Getenv(env)+"\n")...)
+		}
+	}
+
+	resp.Body().Write(bodyContent)
+	return false, 0
+}