Environment variables
Read environment variables and arbitrary bindings declared in wrangler.toml from Go.
Environment variables and bindings are declared in wrangler.toml (or wrangler.jsonc) and read through the cloudflare package.
Declare variables
[vars]
MY_ENV = "my env value"Read a variable
cloudflare.Getenv returns the value of an environment variable as a string. It returns an empty string when the variable is not defined.
package main
import (
"fmt"
"net/http"
"github.com/syumai/workers-go"
"github.com/syumai/workers-go/cloudflare"
)
func main() {
handler := http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "MY_ENV: %s", cloudflare.Getenv("MY_ENV"))
})
workers.Serve(handler)
}Read an arbitrary binding
For bindings that are not plain strings — Service Bindings, KV namespaces, and so on — use cloudflare.GetBinding, which returns the raw js.Value. You can pass it to helpers such as fetch.WithBinding.
bind := cloudflare.GetBinding("hello")
fc := fetch.NewClient(fetch.WithBinding(bind))See Outbound fetch and Service Bindings for a complete example.