The Go kit cannot update K/V values
ereslibre opened this issue · comments
Describe the bug
When using the Go kit, it's not possible to update K/V values. An example worker as documented here:
package main
import (
"fmt"
"net/http"
"strconv"
"github.com/vmware-labs/wasm-workers-server/kits/go/worker"
)
func main() {
worker.ServeFunc(func(w http.ResponseWriter, r *http.Request) {
cache, _ := r.Context().Value(worker.CacheKey).(map[string]string)
var countNum uint32
if count, ok := cache["counter"]; ok {
n, _ := strconv.ParseUint(count, 10, 32)
countNum = uint32(n)
}
body := fmt.Sprintf("<!DOCTYPE html>"+
"<body>"+
"<h1>Key / Value store in Go</h1>"+
"<p>Counter: %d</p>"+
"<p>This page was generated by a Wasm module built from Go.</p>"+
"</body>", countNum)
cache["counter"] = fmt.Sprintf("%d", countNum+1)
w.Header().Set("x-generated-by", "wasm-workers-server")
w.Write([]byte(body))
})
}Won't update the cache counter number. The Go Kit should have functions that allow inserting values into the K/V store, as the Rust Kit exposes.
Expected behavior
It's possible to update the K/V store from a Go worker.
Additional context
No response
@ereslibre I updated the label to bug as this is an expected behavior from the kit :)
@ereslibre Are you saying that it's not possible to increase the counter via browser access? I tried using a browser and found that I can increase the count normally.
Just double checked the example program that triggered this bug report. It was lacking the cache update:
diff --git a/docker-wasm/apps-src/user-generation-go/main.go b/docker-wasm/apps-src/user-generation-go/main.go
index 0d27c232..5b7175a2 100644
--- a/docker-wasm/apps-src/user-generation-go/main.go
+++ b/docker-wasm/apps-src/user-generation-go/main.go
@@ -57,11 +57,12 @@ func main() {
}
fileContents := string(fileContents_)
- generatedUserCount := uint32(0)
+ generatedUserCount := uint32(1)
if count, ok := cache["generated_users_counter"]; ok {
n, _ := strconv.ParseUint(count, 10, 32)
- generatedUserCount = uint32(n)
+ generatedUserCount = uint32(n) + 1
}
+ cache["generated_users_counter"] = fmt.Sprintf("%d", generatedUserCount)
responseData := ResponseData{
User: userClosing, sorry for the noise.