feat: implement websocket and UI

sio/rng.go

@@ -0,0 +1,28 @@
+package sio
+
+import (
+	"math/rand"
+	"sync"
+	"time"
+)
+
+// RNG is a random number generator that is safe for concurrent use by multiple go routines
+type RNG struct {
+	r  *rand.Rand
+	mu *sync.Mutex
+}
+
+// Read reads len(b) random bytes into b and always returns a nil error
+func (r *RNG) Read(b []byte) (int, error) {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	return r.r.Read(b)
+}
+
+// NewRNG creates a new random number generator
+func NewRNG() *RNG {
+	return &RNG{
+		r:  rand.New(rand.NewSource(time.Now().UnixNano())),
+		mu: &sync.Mutex{},
+	}
+}