Add API endpoint to fetch redis info

redis_info_handlers.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"strings"
+
+	"github.com/go-redis/redis/v8"
+)
+
+// ****************************************************************************
+// This file defines:
+//   - http.Handler(s) for redis info related endpoints
+// ****************************************************************************
+
+func newRedisInfoHandlerFunc(rdb *redis.Client) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		ctx := context.Background()
+		res, err := rdb.Info(ctx).Result()
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		info := parseRedisInfo(res)
+		if err := json.NewEncoder(w).Encode(info); err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+	}
+}
+
+// Parses the return value from the INFO command.
+// See https://redis.io/commands/info#return-value.
+func parseRedisInfo(infoStr string) map[string]string {
+	info := make(map[string]string)
+	lines := strings.Split(infoStr, "\r\n")
+	for _, l := range lines {
+		kv := strings.Split(l, ":")
+		if len(kv) == 2 {
+			info[kv[0]] = kv[1]
+		}
+	}
+	return info
+
+}