fix(httpd): abort processing write request when encountering a precis…

…ion error (influxdata#21746)

services/httpd/handler.go

@@ -810,7 +810,7 @@ func (h *Handler) async(q *influxql.Query, results <-chan *query.Result) {
 // bucket2drbp extracts a bucket and retention policy from a properly formatted
 // string.
 //
-// The 2.x compatible endpoints encode the databse and retention policy names
+// The 2.x compatible endpoints encode the database and retention policy names
 // in the database URL query value.  It is encoded using a forward slash like
 // "database/retentionpolicy" and we should be able to simply split that string
 // on the forward slash.
@@ -853,6 +853,7 @@ func (h *Handler) serveWriteV2(w http.ResponseWriter, r *http.Request, user meta
 	default:
 		err := fmt.Sprintf("invalid precision %q (use ns, us, ms or s)", precision)
 		h.httpError(w, err, http.StatusBadRequest)
+		return
 	}
 
 	db, rp, err := bucket2dbrp(r.URL.Query().Get("bucket"))
@@ -872,6 +873,7 @@ func (h *Handler) serveWriteV1(w http.ResponseWriter, r *http.Request, user meta
 	default:
 		err := fmt.Sprintf("invalid precision %q (use n, u, ms, s, m or h)", precision)
 		h.httpError(w, err, http.StatusBadRequest)
+		return
 	}
 
 	db := r.URL.Query().Get("db")