MAC vendor lookup: Difference between revisions

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@@ Line 984: / Line 984: @@
 }
-System.print(MAC.lookup("FC:FB:FB:01:FA:21"))</lang>
+System.print(MAC.lookup("FC:FB:FB:01:FA:21"))
+for (i in 1..1e8) {} // slow down request
+System.print(MAC.lookup("23:45:67"))</lang>
 which we embed in the following Go program and run it.
@@ Line 1,001: / Line 1,003: @@
 func macLookup(vm *wren.VM, parameters []any) (any, error) {
     mac := parameters[1].(string)
-    resp, _ := http.Get("http://api.macvendors.com/" + mac)
+    resp, err := http.Get("http://api.macvendors.com/" + mac)
+    if err != nil {
-    body, _ := ioutil.ReadAll(resp.Body)
-    return string(body), nil
+        return nil, nil
+    }
-}
+    body, err := ioutil.ReadAll(resp.Body)
+    if err != nil {
+        return nil, nil
+    }
+    var vendor = string(body)
+    if vendor == `{"errors":{"detail":"Not Found"}}` {
+        return "N/A", nil
+    }
+    return vendor, nil
+}
 func main() {
@@ Line 1,020: / Line 1,032: @@
 <pre>
 Cisco Systems, Inc
+N/A
 </pre>