    detectMimeType(filename) {
        if (!filename) {
            return defaultMimeType;
        }

        let parsed = path.parse(filename);
        let extension = (parsed.ext.substr(1) || parsed.name || '')
            .split('?')
            .shift()
            .trim()
            .toLowerCase();
        let value = defaultMimeType;

        if (extensions.has(extension)) {
            value = extensions.get(extension);
        }

        if (Array.isArray(value)) {
            return value[0];
        }
        return value;
    },
The software constructs a string for a command to executed by a separate component
in another control sphere, but it does not properly delimit the
intended arguments, options, or switches within that command string.