# Util

Utility API for third-party implementations of the dispatcher API.

## `parseHeaders(headers, [obj])`

Receives a header object and returns the parsed value.

Arguments:

- **headers** `Record<string, string | string[]> | (Buffer | string | (Buffer | string)[])[]` (required) - Header object.

- **obj** `Record<string, string | string[]>` (optional) - Object to specify a proxy object. The parsed value is assigned to this object. But, if **headers** is an object, it is not used.

Returns: `Record<string, string | string[]>` If **headers** is an object, it is **headers**. Otherwise, if **obj** is specified, it is equivalent to **obj**.

## `headerNameToString(value)`

Retrieves a header name and returns its lowercase value.

Arguments:

- **value** `string | Buffer` (required) - Header name.

Returns: `string`