request.getHeaderNames()

• 返回值: <string[]>

返回一个数组，包含当前要发送的唯一头部名称。所有头部名称均为小写。

【Returns an array containing the unique names of the current outgoing headers. All header names are lowercase.】

request.setHeader('Foo', 'bar');
request.setHeader('Cookie', ['foo=bar', 'bar=baz']);

const headerNames = request.getHeaderNames();
// headerNames === ['foo', 'cookie'] 拷贝