Reddit OAuth2 API循环重定向

我试图发送一个 POST 根据以下文档,向Reddit API发出获取访问令牌的授权请求: https://github.com/reddit-archive/reddit/wiki/oauth2

原因:org.apache.http.client.CircularRedirectException:循环重定向到' https://www.reddit.com/api/v1/access_token

这是 Kotlin 使用的代码 Apache Commons HTTP

@Test
fun testOauthAuthenticationManual() {

    val client = DefaultHttpClient()
    client.redirectStrategy = LaxRedirectStrategy()
    val post = HttpPost("https://www.reddit.com/api/v1/access_token")
    post.addHeader("Authorization", "Basic a3E0RWVocURGeWVoUWc6UVYyYjU0cldDeTJ4aHNZc292ZXNTcVVQc2tJ")
    post.addHeader("Content-Type", "application/x-www-form-urlencoded")
    post.addHeader("User-Agent", "Just testing")
    post.addHeader("Host", "reddit.com")

    val parameters = listOf<NameValuePair>(
            BasicNameValuePair("grant_type", "authorization_code"),
            BasicNameValuePair("redirect_uri", "http://address.co.uk"),
            BasicNameValuePair("code", "2dYqDpjs6lA7FVvUILgDaxKS2ww"))

    post.entity = UrlEncodedFormEntity(parameters, "UTF-8")

    try {
        val response = client.execute(post)
        if (response.statusLine.statusCode == 200) {
            // continue
        } else {
            throw HttpClientException(response.statusLine.reasonPhrase)
        }
    } catch (e: IOException) {
        throw HttpClientException("Could not execute HTTP request: ", e)
    }
}

我在设置我的请求时做错了什么?