HTTP post/API请求在bash上从CURL发送时有效，在Apache http

Question

我正在尝试使用apache http组件与Spotify api接口。我试图发送的请求在#1下面有详细说明。当我使用curl从bash发送这个请求时

卷曲 -H “授权：基本约门” -d grant_type=client_credentials https://accounts.spotify.com/api/token

我拿回了一个像网站描述的令牌

但是，据我所知，以下java代码执行相同的请求，返回400错误

密码

    String encoded = "SOMETOKEN";
    CloseableHttpResponse response = null;
    try {
        CloseableHttpClient client = HttpClients.createDefault();
        URI auth = new URIBuilder()
                .setScheme("https")
                .setHost("accounts.spotify.com")
                .setPath("/api/token")
                .setParameter("grant_type", "client_credentials")
                .build();

        HttpPost post = new HttpPost(auth);
        Header header = new BasicHeader("Authorization", "Basic " + encoded);
        post.setHeader(header);
        try {
            response = client.execute(post);
            response.getEntity().writeTo(System.out);
        }
        finally {
            response.close();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

错误

{"错误"："server_error"，"error_description"："意外状态： 400"}

代码打印的URI如下所示

https://accounts.spotify.com/api/token?grant_type=client_credentials

标题是这样的

授权：基本的东西

我没有正确地构造请求吗？还是我遗漏了什么？

Answer 1

对内容类型为< code > application/x-www-form-urlencoded 的正文中的数据使用表单url编码:

CloseableHttpClient client = HttpClients.createDefault();

HttpPost post = new HttpPost("https://accounts.spotify.com/api/token");
post.setHeader(HttpHeaders.CONTENT_TYPE, "application/x-www-form-urlencoded");
post.setHeader(HttpHeaders.AUTHORIZATION, "Basic " + encoded);
StringEntity data = new StringEntity("grant_type=client_credentials");
post.setEntity(data);

HttpResponse response = client.execute(post);