Question

我在使用授权代码授权来授权spotify web api时遇到问题。我知道我必须填写我的客户端ID，客户端密码并将uri重定向到字符串，但我不知道如何获取名为 code 的字符串，这是获取访问令牌所必需的。

final String clientId = "<your_client_id>";
final String clientSecret = "<your_client_secret>";
final String redirectURI = "<your_redirect_uri>";

final Api api = Api.builder()
    .clientId(clientId)
    .clientSecret(clientSecret)
    .redirectURI(redirectURI)
    .build();

/* Set the necessary scopes that the application will need from the user */
final List<String> scopes = Arrays.asList("user-read-private", "user-read-email");

/* Set a state. This is used to prevent cross site request forgeries. */
final String state = "someExpectedStateString";

String authorizeURL = api.createAuthorizeURL(scopes, state);

/* Continue by sending the user to the authorizeURL, which will look something like
https://accounts.spotify.com:443/authorize?client_id=5fe01282e44241328a84e7c5cc169165&response_type=code&redirect_uri=https://example.com/callback&scope=user-read-private%20user-read-email&state=some-state-of-my-choice
*/

然后

/* Application details necessary to get an access token */
final String code = "<insert code>"; //I don't know where I get the value for this string from

/* Make a token request. Asynchronous requests are made with the .getAsync method and synchronous requests
* are made with the .get method. This holds for all type of requests. */
final SettableFuture<AuthorizationCodeCredentials> authorizationCodeCredentialsFuture = api.authorizationCodeGrant(code).build().getAsync();

/* Add callbacks to handle success and failure */
Futures.addCallback(authorizationCodeCredentialsFuture, new FutureCallback<AuthorizationCodeCredentials>() {

@Override
public void onSuccess(AuthorizationCodeCredentials authorizationCodeCredentials) {
    /* The tokens were retrieved successfully! */

    /* Set the access token and refresh token so that they are used whenever needed */
    api.setAccessToken(authorizationCodeCredentials.getAccessToken());
    api.setRefreshToken(authorizationCodeCredentials.getRefreshToken());
}

@Override
public void onFailure(Throwable throwable) {
     /* Let's say that the client id is invalid, or the code has been used more than once,
     * the request will fail. Why it fails is written in the throwable's message. */

      }
});

您知道如何获取此代码并成功获取访问令牌吗？

谢谢！

Answer 1

正如您在Authorization Code Flow的说明中所述，您需要将用户发送到Spotify网址。此URL在authorizeURL字符串中提供：

/* Continue by sending the user to the authorizeURL, which will look 
something like
https://accounts.spotify.com:443/authorize?client_id=5fe01282e44241328a84e7c5cc169165&response_type=code&redirect_uri=https://example.com/callback&scope=user-read-private%20user-read-email&state=some-state-of-my-choice
*/

用户登录并获得访问给定范围的应用程序权限后，Spotify会将用户重定向到回调网址。这就是它变得复杂的地步。您需要在回调网址中接收Spotify提供的代码参数。此代码参数是正在进行的过程所需的值。您正在使用的spotify-web-api-java不提供接收此请求的任何内容。你需要通过使用例如一个Spring RESTful Web Service。

Answer 2

我现在已经解决了这个问题。

您不必制作Web服务！解决方案实际上非常简单。你只需要用

创建一个Intent

Intent.ACTION_VIEW

作为第一个参数，并将您的url作为第二个参数，并以Intent作为参数调用startActivity。然后你必须添加这个

<intent-filter>
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />

    <data
         android:host="callback"
         android:scheme="yourcustomprotocol" />
</intent-filter>

清单中的活动标记，最后但并非最不重要的是捕获

中的回调

onNewIntent（最终意图意图）

在这里你可以获得你可以从中提取代码的意图的网址。

spotify web api授权码授予thelinmichael / spotify-web-api-java android

2 个答案: