客户端凭据流出现错误400

Question

我正在尝试对客户端凭据流进行身份验证，但一直返回错误400。我查看了可用的API，但看不出我做错了什么。如果有人能给我一个正确的方向，那太棒了。谢谢

package com.elliott.lyric.io;

import org.apache.commons.codec.binary.Base64;
import org.apache.http.*;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import static org.apache.http.protocol.HTTP.USER_AGENT;

/**
 * Created by elliott on 05/05/2017.
 */
public class SpotifyLoader {

    String nowPlayingURL = "https://api.spotify.com/v1/me/player/currently-playing";
    String authURL = "https://accounts.spotify.com/api/token?grant_type=client_credentials";
    String clientID = "";
    String secretID = "";
    String authScope = "user-read-currently-playing user-read-playback-state";

    public SpotifyLoader() {
        authorize();
        //getRawPlaying();
    }

    void authorize() {
        try {

            HttpClient client = HttpClientBuilder.create().build();
            System.out.println(authURL);
            HttpPost post = new HttpPost(authURL);

// add header
            post.setHeader("User-Agent", USER_AGENT);
            post.setHeader("Content-Type", "application/x-www-form-urlencoded");

            List<NameValuePair> urlParameters = new ArrayList<>();
            String idSecret = clientID + ":" + secretID;
            String idSecretEncoded = new String(Base64.encodeBase64(idSecret.getBytes()));
            urlParameters.add(new BasicNameValuePair("Authorization", "Basic " + idSecretEncoded));

            post.setEntity(new UrlEncodedFormEntity(urlParameters));

            HttpResponse response = client.execute(post);
            System.out.println("Response Code : "
                    + response.getStatusLine().getStatusCode());

            BufferedReader rd = new BufferedReader(
                    new InputStreamReader(response.getEntity().getContent()));

            StringBuffer result = new StringBuffer();
            String line = "";
            while ((line = rd.readLine()) != null) {
                result.append(line);
            }
        } catch (Exception e) {

        }
    }

    void getRawPlaying() {
    }
}

Answer 1

尝试以下更改的请求

>

将查询字符串从url移动到请求正文，使url为<代码>https://accounts.spotify.com/api/token

在标题中发送授权。我刚刚修改了authorize（），如下所示。

void authorize() {
try {

    authURL = "https://accounts.spotify.com/api/token";
    String idSecret = clientID + ":" + secretID;
    String idSecretEncoded = new String(Base64.encodeBase64(idSecret.getBytes()));

    HttpClient client = HttpClientBuilder.create().build();
    HttpPost post = new HttpPost(authURL);

    post.setHeader("User-Agent", USER_AGENT);
    post.setHeader("Content-Type", "application/x-www-form-urlencoded");
    post.setHeader("Authorization", "Basic " + idSecretEncoded);

    List<NameValuePair> urlParameters = new ArrayList<>();
    urlParameters.add(new BasicNameValuePair("grant_type", "client_credentials"));

    post.setEntity(new UrlEncodedFormEntity(urlParameters));

    HttpResponse response = client.execute(post);
    System.out.println("Response Code : " + response.getStatusLine().getStatusCode());

    BufferedReader rd = new BufferedReader(
            new InputStreamReader(response.getEntity().getContent()));

    StringBuffer result = new StringBuffer();
    String line = "";
    while ((line = rd.readLine()) != null) {
        result.append(line);
    }
} catch (Exception e) {
    e.printStackTrace();
}

}