BaiduCloudToken.java
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package com.ectrip.checkincar.plate;
import android.text.TextUtils;
import com.ectrip.checkincar.core.prefs.AppPrefs;
import org.json.JSONObject;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
/**
* 百度智能云 access_token 获取与缓存（AK/SK → token，有效期约 30 天）。
* 全部方法须在后台线程调用。
*/
public final class BaiduCloudToken {
private static final String TOKEN_URL = "https://aip.baidubce.com/oauth/2.0/token";
private static final OkHttpClient CLIENT = new OkHttpClient.Builder()
.connectTimeout(5, TimeUnit.SECONDS)
.readTimeout(10, TimeUnit.SECONDS)
.build();
private BaiduCloudToken() {
}
/** 缓存 token 仍有效（剩余 >24h）则直接用，否则重新获取。失败抛 IOException（中文 message）。 */
public static String getToken() throws IOException {
if (AppPrefs.isCloudTokenValid()) {
return AppPrefs.getCloudToken();
}
return refreshToken();
}
/** 强制用当前 AK/SK 重新鉴权。 */
public static String refreshToken() throws IOException {
String ak = AppPrefs.getCloudAk();
String sk = AppPrefs.getCloudSk();
if (TextUtils.isEmpty(ak) || TextUtils.isEmpty(sk)) {
throw new IOException("未配置 API Key / Secret Key");
}
RequestBody body = new FormBody.Builder()
.add("grant_type", "client_credentials")
.add("client_id", ak)
.add("client_secret", sk)
.build();
Request request = new Request.Builder()
.url(TOKEN_URL)
.post(body)
.addHeader("Content-Type", "application/x-www-form-urlencoded")
.build();
try (Response response = CLIENT.newCall(request).execute()) {
String rs = response.body() != null ? response.body().string() : "";
JSONObject json = new JSONObject(rs);
String token = json.optString("access_token", null);
if (TextUtils.isEmpty(token)) {
AppPrefs.clearCloudToken();
String err = json.optString("error_description",
json.optString("error", "鉴权失败"));
throw new IOException("API Key/Secret 校验失败：" + err);
}
long expiresIn = json.optLong("expires_in", 2592000L);
AppPrefs.setCloudToken(token, expiresIn);
return token;
} catch (IOException e) {
AppPrefs.clearCloudToken();
throw new IOException("无法连接百度云，请检查外网/WiFi（" + e.getMessage() + "）");
} catch (Exception e) {
AppPrefs.clearCloudToken();
throw new IOException("鉴权响应解析失败：" + e.getMessage());
}
}
}