我正在使用 Java 中的 PayPal REST API 向测试（沙箱）服务器发出访问令牌的请求，该请求成功，然后将该访问令牌发送回相同的沙箱服务器以进行支付，但失败并显示 401 Not Authorized .
我按照此处找到的 PayPal REST API 说明进行操作：https ://developer.paypal.com/webapps/developer/docs/api/#authentication--headers和此处https://developer.paypal.com/webapps/developer/docs /integration/direct/make-your-first-call/
我尝试使用该OAuthTokenCredential对象来提供我的clientId，clientSecret但它只返回访问令牌，而不是appIDPayPal 提供的，也不expiresIn是以分钟为单位的时间。此外，它还抱怨sdk_conf.properties我的类路径中缺少文件。
然后，我创建了自己的类来使用 Apache 的 HttpClient 进行调用以获得完整的响应，并且有效：
RestEasy 的自定义 PayPal API 接口
@Path("v1/oauth2/token")
public interface PayPalOAuthAPI {
@POST
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
public OAuthInfo requestAccessToken(
@HeaderParam("Authorization") String basicEncodedToken,
String requestBody
);
}
自定义 OAuth 令牌请求
private OAuthInfo getOAuthInfo() {
OAuthInfo info = null;
PayPalOAuthAPI client = HttpClientFactory.createRestEasyClient(80, 443, 120, 2,
API_ENDPOINT, PayPalOAuthAPI.class, true);
info = client.requestAccessToken("Basic "+
generateBase64String(PP_API_USER, PP_API_SECRET),
"grant_type=client_credentials");
if (info == null) {
throw new RuntimeException(APIResultCodes.REMOTE_UNAUTHORIZED,
"Could not authenticate with PayPal.");
}
return info;
}
这一切都正常工作，并返回一个 200 OK 状态和预期的 JSON 响应，包括访问令牌。
然后，我获取该令牌并将其提供给我的Payment对象，该对象使用 PayPal 的代码与他们的服务器通信（在后台我相信它是基本的 java.lang.net.HttpConnection 代码）并返回 401 Unauthorized。
使用 PayPal 的 REST API 进行支付调用
// get a new token
String accessToken = getOAuthInfo().getAccessToken();
// configProps is a Properties object pre-populated with sdk_conf.properties
// values except service.EndPoint, clientID, and clientSecret
configProps.setProperty("service.EndPoint", API_ENDPOINT);
// ... transaction objects omitted
try {
Payment payment = new Payment();
Payment.initConfig(configProps);
payment.setIntent(Intent.sale.toString());
payment.setPayer(payer);
payment.setTransactions(transactions);
Payment createdPayment = payment.create(accessToken);
} catch (PayPalRESTException ex) {
LOG.error("Failed to submit donation", ex);
}
日志输出
（包括 HttpClient 请求/响应的 ID 已编辑）
2013-08-19 16:34:11,077 [qtp1005310362-44] DEBUG:org.apache.http.impl.conn.DefaultClientConnection Sending request: POST /v1/oauth2/token HTTP/1.1
2013-08-19 16:34:11,077 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "POST /v1/oauth2/token HTTP/1.1[\r][\n]"
2013-08-19 16:34:11,077 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "Content-Type: application/x-www-form-urlencoded[\r][\n]"
2013-08-19 16:34:11,077 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "Accept: application/json[\r][\n]"
2013-08-19 16:34:11,077 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "Authorization: Basic QWM1UmNoQ3g3dHB1bWZSZW9rcUR3MW41bHRXaktQU0xRODIyWUJWWXpEdXpZUGJuc0J0eDZYWGlqX1pROkVJVnQ5eERmM2JnQmw1OG5KYlZ2VmtSR3JCaVZVN1BIWGtSV01mQjVqb3NxRTNkbWxCcF9TV05BdU91eA==[\r][\n]"
2013-08-19 16:34:11,077 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "Accept-Encoding: gzip, deflate[\r][\n]"
2013-08-19 16:34:11,077 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "Content-Length: 29[\r][\n]"
2013-08-19 16:34:11,077 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "Host: api.sandbox.paypal.com[\r][\n]"
2013-08-19 16:34:11,077 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "Connection: Keep-Alive[\r][\n]"
2013-08-19 16:34:11,077 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "User-Agent: Apache-HttpClient/4.2 (java 1.5)[\r][\n]"
2013-08-19 16:34:11,078 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "[\r][\n]"
2013-08-19 16:34:11,078 [qtp1005310362-44] DEBUG:org.apache.http.wire >> "grant_type=client_credentials"
2013-08-19 16:34:12,690 [qtp1005310362-44] DEBUG:org.apache.http.wire << "HTTP/1.1 200 OK[\r][\n]"
2013-08-19 16:34:12,690 [qtp1005310362-44] DEBUG:org.apache.http.wire << "Server: Apache-Coyote/1.1[\r][\n]"
2013-08-19 16:34:12,690 [qtp1005310362-44] DEBUG:org.apache.http.wire << "Date: Mon, 19 Aug 2013 20:34:11 GMT[\r][\n]"
2013-08-19 16:34:12,690 [qtp1005310362-44] DEBUG:org.apache.http.wire << "PayPal-Debug-Id: d29c41eb8625a[\r][\n]"
2013-08-19 16:34:12,690 [qtp1005310362-44] DEBUG:org.apache.http.wire << "Content-Type: application/json[\r][\n]"
2013-08-19 16:34:12,690 [qtp1005310362-44] DEBUG:org.apache.http.wire << "Content-Length: 282[\r][\n]"
2013-08-19 16:34:12,690 [qtp1005310362-44] DEBUG:org.apache.http.wire << "[\r][\n]"
2013-08-19 16:34:12,690 [qtp1005310362-44] 2013-08-19 16:34:12,691 [qtp1005310362-44] DEBUG:org.apache.http.impl.client.DefaultHttpClient Connection can be kept alive indefinitely
2013-08-19 16:34:12,691 [qtp1005310362-44] DEBUG:org.apache.http.wire << "{"scope":"https://api.paypal.com/v1/payments/.* https://api.paypal.com/v1/vault/credit-card https://api.paypal.com/v1/vault/credit-card/.* openid","access_token":"RVATuLOQB0WFX
keSDZQw4ZnyfIduPCF2j7sMhcfspwo","token_type":"Bearer","app_id":"APP-80W284285Q519543T","expires_in":28800}"
2013-08-19 16:34:12,693 [qtp1005310362-44] DEBUG:org.apache.http.impl.conn.PoolingClientConnectionManager Connection [id: 5][route: {s}->https://api.sandbox.paypal.com] can be kept alive indefinitely
2013-08-19 16:34:12,693 [qtp1005310362-44] DEBUG:org.apache.http.impl.conn.PoolingClientConnectionManager Connection released: [id: 5][route: {s}->https://api.sandbox.paypal.com][total kept alive: 1; route allocated: 1 of 2; total allocated: 1 of 2]
2013-08-19 16:34:15,197 [qtp1005310362-44] ERROR:com.example.gateways.paypal.payments.PayPalPaymentsProREST Failed to submit donation
com.paypal.core.rest.PayPalRESTException: Error code : 401 with response : Server returned HTTP response code: 401 for URL: https://api.sandbox.paypal.com/v1/payments/payment
我注意到 API 发送给我的范围和 URL 是两个不同的东西。也许我缺少一些将 API 调用发送到沙盒 URL 的配置？
在我上面的代码中，您可以看到我正在设置我的测试service.EndPoint中API_ENDPOINT设置为的https://api.sandbox.paypal.com。我也没有在我的属性对象中提供clientIDor ，但即使提供它们也会给我一个 401。clientSecret
我还缺少什么？