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我正在嘗試使用PayPal .NET RestApiSDK存儲信用卡並在其沙箱中進行付款。我在一個MVC項目中使用.NET 4.5。PayPal RestApiSDK .NET HTTP 503服務器不可用
我跟着示例代碼在這裏： https://developer.paypal.com/webapps/developer/docs/api/#store-a-credit-card
最初，事情很容易。在某一天，我能： -Take多次付款 -store幾張卡 -Look了銷售 -refund銷售 -store卡在跳馬 （基本上，一切都在他們的示例代碼）
永遠自第一天（大約一週）以來，我一直在收到http 503「服務器不可用」錯誤。除非我在睡眠中改變了某些東西，否則我正在使用以前工作的確切代碼。
我聯繫了PayPal支持，並且在幾次來回消息之後，他們讓我知道，儘管他們無法在我的代碼中查明錯誤，但錯誤必須在我身邊，因爲他們的服務器工作正常。
什麼是真奇怪，是我似乎能夠做任何不更改數據。例如，我可以調用payments.List（）。但是，我無法調用creditCard.Create（）或payment.Create（）。
此外，訪問令牌正在創建得很好。行tokenCredential.GetAccessToken（）不返回任何服務器錯誤。當我調試代碼時，它確實返回了一個適當的令牌。
問題： 當我嘗試存儲卡或付款時，可能導致http 503錯誤的原因是什麼？
這是一些相關的代碼。
控制器：
public JsonResult RunTestPayment()
{
string id = ConfigManager.Instance.GetProperties()["ClientID"];
string secret = ConfigManager.Instance.GetProperties()["ClientSecret"];
OAuthTokenCredential tokenCredential = new OAuthTokenCredential(id, secret);
string accessToken = tokenCredential.GetAccessToken();
PayPal.Api.Payments.Address billingAddress = new PayPal.Api.Payments.Address();
billingAddress.line1 = "52 N Main St";
billingAddress.city = "Johnstown";
billingAddress.country_code = "US";
billingAddress.postal_code = "";
billingAddress.state = "OH";
PayPal.Api.Payments.CreditCard creditCard = new PayPal.Api.Payments.CreditCard();
creditCard.number = "4417119669820331";
creditCard.type = "visa";
creditCard.expire_month = 11;
creditCard.expire_year = 2018;
creditCard.cvv2 = "874";
creditCard.first_name = "Joe";
creditCard.last_name = "Shopper";
creditCard.billing_address = billingAddress;
PayPal.Api.Payments.Details amountDetails = new PayPal.Api.Payments.Details();
amountDetails.subtotal = "7.51";
amountDetails.tax = "0.03";
amountDetails.shipping = "0.03";
PayPal.Api.Payments.Amount amount = new PayPal.Api.Payments.Amount();
amount.total = "7.56";
amount.currency = "USD";
amount.details = amountDetails;
PayPal.Api.Payments.Transaction transaction = new PayPal.Api.Payments.Transaction();
transaction.amount = amount;
transaction.description = "This is the payment transaction description.";
List<PayPal.Api.Payments.Transaction> transactions = new List<PayPal.Api.Payments.Transaction>();
transactions.Add(transaction);
PayPal.Api.Payments.FundingInstrument fundingInstrument = new PayPal.Api.Payments.FundingInstrument();
fundingInstrument.credit_card = creditCard;
List<PayPal.Api.Payments.FundingInstrument> fundingInstruments = new List<PayPal.Api.Payments.FundingInstrument>();
fundingInstruments.Add(fundingInstrument);
PayPal.Api.Payments.Payer payer = new PayPal.Api.Payments.Payer();
payer.funding_instruments = fundingInstruments;
payer.payment_method = "credit_card";
PayPal.Api.Payments.Payment payment = new PayPal.Api.Payments.Payment();
payment.intent = "sale";
payment.payer = payer;
payment.transactions = transactions;
PayPal.Api.Payments.Payment createdPayment = payment.Create(accessToken);
return Json(new JsonWrapper { Data = createdPayment });
}
當步進通過，就行了
PayPal.Api.Payments.Payment createdPayment = payment.Create(accessToken);
確切錯誤的錯誤occors（作爲JSON對象）：
"ClassName":"PayPal.Exception.PayPalException","Message":"Exception in HttpConnection Execute: Invalid HTTP response The remote server returned an error: (503) Server Unavailable.","Data":null,"InnerException":{"ClassName":"PayPal.Exception.ConnectionException","Message":"Invalid HTTP response The remote server returned an error: (503) Server Unavailable.","Data":null,"InnerException":null,"HelpURL":null,"StackTraceString":" at PayPal.HttpConnection.Execute(String payLoad, HttpWebRequest httpRequest)","RemoteStackTraceString":null,"RemoteStackIndex":0,"ExceptionMethod":"8\nExecute\nPayPalCoreSDK, Version=1.4.1.0, Culture=neutral, PublicKeyToken=null\nPayPal.HttpConnection\nSystem.String Execute(System.String, System.Net.HttpWebRequest)","HResult":-2146233088,"Source":"PayPalCoreSDK","WatsonBuckets":null},"HelpURL":null,"StackTraceString":" at PayPal.PayPalResource.ConfigureAndExecute[T](Dictionary`2 config, IAPICallPreHandler apiCallPreHandler, HttpMethod httpMethod, String resourcePath)\r\n at PayPal.PayPalResource.ConfigureAndExecute[T](APIContext apiContext, HttpMethod httpMethod, String resource, String payload)\r\n at PayPal.Api.Payments.Payment.Create(APIContext apiContext)\r\n at PayPal.Api.Payments.Payment.Create(String accessToken)\r\n at Scout.Controllers.PaymentController.RequestPermissions() in e:\\Scout\\Scout\\Controllers\\PaymentController.cs:line 1105","RemoteStackTraceString":null,"RemoteStackIndex":0,"ExceptionMethod":"8\nConfigureAndExecute\nPayPalCoreSDK, Version=1.4.1.0, Culture=neutral, PublicKeyToken=null\nPayPal.PayPalResource\nT ConfigureAndExecute[T](System.Collections.Generic.Dictionary`2[System.String,System.String], PayPal.IAPICallPreHandler, PayPal.HttpMethod, System.String)","HResult":-2146233088,"Source":"PayPalCoreSDK","WatsonBuckets":null
的web.config （api鍵在這裏被截斷）：
...
<configuration>
<configSections>
<section name="paypal" type="PayPal.Manager.SDKConfigHandler, PayPalCoreSDK" />
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
...
</configSections>
...
<paypal>
<settings>
<add name="endpoint" value="https://api.sandbox.paypal.com"/>
<add name="ClientID" value="AbayoRB3Eq6YxM6"/>
<add name="ClientSecret" value="EDWNfxDxnGZ3hWZW"/>
<add name="connectionTimeout" value="360000"/>
<!-- The number of times a request must be retried if the API endpoint is unresponsive -->
<add name="requestRetries" value="3"/>
</settings>
</paypal>
...
<log4net>
<appender name="FileAppender" type="log4net.Appender.FileAppender">
<file value="ScoutPaypalLog.log" />
<appendToFile value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] %message%newline" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="FileAppender" />
</root>
</log4net>
正如你所看到的，我已經配置了log4net，它正在記錄我使用的另一個.dll（對於RavenDB）生成的數據，但沒有貝寶做出的條目。
謝謝！