ブラウザをリダイレクトせずに、顧客のためにペイパルでエクスプレス チェックアウト プロセスを実行したいと考えています。私は次のようなコードを書きました
string sAPIUser = apiuser;
string sAPIPassword = password;
string sAPISignature = "signature";
string sAPIEndpoint = "https://api-3t.sandbox.paypal.com/nvp";
string sAppID = "APP-80W284485P519543T";
StringBuilder sRequest = new StringBuilder();
ASCIIEncoding encoding = new ASCIIEncoding();
string postData = ("&METHOD=SetExpressCheckout");
postData += ("&VERSION=63.0");
postData += ("&PAYMENTREQUEST_0_AMT=10.00");
postData += ("&PAYMENTREQUEST_0_CURRENCYCODE=USD");
postData += ("&PAYMENTREQUEST_0_PAYMENTACTION=Sale");
postData += ("CANCELURL=http://www.google.com");
postData += ("RETURNURL=http://www.google.com");
byte[] data = encoding.GetBytes(postData);
// Web リクエストを準備します...
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(sAPIEndpoint);
myRequest.Method = "POST";
myRequest.Headers.Add("X-PAYPAL-SECURITY-USERID", sAPIUser);
myRequest.Headers.Add("X-PAYPAL-SECURITY-PASSWORD", sAPIPassword);
myRequest.Headers.Add("X-PAYPAL-SECURITY-SIGNATURE", sAPISignature);
myRequest.Headers.Add("X-PAYPAL-SERVICE-VERSION", "1.3.0");
myRequest.Headers.Add("X-PAYPAL-REQUEST-DATA-FORMAT", "NV");
myRequest.Headers.Add("X-PAYPAL-RESPONSE-DATA-FORMAT", "NV");
myRequest.Headers.Add("X-PAYPAL-APPLICATION-ID", sAppID);
myRequest.ContentType = "application/x-www-form-urlencoded";
myRequest.ContentLength = data.Length;
// Send the request, read the response
Stream newStream = myRequest.GetRequestStream();
newStream.Write(data, 0, data.Length);
newStream.Close();
HttpWebResponse response = (HttpWebResponse)myRequest.GetResponse();
Stream responseStream = response.GetResponseStream();
Encoding encoding2 = Encoding.GetEncoding("utf-8");
StreamReader reader = new StreamReader(responseStream, encoding2);
string theResponse = reader.ReadToEnd();
theResponse = HttpUtility.HtmlDecode(theResponse);
しかし、変数に失敗メッセージが表示されtheResponse
ます。私がやっているエラー。エラーは次のようになります
TIMESTAMP=2013%2d03%2d05T05%3a55%3a38Z&CORRELATIONID=5c10035aca937&ACK=Failure&VERSION=63%2e0&BUILD=5331358&L_ERRORCODE0=10002&L_SHORTMESSAGE0=Authentication%2fAuthorization%20Failed&L_LONGMESSAGE0=You%20do%20not%20have%20permissions%20to%20make%20this%20API%20call&L_SEVERITYCODE0=Error
どうすればこれを修正できますか。