Error while calling API 'The request was aborted: The connection was closed unexpectedly.'

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Posted on by D365_Wibes

184

HI All,

I am facing an issue while calling sending a request to API.

Below is the error message.

Microsoft.Dynamics.Ax.Xpp.ErrorException: 'The request was aborted: The connection was closed unexpectedly.'

using Newtonsoft.Json.Linq;
using System.Net;
using System.IO;

public class WTL_6DeePaymentAPIservice
{
   public static void postPaymentAPI()
   {

       str                  _profileGUID =  "3ace35c3-6443-eb11-a812-000d3a20f116";
       str                 _transactionID = "12323553434";
       str                 _amount = "25.00";
       WTL_PaymentMode     _paymentMode = "1";
       str                _accountID = "1000107754";
       WTL_TransactionCurrencyID   _currencyCode = "QAR";
       WTL_AccountName     _customerName = "Harryson Jerico";
       str                 _amountPaid = "25";
       str                 _externalID = "4520941365";
       str                 _cardHolderName = "Patrisia Allen";
       str                 _modelValue = "113cvxrdu1";
       str                 _modelKey = "sample_key";
       str                 _paymentGWtoken = "vsE0aZWzPq02376";
       str                 _comment = "order payment";
       str                 _authToken = "xrzy6ryymust";
       str                 _orderType = "MakePayment";
       str                 _id = "";
       str                 _value = "";
        str                 _contactNumber = "(555) 555-1234";

        
        System.Exception                ex;
       

        try
        {
            JObject jObject = JObject::parse(WTL_6DeeAPITokenSerice::getToken());
            WebHeaderCollection httpHeaders = new WebHeaderCollection();
            httpHeaders.Add("Authorization", "Bearer "   strFmt("%1",jObject.SelectToken("$.access_token")));
            httpHeaders.Add("requestid", "7777777");
            httpHeaders.Add("sourcenode", "ERP");
            httpHeaders.Add("requesttimestamp", "2022-09-12");

            HttpWebRequest request = System.Net.WebRequest::Create("API URL");
    
            request.Headers = httpHeaders;
            request.Method = "POST";
            request.ContentType = "application/json";

            str json = WTL_6DJSONserializer::serializeJSON(
                                                            _profileGUID,
                                                            _transactionID,
                                                            strFmt("%1",_amount),
                                                            _paymentMode,
                                                            _accountID,
                                                            _currencyCode,
                                                            _customerName,
                                                            strFmt("%1",_amountPaid),
                                                            _externalID,
                                                            _cardHolderName,
                                                            _modelValue,
                                                            _modelKey,
                                                            _paymentGWtoken,
                                                            _comment,
                                                            _authToken,
                                                            _orderType,
                                                            _id,
                                                            _value,
                                                            _contactNumber);

            using (StreamWriter streamWriter = new StreamWriter(request.GetRequestStream()))
            {
                System.Byte[] postBytes;
                System.Text.Encoding encoding = System.Text.Encoding::get_ASCII();
                postBytes = encoding.GetBytes(json);
                streamWriter.Write(postBytes); // writing JSON

                using (System.Net.HttpWebResponse response = request.GetResponse())
                {
                    StreamReader streamRead = new StreamReader(response.GetResponseStream());
                    info(streamRead.ReadToEnd());
                }
            }

        }
        catch (ex)
        {
            throw error(ex.Message);
        }
        //catch (Exception::CLRError)
        //{
        //    throw error(AifUtil::getClrErrorMessage());
        //}
    }

}

I have pasted my whole code.

And while debugging I have found that the exception is thrown at " using (StreamWriter streamWriter = new StreamWriter(request.GetRequestStream())) "

Please help me to understand this issue and fix it

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Answers (1)

D365_Wibes 184 on at

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Sorry I am getting exception at line

using (System.Net.HttpWebResponse response = request.GetResponse()

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Martin Dráb 237,880 Most Valuable Professional on at

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Please look at all details of the exception, not just the message. What is the type (e.g. WebException), is there any HTTP status code and so on?

By the way, your code assumes that json variable contains ASCII string, but is it true? Please test whether your code writes what you expect to the request.

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D365_Wibes 184 on at

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Thanks for the reply Martin,

I think it is writing the ASCII string, please let me if I am wrong

Also I have seen the exception details and its of type :

Name Value Type

? $exception {"The remote server returned an error: (400) Bad Request."} Microsoft.Dynamics.Ax.Xpp.ErrorException

Please help me to understand the root cause.

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Martin Dráb 237,880 Most Valuable Professional on at

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It seems that what you send to the web service isn't what the web service expects and is able to process.

You'll need to review what you should send and what you're actually sending.

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D365_Wibes 184 on at

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You the mean the payload I am sending after encoding is having issues?

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Martin Dráb 237,880 Most Valuable Professional on at

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Yes, most likely. Although the problem could also be in headers.

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D365_Wibes 184 on at

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Thanks Martin, let me review and come back to you...

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D365_Wibes 184 on at

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Can you just tell me one more thins please?

Is my way of encoding the payload is correct ?

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Komi Siabi 13,107 Most Valuable Professional on at

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Hi D365_Wibes,

Just like Martin said your content might be the issue. I suggest, you copy the body of your message as it is in VS, and try the request on Postman. If it fails, compare that with the working sample payload. This will help you find the culprit.

And this is me presuming me that you have done your testing with Postman from the onset before you started development.

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D365_Wibes 184 on at

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{ "order_information": { "payment": { "ext_profile_id": "4dcea503-a366-eb11-a812-000d3abb5370", "transaction_id": "12323553434", "amount": "25.00", "payment_detail": [ { "payment_mode": "1", "amount_paid": "25", "reference_external_id": "4520941365", "card_holder_name": "Patrisia Allen", "mode_detail": [ { "value": "113cvxrdu1", "key": "sample_key" } ] } ], "account_id": "1000384111", "payment_gw_token": "vsE0aZWzPq02376", "comment": "order payment", "auth_token": "xrzy6ryymust", "currency_code": "QAR" }, "customer_name": "Harryson Jerico", "order_type": "MakePayment", "dataset": { "param": [ { "id": "", "value": "" } ] }, "contact_number": "(555) 555-1234" } }

This payload is getting passed via Postman

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