Attachments2 using HttpClient and C#

[Jorgedotnet]

Hi. Based on 

• Postman tool OK
• .NET B1SLayer OK
• .NET System.Net.Http.HttpClient Failed

Assuming that the login has been previously performed with the SAPclient object. The Attachments2 method doesn't work with HttpClient in C#. Please see:

var res = "";
var content = new MultipartContent();
var outputFile = new StreamContent(new MemoryStream(File.ReadAllBytes("C:\\Users\\Jorge\\Postman\\files\\helloworld.txt)));

outputFile.Headers.Add("Content-Disposition", $"form-data; name=\"files\"; filename=\"helloworld.txt\"");
outputFile.Headers.Add("Content-Type", "application/octet-stream");
content.Add(outputFile);
var boundary = content.Headers.ContentType!.Parameters.First(o => o.Name.Equals("boundary", StringComparison.OrdinalIgnoreCase));
boundary.Value = boundary.Value!.Replace("\"", string.Empty);

var response = await SAPclient.PostAsync("https://mycompany.com:50000/b1s/v1/Attachments2", content);
if (response.IsSuccessStatusCode == true && response.StatusCode == HttpStatusCode.Created)
{
Attachments2Response? resA = await response.Content.ReadFromJsonAsync<Attachments2Response>();
res = resA!.AbsoluteEntry.ToString(); 
}

The Response: StatusCode: 400, ReasonPhrase: 'Bad Request', Version: 1.1, Content: System.Net.Http.HttpConnectionResponseContent, Headers:
{
Date: Thu, 12 Sep 2024 20:46:02 GMT
Server: Apache/2.4.54 (Unix)
DataServiceVersion: 3.0
Vary: Accept-Encoding
Connection: close
Transfer-Encoding: chunked
Content-Type: application/json;charset=utf-8
}}

Why and how to fix it?

Thanks.

Jorge

[ANKIT_CHAUHAN]

Hi Jorgedotnet,

Can you use Fiddler tool to get the request (including all headers) which is being sent to Service Layer to process?

In the past, we have observed that Expect: 100-continue header is contained in the request which is not supported by Service Layer.

If it is the case, please add httpClient.DefaultRequestHeaders.ExpectContinue = false; in the code and check the issue again.

Kind regards,

ANKIT CHAUHAN

SAP Business One Support

[Jorgedotnet]

Hi ANKIT. The same error with .NET httpClient. Based on Fiddler and Service Layer: POST /b1s/v1/Attachments2 HTTP/1.1 Host: mycompany.com:50000 Cookie: B1SESSION=5412064e-71c4-11ef-8000-12c57281de91; ROUTEID=.node4 Accept-Encoding: gzip, deflate Content-Type: multipart/form-data; boundary=c86cf448-3c24-4769-bcb5-fb30989a83d7 Content-Length: 214. Sincerely Jorge.

[Jorgedotnet]

Hi a suggestion: Can you please reproduce this code on your side. Anything please feel free to contact me. Thanks. Jorge