Question Re: Attachments2 using HttpClient and C# in Technology Q&A

Attachments2 using HttpClient and C#

Jorgedotnet — Thu, 12 Sep 2024 20:58:40 GMT

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

Re: Attachments2 using HttpClient and C#

ANKIT_CHAUHAN — Fri, 13 Sep 2024 07:11:49 GMT

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

Re: Attachments2 using HttpClient and C#

Jorgedotnet — Fri, 13 Sep 2024 11:51:29 GMT

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.

Re: Attachments2 using HttpClient and C#

Jorgedotnet — Fri, 13 Sep 2024 11:58:59 GMT

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