Good day!

I'm developing an application with Embarcadero Delphi, from this application using the component TSslHttpCli package from Overbyte ICS and send a request for creating a new bill. 

Send in the json string before that checked me in Postman, and successfully created a new bill. When i send this json string using TSslHttpCli the bill also builds successfully, but the server returns an error 405 "Method not allowed". In the web interface, I see that the bill created. Why error is returned? 

Maybe I need to install some additional tuning parameters of the http header? My code:

2. //encode national symbol to \uxxx
3. function json_encode(str: String): String;
4. var
5.   i: Integer;
6. begin
7.   Result := '';
8.   for i := 1 to Length(str) do begin
9.     if Ord(WideString(str[i])[1]) > 127 then begin
10.       Result := Result + '\u' + Format('%.4x', [Ord(WideString(str[i])[1])]);
11.     end
12.     else begin
13.       Result := Result + str[i];
14.     end;
15.   end;
16. end;
18. procedure BeforeHeaderSendPostEvent(Sender: TObject; const Method: String; Headers: TStrings);
19. begin
20.    Headers.Add('Authorization: Zoho-authtoken ' + FAuthToken);
21.    Headers.Add('Content-type: application/x-www-form-urlencoded');
22. end;
23. 
    
24. SslHttpCli := TSslHttpCli.Create(nil);
25.   SslHttpCli.OnBeforeHeaderSend := BeforeHeaderSendPostEvent;
26.   try
27.     SslHttpCli.Timeout := 12 * 1000;
28.     SslHttpCli.MultiThreaded := true;
29.      SslHttpCli.RcvdStream := TMemoryStream.Create;
30.     SslHttpCli.NoCache := true;
31.     SslHttpCli.ServerAuth := httpAuthNone;
32.     SslHttpCli.SslContext := TSslContext.Create(nil);
33.     SslHttpCli.url := TIdURI.URLEncode(url);
34.     SslHttpCli.SendStream := TStringStream.Create('JSONString='+json_encode(params));
35.     try
36.       SslHttpCli.Post;
37.     except
38.       on E: Exception do                  
39.              showmessage(e.message); //show returned "Method not allowed"
40.     end;
42. if SslHttpCli.StatusCode = 200 then
43.     begin
44.             ;// some code
45.       end
46.       else
47.       begin
48.             showmessage('error code '+inttostr(SslHttpCli.StatusCode));
49.       end;

JSON string sample:

1. '{"vendor_id":"864114000000066015",
2. "bill_number":"testbill",
3. "date":"2017-09-12",
4. "due_date":"2017-09-19",
5. "payment_terms":"0",
6. "exchange_rate":"0",
7. "is_item_level_tax_calc":"false",
8. "line_items":[
9. {"name":"Test items1",
10. "description":"Test items10 description",
11. "account_id":"864114000000000370",
12. "bcy_rate":"0",
13. "rate":"800",
14. "quantity":"5",
15. "item_total":"0",
16. "item_order":"0",
17. "is_billable":"false"},
18. {"name":"Test items2",
19. "description":"Test items20 description",
20. "account_id":"864114000000000370",
21. "bcy_rate":"0",
22. "rate":"16",
23. "quantity":"250",
24. "item_total":"0",
25. "item_order":"0",
26. "is_billable":"false"}],
27. "taxes":[],
28. "notes":"test notes"}'