QuickBooks Authentication error when getting basic company information - quickbooks

Question

I'm writing a simple desktop application to get information from QuickBooks(developer account using demo account(UK) data) and in this regard I've been able to go past the OAuth flow. However, I've not been able to get the basic company information
The below is a capture of the Fiddler request and response:
GET https://quickbooks.api.intuit.com/v3/company/123145829830639/companyInfo/123145829830639 HTTP/1.1
Authorization: oauth_token="****", oauth_nonce="z4x0a196", oauth_consumer_key="****", oauth_signature_method="HMAC-SHA1", oauth_timestamp="1499283607", oauth_version="1.0", oauth_signature="EGw6Ty%2BKFAawrH1%2FSxQuFwaMcEo%3D"
Content-Type: application/json
Host: quickbooks.api.intuit.com
The generation of the header is similar to https://developer.intuit.com/v2/apiexplorer?apiname=V3QBO#?id=CompanyInfo but I end up getting the following response(Fiddler partial response) based on the request
intuit_tid: gw-c4e19f89-df78-42a5-ae7e-216187421143
Set-Cookie: JSESSIONID=21BF1FFEE48B39538E82485FD25C4280.c51-pprdsbxas901; Path=/; Secure; HttpOnly
QBO-Version: 1706.912
ErrorCode: 100
ErrorCause: AuthenticationErrorGeneral: SRV-110-Authentication Failure , statusCode: 401
Message: General Authentication Error
The code to access company information is as below:
string companyInfo = String.Format("company/{0}/companyInfo/{0}", authenticator.OAuthProfile.realmId);
string ciUrl = BASE_URL + companyInfo; //https://quickbooks.api.intuit.com/v3/
var sb = new System.Text.StringBuilder();
sb.AppendFormat("oauth_token=\"{0}\", oauth_nonce=\"{1}\", oauth_consumer_key=\"{2}\", oauth_signature_method=\"HMAC-SHA1\", oauth_timestamp=\"{3}\", oauth_version=\"1.0\", oauth_signature=\"{4}\"",
Manager.UrlEncode(_token),
Manager.UrlEncode(_nonce),
Manager.UrlEncode(_consumer_key),
Manager.UrlEncode(_timestamp),
Manager.UrlEncode(_signature));
var authorisationHeader = sb.ToString().TrimEnd(' ').TrimEnd(',');
// Request Company Information
var request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(ciUrl);
request.Headers.Add("Authorization", authorisationHeader);
request.Method = "GET";
request.ContentType = "application/json";
using (var response = (System.Net.HttpWebResponse)request.GetResponse())
{
// get 401
}
Used sandbox URL and added minorversion to the base URL
I attempted setting BASE_URL set to the sandbox url(https://sandbox-quickbooks.api.intuit.com/v3) and also set minorversion to be 4.
Any help is much appreciated.

Answer 1

Hopefully this helps, but here is a Java snippet using their SDK that works for me:
OAuthAuthorizer oauth = new OAuthAuthorizer(System.env.QB_OAUTH_CONSUMER_KEY, System.env.QB_OAUTH_CONSUMER_SECRET,
vendor.intuitOAuthAccessToken, vendor.intuitOAuthAccessSecret);
UUID trackingID = UUID.randomUUID()
log.info("About to init Context companyID=" + vendor.realmId + ", app_token=" + System.env.QB_APP_TOKEN + ", uuid=" + trackingID.toString())
Context context = new Context(oauth, System.env.QB_APP_TOKEN, ServiceType.QBO, vendor.realmId)
context.setMinorVersion("4")
context.setTrackingID(trackingID)
log.info("About to set BaseURL")
Config.setProperty(Config.BASE_URL_QBO, System.env.QB_BASE_URL + "/v3/company");
log.info("About to init DataService")
// get all customers
log.info("About to executeQuery")
DataService service = new DataService(context)
QueryResult queryResult = service.executeQuery("select * from customer");
In my case, QB_BASE_URL=https://sandbox-quickbooks.api.intuit.com
*NOTE there isn't a trailing slash
vendor.intuitOAuthAccessToken and vendor.intuitOAuthAccessSecret are the values you get back after the oauth flow