ShopSite API Help

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ShopSite API Help

Postby mark.qbsdkprogrammer » Thu Mar 17, 2022 5:14 am

I am working on an integration with ShopSite.com. The sample code given is in PHP code
I don't know PHP, but I have tried and successfully generated the access_token (Step 1) using C#.Net
I am trying to download the orders and got this error

{ "error": "access_denied", "error_description": "client and server signatures do not match" }

Below is my code

string DownloadOrders()
{
Random random = new Random();
string secretKey = "D054-134B-9959-3FB2";
string token = "MTY0NzUwMTIyOHx3b29kcGFydHN8NnxGaXNoYm93bHw3NzF8";
string downloadUrl = "https://www.example.com/cgi-woodparts/sb/db_xml.cgi";
string port = "443";
string urlPath = "/cgi-woodparts/sb/db_xml.cgi";
string nonce = random.Next(123400, 9999999).ToString();
Int32 unixTimestamp = (int)DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1)).TotalSeconds;

StringBuilder signatureBuilder = new StringBuilder();
signatureBuilder.Append(token).Append(Environment.NewLine);
signatureBuilder.Append(unixTimestamp).Append(Environment.NewLine);
signatureBuilder.Append(nonce).Append(Environment.NewLine);
signatureBuilder.Append(Environment.NewLine);
signatureBuilder.Append("POST").Append(Environment.NewLine);
Uri myUri = new Uri(downloadUrl);
string domain = myUri.Host;
signatureBuilder.Append(domain).Append(Environment.NewLine);
signatureBuilder.Append(port).Append(Environment.NewLine);
signatureBuilder.Append(urlPath).Append(Environment.NewLine);
signatureBuilder.Append("clientApp=1").Append(Environment.NewLine);
signatureBuilder.Append("dbname=orders").Append(Environment.NewLine);
signatureBuilder.Append("startdate=11%2F01%2F2021").Append(Environment.NewLine);
signatureBuilder.Append("version=14.0").Append(Environment.NewLine);

string sSign = signatureBuilder.ToString();
string signature = GetHMAC(sSign, secretKey);

string orderUrl = downloadUrl;
var client = new RestClient(orderUrl);
client.Timeout = -1;
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
request.AddParameter("token", token);
request.AddParameter("timestamp", unixTimestamp);
request.AddParameter("nonce", nonce);
request.AddParameter("signature", signature);

request.AddParameter("clientApp", "1");
request.AddParameter("dbname", "orders");
request.AddParameter("startdate", "11%2F01%2F2020");
request.AddParameter("version", "14.0");

var response = client.Execute(request);
return response.Content;
}

Please let me know what I am doing wrong. If someone can give me a code example of "signature" part in C# code, that will also help me.

Thanks in advance.
Mark
mark.qbsdkprogrammer
 
Posts: 2
Joined: Thu Mar 17, 2022 5:10 am

Re: ShopSite API Help

Postby cyoung » Tue Mar 22, 2022 2:28 pm

You can compare the values from a successful PHP request with what your C# is making. The main errors usually happen in the HMAC. The HMAC should generate a list of numeric bytes which are then Base64 encoded. Most newer languages will normally return a Base16 encoded string for the HMAC. You can investigate the GetHMAC function to make sure the HMAC is Base64 encoded. It should also use SHA-1.

Other than that you can compare the values your code makes with specific values with the ones that are generated by a successful PHP request.


Are you familiar with Postman? (API(application programming interface) development tool which helps to build, test and modify APIs.)
cyoung
 
Posts: 113
Joined: Wed Nov 09, 2016 11:01 am

Re: ShopSite API Help

Postby mark.qbsdkprogrammer » Tue Mar 22, 2022 8:16 pm

This is resolved. The startDate parameter was causing the issue.
My client has agreed to use the Start order number parameter. Now the program is working just fine.

Thanks.
mark.qbsdkprogrammer
 
Posts: 2
Joined: Thu Mar 17, 2022 5:10 am


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