Consuming WooCommerce REST API from C#

woocommerce-csharp-client

//C# port of the https://github.com/kloon/WooCommerce-REST-API-Client-Library
//Including handling of woocommerce insisting on uppercase UrlEncoded entities
public class WoocommerceApiClient
    {
        private static byte[] HashHMAC(byte[] key, byte[] message)
        {
            var hash = new HMACSHA256(key);
            return hash.ComputeHash(message);
        }

        private string Hash(string input)
        {
            using (SHA1Managed sha1 = new SHA1Managed())
            {
                var hash = sha1.ComputeHash(Encoding.UTF8.GetBytes(input));
                var sb = new StringBuilder(hash.Length*2);

                foreach (byte b in hash)
                {
                    // can be "x2" if you want lowercase
                    sb.Append(b.ToString("X2"));
                }

                return sb.ToString();
            }
        }

        public const string API_ENDPOINT = "wc-api/v1/";
        public string ApiUrl { get; set; }
        public string ConsumerSecret { get; set; }
        public string ConsumerKey { get; set; }
        public bool IsSsl { get; set; }

        public WoocommerceApiClient(string consumerKey, string consumerSecret, string storeUrl, bool isSsl = false)
        {
            if (string.IsNullOrEmpty(consumerKey) || string.IsNullOrEmpty(consumerSecret) ||
                string.IsNullOrEmpty(storeUrl))
            {
                throw new ArgumentException("ConsumerKey, consumerSecret and storeUrl are required");
            }
            this.ConsumerKey = consumerKey;
            this.ConsumerSecret = consumerSecret;
            this.ApiUrl = storeUrl.TrimEnd('/') + "/" + API_ENDPOINT;
            this.IsSsl = isSsl;
        }

        public string GetAllProducts()
        {
            return MakeApiCall("products", new Dictionary<string, string>() {{"filter[limit]", "2000"}});
        }
        public string GetProducts()
        {
            return MakeApiCall("products");
        }

        private string MakeApiCall(string endpoint, Dictionary<string, string> parameters = null, string method = "GET")
        {
            if (parameters == null)
            {
                parameters = new Dictionary<string, string>();
            }
            parameters["oauth_consumer_key"] = this.ConsumerKey;
            parameters["oauth_timestamp"] =
                DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1, 0, 0, 0)).TotalSeconds.ToString();
            parameters["oauth_timestamp"] = parameters["oauth_timestamp"].Substring(0,
                parameters["oauth_timestamp"].IndexOf("."));
            parameters["oauth_nonce"] = Hash(parameters["oauth_timestamp"]);
            parameters["oauth_signature_method"] = "HMAC-SHA256";
            parameters["oauth_signature"] = GenerateSignature(parameters, method, endpoint);
            WebClient wc = new WebClient();
            StringBuilder sb = new StringBuilder();
            foreach (var pair in parameters)
            {
                sb.AppendFormat("&{0}={1}", HttpUtility.UrlEncode(pair.Key), HttpUtility.UrlEncode(pair.Value));
            }
            var url = this.ApiUrl + endpoint + "?" + sb.ToString().Substring(1).Replace("%5b","%5B").Replace("%5d","%5D");
            var result = wc.DownloadString(url);
            return result;
        }

        private string GenerateSignature(Dictionary<string, string> parameters, string method, string endpoint)
        {
            var baserequesturi = Regex.Replace(HttpUtility.UrlEncode(this.ApiUrl + endpoint), "(%[0-9a-f][0-9a-f])", c => c.Value.ToUpper());
            var normalized = NormalizeParameters(parameters);

            var signingstring = string.Format("{0}&{1}&{2}", method, baserequesturi,
                string.Join("%26", normalized.OrderBy(x => x.Key).ToList().ConvertAll(x => x.Key + "%3D" + x.Value)));
            var signature = 
                Convert.ToBase64String(HashHMAC(Encoding.UTF8.GetBytes(this.ConsumerSecret),
                    Encoding.UTF8.GetBytes(signingstring)));
            Console.WriteLine(signature);
            return signature;
        }

        private Dictionary<string, string> NormalizeParameters(Dictionary<string, string> parameters)
        {
            var result = new Dictionary<string, string>();
            foreach (var pair in parameters)
            {
                var key = HttpUtility.UrlEncode(HttpUtility.UrlDecode(pair.Key));
                key = Regex.Replace(key, "(%[0-9a-f][0-9a-f])", c => c.Value.ToUpper()).Replace("%", "%25");
                var value = HttpUtility.UrlEncode(HttpUtility.UrlDecode(pair.Value));
                value = Regex.Replace(value, "(%[0-9a-f][0-9a-f])", c => c.Value.ToUpper()).Replace("%", "%25");
                result.Add(key, value);
            }
            return result;
        }
    }

@diegoaraujolima
Great! Glad to hear you've fixed it.

To everyone:
Be sure that line #65 is using the proper time delimiter for your time zone. It can be a dot, but it also can be a comma character.

For anyone who want to simplify the things, just use WoocommerceSharp

To use the PUT / POST I created a new method (named for MakeApiCallPUT ()) and function equivalent to line 77

var result = wc.DownloadString (url);
I put:
var result = wc.UploadString (url, "PUT", dadosJSON);

where dadosJSON is JSON content that will be sent to update.

Full function was as follows:

 private string MakeApiCallPUT(string endpoint, string dadosJSON = null, string method = "PUT")
        {

            Dictionary<string, string> parameters = null;

            if (parameters == null)
            {
                parameters = new Dictionary<string, string>();
            }
            parameters["oauth_consumer_key"] = this.ConsumerKey;

            //parameters["oauth_timestamp"] = DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1, 0, 0, 0)).TotalSeconds.ToString();
            //parameters["oauth_timestamp"] = parameters["oauth_timestamp"].Substring(0, parameters["oauth_timestamp"].IndexOf(","));

            parameters["oauth_timestamp"] = ((DateTime.UtcNow.Ticks - new DateTime(1970, 1, 1).Ticks) / (1000 * 10000)).ToString();

            parameters["oauth_nonce"] = Hash(parameters["oauth_timestamp"]);
            parameters["oauth_signature_method"] = "HMAC-SHA256";
            parameters["oauth_signature"] = GenerateSignature(parameters, method, endpoint);
            WebClient wc = new WebClient();
            StringBuilder sb = new StringBuilder();

            foreach (var pair in parameters)
            {
                sb.AppendFormat("&{0}={1}", HttpUtility.UrlEncode(pair.Key), HttpUtility.UrlEncode(pair.Value));
            }
            var url = this.ApiUrl + endpoint + "?" + sb.ToString().Substring(1).Replace("%5b", "%5B").Replace("%5d", "%5D").Replace("%7b", "%7B").Replace("%7d", "%7D").Replace("%3a", "%3A").Replace("%2c", "%2C");
            //var result = wc.DownloadString(url);
            var result = wc.UploadString(url, "PUT", dadosJSON);
            return result;
        }

Hi
I have Create Product , Customer and many other item in woocommerce . Please contact me https://www.upwork.com/users/~01b266b20bfa60411d

Can any body provide a solution for PUT or POST errors....Not able to solve the same......I can Fetch the products but cannot Update a product.

@kapildesai I will help you

@shahshyam can you help?