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    <p>So I found some issues with the code:</p> <ul> <li><p>You have chosen to use <strong><code>SharedKeyLite</code></strong> however the format you're using to create the <code>stringToSign</code> in your code is for <strong><code>SharedKey</code></strong>. If you want to use <code>SharedKeyLite</code>, please try to create <code>stringToSign</code> using something like below:</p> <pre><code> stringToSign = String.Format("{0}\n{1}", time, canonicalizedResource); </code></pre></li> </ul> <p>For more details, please see here: <a href="http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx</a></p> <ul> <li><p>I found an issue with the way you're creating <code>StringContent</code>. For some reason, if I use your code, I always get 403 error. Try this instead:</p> <pre><code> var stringContent = new StringContent(body); stringContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/atom+xml"); HttpResponseMessage messageResult = await request.PostAsync(uri, stringContent); </code></pre></li> </ul> <p>Try this code instead. It makes use of SharedKey:</p> <pre><code>using System; using System.Collections.Generic; using System.Globalization; using System.Linq; using System.Net.Http; using System.Security.Cryptography; using System.Text; using System.Threading.Tasks; namespace SOPostToAzureTable { static class Utilities { internal static string Account = "account name"; internal static string Key = "account key"; } class Program { static void Main(string[] args) { var task = Task.Factory.StartNew(() =&gt; InsertEntityAsync("SOTest")); Task[] tasks = new Task[1]; tasks[0] = task; Task.WaitAll(tasks); Console.WriteLine("Press any key to continue"); Console.ReadLine(); } public static async Task&lt;string&gt; InsertEntityAsync(string tableName) { string uri = @"https://" + Utilities.Account + ".table.core.windows.net/" + tableName; return await UploadEntityAsync(tableName, uri); } public static async Task&lt;string&gt; UploadEntityAsync(string urlPath, string uri) { string body = @"&lt;?xml version=""1.0"" encoding=""utf-8"" standalone=""yes""?&gt; &lt;entry xmlns:d=""http://schemas.microsoft.com/ado/2007/08/dataservices"" xmlns:m=""http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"" xmlns=""http://www.w3.org/2005/Atom""&gt; &lt;title /&gt; &lt;updated&gt;2013-08-30T21:03:45.4991966Z&lt;/updated&gt; &lt;author&gt; &lt;name /&gt; &lt;/author&gt; &lt;id /&gt; &lt;content type=""application/xml""&gt; &lt;m:properties&gt; &lt;d:PartitionKey&gt;SOTest&lt;/d:PartitionKey&gt; &lt;d:RowKey&gt;{0}&lt;/d:RowKey&gt; &lt;d:A m:type=""Edm.String""&gt;A&lt;/d:A&gt;&lt;d:B m:type=""Edm.String""&gt;B&lt;/d:B&gt; &lt;/m:properties&gt; &lt;/content&gt; &lt;/entry&gt;"; body = string.Format(body, Guid.NewGuid()); HttpClient request = new HttpClient(); string formatedTime = DateTime.UtcNow.ToString("R"); request.DefaultRequestHeaders.Add("x-ms-date", formatedTime); //Adding the Authorization header to the request string authorization = GetSignedString("POST", formatedTime, urlPath, Utilities.Account, Utilities.Key); request.DefaultRequestHeaders.Add("Authorization", authorization); request.DefaultRequestHeaders.TryAddWithoutValidation("Content-Length", body.Length.ToString()); var stringContent = new StringContent(body); stringContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/atom+xml"); HttpResponseMessage messageResult = await request.PostAsync(uri, stringContent); return messageResult.ToString(); } public static string GetSignedString(string httpMethod, string time, string urlPath, string account, string key) { String contentMD5 = String.Empty; String contentType = "application/atom+xml"; String canonicalizedResource = String.Format("/{0}/{1}", account, urlPath); //stringToSign format for SharedKey String stringToSign = String.Format( "{0}\n{1}\n{2}\n{3}\n{4}", httpMethod, contentMD5, contentType, time, canonicalizedResource); //stringToSign format for SharedKeyLite //stringToSign = String.Format("{0}\n{1}", time, canonicalizedResource); string signedKey = SignThis(stringToSign, key, account); return signedKey; } private static String SignThis(String canonicalizedString, string Key, string Account) { String signature = string.Empty; byte[] unicodeKey = Convert.FromBase64String(Key); using (HMACSHA256 hmacSha256 = new HMACSHA256(unicodeKey)) { Byte[] dataToHmac = System.Text.Encoding.UTF8.GetBytes(canonicalizedString); signature = Convert.ToBase64String(hmacSha256.ComputeHash(dataToHmac)); } String authorizationHeader = String.Format( CultureInfo.InvariantCulture, "{0} {1}:{2}", "SharedKey", Account, signature); return authorizationHeader; } } } </code></pre>
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    1. POAuthorization header in a POST request to Azure Tables
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    1. COSorry about that, i'm actually using application/atom+xml on both my request and my signature, and still get the error 403
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    2. COCan you share the complete code by updating your original post? Since you mentioned that the code above is working fine for your GET requests, I am guessing something's wrong with the way you're creating request.
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    3. COI'll work on it and let you know what happened, thanks for helping!
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