问Azure Storage (Put Blob )

EN

internal static class AzureStorageAuthenticationHelper
    {
        
        internal static AuthenticationHeaderValue GetAuthorizationHeader(
           string storageAccountName, string storageAccountKey, DateTime now,
           HttpRequestMessage httpRequestMessage, string ifMatch = "", string md5 = "")
        {
            // This is the raw representation of the message signature.
            HttpMethod method = httpRequestMessage.Method;
            String MessageSignature = String.Format("{0}\n\n\n{1}\n{5}\n\n\n\n{2}\n\n\n\n{3}{4}",
                      method.ToString(),
                      (method == HttpMethod.Get || method == HttpMethod.Head) ? String.Empty
                        : httpRequestMessage.Content.Headers.ContentLength.ToString(),
                      ifMatch,
                      GetCanonicalizedHeaders(httpRequestMessage),
                      GetCanonicalizedResource(httpRequestMessage.RequestUri, storageAccountName),
                      md5);

            // Now turn it into a byte array.
            byte[] SignatureBytes = Encoding.UTF8.GetBytes(MessageSignature);

            // Create the HMACSHA256 version of the storage key.
            HMACSHA256 SHA256 = new HMACSHA256(Convert.FromBase64String(storageAccountKey));

            // Compute the hash of the SignatureBytes and convert it to a base64 string.
            string signature = Convert.ToBase64String(SHA256.ComputeHash(SignatureBytes));

            // This is the actual header that will be added to the list of request headers.
            // You can stop the code here and look at the value of 'authHV' before it is returned.
            AuthenticationHeaderValue authHV = new AuthenticationHeaderValue("SharedKey",
                storageAccountName + ":" + Convert.ToBase64String(SHA256.ComputeHash(SignatureBytes)));
            return authHV;
        }

        
        private static string GetCanonicalizedHeaders(HttpRequestMessage httpRequestMessage)
        {
            var headers = from kvp in httpRequestMessage.Headers
                          where kvp.Key.StartsWith("x-ms-", StringComparison.OrdinalIgnoreCase)
                          orderby kvp.Key
                          select new { Key = kvp.Key.ToLowerInvariant(), kvp.Value };

            StringBuilder sb = new StringBuilder();

            // Create the string in the right format; this is what makes the headers "canonicalized" --
            //   it means put in a standard format. http://en.wikipedia.org/wiki/Canonicalization
            foreach (var kvp in headers)
            {
                StringBuilder headerBuilder = new StringBuilder(kvp.Key);
                char separator = ':';

                // Get the value for each header, strip out \r\n if found, then append it with the key.
                foreach (string headerValues in kvp.Value)
                {
                    string trimmedValue = headerValues.TrimStart().Replace("\r\n", String.Empty);
                    headerBuilder.Append(separator).Append(trimmedValue);

                    // Set this to a comma; this will only be used 
                    //   if there are multiple values for one of the headers.
                    separator = ',';
                }
                sb.Append(headerBuilder.ToString()).Append("\n");
            }
            return sb.ToString();
        }

      
        private static string GetCanonicalizedResource(Uri address, string storageAccountName)
        {
            // The absolute path is "/" because for we're getting a list of containers.
            StringBuilder sb = new StringBuilder("/").Append(storageAccountName).Append(address.AbsolutePath);

            // Address.Query is the resource, such as "?comp=list".
            // This ends up with a NameValueCollection with 1 entry having key=comp, value=list.
            // It will have more entries if you have more query parameters.
            NameValueCollection values = HttpUtility.ParseQueryString(address.Query);

            foreach (var item in values.AllKeys.OrderBy(k => k))
            {
                sb.Append('\n').Append(item).Append(':').Append(values[item]);
            }

            return sb.ToString().ToLower();

        }
    }

                FileInfo fileInfo = new FileInfo("D:\\sampleData\\readsample.jpg");
                string blobName = fileInfo.Name;
                string contentType = MimeMapping.GetMimeMapping(blobName);
                DateTime now = DateTime.UtcNow;
                string blobURI = string.Format("https://{0}.blob.core.windows.net/{1}/{2}", StorageAccountName, "test", blobName);
                using (var httpRequestMessage = new HttpRequestMessage(HttpMethod.Put, blobURI))
                {
                    httpRequestMessage.Headers.Add("x-ms-date", now.ToString("R", CultureInfo.InvariantCulture));
                    httpRequestMessage.Headers.Add("x-ms-version", "2020-06-12");
                    httpRequestMessage.Headers.Add("x-ms-blob-type", "BlockBlob");

                    httpRequestMessage.Headers.Add("x-ms-blob-content-type", contentType);
                    httpRequestMessage.Content = new StreamContent(fileInfo.OpenRead());
                    httpRequestMessage.Headers.Authorization = AzureStorageAuthenticationHelper.GetAuthorizationHeader(
                StorageAccountName, StorageAccountKey, now, httpRequestMessage);

                    // Send the request.
                    using (HttpResponseMessage httpResponseMessage = await new HttpClient().SendAsync(httpRequestMessage))
                    {
                        // If successful (status code = 200), 
                        //   parse the XML response for the container names.
                        if (httpResponseMessage.StatusCode == HttpStatusCode.Created)
                        {
                          
                        Console.WriteLine("OK");
                         

                        }
                    }
                }