Stream blob back to client rather than read into memory.

appveyor.yml

@@ -1,7 +1,7 @@
 os: Visual Studio 2017
 
 # Version format
-version: 1.0.2.{build}
+version: 1.0.3.{build}
 
 cache:
   - src\packages -> **\packages.config   # preserve "packages" directory in the root of build folder but will reset it if packages.config is modified
@@ -35,7 +35,7 @@ deploy:
      # MyGet Deployment for builds & releases
   - provider: NuGet
     server: https://www.myget.org/F/umbracofilesystemproviders-azure/api/v2/package
-    symbol_server: https://nuget.symbolsource.org/MyGet/umbracofilesystemproviders-azure
+    symbol_server: https://www.myget.org/F/umbracofilesystemproviders-azure/symbols/api/v2/package
     api_key:
       secure: fz0rUrt3B1HczUC1ZehwVsrFSWX9WZGDQoueDztLte9/+yQG+BBU7UrO+coE8lUf
     artifact: /.*\.nupkg/

src/UmbracoFileSystemProviders.Azure/AzureFileSystem.cs

@@ -16,6 +16,7 @@ namespace Our.Umbraco.FileSystemProviders.Azure
     using System.Linq;
     using System.Text.RegularExpressions;
     using System.Web;
+    using global::Umbraco.Core.Configuration;
     using global::Umbraco.Core.IO;
     using Microsoft.WindowsAzure.Storage;
     using Microsoft.WindowsAzure.Storage.Blob;
@@ -540,8 +541,19 @@ public DateTimeOffset GetLastModified(string path)
         /// <returns>
         /// The <see cref="string"/> representing the relative path.
         /// </returns>
+        /// <remarks>
+        /// Umbraco 7.5.15 changed the way that relative paths are used for media upload. 
+        /// This is the fixing issue where uploading file to replace creates new folder.
+        /// </remarks>
         public string GetRelativePath(string fullPathOrUrl)
         {
+            var lastSafeVersion = new Version(7, 5, 14);
+
+            if (UmbracoVersion.Current.CompareTo(lastSafeVersion) > 0)
+            {
+                return this.FixPath(fullPathOrUrl);
+            }
+
             return this.ResolveUrl(fullPathOrUrl, true);
         }
 
@@ -582,8 +594,7 @@ public Stream OpenFile(string path)
                     return null;
                 }
 
-                MemoryStream stream = new MemoryStream();
-                blockBlob.DownloadToStream(stream);
+                Stream stream = blockBlob.OpenRead();
 
                 if (stream.CanSeek)
                 {
@@ -702,6 +713,12 @@ private string FixPath(string path)
                 path = path.Substring(appVirtualPath.Length);
             }
 
+            // Strip ~  before any others
+            if (path.StartsWith("~", StringComparison.InvariantCultureIgnoreCase))
+            {
+                path = path.Substring(1);
+            }
+
             if (path.StartsWith(Delimiter))
             {
                 path = path.Substring(1);