Add write support to GetFileStreamAsync

Author: ejsmith

src/Foundatio.Storage.SshNet/Storage/SshNetFileStorage.cs

@@ -52,14 +52,24 @@ public async Task<Stream> GetFileStreamAsync(string path, StreamMode streamMode,
         if (String.IsNullOrEmpty(path))
             throw new ArgumentNullException(nameof(path));
 
-        if (streamMode is StreamMode.Write)
-            throw new NotSupportedException($"Stream mode {streamMode} is not supported.");
-
         EnsureClientConnected();
 
         string normalizedPath = NormalizePath(path);
         _logger.LogTrace("Getting file stream for {Path}", normalizedPath);
 
+        if (streamMode is StreamMode.Write)
+        {
+            try
+            {
+                return await _client.OpenAsync(normalizedPath, FileMode.Create, FileAccess.Write, cancellationToken).AnyContext();
+            }
+            catch (SftpPathNotFoundException ex)
+            {
+                _logger.LogError(ex, "Unable to get file stream for {Path}: File Not Found", normalizedPath);
+                return null;
+            }
+        }
+
         try
         {
             return await _client.OpenAsync(normalizedPath, FileMode.Open, FileAccess.Read, cancellationToken).AnyContext();

tests/Foundatio.Storage.SshNet.Tests/Storage/SshNetStorageTests.cs

@@ -136,7 +136,7 @@ public override Task WillRespectStreamOffsetAsync()
         return base.WillRespectStreamOffsetAsync();
     }
 
-    [Fact(Skip = "Write Stream is not yet supported")]
+    [Fact]
     public override Task WillWriteStreamContentAsync()
     {
         return base.WillWriteStreamContentAsync();