Add HttpRequestException expected exception handling

src/GitHubExtension/DataManager/GitHubDataManager.cs

@@ -251,6 +251,16 @@ private async Task UpdateDataStoreAsync(DataStoreOperationParameters parameters,
             PruneObsoleteData();
             SetLastUpdatedInMetaData();
         }
+        catch (HttpRequestException httpEx)
+        {
+            // HttpRequestExceptions can happen when internet connection is
+            // down or various other network issues.
+            _log.Warning($"Http Request Exception: {httpEx.Message}");
+            tx.Rollback();
+
+            // Rethrow so clients can catch/display appropriate UX.
+            throw;
+        }
         catch (Exception ex)
         {
             _log.Error(ex, $"Failed Updating DataStore for: {parameters}");
@@ -331,6 +341,12 @@ private async Task UpdateDataForRepositoryAsync(DataStoreOperationParameters par
             PruneObsoleteData();
             SetLastUpdatedInMetaData();
         }
+        catch (HttpRequestException)
+        {
+            // Higher layer will catch and log this. Suppress logging an error for this to keep log clean.
+            tx.Rollback();
+            throw;
+        }
         catch (Exception ex)
         {
             // This is for catching any other unexpected error as well as any we throw.

src/GitHubExtension/DataManager/GitHubDataManagerUpdate.cs

@@ -25,6 +25,15 @@ public static async Task Update()
         {
             await UpdateDeveloperPullRequests();
         }
+        catch (HttpRequestException httpEx)
+        {
+            // HttpRequestExceptions can happen when internet connection is
+            // down or various other network issues unrelated to this update.
+            // This is not an error in the extension or anything we can
+            // address. Log a warning so it is understood why the update did
+            // not occur, but otherwise keep the log clean.
+            _log.Warning($"Http Request Exception: {httpEx.Message}");
+        }
         catch (Exception ex)
         {
             _log.Error(ex, "Update failed unexpectedly.");