Fixed empty POST requests

and added support for parenthesis in filters.

UCloud.Operations/Packages/com.uralstech.ucloud.operations/Runtime/Scripts/Data/Operations/List/Filters/OperationFilterConditions.cs

@@ -7,6 +7,16 @@ namespace Uralstech.UCloud.Operations
     /// </summary>
     public class OperationFilterConditions
     {
+        /// <summary>
+        /// Is this object also the start of a parenthetical condition? If <see langword="true"/>, then a ( symbol is added to the start of this conditino.
+        /// </summary>
+        public bool IsStartOfParentheticalCondition = false;
+
+        /// <summary>
+        /// Is this object also the end of a parenthetical condition? If <see langword="true"/>, then a ) symbol is added to the end of this conditino.
+        /// </summary>
+        public bool IsEndOfParentheticalCondition = false;
+
         /// <summary>
         /// The Left-Hand-Side operand.
         /// </summary>
@@ -25,9 +35,11 @@ public class OperationFilterConditions
         /// <inheritdoc/>
         public override string ToString()
         {
-            return Operator == OperationFilterOperator.None
+            string expression = Operator == OperationFilterOperator.None
                 ? OperandA.ToString()
                 : $"{OperandA}{JsonConvert.SerializeObject(Operator)[1..^1]}{OperandB}";
+
+            return (IsStartOfParentheticalCondition ? '(' : string.Empty) + expression + (IsEndOfParentheticalCondition ? ')' : string.Empty);
         }
     }
 }

UCloud.Operations/Packages/com.uralstech.ucloud.operations/Runtime/Scripts/Data/Operations/List/OperationsListRequest.cs

@@ -1,7 +1,7 @@
 namespace Uralstech.UCloud.Operations
 {
     /// <summary>
-    /// Requests metadata for an operation. Return type is <see cref="OperationsListResponse"/> or <see cref="Generic.OperationsListResponse{TMetadata, TResponse}"/>.
+    /// Requests metadata for an operation. Return type is <see cref="OperationsListResponse"/> or <see cref="Generic.OperationsListResponse{TOperation}"/>.
     /// </summary>
     public class OperationsListRequest : IOperationsGetRequest
     {

UCloud.Operations/Packages/com.uralstech.ucloud.operations/Runtime/Scripts/Managers/OperationsManager.cs

@@ -14,13 +14,18 @@ namespace Uralstech.UCloud.Operations
     [AddComponentMenu("Uralstech/UCloud/Operations/Operations Manager")]
     public class OperationsManager : Singleton<OperationsManager>
     {
+        /// <summary>
+        /// An empty JSON object.
+        /// </summary>
+        private const string EmptyJsonObject = "{}";
+
         /// <summary>
         /// Computes a GET request on the google.longrunning API.
         /// </summary>
         /// 
         /// <typeparam name="TResponse">
         /// The response type. For example, a request of type <see cref="OperationsListRequest"/> corresponds
-        /// to a response type of <see cref="OperationsListResponse"/> or <see cref="Generic.OperationsListResponse{TMetadata, TResponse}"/>.
+        /// to a response type of <see cref="OperationsListResponse"/> or <see cref="Generic.OperationsListResponse{TOperation}"/>.
         /// </typeparam>
         /// 
         /// <param name="accessToken">The OAuth Access Token to use for authentication.</param>
@@ -149,7 +154,7 @@ private TResponse ConfirmResponse<TResponse>(UnityWebRequest request)
         /// <exception cref="OperationResponseParsingException">Thrown if the response was not empty.</exception>
         private void ConfirmResponse(UnityWebRequest request)
         {
-            if (!string.IsNullOrEmpty(request.downloadHandler?.text))
+            if (!string.IsNullOrEmpty(request.downloadHandler?.text) || request.downloadHandler.text.Trim() == EmptyJsonObject)
             {
                 Debug.LogError($"Failed to confirm successful API response:\n{request.downloadHandler?.text}");
                 throw new OperationResponseParsingException(request);

UCloud.Operations/Packages/com.uralstech.ucloud.operations/package.json

@@ -8,7 +8,7 @@
     "Cloud",
     "Integration"
   ],
-  "version": "1.1.0-preview.3",
+  "version": "1.1.0-preview.4",
   "unity": "2022.3",
   "hideInEditor": false,
   "documentationUrl": "https://uralstech.github.io/UCloud.Operations/",