[edk2-redfish-client][PATCH 2/4] RedfishClientPkg: Add Redfish.Settings support

["Nickle Wang" <nicklew@nvidia.com>]

BIOS feature driver cannot recognize "@Redfish.Settings",
decode it and get pending setting URI. So BIOS feature
driver can consume pending setting from correct place.

Signed-off-by: Simon Wang <simowang@nvidia.com>
Cc: Nickle Wang <nicklew@nvidia.com>
Cc: Abner Chang <abner.chang@amd.com>
Cc: Igor Kulchytskyy <igork@ami.com>
---
 .../Features/Bios/v1_0_9/Dxe/BiosDxe.c        | 65 ++++++++++++++++---
 1 file changed, 57 insertions(+), 8 deletions(-)

diff --git a/RedfishClientPkg/Features/Bios/v1_0_9/Dxe/BiosDxe.c b/RedfishClientPkg/Features/Bios/v1_0_9/Dxe/BiosDxe.c
index 15ec208d..125e4eda 100644
--- a/RedfishClientPkg/Features/Bios/v1_0_9/Dxe/BiosDxe.c
+++ b/RedfishClientPkg/Features/Bios/v1_0_9/Dxe/BiosDxe.c
@@ -2,6 +2,7 @@
   Redfish feature driver implementation - Bios
 
   (C) Copyright 2020-2022 Hewlett Packard Enterprise Development LP<BR>
+  Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -101,7 +102,13 @@ RedfishResourceConsumeResource (
   REDFISH_RESOURCE_COMMON_PRIVATE  *Private;
   EFI_STATUS                       Status;
   REDFISH_RESPONSE                 Response;
+  REDFISH_RESPONSE                 *ExpectedResponse;
+  REDFISH_RESPONSE                 RedfishSettingsResponse;
   CHAR8                            *Etag;
+  UINTN                            Index;
+  EDKII_JSON_VALUE                 JsonValue;
+  EFI_STRING                       RedfishSettingsUri;
+  CONST CHAR8                      *RedfishSettingsUriKeys[] = { "@Redfish.Settings", "SettingsObject", "@odata.id" };
 
   if ((This == NULL) || IS_EMPTY_STRING (Uri)) {
     return EFI_INVALID_PARAMETER;
@@ -119,8 +126,38 @@ RedfishResourceConsumeResource (
     return Status;
   }
 
+  ExpectedResponse   = &Response;
+  RedfishSettingsUri = NULL;
+  JsonValue          = RedfishJsonInPayload (Response.Payload);
+
+  //
+  // Seeking RedfishSettings URI link.
+  //
+  for (Index = 0; Index < sizeof (RedfishSettingsUriKeys) / sizeof (*RedfishSettingsUriKeys); Index++) {
+    if (JsonValue == NULL) {
+      break;
+    }
+
+    JsonValue = JsonObjectGetValue (JsonValueGetObject (JsonValue), RedfishSettingsUriKeys[Index]);
+  }
+
+  if (JsonValue != NULL) {
+    //
+    // Verify RedfishSettings URI link is valid to retrieve resource or not.
+    //
+    RedfishSettingsUri = JsonValueGetUnicodeString (JsonValue);
+
+    Status = GetResourceByUri (Private->RedfishService, RedfishSettingsUri, &RedfishSettingsResponse);
+    if (EFI_ERROR (Status)) {
+      DEBUG ((DEBUG_ERROR, "%a, @Redfish.Settings exists, get resource from: %s failed\n", __FUNCTION__, RedfishSettingsUri));
+    } else {
+      Uri              = RedfishSettingsUri;
+      ExpectedResponse = &RedfishSettingsResponse;
+    }
+  }
+
   Private->Uri     = Uri;
-  Private->Payload = Response.Payload;
+  Private->Payload = ExpectedResponse->Payload;
   ASSERT (Private->Payload != NULL);
 
   Private->Json = JsonDumpString (RedfishJsonInPayload (Private->Payload), EDKII_JSON_COMPACT);
@@ -130,7 +167,7 @@ RedfishResourceConsumeResource (
   // Find etag in HTTP response header
   //
   Etag   = NULL;
-  Status = GetEtagAndLocation (&Response, &Etag, NULL);
+  Status = GetEtagAndLocation (ExpectedResponse, &Etag, NULL);
   if (EFI_ERROR (Status)) {
     DEBUG ((DEBUG_ERROR, "%a, failed to get ETag from HTTP header\n", __FUNCTION__));
   }
@@ -153,12 +190,24 @@ RedfishResourceConsumeResource (
   // Release resource
   //
   if (Private->Payload != NULL) {
-    RedfishFreeResponse (
-      Response.StatusCode,
-      Response.HeaderCount,
-      Response.Headers,
-      Response.Payload
-      );
+    if (Response.Payload != NULL) {
+      RedfishFreeResponse (
+        Response.StatusCode,
+        Response.HeaderCount,
+        Response.Headers,
+        Response.Payload
+        );
+    }
+
+    if (RedfishSettingsResponse.Payload != NULL) {
+      RedfishFreeResponse (
+        RedfishSettingsResponse.StatusCode,
+        RedfishSettingsResponse.HeaderCount,
+        RedfishSettingsResponse.Headers,
+        RedfishSettingsResponse.Payload
+        );
+    }
+
     Private->Payload = NULL;
   }
 
-- 
2.17.1