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diff --git a/RedfishPkg/Include/Library/RedfishContentCodingLib.h b/RedfishPkg/Include/Library/RedfishContentCodingLib.h
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+++ b/RedfishPkg/Include/Library/RedfishContentCodingLib.h
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+/** @file
+  Definitinos of RedfishContentCodingLib.
+
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+#ifndef REDFISH_CONTENT_CODING_LIB_H_
+#define REDFISH_CONTENT_CODING_LIB_H_
+
+/**
+  This is the function to encode the content use the
+  algorithm indicated in ContentEncodedValue. The naming of
+  ContentEncodedValue is follow HTTP spec or could be a
+  platform-specific value.
+
+  @param[in]   ContentEncodedValue   HTTP conent encoded value.
+                                     The value could be one of below
+                                     or any which is platform-specific.
+                                       - HTTP_CONTENT_ENCODING_IDENTITY "identity"
+                                       - HTTP_CONTENT_ENCODING_GZIP     "gzip"
+                                       - HTTP_CONTENT_ENCODING_COMPRESS "compress"
+                                       - HTTP_CONTENT_ENCODING_DEFLATE  "deflate"
+                                       - HTTP_CONTENT_ENCODING_BROTLI   "br"
+  @param[in]   OriginalContent       Original content.
+  @param[in]   OriginalContentLength The length of original content.
+  @param[out]  EncodedContentPointer Pointer to receive the encoded content pointer.
+  @param[out]  EncodedContentLength  Length of encoded content.
+
+  @retval EFI_SUCCESS              Content is encoded successfully.
+  @retval EFI_UNSUPPORTED          No supported encoding funciton,
+  @retval EFI_INVALID_PARAMETER    One of the given parameter is invalid.
+
+**/
+
+EFI_STATUS
+RedfishContentEncode  (
+  IN CHAR8  *ContentEncodedValue,
+  IN CHAR8  *OriginalContent,
+  IN UINTN  OriginalContentLength,
+  OUT VOID  **EncodedContentPointer,
+  OUT UINTN *EncodedLength
+  );
+
+/**
+  This is the function to decode the content use the
+  algorithm indicated in ContentEncodedValue. The naming of
+  ContentEncodedValue is follow HTTP spec or could be a
+  platform-specific value.
+
+  @param[in]   ContentDecodedValue   HTTP conent decoded value.
+                                     The value could be one of below
+                                     or any which is platform-specific.
+                                       - HTTP_CONTENT_ENCODING_IDENTITY "identity"
+                                       - HTTP_CONTENT_ENCODING_GZIP     "gzip"
+                                       - HTTP_CONTENT_ENCODING_COMPRESS "compress"
+                                       - HTTP_CONTENT_ENCODING_DEFLATE  "deflate"
+                                       - HTTP_CONTENT_ENCODING_BROTLI   "br"
+  @param[in]   ContentPointer        Original content.
+  @param[in]   ContentLength         The length of original content.
+  @param[out]  DecodedContentPointer Pointer to receive decoded content pointer.
+  @param[out]  DecodedContentLength  Length of decoded content.
+
+  @retval EFI_SUCCESS              Content is decoded successfully.
+  @retval EFI_UNSUPPORTED          No supported decoding funciton,
+  @retval EFI_INVALID_PARAMETER    One of the given parameter is invalid.
+
+**/
+EFI_STATUS
+RedfishContentDecode (
+  IN CHAR8  *ContentEncodedValue,
+  IN VOID   *ContentPointer,
+  IN UINTN  ContentLength,
+  OUT VOID  **DecodedContentPointer,
+  OUT UINTN *DecodedLength
+  );
+#endif