[Patch] NetworkPkg: Display HTTP redirection info to the screen if need.

[Fu Siyuan <siyuan.fu@intel.com>]

HTTP defines a set of status code for redirecting a request to a different URI
in Section 6.4 of RFC7231 and also RFC7583. This patch updates the HTTP boot
driver to display the redirection info to the screen so the user would have
chance to know new URI address of the HTTP boot image.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Cc: Ye Ting <ting.ye@intel.com>
Cc: Wu Jiaxin <jiaxin.wu@intel.com>
---
 NetworkPkg/HttpBootDxe/HttpBootDxe.h     |  4 ++++
 NetworkPkg/HttpBootDxe/HttpBootImpl.c    | 21 ++++++++++++++++++++-
 NetworkPkg/HttpBootDxe/HttpBootSupport.c | 25 ++++++++++++++++++++++++-
 NetworkPkg/HttpBootDxe/HttpBootSupport.h | 13 +++++++++++++
 4 files changed, 61 insertions(+), 2 deletions(-)

diff --git a/NetworkPkg/HttpBootDxe/HttpBootDxe.h b/NetworkPkg/HttpBootDxe/HttpBootDxe.h
index 8d89b3e..4632ee2 100644
--- a/NetworkPkg/HttpBootDxe/HttpBootDxe.h
+++ b/NetworkPkg/HttpBootDxe/HttpBootDxe.h
@@ -179,6 +179,10 @@ struct _HTTP_BOOT_PRIVATE_DATA {
   UINT32                                    Id;
   EFI_HTTP_BOOT_CALLBACK_PROTOCOL           *HttpBootCallback;
   EFI_HTTP_BOOT_CALLBACK_PROTOCOL           LoadFileCallback;
+
+  //
+  // Data for the default HTTP Boot callback protocol
+  //
   UINT64                                    FileSize;
   UINT64                                    ReceivedSize;
   UINT32                                    Percentage;
diff --git a/NetworkPkg/HttpBootDxe/HttpBootImpl.c b/NetworkPkg/HttpBootDxe/HttpBootImpl.c
index 63cf396..5cfb0f4 100644
--- a/NetworkPkg/HttpBootDxe/HttpBootImpl.c
+++ b/NetworkPkg/HttpBootDxe/HttpBootImpl.c
@@ -1,7 +1,7 @@
 /** @file
   The implementation of EFI_LOAD_FILE_PROTOCOL for UEFI HTTP boot.
 
-Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
 (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
 This program and the accompanying materials are licensed and made available under 
 the terms and conditions of the BSD License that accompanies this distribution.  
@@ -665,6 +665,25 @@ HttpBootCallback (
   case HttpBootHttpResponse:
     if (Data != NULL) {
       HttpMessage = (EFI_HTTP_MESSAGE *) Data;
+      
+      if (HttpMessage->Data.Response != NULL) {
+        if (HttpBootIsHttpRedirectStatusCode (HttpMessage->Data.Response->StatusCode)) {
+          //
+          // Server indicates the resource has been redirected to a different URL
+          // according to the section 6.4 of RFC7231 and the RFC 7538.
+          // Display the redirect information on the screen.
+          //
+          HttpHeader = HttpFindHeader (
+                 HttpMessage->HeaderCount,
+                 HttpMessage->Headers,
+                 HTTP_HEADER_LOCATION
+                 );
+          if (HttpHeader != NULL) {
+            Print (L"\n  HTTP ERROR: Resource Redirected.\n  New Location: %a\n", HttpHeader->FieldValue);
+          }
+        }
+      }
+      
       HttpHeader = HttpFindHeader (
                      HttpMessage->HeaderCount,
                      HttpMessage->Headers,
diff --git a/NetworkPkg/HttpBootDxe/HttpBootSupport.c b/NetworkPkg/HttpBootDxe/HttpBootSupport.c
index 5024f2e..6d4edfc 100644
--- a/NetworkPkg/HttpBootDxe/HttpBootSupport.c
+++ b/NetworkPkg/HttpBootDxe/HttpBootSupport.c
@@ -1034,7 +1034,8 @@ HttpIoRecvResponse (
     HttpIo->IsRxDone = FALSE;
   }
 
-  if (!EFI_ERROR (HttpIo->RspToken.Status) && HttpIo->Callback != NULL) {
+  if ((HttpIo->Callback != NULL) && 
+      (HttpIo->RspToken.Status == EFI_SUCCESS || HttpIo->RspToken.Status == EFI_HTTP_ERROR)) {
     Status = HttpIo->Callback (
                HttpIoResponse,
                HttpIo->RspToken.Message,
@@ -1319,3 +1320,25 @@ HttpBootRegisterRamDisk (
   return Status;
 }
 
+/**
+  Indicate if the HTTP status code indicates a redirection.
+  
+  @param[in]  StatusCode      HTTP status code from server.
+
+  @return                     TRUE if it's redirection.
+
+**/
+BOOLEAN
+HttpBootIsHttpRedirectStatusCode (
+  IN   EFI_HTTP_STATUS_CODE        StatusCode
+ )
+{
+  if (StatusCode == HTTP_STATUS_301_MOVED_PERMANENTLY ||
+      StatusCode == HTTP_STATUS_302_FOUND ||
+      StatusCode == HTTP_STATUS_307_TEMPORARY_REDIRECT ||
+      StatusCode == HTTP_STATUS_308_PERMANENT_REDIRECT) {
+    return TRUE;
+  }
+
+  return FALSE;
+}
diff --git a/NetworkPkg/HttpBootDxe/HttpBootSupport.h b/NetworkPkg/HttpBootDxe/HttpBootSupport.h
index f2b1846..c10b2cf 100644
--- a/NetworkPkg/HttpBootDxe/HttpBootSupport.h
+++ b/NetworkPkg/HttpBootDxe/HttpBootSupport.h
@@ -445,4 +445,17 @@ HttpBootRegisterRamDisk (
   IN  VOID                         *Buffer,
   IN  HTTP_BOOT_IMAGE_TYPE         ImageType
   );
+
+/**
+  Indicate if the HTTP status code indicates a redirection.
+  
+  @param[in]  StatusCode      HTTP status code from server.
+
+  @return                     TRUE if it's redirection.
+
+**/
+BOOLEAN
+HttpBootIsHttpRedirectStatusCode (
+  IN   EFI_HTTP_STATUS_CODE        StatusCode
+ );
 #endif
-- 
1.9.5.msysgit.1