MdeModulePkg: Add HttpLib.

This patch add the header file and DXE implementation for the HttpLib.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17856 6f19259b-4bc3-4df7-8a09-765794883524

3 files changed, 1401 insertions, 0 deletions

diff --git a/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.c b/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.c
new file mode 100644
index 0000000000..3b0d9c9604
--- /dev/null
+++ b/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.c
@@ -0,0 +1,1359 @@
+/** @file
+  This library is used to share code between UEFI network stack modules.
+  It provides the helper routines to parse the HTTP message byte stream.
+
+Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at<BR>
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Uefi.h>
+#include <Library/NetLib.h>
+#include <Library/HttpLib.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+#define BIT(x)  (1 << x)
+
+#define NET_IS_HEX_CHAR(Ch)   \
+  ((('0' <= (Ch)) && ((Ch) <= '9')) ||  \
+   (('A' <= (Ch)) && ((Ch) <= 'F')) ||  \
+   (('a' <= (Ch)) && ((Ch) <= 'f')))
+
+//
+// Field index of the HTTP URL parse result.
+//
+#define   HTTP_URI_FIELD_SCHEME           0
+#define   HTTP_URI_FIELD_AUTHORITY        1
+#define   HTTP_URI_FIELD_PATH             2
+#define   HTTP_URI_FIELD_QUERY            3
+#define   HTTP_URI_FIELD_FRAGMENT         4
+#define   HTTP_URI_FIELD_USERINFO         5
+#define   HTTP_URI_FIELD_HOST             6
+#define   HTTP_URI_FIELD_PORT             7
+#define   HTTP_URI_FIELD_MAX              8
+
+//
+// Structure to store the parse result of a HTTP URL.
+//
+typedef struct {
+    UINT32      Offset;
+    UINT32      Length;
+} HTTP_URL_FILED_DATA;
+
+typedef struct {
+  UINT16                  FieldBitMap;
+  HTTP_URL_FILED_DATA     FieldData[HTTP_URI_FIELD_MAX];
+} HTTP_URL_PARSER;
+
+typedef enum {
+  UrlParserUrlStart,
+  UrlParserScheme,
+  UrlParserSchemeColon,            // ":"
+  UrlParserSchemeColonSlash,       // ":/"
+  UrlParserSchemeColonSlashSlash,  // "://"
+  UrlParserAuthority,
+  UrlParserAtInAuthority,
+  UrlParserPath,
+  UrlParserQueryStart,    // "?"
+  UrlParserQuery,
+  UrlParserFragmentStart, // "#"
+  UrlParserFragment,
+  UrlParserUserInfo,
+  UrlParserHostStart,     // "@"
+  UrlParserHost,
+  UrlParserPortStart,     // ":"
+  UrlParserPort,
+  UrlParserStateMax
+} HTTP_URL_PARSE_STATE;
+
+/**
+  Decode a percent-encoded URI component to the ASCII character.
+  
+  Decode the input component in Buffer according to RFC 3986. The caller is responsible to make 
+  sure ResultBuffer points to a buffer with size equal or greater than ((AsciiStrSize (Buffer))
+  in bytes. 
+
+  @param[in]    Buffer           The pointer to a percent-encoded URI component.
+  @param[in]    BufferLength     Length of Buffer in bytes.
+  @param[out]   ResultBuffer     Point to the buffer to store the decode result.
+  @param[out]   ResultLength     Length of decoded string in ResultBuffer in bytes.
+
+  @retval EFI_SUCCESS            Successfully decoded the URI.
+  @retval EFI_INVALID_PARAMETER  Buffer is not a valid percent-encoded string.
+  
+**/
+EFI_STATUS
+EFIAPI
+UriPercentDecode (
+  IN      CHAR8            *Buffer,
+  IN      UINT32            BufferLength,
+     OUT  CHAR8            *ResultBuffer,
+     OUT  UINT32           *ResultLength
+  )
+{
+  UINTN           Index;
+  UINTN           Offset;
+  CHAR8           HexStr[3];
+
+  if (Buffer == NULL || BufferLength == 0 || ResultBuffer == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+  
+  Index = 0;
+  Offset = 0;
+  HexStr[2] = '\0';
+  while (Index < BufferLength) {
+    if (Buffer[Index] == '%') {
+      if (!NET_IS_HEX_CHAR (Buffer[Index+1]) || !NET_IS_HEX_CHAR (Buffer[Index+2])) {
+        return EFI_INVALID_PARAMETER;
+      }
+      HexStr[0] = Buffer[Index+1];
+      HexStr[1] = Buffer[Index+2];
+      ResultBuffer[Offset] = (CHAR8) AsciiStrHexToUintn (HexStr);
+      Index += 3;
+    } else {
+      ResultBuffer[Offset] = Buffer[Index];
+      Index++;
+    }
+    Offset++;
+  }
+
+  *ResultLength = (UINT32) Offset;
+    
+  return EFI_SUCCESS;
+}
+
+/**
+  This function return the updated state accroding to the input state and next character of
+  the authority.
+
+  @param[in]       Char           Next character.
+  @param[in]       State          Current value of the parser state machine.
+
+  @return          Updated state value.
+**/
+HTTP_URL_PARSE_STATE
+NetHttpParseAuthorityChar (
+  IN  CHAR8                  Char,
+  IN  HTTP_URL_PARSE_STATE   State
+  )
+{
+
+  //
+  // RFC 3986:
+  // The authority component is preceded by a double slash ("//") and is
+  // terminated by the next slash ("/"), question mark ("?"), or number
+  // sign ("#") character, or by the end of the URI.
+  //
+  if (Char == ' ' || Char == '\r' || Char == '\n') {
+    return UrlParserStateMax;
+  }
+
+  //
+  // authority   = [ userinfo "@" ] host [ ":" port ]
+  //
+  switch (State) {
+  case UrlParserUserInfo:
+    if (Char == '@') {
+      return UrlParserHostStart;
+    }
+    break;
+
+  case UrlParserHost:
+  case UrlParserHostStart:
+    if (Char == ':') {
+      return UrlParserPortStart;
+    }
+    return UrlParserHost;
+
+  case UrlParserPort:
+  case UrlParserPortStart:
+    return UrlParserPort;
+
+  default:
+    break;
+  }
+
+  return State;
+}
+
+/**
+  This function parse the authority component of the input URL and update the parser.
+
+  @param[in]       Url            The pointer to a HTTP URL string.
+  @param[in]       FoundAt        TRUE if there is an at sign ('@') in the authority component.
+  @param[in, out]  UrlParser      Pointer to the buffer of the parse result.
+
+  @retval EFI_SUCCESS             Successfully parse the authority.
+  @retval Other                   Error happened.
+
+**/
+EFI_STATUS
+NetHttpParseAuthority (
+  IN      CHAR8              *Url,
+  IN      BOOLEAN            FoundAt,
+  IN OUT  HTTP_URL_PARSER    *UrlParser
+  )
+{
+  CHAR8                 *Char;
+  CHAR8                 *Authority;
+  UINT32                Length;
+  HTTP_URL_PARSE_STATE  State;
+  UINT32                Field;
+  UINT32                OldField;
+  
+  ASSERT ((UrlParser->FieldBitMap & BIT (HTTP_URI_FIELD_AUTHORITY)) != 0);
+
+  //
+  // authority   = [ userinfo "@" ] host [ ":" port ]
+  //
+  if (FoundAt) {
+    State = UrlParserUserInfo;
+  } else {
+    State = UrlParserHost;
+  }
+
+  Field = HTTP_URI_FIELD_MAX;
+  OldField = Field;
+  Authority = Url + UrlParser->FieldData[HTTP_URI_FIELD_AUTHORITY].Offset;
+  Length = UrlParser->FieldData[HTTP_URI_FIELD_AUTHORITY].Length;
+  for (Char = Authority; Char < Authority + Length; Char++) {
+    State = NetHttpParseAuthorityChar (*Char, State);
+    switch (State) {
+    case UrlParserStateMax:
+      return EFI_INVALID_PARAMETER;
+
+    case UrlParserHostStart:
+    case UrlParserPortStart:
+      continue;
+
+    case UrlParserUserInfo:
+      Field = HTTP_URI_FIELD_USERINFO;
+      break;
+      
+    case UrlParserHost:
+      Field = HTTP_URI_FIELD_HOST;
+      break;
+      
+    case UrlParserPort:
+      Field = HTTP_URI_FIELD_PORT;
+      break;
+
+    default:
+      ASSERT (FALSE);
+    }
+
+    //
+    // Field not changed, count the length.
+    //
+    ASSERT (Field < HTTP_URI_FIELD_MAX);
+    if (Field == OldField) {
+      UrlParser->FieldData[Field].Length++;
+      continue;
+    }
+
+    //
+    // New field start
+    //
+    UrlParser->FieldBitMap |= BIT (Field);
+    UrlParser->FieldData[Field].Offset = (UINT32) (Char - Url);
+    UrlParser->FieldData[Field].Length = 1;
+    OldField = Field;
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  This function return the updated state accroding to the input state and next character of a URL.
+
+  @param[in]       Char           Next character.
+  @param[in]       State          Current value of the parser state machine.
+
+  @return          Updated state value.
+
+**/
+HTTP_URL_PARSE_STATE
+NetHttpParseUrlChar (
+  IN  CHAR8                  Char,
+  IN  HTTP_URL_PARSE_STATE   State
+  )
+{
+  if (Char == ' ' || Char == '\r' || Char == '\n') {
+    return UrlParserStateMax;
+  }
+  
+  //
+  // http_URL = "http:" "//" host [ ":" port ] [ abs_path [ "?" query ]]
+  // 
+  // Request-URI    = "*" | absolute-URI | path-absolute | authority
+  // 
+  // absolute-URI  = scheme ":" hier-part [ "?" query ]
+  // path-absolute = "/" [ segment-nz *( "/" segment ) ]
+  // authority   = [ userinfo "@" ] host [ ":" port ]
+  //
+  switch (State) {
+  case UrlParserUrlStart:
+    if (Char == '*' || Char == '/') {
+      return UrlParserPath;
+    }
+    return UrlParserScheme;
+
+  case UrlParserScheme:
+    if (Char == ':') {
+      return UrlParserSchemeColon;
+    }
+    break;
+
+  case UrlParserSchemeColon:
+    if (Char == '/') {
+      return UrlParserSchemeColonSlash;
+    }
+    break;
+
+  case UrlParserSchemeColonSlash:
+    if (Char == '/') {
+      return UrlParserSchemeColonSlashSlash;
+    }
+    break;
+
+  case UrlParserAtInAuthority:
+    if (Char == '@') {
+      return UrlParserStateMax;
+    }
+
+  case UrlParserAuthority:
+  case UrlParserSchemeColonSlashSlash:
+    if (Char == '@') {
+      return UrlParserAtInAuthority;
+    }
+    if (Char == '/') {
+      return UrlParserPath;
+    }
+    if (Char == '?') {
+      return UrlParserQueryStart;
+    }
+    if (Char == '#') {
+      return UrlParserFragmentStart;
+    }
+    return UrlParserAuthority;
+
+  case UrlParserPath:
+    if (Char == '?') {
+      return UrlParserQueryStart;
+    }
+    if (Char == '#') {
+      return UrlParserFragmentStart;
+    }
+    break;
+
+  case UrlParserQuery:
+  case UrlParserQueryStart:
+    if (Char == '#') {
+      return UrlParserFragmentStart;
+    }
+    return UrlParserQuery;
+
+  case UrlParserFragmentStart:
+    return UrlParserFragment;
+    
+  default:
+    break;
+  }
+
+  return State;
+}
+/**
+  Create a URL parser for the input URL string.
+
+  This function will parse and dereference the input HTTP URL into it components. The original
+  content of the URL won't be modified and the result will be returned in UrlParser, which can
+  be used in other functions like NetHttpUrlGetHostName().
+
+  @param[in]    Url                The pointer to a HTTP URL string.
+  @param[in]    Length             Length of Url in bytes.
+  @param[in]    IsConnectMethod    Whether the Url is used in HTTP CONNECT method or not.
+  @param[out]   UrlParser          Pointer to the returned buffer to store the parse result.
+
+  @retval EFI_SUCCESS              Successfully dereferenced the HTTP URL.
+  @retval EFI_INVALID_PARAMETER    UrlParser is NULL or Url is not a valid HTTP URL.
+  @retval EFI_OUT_OF_RESOURCES     Could not allocate needed resources.
+
+**/
+EFI_STATUS
+EFIAPI
+HttpParseUrl (
+  IN      CHAR8              *Url,
+  IN      UINT32             Length,
+  IN      BOOLEAN            IsConnectMethod,
+     OUT  VOID               **UrlParser
+  )
+{
+  HTTP_URL_PARSE_STATE  State;
+  CHAR8                 *Char;
+  UINT32                Field;
+  UINT32                OldField;
+  BOOLEAN               FoundAt;
+  EFI_STATUS            Status;
+  HTTP_URL_PARSER       *Parser;
+  
+  if (Url == NULL || Length == 0 || UrlParser == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Parser = AllocateZeroPool (sizeof (HTTP_URL_PARSER));
+  if (Parser == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+  
+  if (IsConnectMethod) {
+    //
+    // According to RFC 2616, the authority form is only used by the CONNECT method.
+    //
+    State = UrlParserAuthority;
+  } else {
+    State = UrlParserUrlStart;
+  }
+
+  Field = HTTP_URI_FIELD_MAX;
+  OldField = Field;
+  FoundAt = FALSE;
+  for (Char = Url; Char < Url + Length; Char++) {
+    //
+    // Update state machine accoring to next char.
+    //
+    State = NetHttpParseUrlChar (*Char, State);
+
+    switch (State) {
+    case UrlParserStateMax:
+      return EFI_INVALID_PARAMETER;
+      
+    case UrlParserSchemeColon:
+    case UrlParserSchemeColonSlash:
+    case UrlParserSchemeColonSlashSlash:
+    case UrlParserQueryStart:
+    case UrlParserFragmentStart:
+      //
+      // Skip all the delimiting char: "://" "?" "@"
+      //
+      continue;
+    
+    case UrlParserScheme:
+      Field = HTTP_URI_FIELD_SCHEME;
+      break;
+
+    case UrlParserAtInAuthority:
+      FoundAt = TRUE;
+    case UrlParserAuthority:
+      Field = HTTP_URI_FIELD_AUTHORITY;
+      break;
+
+    case UrlParserPath:
+      Field = HTTP_URI_FIELD_PATH;
+      break;
+
+    case UrlParserQuery:
+      Field = HTTP_URI_FIELD_QUERY;
+      break;
+
+    case UrlParserFragment:
+      Field = HTTP_URI_FIELD_FRAGMENT;
+      break;
+
+    default:
+      ASSERT (FALSE);
+    }
+
+    //
+    // Field not changed, count the length.
+    //
+    ASSERT (Field < HTTP_URI_FIELD_MAX);
+    if (Field == OldField) {
+      Parser->FieldData[Field].Length++;
+      continue;
+    }
+
+    //
+    // New field start
+    //
+    Parser->FieldBitMap |= BIT (Field);
+    Parser->FieldData[Field].Offset = (UINT32) (Char - Url);
+    Parser->FieldData[Field].Length = 1;
+    OldField = Field;
+  }
+
+  //
+  // If has authority component, continue to parse the username, host and port.
+  //
+  if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_AUTHORITY)) != 0) {
+    Status = NetHttpParseAuthority (Url, FoundAt, Parser);
+    if (EFI_ERROR (Status)) {
+      return Status;
+    }
+  }
+
+  *UrlParser = Parser;
+  return EFI_SUCCESS;  
+}
+
+/**
+  Get the Hostname from a HTTP URL.
+
+  This function will return the HostName according to the Url and previous parse result ,and
+  it is the caller's responsibility to free the buffer returned in *HostName.
+
+  @param[in]    Url                The pointer to a HTTP URL string.
+  @param[in]    UrlParser          URL Parse result returned by NetHttpParseUrl().
+  @param[out]   HostName           Pointer to a buffer to store the HostName.
+
+  @retval EFI_SUCCESS              Successfully get the required component.
+  @retval EFI_INVALID_PARAMETER    Uri is NULL or HostName is NULL or UrlParser is invalid.
+  @retval EFI_NOT_FOUND            No hostName component in the URL.
+  @retval EFI_OUT_OF_RESOURCES     Could not allocate needed resources.
+  
+**/
+EFI_STATUS
+EFIAPI
+HttpUrlGetHostName (
+  IN      CHAR8              *Url,
+  IN      VOID               *UrlParser,
+     OUT  CHAR8              **HostName
+  )
+{
+  CHAR8                *Name;
+  EFI_STATUS           Status;
+  UINT32               ResultLength;
+  HTTP_URL_PARSER      *Parser;
+
+  if (Url == NULL || UrlParser == NULL || HostName == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Parser = (HTTP_URL_PARSER*) UrlParser;
+
+  if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_HOST)) == 0) {
+    return EFI_NOT_FOUND;
+  }
+
+  Name = AllocatePool (Parser->FieldData[HTTP_URI_FIELD_HOST].Length + 1);
+  if (Name == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+  
+  Status = UriPercentDecode (
+             Url + Parser->FieldData[HTTP_URI_FIELD_HOST].Offset,
+             Parser->FieldData[HTTP_URI_FIELD_HOST].Length,
+             Name,
+             &ResultLength
+             );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Name[ResultLength] = '\0';
+  *HostName = Name;
+  return EFI_SUCCESS;
+}
+
+
+/**
+  Get the IPv4 address from a HTTP URL.
+
+  This function will return the IPv4 address according to the Url and previous parse result.
+
+  @param[in]    Url                The pointer to a HTTP URL string.
+  @param[in]    UrlParser          URL Parse result returned by NetHttpParseUrl().
+  @param[out]   Ip4Address         Pointer to a buffer to store the IP address.
+
+  @retval EFI_SUCCESS              Successfully get the required component.
+  @retval EFI_INVALID_PARAMETER    Uri is NULL or Ip4Address is NULL or UrlParser is invalid.
+  @retval EFI_NOT_FOUND            No IPv4 address component in the URL.
+  @retval EFI_OUT_OF_RESOURCES     Could not allocate needed resources.
+  
+**/
+EFI_STATUS
+EFIAPI
+HttpUrlGetIp4 (
+  IN      CHAR8              *Url,
+  IN      VOID               *UrlParser,
+     OUT  EFI_IPv4_ADDRESS   *Ip4Address
+  )
+{
+  CHAR8                *Ip4String;
+  EFI_STATUS           Status;
+  UINT32               ResultLength;
+  HTTP_URL_PARSER      *Parser;
+  
+  if (Url == NULL || UrlParser == NULL || Ip4Address == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Parser = (HTTP_URL_PARSER*) UrlParser;
+
+  if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_HOST)) == 0) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Ip4String = AllocatePool (Parser->FieldData[HTTP_URI_FIELD_HOST].Length + 1);
+  if (Ip4String == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+  
+  Status = UriPercentDecode (
+             Url + Parser->FieldData[HTTP_URI_FIELD_HOST].Offset,
+             Parser->FieldData[HTTP_URI_FIELD_HOST].Length,
+             Ip4String,
+             &ResultLength
+             );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Ip4String[ResultLength] = '\0';
+  Status = NetLibAsciiStrToIp4 (Ip4String, Ip4Address);
+  FreePool (Ip4String);
+
+  return Status;
+}
+
+/**
+  Get the IPv6 address from a HTTP URL.
+
+  This function will return the IPv6 address according to the Url and previous parse result.
+
+  @param[in]    Url                The pointer to a HTTP URL string.
+  @param[in]    UrlParser          URL Parse result returned by NetHttpParseUrl().
+  @param[out]   Ip6Address         Pointer to a buffer to store the IP address.
+
+  @retval EFI_SUCCESS              Successfully get the required component.
+  @retval EFI_INVALID_PARAMETER    Uri is NULL or Ip6Address is NULL or UrlParser is invalid.
+  @retval EFI_NOT_FOUND            No IPv6 address component in the URL.
+  @retval EFI_OUT_OF_RESOURCES     Could not allocate needed resources.
+  
+**/
+EFI_STATUS
+EFIAPI
+HttpUrlGetIp6 (
+  IN      CHAR8              *Url,
+  IN      VOID               *UrlParser,
+     OUT  EFI_IPv6_ADDRESS   *Ip6Address
+  )
+{
+  CHAR8                *Ip6String;
+  CHAR8                *Ptr;
+  UINT32               Length;
+  EFI_STATUS           Status;
+  UINT32               ResultLength;
+  HTTP_URL_PARSER      *Parser;
+  
+  if (Url == NULL || UrlParser == NULL || Ip6Address == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Parser = (HTTP_URL_PARSER*) UrlParser;
+
+  if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_HOST)) == 0) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  //
+  // IP-literal = "[" ( IPv6address / IPvFuture  ) "]"
+  //
+  Length = Parser->FieldData[HTTP_URI_FIELD_HOST].Length;
+  if (Length < 2) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Ptr    = Url + Parser->FieldData[HTTP_URI_FIELD_HOST].Offset;
+  if ((Ptr[0] != '[') || (Ptr[Length - 1] != ']')) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Ip6String = AllocatePool (Length);
+  if (Ip6String == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+  
+  Status = UriPercentDecode (
+             Ptr + 1,
+             Length - 2,
+             Ip6String,
+             &ResultLength
+             );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+  
+  Ip6String[ResultLength] = '\0';
+  Status = NetLibAsciiStrToIp6 (Ip6String, Ip6Address);
+  FreePool (Ip6String);
+
+  return Status;
+}
+
+/**
+  Get the port number from a HTTP URL.
+
+  This function will return the port number according to the Url and previous parse result.
+
+  @param[in]    Url                The pointer to a HTTP URL string.
+  @param[in]    UrlParser          URL Parse result returned by NetHttpParseUrl().
+  @param[out]   Port               Pointer to a buffer to store the port number.
+
+  @retval EFI_SUCCESS              Successfully get the required component.
+  @retval EFI_INVALID_PARAMETER    Uri is NULL or Port is NULL or UrlParser is invalid.
+  @retval EFI_NOT_FOUND            No port number in the URL.
+  @retval EFI_OUT_OF_RESOURCES     Could not allocate needed resources.
+  
+**/
+EFI_STATUS
+EFIAPI
+HttpUrlGetPort (
+  IN      CHAR8              *Url,
+  IN      VOID               *UrlParser,
+     OUT  UINT16             *Port
+  )
+{
+  CHAR8         *PortString;
+  EFI_STATUS    Status;
+  UINT32        ResultLength;
+  HTTP_URL_PARSER      *Parser;
+
+  if (Url == NULL || UrlParser == NULL || Port == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Parser = (HTTP_URL_PARSER*) UrlParser;
+
+  if ((Parser->FieldBitMap & BIT (HTTP_URI_FIELD_PORT)) == 0) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  PortString = AllocatePool (Parser->FieldData[HTTP_URI_FIELD_PORT].Length + 1);
+  if (PortString == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  Status = UriPercentDecode (
+             Url + Parser->FieldData[HTTP_URI_FIELD_PORT].Offset,
+             Parser->FieldData[HTTP_URI_FIELD_PORT].Length,
+             PortString,
+             &ResultLength
+             );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  PortString[ResultLength] = '\0';
+  *Port = (UINT16) AsciiStrDecimalToUintn (Url + Parser->FieldData[HTTP_URI_FIELD_PORT].Offset);
+
+  return  EFI_SUCCESS;
+}
+
+/**
+  Release the resource of the URL parser.
+
+  @param[in]    UrlParser            Pointer to the parser.
+  
+**/
+VOID
+EFIAPI
+HttpUrlFreeParser (
+  IN      VOID               *UrlParser
+  )
+{
+  FreePool (UrlParser);
+}
+
+/**
+  Find a specified header field according to the field name.
+
+  @param[in]   HeaderCount      Number of HTTP header structures in Headers list. 
+  @param[in]   Headers          Array containing list of HTTP headers.
+  @param[in]   FieldName        Null terminated string which describes a field name. 
+
+  @return    Pointer to the found header or NULL.
+
+**/
+EFI_HTTP_HEADER *
+HttpIoFindHeader (
+  IN  UINTN                HeaderCount,
+  IN  EFI_HTTP_HEADER      *Headers,
+  IN  CHAR8                *FieldName
+  )
+{
+  UINTN                 Index;
+  
+  if (HeaderCount == 0 || Headers == NULL || FieldName == NULL) {
+    return NULL;
+  }
+
+  for (Index = 0; Index < HeaderCount; Index++){
+    //
+    // Field names are case-insensitive (RFC 2616).
+    //
+    if (AsciiStriCmp (Headers[Index].FieldName, FieldName) == 0) {
+      return &Headers[Index];
+    }
+  }
+  return NULL;
+}
+
+typedef enum {
+  BodyParserBodyStart,
+  BodyParserBodyIdentity,
+  BodyParserChunkSizeStart,
+  BodyParserChunkSize,
+  BodyParserChunkSizeEndCR,
+  BodyParserChunkExtStart,
+  BodyParserChunkDataStart,
+  BodyParserChunkDataEnd,
+  BodyParserChunkDataEndCR,
+  BodyParserComplete,
+  BodyParserStateMax
+} HTTP_BODY_PARSE_STATE;
+
+typedef struct {
+  BOOLEAN                       IgnoreBody;    // "MUST NOT" include a message-body
+  BOOLEAN                       IsChunked;     // "chunked" transfer-coding.
+  BOOLEAN                       ContentLengthIsValid;
+  UINTN                         ContentLength; // Entity length (not the message-body length), invalid until ContentLengthIsValid is TRUE
+  
+  HTTP_BODY_PARSER_CALLBACK     Callback;
+  VOID                          *Context;
+  UINTN                         ParsedBodyLength;
+  HTTP_BODY_PARSE_STATE         State;
+  UINTN                         CurrentChunkSize;
+  UINTN                         CurrentChunkParsedSize;
+} HTTP_BODY_PARSER;
+
+/**
+
+  Convert an Ascii char to its uppercase.
+
+  @param[in]       Char           Ascii character.
+
+  @return          Uppercase value of the input Char.
+
+**/
+CHAR8
+HttpIoCharToUpper (
+  IN      CHAR8                    Char
+  )
+{
+  if (Char >= 'a' && Char <= 'z') {
+    return  Char - ('a' - 'A');
+  }
+
+  return Char;
+}
+
+/**
+  Convert an hexadecimal char to a value of type UINTN.
+
+  @param[in]       Char           Ascii character.
+
+  @return          Value translated from Char.
+
+**/
+UINTN
+HttpIoHexCharToUintn (
+  IN CHAR8           Char
+  )
+{
+  if (Char >= '0' && Char <= '9') {
+    return Char - '0';
+  }
+
+  return (10 + HttpIoCharToUpper (Char) - 'A');
+}
+
+/**
+  Get the value of the content length if there is a "Content-Length" header.
+
+  @param[in]    HeaderCount        Number of HTTP header structures in Headers.
+  @param[in]    Headers            Array containing list of HTTP headers.
+  @param[out]   ContentLength      Pointer to save the value of the content length.
+
+  @retval EFI_SUCCESS              Successfully get the content length.
+  @retval EFI_NOT_FOUND            No "Content-Length" header in the Headers.
+
+**/
+EFI_STATUS
+HttpIoParseContentLengthHeader (
+  IN     UINTN                HeaderCount,
+  IN     EFI_HTTP_HEADER      *Headers,
+     OUT UINTN                *ContentLength
+  )
+{
+  EFI_HTTP_HEADER       *Header;
+  
+  Header = HttpIoFindHeader (HeaderCount, Headers, "Content-Length");
+  if (Header == NULL) {
+    return EFI_NOT_FOUND;
+  }
+
+  *ContentLength = AsciiStrDecimalToUintn (Header->FieldValue);
+  return EFI_SUCCESS;
+}
+
+/**
+
+  Check whether the HTTP message is using the "chunked" transfer-coding.
+
+  @param[in]    HeaderCount        Number of HTTP header structures in Headers.
+  @param[in]    Headers            Array containing list of HTTP headers.
+
+  @return       The message is "chunked" transfer-coding (TRUE) or not (FALSE).
+ 
+**/
+BOOLEAN
+HttpIoIsChunked (
+  IN   UINTN                    HeaderCount,
+  IN   EFI_HTTP_HEADER          *Headers
+  )
+{
+  EFI_HTTP_HEADER       *Header;
+
+
+  Header = HttpIoFindHeader (HeaderCount, Headers, "Transfer-Encoding");
+  if (Header == NULL) {
+    return FALSE;
+  }
+
+  if (AsciiStriCmp (Header->FieldValue, "identity") != 0) {
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+/**
+  Check whether the HTTP message should have a message-body.
+
+  @param[in]    Method             The HTTP method (e.g. GET, POST) for this HTTP message.
+  @param[in]    StatusCode         Response status code returned by the remote host.
+
+  @return       The message should have a message-body (FALSE) or not (TRUE).
+
+**/
+BOOLEAN
+HttpIoNoMessageBody (
+  IN   EFI_HTTP_METHOD          Method,
+  IN   EFI_HTTP_STATUS_CODE     StatusCode
+  )
+{
+  //
+  // RFC 2616:
+  // All responses to the HEAD request method
+  // MUST NOT include a message-body, even though the presence of entity-
+  // header fields might lead one to believe they do. All 1xx
+  // (informational), 204 (no content), and 304 (not modified) responses
+  // MUST NOT include a message-body. All other responses do include a
+  // message-body, although it MAY be of zero length.
+  //
+  if (Method == HttpMethodHead) {
+    return TRUE;
+  }
+
+  if ((StatusCode == HTTP_STATUS_100_CONTINUE) ||
+      (StatusCode == HTTP_STATUS_101_SWITCHING_PROTOCOLS) ||
+      (StatusCode == HTTP_STATUS_204_NO_CONTENT) ||
+      (StatusCode == HTTP_STATUS_304_NOT_MODIFIED))
+  {
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+/**
+  Initialize a HTTP message-body parser.
+
+  This function will create and initialize a HTTP message parser according to caller provided HTTP message
+  header information. It is the caller's responsibility to free the buffer returned in *UrlParser by HttpFreeMsgParser().
+
+  @param[in]    Method             The HTTP method (e.g. GET, POST) for this HTTP message.
+  @param[in]    StatusCode         Response status code returned by the remote host.
+  @param[in]    HeaderCount        Number of HTTP header structures in Headers.
+  @param[in]    Headers            Array containing list of HTTP headers.
+  @param[in]    Callback           Callback function that is invoked when parsing the HTTP message-body,
+                                   set to NULL to ignore all events.
+  @param[in]    Context            Pointer to the context that will be passed to Callback.
+  @param[out]   MsgParser          Pointer to the returned buffer to store the message parser.
+
+  @retval EFI_SUCCESS              Successfully initialized the parser.
+  @retval EFI_OUT_OF_RESOURCES     Could not allocate needed resources.
+  @retval EFI_INVALID_PARAMETER    MsgParser is NULL or HeaderCount is not NULL but Headers is NULL.
+  @retval Others                   Failed to initialize the parser.
+
+**/
+EFI_STATUS
+EFIAPI
+HttpInitMsgParser (
+  IN     EFI_HTTP_METHOD               Method,
+  IN     EFI_HTTP_STATUS_CODE          StatusCode,
+  IN     UINTN                         HeaderCount,
+  IN     EFI_HTTP_HEADER               *Headers,
+  IN     HTTP_BODY_PARSER_CALLBACK     Callback,
+  IN     VOID                          *Context,
+    OUT  VOID                          **MsgParser
+  )
+{
+  EFI_STATUS            Status;
+  HTTP_BODY_PARSER      *Parser;
+  
+  if (HeaderCount != 0 && Headers == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  if (MsgParser == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Parser = AllocateZeroPool (sizeof (HTTP_BODY_PARSER));
+  if (Parser == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  Parser->State = BodyParserBodyStart;
+  
+  //
+  // Determine the message length accroding to RFC 2616.
+  // 1. Check whether the message "MUST NOT" have a message-body.
+  //
+  Parser->IgnoreBody = HttpIoNoMessageBody (Method, StatusCode);
+  //
+  // 2. Check whether the message using "chunked" transfer-coding.
+  //
+  Parser->IsChunked  = HttpIoIsChunked (HeaderCount, Headers);
+  //
+  // 3. Check whether the message has a Content-Length header field.
+  //
+  Status = HttpIoParseContentLengthHeader (HeaderCount, Headers, &Parser->ContentLength);
+  if (!EFI_ERROR (Status)) {
+    Parser->ContentLengthIsValid = TRUE;
+  }
+  //
+  // 4. Range header is not supported now, so we won't meet media type "multipart/byteranges".
+  // 5. By server closing the connection
+  //
+  
+  //
+  // Set state to skip body parser if the message shouldn't have a message body.
+  //
+  if (Parser->IgnoreBody) {
+    Parser->State = BodyParserComplete;
+  } else {
+    Parser->Callback = Callback;
+    Parser->Context  = Context;
+  }
+
+  *MsgParser = Parser;
+  return EFI_SUCCESS;
+}
+
+/**
+  Parse message body.
+
+  Parse BodyLength of message-body. This function can be called repeatedly to parse the message-body partially.
+
+  @param[in, out]    MsgParser            Pointer to the message parser.
+  @param[in]         BodyLength           Length in bytes of the Body.
+  @param[in]         Body                 Pointer to the buffer of the message-body to be parsed.
+
+  @retval EFI_SUCCESS                Successfully parse the message-body.
+  @retval EFI_INVALID_PARAMETER      MsgParser is NULL or Body is NULL or BodyLength is 0.
+  @retval Others                     Operation aborted.
+
+**/
+EFI_STATUS
+EFIAPI
+HttpParseMessageBody (
+  IN OUT VOID              *MsgParser,
+  IN     UINTN             BodyLength,
+  IN     CHAR8             *Body
+  )
+{
+  CHAR8                 *Char;
+  UINTN                 RemainderLengthInThis;
+  UINTN                 LengthForCallback;
+  EFI_STATUS            Status;
+  HTTP_BODY_PARSER      *Parser;
+  
+  if (BodyLength == 0 || Body == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  if (MsgParser == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Parser = (HTTP_BODY_PARSER*) MsgParser;
+
+  if (Parser->IgnoreBody) {
+    Parser->State = BodyParserComplete;
+    if (Parser->Callback != NULL) {
+      Status = Parser->Callback (
+                 BodyParseEventOnComplete,
+                 Body,
+                 0,
+                 Parser->Context
+                 );
+      if (EFI_ERROR (Status)) {
+        return Status;
+      }
+    }
+    return EFI_SUCCESS;
+  }
+
+  if (Parser->State == BodyParserBodyStart) {
+    Parser->ParsedBodyLength = 0;
+    if (Parser->IsChunked) {
+      Parser->State = BodyParserChunkSizeStart;
+    } else {
+      Parser->State = BodyParserBodyIdentity;
+    }
+  }
+
+  //
+  // The message body might be truncated in anywhere, so we need to parse is byte-by-byte.
+  //
+  for (Char = Body; Char < Body + BodyLength; ) {
+
+    switch (Parser->State) {
+    case BodyParserStateMax:
+      return EFI_ABORTED;
+
+    case BodyParserComplete:
+      if (Parser->Callback != NULL) {
+        Status = Parser->Callback (
+                   BodyParseEventOnComplete,
+                   Char,
+                   0,
+                   Parser->Context
+                   );
+        if (EFI_ERROR (Status)) {
+          return Status;
+        }
+      }
+      return EFI_SUCCESS;
+    
+    case BodyParserBodyIdentity:
+      //
+      // Identity transfer-coding, just notify user to save the body data.
+      //
+      if (Parser->Callback != NULL) {
+        Status = Parser->Callback (
+                   BodyParseEventOnData,
+                   Char,
+                   MIN (BodyLength, Parser->ContentLength - Parser->ParsedBodyLength),
+                   Parser->Context
+                   );
+        if (EFI_ERROR (Status)) {
+          return Status;
+        }
+      }
+      Char += MIN (BodyLength, Parser->ContentLength - Parser->ParsedBodyLength);
+      Parser->ParsedBodyLength += MIN (BodyLength, Parser->ContentLength - Parser->ParsedBodyLength);
+      if (Parser->ParsedBodyLength == Parser->ContentLength) {
+        Parser->State = BodyParserComplete;
+      }
+      break;
+
+    case BodyParserChunkSizeStart:
+      //
+      // First byte of chunk-size, the chunk-size might be truncated.
+      //
+      Parser->CurrentChunkSize = 0;
+      Parser->State = BodyParserChunkSize;
+    case BodyParserChunkSize:
+      if (!NET_IS_HEX_CHAR (*Char)) {
+        if (*Char == ';') {
+          Parser->State = BodyParserChunkExtStart;
+          Char++;
+        } else if (*Char == '\r') {
+          Parser->State = BodyParserChunkSizeEndCR;
+          Char++;
+        } else {
+          Parser->State = BodyParserStateMax;
+        }
+        break;
+      }
+
+      if (Parser->CurrentChunkSize > (((~((UINTN) 0)) - 16) / 16)) {
+        return EFI_INVALID_PARAMETER;
+      }
+      Parser->CurrentChunkSize = Parser->CurrentChunkSize * 16 + HttpIoHexCharToUintn (*Char);
+      Char++;
+      break;
+
+    case BodyParserChunkExtStart:
+      //
+      // Ignore all the chunk extensions.
+      //
+      if (*Char == '\r') {
+        Parser->State = BodyParserChunkSizeEndCR;
+       }
+      Char++;
+      break;
+      
+    case BodyParserChunkSizeEndCR:
+      if (*Char != '\n') {
+        Parser->State = BodyParserStateMax;
+        break;
+      }
+      Parser->State = BodyParserChunkDataStart;
+      Parser->CurrentChunkParsedSize = 0;
+      Char++;
+      break;
+
+    case BodyParserChunkDataStart:
+      if (Parser->CurrentChunkSize == 0) {
+        //
+        // This is the last chunk, the trailer header is unsupported.
+        //
+        Parser->ContentLengthIsValid = TRUE;
+        Parser->State = BodyParserComplete;
+        break;
+      }
+      
+      //
+      // First byte of chunk-data, the chunk data also might be truncated.
+      //
+      RemainderLengthInThis = BodyLength - (Char - Body);
+      LengthForCallback = MIN (Parser->CurrentChunkSize - Parser->CurrentChunkParsedSize, RemainderLengthInThis);
+      if (Parser->Callback != NULL) {
+        Status = Parser->Callback (
+                   BodyParseEventOnData,
+                   Char,
+                   LengthForCallback,
+                   Parser->Context
+                   );
+        if (EFI_ERROR (Status)) {
+          return Status;
+        }
+      }
+      Char += LengthForCallback;
+      Parser->ContentLength += LengthForCallback;
+      Parser->CurrentChunkParsedSize += LengthForCallback;
+      if (Parser->CurrentChunkParsedSize == Parser->CurrentChunkSize) {
+        Parser->State = BodyParserChunkDataEnd;
+      }           
+      break;
+
+    case BodyParserChunkDataEnd:
+      if (*Char == '\r') {
+        Parser->State = BodyParserChunkDataEndCR;
+      } else {
+        Parser->State = BodyParserStateMax;
+      }
+      Char++;
+      break;
+
+    case BodyParserChunkDataEndCR:
+      if (*Char != '\n') {
+        Parser->State = BodyParserStateMax;
+        break;
+      }
+      Char++;
+      Parser->State = BodyParserChunkSizeStart;
+      break;     
+
+    default:
+      break;
+    }
+
+  }
+
+  if (Parser->State == BodyParserStateMax) {
+    return EFI_ABORTED;
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Check whether the message-body is complete or not.
+
+  @param[in]    MsgParser            Pointer to the message parser.
+
+  @retval TRUE                       Message-body is complete.
+  @retval FALSE                      Message-body is not complete.
+
+**/
+BOOLEAN
+EFIAPI
+HttpIsMessageComplete (
+  IN VOID              *MsgParser
+  )
+{
+  HTTP_BODY_PARSER      *Parser;
+
+  Parser = (HTTP_BODY_PARSER*) MsgParser;
+
+  if (Parser->State == BodyParserComplete) {
+    return TRUE;
+  }
+  return FALSE;
+}
+
+/**
+  Get the content length of the entity.
+
+  Note that in trunk transfer, the entity length is not valid until the whole message body is received.
+
+  @param[in]    MsgParser            Pointer to the message parser.
+  @param[out]   ContentLength        Pointer to store the length of the entity.
+
+  @retval EFI_SUCCESS                Successfully to get the entity length.
+  @retval EFI_NOT_READY              Entity length is not valid yet.
+  @retval EFI_INVALID_PARAMETER      MsgParser is NULL or ContentLength is NULL.
+  
+**/
+EFI_STATUS
+EFIAPI
+HttpGetEntityLength (
+  IN  VOID              *MsgParser,
+  OUT UINTN             *ContentLength
+  )
+{
+  HTTP_BODY_PARSER      *Parser;
+
+  if (MsgParser == NULL || ContentLength == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Parser = (HTTP_BODY_PARSER*) MsgParser;
+
+  if (!Parser->ContentLengthIsValid) {
+    return EFI_NOT_READY;
+  }
+
+  *ContentLength = Parser->ContentLength;
+  return EFI_SUCCESS;
+}
+
+/**
+  Release the resource of the message parser.
+
+  @param[in]    MsgParser            Pointer to the message parser.
+  
+**/
+VOID
+EFIAPI
+HttpFreeMsgParser (
+  IN  VOID           *MsgParser
+  )
+{
+  FreePool (MsgParser);
+}
diff --git a/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.inf b/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.inf
new file mode 100644
index 0000000000..382afe501a
--- /dev/null
+++ b/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.inf
@@ -0,0 +1,42 @@
+## @file
+#  It provides the helper routines to parse the HTTP message byte stream.
+#
+#  Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+#  This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD License
+#  which accompanies this distribution.  The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = DxeHttpLib
+  MODULE_UNI_FILE                = DxeHttpLib.uni
+  FILE_GUID                      = ABBAB4CD-EA88-45b9-8234-C8A7450531FC
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = HttpLib|DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SAL_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+
+[Sources]
+  DxeHttpLib.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib
+  UefiBootServicesTableLib
+  MemoryAllocationLib
diff --git a/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.uni b/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.uni
new file mode 100644
index 0000000000..806c443929
--- /dev/null
+++ b/MdeModulePkg/Library/DxeHttpLib/DxeHttpLib.uni