' The possible values for the lInfoLevel parameter include:
Public Const HTTP_QUERY_CONTENT_TYPE = 1
Public Const HTTP_QUERY_CONTENT_LENGTH = 5
Public Const HTTP_QUERY_EXPIRES = 10
Public Const HTTP_QUERY_LAST_MODIFIED = 11
Public Const HTTP_QUERY_PRAGMA = 17
Public Const HTTP_QUERY_VERSION = 18
Public Const HTTP_QUERY_STATUS_CODE = 19
Public Const HTTP_QUERY_STATUS_TEXT = 20
Public Const HTTP_QUERY_RAW_HEADERS = 21
Public Const HTTP_QUERY_RAW_HEADERS_CRLF = 22
Public Const HTTP_QUERY_FORWARDED = 30
Public Const HTTP_QUERY_SERVER = 37
Public Const HTTP_QUERY_USER_AGENT = 39
Public Const HTTP_QUERY_SET_COOKIE = 43
Public Const HTTP_QUERY_REQUEST_METHOD = 45
Public Const HTTP_STATUS_DENIED = 401
Public Const HTTP_STATUS_PROXY_AUTH_REQ = 407
' Add this flag to the about flags to get request header.
Public Const HTTP_QUERY_FLAG_REQUEST_HEADERS = &H80000000
Public Const HTTP_QUERY_FLAG_NUMBER = &H20000000
' Reads data from a handle opened by the HttpOpenRequest function.
Public Declare Function InternetReadFile Lib "wininet.dll" _
(ByVal hFile As Long, ByVal sBuffer As String, ByVal lNumBytesToRead As Long, _
lNumberOfBytesRead As Long) As Integer
Public Declare Function InternetWriteFile Lib "wininet.dll" _
(ByVal hFile As Long, ByVal sBuffer As String, _
ByVal lNumberOfBytesToRead As Long, _
lNumberOfBytesRead As Long) As Integer
Public Declare Function FtpOpenFile Lib "wininet.dll" Alias _
"FtpOpenFileA" (ByVal hFtpSession As Long, _
ByVal sFileName As String, ByVal lAccess As Long, _
ByVal lFlags As Long, ByVal lContext As Long) As Long
Public Declare Function FtpDeleteFile Lib "wininet.dll" _
Alias "FtpDeleteFileA" (ByVal hFtpSession As Long, _
ByVal lpszFileName As String) As Boolean
Public Declare Function InternetSetOption Lib "wininet.dll" Alias "InternetSetOptionA" _
(ByVal hInternet As Long, ByVal lOption As Long, ByRef sBuffer As Any, ByVal lBufferLength As Long) As Integer
Public Declare Function InternetSetOptionStr Lib "wininet.dll" Alias "InternetSetOptionA" _
(ByVal hInternet As Long, ByVal lOption As Long, ByVal sBuffer As String, ByVal lBufferLength As Long) As Integer
' Closes a single Internet handle or a subtree of Internet handles.
Public Declare Function InternetCloseHandle Lib "wininet.dll" _
(ByVal hInet As Long) As Integer
' Queries an Internet option on the specified handle
Public Declare Function InternetQueryOption Lib "wininet.dll" Alias "InternetQueryOptionA" _
(ByVal hInternet As Long, ByVal lOption As Long, ByRef sBuffer As Any, ByRef lBufferLength As Long) As Integer
' Returns the version number of Wininet.dll.
Public Const INTERNET_OPTION_VERSION = 40
' Contains the version number of the DLL that contains the Windows Internet
' functions (Wininet.dll). This structure is used when passing the
' INTERNET_OPTION_VERSION flag to the InternetQueryOption function.
Public Type tWinInetDLLVersion
lMajorVersion As Long
lMinorVersion As Long
End Type
' Adds one or more HTTP request headers to the HTTP request handle.
Public Declare Function HttpAddRequestHeaders Lib "wininet.dll" Alias "HttpAddRequestHeadersA" _
(ByVal hHttpRequest As Long, ByVal sHeaders As String, ByVal lHeadersLength As Long, _
ByVal lModifiers As Long) As Integer
' Flags to modify the semantics of this function. Can be a combination of these values:
' Adds the header only if it does not already exist; otherwise, an error is returned.
Public Const HTTP_ADDREQ_FLAG_ADD_IF_NEW = &H10000000
' Adds the header if it does not exist. Used with REPLACE.
Public Const HTTP_ADDREQ_FLAG_ADD = &H20000000
' Replaces or removes a header. If the header value is empty and the header is found,
' it is removed. If not empty, the header value is replaced
Public Const HTTP_ADDREQ_FLAG_REPLACE = &H80000000
'
'
'Módulo para el manejo de errores de wininet
'
Declare Function FormatMessage _
Lib "kernel32" Alias "FormatMessageA" _
(ByVal dwFlags As Long, _
lpSource As Any, _
ByVal dwMessageId As Long, _
ByVal dwLanguageId As Long, _
ByVal lpBuffer As String, _
ByVal nSize As Long, _
Arguments As Long) As Long
Declare Function GetModuleHandle Lib "kernel32" Alias "GetModuleHandleA" (ByVal lpModuleName As String) As Long
Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (ByVal lpLibFileName As String) As Long
Declare Function FreeLibrary Lib "kernel32" (ByVal hLibModule As Long) As Long
2.- crea esta función
Public Function Validahttp(URL As String) As Integer
Validahttp = 0
'Verifica si existe una direccion de http de internet
'Adrián Lago
If InternetCheckConnection(URL, FLAG_ICC_FORCE_CONNECTION, 0&) = 0 Then
Validahttp = 0
Else
Validahttp = 1
End If
End Function
3. - En el ASP
'Desclaracion del DLL
Set MiDll = Server.CreateObject("Mi_Dll.Utils")
'Correo a validar
Correo = "
[email protected]"
'Convertir el correo a dominio
Dominio = "http://www."&mid(Correo ,instr(Correo,"@")+1, len(Correo)-instr(Correo ,"@"))
'Verificar que exista el dominio
dominiovalido = MiDll.Validahttp (Dominio)
if dominiovalido = 1 then
response.write "El dominio " & Dominio & " Es válido"
else
response.write "El dominio " & Dominio & " no existe, verifique que lo ha escrito correctamente"
end if
Espero que te sea de utilidad
para seguir donde se queda colgado y es precisamente en la ejecución del comando nslookup (pueden ver la linea en ROJO).
