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創(chuàng)新互聯(lián)公司專業(yè)為企業(yè)提供臺安網(wǎng)站建設(shè)、臺安做網(wǎng)站、臺安網(wǎng)站設(shè)計、臺安網(wǎng)站制作等企業(yè)網(wǎng)站建設(shè)、網(wǎng)頁設(shè)計與制作、臺安企業(yè)網(wǎng)站模板建站服務，10年臺安做網(wǎng)站經(jīng)驗，不只是建網(wǎng)站，更提供有價值的思路和整體網(wǎng)絡(luò)服務。
找一個網(wǎng)頁，內(nèi)容含有顯示瀏覽者ip的網(wǎng)址。抓該網(wǎng)頁的內(nèi)容分析獲取外網(wǎng)的字串。
提供一個安全網(wǎng)址給你：
是APNIC亞洲數(shù)據(jù)中心的首頁 的子頁
vb 如何獲取外網(wǎng)ip代碼：
'獲取公網(wǎng)IP
Private Declare Function InternetOpen Lib "wininet.dll" Alias "InternetOpenA" ( _
ByVal sAgent As String, ByVal lAccessType As Long, _
ByVal sProxyName As String, ByVal sProxyBypass As String, _
ByVal lFlags As Long) As Long
Private Declare Function InternetOpenUrl Lib "wininet.dll" Alias "InternetOpenUrlA" ( _
ByVal hInternetSession As Long, ByVal sUrl As String, _
ByVal sHeaders As String, ByVal lHeadersLength As Long, _
ByVal lFlags As Long, ByVal lContext As Long) As Long
Private Declare Function InternetReadFile Lib "wininet.dll" ( _
ByVal hFile As Long, ByVal sBuffer As String, _
ByVal lNumBytesToRead As Long, _
lNumberOfBytesRead As Long) As Integer
Private Declare Function InternetCloseHandle Lib "wininet.dll" ( _
ByVal hInet As Long) As Integer
Private Const INTERNET_FLAG_NO_CACHE_WRITE = H4000000
Private Declare Function URLDownloadToFile Lib "urlmon" Alias "URLDownloadToFileA" (ByVal pCaller As Long, ByVal szURL As String, ByVal szFileName As String, ByVal dwReserved As Long, ByVal lpfnCB As Long) As Long
Public Function GetSub() As String
Dim wburl$, wburl2$, X1, X2, X3, X4
On Error GoTo err
wburl = ""
wburl = GetUrlFile(wburl)
If InStr(1, wburl, "無法找到該頁") = 0 Then
X1 = InStr(1, wburl, "[")
X2 = InStr(1, wburl, "]")
X1 = Mid(wburl, X1, X2 - X1)
X1 = Replace(X1, "[", "")
X1 = Replace(X1, " ", "")
X1 = Replace(X1, vbCrLf, "")
GetSub = X1
Exit Function
End If
wburl2 = ""
wburl2 = GetUrlFile(wburl2)
If InStr(1, wburl2, "無法找到該頁") = 0 Then
X3 = InStr(1, wburl2, "h2")
X4 = InStr(1, wburl2, "/h2")
X3 = Mid(wburl2, X3, X4 - X3)
X3 = Replace(X3, "h2", "")
X3 = Replace(X3, " ", "")
X3 = Replace(X3, vbCrLf, "")
GetSub = X3
Exit Function
Else
GetSub = "127.0.0.1"
End If
err:
GetSub = "127.0.0.1"
End Function
Private Function GetUrlFile(stUrl As String) As String
Dim lgInternet As Long, lgSession As Long
Dim stBuf As String * 1024
Dim inRes As Integer
Dim lgRet As Long
Dim stTotal As String
stTotal = vbNullString
lgSession = InternetOpen("VBTagEdit", 1, vbNullString, vbNullString, 0)
If lgSession Then
lgInternet = InternetOpenUrl(lgSession, stUrl, vbNullString, _
0, INTERNET_FLAG_NO_CACHE_WRITE, 0)
If lgInternet Then
Do
inRes = InternetReadFile(lgInternet, stBuf, 1024, lgRet)
stTotal = stTotal Mid$(stBuf, 1, lgRet)
Loop While (lgRet 0)
End If
inRes = InternetCloseHandle(lgInternet)
End If
GetUrlFile = stTotal
End Function
使用方法：
在form中調(diào)用GetSub就行了。
List1.AddItem ("公網(wǎng)IP:" GetSub + "..")。
Private?Sub?WebBrowser1_DocumentCompleted(ByVal?sender?As?Object,?ByVal?e?As?System.Windows.Forms.WebBrowserDocumentCompletedEventArgs)?Handles?WebBrowser1.DocumentCompleted
Dim?str?As?String
str?=?Me.WebBrowser1.Document.Body.InnerHtml
Dim?a?As?Integer?=?0
Dim?b?As?Integer?=?0
a?=?InStr(str,?"[")
b?=?InStr(str,?"]")
TextBox1.Text?=?Mid(str,?a?+?1,?b?-?a?-?1)
End?Sub
Private?Sub?Form1_Load(ByVal?sender?As?Object,?ByVal?e?As?System.EventArgs)?Handles?Me.Load
Me.WebBrowser1.Navigate("
)
End?Sub
End?Class
網(wǎng)頁上顯示的有點問題，form1_load 中代碼是：Me.WebBrowser1.Navigate("")
原理：訪問查IP網(wǎng)頁后，獲取網(wǎng)頁上顯示的本機外網(wǎng)ip地址
vb中從域名得到IP及從IP得到域名
Private Const WS_VERSION_REQD = H101
Private Const WS_VERSION_MAJOR = WS_VERSION_REQD H100 And HFF
Private Const WS_VERSION_MINOR = WS_VERSION_REQD And HFF
Private Const MIN_SOCKETS_REQD = 1
Private Const SOCKET_ERROR = -1
Private Const WSADescription_Len = 256
Private Const WSASYS_Status_Len = 128
Private Type HOSTENT
hname As Long
hAliases As Long
hAddrType As Integer
hLength As Integer
hAddrList As Long
End Type
Private Type WSADATA
wversion As Integer
wHighVersion As Integer
szDescription(0 To WSADescription_Len) As Byte
szSystemStatus(0 To WSASYS_Status_Len) As Byte
iMaxSockets As Integer
iMaxUdpDg As Integer
lpszVendorInfo As Long
End Type
Private Declare Function gethostbyaddr Lib "WSOCK32.DLL" (addr As Any, ByVal _
byteslen As Integer, addrtype As Integer) As Long
Private Declare Function WSAGetLastError Lib "WSOCK32.DLL" () As Long
Private Declare Function WSAStartup Lib "WSOCK32.DLL" (ByVal _
wVersionRequired, lpWSAData As WSADATA) As Long
Private Declare Function WSACleanup Lib "WSOCK32.DLL" () As Long
Private Declare Function gethostbyname Lib "WSOCK32.DLL" (ByVal _
hostname$) As Long
Private Declare Sub RtlMoveMemory Lib "KERNEL32" (hpvDest As Any, _
ByVal hpvSource, ByVal cbCopy)
Function hibyte(ByVal wParam As Integer) ? ?注釋：獲得整數(shù)的高位
hibyte = wParam H100 And HFF
End Function
Function lobyte(ByVal wParam As Integer) ? ?注釋：獲得整數(shù)的低位
lobyte = wParam And HFF
End Function
Function SocketsInitialize()
Dim WSAD As WSADATA
Dim iReturn As Integer
Dim sLowByte As String, sHighByte As String, sMsg As String
iReturn = WSAStartup(WS_VERSION_REQD, WSAD)
If iReturn 0 Then
MsgBox "Winsock.dll 沒有反應."
End
End If
If lobyte(WSAD.wversion) WS_VERSION_MAJOR Or (lobyte(WSAD.wversion) = WS_VERSION_MAJOR And hibyte(WSAD.wversion) WS_VERSION_MINOR) Then
sHighByte = Trim$(str$(hibyte(WSAD.wversion)))
sLowByte = Trim$(str$(lobyte(WSAD.wversion)))
sMsg = "Windows Sockets版本 " sLowByte "." sHighByte
sMsg = sMsg " 不被winsock.dll支持 "
MsgBox sMsg
End
End If
If WSAD.iMaxSockets MIN_SOCKETS_REQD Then
sMsg = "這個系統(tǒng)需要的最少Sockets數(shù)為 "
sMsg = sMsg Trim$(str$(MIN_SOCKETS_REQD))
MsgBox sMsg
End
End If
End Function
Sub SocketsCleanup()
Dim lReturn As Long
lReturn = WSACleanup()
If lReturn 0 Then
MsgBox "Socket錯誤 " Trim$(str$(lReturn)) " occurred in Cleanup "
End
End If
End Sub
Sub Form_Load()
注釋：初始化Socket
SocketsInitialize
End Sub
Private Sub Form_Unload(Cancel As Integer)
注釋：清除Socket
SocketsCleanup
End Sub
Private Function getip(name As String) As String
Dim hostent_addr As Long
Dim host As HOSTENT
Dim hostip_addr As Long
Dim temp_ip_address() As Byte
Dim i As Integer
Dim ip_address As String
hostent_addr = gethostbyname(name)
If hostent_addr = 0 Then
getip = "" ? ? ? ? ? ? ? ? ? ?注釋：主機名不能被解釋
Exit Function
End If
RtlMoveMemory host, hostent_addr, LenB(host)
RtlMoveMemory hostip_addr, host.hAddrList, 4
ReDim temp_ip_address(1 To host.hLength)
RtlMoveMemory temp_ip_address(1), hostip_addr, host.hLength
For i = 1 To host.hLength
ip_address = ip_address temp_ip_address(i) "."
Next
ip_address = Mid$(ip_address, 1, Len(ip_address) - 1)
getip = ip_address
End Function
Private Sub Command1_click()
Dim str As String
str = getip(Text1.Text)
If str = "" Then
Text2.Text = "主機名不能被解釋"
Else
Text2.Text = str
End If
End Sub
Private Function getname(addrstr As String) As String
Dim hostent_addr As Long
Dim host As HOSTENT
Dim addr(0 To 50) As Byte
Dim addrs As String
Dim hname(1 To 50) As Byte
Dim str As String
Dim i As Integer, j As Integer
Dim temp_int As Integer
Dim byt As Byte
str = Trim$(addrstr)
i = 0
j = 0
Do
temp_int = 0
i = i + 1
Do While Mid$(str, i, 1) = "0" And Mid$(str, i, 1) = "9" And i = Len(str)
temp_int = temp_int * 10 + Mid$(str, i, 1)
i = i + 1
Loop
If temp_int = 255 Then
addr(j) = temp_int
j = j + 1
End If
Loop Until Mid$(str, i, 1) "." Or i Len(str) Or temp_int 255
If temp_int 255 Then
getname = "地址非法"
Exit Function
End If
hostent_addr = gethostbyaddr(addr(0), j, 2)
If hostent_addr = 0 Then
getname = "此地址無法解析"
Exit Function
End If
RtlMoveMemory host, hostent_addr, LenB(host)
RtlMoveMemory hname(1), host.hname, 50
j = 51
For i = 1 To 50
If hname(i) = 0 Then
j = i
End If
If i = j Then
hname(i) = 32
End If
Next i
getname = Trim$(StrConv(hname, vbUnicode))
End Function
Private Sub Command2_Click()
Dim name As String
name = getname(Text2.Text)
If name = "" Then
name = "此地址沒有域名"
End If
Text1.Text = name
End Sub
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