怎样利用向一个ASP网页中的提交数据--即模拟表单发送的效果?

梦想成了相扑 2003-10-17 09:45:45

【yunfeng007(一水寒)】给过一种方法－－vb调用winInet API接口post数据到指定的url，但小弟没有用明白啊：

''This module is called modWinInet.bas. Use the SplitAddr() function to get the address in the correct format for PostInfo.

Option Explicit

''Author: Sam Huggill
''Email: sam@vbsquare.com

Private Declare Function InternetOpen Lib "wininet.dll" _
Alias "InternetOpenA" _
(ByVal lpszCallerName As String, _
ByVal dwAccessType As Long, _
ByVal lpszProxyName As String, _
ByVal lpszProxyBypass As String, _
ByVal dwFlags As Long) As Long

Private Declare Function InternetConnect Lib "wininet.dll" _
Alias "InternetConnectA" _
(ByVal hInternetSession As Long, _
ByVal lpszServerName As String, _
ByVal nProxyPort As Integer, _
ByVal lpszUsername As String, _
ByVal lpszPassword As String, _
ByVal dwService As Long, _
ByVal dwFlags As Long, _
ByVal dwContext 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 HttpOpenRequest Lib "wininet.dll" _
Alias "HttpOpenRequestA" _
(ByVal hInternetSession As Long, _
ByVal lpszVerb As String, _
ByVal lpszObjectName As String, _
ByVal lpszVersion As String, _
ByVal lpszReferer As String, _
ByVal lpszAcceptTypes As Long, _
ByVal dwFlags As Long, _
ByVal dwContext As Long) As Long

Private Declare Function HttpSendRequest Lib "wininet.dll" _
Alias "HttpSendRequestA" _
(ByVal hHttpRequest As Long, _
ByVal sHeaders As String, _
ByVal lHeadersLength As Long, _
ByVal sOptional As String, _
ByVal lOptionalLength As Long) As Boolean

Private Declare Function InternetCloseHandle Lib "wininet.dll" _
(ByVal hInternetHandle As Long) As Boolean

Private 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

Public Function PostInfo$(srv$, port$, script$, postdat$)

Dim hInternetOpen As Long
Dim hInternetConnect As Long
Dim hHttpOpenRequest As Long
Dim bRet As Boolean

hInternetOpen = 0
hInternetConnect = 0
hHttpOpenRequest = 0

''Use registry access settings.
Const INTERNET_OPEN_TYPE_PRECONFIG = 0
hInternetOpen = InternetOpen("http generic", _
INTERNET_OPEN_TYPE_PRECONFIG, _
vbNullString, _
vbNullString, _
0)

If hInternetOpen <> 0 Then
''Type of service to access.
Const INTERNET_SERVICE_HTTP = 3
Const INTERNET_DEFAULT_HTTP_PORT = 80
''Change the server to your server name
hInternetConnect = InternetConnect(hInternetOpen, _
srv$, _
port$, _
vbNullString, _
"HTTP/1.0", _
INTERNET_SERVICE_HTTP, _
0, _
0)

If hInternetConnect <> 0 Then
''Brings the data across the wire even if it locally cached.
Const INTERNET_FLAG_RELOAD = &H80000000
hHttpOpenRequest = HttpOpenRequest(hInternetConnect, _
"POST", _
script$, _
"HTTP/1.0", _
vbNullString, _
0, _
INTERNET_FLAG_RELOAD, _
0)

If hHttpOpenRequest <> 0 Then
Dim sHeader As String
Const HTTP_ADDREQ_FLAG_ADD = &H20000000
Const HTTP_ADDREQ_FLAG_REPLACE = &H80000000
sHeader = "Content-Type: application/x-www-form-urlencoded" _
& vbCrLf
bRet = HttpAddRequestHeaders(hHttpOpenRequest, _
sHeader, Len(sHeader), HTTP_ADDREQ_FLAG_REPLACE _
Or HTTP_ADDREQ_FLAG_ADD)

Dim lpszPostData As String
Dim lPostDataLen As Long

lpszPostData = postdat$
lPostDataLen = Len(lpszPostData)
bRet = HttpSendRequest(hHttpOpenRequest, _
vbNullString, _
0, _
lpszPostData, _
lPostDataLen)

Dim bDoLoop As Boolean
Dim sReadBuffer As String * 2048
Dim lNumberOfBytesRead As Long
Dim sBuffer As String
bDoLoop = True
While bDoLoop
sReadBuffer = vbNullString
bDoLoop = InternetReadFile(hHttpOpenRequest, _
sReadBuffer, Len(sReadBuffer), lNumberOfBytesRead)
sBuffer = sBuffer & _
Left(sReadBuffer, lNumberOfBytesRead)
If Not CBool(lNumberOfBytesRead) Then bDoLoop = False
Wend
PostInfo = sBuffer
bRet = InternetCloseHandle(hHttpOpenRequest)
End If
bRet = InternetCloseHandle(hInternetConnect)
End If
bRet = InternetCloseHandle(hInternetOpen)
End If
End Function

Public Sub SplitAddr(ByVal addr$, srv$, script$)
''Inputs: The full url including http://
'' Two variables that will be changed
''
''Returns: Splits the addr$ var into the server name
'' and the script path

Dim i%

i = InStr(addr$, "/")
srv$ = Mid(addr$, i + 2, Len(addr$) - (i + 1))
i = InStr(srv$, "/")
script$ = Mid(srv$, i, Len(srv$) + 1 - i)
srv$ = Left$(srv$, i - 1)

End Sub

...全文