vb调用winInet API接口post数据到指定的url

王朝vb·作者佚名  2006-01-08
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源代码推荐:vb调用winInet API接口post数据到指定的url

'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

 
 
 
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