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| Option Explicit
Private Const INTERNET_OPEN_TYPE_PRECONFIG = 0
Private Const INTERNET_OPEN_TYPE_DIRECT = 1
Private Const INTERNET_OPEN_TYPE_PROXY = 3
Private Const scUserAgent = "VB OpenUrl"
Private Const INTERNET_FLAG_RELOAD = &H80000000
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 hOpen As Long, ByVal sUrl As String, ByVal sHeaders As String, _
ByVal lLength 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 Function VerifFichierExist(Url As String) As Boolean
Dim hOpen As Long
Dim hOpenUrl As Long
Dim sUrl As String
Dim bDoLoop As Boolean
Dim bRet As Boolean
Dim sReadBuffer As String * 2048
Dim lNumberOfBytesRead As Long
Dim sBuffer As String
sUrl = Url
hOpen = InternetOpen(scUserAgent, INTERNET_OPEN_TYPE_DIRECT, vbNullString, vbNullString, 0)
hOpenUrl = InternetOpenUrl(hOpen, sUrl, vbNullString, 0, INTERNET_FLAG_RELOAD, 0)
bDoLoop = True
While bDoLoop
sReadBuffer = vbNullString
bRet = InternetReadFile(hOpenUrl, sReadBuffer, Len(sReadBuffer), lNumberOfBytesRead)
sBuffer = sBuffer & Left$(sReadBuffer, lNumberOfBytesRead)
If Not CBool(lNumberOfBytesRead) Then bDoLoop = False
Wend
If hOpenUrl <> 0 Then InternetCloseHandle (hOpenUrl)
If hOpen <> 0 Then InternetCloseHandle (hOpen)
If InStr(sBuffer, "404 Not Found") Then VerifFichierExist = False Else VerifFichierExist = True
End Function
Private Sub Form_Load()
MsgBox "Fichier 1029322z.jpg trouvé = " & VerifFichierExist("https://www.cvs-mediatheques.com/home/notices/0/322/1029322z.jpg")
MsgBox "Fichier nexistepas.jpg trouvé = " & VerifFichierExist("https://www.cvs-mediatheques.com/home/notices/0/322/nexistepas.jpg")
End Sub |
