VB获取IE缓存内指定的URL
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发布时间：2023-09-23 22:16
共2个回答
热心网友
时间：2024-11-01 17:36
Private Const ERROR_INSUFFICIENT_BUFFER = 122
Private Const eeErrorBase = 26720
Private Type FILETIME
dwLowDateTime As Long
dwHighDateTime As Long
End Type
Private Type INTERNET_CACHE_ENTRY_INFO
dwStructSize As Long
lpszSourceUrlName As String
lpszLocalFileName As String
CacheEntryType As String
dwUseCount As Long
dwHitRate As Long
dwSizeLow As Long
dwSizeHigh As Long
LastModifiedTime As FILETIME
ExpireTIme As FILETIME
LastAccessTime As FILETIME
LastSyncTime As FILETIME
lpHeaderInfo As Long
dwHeaderInfoSize As Long
lpszFileExtension As String
dwReserved As Long
End Type
Private Declare Function GetUrlCacheEntryInfo Lib "wininet.dll" _
Alias "GetUrlCacheEntryInfoA" (ByVal sUrlName As String, _
lpCacheEntryInfo As Any, lpdwCacheEntryInfoBufferSize _
As Long) As Long
'用来报告API产生的错误：
Private Const FORMAT_MESSAGE_ALLOCATE_BUFFER = &H100
Private Const FORMAT_MESSAGE_ARGUMENT_ARRAY = &H2000
Private Const FORMAT_MESSAGE_FROM_HMODULE = &H800
Private Const FORMAT_MESSAGE_FROM_STRING = &H400
Private Const FORMAT_MESSAGE_FROM_SYSTEM = &H1000
Private Const FORMAT_MESSAGE_IGNORE_INSERTS = &H200
Private Const FORMAT_MESSAGE_MAX_WIDTH_MASK = &HFF
Private 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
Public Function WinAPIError(ByVal lLastDLLError As Long) As String
Dim sBuff As String
Dim lCount As Long
'返回与LastDLLError相关的出错信息：
sBuff = String$(256, 0)
lCount = FormatMessage( _
FORMAT_MESSAGE_FROM_SYSTEM Or FORMAT_MESSAGE_IGNORE_INSERTS, _
0, lLastDLLError, 0&, sBuff, Len(sBuff), ByVal 0)
If lCount Then
WinAPIError = Left$(sBuff, lCount)
End If
End Function
Public Function GetCacheEntryInfo(ByVal hWnd As Long, _
ByVal lpszUrl As String) As Boolean
Dim dwEntrySize As Long
Dim lpCacheEntry As INTERNET_CACHE_ENTRY_INFO
Dim dwTemp As Long
Dim lErr As Long
If (GetUrlCacheEntryInfo(lpszUrl, ByVal 0&, dwEntrySize)) = 0 Then
lErr = Err.LastDllError
If (lErr <> ERROR_INSUFFICIENT_BUFFER) Then
'预料外的错误。须要显示出错原因：
Err.Raise eeErrorBase + 1, _
App.EXEName & ".mCacheEntry", WinAPIError(lErr)
GetCacheEntryInfo = False
Exit Function
Else
'这是预料中的错误
GetCacheEntryInfo = True
End If
End If
End Function
在窗体上添加一个Command和一个Text。然后加入这些代码：
Option Explicit
Private Sub Command1_Click()
On Error Goto ErrorHandler
'检查Text中的URL地址是否出现在缓存中：
If (GetCacheEntryInfo(Me.hWnd, Text1.Text)) Then
MsgBox "URL In Cache.", vbInformation
Else
MsgBox "URL Not In Cache.", vbInformation
End If
Exit Sub
ErrorHandler:
MsgBox "URL Not in Cache [" & Err.Description & "]",vbInformation
End Sub
你参考一下吧追问汗，这个是搜索完整的URL是否存在IE缓存中的代码，网上到处都是。
只能确认文件是否存在，而且只查询一次，如果有重复的URL不会继续搜索。
而且看问题，前三步我已经做到了。
参考资料：http://www.programfan.com/club/showpost.asp?id=48765&t=o
热心网友
时间：2024-11-01 17:37
