在公司做ERP系统开发时,由于客户端数量大多,软件经常需要修改,每次都去手动更新客户端太麻烦,为了不再去手工做这么烦锁的事情,客户端就可以自动更新程序为最新版本,同时还要通过系统防毒软件和防火墙。。。
需求分析:
1.客户端每次运行系统时有新版本需要更新,要提示更新
2.有多个DLL,OCX,EXE文件需要更新,需要打包
3.要跟据要求安装到指定目录并注册
程序设计方法:
1. 首先,需要安排一台FTP服务器用于提供更新包下载服务
2. 打包需要安装的程序,采用VB6.0自带的CAB打包工具 MAKECAB.EXE ,把需要安装的程序文件名字写入一个 *.DDF 里,例如我做的这个文件 cesupdate.DDF 内容如下:
.OPTION EXPLICIT .Set Cabinet=off .Set Compress=off .Set MaxDiskSize=CDROM .Set ReservePerCabinetSize=6144 .Set DiskDirectoryTemplate=".." .Set CompressionType=MSZIP .Set CompressionLevel=7 .Set CompressionMemory=21 .Set CabinetNameTemplate="update_CN.cab" .Set Cabinet=on .Set Compress=on "prjTest.exe" "CESUpgrade.exe" "CESCommon.dll" "CESToolLib.dll" "CESTOOL.dll" "CESQMLib.dll" "CESQM.dll" "CESPMLib.dll" "CESPM.dll" "CESPLANLib.dll" "CESPLAN.dll" "CESBMLib.dll" "CESBM.dll" "cesupdate.txt"
3. 运行一个这个命令 MAKECAB.EXE /f "cesupdate.DDF" 就可以打包成 update_CN.cab
4. 打包程序里面包含一个安装配置文件 cesupdate.txt 用于指定程序安装到什么位置,可以参考VB6.0的SETUP程序源码,此文件内容如下:
prjTest.exe,$(APPPATH) CESUpgrade.exe,$(APPPATH)/Dlls/ CESCommon.dll,$(APPPATH)/Dlls/ CESPLAN.dll,$(APPPATH)/Dlls/ CESPLANLib.dll,$(APPPATH)/Dlls/ CESPM.dll,$(APPPATH)/Dlls/ CESPMLib.dll,$(APPPATH)/Dlls/ CESQM.dll,$(APPPATH)/Dlls/ CESQMLib.dll,$(APPPATH)/Dlls/ CESToolLib.dll,$(APPPATH)/Dlls/ CESTOOL.dll,$(APPPATH)/Dlls/ CESBM.dll,$(APPPATH)/Dlls/ CESBMLib.dll,$(APPPATH)/Dlls/
5. 在FTP服务器里面放上 update.txt,此文件用于记录版本号和服务包,每次有程序需要更新时只需替换更新包,改动这面的版本号就行了,此文件内容如下:
VER=V1-0-0080 ' 版本号 URL=update_CN.cab ‘更新包
6. 在主程序里面加入如下代码用于比较程序版本号 Private Declare Function ShellExecute Lib "shell32" Alias "ShellExecuteA" (ByVal hwnd As Long,ByVal lpOperation As String,ByVal lpFile As String,ByVal lpParameters As String,ByVal lpDirectory As String,ByVal nShowCmd As Long) As Long
'Winsock Dim hSock As Integer Dim bBytes As Integer Dim gPackVer As String Dim gPackFile As String
Private Sub MDIForm_MouseUp(Button As Integer,Shift As Integer,x As Single,y As Single) Dim ServerResponse As String Dim MsgBuffer As String * 8192 Dim a() As String
On Error Resume Next
'A Socket is open If hSock > 0 Then 'Receive up to 8192 chars bBytes = recv(hSock,ByVal MsgBuffer,8192,0) If bBytes > 0 Then ServerResponse = Mid$(MsgBuffer,1,bBytes) a = Split(MsgBuffer,Chr(13) & Chr(10)) 'Debug.Print a(1) gPackVer = Trim(Mid(a(0),6)) gPackFile = Trim(Mid(a(1),6)) If gUpdatePackVer <> gPackVer Then If MsgBox("系统获取到有一个服务更新包需要更新,版本号为:" & gPackVer & vbCrLf & " 您需要更新系统吗?",vbYesNo) = vbYes Then closesocket (hSock) Call EndWinsock 'Very important! hSock = 0 ShellExecute 0,vbNullString,App.Path & "/CESUpgrade.exe ",gPackVer & " " & gPackFile,vbNormalFocus End Else closesocket (hSock) Call EndWinsock 'Very important! hSock = 0 End If End If '0 Bytes received,close sock to indicate end of receive ElseIf WSAGetLastError() <> WSAEWOULDBLOCK Then closesocket (hSock) Call EndWinsock 'Very important! hSock = 0 End If End If End Sub
Private Sub sbStatus_PanelClick(ByVal Panel As MSComctlLib.Panel) GetfromInet gUpdatePackUrl & "update.txt" End Sub
Private Sub GetfromInet(strURL As String,Optional strProxy As String) Dim SocketBuffer As sockaddr Dim IpAddr As Long Dim SlashPos As Integer Dim strPath As String Dim strHost As String Dim tmpHost As String Dim intPort As Integer Dim RC As Long Dim strMsg As String 'Separate URL into Host and Path SlashPos = InStr(8,strURL,"/") If SlashPos = 0 Then SlashPos = Len(strURL) + 1 strPath = Mid$(strURL,SlashPos) If strPath = "" Then strPath = "/" strHost = Mid$(strURL,8,SlashPos - 8)
If strProxy <> "" Then 'There is a Proxy tmpHost = "http://" & strHost strHost = Mid$(strProxy,InStr(1,strProxy,":") - 1) intPort = CInt(Mid$(strProxy,":") + 1)) Else 'No Proxy intPort = 80 End If
'Start winsock Call StartWinsock
'Create socket hSock = socket(AF_INET,SOCK_STREAM,0) If hSock = SOCKET_ERROR Then Exit Sub
IpAddr = GetHostByNameAlias(strHost) If IpAddr = -1 Then 'Err.Raise vbObjectError + 1,"Unknown host" Exit Sub End If With SocketBuffer .sin_family = AF_INET .sin_port = htons(intPort) .sin_addr = IpAddr .sin_zero = String$(8,0) End With DoEvents 'Connect to server RC = connect(hSock,SocketBuffer,Len(SocketBuffer)) If RC = SOCKET_ERROR Then closesocket hSock Call EndWinsock Err.Raise vbObjectError + 1,"Could not connect to " & strHost Exit Sub Else End If DoEvents
'Set receive window RC = WSAAsyncSelect(hSock,Me.hwnd,ByVal &H202,ByVal FD_READ Or FD_CLOSE) If RC = SOCKET_ERROR Then closesocket hSock Call EndWinsock Exit Sub End If 'Prepare GET header 'When to use GET? -> When the amount of data that you 'need to pass to the server is not much strMsg = "GET " & tmpHost & strPath & " HTTP/1.0" & vbCrLf strMsg = strMsg & "Accept: */*" & vbCrLf ' strMsg = strMsg & "Accept-Language: zh-cn" & vbCrLf ' strMsg = strMsg & "Accept-Encoding: gzip,deflate" & vbCrLf strMsg = strMsg & "User-Agent: " & App.Title & vbCrLf strMsg = strMsg & "Host: " & strHost & vbCrLf strMsg = strMsg & vbCrLf ' lblStatus = "Sending request..." DoEvents 'Send request SendData hSock,strMsg If tmpHost = "" Then tmpHost = strHost 'Wait for page to be downloaded 'Seconds to wait = 10 Dim Start As Integer Start = (Format$(Now,"NN") * 60 + Format$(Now,"SS")) + 10 While Not Start <= (Format$(Now,"SS")) And hSock > 0 'hlblStatus = "Waiting for response from " & tmpHost & "..." & Start - (Format$(Now,"SS")) DoEvents Wend End Sub
7. 最后制做自动更新程序 CESUpgrade.exe
这是更新程序最主要的部分,需要做如下几件事情: (1)下载FTP服务器服务更新包 update_CN.cab
(2)将下载的服务更新包解压到TEMP目录
(3)读取安装配置文件 cesupdate.txt ,并复制安装到指定位置
(4)对DLL,OCX文件注册,这一点可能并不重要
完毕 (编辑:李大同)
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