//下面的代码既是服务器又是客户端 'Author:Dah 'Coded time:2000.11.10 //y.m.d 'Usage:transfer a file to another pc through intranet with winsock power Option Explicit Dim mybyte() As Byte '发送方数组 Const filecomesMSG = "a file is coming " '有文件到来 Const RemoteIsReadyMSG = "I'm ready " '准备好了 Const FileisOverMSG = "the file is ended" '文件完毕 Const RemoteDenyMSG = "the user canceled" Const filecountMSG = "the file lengh is" Dim arrdata() As Byte '收到的信息 Dim filesave As Integer '保存文件的句柄 Dim filehandle As Integer '发送方文件的句柄 Dim MyLocation As Double Dim myMSG As String '消息 Dim FileisTransfer As Boolean '文件正在传送 Dim Isendfile As Boolean '是否是本人在传送 Dim FileisOver As Boolean '文件是否已经完毕 Dim Counttime As Integer '需要传递的次数 Dim totaltime As Variant Private Sub cmdsend_Click() On Error GoTo errorhandle 'this is needed for correct filename filehandle = FreeFile If Mid(File1.Path, Len(File1.Path), 1) = "\" Then Open File1.Path & File1.FileName For Binary Access Read As #filehandle Else Open File1.Path & "\" & File1.FileName For Binary Access Read As #filehandle End If Isendfile = True '是本人在传送 FileisOver = False '文件刚开始 cmdsend.Enabled = False Label1.Caption = "Wait for reply..." MsgBox ("the selected file size is " & LOF(filehandle) & " bytes") totaltime = Int(LOF(filehandle) / 4000 + 1) MyLocation = Loc(filehandle) Winsock.SendData filecomesMSG & File1.FileName '发送发出文件信息 Winsock.SendData filecountMSG & totaltime Exit Sub errorhandle: MsgBox ("You havn't choose a file!") End SubPrivate Sub Dir1_Change() File1.Path = Dir1.Path End SubPrivate Sub Drive1_Change() Dir1.Path = Drive1.Drive End SubPrivate Sub Form_Load() Drive1.Drive = "c:\" Winsock.RemoteHost = "255.255.255.255" Winsock.LocalPort = 7904 Winsock.Bind 7904 Winsockfile.RemoteHost = "255.255.255.255" Winsockfile.LocalPort = 7905 Winsockfile.Bind 7905 FileisTransfer = False 'initialize the bool value Isendfile = False FileisOver = True Counttime = 0 Label1.Caption = "Ready..." End SubPrivate Sub Timer1_Timer() Dim i As Integer If LOF(filehandle) - MyLocation > 4000 Then ReDim mybyte(0 To 4000) Get #filehandle, , mybyte MyLocation = Loc(filehandle) Winsockfile.SendData mybyte Counttime = Counttime + 1 Label1.Caption = "the select file is being transfered..." & "about " & Counttime & " / " & totaltime Timer1.Enabled = False Else ReDim mybyte(0 To LOF(filehandle) - MyLocation - 1) Get #filehandle, , mybyte Winsockfile.SendData mybyte FileisTransfer = False Timer1.Enabled = False FileisOver = True End IfEnd SubPrivate Sub Winsock_DataArrival(ByVal bytesTotal As Long) Winsock.GetData myMSG Select Case Mid(myMSG, 1, 17) Case filecomesMSG '这些消息发送方和接受方都可收到 'do display a form If Not Isendfile Then '接受方处理这些事情 On Error GoTo errorhandle CommonDialog1.FileName = Mid(myMSG, 17, Len(myMSG)) CommonDialog1.ShowSave filesave = FreeFile FileisTransfer = True cmdsend.Enabled = False Open CommonDialog1.FileName For Binary Access Write As #filesave Winsock.SendData RemoteIsReadyMSG Label1.Caption = "the select file is being transfered..." End If Case RemoteIsReadyMSG 'do begin transfer a file '如果文件还没有结束,也就是说,只有主机才能受到 If Isendfile Then If Not FileisOver Then Timer1.Enabled = True Label1.Caption = "the select file is being transfered..." Else Winsock.SendData FileisOverMSG End If End If Case FileisOverMSG If Not Isendfile Then '客户机处理 Close #filesave FileisTransfer = False Else '主机处理 Isendfile = False Close #filehandle End If MsgBox ("the file is transfered successfully!") '大家一起处理 Isendfile = False cmdsend.Enabled = True Label1.Caption = "Ready..." Case RemoteDenyMSG If Isendfile Then MsgBox ("The user canceled this transfer session!") Isendfile = False FileisOver = True cmdsend.Enabled = True Label1.Caption = "Ready..." Close #filehandle End If Case filecountMSG If Not Isendfile Then totaltime = Mid(myMSG, 17, Len(myMSG)) End If End Select Exit Sub errorhandle: Winsock.SendData RemoteDenyMSG End Sub Private Sub writetofile() Put #filesave, , arrdata End SubPrivate Sub Winsockfile_DataArrival(ByVal bytesTotal As Long) If FileisTransfer Then Winsockfile.GetData arrdata, vbArray + vbByte, 4001 writetofile Winsock.SendData RemoteIsReadyMSG Counttime = Counttime + 1 Label1.Caption = "the select file is being transfered..." & "about " & Counttime & "/" & totaltime End If End Sub
大致的思路就是这样的
'Author:Dah
'Coded time:2000.11.10 //y.m.d
'Usage:transfer a file to another pc through intranet with winsock power
Option Explicit
Dim mybyte() As Byte '发送方数组
Const filecomesMSG = "a file is coming " '有文件到来
Const RemoteIsReadyMSG = "I'm ready " '准备好了
Const FileisOverMSG = "the file is ended" '文件完毕
Const RemoteDenyMSG = "the user canceled"
Const filecountMSG = "the file lengh is"
Dim arrdata() As Byte '收到的信息
Dim filesave As Integer '保存文件的句柄
Dim filehandle As Integer '发送方文件的句柄
Dim MyLocation As Double
Dim myMSG As String '消息
Dim FileisTransfer As Boolean '文件正在传送
Dim Isendfile As Boolean '是否是本人在传送
Dim FileisOver As Boolean '文件是否已经完毕
Dim Counttime As Integer '需要传递的次数
Dim totaltime As Variant
Private Sub cmdsend_Click()
On Error GoTo errorhandle
'this is needed for correct filename
filehandle = FreeFile
If Mid(File1.Path, Len(File1.Path), 1) = "\" Then
Open File1.Path & File1.FileName For Binary Access Read As #filehandle
Else
Open File1.Path & "\" & File1.FileName For Binary Access Read As #filehandle
End If
Isendfile = True '是本人在传送
FileisOver = False '文件刚开始
cmdsend.Enabled = False
Label1.Caption = "Wait for reply..."
MsgBox ("the selected file size is " & LOF(filehandle) & " bytes")
totaltime = Int(LOF(filehandle) / 4000 + 1)
MyLocation = Loc(filehandle)
Winsock.SendData filecomesMSG & File1.FileName '发送发出文件信息
Winsock.SendData filecountMSG & totaltime
Exit Sub
errorhandle: MsgBox ("You havn't choose a file!")
End SubPrivate Sub Dir1_Change()
File1.Path = Dir1.Path
End SubPrivate Sub Drive1_Change()
Dir1.Path = Drive1.Drive
End SubPrivate Sub Form_Load()
Drive1.Drive = "c:\"
Winsock.RemoteHost = "255.255.255.255"
Winsock.LocalPort = 7904
Winsock.Bind 7904
Winsockfile.RemoteHost = "255.255.255.255"
Winsockfile.LocalPort = 7905
Winsockfile.Bind 7905
FileisTransfer = False 'initialize the bool value
Isendfile = False
FileisOver = True
Counttime = 0
Label1.Caption = "Ready..."
End SubPrivate Sub Timer1_Timer()
Dim i As Integer
If LOF(filehandle) - MyLocation > 4000 Then
ReDim mybyte(0 To 4000)
Get #filehandle, , mybyte
MyLocation = Loc(filehandle)
Winsockfile.SendData mybyte
Counttime = Counttime + 1
Label1.Caption = "the select file is being transfered..." & "about " & Counttime & " / " & totaltime
Timer1.Enabled = False
Else
ReDim mybyte(0 To LOF(filehandle) - MyLocation - 1)
Get #filehandle, , mybyte
Winsockfile.SendData mybyte
FileisTransfer = False
Timer1.Enabled = False
FileisOver = True
End IfEnd SubPrivate Sub Winsock_DataArrival(ByVal bytesTotal As Long)
Winsock.GetData myMSG
Select Case Mid(myMSG, 1, 17)
Case filecomesMSG '这些消息发送方和接受方都可收到
'do display a form
If Not Isendfile Then '接受方处理这些事情
On Error GoTo errorhandle
CommonDialog1.FileName = Mid(myMSG, 17, Len(myMSG))
CommonDialog1.ShowSave
filesave = FreeFile
FileisTransfer = True
cmdsend.Enabled = False
Open CommonDialog1.FileName For Binary Access Write As #filesave
Winsock.SendData RemoteIsReadyMSG
Label1.Caption = "the select file is being transfered..."
End If
Case RemoteIsReadyMSG
'do begin transfer a file
'如果文件还没有结束,也就是说,只有主机才能受到
If Isendfile Then
If Not FileisOver Then
Timer1.Enabled = True
Label1.Caption = "the select file is being transfered..."
Else
Winsock.SendData FileisOverMSG
End If
End If
Case FileisOverMSG
If Not Isendfile Then '客户机处理
Close #filesave
FileisTransfer = False
Else '主机处理
Isendfile = False
Close #filehandle
End If
MsgBox ("the file is transfered successfully!") '大家一起处理
Isendfile = False
cmdsend.Enabled = True
Label1.Caption = "Ready..."
Case RemoteDenyMSG
If Isendfile Then
MsgBox ("The user canceled this transfer session!")
Isendfile = False
FileisOver = True
cmdsend.Enabled = True
Label1.Caption = "Ready..."
Close #filehandle
End If
Case filecountMSG
If Not Isendfile Then
totaltime = Mid(myMSG, 17, Len(myMSG))
End If
End Select
Exit Sub
errorhandle: Winsock.SendData RemoteDenyMSG
End Sub
Private Sub writetofile()
Put #filesave, , arrdata
End SubPrivate Sub Winsockfile_DataArrival(ByVal bytesTotal As Long)
If FileisTransfer Then
Winsockfile.GetData arrdata, vbArray + vbByte, 4001
writetofile
Winsock.SendData RemoteIsReadyMSG
Counttime = Counttime + 1
Label1.Caption = "the select file is being transfered..." & "about " & Counttime & "/" & totaltime
End If
End Sub
基本思路是使用基本的响应停止协议发送文件.
然后将文件读入字节数组,发送出去。接收方收到信息后,打开一个文件,将接收到的数据写入文件,一直到接收到的数据超过了文件大小,关闭文件。
请注意,一定要用二进制读,不能用string.因为doc文件,尽管其中的许多内容是文本,但本质上,它还是二进制文件。