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<title>用TCP/IP做文件续传 </title>
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<td width="621"><a href="http://www.CoDelphi.com"><img src="images/logo.gif" border="0" width="153" height="60"><img src="images/bigbanner.gif" border="0" width="468" height="60"></a></td>
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<div align="center" class="btitle">用TCP/IP做文件续传 <br>
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<div align="center"><strong>Codelphi.com </strong></div>
<b><br>
摘 要</b>： <br>
<b> 关键字</b>：续传 <br>
<b> 类 别</b>：网络
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<span class="content"><br><br>利用 TWinSocketStream 可以做到.<br><br>TServerWinSocket serverSocket;<br>TClientWinSocket clientSocket<br>TFileStream inFile, outFile;<br>// 假设各 Stream 都己 created<br><br>// 在 Server 端<br>// Client send 一个命令告知 Server 要由 536 bytes 开始传<br> inFile.Position := 536;<br> wtih TWinSocketStream.Create(serverSocket, 60000) do<br> begin<br> CopyFrom(inFile, inFile.Size - inFile.Position + 1);<br> Free;<br> end;<br><br>// 在 Client 端 OnReadEvent 中<br> memStream = TMemoryStream.Create;<br> memStream.Size = TOTAL_FILE_SIZE;<br> memStream.Position := 0;<br> socketStream := TWinSocketStream.Create(clientSocket, 60000) do<br> if socketStream.WaitForData(60000) then // give the client 60 seconds writing<br> socketStream.Read(PCharArray(memStream.Memory)^, TOTAL_FILE_SIZE)<br> memStream.Position := 0;<br> outFile.Position := 536;<br> outFile.CopyFrom(memStream);<br><br>// 释放全部的对象</span>
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中文开发在线<a href="http://www.codelphi.com" target="_blank">www.codelphi.com</a>授权使用。
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