blocks|key|999188|text|您需要目标域上的侦听器、在那里运行的ftp服务器，在客户端您将使用System.Net.WebClient和UploadFile或UploadFileAsync发送文件。这就是你要问的吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|999189|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

you need some listener on the target domain, ftp server running there, and on the client side you will use System.Net.WebClient and UploadFile or UploadFileAsync to send the file. is that what you are asking?

blocks|key|2196643|text|听起来你并不真的需要一个webservice或处理程序。您所需要的只是一个程序，该程序将定期打开到另一台服务器的FTP连接并移动文件。这可以通过任何.NET程序与System.WebClient库，不一定是一个“网络应用”。另一个程序可以是一个服务，它可以处理自己的计时，也可以是一个由您的cron作业运行的简单应用程序。如果您需要这两种方式，例如，如果这两台服务器是镜像，您只需在第二个框上使用相同的应用程序就可以将文件上传到第一个服务器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2196644|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

It sounds like you don't really need a webservice or handler. All you need is a program that will, at regular intervals, open up an FTP connection to the other server and move the files. This can be done by any .NET program with the System.WebClient library, doesn't have to be a "web app". This other program could be a service, which could handle its own timing, or a simple app run by your cron job. If you need this to go two ways, for instance if the two servers are mirrors, you simply have the same app on the second box doing the same thing to upload files over to the first.

blocks|key|999288|text|以下是另一个解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|999289|让服务器A中的ASP.Net作为常规文件接收该文件，并将其存储在XXX目录中|ordered-list-item|999290|在服务器A中有一个windows服务，用于检查目录XXX中的新文件。|999291|让窗口服务使用HttpWebRequest将文件上载到服务器B|offset|length|style|CODE|999292|让服务器B使用常规的ASP.Net文件上传页面接收文件。|999293|链接：|999294|文件上传示例(ASP.Net)：http://msdn.microsoft.com/en-us/library/aa479405.aspx|unordered-list-item|999295|构建windows服务：http://www.codeproject.com/KB/system/WindowsService.aspx|999296|使用HttpWebRequest：使用HTTPWebrequest上传文件(多部分/表单-数据)上传文件|999297|你有问题要解决：|999298|如何确定哪些文件要上传到服务器B。我将在Timer中使用Timer查找新文件，而不是使用FileSystemWatcher。您需要能够检查文件是否已经上传(删除、重命名、检查DB或其他适合您需要的文件)。|999299|在服务器B上进行身份验证，以便只有您可以将文件上载到服务器B。|999300|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/aa479405.aspx|1|http://www.codeproject.com/KB/system/WindowsService.aspx|2|https://stackoverflow.com/questions/566462/upload-files-with-httpwebrequest-multipart-form-data^0|0|0|0|7|E|0|0|0|G|1H|0|0|C|1K|1|0|H|V|2|0|0|K|5|S|5|18|H|0|0^^$0|@$1|2|3|4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1G|8|@]|9|@]|A|$]]|$1|E|3|F|5|D|7|1H|8|@]|9|@]|A|$]]|$1|G|3|H|5|D|7|1I|8|@$I|1J|J|1K|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|1L|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1M|8|@]|9|@]|A|$]]|$1|Q|3|R|5|S|7|1N|8|@]|9|@$I|1O|J|1P|1|1Q]]|A|$]]|$1|T|3|U|5|S|7|1R|8|@]|9|@$I|1S|J|1T|1|1U]]|A|$]]|$1|V|3|W|5|S|7|1V|8|@]|9|@$I|1W|J|1X|1|1Y]]|A|$]]|$1|X|3|Y|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|Z|3|10|5|D|7|20|8|@$I|21|J|22|K|L]|$I|23|J|24|K|L]|$I|25|J|26|K|L]]|9|@]|A|$]]|$1|11|3|12|5|D|7|27|8|@]|9|@]|A|$]]|$1|13|3|-4|5|6|7|28|8|@]|9|@]|A|$]]]|14|$15|$5|16|17|18|A|$19|1A]]|1B|$5|16|17|18|A|$19|1C]]|1D|$5|16|17|18|A|$19|1E]]]]

Here is another solution:

<ol>
<li>Let ASP.Net in server A receive the file as a regular file upload and store it in directory XXX</li>
<li>Have a windows service in server A that checks directory XXX for new files.</li>
<li>Let the window service upload the file to server B using <code>HttpWebRequest</code></li>
<li>Let server B receive the file using a regular ASP.Net file upload page.</li>
</ol>

Links:

<ul>
<li>File upload example (ASP.Net): <a href="http://msdn.microsoft.com/en-us/library/aa479405.aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/aa479405.aspx</a></li>
<li>Building a windows service: <a href="http://www.codeproject.com/KB/system/WindowsService.aspx" rel="nofollow noreferrer">http://www.codeproject.com/KB/system/WindowsService.aspx</a></li>
<li>Uploading files using HttpWebRequest: <a href="https://stackoverflow.com/questions/566462/upload-files-with-httpwebrequest-multipart-form-data">Upload files with HTTPWebrequest (multipart/form-data)</a></li>
</ul>

Problems you gotto solve:

<ol>
<li>How to determine which files to upload to server B. I would use <code>Directory.GetFiles</code> in a <code>Timer</code> to find new files instead of using a <code>FileSystemWatcher</code>. You need to be able to check if a file have been uploaded previously (delete it, rename it, check DB or whatever suits your needs).</li>
<li>Authentication on server B, so that only you can upload files to it.</li>
</ol>

blocks|key|2196727|text|要回答你的问题-是的，你可以同时读和写文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2196728|您可以将FTPWebRequest打开到ServerA，FTPWebRequest打开到ServerB。在FTPWebRequest到serverA上，您将请求文件，并获取ResponseStream。一旦您拥有了ResponseStream，您将一次读取一组字节，并将这些字节块写入serverB+RequestStream。|offset|length|style|CODE|2196729|您将使用的唯一内存是读/写循环中的byte[]缓冲区。不过，请记住，在返回响应流之前，FTPWebRequest的底层实现将下载完整的FTP文件。|2196730|类似地，在写入所有字节之前，不能发送FTPWebRequest上载新文件。实际上，这些操作将同步进行。您将调用GetResponse，它将在完整文件可用之前不会返回，只有这样，您才能“上传”新文件。|2196731|参考文献：|2196732|FTPWebRequest|2196733|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.net.ftpwebrequest.aspx^0|0|4|D|S|D|1H|D|2E|E|2Z|E|46|D|0|H|6|17|D|0|I|D|1J|B|0|0|0|D|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@$D|Z|E|10|F|G]|$D|11|E|12|F|G]|$D|13|E|14|F|G]|$D|15|E|16|F|G]|$D|17|E|18|F|G]|$D|19|E|1A|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1B|8|@$D|1C|E|1D|F|G]|$D|1E|E|1F|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|1G|8|@$D|1H|E|1I|F|G]|$D|1J|E|1K|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|1L|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1M|8|@]|9|@$D|1N|E|1O|1|1P]]|A|$]]|$1|P|3|-4|5|6|7|1Q|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|W]]]]

To answer your questions - yes you can read and write the files at the same time. 

You can open an <code>FTPWebRequest</code> to ServerA and a <code>FTPWebRequest</code> to ServerB. On the <code>FTPWebRequest</code> to serverA you would request the file, and get the <code>ResponseStream</code>. Once you have the <code>ResponseStream</code>, you would read a chunk of bytes at a time, and write that chunck of bytes to the serverB <code>RequestStream</code>. 

The only memory you would be using would be the <code>byte[]</code> buffer in your read/write loop. Just keep in mind though that the underlying implementation of <code>FTPWebRequest</code> will download the complete FTP file before returning the response stream. 

Similarly, you cannot send your <code>FTPWebRequest</code> to upload the new file until all bytes have been written. In effect, the operations will happen synchronously. You will call <code>GetResponse</code> which won't return until the full file is available, and only then can you 'upload' the new file.

References:

<a href="http://msdn.microsoft.com/en-us/library/system.net.ftpwebrequest.aspx" rel="nofollow">FTPWebRequest</a>

blocks|key|2196753|text|如果两台机器位于同一域中，难道不能在操作系统级别上进行文件复制吗？DFS|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2196754|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Distributed_File_System_%2528Microsoft%2529^0|X|3|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

If both machines are in the same domain, couldn't you just do file replication at the OS level?
<a href="http://en.wikipedia.org/wiki/Distributed_File_System_%28Microsoft%29" rel="nofollow">DFS</a>

blocks|key|999348|text|您必须考虑的是，当.ashx刷新时，可能会杀死长期运行的web请求(您的AppDomain泛型处理程序)。因此，您必须在代码中实现某种原子事务逻辑，如果您这样做，您应该处理突然断开和不完整的FTP传输。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|999349|你以前看过Windows吗？这个云平台支持分布式文件系统，并内置原子事务。另外，如果您的服务增长很快，它就会扩展得很好。|999350|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Something you have to take into consideration is that a long running web requests (your .ashx generic handler) may be killed when the AppDomain refreshes. Therefore you have to implement some sort of atomic transaction logic in your code, and you should handle sudden disconnects and incomplete FTP transfers if you go that way.

Did you have a look at Windows Azure before? This cloud platform supports distributed file system, and has built-in atomic transactions. Plus it scales nicely, should your service grow fast.

blocks|key|2555329|text|我会让它变得很简单。客户端程序将文件上传到服务器A。这在C#中可以很容易地通过FtpWebRequest完成。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2555330|http://msdn.microsoft.com/en-us/library/ms229715.aspx|offset|length|2555331|然后，我将在服务器A上提供一个服务，监视上传文件的目录。当一个文件被上传到该目录或某个时间间隔时，它只是将文件复制到服务器B上。同样，如果文件位于同一个网络上，则可以通过Ftp或其他方式完成。|2555332|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1H|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@$D|Q|E|R|1|S]]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|C]]]]

I would make it pretty simple. The client program uploads the file to server A. This can be done very easily in C# with an FtpWebRequest.

<a href="http://msdn.microsoft.com/en-us/library/ms229715.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/ms229715.aspx</a>

I would then have a service on server A that monitors the directory where files are uploaded. When a file is uploaded to that directory or on certain intervals it simply copies files over to server B. Again this can be done via Ftp or other means if they're on the same network.

blocks|key|2555346|text|如果使用基于linux的系统，请设置密钥：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2555347|http://compdottech.blogspot.com/2007/10/unix-login-without-password-setting.html|offset|length|2555348|一旦密钥正常工作，就可以通过编写不需要任何用户交互的常规shell脚本将文件从system复制到system。|2555349|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|28|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@$D|Q|E|R|1|S]]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|C]]]]

set up keys if you are using linux based systems:

<a href="http://compdottech.blogspot.com/2007/10/unix-login-without-password-setting.html" rel="nofollow">http://compdottech.blogspot.com/2007/10/unix-login-without-password-setting.html</a>

Once you have the keys working, you can copy the file from system A to system B by writing regular shell scripts that would not need any user interactions.

In my scenario, users are able to upload zip files to <code>a.example.com</code>

I would love to create a "daemon" which in specified time intervals will move-transfer any zip files uploaded by the users from <code>a.example.com</code> to <code>b.example.com</code>

From the info i gathered so far,

<ol>
<li>The daemon will be an .ashx generic handler.</li>
<li>The daemon will be triggered at the specified time intervals via a <a href="http://www.hosting.com/support/plesk/crontab" rel="nofollow noreferrer">plesk cron job</a></li>
<li>The daemon (thanks to <a href="https://stackoverflow.com/users/34397/slaks">SLaks</a>) will consist of two FtpWebRequest's (One for reading and one for writing).</li>
</ol>

So the question is how could i implement step 3?

<ul>
<li>Do i have to read into to a memory() array the whole file and try to write that in <code>b.example.com</code> ?</li>
<li>How could i write the info i read to <code>b.example.com</code>?</li>
<li>Could i perform reading and writing of the file at the same time?</li>
</ul>

No i am not asking for the full code, i just can figure out, how could i perform reading and writing on the fly, without user interaction.

I mean i could download the file locally from <code>a.example.com</code> and upload it at <code>b.example.com</code> but that is not the point.

How To Do a Server To Server File Transfer without any user interaction?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在我的场景中，用户可以将压缩文件上传到a.example.com我希望创建一个“守护进程”，它将在指定的时间间隔内移动--将用户上传的任何zip文件从a.example.com传输到b.example.com。从我收集到的信息来看，守护进程将是一个.ashx通用处理程序。守护进程将通过在指定的时间间隔内触发。守护进程(...

问如何在没有任何用户交互的情况下进行服务器到服务器的文件传输？
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