如何使用FTP基于模式匹配获取文件列表? [英] How to get list of files based on pattern matching using FTP?

问题描述

我需要从FTP服务器获取文件列表.

I need to get a list of files from an FTP server.

FTP服务器有超过10，000个文件.

The FTP server has over 10, 000 files.

我只需要以ABC...开头的文件(类似于10个文件). 但是新文件每10分钟添加一次.

I only need the files that start with ABC... (which is like 10 files). But new files get added every 10 minutes.

所以我只需要获取最近10分钟内创建的以ABC开头的文件.

So I only need to get the files that start with ABC that have been created in the last 10 minutes.

我该如何实现?我可以从C#本地执行此操作吗?

How do I achieve this? Can I do this from C# natively?

到目前为止，我可以连接到FTP服务器，获取所有文件的列表并检查每个文件的名称...如果文件数量增加，这似乎将花费很长时间. ...

What I have seen so far, I can connect to the FTP server, get a list of ALL the files and check the name of each one... this seems like it would take a long time if the number of files increases...

Ta

推荐答案

通常，除了您知道的方法外，别无其他方法:检索所有文件的列表并在本地进行过滤.

In general, there's no other way than the one you know: retrieve list of all files and filter them locally.

但是许多服务器支持列表的非标准/专有过滤.

But many servers support non-standard/proprietary filtering of the listing.

如果幸运的话，您的FTP服务器确实支持此功能，则可以使用文件掩码仅检索文件的子集.在您的情况下，遮罩通常类似于ABC*.大多数主要的FTP服务器都支持*模式.

If you are lucky and your FTP server do support this, you can use a file mask to retrieve only a subset of files. In your case the mask would by usually like ABC*. Most major FTP servers do support * pattern.

FtpWebRequest request =
    (FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/remote/path/ABC*");
request.Credentials = new NetworkCredential("username", "password");  
request.Method = WebRequestMethods.Ftp.ListDirectory;
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream);
Console.WriteLine(reader.ReadToEnd());

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有关受支持的普通FTP服务器模式的部分列表，请参阅我对 FTP目录部分列表(带通配符)的回答.

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