ftp列表目录-如何仅获取文件名 [英] Ftp List directory - how to get only filenames

问题描述

我正在为我目前正在编写的一小段代码而苦苦挣扎.该应用程序应该每天运行一次，并从ftp服务器下载所有文件.我的问题是:

I am struggling with a small piece of code which I am currently writing. The application is supposed to run once a day and download all files from an ftp server. My problem is:

尽管从理论上讲，我列出不真实内容的例程运行良好，可以检查所有文件并将其保存到列表中，但实际存在2个错误:

Although in theory my routine to list the direcoty content runs fine, checks all files and saves them to a list, practical there are 2 errors:

1. 列表是html格式的
2. 我只需要文件名和扩展名

代码

string localPath = System.Reflection.Assembly.GetExecutingAssembly().Location;    
List<string> FtpListing = new List<string>();
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(Properties.Settings.Default.FtpUrl);
//request.Proxy = GlobalProxySelection.GetEmptyWebProxy();
request.Credentials = new NetworkCredential(Properties.Settings.Default.FtpUsername, Properties.Settings.Default.FtpPassword);
request.Method = WebRequestMethods.Ftp.ListDirectory;
using (StreamReader streamReader = new StreamReader(request.GetResponse().GetResponseStream()))
{
    string fileName = streamReader.ReadLine();
    while (fileName != null)
    {
         FtpListing.Add(fileName);
         fileName = streamReader.ReadLine();
    }
}

没有代理，它将返回html，而未对代理语句进行注释我正在得到远程服务器返回错误:(550)文件不可用(例如，文件未找到，无法访问).错误.

Without proxy it returns html, with the proxy statement uncommented I am getting a The remote server returned an error: (550) File unavailable (e.g., file not found, no access). error.

我在哪里失败?

/这是该列表的屏幕截图，应列出所有文件，但会保存完整的html文件:

/edit: here is a screenshot of the list, where all files should be listed, but instead a complete html file is saved:

推荐答案

我通过使用 HtmlAgilityPack .

由于我无法更改html响应，因此更改了 List< string>FtpListing 转换为简单的 string .通过此字符串，我解析了webrequest提供的html代码中的每个< a> 标记.

Since I can't change the html response, I changed my List<string> FtpListing to a simple string. With this string I parsed every <a> tag in the html code provided by the webrequest.

代码:

string HtmlResult = String.Empty;
Console.WriteLine("Starting listing of files....");
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(Properties.Settings.Default.FtpUrl);
request.Credentials = new NetworkCredential(Properties.Settings.Default.FtpUsername, Properties.Settings.Default.FtpPassword);
request.UsePassive = false;
request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
using (Stream responsestream = response.GetResponseStream())
{
    using (StreamReader reader = new StreamReader(responsestream))
    {
        string _line = reader.ReadLine();
        while (_line != null && _line != String.Empty)
        {
            HtmlResult += _line;
            _line = reader.ReadLine();
        }
    }                    
}
//parse html output
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(HtmlResult);
foreach (HtmlAgilityPack.HtmlNode node in doc.DocumentNode.SelectNodes("//a[@href]"))
{
    if(node.InnerText.Contains(".txt")) FtpListing.Add(node.InnerText);
}
Console.WriteLine("{0} Files found", FtpListing.Count);

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