如何修复 System.Net.WebException：'文件名、目录名或卷标语法不正确

Question

我正在尝试为程序创建引导程序，并且错误“System.Net.WebException：'文件名、目录名或卷标语法不正确”不断弹出。

我一直卡在这个问题上，一直在猜测如何解决这个问题。

String pname = "Fredysploit_v2";
String dlink = "https://pastebin.com/V5NcE09n";
string title = @"Title ";
Console.Title = pname + " Bootstrapper";

Console.ForegroundColor = ConsoleColor.Blue;
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine(title);
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Downloading new Files...");
WebClient wc = new WebClient();
string key = wc.DownloadString(dlink);
string path = @"Update\" + pname + ".exe";
System.Net.WebClient Dow = new WebClient();
string patch = (@"Update");
Directory.CreateDirectory(patch);
//My problem ↓
Dow.DownloadFile(key, path);
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine(pname + " Downloaded | Updated!");
Console.WriteLine($"Now open " + patch + " and Run " + pname + ".exe");
Console.ReadKey();

我希望结果是从作为 pastebin 链接的文本中下载文件，但实际结果是“System.Net.WebException：'文件名、目录名或卷标语法不正确”。

Answer 1

问题是您获取的 HTML 表单 pastebin 的整个页面不是您要查找的 URL。正如@Jon Skeet 在 cmets 中提到的，尝试使用 https://pastebin.com/raw/V5NcE09n 作为 dlink ，所以它显示如下：

String dlink = "https://pastebin.com/raw/V5NcE09n";

更新后的代码解决方案如下：

String pname = "Fredysploit_v2";
String dlink = "https://pastebin.com/raw/V5NcE09n";
string title = @"Title ";
Console.Title = pname + " Bootstrapper";

Console.ForegroundColor = ConsoleColor.Blue;
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine(title);
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Downloading new Files...");
WebClient wc = new WebClient();
string key = wc.DownloadString(dlink);
string path = @"Update\" + pname + ".exe";
System.Net.WebClient Dow = new WebClient();
string patch = (@"Update");
Directory.CreateDirectory(patch);

Dow.DownloadFile(key, path);
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine(pname + " Downloaded | Updated!");
Console.WriteLine($"Now open " + patch + " and Run " + pname + ".exe");
Console.ReadKey();

Answer 2

我认为正在发生的事情是您尝试将整个网站作为文件下载，而不是下载在您的 pastebin 内容 (proof here) 中链接的文件。

也许有一种获取链接的方法，例如：解析网站的 html 并从特定的 html 标签读取内容，或者，如果存在，使用 pastebin api（我现在会检查那个。@987654322 @. 也许看看这个）

---

由于 api 对您的帮助不大，这里有一些代码可以从网站解析 HTML： WebClient client = new WebClient(); String htmlCode = client.DownloadString("@987654323@");

这允许您获取粘贴中的字符串。

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这将是您对代码的最后更改，应该可以解决您的问题

    String pname = "Fredysploit_v2";
    String dlink = "https://pastebin.com/raw/dnfHuGAK"; 
    //^ changed the download link to the raw paste so you can extract your link
    string title = @"Title ";
    Console.Title = pname + " Bootstrapper";

    Console.ForegroundColor = ConsoleColor.Blue;
    Console.ForegroundColor = ConsoleColor.Cyan;
    Console.WriteLine(title);
    Console.ForegroundColor = ConsoleColor.Green;
    Console.WriteLine("Downloading new Files...");
    WebClient wc = new WebClient();
    string key = wc.DownloadString(dlink);
    string path = @"Update\" + pname + ".exe";
    System.Net.WebClient Dow = new WebClient();
    string patch = (@"Update");
    Directory.CreateDirectory(patch);
    Dow.DownloadFile(key, path);
    Console.ForegroundColor = ConsoleColor.Green;
    Console.WriteLine(pname + " Downloaded | Updated!");
    Console.WriteLine($"Now open { patch } and Run { pname }.exe");
    //^ since you are using String.Format(), make use of it :)
    Console.ReadKey();