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dotPeek逆コンパイルされたコードでコンパイラが生成した型を理解する

ヘイ。読んでいた Digi Traffic Acceleratorの逆コンパイルされたソース（私はそれが学ぶための最良の方法だと思います）、理解できないコードを取得するまで！ご覧ください：

  internal class ProxyFarm
  {
    private static Random Rand = new Random();
    private static Regex UserPassAtHostPort = new Regex("\r\n                ^\r\n                (?<user>[^:]+?) : (?<pass>[^@]+?)\r\n                @\r\n                (?<Host>[^:]+? (?: : \\d+)? )\r\n                $", RegexOptions.IgnorePatternWhitespace);
    private static Regex HostPortUserPass = new Regex("\r\n                ^\r\n                (?<Host>[^:]+? : \\d+) : (?<user>[^:]+?) : (?<pass>.+?)\r\n                $", RegexOptions.IgnorePatternWhitespace);
    public const string NEW = "new";
    public const string ACTIVE = "active";
    public const string BLOCKED_BY_GOOGLE = "blocked by Google";
    public const string INACTIVE = "inactive";
    public const string CHECKING = "Checking...";

    static ProxyFarm()
    {
    }

    public static StorageDataSet.ProxiesRow GetRandomProxy(bool WillUseRecaptcha = true)
    {
      // some normal code
    }

    public static WebProxy MakeWebProxy(StorageDataSet.ProxiesRow row)
    {
      // some normal code
    }

    public static void CheckProxy(StorageDataSet.ProxiesRow proxy)
    {
      // ISSUE: object of a compiler-generated type is created
      // ISSUE: variable of a compiler-generated type
      ProxyFarm.\u003C\u003Ec__DisplayClass5 cDisplayClass5 = new ProxyFarm.\u003C\u003Ec__DisplayClass5();
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.proxy = proxy;
      // ISSUE: reference to a compiler-generated field
      if (cDisplayClass5.proxy == null)
        return;
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.logger = LogManager.GetLogger("Program");
      // ISSUE: reference to a compiler-generated field
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.state = new ProxyFarm.CallbackState()
      {
        Proxy = cDisplayClass5.proxy,
        Google = ProxyFarm.CheckStatus.NotChecked,
        Post = ProxyFarm.CheckStatus.NotChecked
      };
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.r = (HttpWebRequest) WebRequest.Create("http://www.digitrafficgenerator.com/post_test.php");
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.r.Method = "POST";
      try
      {
        // ISSUE: reference to a compiler-generated field
        // ISSUE: reference to a compiler-generated field
        cDisplayClass5.r.Proxy = (IWebProxy) ProxyFarm.MakeWebProxy(cDisplayClass5.proxy);
      }
      catch (Exception ex)
      {
        // ISSUE: reference to a compiler-generated field
        // ISSUE: reference to a compiler-generated field
        cDisplayClass5.logger.Warn((object) ("Invalid proxy entered: " + cDisplayClass5.proxy.Address), ex);
        // ISSUE: reference to a compiler-generated field
        ProxyFarm.ChangeStatus(cDisplayClass5.proxy, "inactive");
        return;
      }
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.r.ConnectionGroupName = Guid.NewGuid().ToString();
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.byteArray = Encoding.UTF8.GetBytes("q=test");
      // ISSUE: reference to a compiler-generated field
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.r.ContentLength = (long) cDisplayClass5.byteArray.Length;
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.r.ContentType = "application/x-www-form-urlencoded";
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.r.Referer = "http://www.digitrafficgenerator.com/post_test.php";
      // ISSUE: reference to a compiler-generated field
      cDisplayClass5.r.Timeout = 20000;
      // ISSUE: reference to a compiler-generated field
      // ISSUE: reference to a compiler-generated method
      IAsyncResult res = cDisplayClass5.r.BeginGetRequestStream(new AsyncCallback(cDisplayClass5.\u003CCheckProxy\u003Eb__1), (object) null);
      // ISSUE: reference to a compiler-generated field
      WebObject.AbortRequestAfterTimeout(res, cDisplayClass5.r);
      try
      {
        // ISSUE: reference to a compiler-generated field
        // ISSUE: reference to a compiler-generated method
        // ISSUE: reference to a compiler-generated field
        res = cDisplayClass5.r.BeginGetResponse(new AsyncCallback(cDisplayClass5.\u003CCheckProxy\u003Eb__2), (object) cDisplayClass5.r);
      }
      catch (Exception ex)
      {
        // ISSUE: reference to a compiler-generated field
        // ISSUE: reference to a compiler-generated field
        cDisplayClass5.logger.Info((object) ("Got an exception using " + cDisplayClass5.proxy.Address), ex);
      }
      // ISSUE: reference to a compiler-generated field
      WebObject.AbortRequestAfterTimeout(res, cDisplayClass5.r);
      HttpWebRequest request = (HttpWebRequest) WebRequest.Create("http://www.google.com/recaptcha/api/js/recaptcha.js");
      request.Method = "GET";
      // ISSUE: reference to a compiler-generated field
      request.Proxy = (IWebProxy) ProxyFarm.MakeWebProxy(cDisplayClass5.proxy);
      request.Timeout = 20000;
      request.ConnectionGroupName = Guid.NewGuid().ToString();
      // ISSUE: reference to a compiler-generated method
      WebObject.AbortRequestAfterTimeout(request.BeginGetResponse(new AsyncCallback(cDisplayClass5.\u003CCheckProxy\u003Eb__3), (object) request), request);
    }

    protected static void ProxyChecked(IAsyncResult result, HttpWebRequest req, ProxyFarm.CallbackState state)
    {
      ILog logger = LogManager.GetLogger("Program");
      ProxyFarm.CheckStatus checkStatus = ProxyFarm.CheckStatus.NotOk;
      try
      {
        HttpWebResponse httpWebResponse = (HttpWebResponse) req.EndGetResponse(result);
        if (req.RequestUri == httpWebResponse.ResponseUri)
        {
          if (httpWebResponse.StatusCode == HttpStatusCode.OK)
            checkStatus = ProxyFarm.CheckStatus.Ok;
        }
      }
      catch (Exception ex)
      {
      }
      lock (state)
      {
        if (req.RequestUri.Authority.Contains("google.com"))
          state.Google = checkStatus;
        else
          state.Post = checkStatus;
        if (state.Post == ProxyFarm.CheckStatus.NotOk)
        {
          ProxyFarm.ChangeStatus(state.Proxy, "inactive");
          logger.Info((object) ("Marking " + state.Proxy.Address + " as inactive as it cannot POST"));
        }
        else if (state.Google == ProxyFarm.CheckStatus.NotOk)
        {
          ProxyFarm.ChangeStatus(state.Proxy, "inactive");
          logger.Info((object) ("Marking " + state.Proxy.Address + " as inactive as it is blocked by google"));
        }
        else
        {
          if (state.Google != ProxyFarm.CheckStatus.Ok || state.Post != ProxyFarm.CheckStatus.Ok)
            return;
          ProxyFarm.ChangeStatus(state.Proxy, "active");
        }
      }
    }

    public static void ReportBrokenProxy(StorageDataSet.ProxiesRow proxy, bool recaptcha_fail = false)
    {
      // some normal code
    }

    private static void ChangeStatus(StorageDataSet.ProxiesRow Proxy, string status)
    {
      // some normal code
    }

    public enum CheckStatus
    {
      NotChecked,
      Ok,
      NotOk,
    }

    protected class CallbackState
    {
      public StorageDataSet.ProxiesRow Proxy { get; set; }

      public ProxyFarm.CheckStatus Post { get; set; }

      public ProxyFarm.CheckStatus Google { get; set; }
    }
  }

ご覧のとおり、CheckProxyメソッドでは、コンパイラが新しい型を生成したようです。この方法で実際に何が起こっているのか分かりますか？コードを理解するにはどうすればよいですか？

c#decompilerdotpeekcompiler-generated
12
agent47

\u003Cと\u003Eは、それぞれ<と>のUnicode表現です。

これらの文字はILで有効です。したがって、コンパイラは衝突を回避するためにそのような名前の変数を生成します。

デコンパイラーは、それを<>に変換する方法を知らず、一時変数を削除しませんでした。

11
Simon Whitehead

dnSpy で開き、matches（ish）に一致するメソッドを探します。それらは異なる順序になりますが、dnSpyはラムダを逆コンパイルするというまともな仕事をします。

6
CAD bloke