[英]Connecting to IRC via a proxy (.NET)
通過.NET應用程序連接到IRC時,我希望隱藏我的IP。 我目前使用IrcDotNet庫,但它似乎不支持代理。
我對套接字沒有太多的經驗,所以我認為修改IrcDotNet比制作自己的IRC庫要容易得多。 我到處尋找用於處理可以在IrcDotNet中實現的代理連接的套接字庫。 我找到了一個稱為ProxySocket的代理,但它僅支持BeginConnect,而不支持IrcDotNet使用的新ASyncConnect方法。
為了進行分解,按喜好排序,這就是我想要的;
我正在使用的IrcDotNet版本為0.4.1,可從https://launchpad.net/ircdotnet找到。
更新1:恐怕還是沒有運氣。 Fredrik92的回答雖然有用,但不適用於我正在使用的IrcDotNet版本(請參見上文)。
IRC.NET庫使用System.Net.Sockets命名空間中的標准Socket類。
因此,您只需在IRC.NET源代碼(@ http://ircdotnet.codeplex.com/SourceControl/latest )中修改IrcDotNet / IrcClient.cs文件即可。
您應該為啟用代理的IRC客戶端添加一個構造函數,並調用默認構造函數。
然后,您需要做的就是修改同一文件(幾乎在底部)中的Connect方法。 他們每次調用this.client.BeginConnect(..)
,都必須添加代碼以連接到代理(而不是遠程主機)。
現在,您只需要創建一個新的Connect-callback方法即可將HTTP CONNECT請求發送到代理。 閱讀來自HTTP代理的響應,然后其他所有內容都應該起作用。
在這種情況下,我會將HTTP請求作為原始ASCII字節寫入代理(而不是使用HttpWebRequest類),以便您完全控制返回的網絡流...
您應該添加某事。 像這樣對IrcClient類:
private bool useProxy = false;
private IWebProxy proxy;
private IEnumerable<Uri> proxyRemoteUris;
public IrcClient(IWebProxy proxy)
: this()
{
this.useProxy = true;
this.proxy = proxy;
}
private void ProxyPerformHttpConnect(Uri remoteIrcUri)
{
string httpConnectRequest = string.Format("CONNECT {0}:{1} HTTP/1.1\r\nHost: {2}\r\n\r\n",
remoteIrcUri.Host, remoteIrcUri.Port, this.proxy.GetProxy(remoteIrcUri));
byte[] httpConnectData = Encoding.ASCII.GetBytes(httpConnectRequest);
this.stream.Write(httpConnectData, 0, httpConnectData.Length);
bool responseReady = false;
string responseText = string.Empty;
// Byte-by-byte reading required, because StringReader will read more than just the HTTP response header
do
{
int readByte = this.stream.ReadByte();
if (readByte < 0)
throw new WebException(message: null, status: WebExceptionStatus.ConnectionClosed);
char readChar = (char)(readByte); // Only works because HTTP Headers are ASCII encoded.
responseText += readChar;
responseReady = responseText.EndsWith("\r\n\r\n");
} while (!responseReady);
int statusStart = responseText.IndexOf(' ') + 1;
int reasonStart = responseText.IndexOf(' ', statusStart) + 1;
int reasonEnd = responseText.IndexOfAny(new char[] { '\r', '\n'});
HttpStatusCode responseStatus = (HttpStatusCode)(int.Parse(responseText.Substring(responseText.IndexOf(' ') + 1, length: 3)));
if (responseStatus != HttpStatusCode.OK)
{
string reasonText = responseText.Substring(reasonStart, reasonEnd - reasonStart);
if (string.IsNullOrWhiteSpace(reasonText))
reasonText = null;
throw new WebException(reasonText, WebExceptionStatus.ConnectFailure);
}
// Finished Response Header read...
}
private void ProxyConnectCallback(IAsyncResult ar)
{
try
{
this.client.EndConnect(ar);
this.stream = this.client.GetStream();
bool proxyTunnelEstablished = false;
WebException lastWebException = null;
foreach (Uri remoteIrcUri in this.proxyRemoteUris)
{
if (this.client.Connected == false)
{
// Re-establish connection with proxy...
Uri proxyUri = this.proxy.GetProxy(remoteIrcUri);
this.client.Connect(proxyUri.Host, proxyUri.Port);
}
try
{
ProxyPerformHttpConnect(remoteIrcUri);
proxyTunnelEstablished = true;
break;
}
catch (WebException webExcept)
{
lastWebException = webExcept;
}
}
if (!proxyTunnelEstablished)
{
OnConnectFailed(new IrcErrorEventArgs(lastWebException));
return;
}
this.writer = new StreamWriter(this.stream, Encoding.Default);
this.reader = new StreamReader(this.stream, Encoding.Default);
HandleClientConnected((IrcRegistrationInfo)ar.AsyncState);
this.readThread.Start();
this.writeThread.Start();
OnConnected(new EventArgs());
}
catch (Exception ex)
{
OnConnectFailed(new IrcErrorEventArgs(ex));
}
}
因此,看起來IrcClient
類的所有Connect方法中用於代理處理的代碼都是這樣。 像這樣:
// Code snippet to insert before the call to this.client.BeginConnect(...)
if (this.useProxy)
{
// Assign host and port variables for EndPoint objects:
// var host = remoteEP.Address;
// var port = remoteEP.Port;
this.proxyRemoteUris = new Uri[] { new Uri(string.Format("irc://{0}:{1}/", host, port)) };
// Replace the line above with the following line in the method where an array of IP addresses is specified as a parameter
// this.proxyRemoteUris = from ip in addresses select new Uri(string.Format("irc://{0}:{1}/", ip, port));
Uri proxyUri = this.proxy.GetProxy(this.proxyRemoteUris.First());
string proxyHost = proxyUri.Host;
int proxyPort = proxyUri.Port;
this.client.BeginConnect(proxyHost, proxyPort, ProxyConnectCallback, registrationInfo);
}
else
// Original this.client.BeginConnect(...) call here...
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