C#使用Socket登陆WordPress源码

就在昨晚，在本屌丝刚刚发布屌丝与女神的回忆史《C#外挂QQ找茬辅助源码，早期开发》后，在苏飞大哥的技术讨论群有个群友提出一个问题。使用http协议模拟工具可以登录成功WordPress但是自己写代码死活登陆不上。本人玩Wordpress已经很多年了，在很多年前还没有女神的时候就开始有开发Wordpress客户端的冲动。最终都不了了之。今天群友提出的问题让我重拾以前的那份冲动….说多了，言归正传
本屌最开始也是使用苏飞大哥写的Httphelper类。也是死活登陆不上，取不到登陆之后的Cookie值。最后就在想，为什么Fiddler里面看到的报文跟我发过去的都差不多而不行呢。可能是在访问的时候某些参数不正确吧，那我把发送过去的报文做成一模一样的应该没有问题吧。所以下面用到了Socket访问80端口的形式发送报文..（下载地址在最后）

使用Socket方式发送报文以及提取Cookie并访问网站的代码：
[code lang=”csharp”] class loginwp
{
public string PostData(string postURL, string postString, string encoding)
{
string strHTML = "";//用来保存获得的HTML代码
Uri URI = new Uri(postURL);
string sendString;
sendString = "POST {0} HTTP/1.1\r\n";
sendString += "Host: {1}\r\n";
sendString += "User-Agent:Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0\r\n";
sendString += "Content-Type:application/x-www-form-urlencoded\r\n";
sendString += "Content-Length:{2}\r\n";
sendString += "Connection:close\r\n";
sendString += "Cookie:wordpress_test_cookie=WP+Cookie+check\r\n\r\n";
sendString += "{3}\r\n";
sendString = string.Format(sendString, URI.PathAndQuery, URI.Host, postString.Length, postString);
Byte[] ByteGet = Encoding.GetEncoding(encoding).GetBytes(sendString);
IPAddress hostadd = Dns.GetHostEntry(URI.Host).AddressList[0];
IPEndPoint EPhost = new IPEndPoint(hostadd, 80);
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
s.Connect(EPhost);
if (!s.Connected)
{
strHTML = "链接主机失败";
}
s.Send(ByteGet, ByteGet.Length, SocketFlags.None);
strHTML = Recv(s, Encoding.GetEncoding(encoding));
return strHTML;
}

public static String Recv(Socket sock, Encoding encode)
{
Byte[] buffer = new Byte[1024];
StringBuilder sb = new StringBuilder();

Thread.Sleep(50);//根据页面响应时间进行微调
Int32 len = sock.Receive(buffer);
sb.Append(encode.GetString(buffer, 0, len));

while (sock.Available > 0)
{
Thread.Sleep(300);//也可以视情况微调
Array.Clear(buffer, 0, buffer.Length);
len = sock.Receive(buffer);
sb.Append(encode.GetString(buffer, 0, len));
string ss = encode.GetString(buffer, 0, len);
}
sock.Close();
return sb.ToString();
}

/// <summary>
/// 从返回的源代码中提取cookies 以及301或302跳转
/// </summary>
/// <param name="s"></param>
/// <param name="location"></param>
/// <returns></returns>
public string GetCookies(string html, out string location)
{
StringBuilder sbCookies = new StringBuilder();
location = string.Empty;
string[] arr = html.Split(new string[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
foreach (string str in arr)
{
if (str.StartsWith("Set-Cookie: "))
{
int intStart = str.IndexOf(";");
string strCookie = str.Substring(12, intStart – 11);
sbCookies.Append(strCookie);
}
if (str.StartsWith("Location:"))
{
location = str.Substring(10);
}
}
return sbCookies.ToString();
}

/// <summary>
/// 带上cookies 获取需要登录验证的页面
/// </summary>
/// <param name="url">请求的URL</param>
/// <param name="cookies">cookies字符串</param>
/// <param name="encoding">页面编码</param>
/// <returns></returns>
public string GetPage(string url, string cookies, string encoding)
{
Uri URI = new Uri(url);
string strHTML = string.Empty;//用来保存获得的HTML代码
IPHostEntry gist = Dns.GetHostEntry(URI.Host);//获得当前url的ip地址
IPAddress ip = gist.AddressList[0];//提取IP地址
IPEndPoint ipEnd = new IPEndPoint(ip, 80);//封装IP地址和端口
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//实例化Stock
try
{
socket.Connect(ipEnd);
}//自动循环捕捉连接
catch
{ }
string sendString = "GET " + URI.PathAndQuery + " HTTP/1.1\r\n";
sendString += "Connection:close\r\n";
sendString += "Content-Type: application/x-www-form-urlencoded\r\n";
sendString += "Host:" + URI.Host + "\r\n";
if (!string.IsNullOrEmpty(cookies))
sendString += "Cookie:" + cookies + "\r\n\r\n";
byte[] ms = UTF8Encoding.GetEncoding(encoding).GetBytes(sendString);//将头部转换成byte形式
socket.Send(ms);//发送
int recv = -1;//定义接受数据长度
byte[] data = new byte[1024];//用来保存接收数据
do
{
recv = socket.Receive(data);
strHTML += Encoding.GetEncoding(encoding).GetString(data, 0, recv);
} while (recv != 0);
return strHTML;
}
}[/code]
最后放上Demo:C#使用Socket登陆Wordpress.zip