C#如何使用Socket发送HTTP/HTTPS请求实例详解

这篇文章主要介绍了c#使用Socket发送HTTP/HTTPS请求的实现代码,需要的朋友可以参考下
C# 自带的HttpWebRequest效率太低，对于自组HTTP封包不好操作。
在写超级SQL注入工具时，研究了很长一段时间如何使用Socket来发送HTTP、HTTPS请求。
经过一年的修改和测试，可完美、高效发送并解析HTTP/HTTPS请求。修改过无数次bug。
在这里把核心代码分享出来，供大家学习或做开发参考。
用这个代码写了一个简单的HTTP发包工具。供大家参考。
工具下载：
HTTPTool.rar
核心类：HTTP.cs
using System;using System.Collections.Generic;using System.Text;using tools;using System.Net;using System.Net.Sockets;using System.IO.Compression;using System.IO;using System.Net.Security;using System.Text.RegularExpressions;using System.Threading;using System.Diagnostics;using System.Security.Authentication;using System.Security.Cryptography.X509Certificates;using HTTPTool; namespace tools{  public class HTTP  {    public const char T = '';    public const String CT = "";    public const String CTRL = " ";    public const String Content_Length_Str = "content-length: ";    public const String Content_Length_Str_M = "Content-Length: ";    public const String Content_Length = "content-length";    public const String Content_Encoding = "content-encoding";    public const String Transfer_Encoding = "transfer-encoding";    public const String Connection = "connection";    public static Main main = null;    public static long index = 0;    public void initMain(Main m)    {      main = m;    }     /**     *      发生异常尝试重连      *     */    public static ServerInfo sendRequestRetry(Boolean isSSL, int tryCount, String host, int port, String payload, String request, int timeout, String encoding, Boolean foward_302)    {      int count = 0;      Interlocked.Increment(ref index);      ServerInfo server = new ServerInfo();      timeout = timeout * 1000;      while (true)      {        if (count >= tryCount) break;         try        {          if (!isSSL)          {            server = sendHTTPRequest(count, host, port, payload, request, timeout, encoding, foward_302);            return server;          }          else          {             server = sendHTTPSRequest(count, host, port, payload, request, timeout, encoding, foward_302);            return server;           }        }        catch (Exception e)        {          Tools.SysLog("发包发生异常，正在重试----" + e.Message);          server.timeout = true;          continue;        }        finally        {          count++;        }       }      return server;     }     private static void checkContentLength(ref ServerInfo server, ref String request)    {       //重新计算并设置Content-length      int sindex = request.IndexOf(CTRL);      server.reuqestHeader = request;      if (sindex != -1)      {        server.reuqestHeader = request.Substring(0, sindex);        server.reuqestBody = request.Substring(sindex + 4, request.Length - sindex - 4);        int contentLength = Encoding.UTF8.GetBytes(server.reuqestBody).Length;        String newContentLength = Content_Length_Str_M + contentLength;         if (request.IndexOf(Content_Length_Str_M) != -1)        {          request = Regex.Replace(request, Content_Length_Str_M + "d+", newContentLength);        }        else        {          request = request.Insert(sindex, "" + newContentLength);        }      }      else      {        request = Regex.Replace(request, Content_Length_Str + "d+", Content_Length_Str_M + "0");        request += CTRL;      }      }     private static void doHeader(ref ServerInfo server, ref String[] headers)    {       for (int i = 0; i < headers.Length; i++)      {        if (i == 0)        {           server.code = Tools.convertToInt(headers[i].Split(' ')[1]);         }        else        {          String[] kv = Regex.Split(headers[i], ": ");          String key = kv[0].ToLower();          if (!server.headers.ContainsKey(key))          {            //自动识别编码            if ("content-type".Equals(key))            {              String hecnode = getHTMLEncoding(kv[1], "");              if (!String.IsNullOrEmpty(hecnode))              {                server.encoding = hecnode;              }            }            if (kv.Length > 1)            {              server.headers.Add(key, kv[1]);            }            else            {              server.headers.Add(key, "");            }          }        }      }     }      private static ServerInfo sendHTTPRequest(int count, String host, int port, String payload, String request, int timeout, String encoding, Boolean foward_302)    {       String index = Thread.CurrentThread.Name + HTTP.index;      Stopwatch sw = new Stopwatch();      sw.Start();      ServerInfo server = new ServerInfo();      TcpClient clientSocket = null;      int sum = 0;      try      {        if (port > 0 && port <= 65556)        {          //编码处理          server.request = request;          TimeOutSocket tos = new TimeOutSocket();          clientSocket = tos.Connect(host, port, timeout);          if (sw.ElapsedMilliseconds >= timeout)          {            return server;          }          clientSocket.SendTimeout = timeout - tos.useTime;          if (clientSocket.Connected)          {            checkContentLength(ref server, ref request);            server.request = request;             byte[] requestByte = Encoding.UTF8.GetBytes(request);            clientSocket.Client.Send(requestByte);            byte[] responseBody = new byte[1024 * 1000];            int len = 0;            //获取header头            String tmp = "";            StringBuilder sb = new StringBuilder();            clientSocket.ReceiveTimeout = timeout - (int)sw.ElapsedMilliseconds;            do            {              byte[] responseHeader = new byte[1];              len = clientSocket.Client.Receive(responseHeader, 1, SocketFlags.None);              if (len == 1)              {                 char c = (char)responseHeader[0];                sb.Append(c);                if (c.Equals(T))                {                  tmp = String.Concat(sb[sb.Length - 4], sb[sb.Length - 3], sb[sb.Length - 2], c);                }              }            } while (!tmp.Equals(CTRL) && sw.ElapsedMilliseconds < timeout);             server.header = sb.ToString().Replace(CTRL, "");            String[] headers = Regex.Split(server.header, CT);            if (headers != null && headers.Length > 0)            {              //处理header              doHeader(ref server, ref headers);              //自动修正编码              if (!String.IsNullOrEmpty(server.encoding))              {                encoding = server.encoding;              }              Encoding encod = Encoding.GetEncoding(encoding);               //302 301跳转              if ((server.code == 302 || server.code == 301) && foward_302)              {                StringBuilder rsb = new StringBuilder(server.request);                int urlStart = server.request.IndexOf(" ") + 1;                int urlEnd = server.request.IndexOf(" HTTP");                if (urlStart != -1 && urlEnd != -1)                {                  String url = server.request.Substring(urlStart, urlEnd - urlStart);                  rsb.Remove(urlStart, url.Length);                  String location = server.headers["location"];                  if (!server.headers["location"].StartsWith("/") && !server.headers["location"].StartsWith("http"))                  {                    location = Tools.getCurrentPath(url) + location;                  }                  rsb.Insert(urlStart, location);                   return sendHTTPRequest(count, host, port, payload, rsb.ToString(), timeout, encoding, false);                }               }                //根据请求头解析              if (server.headers.ContainsKey(Content_Length))              {                int length = int.Parse(server.headers[Content_Length]);                 while (sum < length && sw.ElapsedMilliseconds < timeout)                {                  int readsize = length - sum;                  len = clientSocket.Client.Receive(responseBody, sum, readsize, SocketFlags.None);                  if (len > 0)                  {                    sum += len;                  }                }              }              //解析chunked传输              else if (server.headers.ContainsKey(Transfer_Encoding))              {                //读取长度                int chunkedSize = 0;                byte[] chunkedByte = new byte[1];                //读取总长度                sum = 0;                do                {                  String ctmp = "";                  do                  {                    len = clientSocket.Client.Receive(chunkedByte, 1, SocketFlags.None);                    ctmp += Encoding.UTF8.GetString(chunkedByte);                   } while ((ctmp.IndexOf(CT) == -1) && (sw.ElapsedMilliseconds < timeout));                   chunkedSize = Tools.convertToIntBy16(ctmp.Replace(CT, ""));                   //chunked的结束0 是结束标志，单个chunked块结束                  if (ctmp.Equals(CT))                  {                    continue;                  }                  if (chunkedSize == 0)                  {                    //结束了                    break;                  }                  int onechunkLen = 0;                  while (onechunkLen < chunkedSize && sw.ElapsedMilliseconds < timeout)                  {                    len = clientSocket.Client.Receive(responseBody, sum, chunkedSize - onechunkLen, SocketFlags.None);                    if (len > 0)                    {                      onechunkLen += len;                      sum += len;                    }                  }                   //判断                } while (sw.ElapsedMilliseconds < timeout);              }              //connection close方式或未知body长度              else              {                while (sw.ElapsedMilliseconds < timeout)                {                  if (clientSocket.Client.Poll(timeout, SelectMode.SelectRead))                  {                    if (clientSocket.Available > 0)                    {                      len = clientSocket.Client.Receive(responseBody, sum, (1024 * 200) - sum, SocketFlags.None);                      if (len > 0)                      {                        sum += len;                      }                    }                    else                    {                      break;                    }                  }                }              }              //判断是否gzip              if (server.headers.ContainsKey(Content_Encoding))              {                server.body = unGzip(responseBody, sum, encod);              }              else              {                server.body = encod.GetString(responseBody, 0, sum);              }              }          }         }      }      catch (Exception e)      {        Exception ee = new Exception("HTTP发包错误！错误消息：" + e.Message + e.TargetSite.Name + "----发包编号：" + index);        throw ee;      }      finally      {        sw.Stop();        server.length = sum;        server.runTime = (int)sw.ElapsedMilliseconds;        if (clientSocket != null)        {          clientSocket.Close();        }      }      return server;     }     private static bool ValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)    {      return true;    }    private static ServerInfo sendHTTPSRequest(int count, String host, int port, String payload, String request, int timeout, String encoding, Boolean foward_302)    {      String index = Thread.CurrentThread.Name + HTTP.index;      Stopwatch sw = new Stopwatch();      sw.Start();      ServerInfo server = new ServerInfo();       int sum = 0;       TcpClient clientSocket = null; ;       try      {         if (port > 0 && port <= 65556)        {           TimeOutSocket tos = new TimeOutSocket();          clientSocket = tos.Connect(host, port, timeout);          if (sw.ElapsedMilliseconds >= timeout)          {            return server;          }          clientSocket.SendTimeout = timeout - tos.useTime;           SslStream ssl = null;          if (clientSocket.Connected)          {            ssl = new SslStream(clientSocket.GetStream(), false, new RemoteCertificateValidationCallback(ValidateServerCertificate));            SslProtocols protocol = SslProtocols.Ssl3 | SslProtocols.Ssl2 | SslProtocols.Tls;            ssl.AuthenticateAsClient(host, null, protocol, false);            if (ssl.IsAuthenticated)            {              checkContentLength(ref server, ref request);              server.request = request;              byte[] requestByte = Encoding.UTF8.GetBytes(request);              ssl.Write(requestByte);              ssl.Flush();            }          }          server.request = request;          byte[] responseBody = new byte[1024 * 1000];          int len = 0;          //获取header头          String tmp = "";           StringBuilder sb = new StringBuilder();          StringBuilder bulider = new StringBuilder();          clientSocket.ReceiveTimeout = timeout - (int)sw.ElapsedMilliseconds;          do          {            byte[] responseHeader = new byte[1];            int read = ssl.ReadByte();             char c = (char)read;            sb.Append(c);            if (c.Equals(T))            {              tmp = String.Concat(sb[sb.Length - 4], sb[sb.Length - 3], sb[sb.Length - 2], c);            }           } while (!tmp.Equals(CTRL) && sw.ElapsedMilliseconds < timeout);           server.header = sb.ToString().Replace(CTRL, "");          String[] headers = Regex.Split(server.header, CT);          //处理header          doHeader(ref server, ref headers);          //自动修正编码          if (!String.IsNullOrEmpty(server.encoding))          {            encoding = server.encoding;          }          Encoding encod = Encoding.GetEncoding(encoding);          //302 301跳转          if ((server.code == 302 || server.code == 301) && foward_302)          {             int urlStart = server.request.IndexOf(" ");            int urlEnd = server.request.IndexOf(" HTTP");            if (urlStart != -1 && urlEnd != -1)            {              String url = server.request.Substring(urlStart + 1, urlEnd - urlStart - 1);              if (!server.headers["location"].StartsWith("/") && !server.headers["location"].StartsWith("https"))              {                server.request = server.request.Replace(url, Tools.getCurrentPath(url) + server.headers["location"]);              }              else              {                server.request = server.request.Replace(url, server.headers["location"]);              }               return sendHTTPSRequest(count, host, port, payload, server.request, timeout, encoding, false);            }           }            //根据请求头解析          if (server.headers.ContainsKey(Content_Length))          {            int length = int.Parse(server.headers[Content_Length]);            while (sum < length && sw.ElapsedMilliseconds < timeout)            {              len = ssl.Read(responseBody, sum, length - sum);              if (len > 0)              {                sum += len;              }            }          }          //解析chunked传输          else if (server.headers.ContainsKey(Transfer_Encoding))          {            //读取长度            int chunkedSize = 0;            byte[] chunkedByte = new byte[1];            //读取总长度            sum = 0;            do            {              String ctmp = "";              do              {                len = ssl.Read(chunkedByte, 0, 1);                ctmp += Encoding.UTF8.GetString(chunkedByte);               } while (ctmp.IndexOf(CT) == -1 && sw.ElapsedMilliseconds < timeout);               chunkedSize = Tools.convertToIntBy16(ctmp.Replace(CT, ""));               //chunked的结束0 是结束标志，单个chunked块结束              if (ctmp.Equals(CT))              {                continue;              }              if (chunkedSize == 0)              {                //结束了                break;              }              int onechunkLen = 0;               while (onechunkLen < chunkedSize && sw.ElapsedMilliseconds < timeout)              {                len = ssl.Read(responseBody, sum, chunkedSize - onechunkLen);                if (len > 0)                {                  onechunkLen += len;                  sum += len;                }              }               //判断            } while (sw.ElapsedMilliseconds < timeout);          }          //connection close方式或未知body长度          else          {            while (sw.ElapsedMilliseconds < timeout)            {              if (clientSocket.Client.Poll(timeout, SelectMode.SelectRead))              {                if (clientSocket.Available > 0)                {                  len = ssl.Read(responseBody, sum, (1024 * 200) - sum);                  if (len > 0)                  {                    sum += len;                  }                }                else                {                  break;                }              }            }          }          //判断是否gzip          if (server.headers.ContainsKey(Content_Encoding))          {            server.body = unGzip(responseBody, sum, encod);          }          else          {            server.body = encod.GetString(responseBody, 0, sum);          }        }       }      catch (Exception e)      {        Exception ee = new Exception("HTTPS发包错误！错误消息：" + e.Message + "----发包编号：" + index);        throw ee;      }      finally      {        sw.Stop();        server.length = sum;        server.runTime = (int)sw.ElapsedMilliseconds;         if (clientSocket != null)        {          clientSocket.Close();        }      }      return server;     }     public static String unGzip(byte[] data, int len, Encoding encoding)    {       String str = "";      MemoryStream ms = new MemoryStream(data, 0, len);      GZipStream gs = new GZipStream(ms, CompressionMode.Decompress);      MemoryStream outbuf = new MemoryStream();      byte[] block = new byte[1024];       try      {         while (true)        {          int bytesRead = gs.Read(block, 0, block.Length);          if (bytesRead <= 0)          {            break;          }          else          {            outbuf.Write(block, 0, bytesRead);          }        }        str = encoding.GetString(outbuf.ToArray());      }      catch (Exception e)      {        Tools.SysLog("解压Gzip发生异常----" + e.Message);      }      finally      {        outbuf.Close();        gs.Close();        ms.Close();       }      return str;     }    public static String getHTMLEncoding(String header, String body)    {      if (String.IsNullOrEmpty(header) && String.IsNullOrEmpty(body))      {        return "";      }      body = body.ToUpper();      Match m = Regex.Match(header, @"charsets*=s*""?(?<charset>[^""]*)", RegexOptions.IgnoreCase);      if (m.Success)      {        return m.Groups["charset"].Value.ToUpper();      }      else      {        if (String.IsNullOrEmpty(body))        {          return "";        }        m = Regex.Match(body, @"charsets*=s*""?(?<charset>[^""]*)", RegexOptions.IgnoreCase);        if (m.Success)        {          return m.Groups["charset"].Value.ToUpper();        }      }      return "";    }  }}
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