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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