Use socket to simulate http requests and socket to simulate requests

Use socket to simulate http requests and socket to simulate requests

Using System; using System. collections. generic; using System. linq; using System. net; using System. net. sockets; using System. text; using System. threading. tasks; class HttpHelper {# region simulate client socket connection private static Socket ConnectSocket (string server, int port) {Socket s = null; IPHostEntry hostEntry = null; // Get host related information. hostEntry = Dns. getHostEntry (server); // Loop through the AddressList to obtain the supported AddressFamily. this is to avoid // an exception that occurs when the host IP Address is not compatible with the address family // (typical in the IPv6 case ). foreach (IPAddress address in hostEntry. addressList) {IPEndPoint ipe = new IPEndPoint (address, port); Socket tempSocket = new Socket (ipe. addressFamily, SocketType. stream, ProtocolType. tcp); tempSocket. connect (ipe); if (tempSocket. connected) {s = tempSocket; break;} else {continue ;}}return s ;}# endregion # The main method of the region request is the header of the http request, you can use the packet capture tool to obtain the domain name or IP address of the server. The port http protocol is generally 80 public static string SocketSendReceive (string request, string server, int port) {try {Byte [] bytesSent = Encoding. ASCII. getBytes (request); Byte [] bytesReceived = new Byte [655350]; // create a connection Socket s = ConnectSocket (server, port); if (s = null) return ("Connection failed"); // sends the content. s. send (bytesSent, bytesSent. length, 0); // Receive the server home page content. int bytes = 0; string page = "Default HTML page on" + server + ": \ r \ n"; // accept the returned content. do {bytes = s. receive (bytesReceived, bytesReceived. length, 0); page = page + Encoding. UTF8.GetString (bytesReceived, 0, bytes);} while (bytes> 0); return page;} catch {return string. empty ;}# endregion}

　　

Using System; using System. collections. generic; using System. IO; using System. linq; using System. text; using System. threading. tasks; using System. reflection; class Program {public static string HeadlerInit () {StringBuilder sb = new StringBuilder (); sb. appendLine ("GET http://www.baidu.com/ HTTP/1.1 "); sb. appendLine ("Host: www.baidu.com"); sb. appendLine ("Connection: keep-alive"); sb. appendLine ("Accept: text/html, application/xhtml + xml, application/xml; q = 0.9, image/webp, */*; q = 0.8"); sb. appendLine ("User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36"); sb. appendLine ("Accept-Encoding: deflate, sdch"); sb. appendLine ("Accept-Language: zh-CN, zh; q = 0.8"); sb. appendLine ("\ r \ n"); // this must be done. Otherwise, no data may return sb. toString ();} static void Main (string [] args) {string getStrs = HeadlerInit (); string getHtml = HttpHelper. socketSendReceive (getStrs, "www.baidu.com", 80); Console. writeLine (getHtml );}}