C # Use SOCKET to send an HTTP request example

2. Call Code
3. Private void button#click (Object sender, eventargs E)
4. {
5. String urlstr = This. texturl. text;
7. If (urlstr = NULL | "". Equals (urlstr ))
8. {
9. MessageBox. Show ("the address to be asked! ");
10. Return;
11. }
13. Int Port = 80;
15. Try
16. {
17. Port = convert. toint32 (this. textport. Text );
18. }
19. Catch
20. {
21. MessageBox. Show ("enter the correct port ");
22. }
24. // Can be empty
25. String Path = "/" + this. textfile. text;
27. This. textbox1.text = "";
28. This. Conn. startaccess (urlstr, port, path, this. textbox1 );
29. }

 

1. Using system;
2. Using system. Collections. Generic;
3. Using system. LINQ;
4. Using system. text;
5. Using system. net;
6. Using system. net. Sockets;
7. Using system. Windows. forms;
9. Namespace windowsformsapplication3
10. {
11. Class myconnection
12. {
13. Public void startaccess (string urlstr, int port, string path, textbox List)
14. {
15. Byte [] DATA = new byte [1024];
16. Iphostentry gist = DNS. gethostbyname (urlstr );
18. // Obtain the IP address of the accessed URL
19. IPaddress IP = gist. Addresslist [0];
20. Ipendpoint ipend = new ipendpoint (IP, Port );
22. // Use the TCP stream type (IPv4)
23. Socket socket = new socket (addressfamily. InterNetwork, sockettype. Stream, protocoltype. TCP );
25. Try
26. {
27. Socket. Connect (ipend );
28. }
29. Catch (socketexception E)
30. {
31. MessageBox. Show ("An error occurred while connecting to the accessed server! ");
32. Console. Write (E. tostring ());
33. Return;
34. }
35. // The relative address of the request. This parameter is optional if you access www.baidu.com directly. It can be blank.
37. Stringbuilder Buf = new stringbuilder ();
38. Buf. append ("get"). append (PATH). append ("HTTP/1.0/R/N ");
39. Buf. append ("Content-Type: Application/X-WWW-form-urlencoded/R/N ");
40. Buf. append ("/R/N ");
41. Byte [] MS = system. Text. utf8encoding. utf8.getbytes (BUF. tostring ());
43. // Send
44. Socket. Send (MS );
47. Int Recv = 0;
49. Do
50. {
51. Recv = socket. Receive (data );
52. // If the requested page meta specifies that the encoding of the page is gb2312, you need to use the corresponding encoding to convert bytes.
53. // List. Text + = (encoding. utf8.getstring (data, 0, Recv ));
54. List. Text + = (encoding. Default. getstring (data, 0, Recv ));
56. } While (Recv! = 0 );
58. // Disable last sending and receiving
59. Socket. Shutdown (socketshutdown. Both );
60. Socket. Close ();
61. }
62. }
63. }