C++使用http请求，亲测可用，VS2008编译运行通过

1. int CMyFunctionsDlg::request(char* hostname, char* api, char* parameters)
2. {
3. WSADATA WsaData;
4. WSAStartup(0x0101, &WsaData);
5. //初始化socket
6. struct hostent* host_addr = gethostbyname(hostname);
7. if (host_addr == NULL)
8. {
9. //      cout<<"Unable to locate host"<<endl;
10. return -103;
11. }
12. sockaddr_in sin;
13. sin.sin_family = AF_INET;
14. sin.sin_port = htons((unsigned short)80);
15. sin.sin_addr.s_addr = *((int*)*host_addr->h_addr_list);
16. int sock = socket(AF_INET, SOCK_STREAM, 0);
17. if (sock == -1)
18. {
19. return -100;
20. }
21. //建立连接
22. if (connect(sock, (const struct sockaddr *)&sin, sizeof(sockaddr_in) ) == -1)
23. {
24. //        cout<<"connect failed"<<endl;
25. return -101;
26. }
27. //初始化发送信息
28. char send_str[2048] = {0};
29. //头信息
30. strcat(send_str, "POST ");
31. strcat(send_str, api);
32. strcat(send_str, " HTTP/1.1\r\n");
33. strcat(send_str, "Host: ");
34. strcat(send_str, hostname);
35. strcat(send_str, "\r\n");
36. strcat(send_str, "Connection: keep-alive\r\n");
37. char content_header[100];
38. sprintf(content_header,"Content-Length: %d\r\n", strlen(parameters));
39. strcat(send_str, content_header);
40. strcat(send_str, "Cache-Control: max-age=0\r\n");
41. strcat(send_str, "Origin: http://www.hao123.com\r\n");
42. strcat(send_str, "User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/15.0.849.0 Safari/535.1\r\n");
43. strcat(send_str, "Content-Type: application/x-www-form-urlencoded\r\n");
44. strcat(send_str, "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n");
45. strcat(send_str, "Referer: http://www.hao123.com/\r\n");
46. strcat(send_str, "Accept-Encoding: gzip,deflate,sdch\r\n");
47. strcat(send_str, "Accept-Language: zh-CN,zh;q=0.8\r\n");
48. //  strcat(send_str, "Expect: 100-continue\r\n");
49. //内容信息
50. strcat(send_str, "\r\n");
51. strcat(send_str, parameters);
52. if (send(sock, send_str, strlen(send_str),0) == -1)
53. {
54. //        cout<<"send failed"<<endl;
55. return -101;
56. }
57. //获取返回信息
58. char recv_str[4096] = {0};
59. if (recv(sock, recv_str, sizeof(recv_str), 0) == -1)
60. {
61. //        cout<<"recv failed"<<endl;
62. return -101;
63. }
64. //    cout<<recv_str<<endl;
65. WSACleanup( );
66. return 0;
67. }

request("www.xxxx.com", "http://www.xxxx.com/client/data.php", "{\"request\":\"userLogin\",\"posts\":[{\"loginName\":\"123456\",\"password\":\"7890\"}]}");

http://blog.csdn.net/dingxz105090/article/details/41285149