C++发送HTTP请求---亲测可行(转)

转自：http://hi.baidu.com/benbearlove/item/1671c23017575825b3c0c53f

环境:xp sp3,vs2008,在静态库中使用 MFC

1. #include <afxwin.h>
2. #include <stdio.h>
3. #include <windows.h>
4. #include <string>
5. #include "Wininet.h"
6. #pragma comment(lib,"Wininet.lib")
7. //模拟浏览器发送HTTP请求函数
8. std::string HttpRequest(char * lpHostName,short sPort,char * lpUrl,char * lpMethod,char * lpPostData,int nPostDataLen)
9. {
10. HINTERNET hInternet,hConnect,hRequest;
11. BOOL bRet;
12. std::string strResponse;
13. hInternet = (HINSTANCE)InternetOpen("User-Agent",INTERNET_OPEN_TYPE_PRECONFIG,NULL,NULL,0);
14. if(!hInternet)
15. goto Ret0;
16. hConnect = (HINSTANCE)InternetConnect(hInternet,lpHostName,sPort,NULL,"HTTP/1.1",INTERNET_SERVICE_HTTP,0,0);
17. if(!hConnect)
18. goto Ret0;
19. hRequest = (HINSTANCE)HttpOpenRequest(hConnect,lpMethod,lpUrl,"HTTP/1.1",NULL,NULL,INTERNET_FLAG_RELOAD,0);
20. if(!hRequest)
21. goto Ret0;
22. //bRet = HttpAddRequestHeaders(hRequest,"Content-Type: application/x-www-form-urlencoded",Len(FORMHEADERS),HTTP_ADDREQ_FLAG_REPLACE | HTTP_ADDREQ_FLAG_ADD);
23. //if(!bRet)
24. //goto Ret0;
25. bRet = HttpSendRequest(hRequest,NULL,0,lpPostData,nPostDataLen);
26. while(TRUE)
27. {
28. char cReadBuffer[4096];
29. unsigned long lNumberOfBytesRead;
30. bRet = InternetReadFile(hRequest,cReadBuffer,sizeof(cReadBuffer) - 1,&lNumberOfBytesRead);
31. if(!bRet || !lNumberOfBytesRead)
32. break;
33. cReadBuffer[lNumberOfBytesRead] = 0;
34. strResponse = strResponse + cReadBuffer;
35. }
36. Ret0:
37. if(hRequest)
38. InternetCloseHandle(hRequest);
39. if(hConnect)
40. InternetCloseHandle(hConnect);
41. if(hInternet)
42. InternetCloseHandle(hInternet);
43. return strResponse;
44. }
45. void main()
46. {
47. //CString strResponse = HttpRequest("translate.google.com",80,"/translate_t?langpair=en|zh-CN","POST","hl=zh-CN&ie=UTF-8&text=this is me&langpair=en|zh-CN",strlen("hl=zh-CN&ie=UTF-8&text=this is me&langpair=en|zh-CN"));
48. std::string strResponse = HttpRequest("www.hao123.com",80,NULL,"GET",NULL,0);
49. FILE * fp = fopen("C:\\123.htm","wb");
50. fwrite(strResponse.c_str(),strResponse.length(),1,fp);
51. fclose(fp);
52. }