C++读取网络url文件内容

文件地址为“http://www.baidu.com/xxx.txt”

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1. // readTxt.cpp :Defines the entry point for the console application.  
2. //  
3.    
4. #include "stdafx.h"  
5. #include <Windows.h>  
6. #include <wininet.h>  
7. #include <string>  
8. using namespace std;  
9. #pragma comment(lib, "wininet.lib")  
10. #define BUF_SIZE 1024  
11.    
12. LPSTR GetInterNetURLText(LPSTR lpcInterNetURL, char* buff);  
13.    
14. int _tmain(int argc, _TCHAR* argv[])  
15. {  
16.     char buf[BUF_SIZE] = {0};  
17.     char url[MAX_PATH] = "http://www.baidu.com/xxx.txt";  
18.     GetInterNetURLText(url, buf);  
19.    
20.     return 0;  
21. }  
22.    
23. LPSTR GetInterNetURLText(LPSTR lpcInterNetURL, char* buff)  
24. {     
25.     HINTERNET hSession;     
26.     LPSTR lpResult = NULL;  
27.     hSession = InternetOpen("WinInet", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);     
28.     __try  
29.     {         
30.        if(hSession != NULL)          
31.        {            
32.            HINTERNET hRequest;              
33.            hRequest = InternetOpenUrlA(hSession,lpcInterNetURL, NULL,0, INTERNET_FLAG_RELOAD, 0);          
34.            __try           
35.            {                  
36.               if(hRequest != NULL)          
37.               {             
38.                   DWORD dwBytesRead;                    
39.                   char szBuffer[BUF_SIZE] = {0};  
40.    
41.                   if(InternetReadFile(hRequest, szBuffer, BUF_SIZE, &dwBytesRead))             
42.                   {                   
43.                      RtlMoveMemory(buff, szBuffer, BUF_SIZE);     
44.                      return 0;                
45.                   }                 
46.               }             
47.            }__finally       
48.            {                
49.               InternetCloseHandle(hRequest);    
50.            }         
51.        }     
52.     }__finally      
53.     {         
54.        InternetCloseHandle(hSession);    
55.     }     
56.     return lpResult;  
57. }