C++ http get下载网页源码

最新推荐文章于 2025-05-18 15:51:31 发布

转载最新推荐文章于 2025-05-18 15:51:31 发布 · 886 阅读

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#C++ http get

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本文展示了如何使用C++中的WinInet和Winsock库来实现HTTP请求，包括打开URL、读取网页内容并打印。

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例子1：wininet

#include <stdio.h>

#include <windows.h>
#include <wininet.h>
#define MAXSIZE 1024
#pragma comment(lib, "Wininet.lib")
void urlopen(_TCHAR*);

int _tmain(int argc, _TCHAR* argv[])
{
urlopen(_T("http://www.jb51.net"));
return 0;
}
void urlopen(_TCHAR* url)
{
HINTERNET hSession = InternetOpen(_T("UrlTest"), INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
if(hSession != NULL)
{
HINTERNET hHttp = InternetOpenUrl(hSession, url, NULL, 0, INTERNET_FLAG_DONT_CACHE, 0);
if (hHttp != NULL)
{
wprintf_s(_T("%s\n"), url);
BYTE Temp[MAXSIZE];
ULONG Number = 1;
while (Number > 0)
{
InternetReadFile(hHttp, Temp, MAXSIZE - 1, &Number);
Temp[Number] = '\0';
printf("%s", Temp);
}
InternetCloseHandle(hHttp);
hHttp = NULL;
}
InternetCloseHandle(hSession);
hSession = NULL;
}

}

例子2：winsock

#include <winsock2.h>
#include<windows.h>
#include<stdio.h>
#pragma comment(lib, "ws2_32.lib")

int main(int argc, char* argv[])
{
char server_name[256]= "www.163.com";

WSADATA wsaData;
struct sockaddr_in srv_addr;

if (WSAStartup(0x202,&wsaData) == SOCKET_ERROR) {
WSACleanup();
return -1;
}

SOCKET cli_sock=socket(PF_INET,SOCK_STREAM,0);
if (cli_sock==INVALID_SOCKET)
return -1;

// connect to server

srv_addr.sin_family = AF_INET;
LPHOSTENT lphost = gethostbyname(server_name);
if (lphost != NULL)
srv_addr.sin_addr.s_addr = ((LPIN_ADDR)lphost->h_addr)->s_addr;
srv_addr.sin_port= ntohs(80);
if (connect(cli_sock,(LPSOCKADDR)&srv_addr,sizeof(srv_addr))==SOCKET_ERROR){
return -1;
}

char sz[]="GET / HTTP/1.1\r\nHost:www.163.com\r\n\r\n";
int retval = send(cli_sock,sz,sizeof(sz)-1,0);
if( SOCKET_ERROR == retval )
return 0;
char buffer[1024]={0};
while( SOCKET_ERROR != retval ){
retval = recv(cli_sock ,buffer,1000,0);
printf("%s\n",buffer);
}
closesocket(cli_sock);
return 0;
}