C++ http请求

柔情只为你懂 2022-08-19 04:46 183阅读 0赞

实例 代码

#include "stdafx.h"
    #include <stdio.h>
    #include <windows.h>
    #include <wininet.h>
    #include <iostream>
    #include <string>
    using namespace std;
    
    #define MAXSIZE 1024
    #pragma comment(lib, "Wininet.lib") 
    
    
    bool  Urlopen(const _TCHAR* url, BYTE *&urlContent)
    {
    	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)
    		{
    			urlContent = new (std::nothrow) BYTE[MAXSIZE];
    			if(NULL == urlContent)
    			{
    				return false;
    			}
    			memset(urlContent, 0, MAXSIZE);
    			ULONG Number = 1;
    
    			bool bInternetReadFile = false;
    
    			bInternetReadFile = InternetReadFile(hHttp, urlContent, MAXSIZE - 1, &Number);
    			if(!bInternetReadFile)
    			{
    				return false;
    			}
    
    			if(Number <= 0 || Number >= <span style="font-family: Arial, Helvetica, sans-serif;">MAXSIZE</span>)
    			{
    				return false;
    			}
    
    			urlContent[Number] = '\0';
    
    			InternetCloseHandle(hHttp);
    			hHttp = NULL;
    
    			return true;
    		}
    		InternetCloseHandle(hSession);
    		hSession = NULL;
    	} 
    
    	return false;
    }
    
    int _tmain(int argc, _TCHAR* argv[])
    {
    	wstring wstr = _T("http://120.25.242.254/WxService/test?UserId=niebingyu&OrgCode=YUTONGXUN5.0");
    
    	BYTE* byte = NULL;
    	
    	bool bUrlopen = false;
    	bUrlopen = Urlopen(wstr.c_str(), byte);
    	if(NULL == byte)
    	{
    		cout<<"byte is NULL"<<endl;
    		return 0;
    	}
    
    	if(!bUrlopen)
    	{
    		cout<<"Urlopen return false"<<endl;
    		return 0;
    	}
    
    	cout<<byte<<endl;
    
    	if(NULL != byte)
    	{
    		delete byte;
    		byte = NULL;
    	}
    
    	return 0;
    }