C++ simply realizes automatic program update

Many hxd of cf want to update the program easily, now let me explain the ideas by zfat

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Ideas

Get the content of the webpage and compare it with the program version

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Tip: The following is the content of this article, the following cases are for reference

1. Examples

The code is as follows (example):

string xiaves;
		cout << "是否下载beta版(1/2)";
		int betayes;
		cin >> betayes;
		if (betayes == 1) {
			xiaves = "beta.html";
		}
		else {
			xiaves = "update.html";
		}
		string wangye = "http://******/update/" + xiaves;
		LPCSTR wangzhi = wangye.c_str();
		HRESULT dyes;
		cout << "检查中" << endl;
		dyes = URLDownloadToFile(0, _T(wangzhi), _T("C:\\bugfixed_update.txt"), 0, NULL); //下载检测文件
		if (dyes == S_OK) //下载成功
		{
			string temp; //读取文件
			ifstream infile;
			infile.open("C:\\bugfixed_update.txt",ios::in | ios::trunc);
			ifstream readFile("C:\\bugfixed_update.txt");
			readFile >> temp;
			cout << temp << endl;
            readFile.close();
			if (temp == "0.4") {  //==后为当前版本  //诺后端与前端相同
				cout << "无版本更新";
				Sleep(100000);
				return 0;
			}
			else {
				cout << "检测到新版本" << endl; //不同
				cout << "是否立即安装(1/2)";
				cin >> betayes;
				if (betayes == 1) {
					string down = "http://****/download/" + xiaves;
					LPCSTR download = down.c_str();
					dyes = URLDownloadToFile(0, _T(download), _T("C:\\update.msi"), 0, NULL);
					if (dyes == S_OK) {
						system("start c:\\update.msi");
						system("del c:\\update.msi");
						return 0;
					}	
					else {
						cout << "下载失败" << endl;
				}
				else {
					return 0;
				}	
			}
		}
		else {
			cout << "检测失败" << endl;
		}
	}

2. Explanation of main functions

URLDownloadToFile 保存网页内容 不支持重定向(容易报毒
ifstream 恶心的文件与流 详情看https://www.runoob.com/cplusplus/cpp-files-streams.html

Other words

Like the web page, you can try github.io or gitee blog

to sum up

A simple idea

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How do I smell like marketing?!

by zfat 2021/1/24

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