Vue cross-domain processing issues (detailed tutorial)

This article gives you a detailed introduction to the way Vue handles cross-domain problems and an introduction to related knowledge points. Friends who are interested in this can learn from it.

Set express proxy request

In a project based on vue-cli, configure the development environment (config/dev.env.js) Setting up a proxy in can redirect all requests starting with /apidomain to the target interface through the express server started by

npm run dev

Official document: https://vuejs-templates.github.io/webpack/proxy.html

proxyTable: {
  '/apidomain':{
  target:'http://localhost:prot',//或ip或域名。
  changeOrigin:true,
  pathRewrite: {
   '^/apidomain': ''
  }
  }
 },

To access h5 on the LAN through IP, add the host parameter when starting the development server That is

The dev command configuration of package.json is as follows

"dev": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js --host 0.0.0.0",

Turn off the chrome security policy to achieve cross-domain

Create a new bat file in windows and paste it The following command can open the CORS cross-domain settings of the asp.net core server in this mode

cd "C:\Program Files (x86)\Google\Chrome\Application" 
chrome.exe --disable-web-security --user-data-dir=c:/CorsUserData

Official document: https://docs.microsoft.com/ zh-cn/aspnet/core/security/cors

In the actual setting, adding header parameters on the h5 side generates a preflight (OPTIONS) request. After reading the above article, The general parameters have been modified into the query parameters

1. Add cors service

public void ConfigureServices(IServiceCollection services)
{
 //若只有部分接口则定义一个或多个命名的 CORS 策略，并在运行时按名称然后选择的策略,通过特性标记去设置跨域 详情见文档
 services.AddCors();
}

2. Enable middleware

//读取配置文件中设置的允许跨域的域名 CorsOrigins为一个数组 设置["*"]则会允许所有
var origins = Configuration.GetSection("CorsOrigins").GetChildren().Select(s => s.Value).ToArray();
app.UseCors(e =>
{
 e.WithOrigins(origins).AllowAnyHeader().AllowAnyMethod().AllowCredentials();
});

//Startup文件中Configuration对象的获取
public IConfiguration Configuration { get; }
public Startup()
{
 var builder = new ConfigurationBuilder()//...AddJsonFile($"appsettings.json");
 Configuration = builder.Build();
}

above I compiled it for everyone. I hope it will be helpful to everyone in the future.

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