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How to solve cross domain problems

2022-06-30 12:38:00 【YF-SOD】

jsonp

utilize html in script Scripts do not resolve across domains .

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function getData(data) {
            console.log(data)
        }
    </script>
    <script src="http://localhost:8080"></script>
</body>
</html>

Server code

const http = require('http')
const server = http.createServer((req, res) =>
    let url = req.url
    // Set up 'Access-Control-Allow-Origin': '*' To solve the cross domain 
    //res.writeHead(200, {
    //    'content-type': 'application/json;charset=utf-8',
    //    'Access-Control-Allow-Origin': '*'
    //})
    res.write('getData("hello")')
    res.end()
})
server.listen(8080,()=>{
    console.log('localhost:8080')
})

This will print hello character string , Note the usual get and post The data returned from the request server is ‘getData("hello")' String , Only stay script In order to be js Code execution .