Created
February 1, 2019 09:14
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jsonp example
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> | |
| <title>jsonp请求测试</title> | |
| </head> | |
| <body> | |
| <script> | |
| function jsonp({ url, params, callback }) { | |
| return new Promise((resolve, reject) => { | |
| let script = document.createElement('script') | |
| window[callback] = function(data) { | |
| resolve(data) | |
| document.body.removeChild(script) | |
| } | |
| params = { ...params, callback } // wd=b&callback=show | |
| let arrs = [] | |
| for (let key in params) { | |
| arrs.push(`${key}=${params[key]}`) | |
| } | |
| script.src = `${url}?${arrs.join('&')}` | |
| document.body.appendChild(script) | |
| }) | |
| } | |
| jsonp({ | |
| url: 'http://localhost:3000/say', | |
| params: { wd: 'Iloveyou' }, | |
| callback: 'show' | |
| }).then(data => { | |
| console.log(data) | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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| let express = require('express') | |
| let app = express() | |
| app.get('/say', function(req, res) { | |
| let { wd, callback } = req.query | |
| console.log(wd) // Iloveyou | |
| console.log(callback) // show | |
| res.end(`${callback}('我不爱你')`) | |
| }) | |
| app.listen(3000) |
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