var svgCaptcha = require(‘svg-captcha‘);
session.code = []
router.get(‘/bb‘, async (ctx, next) => {
ctx.set(‘Access-Control-Allow-Origin‘, ‘*‘);
var captcha = svgCaptcha.createMathExpr({
ignoreChars: ‘0o1i‘,
color:false,
noise:0
});
session.code.push(captcha.text)
ctx.body = captcha
})
原文：https://www.cnblogs.com/fm060/p/12910954.html