最近项目需要接口传输，于是乎找了那个选择哪个语言，选择node,而且是https模式！
找了好久才解决跨域问题！废话不多说，直接上代码
```python
let mysql = require('mysql');
let express = require('express');
let app = express();
let https = require("https");
let fs = require("fs");
// Configuare https
const httpsOption = {
key : fs.readFileSync("./https/3_jdong.xuexuebang.cn.key"),//https证书key
cert: fs.readFileSync("./https/2_jdong.xuexuebang.cn.crt")//https证书crt
}
//链接数据库
let connection = mysql.createConnection({
host : '127.0.0.1',
port : '3306',
database : 'sz',
user : 'soubei',
password : 'soubei',
})
connection.connect();
//解决跨域问题
app.all("*",function (req, res, next) { //允许所有请求方式
res.header("Access-Control-Allow-Origin","*");//所有
res.header("Access-Control-Allow-Headers","content-type")//post
next()
})
app.get('/userlist',function(req,res){
shop_name = req.query.shop_name;
connection.query('SELECT * from `order` where orderStatus="暂停" ',function(error,results,fileds){
if(error) throw error;
res.header("Access-Control-Allow-Origin", "*");
res.header('Access-Control-Allow-Headers', 'Content-type');
res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS,PATCH");
res.header('Access-Control-Max-Age',1728000);//预请求缓存20天
res.writeHead(200,{"Content-Type":"text/json;chartset=utf-8"})
data = []
// console.log('SELECT skuId from `cmf_order_sku` where shop_name="'+shop_name+'" group by skuId')
connection.query('SELECT skuId from `cmf_order_sku` where shop_name="'+shop_name+'" group by skuId',function(error,result,fileds){
if (result !=''){
res.end(JSON.stringify(result))
}
if (error == null){
res.end(JSON.stringify('请求失败'))
}
})
})
})
https.createServer(httpsOption, app).listen(8080,function(){
// let host = server.address().address;
// let port = server.address().port;
console.log("应用实例，运行在http://%s:%s")
});
```
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