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+## 帮郑一做node后端记录
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+** node express做restful接口时设置统一请求头或设置响应信息
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+``` javascript
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+var express = require('express');
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+var app = express();
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+// 通配设置统一响应头
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+app.all('*', async function (req, res,next) {
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+ //查
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+ var data= '{}';
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+ // 设置头部信息
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+ res.header('Access-Control-Allow-Origin', '*');
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+ res.header("Content-Type", "application/json;charset=utf-8");
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+ if(req.originalUrl == '/clubs') {
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+ data = await clubs()
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+ }
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+ ///next()
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+ res.end(data)
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+})
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+var server = app.listen(8089, function () {
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+ var port = server.address().port
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+ console.log("应用实例,访问地址为 http://localhost:", port)
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+})
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+```
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