如何在浏览器中打开预览pdf，而不是下载
const http = require('http');
const nodefetch = require('node-fetch');
const PORT = 3000;
const server = http.createServer(async (req, res) => {
if (req.url === '/get-pdf' && req.method === 'GET') {
let PDF_URL = req.query.url
let pass = await checkUrl(PDF_URL)
if (!pass) {
res.send('Not Found');
return
}
// 请求第三方PDF文件
let data = null
try {
data = await nodefetch(PDF_URL, {
method: "GET",
headers: {
"Content-Type": "application/pdf",
}
})
} catch (error) {
data = {
body: 'error'
}
}
// 重点在这里
res.setHeader('Content-Type', 'application/pdf')
res.setHeader('Content-Disposition', 'inline')
data.body.pipe(res)
} else {
res.writeHead(404, { 'Content-Type': 'text/plain' });
res.end('Not Found');
}
});
function checkUrl(url){
// 可以配置白名单，或者域名校验一下
url = decodeURIComponent(url)
let domain = url.split('/')[2]
if (domain === 'localhost:3000'){
return true
} else {
return false
}
server.listen(PORT, () => {
console.log(`Server is listening on port ${PORT}`);
});