將塊加載到客戶端的問題

Question

我正在嘗試創建一個 readableStream ，我將通過它發送數據塊（在這種情況下為 html ）。 問題是，即使我設法獲取一大塊數據， res.write()方法什么也不做，如果我記錄它只會返回 false。 我想知道這是為什么？

import { createServer } from 'http'
import { createReadStream } from 'fs'

const server = createServer((req, res) => {
    if (req.method === 'GET') {
        if (req.url === '/') {
            res.writeHead(200, { 'Content-Type': 'text/html' })

            let readStream = createReadStream('./src/public/index.html', { encoding: 'utf8' })

            readStream.on('data', (chunk) => {
                console.log(chunk)
                // html code
                res.write(chunk)
                // does nothing
            })
            res.end()
        }
    }
})

const PORT = 3000 || 8080

server.listen(PORT, () => { console.log(server.address()) })

Answer 1

您應該添加 pipe function 而不是定期寫入響應

  readStream.on('open', function () {
    // This just pipes the read stream to the response object (which goes to the client)
    readStream.pipe(res);
  });

  // This catches any errors that happen while creating the readable stream (usually invalid names)
  readStream.on('error', function(err) {
    res.status(500).end(err);
  });

更多信息： https://nodejs.org/en/knowledge/advanced/streams/how-to-use-fs-create-read-stream/

我希望它對你有幫助:)