Question

更新：添加了完整的服务器代码。请注意，静态内容的路由工作正常，只有相对于Dat的路由失败。另外，我正在运行没有10.8.0的节点micro -l tcp://0.0.0.0:$PORT，服务器运行了dat-node

我正在尝试使用Zeit micro运行const { send } = require('micro') const Dat = require('dat-node') const handler = require('serve-handler') const { router, get, post } = require('microrouter') const static = async (request, response) => { await handler(request, response, { // static app folder public: 'static', // javascript header for es modules headers: { source: '**/*.mjs', headers: [{ key: 'Content-Type', value: 'text/javascript' }] }, // no directory listing directoryListing: false }) } const createGame = (request, response) => { Dat('./game', (err, dat) => { if (err) throw err let progress = dat.importFiles({watch: true}) progress.on('put', function (src, dest) { console.log('Importing ', src.name, ' into archive') }) dat.joinNetwork() send(response, 200, { key: dat.key.toString('hex') }) }) } const joinGame = (request, response) => { } module.exports = router( post('/game', createGame), post('/game/:game', joinGame), get('/*', static) )。我有这个微服务

send

我只想创建一个dat存档并返回公钥，但是当我致电(node:2054) UnhandledPromiseRejectionWarning: Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client at ServerResponse.setHeader (_http_outgoing.js:469:11) at send (/home/ubuntu/workspace/node_modules/micro/lib/index.js:72:8) at Dat (/home/ubuntu/workspace/index.js:35:5) at /home/ubuntu/workspace/node_modules/dat-node/index.js:112:9 at apply (/home/ubuntu/workspace/node_modules/thunky/index.js:44:12) at process._tickCallback (internal/process/next_tick.js:63:19)(node:2054) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)(node:2054) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.时，我会收到此错误

{{1}}

因此，我不确定标头发送到的位置，也许我只是以错误的方式处理Dat回调？不确定如何实施此服务。

Answer 1

问题似乎与micro的使用有关，与dat-node无关。在微型计算机中进行异步工作时，您需要使用Javascript（承诺）的async/await工具。

这是固定代码：

const createGame = async (request, response) => {
  var key = await new Promise((resolve) => {
    Dat('./game', (err, dat) => {
      if (err) throw err

      let progress = dat.importFiles({watch: true})

      progress.on('put', function (src, dest) {
        console.log('Importing ', src.name, ' into archive')
      })

      dat.joinNetwork()
      resolve(dat.key.toString('hex'))
    })
  })
  console.log('sending')
  send(response, 200, { key })
}

Answer 2

如果您导出该功能，则该代码段将起作用。用micro whatever.js运行，然后卷曲到localhost：3000，它应该返回密钥。

const { send } = require('micro')
const Dat = require('dat-node')

module.exports = (request, response) => {
  Dat('./game', async (err, dat) => {
    if (err) throw err

    let progress = dat.importFiles({watch: true})

    progress.on('put', function (src, dest) {
      console.log('Importing ', src.name, ' into archive')
    })

    dat.joinNetwork()

    send(response, 200, { key: dat.key.toString('hex') })
 })
}

如何将dat-node作为微服务运行？

2 个答案: