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Firestore / gRPC behind a corporate firewall / proxy

由 懵懂的女人 提交于 2019-12-05 04:26:58

As can be seen in the source code, the node.js client library accesses Firestore through gRPC at firestore.googleapis.com on port 443.

So for your application to work with Firestore successfully, the firewall/proxy must allow access to firestore.googleapis.com on port 443 via TCP. Why this doesn't work at the moment is a question to the current configuration of the firewall/proxy, most probably it is blocked by default in some catch-all rule.

Warning: GRPC currently only supports HTTP Basic Auth for proxies. The proxy authentication method here will currently not work, if the proxy requires authentication via Digest. I have filed an issue for it here: https://github.com/grpc/grpc/issues/18250

The solution is to set the environment variables for http_proxy and https_proxy before loading the Electron BrowserWindow that initiates the Firestore connection.

An possible way is to ask for proxy credentials in the BrowserWindow and return them to the main process using an event (in this example set-proxy-url). After setting the environment variables correctly for gRPC to pick them up, reload the BrowserWindow (or open a new one).

Example code (main):

ipcMain.on('set-proxy-url', (event: Electron.Event, arg: any) => {
  if (arg.authInfo.isProxy) {
    // In our case this is a http proxy (HTTPS is tunneled)
    const httpUrl = `http://${arg.user}:${arg.pass}@${arg.authInfo.host}:${arg.authInfo.port}`

    process.env.http_proxy = httpUrl
    process.env.https_proxy = httpUrl

    // TODO: Reload the BrowserWindow that uses Firestore
  }
})

Example code (renderer):

ipcRenderer.send('set-proxy-url', {
     authInfo, // This comes from app.on('login', (event, webContents, request, authInfo, callback) => { ... }
     user: usernameRetrievedFromUser,
     pass: passwordRetrievedFromUser
})
标签
node.js
firebase
google-cloud-firestore
grpc-node
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