"如何为 Google Cloud Functions 删除 tmpfs 或 \/tmp 目录中的文件？"

Question

I have a google cloud function I've written in Node.js which I have set to execute every 4 hours using the cloud scheduler. Basically the function populates a table I have in BigQuery. My function doesn't explicitly write anything to the tmp directory, it just stores things in local variables for streaming insertion into BigQuery like so:

var rows = []

// code which fills the rows array

await bigqueryClient
      .dataset(datasetId)
      .table(tableId)
      .insert(rows)

Answer 1

Your code will delete all files the next<\/strong> time it runs, but if you created a file with something like const ws = fs.createWriteStream('\/tmp\/${fileName}');<\/code> , the file will not be deleted until the next run.

const directory = '/tmp';
const fileName  = `test_file_1.gz`;
 
function doSomething() {
  return new Promise((resolve) => {   
    const ws = fs.createWriteStream(`/tmp/${fileName}`);
    resolve();
  });
}

function fileCleanup() {
  return new Promise((resolve) => {   
    fs.readdir(directory, (err, files) => {
      if (err) throw err;
      console.log(files);

      for (const file of files) {
        fs.unlink(path.join(directory, file), err => {
          if (err) throw err;
          console.log(`${file} was deleted`);
        });
      }
    });
    resolve();
  });
}

doSomething().then(() => { fileCleanup(); }).then(() => { res.status(200).send('OK'); }).catch((err) => { throw new Error(err); });