如何使用node.js从API调用打开数据并将数据写入文件

Question

I wrote an API and the response from that API is array of data. Whenever the response coming from that API i want to store that response in file that is.txt format. I tried but it shows an error like "No such directory or NO such path". How to create file and write data into file from API using node.js. This is the code i wrote :

    exports.Entry = functions.https.onRequest((req, res) => {
      var fs = require('fs');
      var a = ['6', '7', '8'];
      var b = ['22', '27', '20'];
      var eachrecord = [];

      for (var i = 0; i < a.length; i++) {
        eachrecord += a + b;
      }

      console.log("eachrecord is", eachrecord);

      //Writing each record value into file
     fileWriteSync('./filewriting1.txt');
     function fileWriteSync(filePath){
  var fd = fs.openSync(filePath,'w');
  var length = eachrecord.length;
  for(i = 0;i<length;i++){
    var eachrecordwrite = fs.writeSync(fd,eachrecord[i] + '\n',null,null);

    console.log("hii",eachrecord[i]);

  }
  fs.closeSync(fd);
}
    });

How to write data into file from API using node.js

Answer 1

You can only write files to os.tmpdir() , which is /tmp on Cloud Functions. /tmp is a memory based filesystem. Everything else is read-only. If you don't intend to do anything with that written file, it will consume memory indefinitely. You should always delete files written to /tmp before the function terminates. Writing a file to memory like this is almost certainly not the best solution to a problem, unless there is a consumer for that content that can only read it off the local filesystem.

Since you haven't really said what problem you're trying to solve, it's not possible to say what you could be doing instead (that's something for a different question). But anyway, you can only write to /tmp .