CODEWITHSUNDEEP
node.jsstringformattingfs
ang
ang

Reputation: 1581

How to Read Out txt File with Line Breaks in Node

I am trying to output a txt file with line breaks with the fs module in node.

Trial #1 - UTF8 Encoded

let list = req.body.L_.replace(/['"]+/g, '').replace(/\r\n/gi, '\\0x0D')

fs.writeFile('./_log/L_.replace(/\"/g, "") + '.txt', list, 'utf8', (err) => {
    if (err) throw err
})

Input

"0  1   ITEM    \r\n    2   2   ITEM    \r\n"

Output

0   1   ITEM    \u0A0   2   2   ITEM    \u0A

Expected Output

0   1   ITEM
2   2   ITEM

Trial #2 - Default Node fs Encoding

let list = req.body.L_.replace(/['"]+/g, '')

fs.writeFile('./_log/L_.txt', list, (err) => {
    if (err) throw err
})

Input

"0  1   ITEM    \r\n    2   2   ITEM    \r\n"

Output

0   1   ITEM    \u0A0   2   2   ITEM    \u0A0

Expected Output

0   1   ITEM
2   2   ITEM

Trial #3 - Default Node fs Encoding

let list = req.body.L_.replace(/['"]+/g, '')

fs.writeFile('./_log/L_.txt', list, (err) => {
    if (err) throw err
})

Input

"0  1   ITEM    \r  2   2   ITEM    \r"

Output

0   1   ITEM    2   2   ITEM

Expected Output

0   1   ITEM
2   2   ITEM

Upvotes: 2

Views: 2475

Answers (1)

MindlessRouse
MindlessRouse

Reputation: 197

Edit based on comments:

This isn't a nodejs issue. It sounds like encoding for notepad is nonexistent. I recall looking at server logs years ago with nodepad and they where all on one line too. I would suggest using a different text file reader such as Sublime or Notepad++

When I run the .replace code you have it works fine for me. Below I have create a test string, from your example. I have escaped some of the characters that javascript would have interpreted. Then called your replace method. Which you can see that the out come was after 

var s = "\"0  101    1  102        XYZ    15141                          144                Test                      \\n\""
var s2 = s.replace(/['"]+/g, '');
// s2 is 0  101    1  102        XYZ    15141                          144                Test                      \n

In your example you aren't calling the replace method. This leads me to believe you are calling it incorrectly. The replace method returns a new string leaving original string unaffected.

I would suggest something like this (storage is cheap)

var num = JSON.stringify(req.body.number).replace(/\"/g, "");
var list = JSON.stringify(req.body.list).replace(/['"]+/g, "");
list = list.replace(/[ ]+/g, "\t"); // Replaces the spaces with a single tab
fs.writeFile('./_log' + num + '.txt', list, (err) => {
  if (err) throw err
})

Upvotes: 1

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