Change path separator using path module

Question

Here is my code:

var thisImageName = thisRow["imagename"];
var thisImagePath = path.relative("./public", __dirname + "/public/uploads/" + thisImageName + ".jpg");
console.log(thisImagePath); // returns __dirname\public\uploads\
img.src = thisImagePath.split(path.sep).join("/");

To get the appropriate image path, I have to split by the path separator and then join the array with the appropriate slash. Does anyone know of a more efficient way of doing this?

justin.m.chase · Accepted Answer · 2016-01-05 21:29:31Z

22

Also, you can always get forward slashes in paths by specifically using the posix path apis:

var p = path.posix.relative("./public", imagePath);

EDIT: This api is only available in versions of node 0.12 or higher.

edited Jan 5, 2016 at 21:29

answered Aug 25, 2015 at 21:51

justin.m.chase

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2 Comments

THEtheChad Over a year ago

I made the same mistake of thinking this would work. As long as each string parameter you pass to relative does not have any path separators, it works. But if you do something like path.posix.relative('./public', 'blah\blah\blah'), the result is ../blah\blah\blah. I took that into account when I made this answer.

justin.m.chase Over a year ago

Yes true, this will let you build platform specific paths but not repair existing path strings.

ErisDS · Accepted Answer · 2013-09-09 15:36:01Z

14

John's answer will only replace the first instance of a '\'

img.src = thisImagePath.replace(new RegExp('\\' + path.sep, 'g'), '/');

Would replace all of them.

You can pass the 'g' flag to .replace but this non-standard.

answered Sep 9, 2013 at 15:36

ErisDS

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Comments

Keegan Teetaert · Accepted Answer · 2022-10-13 13:42:16Z

3

You can also use the replaceAll string method.

img.src = thisImagePath.replaceAll(path.sep, "/");

answered Oct 13, 2022 at 13:42

Keegan Teetaert

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Comments

THEtheChad · Accepted Answer · 2023-07-16 21:26:37Z

I came across this question because I was trying to fix system paths. While the accepted answer works for converting strings to URLs (since they're always '/'), it does not work for file system paths. Below is a more comprehensive answer which I think fits the implied question better.

const ESCAPE = '\\';
const WRONG_SEPARATOR_FILE_SYSTEM = path.sep === path.win32.sep ?
   path.posix.sep :
   path.win32.sep;

const RGX_WRONG_SEPARATOR_FILE_SYSTEM = new RegExp(ESCAPE + WRONG_SEPARATOR_FILE_SYSTEM, 'g');
const RGX_WRONG_SEPARATOR_URL = new RegExp(ESCAPE + path.win32.sep, 'g');

function strToPath(str) {
    return str.replace(RGX_WRONG_SEPARATOR_FILE_SYSTEM, path.sep);
}

function strToUrl(str) {
    return str.replace(RGX_WRONG_SEPARATOR_URL, '/')
}

// using urls
img.src = strToUrl(thisImagePath)

// using files
strToPath('/some/posix/path') // will be correct regardless of system
strToPath('\some\win\path') // will be correct regardless of system

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