Node.js, can't open files. Error: ENOENT, stat './path/to/file'

Problem

I have developed a node.js program using the express framework on my computer, where it runs fine with no complaints.

However, when I run the program on my SUSE Studio appliance, where it is intended to live, I receive an error at any file interaction.

Error: ENOENT, stat './path/to/file'

I have checked that the file permissions are correct, which they are. My computer and my appliance are running different versions of node, if this matters.

Any thoughts?

Problem courtesy of: CalumMc

Solution

Paths specified with a . are relative to the current working directory, not relative to the script file. So the file might be found if you run node app.js but not if you run node folder/app.js. The only exception to this is require('./file') and that is only possible because require exists per-module and thus knows what module it is being called from.

To make a path relative to the script, you must use the __dirname variable.

var path = require('path');

path.join(__dirname, 'path/to/file')

or potentially

path.join(__dirname, 'path', 'to', 'file')
Solution courtesy of: loganfsmyth

Discussion

Here the code to use your app.js

input specifies file name

res.download(__dirname+'/'+input);
Discussion courtesy of: AmirtharajCVijay

This recipe can be found in it's original form on Stack Over Flow.