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Express static files not working properly

I'm doing a simple node project to practice but i can't manage to serve html file with its css styles.
I believe that it worked fine for me before with the same code but now I don't understand why it doesn't run.
I searched about it and copied some code replacing the directory's name but it doesn't change anything.
Here is my code.
I also tried with path module to join the file name and the directory name.
app.use(express.static('public'));
app.get('/', (req, res)=>{
res.send("Welcome to our website");
});
app.get("/signup", (req, res)=>{
res.sendFile(__dirname + "/index.html");
});
//My directory:
testapp1
--node_modules
--public
--styles.css
--index.html
--app.js
--package.json
--package-lock.json
In the network tab of the developer console, it says that:
status: canceled
type: stylesheet
initiator: index.html
Size: 0B
time: 29ms
waterfall: "nothing"

app.use(express.static(path.join(__dirname, 'public')));
app.get('/', function (req, res, next) {
res.sendFile(path.join(__dirname, 'public', 'index.html'));
});
Try that instead.

Scotch-io/node-todo app

How is the index.html (frontend Angular) getting called exactly?
In the tutorial, it was said that by having one of the following routes in route.js, frontend is getting called
app.get('*', function(req, res) {
res.sendfile('./public/index.html');
});
----------or-------------------
app.get('*', function(req, res) {
res.sendfile('__dirname + '/public/index.html');
});
But even after removing that route, index.html is getting opened (or) If I rename index.html as index1.html at route and html file it is showing error.

Have you created a file index1.html in public folder? If yes, Use
res.sendfile('public/index1.html');
OR
var path = require('path');
res.sendFile(path.join(__dirname, '../public', 'index1.html'));
to render index1.html.
Note : sendfile is deprecated.

ExpressJS cannot get /route in Openshift, but locally it is working

My project have this following structure.
server.js
/node_modules
/build
vendor.js
main.js
index.html
I'm using express, and AngularJS's ui-router.
In server.js I have this code:
app.get('/*', function(req, res) {
res.sendFile(__dirname + '/build/index.html');
});
And locally it is working if I pass localhost:8080/hellothere, I get the correct page but when I've deployed, it doesn't.
Within the application if use the links to navigate the routes run, the URL is modified to /hellothere, but if I update the page or try to go straight to the absolute URL I get:
Cannot GET /hellothere
I'm already have tryied put:
app.get('/page1', function(req, res) {
res.sendFile(__dirname + '/build/index.html');
});
app.get('/page2', function(req, res) {
res.sendFile(__dirname + '/build/index.html');
});
...
And the behavior is the same of '/*'. Fine local, broke on cloud.
Any idea what's happening here?
homolog Website link

And locally it is working if I pass localhost:8080/hellothere, I get
the correct page but when I've deployed, it doesn't.
The possible reason might be after deploying your base url might be domainname.com/appname and your local code is for localhost:portNumber not for localhost:portNumber/appname
So modify your path to
app.get('/appname/hellothere', function(req, res) {
res.send("hellothere is working");
});
instead of
app.get('/hellothere', function(req, res) {
res.send("hellothere is working");
});
To run it locally, now you will need localhost:portNumber/appname/hellothere

Express routing issue

I am learning expressjs and I've been stuck at moment how to make the navigation between pages:
What I've done:
1. Installed express, and converted regular html to jade format.
2. In app.js I've added following code:
app.get('/', function(req, res){
res.render('views/index.jade', { title: 'index' });
});
app.get('/about', function(req, res){
res.render('views/portfolio.jade', { title: 'about' });
});
All files I've stored in views folder and in index.jade I've added following code:
a.selected(href='/views/index.jade') TIMELINE
a(href='/views/portfolio.jade') PORTFOLIO
a(href='/views/about_me.jade') ABOUT ME
a(href='/views/store.jade') STORE
When I click on portfolio button, the following error appears:

You need to link href the route path:
a.selected(href='/') TIMELINE
a(href='/about') PORTFOLIO
a(href='/about') ABOUT ME
a(href='/store') STORE

You are actually creating routes, which enable a browser to ask the server for data on a specific path. What the server sends to the browser based on that path is up to the programmer.
In your case, you're internally configuring the /about route to render the file views/portfolio.jade.
Thus, instead of linking to the .jade files like you're doing, you should be linking to the actual routes you created:
a.selected(href='/') TIMELINE
a(href='/portfolio') PORTFOLIO
a(href='/about') ABOUT ME
a(href='/store') STORE
Assuming you have the following routes:
app.get('/', function(req, res){
res.render('views/index.jade', { title: 'index' });
});
app.get('/about', function(req, res){
res.render('views/about_me.jade', { title: 'about' });
});
app.get('/store', function(req, res){
res.render('views/store.jade', { title: 'store' });
});
app.get('/portfolio', function(req, res){
res.render('views/portfolio.jade', { title: 'portfolio' });
});

Error: ENOENT, stat '/app/public/views/index.html' in Heroku

I'm having an error serving static views on a Heroku app. Strangely, Heroku seems to append "app" to the front of my static file paths, and I'm not sure why. The path should be "public/views/index.html."
I recently tried this proposed solution from Stack, but it didn't seem to work: Node.js, can't open files. Error: ENOENT, stat './path/to/file'
The get requests from my server:
app.use(express.static(__dirname + '/public'));
app.get('/', function (req, res) {
res.sendFile(__dirname + '/public/views/index.html');
});
// profile page
app.get('/profile', function (req, res) {
// check for current (logged-in) user
req.currentUser(function (err, user) {
// show profile if logged-in user
if (user) {
res.sendFile(__dirname + '/public/views/profile.html');
// redirect if no user logged in
} else {
res.redirect('/');
}
});
});
Does anyone have any idea why Heroku would append "app" to my paths?
All the paths work correctly on a local server. Thanks!

The accepted. solution here of using PWD instead of __dirname is quite wrong. sendFile works on Heroku the same way it works anywhere else:
res.sendFile(path.join(__dirname, 'public', 'views', 'index.html'));

This is because the global __dirname variable inside Heroku is set to /app. Use process.env.PWD instead of __dirname.

Looks like this hasn't had an update in a while, but I ran into the same Heroku root directory confusion, but when I changed my code to use 'path' instead of __dirname, it worked.
path.join(__dirname, '..', 'views', 'email', `${template}.pug`),