On refreshing angularjs page gives error of page not found - angularjs

Question

I have an angular application in which when I used
$locationProvider.html5Mode(true);
for removing #! , it works good. but when I refreshes the page it gives error that
Get GET /c/electronic/computer/laptop not found which is my url
This is my app.js page
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var index = require('./routes/index');
var app = express();
app.use(function(req,res,next){
res.setHeader('Access-Control-Allow-Origin', '*');
res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
res.setHeader('Access-Control-Allow-Credentials', true);
next();
});
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', index);
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
app.use(function(err, req, res, next) {
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
This is my index page I putted all my functions and apis for firing queries where in models there had my mongodb's queries
var express = require('express');
var router = express.Router();
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
Category = require('./models/category');
Product = require('./models/product');
http = require('http');
mongoose.connect('mongodb://localhost/baazaronline');
var db = mongoose.connection;
router.get('/api/category', function(req, res){
Category.getCategory(function(err, category){
if(err){
throw err;
}
res.json(category);
});
});
router.get('/api/product', function(req, res){
Product.getProduct(function(err, product) {
if(err){
throw err
}
res.json(product);
})
});
router.get('/api/product/:_id', function(req, res){
Product.getProductById(req.params._id, function(err, product){
if(err){
throw err;
}
res.json(product);
});
});

Answer 1

Kasun, the reason that this is occurring is because you are trying to refresh the page from one of your sub routes (has nothing to do with ui-router).
Basically if you request www.yourdomain.com/ you likely have your server setup to return index.html which bootstraps your angular app. Once the app has loaded, any further url changes take html5Mode into consideration and update your page via ui-router.
When you reload your page the angular app is no longer valid as it has not loaded yet, so if you are trying to load a sub route (for example: www.yourdomain.com/someotherpage), then your server does not know how to deal with /someotherpage and likely returns 404 or some other error.
What you need to do is configure your server to return your angular app for all routes. I primarily use node/express, so I do something like:
app.get('*', function(req, res, next) {
// call all routes and return the index.html file here
}
Note: I usually use something like this as a final catch all, however I also include other routes above it for things like requesting static files, web crawlers, and any other specific routes that need to be handled.