Question 97723 in Nginx Question posted in
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"net::ERR_ABORTED 404" error in a NodeJS app running on Nginx

I have an SPA facing this error and I cannot seem to figure out why I am receiving it.

Bellow, my server.js

// Load Node modules
var express = require('express');
const bodyParser = require('body-parser');
const path = require('path');
const ejs = require('ejs');
var falaUser = require("./routes/falaUser");

//Config files
process.env['NODE_CONFIG_DIR'] = __dirname + '/config/';
console.log("Usando "+process.env['NODE_CONFIG_DIR'] +" como diretório de configurações");
var config = require("config");

// Initialise Express
var app = express();

// Render static files
app.use(express.static('./public/'));
app.use(bodyParser.json());
app.use("/falauser", falaUser);

// Set the view engine to ejs
app.set('view engine', 'ejs');
var server = app.listen(config.get("port"), config.get("hostname"), function () {
    var host = server.address().address;
    var port = server.address().port;
    console.log('Rodando bacana em https://' + host + ':' + port)
});

// Root Route
app.get('/strapiClient', function (req, res) {
    res.render('pages/index');
});

Here, relevant part of nginx.conf

upstream strapiClient {
    server botboutique.com.br:3847;
}

Here, relevant part of nginx/sites-enabled/00-default.ssl.conf

    # strapiClient
    location /strapiClient  {
        root   html;
        index  index.html index.htm index.ejs;
        proxy_read_timeout 120;
        proxy_pass http://strapiClient;

        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header Host $http_host;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

Here, my HTML header partials in my ..views/partials/hearders.conf

<header>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>BOTIKE - Robôsitos que conversam com pessoas e negócios</title>
    <link rel="icon" href="images/cropped-favicon_botike-192x192.png" />
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">
    <link rel="preconnect" href="https://fonts.gstatic.com">
    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Roboto:wght@500;900&display=swap">
    <link rel="preconnect" href="https://fonts.gstatic.com">
    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Roboto+Condensed:wght@400;700;900&display=swap">

    <!-- Bootstrap -->
    <link type="text/css" rel="stylesheet" href="css/bootstrap-4.4.1.css">

    <!-- Animação dos balões da capa -->
    <link type="text/css" rel="stylesheet" href="css/animation-icoHum.css">
    <link type="text/css" rel="stylesheet" href="css/animation-icoBot.css">
    <link type="text/css" rel="stylesheet" href="css/animation-lettering.css">
    <link type="text/css" rel="stylesheet" href="css/style.css">
    <link type="text/css" rel="stylesheet" href="css/stilo.css">
    <link type="text/css" rel="stylesheet" href="slick-1.8.1/slick/slick.css">
    <link type="text/css" rel="stylesheet" href="slick-1.8.1/slick/slick-theme.css">

    <!-- Script principal -->
    <script type="text/javascript" src="js/scripto.js"></script>
</header>

My scripts.ejs in ..views/partials/partials:

<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script type="text/javascript" src="js/jquery-3.4.1.min.js "></script>

<!-- Include all compiled plugins (below), or include individual files as needed -->
<script type="text/javascript" src="js/popper.min.js "></script>
<script type="text/javascript" src="js/bootstrap-4.4.1.js "></script>
<script type="text/javascript" src="slick-1.8.1/slick/slick.min.js"></script>
<script type="text/javascript" src="js/script.js "></script>

That´s my files structure:

enter image description here

The rendered page can acessed at botboutique.com.br/strapiClient

A weird thing: while Edge and Firefox shows in the console the expected URL (botboutique.com.br/strapiClient/some-directory/some-file), Goolge Chrome supress "strapiCLient" from the URL).

A final thing: I’m facing a "Refused to apply style from '<URL>' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled." but I think that I must to correct 404 error first before going into this…

My /etc/nginx/conf-available:

add_header X-Frame-Options sameorigin;
add_header X-Content-Type-Options nosniff;
add_header X-XSS-Protection '1; mode=block';
add_header X-Download-Options noopen;
add_header X-Permitted-Cross-Domain-Policies none;
add_header Content-Security-Policy "default-src https: data: wss: 'unsafe-inline' 'unsafe-eval'";
add_header Referrer-Policy strict-origin;
Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    As @Ivan Shatsky pointed, be sure about browser context: that's prety important to understand how relative links will be served. In my scenario, I put an extra slash at the end of location /strapiClient/ and it makes everything work. So, etc/nginx/sites-enabled/00-default.ssl.conf was the only file that I edit to resolve the context and find the files correctly.

    Unfortunatelly and for some reason that I didn't understand (yet) NodeJS refused to serve the pages using express.static at server.js. And the solution that worked for me is quite verbose and seems like a "brute force" approach:

    app.use('*/images', express.static(path.join(__dirname + '/public/images')));
app.use('*/js', express.static(path.join(__dirname + '/public/js')));
app.use('*/css', express.static(path.join(__dirname + '/public/css')));
app.use('*/slick-1.8.1', express.static(path.join(__dirname + '/public/slick-1.8.1')));

    Despite I'm still struggling with how NodeJS is serving the pages, this question is solved. Thanks again @Ivan.


  2. 0

    When you serve a web app rather than some kind of API endpoint under an URI prefix, generally you should choose

    location /prefix/ {
    ...
}

    rather than

    location /prefix {
    ...
}

    You may think there should no significant difference in those two; however, the difference is more than significant – the opened page will have different browsing context in those two cases. When you open your page using /strapiClient URI, your browsing context is / and when you open your page using /strapiClient/ URI, your browsing context is /strapiClient/. And it is the browsing context that determines how relative links will be processed – would be the script from the <script type="text/javascript" src="js/scripto.js"> tag requested as /js/scripto.js or as /strapiClient/js/scripto.js. I cannot check Edge or Firefox right now; however, using Google Chrome your assets are being requested differently using different prefixes with and without trailing slash.

    Using the location /prefix/ { ... } style has the following advantages:

    • you’d never face the situation when the other route starting with the same prefix, e.g. /prefixed will be handled with the wrong location;

    • all the assets referred using relative links will get correct /prefix/ automatically when being requested;

    • you can easily strip the /prefix from the proxied URI using the autoreplace proxy_pass directive feature when it it’s declaration includes an URI part (the trailing slash here is an URI part):

      location /prefix/ {
    proxy_pass http://upstream/;
}

      This behavior is described in the proxy_pass directive documentation:

      If the proxy_pass directive is specified with a URI, then when a request is passed to the server, the part of a normalized request URI matching the location is replaced by a URI specified in the directive:

      location /name/ {
    proxy_pass http://127.0.0.1/remote/;
}

    • The redirection from /prefix to /prefix/ will be automatically issued by nginx itself in most cases; this behavior is described in the location directive documentation:

      If a location is defined by a prefix string that ends with the slash character, and requests are processed by one of proxy_pass, fastcgi_pass, uwsgi_pass, scgi_pass, memcached_pass, or grpc_pass, then the special processing is performed. In response to a request with URI equal to this string, but without the trailing slash, a permanent redirect with the code 301 will be returned to the requested URI with the slash appended.

    Unfortunately I don’t know for sure how you should change your express.static middleware function. An English documentation page suggests the following approach:

    app.use('/static', express.static(path.join(__dirname, 'public')))

    Russian translation of the aforementioned documentation page suggests a different one:

    app.use('/static', express.static(__dirname + '/public'));

    Or maybe you should define your URI prefix directly:

    app.use('/static', express.static('/strapiClient/public'));

    Nevertheless, I hope this answers some of your questions, at least partially, and gives you some starting point of where to start debugging your app and the express static module behavior.

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