No styles are added when rendering the page - node.js

I have a problem with styles when rendering a page.
There are no problems connecting styles on any other page
This is pug with product.pug:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="styles/main.css">
<title>#{product.product_name}</title>
</head>
<body>
<header>
include layout/menu.pug
include layout/myProfile.pug
</header>
<main>
| there will be data about the product
</main>
include layout/footer.pug
</body>
</html>
This is code with app.js:
app.get('/product/:productId', (req, res) => {
if (req.params["productId"] !== undefined &&
req.params["productId"] > 0) {
conn.query(`SELECT *
FROM product
WHERE product_id = ${req.params["productId"]}`, (err, product) => {
if(err) {throw err;}
if(product.length > 0) {
res.render('product', {
userName: req.session.userName,
successAuthentication: req.session.successAuthentication,
isWorker: req.session.isWorker,
product
})
} else {
res.sendStatus(404);
}
});
} else {
res.sendStatus(404);
}
});
Styles are stored in the public folder, and app is used to use styles
app.use(express.static (path.join(__dirname, 'public')));
Any other page doesn't have a problem with styles.
I can't solve this problem, so I will be grateful for any hint


You can set your express static folder like this code below:
app.use(expresss.static('public'));
Now, you can try to create your public folder in your app root and move your styles folder into your public folder and its Will working fine.
I hope it can help you.

Related

How to escape '-' hyphen symbol from xml in MathJax

<!DOCTYPE html>
<html>
<head>
<title>MathJax MathML Test Page</title>
<script type="text/javascript" id="MathJax-script" async
src="https://cdn.jsdelivr.net/npm/mathjax#3/es5/mml-chtml.js">
</script>
</head>
<body>
<p>
<math overflow="scroll"><mfrac><msup><msub><mi mathvariant="-italic">Q</mi><mrow><msub><mi mathvariant="italic">T</mi><mi mathvariant="italic">i</mi></msub><mo mathvariant="italic">max</mo></mrow></msub><mn mathvariant="normal">0.75</mn></msup><msup><mi mathvariant="italic">β</mi><mn mathvariant="normal">0.75</mn></msup></mfrac><mo>≤</mo><mn mathvariant="normal">5</mn><mo>×</mo><msub><mi mathvariant="italic">AEL</mi><msub><mi mathvariant="italic">T</mi><mi mathvariant="italic">i</mi></msub></msub><mo>×</mo><msup><msub><mi mathvariant="italic">Q</mi><msub><mi mathvariant="italic">T</mi><mi mathvariant="italic">m</mi></msub></msub><mrow><mo>−</mo><mn mathvariant="normal">0.25</mn></mrow></msup><mo></mo></math>
</p>
</body>
</html>
Getting parsing error with new CDN https://cdn.jsdelivr.net/npm/mathjax#3/es5/mml-chtml.js

Here is a configuration you can use to post-filter the MathML to fix the invalid -italic math variant value.
MathJax = {
startup: {
ready() {
MathJax.startup.defaultReady();
MathJax.startup.input[0].postFilters.add(({data}) => {
data.walkTree(node => {
if (node.attributes) {
if (node.attributes.get('mathvariant') === '-italic') {
node.attributes.set('mathvariant', 'italic');
}
}
});
});
}
}
}
Place this in a <script> tag just before the script that loads mml-html.js.

Question about incrementing data value, from a specific collection in mongodb with nodejs

So I followed a tutorial which has taught me some things about nodejs and mongodb. I now know how to insert new data from the server in to my database.
But what I can't seem to figure out is how to update existing data in a collection. I have searched on a lot of places but sadly no clear answer for me. I am a little of a noob still with this so excuse me if i say things that are probably wrong.
So this is what I've tried to set up:
Code from my Controller.js:
app.get("/button", function(req, res) {
mongo.connect(url_monitor, function (err, db) {
assert.equal(null, err);
db.numbers.update({ $inc: { number: -2}})
getData(res);
})
})
}
I am using the MVC model that has the: controller, model and view. So all pages in the view folder are .ejs files. I am also using jQuery and ajax to send a request to the controller.
button.js:
$(document).ready(function(){
$('#btn1').on('click', function(){
var number = {number: 0}
$.ajax({
type: 'GET',
url: '/button',
data: number,
success: function(number){
//do something with the data via front-end framework
location.reload();
alert('It works')
}
});
});
})
button.ejs:
<!DOCTYPE html>
<html lang="en">
<head>
<script
src="https://code.jquery.com/jquery-3.5.1.min.js"
integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0="
crossorigin="anonymous"></script>
<script src="/assets/button.js"></script>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Todo List</title>
<link href="/assets/styles.css" rel="stylesheet" type="text/css">
</head>
<body>
<h1>Button test</h1>
<button id="btn1">Increase number</button>
</body>
</html>
So basically what I am trying to achieve is that once I press a button somewhere on a page, it would increase/decrease a value in the database in one of the specific collections. I am kinda lost with this, any help would be appreciated.

After searching for a very long time, i finally found the solution. If anyone else is having this issue then refer to this link: https://docs.mongodb.com/drivers/node/usage-examples/updateOne

Bokeh is not generating plot and is instead returning an HTML file

I am new to Python and was trying out the Bokeh library. I try to plot a basic line graph and instead of returning the graph I get an ouput HTML file. When I ran the HTML code it looks like the graph does generate. Does anyone have any idea why the show() method is not showing me the chart as expected. I tried this in both Jupyter Notebook as well as Atom and both return the HTML code. I am running Windows 7 as well.
My code:
from bokeh.plotting import figure
from bokeh.io import output_file , show
x=[1,2,3,4,5]
y=[6,7,8,9,10]
output_file("test1.html")
f=figure()
f.line(x,y)
show(f)
Returned HTML file:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Bokeh Plot</title>
<link rel="stylesheet" href="https://cdn.bokeh.org/bokeh/release/bokeh-0.13.0.min.css" type="text/css" />
<script type="text/javascript" src="https://cdn.bokeh.org/bokeh/release/bokeh-0.13.0.min.js"></script>
<script type="text/javascript">
Bokeh.set_log_level("info");
</script>
</head>
<body>
<div class="bk-root" id="d48bbd43-55c8-4727-befa-468754bdb0b5"></div>
<script type="application/json" id="41bd10a1-5a61-4504-80f1-8c56f40e644b">
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</script>
<script type="text/javascript">
(function() {
var fn = function() {
Bokeh.safely(function() {
(function(root) {
function embed_document(root) {
var docs_json = document.getElementById('41bd10a1-5a61-4504-80f1-8c56f40e644b').textContent;
var render_items = [{"docid":"c99a857f-320f-48ba-8576-3ef2bd47c6ce","roots":{"4da3e749-cdb4-48ed-8dc6-b78818d8f587":"d48bbd43-55c8-4727-befa-468754bdb0b5"}}];
root.Bokeh.embed.embed_items(docs_json, render_items);
}
if (root.Bokeh !== undefined) {
embed_document(root);
} else {
var attempts = 0;
var timer = setInterval(function(root) {
if (root.Bokeh !== undefined) {
embed_document(root);
clearInterval(timer);
}
attempts++;
if (attempts > 100) {
console.log("Bokeh: ERROR: Unable to run BokehJS code because BokehJS library is missing")
clearInterval(timer);
}
}, 10, root)
}
})(window);
});
};
if (document.readyState != "loading") fn();
else document.addEventListener("DOMContentLoaded", fn);
})();
</script>
</body>
</html>

Yes that will happen but is easy to resolve :
right click the (output html file) in working folder ---> hover over open with----> choose default program---> click on always open with (google chrome)
Now the next time you run your code plot will open up in chrome instead of .html file in notepad

Loading a js file not in the public folder in a Twig template

My file structure looks like this:
---public(Documentroot folder, where all my css,js, images loads from)
---models
---modules {all my modules customer, db_management e.t.c)
---scripts
|---ivr_builder
|------ui-bootstrap-tpls-0.2.js
--twig_templates {All my ta}
|---layout.twig
In my index.php file, I have this:
use \Psr\Http\Message\ServerRequestInterface as Request;
use \Psr\Http\Message\ResponseInterface as Response;
require '../vendor/autoload.php';
spl_autoload_register(function ($classname) {
require "../models/" . $classname . ".php";
});
$config['displayErrorDetails'] = false;
$app = new \Slim\App(["settings" => $config]);
$container = $app->getContainer();
// Register component on container
$container['view'] = function ($container) {
$view = new \Slim\Views\Twig(
'/var/www/html/ivr/twig_templates', ['cache' => false]);
$env = $view->getEnvironment();
$lexer = new Twig_Lexer($env, array(
'tag_comment' => array('{#', '#}'),
'tag_block' => array('{%', '%}'),
'tag_variable' => array('[[', ']]'),
'interpolation' => array('#{', '}'),
));
$env->setLexer($lexer);
$loader = new \ Twig_Loader_Filesystem('ivr/scripts/ivr_builder/ui-bootstrap-tpls-0.13.4.js');
$env->getLoader();
return $view;
};
Then in my browser, I get this error:
Name | Status
---------------------------- | ------
angular-aside.js | 200
jquery.js | 200
ui-bootstrap-tpls-0.1.3.4.js | 500
My layout.swig header looks like this:
<meta http-equiv="Content-Type" content="text/html" charset="iso-8859-1">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
{% if page_title is defined and page_title is not null ? page_title: 'Log in' %}
{% endif %}
<link rel='stylesheet' href='/css/bootstrap.css'/>
<link rel='stylesheet' href='/js/libraries/angular-aside/angular-aside.css'/>
<link rel="stylesheet" href="/js/libraries/angular-notify-master/styles/css/angular-notify-texture.css" id="notifyTheme">
<link rel='stylesheet' href='/css/ivr_builder.css'/>
<link rel="stylesheet" type="text/css" href="/css/custom.css">
<script type="application/javascript" src="/js/libraries/angular.js"></script>
<script type="application/javascript" src="/js/libraries/angular-animate.min.js"></script>
<script type="application/javascript" src="/scripts/ivr_builder/ui-bootstrap-tpls-0.13.4.js"></script>
<script type="application/javascript" src="/js/libraries/angular-aside/angular-aside.js"></script>
<script type="application/javascript" src="/js/libraries/angular-notify-master/scripts/dist/angular-notify.js"></script>
<script type="application/javascript" src="/js/jquery-ui-1.11.4/external/jquery/jquery.js"></script>
[[top_bar]]
Please any suggestion on how why its not loading please on the browser.

I can easily use xsendfile to load it:
Sending files
Sending a file with xsendfile is very straightforward:
<?php
//We want to force a download box with the filename hello.txt
header('Content-Disposition: attachment;filename=hello.txt');
//File is located at /home/username/hello.txt
header('X-Sendfile: /home/username/hello.txt');
You could omit the first header, in which case the browser would not necessarily show a download file dialog. Also, the X-Sendfile header will not show up in the user’s browser, and they will never see the real location of the file they received.
You will not need to send a Content-Length header, as Apache will take care of that for you. Also found this on Slim:
XSendFile On
XSendFilePath "/path/to/directory/containing/js/files"
And in your Slim application route callback, set the X-SendFile header with the absolute path to a file within the file path specified above:
$app->get('/get-file', function () use ($app) {
$res = $app->response();
$res['X-SendFile'] = '/path/to/directory/containing/js/files/foo.js';
});

Node.js and swig template engine - including template inside template

I trying to create main page (part of node.js and mongoDB application) that includes login form.
To add view part I included js files with function that returns HTML, but as I can see much better is using template engine.
Everything is OK until I including one compiled swig part inside another one.
The output of main page is OK, but login part outputs like text on the page.
How is possible to output the login HTML as HTML instead of plain text?
Does more information needed to understand the issue?
Thank you in advance.
var swig = require('swig');
var mainPage_tpl = swig.compileFile(__dirname+'/../views/mainpage_tpl.html');
var formLogin_tpl = swig.compileFile(__dirname+'/../views/login_tpl.html');
var loginOutput = formLogin_tpl();
var mainPageOutput = mainPage_tpl({
title: 'Sometitle',
pagetitle: 'Somepagetitle',
content: loginOutput
});
exports.get = function(req, res){
res.writeHead(200, {'Content-Type': 'text/html'});
res.write(mainPageOutput);
res.end();
}
mainpage_tpl.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>{{title}}</title>
<link rel="stylesheet" href="/assets/reset.css" />
<link rel="stylesheet" href="/assets/style.css" />
<script type="text/javascript" src="/assets/jquery-2.0.0.js"></script>
<script type="text/javascript" src="/assets/script.js"></script>
</head>
<body id="login_page">
<h1>{{pagetitle}}</h1>
<div id="content">{{content}}</div>
</body>
</html>

If you want to include literal HTML, you need to tell Swig to not escape it using the safe filter:
...
<div id="content">{{ content|safe }}</div>
...

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