Question
How can I serve different HTML (entry) files for an SPA application (Vue) in ASP.NET Core?
Explanation
Depending on a condition, I would like to serve a different HTML page (much like a controller would do for a non-SPA). The page would still include the entry point for Vue apps <div id="app">, but some other changes should be done before serving the HTML.
I know I somehow have to change the startup.cs file because that renders the HTML with app.UseStaticFiles() and app.UseSPAStaticFiles()
Example
Condition 1 is fulfilled, base.html is served from client -> public -> base.html
Condition 2 is fulfilled instead, special.html is served from client -> public -> special.html
Code
The basic HTML looks something like this:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<link rel="icon" href="<%= BASE_URL %>favicon.ico">
<title>Title</title>
</head>
<body>
<noscript>
<strong>We're sorry but this webpage doesn't work properly without JavaScript enabled. Please enable it to
continue.</strong>
</noscript>
<div id="app"></div>
<!-- built files will be auto injected -->
</body>
</html>
The important parts of startup.cs looks like this:
services.AddSpaStaticFiles(configuration =>
{
configuration.RootPath = "ClientApp/dist";
});
// ....
app.UseStaticFiles();
app.UseSpaStaticFiles();
// ....
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller}/{action=Index}/{id?}");
if (env.IsDevelopment())
{
endpoints.MapToVueCliProxy(
"{*path}",
new SpaOptions { SourcePath = "ClientApp" },
npmScript: "serve",
regex: "Compiled successfully");
}
// Add MapRazorPages if the app uses Razor Pages. Since Endpoint Routing includes support for many frameworks, adding Razor Pages is now opt -in.
endpoints.MapRazorPages();
});
// ....
app.UseSpa(spa =>
{
spa.Options.SourcePath = "ClientApp";
});
Related
I have an ASP.NET Core 6 app and I host my Angular app with it, among other things (from Program.cs):
...
app.Use(async (context, next) =>
{
RewriteXFrameOptionsHeader(context);
await next();
if (context.Response.StatusCode == 404 && !Path.HasExtension(context.Request.Path.Value))
{
context.Request.Path = "/";
await next();
}
});
app.UseDefaultFiles(new DefaultFilesOptions {DefaultFileNames = new List<string> {"index.html"}});
app.UseStaticFiles();
...
It it doesn't work, because scripts are not loaded. The Angular index.html uses base href and relative paths to js sources, like so:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<base href="/ngxapp">
...
<script src="runtime.7cef1b4acdcbe752.js" type="module"></script><script src="polyfills.e4b5afbd657fbe4a.js" type="module"></script><script src="main.c8a9bcf210ef6760.js" type="module"></script>
</body>
</html>
Even though script src's contain relative paths, the browser tries to load script from the root. Here's what dev tools Network tab shows:
Request URL: https://localhost:7101/runtime.7cef1b4acdcbe752.js
MDN docs for base href state:
The HTML element specifies the base URL to use for all relative URLs in a document.
Why then scripts are being loaded from root?
I have a firebase hosted Flutter Web application which is a game. Since the URL for the Firebase hosted site (https://jw-daily.web.app) is difficult to remember for users, I bought a domain name (joinedwords.com) and redirected the URL to the firebase hosted site.
Problem is that when I type the domain URL i.e. joinedwords.com, the website renders in only half the height like below:
However, if I type the original URL (https://jw-daily.web.app) in the browser, the webpage renders in full like below:
All that I have done is with my domain provider, I have set a forward with masking of joinedwords.com => https://jw-daily.web.app/
I looked up all the other solutions around why a webpage is rendering in half. However most of them are asking to make changes to the code and I don't want to do that since the original URL is working fine. Incidentally this issue is happening only on mobile browsers and not happening on desktop. In desktop, the website renders correctly regardless of which URL is typed.
Please suggest if you are aware of how we can solve this problem. Here is my index.html file.
<!DOCTYPE html>
<html prefix="og: http://ogp.me/ns#">
<head>
<!--
If you are serving your web app in a path other than the root, change the
href value below to reflect the base path you are serving from.
The path provided below has to start and end with a slash "/" in order for
it to work correctly.
For more details:
* https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
-->
<base href="/">
<meta charset="UTF-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="description" content="A Daily Word Game">
<meta image="" />
<meta property="og:image:url" content="https://s3.us-east-2.amazonaws.com/joint.words/joined-xxx.png"
property="og:image:secure_url" content="https://s3.us-east-2.amazonaws.com/joint.words/joined-xxx.png"
property ="og:image:alt" content="Joined Words Logo"
property="og:image:type" content="image/png"
/>
<!--
property="og:image:width" content="100"
property="og:image:height" content="100"
-->
<!-- iOS meta tags & icons -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="Joined Words">
<link rel="apple-touch-icon" href="https://s3.us-east-2.amazonaws.com/joint.words/joined-256.png">
<!-- Favicon -->
<link rel="shortcut icon" href="favicon.png" type="image/x-icon">
<link rel="icon" href="favicon.png" type="image/x-icon">
<title>Joined Words</title>
<link rel="manifest" href="manifest.json">
<meta name="google-site-verification" content="XXXXXXXXX-XXXXXX" />
/>
<!-- Global site tag (gtag.js) - Google Ads: xxxxxxxxx -->
<script async src="https://www.googletagmanager.com/gtag/js?id=AW-xxxxxxxxxxx"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'AW-xxxxxxxxxxx');
</script>
<!-- Event snippet for Website traffic conversion page -->
<script>
gtag('event', 'conversion', {'send_to': 'xxxxxxxxxxxxxxxxxxx'});
</script>
</head>
<body>
<!-- This script installs service_worker.js to provide PWA functionality to
application. For more information, see:
https://developers.google.com/web/fundamentals/primers/service-workers -->
<script>
var serviceWorkerVersion = null;
var scriptLoaded = false;
function loadMainDartJs() {
if (scriptLoaded) {
return;
}
scriptLoaded = true;
var scriptTag = document.createElement('script');
scriptTag.src = 'main.dart.js?version=1';
scriptTag.type = 'application/javascript';
document.body.append(scriptTag);
}
if ('serviceWorker' in navigator) {
// Service workers are supported. Use them.
window.addEventListener('load', function () {
// Wait for registration to finish before dropping the <script> tag.
// Otherwise, the browser will load the script multiple times,
// potentially different versions.
var serviceWorkerUrl = 'flutter_service_worker.js?v=' + serviceWorkerVersion;
navigator.serviceWorker.register(serviceWorkerUrl)
.then((reg) => {
function waitForActivation(serviceWorker) {
serviceWorker.addEventListener('statechange', () => {
if (serviceWorker.state == 'activated') {
console.log('Installed new service worker.');
loadMainDartJs();
}
});
}
if (!reg.active && (reg.installing || reg.waiting)) {
// No active web worker and we have installed or are installing
// one for the first time. Simply wait for it to activate.
waitForActivation(reg.installing ?? reg.waiting);
} else if (!reg.active.scriptURL.endsWith(serviceWorkerVersion)) {
// When the app updates the serviceWorkerVersion changes, so we
// need to ask the service worker to update.
console.log('New service worker available.');
reg.update();
waitForActivation(reg.installing);
} else {
// Existing service worker is still good.
console.log('Loading app from service worker.');
loadMainDartJs();
}
});
// If service worker doesn't succeed in a reasonable amount of time,
// fallback to plaint <script> tag.
setTimeout(() => {
if (!scriptLoaded) {
console.warn(
'Failed to load app from service worker. Falling back to plain <script> tag.',
);
loadMainDartJs();
}
}, 4000);
});
} else {
// Service workers not supported. Just drop the <script> tag.
loadMainDartJs();
}
</script>
<!-- Initialize Firebase -->
<script src="/__/firebase/9.0.2/firebase-app.js"></script>
<script src="/__/firebase/9.0.2/firebase-analytics.js"></script>
<script src="/__/firebase/init.js"></script>
<!-- Initialize app -->
<script src="main.dart.js?version=15 " type="application/javascript"></script>
</body>
</html>
Found an answer to the issue I was facing. Here is the link to the same:
Bootstrap Responsive Design Fails with Web Forwarding
This is because you are using a framed redirect which essentially loads up the target website in an iFrame. Doing so loses any responsive capabilities. What you are best doing is changing your web forwarding method to actually forward to the new URL using a non-framed redirect. This will then properly load up the target URL in the users browser and all the responsive capabilities that go with it.
I'm trying to get the HTML DOM from the following website: https://www.inputbcn.com/en/tickets#/events
The 'default' DOM of this website its the following:
<!doctype html>
<html lang="">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
</head>
<body>
<div id="xceed-widget"></div>
<script src="https://s3-eu-west-1.amazonaws.com/xceed-widget/2019-version/dist/loader.js" type="text/javascript"></script>
</body>
</html>
As you can see, when the page loads, a JavaScript script is called which will fill the page DOM.
I want to get the full page DOM after the script is executed and I'm using PhantomJS for this purpose. I began with the following code:
var page = require('webpage').create();
page.open("https://www.inputbcn.com/en/tickets#/events", function(status) {
console.log("Status: " + status);
if (status === "success") {
console.log(page.content);
}
});
But after executing this piece of code, I can see the response status fails.
How can I get the full document of this specific website?
NOTE: this answers did not help my purpose.
I'm trying to proxy to a certain API endpoint that returns an html page but I get the error
Access to font at 'https://data.domain.com/v3/assets/fonts/glyphicons-halflings-regular.woff2' from origin 'http://localhost:4200' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
GET https://data.domain.com/v3/assets/fonts/glyphicons-halflings-regular.woff2 net::ERR_FAILED
Inside my angular app, I have three different targets that I am proxying to. The first two proxies work fine but the other is a bit weird.
My proxy.conf.json file looks sth like this...
{
"/API": {}, // First proxy works fine
"/info": {}, // Second proxy fine too
"/data": {
"target": "https://data.domain.com/v3/uk",
"secure": false,
"pathRewrite": {
"^/data": ""
},
"changeOrigin": true,
"logLevel": "debug"
}
}
So inside my data service, I define a variable data that contains the path '/data' and I pass that as the path in my POST request like so...
private data = '/data';
public fetchData(data: Data) {
return this.http.post(this.data, data, {responseType: 'text');
}
Upon making that post request, I'm expecting the returned value to be some html code that I'd like to bind to my template. Herein lies the problem. You see, the returned HTML looks something like this...
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>My Page</title>
<!-- Bootstrap -->
<link href='https://fonts.googleapis.com/css?family=Ubuntu:300' rel='stylesheet' type='text/css'>
<link href="https://data.domain.com/v3/assets/css/bootstrap.min.css" rel="stylesheet">
<link href="https://data.domain.com/v3/assets/css/loading-bar.min.css" rel="stylesheet">
<link href="https://data.domain/v3/assets/css/custom.css" rel="stylesheet">
</head>
<body
<p class="title">Page Title</p>
</body>
</html>
See that bootstrap import? I think that's what's causing the problem because inside the bootstrap.min.css code, references to the glyphicons-halflings-regular font are made like so...
url(../fonts/glyphicons-halflings-regular.woff2) format('woff2'),url(../fonts/glyphicons-halflings-regular.woff) format('woff'),url(../fonts/glyphicons-halflings-regular.ttf) format('truetype')
Hence for each of those font formats, I get the exact same error repeated.
How can I solve this?
To override the chrome web store new tab page I use the following code:
"chrome_url_overrides": {
"newtab": "index.html"
}
I have a backend which serves the html files so instead of using the index.html file I would like to get a html file via a http request.
Is this possible? Or is there a workaround Thanks.
You could make an ajax call from your index page to remote server, and replace the entire html with external html. Sample code looks like the following
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script src="index.js"></script>
</body>
</html>
index.js
var SERVER_URL = "";
var xhr = new XMLHttpRequest();
xhr.onload = function() {
replaceHtml(xhr.responseText);
};
xhr.open("GET", SERVER_URL);
xhr.send();
function replaceHtml(data) {
document.open("text/html");
document.write(data);
document.close();
}
You could simply have some javascript inside a <script></script> tag in your index.html file that grabs your generated html content from a custom domain.