Getting 'Not Found' page in polymer app - node.js

I'm very new to Polymer. i read this official polymer documentation and downloaded a code sample and ran it using polyserve without modifying the code.I followed instructions given in polymer-project website. I installed every required components but after running polyserve command, it shows a page with 'Not found' text. Please help me.
I've installed npm 3.3.6,node v5.0.0.,gulp 3.9.0 and bower 1.7.7. All the commands are running fine without any error. I can't understand what exactly is going wrong.Am i missing something?
Polyserve output

Start server and try: http://localhost:8080/components/icon-toggle/demo/
Your folder structure should look like this:
[folder-path]/polymer-first-elements
README.md
bower.json
bower_components
demo -> contents: icon-toggle-demo.html & index.html
icon-toggle-finished
icon-toggle.html

Make sure the default port used by polyserve (3000) is not busy,you can use polyserve -p 8000 to try other port

You don't say what URL you are trying to access in the browser, but the sample code doesn't have any index.html file at its root, so accessing it there will fail.
There is an index.html in the demo directory, so you might have to add that to the url to access it.

I found I needed to add the following line to the <head> element of /demo/index.html:
<link rel="import" href="/bower_components/polymer/polymer.html">
Then view http://localhost:8080/demo (note the trailing "demo").

Related

ReactJS app works fine running with "npm start" but when i build the the app using "npm run build" it doesn't link with backend [duplicate]

I'm trying to load a 3D model, stored locally on my computer, into Three.js with JSONLoader, and that 3D model is in the same directory as the entire website.
I'm getting the "Cross origin requests are only supported for HTTP." error, but I don't know what's causing it nor how to fix it.
My crystal ball says that you are loading the model using either file:// or C:/, which stays true to the error message as they are not http://
So you can either install a webserver in your local PC or upload the model somewhere else and use jsonp and change the url to http://example.com/path/to/model
Origin is defined in RFC-6454 as
...they have the same
scheme, host, and port. (See Section 4 for full details.)
So even though your file originates from the same host (localhost), but as long as the scheme is different (http / file), they are treated as different origin.
Just to be explicit - Yes, the error is saying you cannot point your browser directly at file://some/path/some.html
Here are some options to quickly spin up a local web server to let your browser render local files
Python 2
If you have Python installed...
Change directory into the folder where your file some.html or file(s) exist using the command cd /path/to/your/folder
Start up a Python web server using the command python -m SimpleHTTPServer
This will start a web server to host your entire directory listing at http://localhost:8000
You can use a custom port python -m SimpleHTTPServer 9000 giving you link: http://localhost:9000
This approach is built in to any Python installation.
Python 3
Do the same steps, but use the following command instead python3 -m http.server
VSCode
If you are using Visual Studio Code you can install the Live Server extension which provides a local web server enviroment.
Node.js
Alternatively, if you demand a more responsive setup and already use nodejs...
Install http-server by typing npm install -g http-server
Change into your working directory, where yoursome.html lives
Start your http server by issuing http-server -c-1
This spins up a Node.js httpd which serves the files in your directory as static files accessible from http://localhost:8080
Ruby
If your preferred language is Ruby ... the Ruby Gods say this works as well:
ruby -run -e httpd . -p 8080
PHP
Of course PHP also has its solution.
php -S localhost:8000
In Chrome you can use this flag:
--allow-file-access-from-files
Read more here.
Ran in to this today.
I wrote some code that looked like this:
app.controller('ctrlr', function($scope, $http){
$http.get('localhost:3000').success(function(data) {
$scope.stuff = data;
});
});
...but it should've looked like this:
app.controller('ctrlr', function($scope, $http){
$http.get('http://localhost:3000').success(function(data) {
$scope.stuff = data;
});
});
The only difference was the lack of http:// in the second snippet of code.
Just wanted to put that out there in case there are others with a similar issue.
Just change the url to http://localhost instead of localhost. If you open the html file from local, you should create a local server to serve that html file, the simplest way is using Web Server for Chrome. That will fix the issue.
I'm going to list 3 different approaches to solve this issue:
Using a very lightweight npm package: Install live-server using npm install -g live-server. Then, go to that directory open the terminal and type live-server and hit enter, page will be served at localhost:8080. BONUS: It also supports hot reloading by default.
Using a lightweight Google Chrome app developed by Google: Install the app, then go to the apps tab in Chrome and open the app. In the app point it to the right folder. Your page will be served!
Modifying Chrome shortcut in windows: Create a Chrome browser's shortcut. Right-click on the icon and open properties. In properties, edit target to "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --disable-web-security --user-data-dir="C:/ChromeDevSession" and save. Then using Chrome open the page using ctrl+o. NOTE: Do NOT use this shortcut for regular browsing.
Note: Use http:// like http://localhost:8080 in case you face error.
Use http:// or https:// to create url
error: localhost:8080
solution: http://localhost:8080
In an Android app — for example, to allow JavaScript to have access to assets via file:///android_asset/ — use setAllowFileAccessFromFileURLs(true) on the WebSettings that you get from calling getSettings() on the WebView.
fastest way for me was:
for windows users run your file on Firefox problem solved, or
if you want to use chrome easiest way for me was to install Python 3 then from command prompt run command python -m http.server then go to http://localhost:8000/ then navigate to your files
python -m http.server
Easy solution for whom using VS Code
I've been getting this error for a while. Most of the answers works. But I found a different solution. If you don't want to deal with node.js or any other solution in here and you are working with an HTML file (calling functions from another js file or fetch json api's) try to use Live Server extension.
It allows you to open a live server easily. And because of it creates localhost server, the problem is resolving. You can simply start the localhost by open a HTML file and right-click on the editor and click on Open with Live Server.
It basically load the files using http://localhost/index.html instead of using file://....
EDIT
It is not necessary to have a .html file. You can start the Live Server with shortcuts.
Hit (alt+L, alt+O) to Open the Server and (alt+L, alt+C) to Stop the server. [On MAC, cmd+L, cmd+O and cmd+L, cmd+C]
Hope it will help someone :)
If you use old version of Mozilla Firefox (pre-2019), it will work as expected without any issues;
P.S. Surprisingly, old versions of Internet Explorer & Edge work absolutely fine too.
For those on Windows without Python or Node.js, there is still a lightweight solution: Mongoose.
All you do is drag the executable to wherever the root of the server should be, and run it. An icon will appear in the taskbar and it'll navigate to the server in the default browser.
Also, Z-WAMP is a 100% portable WAMP that runs in a single folder, it's awesome. That's an option if you need a quick PHP and MySQL server. Though it hasn't been updated since 2013. A modern alternative would be Laragon or WinNMP. I haven't tested them, but they are portable and worth mentioning.
Also, if you only want the absolute basics (HTML+JS), here's a tiny PowerShell script that doesn't need anything to be installed or downloaded:
$Srv = New-Object Net.HttpListener;
$Srv.Prefixes.Add("http://localhost:8080/");
$Srv.Start();
Start-Process "http://localhost:8080/index.html";
While($Srv.IsListening) {
$Ctx = $Srv.GetContext();
$Buf = [System.IO.File]::OpenRead((Join-Path $Pwd($Ctx.Request.RawUrl)));
$Ctx.Response.ContentLength64 = $Buf.Length;
$Ctx.Response.Headers.Add("Content-Type", "text/html");
$Buf.CopyTo($Ctx.Response.OutputStream);
$Buf.Close();
$Ctx.Response.Close();
};
This method is very barebones, it cannot show directories or other fancy stuff. But it handles these CORS errors just fine.
Save the script as server.ps1 and run in the root of your project. It will launch index.html in the directory it is placed in.
I suspect it's already mentioned in some of the answers, but I'll slightly modify this to have complete working answer (easier to find and use).
Go to: https://nodejs.org/en/download/. Install nodejs.
Install http-server by running command from command prompt npm install -g http-server.
Change into your working directory, where index.html/yoursome.html resides.
Start your http server by running command http-server -c-1
Open web browser to http://localhost:8080
or http://localhost:8080/yoursome.html - depending on your html filename.
I was getting this exact error when loading an HTML file on the browser that was using a json file from the local directory. In my case, I was able to solve this by creating a simple node server that allowed to server static content. I left the code for this at this other answer.
It simply says that the application should be run on a web server. I had the same problem with chrome, I started tomcat and moved my application there, and it worked.
I suggest you use a mini-server to run these kind of applications on localhost (if you are not using some inbuilt server).
Here's one that is very simple to setup and run:
https://www.npmjs.com/package/tiny-server
Experienced this when I downloaded a page for offline view.
I just had to remove the integrity="*****" and crossorigin="anonymous" attributes from all <link> and <script> tags
If you insist on running the .html file locally and not serving it with a webserver, you can prevent those cross origin requests from happening in the first place by making the problematic resources available inline.
I had this problem when trying to to serve .js files through file://. My solution was to update my build script to replace <script src="..."> tags with <script>...</script>.
Here's a gulp approach for doing that:
1.
run npm install --save-dev to packages gulp, gulp-inline and del.
2.
After creating a gulpfile.js to the root directory, add the following code (just change the file paths for whatever suits you):
let gulp = require('gulp');
let inline = require('gulp-inline');
let del = require('del');
gulp.task('inline', function (done) {
gulp.src('dist/index.html')
.pipe(inline({
base: 'dist/',
disabledTypes: 'css, svg, img'
}))
.pipe(gulp.dest('dist/').on('finish', function(){
done()
}));
});
gulp.task('clean', function (done) {
del(['dist/*.js'])
done()
});
gulp.task('bundle-for-local', gulp.series('inline', 'clean'))
Either run gulp bundle-for-local or update your build script to run it automatically.
You can see the detailed problem and solution for my case here.
For all y'all on MacOS... setup a simple LaunchAgent to enable these glamorous capabilities in your own copy of Chrome...
Save a plist, named whatever (launch.chrome.dev.mode.plist, for example) in ~/Library/LaunchAgents with similar content to...
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>launch.chrome.dev.mode</string>
<key>ProgramArguments</key>
<array>
<string>/Applications/Google Chrome.app/Contents/MacOS/Google Chrome</string>
<string>-allow-file-access-from-files</string>
</array>
<key>RunAtLoad</key>
<true/>
</dict>
</plist>
It should launch at startup.. but you can force it to do so at any time with the terminal command
launchctl load -w ~/Library/LaunchAgents/launch.chrome.dev.mode.plist
TADA! 😎 💁🏻 🙊 🙏🏾
Not possible to load static local files(eg:svg) without server. If you have NPM /YARN installed in your machine, you can setup simple http server using "http-server"
npm install http-server -g
http-server [path] [options]
Or open terminal in that project folder and type "hs". It will automaticaly start HTTP live server.
er. I just found some official words "Attempting to load unbuilt, remote AMD modules that use the dojo/text plugin will fail due to cross-origin security restrictions. (Built versions of AMD modules are unaffected because the calls to dojo/text are eliminated by the build system.)" https://dojotoolkit.org/documentation/tutorials/1.10/cdn/
One way it worked loading local files is using them with in the project folder instead of outside your project folder. Create one folder under your project example files similar to the way we create for images and replace the section where using complete local path other than project path and use relative url of file under project folder .
It worked for me
Install local webserver for java e.g Tomcat,for php you can use lamp etc
Drop the json file in the public accessible app server directory
Start the app server,and you should be able to access the file from localhost
For Linux Python users:
import webbrowser
browser = webbrowser.get('google-chrome --allow-file-access-from-files %s')
browser.open(url)
url should be like:
createUserURL = "http://www.localhost:3000/api/angular/users"
instead of:
createUserURL = "localhost:3000/api/angular/users"
Many problem for this, with my problem is missing '/' example:
jquery-1.10.2.js:8720 XMLHttpRequest cannot load http://localhost:xxxProduct/getList_tagLabels/
It's must be: http://localhost:xxx/Product/getList_tagLabels/
I hope this help for who meet this problem.
I have also been able to recreate this error message when using an anchor tag with the following href:
Example a tag
In my case an a tag was being used to get the 'Pointer Cursor' and the event was actually controlled by some jQuery on click event. I removed the href and added a class that applies:
cursor:pointer;
cordova achieve this. I still can not figure out how cordova did. It does not even go through shouldInterceptRequest.
Later I found out that the key to load any file from local is: myWebView.getSettings().setAllowUniversalAccessFromFileURLs(true);
And when you want to access any http resource, the webview will do checking with OPTIONS method, which you can grant the access through WebViewClient.shouldInterceptRequest by return a response, and for the following GET/POST method, you can just return null.
If you are searching for a solution for Firebase Hosting, you can run the
firebase serve --only hosting command from the Firebase CLI
That's what I came here for, so I thought I'd just leave it here to help like ones.
If your using VS code just trying loading a live server in there. fixed my problem immediately.

React/Electron Production Build giving CORS error when loading manifest.json from index.hml [duplicate]

I'm trying to load a 3D model, stored locally on my computer, into Three.js with JSONLoader, and that 3D model is in the same directory as the entire website.
I'm getting the "Cross origin requests are only supported for HTTP." error, but I don't know what's causing it nor how to fix it.
My crystal ball says that you are loading the model using either file:// or C:/, which stays true to the error message as they are not http://
So you can either install a webserver in your local PC or upload the model somewhere else and use jsonp and change the url to http://example.com/path/to/model
Origin is defined in RFC-6454 as
...they have the same
scheme, host, and port. (See Section 4 for full details.)
So even though your file originates from the same host (localhost), but as long as the scheme is different (http / file), they are treated as different origin.
Just to be explicit - Yes, the error is saying you cannot point your browser directly at file://some/path/some.html
Here are some options to quickly spin up a local web server to let your browser render local files
Python 2
If you have Python installed...
Change directory into the folder where your file some.html or file(s) exist using the command cd /path/to/your/folder
Start up a Python web server using the command python -m SimpleHTTPServer
This will start a web server to host your entire directory listing at http://localhost:8000
You can use a custom port python -m SimpleHTTPServer 9000 giving you link: http://localhost:9000
This approach is built in to any Python installation.
Python 3
Do the same steps, but use the following command instead python3 -m http.server
VSCode
If you are using Visual Studio Code you can install the Live Server extension which provides a local web server enviroment.
Node.js
Alternatively, if you demand a more responsive setup and already use nodejs...
Install http-server by typing npm install -g http-server
Change into your working directory, where yoursome.html lives
Start your http server by issuing http-server -c-1
This spins up a Node.js httpd which serves the files in your directory as static files accessible from http://localhost:8080
Ruby
If your preferred language is Ruby ... the Ruby Gods say this works as well:
ruby -run -e httpd . -p 8080
PHP
Of course PHP also has its solution.
php -S localhost:8000
In Chrome you can use this flag:
--allow-file-access-from-files
Read more here.
Ran in to this today.
I wrote some code that looked like this:
app.controller('ctrlr', function($scope, $http){
$http.get('localhost:3000').success(function(data) {
$scope.stuff = data;
});
});
...but it should've looked like this:
app.controller('ctrlr', function($scope, $http){
$http.get('http://localhost:3000').success(function(data) {
$scope.stuff = data;
});
});
The only difference was the lack of http:// in the second snippet of code.
Just wanted to put that out there in case there are others with a similar issue.
Just change the url to http://localhost instead of localhost. If you open the html file from local, you should create a local server to serve that html file, the simplest way is using Web Server for Chrome. That will fix the issue.
I'm going to list 3 different approaches to solve this issue:
Using a very lightweight npm package: Install live-server using npm install -g live-server. Then, go to that directory open the terminal and type live-server and hit enter, page will be served at localhost:8080. BONUS: It also supports hot reloading by default.
Using a lightweight Google Chrome app developed by Google: Install the app, then go to the apps tab in Chrome and open the app. In the app point it to the right folder. Your page will be served!
Modifying Chrome shortcut in windows: Create a Chrome browser's shortcut. Right-click on the icon and open properties. In properties, edit target to "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --disable-web-security --user-data-dir="C:/ChromeDevSession" and save. Then using Chrome open the page using ctrl+o. NOTE: Do NOT use this shortcut for regular browsing.
Note: Use http:// like http://localhost:8080 in case you face error.
Use http:// or https:// to create url
error: localhost:8080
solution: http://localhost:8080
In an Android app — for example, to allow JavaScript to have access to assets via file:///android_asset/ — use setAllowFileAccessFromFileURLs(true) on the WebSettings that you get from calling getSettings() on the WebView.
fastest way for me was:
for windows users run your file on Firefox problem solved, or
if you want to use chrome easiest way for me was to install Python 3 then from command prompt run command python -m http.server then go to http://localhost:8000/ then navigate to your files
python -m http.server
Easy solution for whom using VS Code
I've been getting this error for a while. Most of the answers works. But I found a different solution. If you don't want to deal with node.js or any other solution in here and you are working with an HTML file (calling functions from another js file or fetch json api's) try to use Live Server extension.
It allows you to open a live server easily. And because of it creates localhost server, the problem is resolving. You can simply start the localhost by open a HTML file and right-click on the editor and click on Open with Live Server.
It basically load the files using http://localhost/index.html instead of using file://....
EDIT
It is not necessary to have a .html file. You can start the Live Server with shortcuts.
Hit (alt+L, alt+O) to Open the Server and (alt+L, alt+C) to Stop the server. [On MAC, cmd+L, cmd+O and cmd+L, cmd+C]
Hope it will help someone :)
If you use old version of Mozilla Firefox (pre-2019), it will work as expected without any issues;
P.S. Surprisingly, old versions of Internet Explorer & Edge work absolutely fine too.
For those on Windows without Python or Node.js, there is still a lightweight solution: Mongoose.
All you do is drag the executable to wherever the root of the server should be, and run it. An icon will appear in the taskbar and it'll navigate to the server in the default browser.
Also, Z-WAMP is a 100% portable WAMP that runs in a single folder, it's awesome. That's an option if you need a quick PHP and MySQL server. Though it hasn't been updated since 2013. A modern alternative would be Laragon or WinNMP. I haven't tested them, but they are portable and worth mentioning.
Also, if you only want the absolute basics (HTML+JS), here's a tiny PowerShell script that doesn't need anything to be installed or downloaded:
$Srv = New-Object Net.HttpListener;
$Srv.Prefixes.Add("http://localhost:8080/");
$Srv.Start();
Start-Process "http://localhost:8080/index.html";
While($Srv.IsListening) {
$Ctx = $Srv.GetContext();
$Buf = [System.IO.File]::OpenRead((Join-Path $Pwd($Ctx.Request.RawUrl)));
$Ctx.Response.ContentLength64 = $Buf.Length;
$Ctx.Response.Headers.Add("Content-Type", "text/html");
$Buf.CopyTo($Ctx.Response.OutputStream);
$Buf.Close();
$Ctx.Response.Close();
};
This method is very barebones, it cannot show directories or other fancy stuff. But it handles these CORS errors just fine.
Save the script as server.ps1 and run in the root of your project. It will launch index.html in the directory it is placed in.
I suspect it's already mentioned in some of the answers, but I'll slightly modify this to have complete working answer (easier to find and use).
Go to: https://nodejs.org/en/download/. Install nodejs.
Install http-server by running command from command prompt npm install -g http-server.
Change into your working directory, where index.html/yoursome.html resides.
Start your http server by running command http-server -c-1
Open web browser to http://localhost:8080
or http://localhost:8080/yoursome.html - depending on your html filename.
I was getting this exact error when loading an HTML file on the browser that was using a json file from the local directory. In my case, I was able to solve this by creating a simple node server that allowed to server static content. I left the code for this at this other answer.
It simply says that the application should be run on a web server. I had the same problem with chrome, I started tomcat and moved my application there, and it worked.
I suggest you use a mini-server to run these kind of applications on localhost (if you are not using some inbuilt server).
Here's one that is very simple to setup and run:
https://www.npmjs.com/package/tiny-server
Experienced this when I downloaded a page for offline view.
I just had to remove the integrity="*****" and crossorigin="anonymous" attributes from all <link> and <script> tags
If you insist on running the .html file locally and not serving it with a webserver, you can prevent those cross origin requests from happening in the first place by making the problematic resources available inline.
I had this problem when trying to to serve .js files through file://. My solution was to update my build script to replace <script src="..."> tags with <script>...</script>.
Here's a gulp approach for doing that:
1.
run npm install --save-dev to packages gulp, gulp-inline and del.
2.
After creating a gulpfile.js to the root directory, add the following code (just change the file paths for whatever suits you):
let gulp = require('gulp');
let inline = require('gulp-inline');
let del = require('del');
gulp.task('inline', function (done) {
gulp.src('dist/index.html')
.pipe(inline({
base: 'dist/',
disabledTypes: 'css, svg, img'
}))
.pipe(gulp.dest('dist/').on('finish', function(){
done()
}));
});
gulp.task('clean', function (done) {
del(['dist/*.js'])
done()
});
gulp.task('bundle-for-local', gulp.series('inline', 'clean'))
Either run gulp bundle-for-local or update your build script to run it automatically.
You can see the detailed problem and solution for my case here.
For all y'all on MacOS... setup a simple LaunchAgent to enable these glamorous capabilities in your own copy of Chrome...
Save a plist, named whatever (launch.chrome.dev.mode.plist, for example) in ~/Library/LaunchAgents with similar content to...
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>launch.chrome.dev.mode</string>
<key>ProgramArguments</key>
<array>
<string>/Applications/Google Chrome.app/Contents/MacOS/Google Chrome</string>
<string>-allow-file-access-from-files</string>
</array>
<key>RunAtLoad</key>
<true/>
</dict>
</plist>
It should launch at startup.. but you can force it to do so at any time with the terminal command
launchctl load -w ~/Library/LaunchAgents/launch.chrome.dev.mode.plist
TADA! 😎 💁🏻 🙊 🙏🏾
Not possible to load static local files(eg:svg) without server. If you have NPM /YARN installed in your machine, you can setup simple http server using "http-server"
npm install http-server -g
http-server [path] [options]
Or open terminal in that project folder and type "hs". It will automaticaly start HTTP live server.
er. I just found some official words "Attempting to load unbuilt, remote AMD modules that use the dojo/text plugin will fail due to cross-origin security restrictions. (Built versions of AMD modules are unaffected because the calls to dojo/text are eliminated by the build system.)" https://dojotoolkit.org/documentation/tutorials/1.10/cdn/
One way it worked loading local files is using them with in the project folder instead of outside your project folder. Create one folder under your project example files similar to the way we create for images and replace the section where using complete local path other than project path and use relative url of file under project folder .
It worked for me
Install local webserver for java e.g Tomcat,for php you can use lamp etc
Drop the json file in the public accessible app server directory
Start the app server,and you should be able to access the file from localhost
For Linux Python users:
import webbrowser
browser = webbrowser.get('google-chrome --allow-file-access-from-files %s')
browser.open(url)
url should be like:
createUserURL = "http://www.localhost:3000/api/angular/users"
instead of:
createUserURL = "localhost:3000/api/angular/users"
Many problem for this, with my problem is missing '/' example:
jquery-1.10.2.js:8720 XMLHttpRequest cannot load http://localhost:xxxProduct/getList_tagLabels/
It's must be: http://localhost:xxx/Product/getList_tagLabels/
I hope this help for who meet this problem.
I have also been able to recreate this error message when using an anchor tag with the following href:
Example a tag
In my case an a tag was being used to get the 'Pointer Cursor' and the event was actually controlled by some jQuery on click event. I removed the href and added a class that applies:
cursor:pointer;
cordova achieve this. I still can not figure out how cordova did. It does not even go through shouldInterceptRequest.
Later I found out that the key to load any file from local is: myWebView.getSettings().setAllowUniversalAccessFromFileURLs(true);
And when you want to access any http resource, the webview will do checking with OPTIONS method, which you can grant the access through WebViewClient.shouldInterceptRequest by return a response, and for the following GET/POST method, you can just return null.
If you are searching for a solution for Firebase Hosting, you can run the
firebase serve --only hosting command from the Firebase CLI
That's what I came here for, so I thought I'd just leave it here to help like ones.
If your using VS code just trying loading a live server in there. fixed my problem immediately.

Failed to register a ServiceWorker (Flutter)

I'm working on a Flutter Web App and today I got these errors:
A bad HTTP response code (404) was received when fetching the script.
Uncaught (in promise) TypeError: Failed to register a
ServiceWorker for scope ('https://adrieldf.github.io/') with script
('https://adrieldf.github.io/flutter_service_worker.js'): A bad HTTP
response code (404) was received when fetching the script.
The only thing "different" that I added to the code was a dependency for the Share library, but I don't think that that is the problem.
Here is the interesting thing, I've got the app hosted on Github Pages and after every commit I have a action that builds the web app. After the build, when I try to access it doesn't load and the errors appears. But building it and running it locally works normally.
Here is the source code if you want to check: https://github.com/Adrieldf/allthewidgets
The website link is in the repo description.
I solved my problem by changing the index.html file
from
<base href="/">
to
<base href="/directory_name/">
Looks, like you are trying to run the project from the project_root/web folder.
If you just start a webserver here (for example, by using python -m http.server 8088), the application will start and even will be working partially.
But compiled web app located in project_root/build/web. Try to run your webserver in that folder.
Solved by
changing base tag inside build/web/index.html
<base href="/">
to
<base href="./">
added . (dot)
Well, the problem is what the error message says. Your JS is trying to register a Service Worker from the script 'https://adrieldf.github.io/flutter_service_worker.js' but that does not exist on the server. If you open that URL it's a 404.
For me got resolved simply after upgrading flutter packages:
flutter packages upgrade
flutter create .
flutter build web
and use the project/build/web as server's location
you can use peanut to build your flutter app and copy it to gh-pages project using something like:
peanut --extra-args "--base-href=/directory-name/"
Solved by changing base tag inside build/web/index.html
<base href="/">
to
added . (dot) with the folder name inside which i added my flutter build
<base href="./flutter/portfolio">
If your PC web and Mobile web are different, you can try to upload flutter_ service_ worker.js in your PC web

Installed Node + vue-cli on AWS. But get a blank page?

Ok, learning here. Installed the default vue-cli app on AWS. I do a npm run build. When I launch the default index.html I'm served a blank page. If I go into dist, there is another index.html, that serves links to js files, but still a blank page.
I'm guessing webpack wants me to launch an index.html, but don't see how I can hit that with a browser. No errors anywhere. But no Hello World either. thanks for help.
What I'm seeing in the browser:
<!DOCTYPE html><html><head><meta charset=utf-8><title>hello-world</title><link href=/static/css/app.87e65e7c83fb67c04e58d4461a7fd8e8.css rel=stylesheet></head><body><div id=app></div><script type=text/javascript src=/static/js/manifest.fa7eecfb52900d1cfb0a.js></script><script type=text/javascript src=/static/js/vendor.9baeef453ba99a70f46a.js></script><script type=text/javascript src=/static/js/app.cdfbb21001bbc43de4bc.js></script></body></html>
When you npm run build Webpack should produce an index.html file along with a static/ directory that contains all of your javascript and css. The link to static/ is an absolute link (i.e. http://example.org/static). When you try to open index.html as a file, the browser will look for the /static/ folder on the root of your file system, which of course it won't find.
To run it locally you need to fire up an http server locally. One option is to cd into the directory with a terminal app and run python -m http.server. Then go to http://localhost:8000/. That should work because the root of the directory tree will be the folder from where you are serving it.
Getting it running on AWS S3 will be a matter of making sure you get the static directory in the right place and get the links pointing to it. Hard to say exactly how without knowing details of how you are organizing the site in your bucket.
You can change how the static folder is saved in the webpack config if you need to: https://vuejs-templates.github.io/webpack/static.html
You will find a folder named /dist in your project directory.Just point the index.html file within the /dist directory and rest will work fine I think. I have just done that and it's working fine.
Hope it will work.
Thanks.

Node JS newbie: why do I get a 404? (angular-seed)

I'm trying NodeJS for the first time.
I'm following the hello world instructions at https://github.com/angular/angular-seed and https://github.com/thedigitalself/angular-sprout (which has the same hello world instructions for a slightly modified fork of the first one).
In both cases, I'm supposed to just run a web-server.js file that is included in the repo using Node and then navigate to http://localhost:<port>/app/index.html
This gives me a 404 error page (which is written in the web-server.js file), as does just /app/.
But if I navigate to http://localhost:<port> I get a directory listing for the filesystem directory where the web-server.js script is, which is also written in web-server.js.
Any idea why web-server.js cannot find /app/ or /app/index.html?
Make sure you run the server from your root directory.
~/angular-seed/
In here you do node scripts/web-server.js
Then you can visit
http://localhost:<PORT>/app/index.html

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