all!
I am developing an application which receives data from a temperature sensor and prints it dynamically in a flask-served webpage at localhost:5000.
To receive the data from the temperature sensor, an udp server is employed. The receive function is implemented inside a thread. To "real-time" print data to the webpage, socketio is employed - it all runs inside "app.py".
The problem which I am facing is the slowness to print data in the webpage. To test my code I developed an udp client (client.py) which connects to my app.py and, via user input, sends data. What I am observing is that the socket receives the data (I am able to print everything I send in client.py and everything I receive in app.py) but something between my socketio emit function and the website feedback makes this update process slow.
Am I missing something? Could you guys help me out discovering why is this process so slow in my code?
All help is much appreciated!! Many thanks!!
app.py
from flask import Flask, render_template, flash, url_for, redirect, request
from flask_sqlalchemy import SQLAlchemy
from flask_socketio import SocketIO, emit
import socket
import threading
HOST = ''
PORT = 3456
udp = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
orig = (HOST, PORT)
udp.bind(orig)
app = Flask(__name__)
app.config ['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///measurements.sqlite3'
app.config ['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
app.config['SECRET_KEY'] = "secret!"
async_mode = None
socketio = SocketIO(app, async_mode=async_mode)
def thread_function():
last_temp = 0
while True:
temperatura, client = udp.recvfrom(5)
temp = float(temperatura)
print("Temp: " + str(temp))
print("Last temp: " + str(last_temp))
if (temp != last_temp):
socketio.emit('my_response', {'temp': temp})
print("I am here!")
last_temp = temp
udp.close()
receive_thread = threading.Thread(target=thread_function)
receive_thread.start()
#app.route('/')
def home():
# Home acts as a dashboard for the page
return render_template('index.html')
if __name__ == '__main__':
socketio.run(app)
client.py
import socket
HOST = '127.0.0.1'
PORT = 3456
udp = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
dest = (HOST, PORT)
print('Para sair use CTRL+X\n')
msg = input()
while msg != '\n':
udp.sendto(bytes(msg, "utf-8"), dest)
msg = input()
udp.close()
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Temperature sense</title>
<style>
img {
display: block;
margin-left: auto;
margin-right: auto;
}
button {
background-color: #4180a0;
border: none;
border-radius: 8px;
color: white;
<!--- padding: 32px 64px; --->
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
<!--- margin: 4px 2px; --->
cursor: pointer;
width: 128px;
height: 64px;
}
button.button:hover{
background-color: #2a2349;
}
div {
border: 1px;
border-style: solid;
border-color: #bebbb2;
padding: 8px;
}
measurementPrint{
border: 1px;
border-style: solid;
border-color: #bebbb2;
padding: 8px;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js" integrity="sha512-bLT0Qm9VnAYZDflyKcBaQ2gg0hSYNQrJ8RilYldYQ1FxQYoCLtUjuuRuZo+fjqhx/qtq/1itJ0C2ejDxltZVFg==" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/3.0.4/socket.io.js" integrity="sha512-aMGMvNYu8Ue4G+fHa359jcPb1u+ytAF+P2SCb+PxrjCdO3n3ZTxJ30zuH39rimUggmTwmh2u7wvQsDTHESnmfQ==" crossorigin="anonymous"></script>
<script type="text/javascript" charset="utf-8">
$(document).ready(function() {
// Connect to the Socket.IO server.
// The connection URL has the following format, relative to the current page:
// http[s]://<domain>:<port>[/<namespace>]
var socket = io();
// Event handler for server sent data.
// The callback function is invoked whenever the server emits data
// to the client. The data is then displayed in the "Received"
// section of the page.
socket.on('my_response', function(msg) {
$('#log').text(msg.temp);
});
});
</script>
</head>
<body>
<div>
<img src="/static/images/mentorphotonics.jpeg" class="center" alt="Mentor Photonics" width="200" height=auto />
<p>
<a href=/ ><button class=button >Realtime</button></a>
<measurementPrint>
<b>Temperature: <span id="log"></span></b>
</measurementPrint>
</p>
<p><a href=export ><button class=button >Export</button></a></p>
<p><a href=about ><button class=button >About</button></a></p>
</div>
</body>
</html>
guys
I re-studied the example from Miguel Grinberg's tutorial at https://github.com/miguelgrinberg/Flask-SocketIO and I adjusted the code.
The main issues were:
I was not using the "thread = socketio.start_background_task(background_thread)" structed, as he used with the #socketio.event
UDP's recvfrom is blocking. To solve this issue I set a timeout "udp.settimeout(0.1)" so it becomes non-blocking. However, now you should use the try;exception pair when the timeout occurs.
Regards, Fávero
Related
I have created a new Nativescript-Vue project but the CSS is not working, scoped and global. But inline CSS like the code blocks below are working properly.
<ActionBar style="background-color: green" flat title="Nativescript">
and
<ActionBar backgroundColor="green" flat title="Nativescript">
Any tips? TIA
Here is my main.js:
import Vue from 'nativescript-vue'
import Home from './components/Home'
import VueDevtools from 'nativescript-vue-devtools'
import FontIcon from 'nativescript-vue-fonticon'
import store from './store'
if(TNS_ENV !== 'production') {
Vue.use(VueDevtools, {
host: "192.168.42.28" // IP of the machine you are writing your code on, _not_ the Device IP your app runs on
})
}
// Prints Vue logs when --env.production is *NOT* set while building
Vue.config.silent = (TNS_ENV === 'production')
Vue.use(FontIcon, {
debug: true, // <-- Optional. Will output the css mapping to console.
paths: {
'fa': './assets/css/fontawesome.min.css',
'far': './assets/css/regular.min.css',
'fas': './assets/css/solid.min.css',
'fab': './assets/css/brands.min.css'
}
})
new Vue({
store,
render: h => h('frame', [h(Home)])
}).$start()
And here is my Home.vue
<template>
<Page>
<ActionBar style="background-color: green" flat title="Nativescript">
<ActionItem ios.position="right">
<FontIcon name="fa-shopping-bag" type="fas"/>
</ActionItem>
</ActionBar>
<StackLayout>
<Label class="message" :text="msg"/>
</StackLayout>
</Page>
</template>
<script>
export default {
data() {
return {
msg: 'Welcome to Nativescript',
}
}
}
</script>
<style scoped>
ActionBar {
background-color: #53ba82;
color: #ffffff;
}
.message {
vertical-align: center;
text-align: center;
font-size: 20;
color: #333333;
}
</style>
This issue has been fixed in #nativescript/webpack#3.0.3.
Make sure you update the webpack plugin:
ns clean
npm i --save-dev #nativescript/webpack#^3.0.3
ns run <platform>
Details in pinned issue: https://github.com/nativescript-vue/nativescript-vue/issues/715
I'm building my website with Flutter but programming for web is very new to me and I'm not quite sure I understand exactly how Cookies work.
I still need to understand what cookies are to be written where, and where do I take those cookies from.
Building the banner to manage the should be easy, and if I'm not wrong it should be the first thing that pops up in the home page.
For example Medium banner is just a dismissible banner swing the message
To make Medium work, we log user data. By using Medium, you agree to our Privacy Policy.
with a link the Privacy Policy, but it doesn't have any opt-in so it doesn't look GDPR compliant..
Here https://medium.com/#mayur_solanki/flutter-web-formerly-hummingbird-ba52f5135fb0 shows how cookies are written and read in flutter web
html.window.localStorage['key']
html.window.sessionStorage['key']
html.window.document.cookie
html.window.localStorage['local_value'] = localStorage;
html.window.sessionStorage['session_value'] = sessionStorage;
html.window.document.cookie= "username=${cookies}; expires=Thu, 18 Dec 2020 12:00:00 UTC";
As far as I understood cookies are of these types.
First-party:
To track user behavior( page visits , number of users etc..) and as I use google Analytics I do need to ask consent for these.
here Google Analytics, Flutter, cookies and the General Data Protection Regulation (GDPR) is shown how to activate/deactivate it, so I shouldn't store anything myself if I'm not wrong.
Third-party:
These would be from a YouTube linked video on my Home page for example, so I need to ask consent for these too.
Haven't checked it yet but I guess it should be similar to Google Analytics
Session cookies:
These should be used to remember Items in a shopping basket.
I shouldn't be needing these..
Persistent cookies:
These should be for keeping user's logged in.
One of the web pages is the Retailer access, which is retailer's app (the supply side of the marketplace ).
I'm using Google signing to log in users, so I should be needing these, as the login form it always presented to users when navigating to Retailer access even after they logged in.
Secure cookies:
These are for https only and used for check-out/payment pages.
In my web the retailer's app only creates products, manages workshop bookings, and handles communication with customers..
The mobile app (the demand side of the marketplace) is where all the payments are made using Stripe, so I shouldn't have to store anything on web..right?
Sorry for the long question, I hope it's clear enough.
Thank you for your help.
I basically had the problem since I am also using third-party scripts (firebase, stripe, ...) and I need the user's consent before any of those scripts are run.
I build my solution around Yett (https://github.com/elbywan/yett), which blocks scripts that are part of a previously defined blacklist. You could even implement this functionality by yourself, the author has written an interesting medium article.
In my case I only have "essential" scripts, so I built a solution where the flutter app loads only if the user consented to the all necessary scripts. But it shouldn't be too difficult to adjust this solution if one needs more fined grained control about the user's cookie settings and I added a second entry for "Analytics" as a possible starting point.
I store the user's settings in the localStorage and retrieve them directly on app start to create the blacklist and to decide whether the cookie banner should be shown.
This is my index.html.
It references the following scripts: get_consent.js, set_consent.js, init_firebase.js and load_app.js (more info on them below).
<!DOCTYPE html>
<html>
<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 new Flutter project.">
<!-- 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="flutter_utils">
<link rel="apple-touch-icon" href="icons/Icon-192.png">
<!-- Assigns blacklist of urls based on localStorage (must be placed before yett script) -->
<script src="get_consent.js"></script>
<!-- Yett is used to block all third-party scripts that are part of the blacklist (must be placed before all other (third-party) scripts) -->
<script src="https://unpkg.com/yett"></script>
<script src="https://js.stripe.com/v3/"></script>
<title>flutter_utils</title>
<link rel="manifest" href="manifest.json">
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<!-- The standard consent popup (hidden by default) -->
<div id="consent-popup" class="hidden consent-div">
<h2>We use cookies and other technologies</h2>
<p>This website uses cookies and similar functions to process end device information and personal data. The processing serves the integration of content, external services and elements of third parties, statistical analysis/measurement, personalized advertising and the integration of social media. Depending on the function, data may be passed on to third parties within the EU in the process. Your consent is always voluntary, not required for the use of our website and can be rejected or revoked at any time via the icon at the bottom right.
</p>
<div>
<button id="accept-btn" class="btn inline">Accept</button>
<button id="reject-btn" class="btn inline">Reject</button>
<button id="info-btn" class="btn inline">More info</button>
</div>
</div>
<!-- Detailed consent popup allows the user to control scripts by their category -->
<div id="consent-popup-details" class="hidden consent-div">
<h2>Choose what to accept</h2>
<div>
<div class="row-div">
<h3>Essential</h3>
<label class="switch">
<!-- Essentials must always be checked -->
<input id="essential-cb" type="checkbox" checked disabled=true>
<span class="slider round"></span>
</label>
</div>
<p>
Here you can find all technically necessary scripts, cookies and other elements that are necessary for the operation of the website.
</p>
</div>
<div>
<div class="row-div">
<h3>Analytics</h3>
<label class="switch">
<input id ="analytics-cb" type="checkbox">
<span class="slider round"></span>
</label>
</div>
<p>
For the site, visitors, web page views and diveerse other data are stored anonymously.
</p>
</div>
<div>
<button id="save-btn" class="btn inline">Save</button>
<button id="cancel-btn" class="btn inline">Cancel</button>
</div>
</div>
<!-- Updates localStorage with user's cookie settings -->
<script src="set_consent.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-auth.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-storage.js"></script>
<!-- Initializes firebase (if user gave consent) -->
<script src="init_firebase.js"></script>
<!-- Loads flutter app (if user gave consent) -->
<script src="load_app.js"></script>
</body>
</html>
The get_consent.js is the first script, retrieves the user's settings from localStorage and also defines the yett blacklist:
const essentialCookies = ["js.stripe.com", "www.gstatic.com"];
const analyticsCookies = ["www.google-analytics.com"];
const allCookies = [...essentialCookies, ...analyticsCookies];
const consentPropertyName = "cookie_consent";
const retrieveConsentSettings = () => {
const consentJsonString = localStorage.getItem(consentPropertyName);
return JSON.parse(consentJsonString);
};
const checkConsentIsMissing = () => {
const consentObj = retrieveConsentSettings();
if (!consentObj || consentObj.length == 0) {
return true;
}
return false;
};
const consentIsMissing = checkConsentIsMissing();
var blacklist;
if (consentIsMissing) {
blacklist = allCookies;
} else {
const acceptedCookies = retrieveConsentSettings();
// Remove all script urls from blacklist that the user accepts (if all are accepted the blacklist will be empty)
blacklist = allCookies.filter( ( el ) => !acceptedCookies.includes( el ) );
}
// Yett blacklist expects list of RegExp objects
var blacklistRegEx = [];
for (let index = 0; index < blacklist.length; index++) {
const regExp = new RegExp(blacklist[index]);
blacklistRegEx.push(regExp);
}
YETT_BLACKLIST = blacklistRegEx;
set_consent.js is responsible for updating localStorage with the user's settings and also hides/shows the respective divs for the cookie consent. Usually, one could simply call window.yett.unblock() to unblock the scripts, but since their order matters I decided to simply reload the window after the localStorage was updated:
const saveToStorage = (acceptedCookies) => {
const jsonString = JSON.stringify(acceptedCookies);
localStorage.setItem(consentPropertyName, jsonString);
};
window.onload = () => {
const consentPopup = document.getElementById("consent-popup");
const consentPopupDetails = document.getElementById("consent-popup-details");
const acceptBtn = document.getElementById("accept-btn");
const moreInfoBtn = document.getElementById("info-btn");
const saveBtn = document.getElementById("save-btn");
const cancelBtn = document.getElementById("cancel-btn");
const rejectBtn = document.getElementById("reject-btn");
const acceptFn = (event) => {
const cookiesTmp = [...essentialCookies, ...analyticsCookies];
saveToStorage(cookiesTmp);
// Reload window after localStorage was updated.
// The blacklist will then only contain items the user has not yet consented to.
window.location.reload();
};
const cancelFn = (event) => {
consentPopup.classList.remove("hidden");
consentPopupDetails.classList.add("hidden");
};
const rejectFn = (event) => {
console.log("Rejected!");
// Possible To-Do: Show placeholder content if even essential scripts are rejected.
};
const showDetailsFn = () => {
consentPopup.classList.add("hidden");
consentPopupDetails.classList.remove("hidden");
};
const saveFn = (event) => {
const analyticsChecked = document.getElementById("analytics-cb").checked;
var cookiesTmp = [...essentialCookies];
if (analyticsChecked) {
cookiesTmp.push(...analyticsCookies);
}
saveToStorage(cookiesTmp);
// Reload window after localStorage was updated.
// The blacklist will then only contain items the user has not yet consented to.
window.location.reload();
};
acceptBtn.addEventListener("click", acceptFn);
moreInfoBtn.addEventListener("click", showDetailsFn);
saveBtn.addEventListener("click", saveFn);
cancelBtn.addEventListener("click", cancelFn);
rejectBtn.addEventListener("click", rejectFn);
if (consentIsMissing) {
consentPopup.classList.remove("hidden");
}
};
init_firebase.js is the usual script for initializing the service, but I only inizialize if consent was obtained:
var firebaseConfig = {
// your standard config
};
// Initialize Firebase only if user consented
if (!consentIsMissing) {
firebase.initializeApp(firebaseConfig);
}
The same logic is applied to the script load_app.js. The Flutter app is only loaded if the user consented.
One might therefore add some fallback content to the index.html which would be shown if the user rejects the necessary scripts. Depending on your use case it might also be an option load the app anyway and then differentiate within the app by accessing the user's settings from localStorage.
var serviceWorkerVersion = null;
var scriptLoaded = false;
function loadMainDartJs() {
if (scriptLoaded) {
return;
}
scriptLoaded = true;
var scriptTag = document.createElement("script");
scriptTag.src = "main.dart.js";
scriptTag.type = "application/javascript";
document.body.append(scriptTag);
}
// Load app only if user consented
if (!consentIsMissing) {
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();
}
}
And here is my style.css:
html,
body {
height: 100%;
width: 100%;
background-color: #2d2d2d;
font-family: Arial, Helvetica, sans-serif;
}
.hidden {
display: none;
visibility: hidden;
}
.consent-div {
position: fixed;
bottom: 40px;
left: 10%;
right: 10%;
width: 80%;
padding: 14px 14px;
display: flex;
flex-direction: column;
align-items: center;
justify-content: space-between;
background-color: #eee;
border-radius: 5px;
box-shadow: 0 0 5px 5px rgba(0, 0, 0, 0.2);
}
.row-div {
display: flex;
justify-content: space-between;
align-items: center;
}
#accept-btn,
#save-btn {
background-color: #103900;
}
#reject-btn,
#cancel-btn {
background-color: #ff0000;
}
.btn {
height: 25px;
width: 140px;
background-color: #777;
border: none;
color: white;
border-radius: 5px;
cursor: pointer;
}
.inline {
display: inline-block;
margin-right: 5px;
}
h2 {
margin-block-start: 0.5em;
margin-block-end: 0em;
}
h3 {
margin-block-start: 0.5em;
margin-block-end: 0em;
}
/* The switch - the box around the slider */
.switch {
position: relative;
display: inline-block;
width: 50px;
height: 25px;
}
/* Hide default HTML checkbox */
.switch input {
opacity: 0;
width: 0;
height: 0;
}
/* The slider */
.slider {
position: absolute;
cursor: pointer;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: #ccc;
}
.slider:before {
position: absolute;
content: "";
height: 18px;
width: 18px;
left: 4px;
bottom: 4px;
background-color: white;
}
input:checked + .slider {
background-color: #2196f3;
}
input:focus + .slider {
box-shadow: 0 0 1px #2196f3;
}
input:checked + .slider:before {
-webkit-transform: translateX(24px);
-ms-transform: translateX(24px);
transform: translateX(24px);
}
/* Rounded sliders */
.slider.round {
border-radius: 34px;
}
.slider.round:before {
border-radius: 50%;
}
I'm trying the Image Tracking example as explained here - https://github.com/AR-js-org/AR.js#get-started
I've replaced the image and video with my own and added the whole project in an Amazon S3 bucket.
When I run the html page, I get an error in the browser console "Error in loading marker on Worker 403".
I'm assuming this indicates that the NFT image is somehow not loading. There are no CORS errors, or any other unauthorized errors indicated in the console.
Things I've tried after going through some pages on stack overflow (but they didn't help)-
Initially the image I was using was very basic, so I changed to the Pinball image so that AR.js gets more descriptions.
Disabled my chrome extensions like Ad Blocker etc.
Can someone help me with what is wrong or missing for the NFT to load properly?
Here's my code -
<script
src="https://cdn.jsdelivr.net/gh/aframevr/aframe#1c2407b26c61958baa93967b5412487cd94b290b/dist/aframe-master.min.js"></script>
<script src="https://raw.githack.com/AR-js-org/AR.js/master/aframe/build/aframe-ar-nft.js"></script>
<style>
.arjs-loader {
height: 100%;
width: 100%;
position: absolute;
top: 0;
left: 0;
background-color: rgba(0, 0, 0, 0.8);
z-index: 9999;
display: flex;
justify-content: center;
align-items: center;
}
.arjs-loader div {
text-align: center;
font-size: 1.25em;
color: white;
}
</style>
<body style="margin : 0px; overflow: hidden;">
<!-- minimal loader shown until image descriptors are loaded -->
<div class="arjs-loader">
<div>Loading, please wait...</div>
</div>
<a-scene
vr-mode-ui="enabled: false;"
renderer="logarithmicDepthBuffer: true;"
embedded
arjs="trackingMethod: best; sourceType: webcam;debugUIEnabled: false;"
>
<!-- we use cors proxy to avoid cross-origin problems -->
<a-nft
type="nft"
url="https://ar-js-image-tracking-1.s3.ap-south-1.amazonaws.com/ar-js-image-tracking-1/images/pinball.jpg"
smooth="true"
smoothCount="10"
smoothTolerance=".01"
smoothThreshold="5"
>
<a-entity
gltf-model="https://ar-js-image-tracking-1.s3.ap-south-1.amazonaws.com/ar-js-image-tracking-1/images/video1.mp4"
scale="5 5 5"
position="50 150 0"
>
</a-entity>
</a-nft>
<a-entity camera></a-entity>
</a-scene>
</body>
UPDATE:
I've changed my code to use an nft merker and a-video. But I'm still getting the same error. Here's the updated code:
<script src="https://cdn.jsdelivr.net/gh/aframevr/aframe#1c2407b26c61958baa93967b5412487cd94b290b/dist/aframe-master.min.js"></script>
<script src="https://raw.githack.com/AR-js-org/AR.js/master/aframe/build/aframe-ar-nft.js"></script>
<style>
.arjs-loader {
height: 100%;
width: 100%;
position: absolute;
top: 0;
left: 0;
background-color: rgba(0, 0, 0, 0.8);
z-index: 9999;
display: flex;
justify-content: center;
align-items: center;
}
.arjs-loader div {
text-align: center;
font-size: 1.25em;
color: white;
}
</style>
<body style="margin : 0px; overflow: hidden;">
<!-- minimal loader shown until image descriptors are loaded -->
<div class="arjs-loader">
<div>Loading, please wait...</div>
</div>
<a-scene
vr-mode-ui="enabled: false;"
renderer="logarithmicDepthBuffer: true;"
embedded
arjs="trackingMethod: best; sourceType: webcam;debugUIEnabled: false;"
>
<!-- we use cors proxy to avoid cross-origin problems -->
<a-nft
type="nft"
url="https://d2a3azuonia3td.cloudfront.net/ar-js-image-tracking-1/images/peacock-nft/peacock"
smooth="true"
smoothCount="10"
smoothTolerance=".01"
smoothThreshold="5"
>
<a-video
src="https://d2a3azuonia3td.cloudfront.net/ar-js-image-tracking-1/images/video1.mp4"
width="9"
height="9"
position="50 150 0"
>
</a-video>
</a-nft>
<a-entity camera></a-entity>
</a-scene>
</body>
UPDATE2 - #Kalwalt's solution resolved my issue. Additionally, turns out the my old html file was still cached in Cloudfront. I had to invalidate that file so that the newer version is pulled from S3 bucket.
The NFT Natural Feature Tracking use "descriptors" to track a desired image. To accomplish this you need to create your own descriptors, that is a NFT marker, you have two choices:
with the online tool carnaux.github.io/NFT-Marker-Creator/ easier to do but slower
the nodejs app but you need to download or clone the repository
Follow the instructions in the Readme or my tutorial.
You are getting that error "Error in loading marker on Worker 403". because you are trying to use a jpg image as NFT marker and this is not allowed.
Moreover you are trying to load a video instead of a gltf model. If you want to load a video you should use <a-video> primitive. For the gltf supply a gltf model with extension .gltf or .glb.
The marker you are using is a .jpg image which is not what a-nft need. You need to make the NFT from your image using this Carnaux NFT Marker Creator (which takes time)
Or follow this docs for Node version AR.js NFT Marker Creator Docs
Edit: Also, you are using <a-entity gltf-model...> but with .mp4 (video).
gltf-model is for .gltf or .glb format (3D model). If you want to use video use a-video
I created an API with WSO2 API Manager adding my own java Restful Service as Endpoint. Testing the service endpoint worked fine.
I subscribed to the API properly but when invoking the API with the swagger it returns the following body content:
<!DOCTYPE html>
<html>
<head>
<title>Apache Tomcat/8.0.45 - Error report</title>
<style type="text/css">
H1 {
font-family:Tahoma,Arial,sans-serif;
color:white;
background-color:#525D76;
font-size:22px;
}
H2 {
font-family:Tahoma,Arial,sans-serif;
color:white;
background-color:#525D76;
font-size:16px;
}
H3 {
font-family:Tahoma,Arial,sans-serif;
color:white;
background-color:#525D76;
font-size:14px;
}
BODY {
font-family:Tahoma,Arial,sans-serif;
color:black;
background-color:white;
}
B {
font-family:Tahoma,Arial,sans-serif;
color:white;
background-color:#525D76;
}
P {
font-family:Tahoma,Arial,sans-serif;
background:white;
color:black;
font-size:12px;
}
A {
color : black;
}
A.name {
color : black;
}
.line {
height: 1px;
background-color: #525D76;
border: none;
}
</style>
</head>
<body>
<h1>HTTP Status 406 - Not Acceptable</h1>
<div class="line"></div>
<p><b>type</b> Status report</p>
<p><b>message</b> <u>Not Acceptable</u></p>
<p><b>description</b> <u>The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers.</u></p>
<hr class="line">
<h3>Apache Tomcat/8.0.45</h3>
</body>
</html>
An application/xml media type is supposed to be returned!
Here is the screen shot of my swagger after calling the api
Here is the response when calling the service directly from the browser
I have also changed the response media type to application/json but it still did'nt worked too.
Can someone please help me to fix this problem?
The issue is you have message part at the end of both endpoint and actual request. That makes the underneath call becomes
http://localhost:8080/messanger/webapi/messages/messages/
which is an invalid URL.
The solution is simple. Remove the messages part from the endpoint URL.
i.e. Endpoint URL should be http://localhost:8080/messanger/webapi/
I have an issue building my sencha touch 2 app for production, using this command: "sencha app build production". I see following issue:
C:\xampp\htdocs\eiamobile\eiamobile\i>sencha app build production
[INFO] Deploying your application to C:\xampp\htdocs\eiamobile\eiamobile\i\build\production
[INFO] Copied sdk/sencha-touch.js
[INFO] Copied app.js
[ERROR] UNKNOWN, unknown error 'C:\xampp\htdocs\eiamobile\eiamobile\i\build\production\http:'
I see the ONLY if I use external JS (google geometry) file in app.json file:
"js": [
{
"path": "sdk/sencha-touch.js"
},
{
"path": "app.js",
"bundle": true, /* Indicates that all class dependencies are concatenated into this file when build */
"update": "delta"
},
{
"path": "http://maps.google.com/maps/api/js?sensor=false&v=3&libraries=geometry",
"bundle": true, /* Indicates that all class dependencies are concatenated into this file when build */
"update": "delta"
}
]
ANY help will be appreciated
EDIT:
Adding my index.html file
<html manifest="" lang="en-US">
<head>
<meta charset="UTF-8">
<title>eia-sencha</title>
<style type="text/css">
/**
* Example of an initial loading indicator.
* It is recommended to keep this as minimal as possible to provide instant feedback
* while other resources are still being loaded for the first time
*/
html, body {
height: 100%;
background-color: #1985D0
}
#appLoadingIndicator {
position: absolute;
top: 50%;
margin-top: -15px;
text-align: center;
width: 100%;
height: 30px;
-webkit-animation-name: appLoadingIndicator;
-webkit-animation-duration: 0.5s;
-webkit-animation-iteration-count: infinite;
-webkit-animation-direction: linear;
}
#appLoadingIndicator > * {
background-color: #FFFFFF;
display: inline-block;
height: 30px;
-webkit-border-radius: 15px;
margin: 0 5px;
width: 30px;
opacity: 0.8;
}
#-webkit-keyframes appLoadingIndicator{
0% {
opacity: 0.8
}
50% {
opacity: 0
}
100% {
opacity: 0.8
}
}
</style>
<!-- The line below must be kept intact for Sencha Command to build your application -->
<script id="microloader" type="text/javascript" src="sdk/microloader/development.js"></script>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false&v=3&libraries=geometry"></script>
</head>
<body>
<div id="appLoadingIndicator">
<div></div>
<div></div>
<div></div>
</div>
</body>
</html>
Try to add "remote": true in app.json
http://mitchellsimoens.com/2012/07/sencha-touch-2/going-remote-with-sencha-command/
From Sencha Touch documentation
To use this component you must include an additional JavaScript file from Google:
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script>
So, I guess you could try to load the API this way, which is actually how they do it in the map example that comes with the framework.
Also if google is undefined when your app starts, I guess you can load GM API asynchronously :
http://www.senchafiddle.com/#MhAME
Hope this helps