So I have this web-app using angularJS and nodeJS. I don't want to just use localhost to demo my project because it doesn't looks cool at all when I type "node server.js" and then go to localhost.....
Since I intend to use Firebase for the data, I have noticed that Firebase provides hosting. I tried it, but it seems to only host the index.html and not through/using server.js. I have customized files for the server to use/update. So, how can I tell Firebase Hosting to use my server and related files when hosting?
Is it possible to tell Firebase, hey, run "node server.js" to host my index.html?
I'm guessing by the way you are wording the question you want to see this site from "the internet".
Two routes you could go here.
a) Serve your index through Firebase hosting. Firebase only hosts assets. If your Angular app is being served through Node then you will need to change your architecture to be more SPA-ish
SPA-ish would be like an index bootstrap that interacts with the backend purely through API's.
You would host the API server on something more appropriate like through Nodejitsu.
b) Serve the whole thing through something like Nodejitsu (hosting platform) or your very own VM managed by a different kind of hosting company like BuyVM.net.
Another idea, is if your nodejs app is independent of the angularjs app (however they use shared data, and perform operations on that data model) you could separate the two and connect them only via firebase.
Firebase hosting -> index.html and necessary angularjs files.
Locally (your PC) -> server.js which just connects to firebase and trigger on changed data.
I have done this for a few projects and it's a handy way to access the outside world (internet) while maintaining some semblence of security by not opening ports blindly.
I was able to do this to control a chromecast at my house while at a friends house
Here's an example from my most recent project (I'm trying to make a DVR).
https://github.com/onaclov2000/webdvr/blob/master/app.js
var FB_URL = '';
var Firebase = require('firebase');
var os = require('os')
var myRootRef = new Firebase(FB_URL);
var interfaces = os.networkInterfaces();
var addresses = [];
for (k in interfaces) {
for (k2 in interfaces[k]) {
var address = interfaces[k][k2];
if (address.family == 'IPv4' && !address.internal) {
addresses.push(address.address)
}
}
}
// Push my IP to firebase
// Perhaps a common "devices" location would be handy
var ipRef = myRootRef.push({
"type": "local",
"ip": addresses[0]
});
myRootRef.on('child_changed', function(childSnapshot, prevChildName) {
// code to handle child data changes.
var data = childSnapshot.val();
var localref = childSnapshot.ref();
if (data["commanded"] == "new") {
console.log("New Schedule Added");
var schedule = require('node-schedule');
var date = new Date(data["year"], data["month"], data["day"], data["hh"], data["mm"], 0);
console.log(date);
var j = schedule.scheduleJob(date, function(channel, program, length){
console.log("Recording Channel " + channel + " and program " + program + " for " + length + "ms");
}.bind(null, data["channel"], data["program"], data["length"]));
localref.update({"commanded" : "waiting"});
}
});
When I change my "commanded" data at the FB_URL, to "new" (which can be accomplished by angularjs VERY Simply, using an ng-click operation for example) it'll schedule a recording for a particular date and time (not all actually functional at the moment).
I might be late but since 3 years have passed there is an solution available now from Firebase in the form of cloud functions
Its not straight forward but looks promising if one can refactor their code a bit
Related
In my React application, I am using window object , document object and localStorage.
To avoid errors, I have set it up like:
var jsdom = require("jsdom");
var doc = jsdom.jsdom("");
if (typeof localStorage === "undefined" || localStorage === null) {
var LocalStorage = require('node-localstorage').LocalStorage;
localStorage = new LocalStorage('./scratch');
global.localStorage = localStorage;
}
var win = doc.defaultView
console.log("document default viewwwwwwwwwwwwwwwwww", doc);
global.document = doc
global.window = win
function propagateToGlobal (window) {
for (let key in window) {
if (!window.hasOwnProperty(key)) continue
if (key in global) continue
global[key] = window[key]
}
}
propagateToGlobal(win)
But in my application, I want real window, ,real localStorage and real document to be used instead of what I have set up above.
localStorage created this directory scratch.Does that mean browser localStorage would not be used now?
Also, the console statement gives this if I try to console doc variable and is being used in place of document variable which is creating problem:
Document { location: [Getter/Setter] }
This is the script I have :
<script dangerouslySetInnerHTML={{__html:(function(w,d,s,l,i){
console.log(d.getElementsByTagName(s)[0]);
w[l]=w[l]||[];
w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});
var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';
j.async=false;
j.src= '//www.googletagmanager.com/gtm.js?id='+i+dl;
console.log("f is",f);
f.parentNode ? f.parentNode.insertBefore(j,f) : false;
})(window,document,'script','dataLayer','ID')}}/>
Here getElementByTagName returns undefined and not an element as it should. How do I fix this?
basically, JSDom and the such should only be used if you would like to fake the window and document of the browser inside NodeJS. This is valid when running tests. I've not seen node-localstorage before, but i suspect the same is true of this package also.
You certainly do not want any of those packages to run within your app when on the client (in the browser).
You haven't specified which errors you have but I can only guess you are trying to run your app in node?
I would recommend removing all of them from your app completely and seeing where you get the errors. Then tackle the errors one by one. To start with ensure you only run that code on the client by using componentDidMount or something similar.
Once the app is working on the client and on the server, you could then look at how to improve / increase the amount the is rendered on the server.
I'm using LokiJS to save in local storage (well, I'm trying) .
What I want to do is a ToDo app, my controller is as follows:
.controller('Dash', function($scope) {
var db = new loki('loki.json');
$scope.name="";
$scope.lname="";
var users=db.getCollection('users');
if (users==null) {
$scope.message="It's null";
var users = db.addCollection('users');
}else{
$scope.message="It's ready";
}
$scope.insert=function(namesI, lnameI){
users.insert({
name: namesI,
lname:lnameI
});
}
The issue is that everytime that I test it, the message is "It's null". Although before already I have inserted data. I mean, everytime I launch the app, the database is created.
How I can persist the data?
*I'm not using any cordova plugin.
You are not providing a loadHandler function, so you are trying to access collections before Loki is finished loading the json file. Look at this example for a clarification on how to use the autoLoadHandler.
Also bear in mind that at some stage you need to call db.saveDatabase() to persist, or else you need to provide an autoSaveInterval value when instantiating Loki.
In the dev environment for my React app, I have a set of public/private keys that I need to access an API. I'd like to ideally put these keys into their own file for gitignore purposes, but i'm not having luck with my code as shown below.
my helpers.jsx file is where the API data is called via lightweight AJAX add-on, and I have the actual keys in the require declarations area:
var API_KEY = require('./keys.jsx');
var PRIV_KEY = require('./keys.jsx');
Summarily, my keys.jsx file (stored in the same subfolder as the helpers.jsx) consists of the following:
module.exports = {
API_KEY:'myactualpublickey',
PRIV_KEY:'myactualprivatekey'
};
However, my app does not like this set up, as I get an "Failed to load resource: the server responded with a status of 401 (Unauthorized)” error message and the API call isn't successful because the necessary keys are not included.
When I replace the require('./keys.jsx'); in the helpers.jsx file with the actual keys, the API call works fine.
Any help or guidance would be most appreciated. Thanks.
You're exporting an object with properties called API_KEY and PRIV_KEY, so try this:
var API_KEY = require('./keys.jsx').API_KEY;
var PRIV_KEY = require('./keys.jsx').PRIV_KEY;
I am new to SEO and just want to get the idea about how it works for Single Page Application with dynamic content.
In my case, I have a single page application (powered by AngularJS, using router to show different state) that provides some location-based search functionalities, similar to Zillow, Redfin, or Yelp. On mt site, user can type in a location name, and the site will return some results based on the location.
I am trying to figure out a way to make it work well with Google. For example, if I type in "Apartment San Francisco" in Google, the results will be:
And when user click on these links, the sites will display the correct result. I am thinking about having similar SEO like these for my site.
The question is, the page content is purely depending on user's query. User can search by city name, state name, zip code, etc, to show different results, and it's not possible to put them all into sitemap. How google can crawl the content for these kind of dynamic page results?
I don't have experience with SEO and not sure how to do it for my site. Please share some experience or pointers to help me get started. Thanks a lot!
===========
Follow up question:
I saw Googlebot can now run Javascript. I want to understand a bit more of this. When a specific url of my SPA app is opened, it will do some network query (XHR request) for a few seconds and then the page content will be displayed. In this case, will GoogleBot wait for the http response?
I saw some tutorial says we need to prepare static html specifically for Search Engines. If I only want to deal with Google, does it mean I don't have to serve static html anymore because Google can run Javascript?
Thanks again.
If a search engine should come across your JavaScript application then we have the permission to redirect the search engine to another URL that serves the fully rendered version of the page.
For this job
You can either use this tool by Thomas Davis available on github
SEOSERVER
Or
you can use the code below which does the same job as above this code is also available here
Implementation using Phantom.js
We can setup a node.js server that given a URL, it will fully render the page content. Then we will redirect bots to this server to retrieve the correct content.
We will need to install node.js and phantom.js onto a box. Then start up this server below. There are two files, one which is the web server and the other is a phantomjs script that renders the page.
// web.js
// Express is our web server that can handle request
var express = require('express');
var app = express();
var getContent = function(url, callback) {
var content = '';
// Here we spawn a phantom.js process, the first element of the
// array is our phantomjs script and the second element is our url
var phantom = require('child_process').spawn('phantomjs',['phantom-server.js', url]);
phantom.stdout.setEncoding('utf8');
// Our phantom.js script is simply logging the output and
// we access it here through stdout
phantom.stdout.on('data', function(data) {
content += data.toString();
});
phantom.on('exit', function(code) {
if (code !== 0) {
console.log('We have an error');
} else {
// once our phantom.js script exits, let's call out call back
// which outputs the contents to the page
callback(content);
}
});
};
var respond = function (req, res) {
// Because we use [P] in htaccess we have access to this header
url = 'http://' + req.headers['x-forwarded-host'] + req.params[0];
getContent(url, function (content) {
res.send(content);
});
}
app.get(/(.*)/, respond);
app.listen(3000);
The script below is phantom-server.js and will be in charge of fully rendering the content. We don't return the content until the page is fully rendered. We hook into the resources listener to do this.
var page = require('webpage').create();
var system = require('system');
var lastReceived = new Date().getTime();
var requestCount = 0;
var responseCount = 0;
var requestIds = [];
var startTime = new Date().getTime();
page.onResourceReceived = function (response) {
if(requestIds.indexOf(response.id) !== -1) {
lastReceived = new Date().getTime();
responseCount++;
requestIds[requestIds.indexOf(response.id)] = null;
}
};
page.onResourceRequested = function (request) {
if(requestIds.indexOf(request.id) === -1) {
requestIds.push(request.id);
requestCount++;
}
};
// Open the page
page.open(system.args[1], function () {});
var checkComplete = function () {
// We don't allow it to take longer than 5 seconds but
// don't return until all requests are finished
if((new Date().getTime() - lastReceived > 300 && requestCount === responseCount) || new Date().getTime() - startTime > 5000) {
clearInterval(checkCompleteInterval);
console.log(page.content);
phantom.exit();
}
}
// Let us check to see if the page is finished rendering
var checkCompleteInterval = setInterval(checkComplete, 1);
Once we have this server up and running we just redirect bots to the server in our client's web server configuration.
Redirecting bots
If you are using apache we can edit out .htaccess such that Google requests are proxied to our middle man phantom.js server.
RewriteEngine on
RewriteCond %{QUERY_STRING} ^_escaped_fragment_=(.*)$
RewriteRule (.*) http://webserver:3000/%1? [P]
We could also include other RewriteCond, such as user agent to redirect other search engines we wish to be indexed on.
Though Google won't use _escaped_fragment_ unless we tell it to by either including a meta tag; <meta name="fragment" content="!">or using #! URLs in our links.
You will most likely have to use both.
This has been tested with Google Webmasters fetch tool. Make sure you include #! on your URLs when using the fetch tool.
I am new to dart and I have been trying to figure out how to use the googleapis library to update a calendars events, then display the calendar/events on a webpage.
So far I have this code that I was hoping would just change the #text id's text to a list of events from the selected calendars ID:
import 'dart:html';
import 'package:googleapis/calendar/v3.dart';
import 'package:googleapis_auth/auth_io.dart';
final _credentials = new ServiceAccountCredentials.fromJson(r'''
{
"private_key_id": "myprivatekeyid",
"private_key": "myprivatekey",
"client_email": "myclientemail",
"client_id": "myclientid",
"type": "service_account"
}
''');
const _SCOPES = const [CalendarApi.CalendarScope];
void main() {
clientViaServiceAccount(_credentials, _SCOPES).then((http_client) {
var calendar = new CalendarApi(http_client);
String adminPanelCalendarId = 'mycalendarID';
var event = calendar.events;
var events = event.list(adminPanelCalendarId);
events.then((showEvents) {
querySelector("#text2").text = showEvents.toString();
});
});
}
But nothing displays on the webpage. I think I am misunderstanding how to use client-side and server-side code in dart... Do I break up the file into multiple files? How would I go about updating a calendar and displaying it on a web page with dart?
I'm familiar with the browser package, but this is the first time I have written anything with server-side libraries(googleapis uses dart:io so I assume it's server-side? I cannot run the code in dartium).
If anybody could point me in the right direction, or provide an example as to how this could be accomplished, I would really appreciate it!
What you might be looking for is the hybrid flow. This produces two items
access credentials (for client side API access)
authorization code (for server side API access using the user credentials)
From the documentation:
Use case: A web application might want to get consent for accessing data on behalf of a user. The client part is a dynamic webapp which wants to open a popup which asks the user for consent. The webapp might want to use the credentials to make API calls, but the server may want to have offline access to user data as well.
The page Google+ Sign-In for server-side apps describes how this flow works.
Using the following code you can display the events of a calendar associated with the logged account. In this example i used createImplicitBrowserFlow ( see the documentation at https://pub.dartlang.org/packages/googleapis_auth ) with id and key from Google Cloud Console Project.
import 'dart:html';
import 'package:googleapis/calendar/v3.dart';
import 'package:googleapis_auth/auth_browser.dart' as auth;
var id = new auth.ClientId("<yourID>", "<yourKey>");
var scopes = [CalendarApi.CalendarScope];
void main() {
auth.createImplicitBrowserFlow(id, scopes).then((auth.BrowserOAuth2Flow flow) {
flow.clientViaUserConsent().then((auth.AuthClient client) {
var calendar = new CalendarApi(client);
String adminPanelCalendarId = 'primary';
var event = calendar.events;
var events = event.list(adminPanelCalendarId);
events.then((showEvents) {
showEvents.items.forEach((Event ev) { print(ev.summary); });
querySelector("#text2").text = showEvents.toString();
});
client.close();
flow.close();
});
});
}