How to get raw notification in background - windows-phone-8

How does messenger like whats app is saving data when WhatsApp is not running? Suppose a scenario: a message is received by the user but at that time he/she didn't act upon. A few minutes Later he/she got disconnected from the internet then opens the messenger.
He/She find his/her message saved in their whats app even the user didn't respond to that notification neither the app contacted the server as when opening the app there is no internet connection.
Then how the above scenario became possible??

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Chrome Extension - send post request at certain time using external server

I am currently building a Chrome extension that lets users auto-register for courses on a particular website once registration opens. The registration process is just a simple fetch POST request with an authentication header.
Now, this already works using the chrome.alarms API while the browser is open, but for obvious reasons I would want this to also work once the user closes the browser. Do you have any ideas how to do this? I really want to avoid to externally save user data..
If this is impossible, my idea would be to send the registration fetch to an external server (maybe even one hosted on a Raspberry Pi? Other ideas?) and then execute it once the registration opens.

Tracking user/client activity in react and .net web app

I am trying to track all CRUD activities on my web app. I am using React and .NET with MySql. Idea is that if someone edits let's say client data (phone number, address, etc...), I want to have something like an activity log where I will see WHO edited that client and WHAT he edit.
Let's say You are an admin, and you go to list off all clients, then U click on one and get redirected to the preview page of that client. On the bottom, you will see the activity log.

Can a Gmail addon detect when it is loaded for the first time after browser open?

I'm researching for the possible development of a Gmail addon.
I will need to be able to check if a user is logged in to our service before sending API calls to retrieve data. We can ping the service which will respond with a 200 if the token is valid. If it is not valid we need to prompt them to login.
I figure we ping the server when the browser first starts and loads the Gmail addon. Is that possible?
Cheers
I haven't tried anything because I don't know where to look!

Automatically sending text messages from an online form

Good Afternoon all,
I've hit a major rock at the moment in developing my e form. Just to give you a brief I've designed a e form for delivery drivers to scan barcodes of items and get receipients to sign off deliveries out in the field.
I currently have the option to navigate using the using
I have the function at the moment to send sms which is < a href:"sms+44111111;?&body=Hi">Send Message works perfectly, however, I want to send the message without the user opening the messages on the android phone.So once they click send message, it essentially does, without viewing it prior? Is this just an add on to this code? I can't seem to find any answers on the web?
Any help on this matter is much appreciated
Software, that can send text messages (SMS) without allowing the user to review and potentially cancel them is malware. I assume, this is not what you want to develop.
The usual options are:
Send the message from the server via a suitabe SMS gateway (either a commercial API or roll your own)
Allow the user to review and potentially cancel the SMS (i.e. make it non-mission-critical)

Facebook Graph API logout doesn't work

Using the Facebook Actionscript Graph API to upload videos to a user's facebook page
http://code.google.com/p/facebook-actionscript-api/
When first logging in after a user has entered their name and password, a 2nd modal appears asking permission to post to the user's friends pages.
The problem is, if the user hits cancel, the application in effect becomes broken because they remain logged in and the next user will be presented with the same 2nd privacy modal and NOT the first username password modal.
I tried calling logout
FacebookDesktop.logout(callback, <APP-ORIGIN_URL>)
but that doesn't seem to log the user out right away. The user session seems to be stored on the server as well since I cannot locate any LSO's (Flash cookies)
Can anyone help?