Can I check the type of device Internet connection?

andrecaribe

How to know if the device is connected to the Internet? Using Application:canOpenUrl(url)?
And what kind of connection? WiFi, 4G, 3G ...

ar2rsawseen

Currently no, and it seems checking that requires platform specific code, thus you would need to create a plugin to do that

OZApps

@andrecaribe, the easiest way to check if you are connected is to try to access google.com or a website that is available via an internet connection using sockets or UrlLoader.

phongtt

Yep, at Guava7 we use that technique like @OZApps said.

andrecaribe

Ty for response.

OZApps

@andecaribe, to answer the second part of your question, determining the connection type, it can be done only on the iOS platform (for the moment) as Apple have a reachability API only for the iOS, so you cannot use that on other platforms. In case you were still looking for an answer to that question.

Mells

@phongtt
could you give a sample code of how you check it the internet connection is active please?
While offline, I have tried using :

local loader = UrlLoader.new("www.google.com") print (loader)

I was expecting loader to be nil to check if it's available or not but it seems not to be the case.
How do you deal with that? Or maybe @OZApps I know that you always come up with great suggestions.

Edit :
Also tried this : UrlLoaderEvent.ERROR :

loader:addEventListener(Event.ERROR, function() print ("/// ERROR ///") end)

but the event was not dispatched.

ianchia

The httpStatusCode will be a 503 ("Service unavailable") after a LOOONG timeout for UrlLoader if there is no connection. Personally, I try to load a known URL (using HTTP GET) and set a timer for it. If there's no response within my personal timeout limit, then I put up an alert to the user saying there's no internet connection.

@OZApps is right for iOS - if you are trying to determine the "type" of connection you have, "Reachability" is the way. See modern variants such as:

https://github.com/kstenerud/KSReachability
https://github.com/tonymillion/Reachability

Hope this helps,

- Ian

ianchia

@Mells …. Here's a bit of sample code grabbed from one of my network unit test libs.

Best,

- Ian.

function network_manager:get_system_status(callback)   self.callback = callback;   local loader = UrlLoader.new(); loader.in_progress = false;   local function onComplete(event)   -- cancel timeout loader.timeout:reset(); loader.in_progress = false;   print (event.httpStatusCode); print (event.data); callback(); end     local function onError(event) print("error") loader.in_progress = false; end   local function onProgress(event) loader.in_progress = true; local percent_loaded = math.floor( event.bytesLoaded / event.bytesTotal *100); print("-----------------------------------------"..percent_loaded); end   loader:addEventListener(Event.COMPLETE, onComplete) loader:addEventListener(Event.ERROR, onError) loader:addEventListener(Event.PROGRESS, onProgress)   loader:load(self.URLs.system_status , UrlLoader.GET ); loader.in_progress = true; print("loading initiated");   local function onTimerProgress(e) print("timeout progress _________________" ) print("loader timeout in progress"..os.timer() ); end   local function onTimeOut(e) if ( loader.in_progress ) then loader:close(); end network_manager:show_network_error_msg(); end   -- attempt a system status check for 20 sec. -- Since it's a 2 byte file, if we fail on this, we have serious network problems. loader.timeout = Timer.new(self.timeOutSmallInterval,20); loader.timeout:addEventListener(Event.TIMER,onTimerProgress); loader.timeout:addEventListener(Event.TIMER_COMPLETE,onTimeOut); loader.timeout:start();   print("timer started"); end

Mells

@ianchia
thanks a lot.

I was wondering what the purpose of "Application:canOpenUrl" was, though.
It does seem to return "true" even if the connection is not available.
@ar2rsawseen is canOpenUrl checking if the url is well formed only?

I assumed it was checking both (well formed url + available connection), wouldn't it actually make things easier if that was the case? Or maybe I am missing the other part of the iceberg

ar2rsawseen

@Mells Application:canOpenUrl checks if the protocol or custom URI scheme is supported by the OS

ianchia

Hi @Mells

I think you're misunderstanding what a URL is. It has nothing to do with whether you're connected online and is actually designed to be a way to reach a resource - hence it's name: "Uniform Resource Locator" (see http://en.wikipedia.org/wiki/Uniform_resource_locator for a pretty good laymen's explanation compared to the RFCs.)

On iOS, there are a few standard URL schemes (or protocols) that don't assume a connection. Consider: mailto:foo@bar.com - even if the device isn't online, Mail.app still opens with a blank mail populated with the address foo@bar.com in the To: field. Similarly, http or https opens Safari, tel: opens the Phone app, etc.

There are literally thousands of custom URL schemes (the first bit of the URL) that allow interconnectivity between apps. Here's a database that people have volunteered information for (for iOS only): http://handleopenurl.com

Apple's iOS docs on openURL:

https://developer.apple.com/library/ios/documentation/uikit/reference/UIApplicationDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UIApplicationDelegate/application:openURL:sourceApplication:annotation:

Intro to iOS URL scheme:
https://developer.apple.com/library/ios/featuredarticles/iPhoneURLScheme_Reference/Introduction/Introduction.html#//apple_ref/doc/uid/TP40007899

So for example, if you register a custom URL scheme on iOS with your app, and someone receives an email with a link inside the email like:

theWindApp://abc/?a=1&b=2

If they click on the link in the email AND your app is installed on their iOS device, it would launch and open to the appropriate resource (eg. a specific page in an ebook app that triggers a specific animation, or a bonus reward sent from one user to another etc.)

Does that make more sense about opening URLs now?

- Ian

hgvyas123

very good info ^:)^

Mells

@ianchia
Thanks a lot, great answer.
I have been using launch center pro + drafts + editorial for months, but didn't make the connection with it used in Gideros.

phongtt

Anyway, @ianchia has a great answer

Mells

I love this community
@phongtt thanks for searching!
@ianchia I am planning to do some dev this night after work, your code will help me save a lot of time, thanks again.