In my winrt app, I am trying to update the live tile based on polled URIs. There is currently no update happening and I can't figure out how to troubleshoot. There are numerous scenarios that could be breaking things but i can't seem to find anyway to get insight into potential errors.
The TileUpdateManager seems to be a bit of a black hole that absorbs information but never lets it out.
Does anyone know of how to view errors from the TileUpdateManager?
If it interests anyone, here is my update code:
TileUpdateManager.CreateTileUpdaterForApplication().EnableNotificationQueue(true);
PeriodicUpdateRecurrence recurrence = PeriodicUpdateRecurrence.HalfHour;
List<Uri> urisToPoll = new List<Uri>();
urisToPoll.Add(new Uri(#"http://livetileservice2012.azurewebsites.net/api/liveupdate/1"));
urisToPoll.Add(new Uri(#"http://livetileservice2012.azurewebsites.net/api/liveupdate/2"));
TileUpdateManager.CreateTileUpdaterForApplication().StartPeriodicUpdateBatch(urisToPoll, recurrence);
To expand on Nathan's comment, here are two steps you can take to troubleshoot:
Enter your URI straight into a browser to see the results that are returned, and inspect them for being proper XML. As Nathan points out, your URIs are returning JSON which will be ignored by the tile update manager. As a working example (that I use in Chapter 13 of my HTML/JS book), try http://programmingwin8-js-ch13-hellotiles.azurewebsites.net/Default.cshtml.
If you feel that your URI is returning proper XML, try it in the Push and Periodic Notifications Sample (Scenarios 4 and 5 for tiles and badges). If this works, then the error would be in your app code and not in the service.
Do note that StartPeriodicUpdate[Batch] will send a request to the service right away, rather than waiting for the first interval to pass.
Also, if you think that you might have a problem with the service, it's possible to step through its code using Visual Studio Express for Web running on the localhost, when the app is also running inside Visual Studio Express for Win8 (where localhost is enabled).
.Kraig
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Looking at the MDN documentation IOS/Safari fully supports ServiceWorkerGlobalScope.onfetch but when you look at the FetchEvent specification it says it is not supported at all by Safari.
In particular, I would like to store some state for each client and was hoping to use the fetchEvent.clientId property of the event to index it. Of course I presume I also have access to the fetchEvent.request object otherwise I can't see how a service worker can do anything useful and I could simulate clientID from a passed in parameter in the url. But the docs don't really tell me what IOS/Safari supports and doesn't so I don't know which way to go.
Can someone please tell me precisely what does IOS/Safari pass when it calls the defined onfetch function.
I found the answer to my question by using https://jakearchibald.github.io/isserviceworkerready/demos/fetchevent/
connecting my iPad to my Macbook and debugging my iPad. I was eventually able to open the web inspector for the Service worker for that page, and the console.log showed the event passed in.
FetchEvent.clientID is present but a zero length string. As it happens I did the same thing on my (linux) Desktop using Chrome and its also a zero length string, BUT it has another parameter resultingClientId with what looks like a UUID in it. That parameter is not there in Safari.
The FetchEvent.request is there, and in particular the URL. So I can generate my own client id in the client (I am using Date.now().toString() as that is good enough for my purposes) for use in the service worker. In fact my site without a service worker was using the in the URLs I need to intercept already, so I am happy that I have a solution.
I'm trying to get the Watson Visual Recognition to run client side by using express-browserify with reference to the node-sdk for watson-developer-cloud. The VisualRecognitionV3 makes use of the fs package hence I get the fs.existsSync error when I'm trying to call it from the client-side as the browser doesn't know which filesystem to use. My question is how do I go about creating a so called 'abstraction layer' as I am restricted to using the express-browserify package for cross origin calls.
This thread is pretty helpful in shedding some light but I'm not sure where to start regarding the 'abstraction layer' or if there are any other solutions. Also, would something like socket.io work for this? I've linked a clone of the directory here as it seems less clunky than pasting the multiple portions below.
The repository can be cloned and just requires a personal iam_apikey with relevant launch configuration. Appreciate any pointers. Thanks!
I didn't manage to sort this out with express-browserify due to the require(fs) from browser issue but I was able to get it running using the express-ws package
Currently i'm working on a security monitoring app that continuously monitor new processes created.
For that im using wim and event watcher, witch works fine in VB.NET.
But there are 2 features that im missing.
I need to monitor process API calls, and I've been searching the web like mad, and come up empty.
Basically i need to monitor process WaitForSingleObject, LoadLibraryA, CreateProcessW and WriteProcessMemory. And registry access/changes as well.
Im hoping this can be done without a system wide hook, but form what i can find, it cannot be done via WMI.
So the question is, how to, and what can i do with managed code.
I'm gonna focus on the second point as i don't have experience on your first.
For checking if a process is signed i am using the sigcheck.exe from Mark Russinovich, because of the various methods it uses to verify files. Some are catalogsigned, some have the key embedded, there is iirc another weird method. There is no easy way to do it yourself. Had weird false detections with trying self-built methods to cover all possibilities. Hope that info helps
Worklight 6.1 on both Windows (colleague) and Mac (me), building an a Hybrid app destined for Android device but to speed up development we do initial testing as Mobile Web App in Chrome browser on desktop.
We get a weird symptom that I'm trying to fine-down to a reproducible test case. I think I see different behaviours when stepping in debugger and just letting it run. Want to check whether a certain coding pattern could be the cause of the symptom before I go any further.
Fundamental question: should we wait for the resolution of a promise returned by a JSONSTore request for an action on a collection before issuing another request? more explanation below.
The overall intent is to load some data into the JSONStore, with some intelligent replace/merge action if a record is already present. Pseudo code:
for each record retrieved from back-end
if ( record already present in Store )
do some data merging
replace record
else
add record
The application code actually works like this, just considering the add() case, the problem manifests when the store is empty, all records need to be added
for each record to add
addPromise = store.get().add(record);
listOfPromises.insert(addPromise);
examine the list of promises recording any errors
That is there is no "wait" for add to finish before issuing the next add request. Hence in effect we've initiated a set of adds "in parallel" whatever that might mean in JavaScript in Chrome.
The code appears to run just fine, no errors reported. On android device it works reliably. In Chrome under normal running (no stepping in debugger) we end up with no reported errors but only one record inserted - indeed as though a snapshot of the initial "empty" store had been taken and each add is working on that "empty" copy.
After writing this I'm now pretty convinced that the coding pattern described above is vulnerable to a kind of race and that the better approach is build a list of documents to be added and insert them in a single operation.
A more detailed answer will be coming later, but I now know that this
the coding pattern described above is vulnerable to a kind of race and
that the better approach is build a list of documents to be added and
insert them in a single operation.
is true. In the browser the JSONStore does require that we wait for the result of one request before issuing another one. The recommended approach is
var dataToAdd = buildArrayOfDataToAdd(responseFromServer);
var dataToReplace = buildArrayOfDataToReplace(responseFromServer);
jsonstore.add( dataToAdd ).then( function() { jsonstore.replace( dataToReplace); })
I have ASP.NET MVC 4. Just recently I upgraded to .NET Framework 4.5, VS 2012, and I believe it also upgraded IIS express to version 8.
Now that I upgraded, my application looses POST data. In one of my WCF components I look into HttpContext.Current.Request.Form -- it now gives me 0 fields, while I expect 4 fields. For troubleshooting, I added HttpModule with an empty body, and if I break on BeginRequest, I consistently can see all my form fields in HttpContext.Current.Request.Form from HttpModule, but when I hit F5, I sometimes get the Form fields in the component and sometimes the Forms objects is empty.
Sounds like some kind of race condition inside of ASP.NET, MVC or something.
I am at a loss.
I suggest you inspect you POST with an HTTP sniffer such as Fiddler and see if the post is being sent correctly.
Sometimes you are sending the POST with an incorrect encoding and it might also cause you issues like that.
If after inspecting the POST with Fiddler and making sure you are using the correct encoding you still can´t find what's wrong I suggest you create a small piece of code that reproduces the error so we can better help you.