Is there any way to monitor the loading of the crossdomain.xml file?
I'd like report the load times of this file, since it seems to be intermittently taking longer than expected. There doesn't seem to be an event from URLLoader and Security.loadPolicyFile() doesn't allow any event listeners.
How can I get the load time for a crossdomain.xml file without requiring additional loads of the file?
When I ran into issues with crossdomain.xml, I read some basic stuff about what it was and how you can work with it. This is a "heavily simplified/not entirely true version of it" but it might serve as a guideline.
Crossdomain.xml-loading is owned by 'browser/flash initialization' and tells browser if 'any code' should be allowed to execute or not. Hence you can't really measure it since it's loaded prior to your code and in another environment.
There might be some way of finding it, it might have changed since I last tried to do that several years ago... but...
You can always measure it in another way, last app I used to troubleshoot issues in this area was Charles Web Debugging Proxy.
Related
I was wondering if anybody could direct me to any tools for debugging the cache.manifest file in offline HTML5 access. I recently downloaded a program called Manifesto which allows me to look up the cache manifest on loading a page. Everything seems to working fine however it keeps on saying that the status is "uncached". Obviously, it seems like although it is checking to make sure the cache files are there, it isn't actually caching them upon load. Whats going on and more importantly, how do I figure out how to solve it?
I got it to work. To be honest, it might have been working before but because I was having some different php scripts running in the background I had to be a little careful with pulling it up.
A web page is not loading/hanging. How will you debug it?
I have been asked this question couple of times during my telephonic interviews. But I don't know the perfect answer.
I had given answers such as checking if the web-app is deployed properly, the internet itself might be slow, the JSP might have some errors, checking logs for any such detail, etc. But interviewer kept asking "These are all good checks, but what if all of these are fine, what else might be wrong?"
Also, it is not a JavaScript specific question. I can debug the JS/jQuery code using debugger, or following the console.log(). But how will you debug a plain JSP page?
Can any web-application gurus at SO help?
Once you know that you can't simply get to your site in the expected way (what I call the Hail Mary Test), then you need to start from the inside out.
Because of the multiple failure points a website can have, I always create a command line environment that allows me to test the framework & DB operation independently of the web server, firewall settings, etc. This can take some fiddling depending on what you are using, but I've done this successfully with Django, WordPress, Drupal, etc.
Once I know the app itself is working, I connect with a command line client (e.g. links) to see if a client coming from localhost works as expected. This confirms that the server itself is working (at least partially). Then I test from another host on the same LAN. More than once I've seen localhost work and LAN access not work, and the problem is almost always server configuration or firewall configuration.
If all of that works, but you still can't get to your site from the internet, then it is a networking / firewall setting somewhere further up the food chain. Try to find a host that is one step farther up from where you last succeeded and test that. Lather, rinse, repeat.
I'm encountering an issue that Selenium IDE seems not to record a specific event on a real webserver.
However, if I save the page (including all resources) via firefox entirely to disk, open the saved file in the browser and try to record the same issue, Selenium IDE now works correctly and records the event as expected.
I'm not sure what is causing this behavior - maybe some race conditions inside Selenium IDE exists (latencies from a real webserver are higher than on a local file URL), or maybe it has something to do with URLs - but these are only quick guesses.
Does anybody have some suggestions/best practices how to track down such kind of Selenium IDE issues?
UPDATE:
I figured out my root issue, only with trial and error, but with succeess. I filed a bug at the selemium project.
The reason why it locally worked was a file not found after form submit which not happened at the serverside. It seems that the file not found error strangely prevented the bug from occuring.
However, the main part of this question isn't really answered yet, next time I still do not know how to quickly track down such issues. So for now, I'll keep it open.
I have similar issue. The Selenium IDE does not record anything from this website "http://suppliers.inwk.com". You may not have credentials to get login access, but if you can get the login page itself recorded in Selenum IDE, then I think we can come to the root cause, or atleast get a clue.
I have an HTML5/jquery mobile web app at http://app.bluedot.mobi. It is used for long distance races to track competitors via SPOT satellite tracking. The issue I have not yet resolved is that when loading the app when no data connection exists, the browser throws a "no data connection" alert popup as it is attempting to fetch the manifest during the checking event. Even when a data connection is present, loading the app can take a very long time. There are ~ 500 files to check. The fastest way to load the app (from a phone) is to be in airplane mode and dismiss the browser's alert - not so elegant.
Rather than force an update on users who tend to be in the backcountry with a spotty connection, I want to use applicationCache.update() programmatically, giving the user control over the process and speeding up app load whether on or offline.
Is this currently possible with the HTML5 spec and respective browser implementations?
Sounds like you need the abort() method. Unfortunately it is very new, and it will probably be a while before it is implemented by the majority of mobile browsers.
There are ~ 500 files to check.
It sounds like you're implying that the browser checks each file to see if there's any of them which has changed. This is not correct. The browser only checks the manifest file if that has changed, and that is a simple byte check. If the manifest file has not changed, the browser believes nothing has changed.
So if your application is slow to start, it might be your because your application is complex and there's alot of HTML and Javascript to parse. I would advise you to take a look at the application and see if there's anything you can optimize. In that case, you might want to take a look at Yahoo's Best Practices for Speeding Up Your Web Site page.
For example, I noticed you have a lot of Javascript code in the HEAD section. The beforementioned article advices us to move all Javascript (To the extent of what's possible) to the bottom of the page, so that the browser can start rendering the page as soon as possible. And there's a lot of other sound advice in the article. So take a look, I'm sure you'll find it useful. :-)
I'm writing a flash app using the open source tools. I would like to load a data file in to the app and capture a screenshot of the stage on the server. The only part that seems mysterious is running the app on the server. In fact, I don't even care if it's the same app running on the server and in the browser--if I can use the flash stage and drawing routines to produce an image server-side, I'm happy. If I have to delve in to flex, fine. Right now I'm having problems finding any starting point at all.
I gather Adobe has some commercial products that may fit the bill, but I'd like to stick with open source, apache, and linux. I know this is probably possible with haxe/neko, but I'd like to use more mainstream tools if possible. Am I asking too much?
EDIT/CLARIFICATION: Many thanks for the responses so far, but I think I've been a bit muddy in my description. I've already written the actual stage-grabbing stuff using the same PNGEncoder class as was suggested. The problem is in actually running the swf on the server side. I don't want to let the client take the screen shot itself, because this opens up the possibility of the client maliciously submitting a screenshot which does not correspond to what is on the stage, that is, I don't want users uploading porn. If I could run the the actionscript code on the server, then I could generate the screenshot from my data files and be sure that the screenshot matches the data, but I have no idea how to run the actionscript or swf on the server.
Swfs run on a client computer, not on the server. The only way it would run on the server would be if you set up a special environment on your server so that it ran a web browser, opened up the page and ran the swf. But even then it would have no correlation to what an external user was doing.
You'll need to run it client side. As far as your security concerns, the best way to get rid of those is to have the php writing the actual image only accept an encrypted form of the image file, which the flash can encrypt. That way they can't simply use the PHP file to upload whatever image they want unless they happened to encrypt it the exact same that your swf did. Next encrypt the swf itself (I recommend SWF Shield) so that a potential hacker cannot read the code to know how to encrypt the image.
We just completed a similar project where we rendered JPGs from SWFs that loaded dynamic data, we used IECapt
Did you try actionscript print commands?
Try and look at this:
http://www.phpclasses.org/browse/package/4312.html
I know this question is long dead, but I had a similar problem and ended up writing a script using applescript + ui scripting to grab the inside area of the preview window of the standalone flash player in OS X. You can grab it off github here.
How about swfdec-thumbnailer from the swfdec-gnome package? It's used to create thumbnails of SWF files but can accept arbitrarily large resolutions with the -s argument.
EDIT: swfdec-gnome has been deprecated in Ubuntu 10.10 in favour of Gnash. Here is a guide on taking screenshots with Gnash (note that certain features like gradients are not yet properly supported).