Anyone have experience with tools that can capture web traffic and create scriptable "objects" to recreate this traffic? The objects could then be used to create scripts to drive functional or load tests. For the capture itself, a lot of tools take the proxy approach (soapUI, grinder etc.), but what we need is a transparent proxy, because some components are not able to use a proxy. Seems like soapUI has the TCP tunnel option, which is transparent, but they don't create independent, scriptable objects for traffic regeneration.
Any ideas?
There is a Microsoft web proxy that allows you to record and playback web traffic, called fiddler. See here for some of the advanced features.
Here is the fiddler blog, and some more info on the export capabilities.
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I read "Those who would like to enjoy the binding, presentation model structuring, testing capabilities, toolkit independence, and all the other benefits of OpenDolphin, but prefer REST (or other) remoting for data access, can use OpenDolphin with the in-memory configuration"
But I could not find any further hints in the docs?
I can't rely on sticky sessions in my load balanced webserver.
Therefore I need to plugin something different for the http session state.
Is there a opendolphin config property prepared for this? If not are there any plugin points available?
since OpenDolphin and Dolphin Platform use the remote presentation model pattern to synchronize presentation models between client and server you need a state on the server. Currently this state is defined in the session. As you said it's no problem to use load balancing with sticky sessions to provide several server instances. If you need dynamic updates between the clients a distributed event bus like hazelcast will help.
Therefore I need to plugin something different for the http session
state.
What do you need? With the last version (0.8.6) of Dolphin Platform you can access the http client in the client API and provide custom headers or cookies. Will this help? Can you please tell us what you need or open an issue at the Dolphin Platform github repo?
We're investigating porting a fat-client .NET application to be an HTML5-based webapp, but a hangup is that we interface with a variety of usb/serial/shared devices (receipt printers, report printers, specialty archive printers, sigpads, scanners, webcams, etc).
Is there any feasible way to get an HTML5 site the ability to interface with local USB/serial peripherals, or with a local service (e.g., browse to www.site.com/app and have it interact with localhost:1234/api to request things like signatures and send stuff like print jobs)?
The other option I was thinking of is to have a local thin-client type setup, which requests UI elements from the remote server's API, but internally has logic to know what peripherals are doing and passes data via the API.
The least preferential item is to try to write some sort of browser plugin, which is is tied with using a java applet. Silverlight might work, but I haven't researched it too much.
Ideally we'd like to do this to make our app cross-platform, and we're not sure what the best practices are for our situation, or what is the path of least resistance, etc.
Try to embed a web browser into a standalone application and code the interaction in the backend:
Some alternatives:
CEF is cross platform https://code.google.com/p/chromiumembedded/
Old and tried SHDocVw ActiveX for embedding IE using COM on Windows http://msdn.microsoft.com/en-us/library/aa752040(v=vs.85).aspx
You could of course use a local service application to do the dirty work for you and you would have to communicate somehow: WebSockets, AJAX requests. There are ways around the security measures that are coded into modern browsers (cross domain requests and DNS trickery) but the major hurdle will be to get your customers to install a service. If you manage that, then the service could very well serve HTML pages directly and handle requests for peripherals.
What I would like to do is create a canvas that will show a network map. It's not really a network map but in terms of explaining it the network map example works best to not bog you down with details that don't pertain to my question.
On the network map I want to display routes the traffic takes. These routes change in time, sometimes as frequently as multiple times per minute. On the server side I have a log file to which each route change is appended as it happens.
I know how to create the canvas, I know how to draw my routes onto the canvas.
Is it possible to have the server push an update to the canvas without requiring a page reload/refresh, essentially requiring no user interaction at all? The routes drawn just automagically change?
This would need to work on IIS so a jscript or .Net based solution would be necessary. I won't be able to install PHP, Python, Ruby etc.
Thanks in advance for any insights you can provide.
I recommend that you look at a WebSockets solution to push the information from the server to the client (JavaScript). When you receive the update you can update the canvas as required.
Technologies you should look at if your preferred server technology is .NET would be a service like Pusher, who I work for, and our .NET APIs which let you push updates to the client via our REST API.
If you would prefer to host your own realtime infrastructure then you could look at WebSync (which is actually a Comet technology) which integrates with IIS and also XSockets. There are also a number of realtime technologies on this guide which may interest you. If you've any further questions just let me know.
Server-Sent Events: http://www.html5rocks.com/en/tutorials/eventsource/basics
( Server-sent events is a technology for providing push notifications from a server to a browser client in the form of DOM events. The Server-Sent Events EventSource API is now being standardized as part of HTML5[1] by the W3C. )
Yes, I've done this before (with an ajax-based drawing application). It's very possible. Send packets of information via AJAX (JSON or something), interpret them, and draw them on the client's canvas element. This is trivial to design (and easy to implement using something like jQuery). It seems that you already figured out you need to have a server-side script that pushes information to a web page and a web page that actually draws stuff on the canvas. That's essentially all it is.
We have a webapp that's backed by a java spring web application. Apparently our Rational Robot tool that we normally would use to stress test a browser application doesn't deal with the HTML5'ness of our app. We are considering simply scripting the raw http requests to beat on the application, but wondering if anyone knows of any tools out there to do the same without having to craft all of the http requests by hand?
Apache JMeter allows you to record all http requests by setting it up as a proxy. You can then save those requests and play them back in multiple threads to simulate users.
Fiddler with our free stress testing add-on called StresStimulus is another proxy that records HTTP requests and replays them with configurable user ramping.
If you have anything a bit complex, it would be easier to record a script in one of the load testing tools. I have used WebLOAD in the past, which handles things like fetching all the sub-components, script correlation, AJAX recording, etc.
You can record straight from the Android device, or use a desktop browser you like.
I want to find out how a java applet in a browser communicates with a server. Is possible to capture the network traffic?
Take a look at WireShark, it can do captures and protocol analysis, so it is probably what you want.
You just tell it to listen on your outgoing network interface, and it will capture the packets and allow you to view them. You will probably want to filter by the server IP, so you don't see all the other junk that is going on at the same time.
maybe you could use FireBug (Firefox extension) to monitor the traffic but I'm not sure if it works with Java Applets because applets run in the JVM. Give it a try.