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Closed 10 years ago.
Does anyone know if it's possible to send a magic packet using the WebSocket API ?
Edit:
As my question seamed unclear. I want to know I using the API with Javascript I could send the UDP-datagram needed send a wake-on-lan packet.
I know it's possible using php with socket enabled, but with JS ?
If you mean:
"Can I use JavaScript in browser to send a WebSocket message that makes a specific, given byte sequence appear on the wire?"
Then the answer is no. Reason: the WebSocket protocol requires all client-to-server protocol payload to be masked. And the mask is generated randomly in the WebSocket browser implementation, so you have no chance (by design) to choose mask or payload for the desired byte sequence to appear on the wire.
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It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 10 years ago.
I'm going to start a pet-project, bringing this board game into web. For simplicity, imagine pvp chess instead.
I have very little expeirence with this kind of async programming. The only one - I wrote a simple chat with sinatra, using its streaming features.
I've got two closely related questions:
How should I organize game flow?
Should I store game-state in database? Or can I have a class, e.g. Game, and store everything in it? Second option sounds easier, and more natural, but is it possible to implement it in an application with client-server async nature?
How should client interact with server?
I'd like the board state to be updated in real-time. Is js EventSource the best option here?
Do I need anything beyond Sinatra application with its stream keyword? Do I need EventMachine?
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 10 years ago.
I am working on directshow filters and looking for the filter that take two input pins with one out put
Main idea is i want to write switch filter that can swith from one input pin to another input pin Please help me i am new in directshow filters
No standard filter of this kind. Write your own or look for third party solution. You request quite specific functionality (most likely you would have to make more assumptions as for its operation), so you would probably have to end up with your own custom filter.
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Closed 10 years ago.
I have a binary-only copy of an application written in Delphi 7; as part of its execution, it writes some data into a text file (not in plain text).
Is it possible to extract the data from the file if I know part of the input data and have a copy of this file? (What if it's encrypted?) I have no idea about the structure of the mentioned file.
And no, I don't have source code for the application -- I think that's obvious.
Yes it's possible, you would have to reverse engineer this application first (IDA, HIEW) and/or debug it while it stores the data to the file, contact me if you need more help.
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Closed 11 years ago.
My multicore machine is receiving packets and distributes them evenly (sort-of round robin) among its cores. Each core should decide whether to let the packet pass or drop it, depending solely on its origin address.
I need to find lock-less algorithm and data structure to allow this. Can you help?
If you are happy to use Java, or look at the design of Java source, you could chose a random key and then retrieve a queue from http://docs.oracle.com/javase/1.5.0/docs/api/java/util/concurrent/ConcurrentHashMap.html. Given the queue, you could add the packet to it without blocking if it was a http://docs.oracle.com/javase/1.5.0/docs/api/java/util/concurrent/ConcurrentLinkedQueue.html
Much of java.util.concurrent is due to Doug Lea, who has information on it at http://gee.cs.oswego.edu/dl/concurrency-interest/index.html.
Possibly overkill for your particular problem, but might satisfy a general request for info on data structures in this area.
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 11 years ago.
I have been searching a long time that codes. i want to create my app and when user open it, program find it gps location from google maps and will show companies near him. and show the "how to go there" as like google maps.
there are a lots of apps like that. but i cannot find the source codes. do you have any idea or example codes for kind of this app?
Thanks and Best Regards.
Fatih
You can use the Google Places API. One of the parameters passed to the API server is the location in latitude and longitude coordinates. The result data can be returned in either JSON or XML format.