server

I need to make requests from the server to application running on hardware at the users home. I can't let the application push the data to the server since i don't store the data, but need to forward it to a client-facing web app (Also i am not allowed to store the data on the server). I am currently unsure how to achieve this. My only idea is to have idle socket connections open where i can write the requests into. This seems complicated and i don't know whether it is scalable (is there a limit on open socket connections? How much resources do idle connections waste?). It is also a bit low

I'm working on an App, where I wanted the user to keep logged-in means always connected to the server after successful login(just like facebook app). I tried to google this but did not found any correct logic of this. Many website suggests to use SharedPreference but keeping the user's login cred. on SheredPreference is not good idea and did not provide any answer to stay connected to the server. I'm kinda stuck with this idea. I just need logic to implement this. Any suggestions and example code are welcome. I'm android noob. Storing user's credentials on device is not a good way of designing

I am experimenting with a file transfer program in Java and I wanted to create a server that would handle creating P2P connection between two clients. Don't know how that should work, exchanging sockets? I don't want to exchange IP address... Seen some questions similar (ev. Connecting two clients via server java ) but I have no idea how to achieve that. Thanks for your time It sounds like you are looking for nat traversal techniques. There is no single solution because there are many different network setups. Most p2p software employs a combination of different solutions, such as using IPv6

Below is a apache bench run for 10K requests with 50 concurrent threads. I need help understanding the results, does anything stand out in the results that might be pointing to something blocking and restricting more requests per second? I'm looking at the connection time section, and see 'waiting' and 'processing'. It shows the mean time for waiting is 208, and the mean time to connect is 0 and processing is 208..yet the total is 208. Can someone explain this to me as it doesn't make much sense to me. Connect time is time it took ab to establish connection with your server. you are probably

Say A sends a message to B and waits for a callback and then A probably sends new messages and B also sends many messages to A. What I mean other message exchanges happen during this time before callback happens. Does it create a race condition or block other message sending until the first callback is complete or does it enforce the order of callbacks so that say the callbacks of message 1,2,3,4,5 always arrive in the same order as the message was sent out? Assistance would be much appreciated. Well, the question involves a number of concepts - so hard to answer fully. I will try to t least

I make an asynchronous chat server in C++ using the boost library. Almost everything works fine. There are two ways for a client to disconnect: by pressing Ctrl + C (killing the client process) by entering "exit". The former is OK. However, the latter has a problem. If a client disconnects with "exit", the next message, sent by another client, appears without the first several characters. After that it's OK. For example: Several clients chat. One of them disconnects with "exit". After that, another client sends "0123456789abcdefghijk" and all clients receive only: "abcdefghijk". I don't know

When I run my django server from PyCharm it is not accessible from the outside world. I read that you can run in the cmd like that, and it works. python manage.py runserver 0.0.0.0:8000 How do I run it to be accessible to the outside world from PyCharm ? I need to run it from there is order to debug. thanks! At the upper-right corner (by default) of PyCharm you can edit the configuration for your server: In there specify as host 0.0.0.0 . Don't forget to take care of your firewall/NAT by opening and forwarding the appropriate ports. 来源： https://stackoverflow.com/questions/30422421/django-run