Ask, how to send the file to the terminal server via the Internet?

Now you want (how designated neighborhoods ~) to be specified by the terminal server to send files through the Internet, so do not know how to communicate with each other, or only let through a webservice server terminal timing to get between them? Feel for the server on the Internet to find the specified terminal, then what to do on these terminals? Absolutely no clue on big door pointing ~ first thank you.<-! Main posts under Banner (D4) -><-! Posts under the main text (D5) ->
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Depends on how you pass, and if it is, then the file, json data, if only to determine the client doget and dopst send a string on the line.
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Thanks to reply but also ask, analogy, I want to give my phone to send a picture of words, how to find my cell phone from the Internet, the phone is not on what to do to deal with?

        


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First Mobile APP initiative sends a request to the server, the server is maintained even after long connection, then the server can send pictures to a specified mobile phone client.
This is somewhat similar to push function. Like SMS as the first in the service area, your phone signal is normal. Personal feeling is through mobile phone's device ID to bind.
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reference to the third floor birdsaction reply:

First Mobile APP initiative to send a request to the server, even on servers maintained long after the connection, then the server can send pictures to a specified mobile client.
This is somewhat similar to push function. Like SMS as the first in the service area, your phone signal is normal. Personal feeling is through mobile phone's device ID to bind.

Thanks so much.

Is about how to connect to the server, how to maintain a long connection, etc., now no direction can recommend more relevant aspects of Information website or blog?

        


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Recommend that you use apache mina or netty, this framework better to do server.
If you do not understand socket programming, it is recommended to learn about, and then do the project. Simple online search about a lot of information. Including long connection,
But the connection is not closed long stream.