FRC Java TCP client - Page 2

yash101 · #16 30-08-2014, 18:34

I am actually now going to use a web server. Since I am using dclib, a web server is a no-brainer and only requires like 5 lines of code! I think I'll use the HttpClient in the cRIO from there! That should work just perfectly. It is the lag that I think of, though

The nice thing, however, is that I can now send POST messages and "inject" values into the serve table. If one table is not good enough, I can also spawn multiple servers with multiple ports too!

JesseK · #17 01-09-2014, 15:29

A web server could be interesting. We just got done experimenting with algorithmic JSON interpretation at work, and it is really promising for fast network comms.

yash101 · #18 01-09-2014, 15:46

I think I am just about done! I have even written a web interface, so the drivers can access the stored variables! It is really fast too and uses 0.7% CPU of one core on my i3 1.4GHz.
I have attached some screenshots. Also, I use a RAM cache (which is written in STL), so page loads are almost instant!

The code (as usual), is in my GitHub "Other" repositiory, here

I also have my server up at the moment, here.

orangelight · #19 01-09-2014, 16:28

Quote:

Originally Posted by yash101

I think I am just about done! I have even written a web interface, so the drivers can access the stored variables! It is really fast too and uses 0.7% CPU of one core on my i3 1.4GHz.
I have attached some screenshots. Also, I use a RAM cache (which is written in STL), so page loads are almost instant!

The code (as usual), is in my GitHub "Other" repositiory, here

I also have my server up at the moment, here.

Looks cool, I may look into HTTP servers after I get done with what I want todo with my TCP one.

yash101 · #20 01-09-2014, 16:51

The web server implementation was extremely simple. If you noticed, I am using DLib. DLib adds some of the simplest socket APIs you could imagine!

PHP Code:


			
class web_server : public server_http

{

    const std::string on_request(const incoming_things& incoming, outgoing_things& outgoing)

    {

        return "<html><body><h1>Hello World!</h1></body></html>";

    }

};

I used this, plus a bunch of HTML + CSS + JavaScript skills to make this. I think I should make a new thread about this software because it is something that many teams might want for communications. The main problem is speed, but it has an extremely vast feature set!

orangelight · #21 01-09-2014, 19:23

I was thinking about making android apps for my team to do debugging and testing next year. But I don't know what the delay should be for the client to ask the robot server for information about sensors and motors.

yash101 · #22 01-09-2014, 23:33

It ends up that my program is designed flexibly so you can run it on any device with a web browser. It requires HTML5 for some nifty features, though. However, I have designed it for webkit-based devices because cross-browser adds tons of unnecessary code when adding display things, like animations, visual ques, etc.

I just generated a CMakeLists.txt, so just copy-and-paste the code into your platform, run make clean, cmake ., and then make! You can then run the project. I also have removed a great portion of DLib functionality because it is unnecessary! I kept getting X11 errors because I didn't link it. However, I was using the preprocessor to not compile that code, so I don't know what is up with that!

I am still developing this appication. However, if you want to download and compile it in Linux, here's my compile script:

PHP Code:


			
$~ wget https://github.com/yash101/Other/raw/master/DLib/DevNodeServer/DevServer2/CMAKE_STANDALONE/install.sh && chmod +x install.sh && ./install.sh

To change the port number, use the install script. Enter the folder dserv/src. Edit config.hpp, and change the PORTNO definition to your favorite port!

Enjoy! I will roll out Java and C++ APIs when I have the ability to test them!

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