My implementation allows to use both the webserver and the CL client at the same time.
The CL client will always be launched on the port specified in -UIPort (default value 8080).
Because the webserver is required to run on port 8080 by the handout, one must specify an UIPort different from 8080 for the gossiper in order to have both the CL client and the GUI (otherwise they would both use the same port).

For example, the following commands launch a gossiper that can only use the CL client on port 8080:
./Peerster -UIPort=8080 -gossipAddr=127.0.0.1:2000 -name=Alice
./Peerster -gossipAddr=127.0.0.1:2000 -name=Alice

On the other hand, the following command launches a gossiper that can use both the CL client on port 3000 and the GUI on port 8080:
./Peerster -UIPort=3000 -gossipAddr=127.0.0.1:2000 -name=Alice

For testing purposes I also created a new flag -GUIPort (default value 8080) that allows to launch the server on an arbitrary port.
The following command launches a gossiper that can use both the CL client on port 8080 and the GUI on port 8090:
./Peerster -UIPort=8080 -GUIPort=8090 -gossipAddr=127.0.0.1:2000 -name=Alice

Below is a screenshot of the GUI as well as some remarks concerning its utilization.

Some remarks:

• The webpage will not behave properly if its corresponding gossiper is stopped and then restarted. In that case one must:

1. Close the existing browser tab
2. Relaunch the gossiper
3. Open a new browser tab on the right port (e.g. 127.0.0.1:2000)

• The webpage will not behave properly if it is refreshed while its corresponding gossiper is running.

(See report for details on what we implemented)

The interface has barely changed for this final milestone. The list of artists on the network should appear below the list of private contacts on the left side of the window. Detected artists will automatically appear there next to a button that allows the user to subscribe to them. In order to publish a new artwork, use the following syntax on the command line of the client executable: ./client -UIPort=8080 -filename="someFile.jpg" -name=Alice