webapp

SCIONLab Go Static Tester

Webapp Setup

Webapp is a Go application that will serve up a static web portal to make it easy to experiment with SCIONLab test apps on a virtual machine.

To install the SCIONLab webapp:

go get github.com/netsec-ethz/scion-apps/webapp

Local Infrastructure

To run the Go Web UI at default localhost 127.0.0.1:8000 run:

webapp

SCIONLab Virtual Machine

Using vagrant, make sure to edit your vagrantfile to provision the additional port for the Go web server by adding this line for port 8080 (for example, just choose any forwarding port not already in use by vagrant):

config.vm.network "forwarded_port", guest: 8080, host: 8080, protocol: "tcp"

To run the Go Web UI at a specific address (-a) and port (-p) like 0.0.0.0:8080 for a SCIONLabVM use:

webapp -a 0.0.0.0 -p 8080 -r .

Now, open a web browser at http://127.0.0.1:8080, to begin.

Development

For developing the web server go code, since it is annoying to make several changes, only to have to start and stop the web server each time, a watcher library like go-watcher is recommended.

go get github.com/canthefason/go-watcher
go install github.com/canthefason/go-watcher/cmd/watcher

After installation you can cd to the webapp.go directory and webapp will be rebuilt and rerun every time you save your source file changes, with or without command arguments.

cd ~/go/src/github.com/netsec-ethz/scion-apps/webapp
watcher -a 0.0.0.0 -p 8080 -r ..

or

cd ~/go/src/github.com/netsec-ethz/scion-apps/webapp
watcher

Webapp Features

This Go web server wraps several SCION test client apps and provides an interface for any text and/or image output received. SCIONLab Apps are on Github.

Two functional server tests are included to test the networks without needing specific sensor or camera hardware, imagetest and statstest.

Supported client applications include camerapp, sensorapp, and bwtester. For best results, ensure the desired server-side apps are running and connected to the SCION network first. Instructions to setup the servers are here. The web interface launched above can be used to run the client-side apps.

File System Browser

The File System Browser button on the front page will allow you to navigate and serve any files on the SCIONLab node from the root (-r) directory you specified (if any) when starting webapp.go.

bwtester client

Simply adjust the dials to the desired level, while the icon lock will allow you to keep one value constant.

camerapp client

The retrieved image will appear scaled down and can be clicked on to open a larger size.

sensorapp client

statstest server

This hardware-independent test will echo some remote machine stats from the Python script local-stats.py, which is piped to the server for transmission to clients. On your remote SCION server node run (substituting your own address parameters):

cd $GOPATH/src/github.com/netsec-ethz/scion-apps/webapp/tests/statstest/statsserver
python3 local-stats.py | sensorserver -s 1-15,[127.0.0.5]:35555

Now, from your webapp browser interface running on your virtual client SCION node, you can enter both client and server addresses and ask the client for remote stats by clicking on the sensorapp tab.

imagetest server

This hardware-independent test will generate an image with some remote machine stats from the Go app local-image.go, which will be saved locally for transmission to clients.

You may need golang.org's image package first:

go get golang.org/x/image

On your remote SCION server node run (substituting your own address parameters):

cd $GOPATH/src/github.com/netsec-ethz/scion-apps/webapp/tests/imgtest/imgserver
go build
./imgserver | imageserver -s 1-18,[127.0.0.8]:38887

Now, from your webapp browser interface running on your virtual client SCION node, you can enter both client and server addresses and ask the client for the most recently generated remote image by clicking on the camerapp tab.