$$docker ps # note the name of the running container, e.g. neurodeskapp-49977 # now connect to this container docker exec --user=jovyan -ti neurodeskapp-49977 bash$$

$$brew install coreutils brew install websocat$$

$$wget https://github.com/vi/websocat/releases/download/v1.12.0/websocat.x86_64-unknown-linux-musl chmod +x websocat.x86_64-unknown-linux-musl sudo mv websocat.x86_64-unknown-linux-musl /usr/local/bin/websocat apt install jq$$

$$echo JUPYTERHUB_USER=$JUPYTERHUB_USER echo JPY_API_TOKEN=$JPY_API_TOKEN$$

$$USER=$JUPYTERHUB_USER USER_TOKEN=$JPY_API_TOKEN API_URL=$EXAMPLE_API_URL TERMINAL_RESPONSE=$(curl -k -s -X POST \ -H "Authorization: token $USER_TOKEN" \ "https://$API_URL/user/$USER/api/terminals" || echo '{"error": "curl_failed"}') echo "Terminal API response: $TERMINAL_RESPONSE" TERMINAL_NAME=$(echo "$TERMINAL_RESPONSE" | jq -r '.name // empty') if [ -n "$TERMINAL_NAME" ] && [ "$TERMINAL_NAME" != "null" ] && [ "$TERMINAL_NAME" != "empty" ]; then echo "✅ Terminal created successfully: $TERMINAL_NAME" else echo "❌ Terminal creation failed" echo "Full response: $TERMINAL_RESPONSE" # more info about the user echo "Checking user info..." USER_INFO=$(curl -k -s -H "Authorization: token $USER_TOKEN" "https://$API_URL/hub/api/users/$USER" || echo '{"error": "failed"}') echo "User info: $USER_INFO" fi # Function to test WebSocket connection test_websocket_connection() { local token="$1" echo "Testing WebSocket connection..." # Test connection WS_TEST=$(echo '["stdin", "echo test_connection\r\n"]' | \ timeout 15 websocat --text "wss://$API_URL/user/$USER/terminals/websocket/$TERMINAL_NAME" \ -H "Authorization: token $token" 2>&1 | head -10) if [ $? -eq 0 ] && [ -n "$WS_TEST" ]; then echo "WebSocket response: $WS_TEST" # Check if we got expected output format if echo "$WS_TEST" | grep -q '\["stdout"'; then echo "✅ WebSocket connection successful with proper output format" return 0 elif echo "$WS_TEST" | grep -q 'test_connection'; then echo "✅ WebSocket connection successful" return 0 else echo "⚠️ WebSocket connected but unexpected format" echo "Raw output: $WS_TEST" return 1 fi else echo "❌ WebSocket connection failed" echo "Error: $WS_TEST" return 1 fi } # Test with user token if test_websocket_connection "$USER_TOKEN"; then echo "✅ WebSocket connection working with user token" else echo "❌ WebSocket connection failed" echo "" echo "🔍 Additional debugging info:" echo "- Terminal exists: $TERMINAL_NAME" echo "- User token: ${USER_TOKEN}..." echo "- API accessible: $(curl -k -s -o /dev/null -w "%{http_code}" "$API_URL")" echo "- WebSocket URL: ws://$API_URL/user/$USER/terminals/websocket/$TERMINAL_NAME" fi # Function to send command and get response send_command() { local cmd="$1" echo "Testing command: $cmd" local clean_api_url=${API_URL#*//} local output="" for attempt in {1..3}; do echo " Attempt $attempt..." echo "$ $cmd" # Send command echo "[\"stdin\", \"$cmd\\r\\n\"]" | \ timeout 15 websocat --text \ "wss://$clean_api_url/user/$USER/terminals/websocket/$TERMINAL_NAME" \ -H "Authorization: token $USER_TOKEN" sleep 10 # get the terminal output local output=$(echo '["stdin", ""]' | \ timeout 15 websocat --text \ "wss://$clean_api_url/user/$USER/terminals/websocket/$TERMINAL_NAME" \ -H "Authorization: token $USER_TOKEN") if [ -n "$output" ]; then echo "$output" | \ grep '^\["stdout"' | \ sed 's/^\["stdout", *"//; s/"\]$//' | \ sed 's/\\u001b\[[?]*[0-9;]*[a-zA-Z]//g; s/\\r\\n/\n/g; s/\\r/\n/g' | \ # sed -n "/\$ $cmd/,/\$ /p" | \ sed '1d; $d' | \ grep -v "^$" return 0 fi echo "(no output), response: ${output}" sleep 2 done echo " ❌ Command failed after 3 attempts" echo " Output: $output" return 1 } send_command "touch test3.txt" send_command "ls" send_command "ml fsl; fslmaths" send_command "pwd" send_command "ml ants; antsRegistration" # To start an interactive terminal session interactive_terminal() { local clean_api_url=${API_URL#*//} echo "=== Interactive Terminal Started ===" echo "Type 'exit' to quit" echo "==================================" while true; do echo -n "$ " read -r user_cmd # Exit condition if [[ "$user_cmd" == "exit" ]]; then echo "Terminal session ended." break fi # Skip empty commands if [[ -z "$user_cmd" ]]; then continue fi echo "Executing: $user_cmd" # Send command echo "[\"stdin\", \"$user_cmd\\r\\n\"]" | \ timeout 15 websocat --text \ "wss://$clean_api_url/user/$USER/terminals/websocket/$TERMINAL_NAME" \ -H "Authorization: token $USER_TOKEN" sleep 10 # get the terminal output local output=$(echo '["stdin", ""]' | \ timeout 15 websocat --text \ "wss://$clean_api_url/user/$USER/terminals/websocket/$TERMINAL_NAME" \ -H "Authorization: token $USER_TOKEN") if [ -n "$output" ]; then echo "$output" | \ grep '^\["stdout"' | \ sed 's/^\["stdout", *"//; s/"\]$//' | \ sed 's/\\u001b\[[?]*[0-9;]*[a-zA-Z]//g; s/\\r\\n/\n/g; s/\\r/\n/g' | \ # sed -n "/\$ $user_cmd/,/\$ /p" | \ sed '1d; $d' | \ grep -v "^$" else echo "(output error, response:) ${output}" fi echo "" done } interactive_terminal$$