Add read capability

src/main/java/frc4388/utility/DesmosServer.java

@@ -22,6 +22,8 @@ public class DesmosServer extends Thread {
 
     private static boolean running = false;
     
+    public static boolean debug = false;
+    
     private int activePort;
     
     /** 
@@ -58,8 +60,12 @@ public class DesmosServer extends Thread {
      * @throws IOException
      * */
     public void runServer(int port) throws IOException {
+    	System.out.println("Initializing DesmosServer on port " + port + "...");
+    	
         ServerSocket serverSocket = new ServerSocket(port);
         running = true;
+        
+        System.out.println("DesmosServer is active!");
 
         while(true) {
             Socket client = serverSocket.accept();
@@ -74,21 +80,39 @@ public class DesmosServer extends Thread {
      * @throws IOException
      * */
     public void handleClient(Socket client) throws IOException {
-        InputStreamReader clientStream = new InputStreamReader(client.getInputStream());
+    	InputStreamReader clientStream = new InputStreamReader(client.getInputStream());
         BufferedReader bufferedReader = new BufferedReader(clientStream);
 
-        ArrayList<String> requestLines = new ArrayList<>();
-
-        while(bufferedReader.ready()) {
-            String read = bufferedReader.readLine();
-            requestLines.add(read + "\r\n");
+        ArrayList<String> headers = new ArrayList<>();
+        
+        if(debug) {
+        	System.out.println("debug");
         }
 
+        String header;
+        while((header = bufferedReader.readLine()).length() != 0) {
+            headers.add(header);
+        }
+        
+        String body = "";
+        while(bufferedReader.ready()) {
+            body += (char) bufferedReader.read();
+        }
+        
+        readVariables(body);
+
         sendResponse(client);
     }
 
     /**
-     * Sends JSON response
+     * Sends JSON response with format
+     * <p>
+     * [
+     *     {"int": "24"},
+     *     {"double": "2.4"},
+     *     {"point": "(2,4)"},
+     *     {"list": "[2,4]"}
+     * ]
      * 
      * @param The client connection
      * @throws IOException
@@ -96,6 +120,13 @@ public class DesmosServer extends Thread {
     public void sendResponse(Socket client) throws IOException {
         OutputStream clientOutput = client.getOutputStream();
         
+        // Write Headers
+        clientOutput.write("HTTP/1.1 200 OK\r\n".getBytes());
+        clientOutput.write("Access-Control-Allow-Origin: *\r\n".getBytes());
+        clientOutput.write("Keep-Alive: timeout=2, max=100\r\n".getBytes());
+        clientOutput.write("Connection: Keep-Alive\r\n".getBytes());
+        clientOutput.write("Content-Type: application/json\r\n\r\n".getBytes());
+        
         clientOutput.write(getJSONOutput().getBytes());
         clientOutput.flush();
         clientOutput.close();
@@ -111,7 +142,7 @@ public class DesmosServer extends Thread {
 
         if(!desmosVariables.isEmpty()) {
 	        for(String key : desmosVariables.keySet()) {
-	            json += "{"
+	            json += "\n\t{"
 	                + "\"name\":\"" + key + "\","
 	                + "\"value\":\"" + desmosVariables.get(key) + "\""
 	                + "},";
@@ -120,10 +151,20 @@ public class DesmosServer extends Thread {
 	        json = json.substring(0, json.length()-1); // remove comma at the end
         }
         
-        json += "]";
+        json += "\n]";
 
         return json;
     }
+    
+    public static void readVariables(String requestBody) {
+    	for(String variable : requestBody.split("\n")) {
+    		if(variable.equals(""))
+    			break;
+    		
+    		String[] readVar = variable.split("\t");
+    		readVariables.put(readVar[0], readVar[1]);
+    	}
+    }
 
     public static boolean isRunning() {
         return running;
@@ -143,14 +184,10 @@ public class DesmosServer extends Thread {
         desmosVariables.put(name, "(" + point.x + "," + point.y + ")");
     }
     
-    public static void putIntegerArray(String name, int... arr) {
+    public static void putArray(String name, double... arr) {
     	desmosVariables.put(name, Arrays.toString(arr).replace(" ", ""));
     }
-    
-    public static void putDoubleArray(String name, double... arr) {
-    	desmosVariables.put(name, Arrays.toString(arr).replace(" ", ""));
-    }
-    
+
     // ---------------------------------------------------------------------
 
     public static int readInteger(String name) {
@@ -170,4 +207,14 @@ public class DesmosServer extends Thread {
 
         return point;
     }
+    
+    public static double[] readArray(String name) {
+    	String[] unparsed = readVariables.get(name).split(",");
+    	double[] arr = new double[unparsed.length];
+    	
+    	for(int i = 0; i < arr.length; i++)
+    		arr[i] = Integer.parseInt(unparsed[i]);
+    	
+    	return arr;
+    }
 }