Implement /math/pi endpoint

bin/.gitignore

@@ -0,0 +1,2 @@
+/main/
+/test/

src/main/java/com/example/HelloController.java

@@ -1,14 +0,0 @@
-package com.example.demo;
-
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-public class HelloController {
-
-    @GetMapping("/")
-    public String helloWorld() {
-        return "Hello from Spring!";
-    }
-
-}

src/main/java/com/example/demo/Controller.java

@@ -0,0 +1,60 @@
+package com.example.demo;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.net.ConnectException;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.channels.Channels;
+import java.nio.channels.ReadableByteChannel;
+import java.util.HashMap;
+
+import javax.imageio.ImageIO;
+
+@RestController
+public class Controller {
+	
+	public static void downloadFileFromUrl(String url, String file) throws IOException{
+		  File filer = new File(file);
+		  filer.createNewFile();
+		  
+		  URL website = new URL(url);
+		  HttpURLConnection connection = (HttpURLConnection) website.openConnection();
+		    /*for (String s : connection.getHeaderFields().keySet()) {
+		    	System.out.println(s+": "+connection.getHeaderFields().get(s));
+		    }*/
+		    connection.setRequestMethod("GET");
+		    //connection.setRequestProperty("Content-Type", "application/json");
+		    try {
+			  ReadableByteChannel rbc = Channels.newChannel(connection.getInputStream());
+			  FileOutputStream fos = new FileOutputStream(file);
+			  fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+			  fos.close();
+		    } catch (ConnectException e) {
+		    	System.out.println("Failed to connect, moving on...");
+		    }
+	  }
+	
+	@GetMapping("/math/pi")
+	public String piDisplay() {
+		return Double.toString(Math.PI);
+	}
+
+    @GetMapping("/image")
+    public HashMap<String,String> helloWorld(@RequestParam("url") String url){
+		try {
+			downloadFileFromUrl("http://pbs.twimg.com/media/EdKE8xzVcCEf1qd.jpg","temp");
+			BufferedImage img = ImageIO.read(new File("temp"));
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		return null;
+    }
+
+}