/*
 * Copyright 2016 LINE Corporation
 *
 * LINE Corporation licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package com.example.bot.spring.echo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import com.linecorp.bot.model.event.Event;
import com.linecorp.bot.model.event.MessageEvent;
import com.linecorp.bot.model.event.message.TextMessageContent;
import com.linecorp.bot.model.message.TextMessage;
import com.linecorp.bot.spring.boot.annotation.EventMapping;
import com.linecorp.bot.spring.boot.annotation.LineMessageHandler;


import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;


@SpringBootApplication
@LineMessageHandler
public class EchoApplication {
    public static void main(String[] args) {
        SpringApplication.run(EchoApplication.class, args);
    }
        
    @EventMapping
    public TextMessage handleTextMessageEvent(MessageEvent<TextMessageContent> event)  {
        System.out.println("event: " + event);
        //return new TextMessage("TEST: "+event.getMessage().getText());

        try {
            URL url = new URL("http://www.itcuties.com");
            InputStream is = url.openStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
             
            String line;
            while ( (line = br.readLine()) != null)
                System.out.println(line);
             
            br.close();
            is.close();
             
        } catch (Exception e) {
            e.printStackTrace();
        }   
 
        //URL website = new URL("http://cdn.crunchify.com/wp-content/uploads/code/json.sample.txt");
        
//        return new TextMessage(response.toString());
    }

    @EventMapping
    public void handleDefaultMessageEvent(Event event) {
        System.out.println("event: " + event);
    }
   

}

/*
 * Copyright 2016 LINE Corporation
 *
 * LINE Corporation licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package com.example.bot.spring.echo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import com.linecorp.bot.model.event.Event;
import com.linecorp.bot.model.event.MessageEvent;
import com.linecorp.bot.model.event.message.TextMessageContent;
import com.linecorp.bot.model.message.TextMessage;
import com.linecorp.bot.spring.boot.annotation.EventMapping;
import com.linecorp.bot.spring.boot.annotation.LineMessageHandler;


import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;


@SpringBootApplication
@LineMessageHandler
public class EchoApplication {
    public static void main(String[] args) {
        SpringApplication.run(EchoApplication.class, args);
    }
        
    @EventMapping
    public TextMessage handleTextMessageEvent(MessageEvent<TextMessageContent> event)  {
        System.out.println("event: " + event);
        //return new TextMessage("TEST: "+event.getMessage().getText());

        try {
            URL url = new URL("http://www.itcuties.com");
            InputStream is = url.openStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
             
            String line;
            while ( (line = br.readLine()) != null)
                System.out.println(line);
             
            br.close();
            is.close();
             
        } catch (Exception e) {
            e.printStackTrace();
        }   
         return new TextMessage("TEST: "+event.getMessage().getText());
        //URL website = new URL("http://cdn.crunchify.com/wp-content/uploads/code/json.sample.txt");
        
//        return new TextMessage(response.toString());
    }

    @EventMapping
    public void handleDefaultMessageEvent(Event event) {
        System.out.println("event: " + event);
    }
   

}

Update EchoApplication.java