package com.taumu.rnDynamicSplash.utils;

import android.os.Handler;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpUtils {
    public interface Callback {
        void onResponse(String jsonString);
    }

    public static void get(final String requestUrl, final Callback callback) {
        final Handler handler = new Handler();

        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    URL url = new URL(requestUrl);
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setConnectTimeout(5000);
                    connection.setRequestMethod("GET");
                    //获得结果码
                    int responseCode = connection.getResponseCode();
                    if (responseCode == 200) {
                        //请求成功 获得返回的流
                        InputStream is = connection.getInputStream();
                        byte[] data = readStream(is);
                        final String json = new String(data);
                        handler.post(new Runnable() {
                            @Override
                            public void run() {
                                callback.onResponse(json);
                            }
                        });
                    } else {
                        //请求失败
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }

    public static byte[] readStream(InputStream input) throws IOException {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        byte[] buffer = new byte[4096];
        int n;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
        }
        return output.toByteArray();
    }
}