package com.jph.ufh.service;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Map;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.DefaultHttpClient;

import android.os.Handler;
 
/**
 * 採用HttpClient上傳檔案,支援多檔案上傳
 * @author jph
 * Date:2014.10.09
 */
public class UploadService {
	private static String url="http://10.219.57.16:8080/ServerForUpload/ServletForUpload";
//	private static String url="http://10.110.6.58:8080/ServerForUpload/ServletForUpload";
	public static final int UPLOAD_SUCCESS=0x123;
	public static final int UPLOAD_FAIL=0x124;
	private Handler handler;
	public UploadService(Handler handler) {
		// TODO Auto-generated constructor stub
		this.handler=handler;
	}	
	/**
	 * @param params 請求引數，包括請求的的方法引數method如：“upload”，
	 * 請求上傳的檔案型別fileTypes如：“.jpg.png.docx”
	 * @param files 要上傳的檔案集合
	 */
	public void uploadFileToServer(final Map<String, String> params, final ArrayList<File>files) {
		// TODO Auto-generated method stub	
		new Thread(new Runnable() {			
			@Override
			public void run() {
				// TODO Auto-generated method stub
				try {
					 if (uploadFiles(url,params,files)) {
						handler.sendEmptyMessage(UPLOAD_SUCCESS);//通知主執行緒資料傳送成功
					}else {
						//將資料傳送給伺服器失敗
					}
				} catch (Exception e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}				
			}
		}).start();
	}
	/**
	 * @param url servlet的地址
	 * @param params 要傳遞的引數
	 * @param files 要上傳的檔案
	 * @return true if upload success else false
	 * @throws ClientProtocolException
	 * @throws IOException
	 */
	private boolean uploadFiles(String url,Map<String, String>params,ArrayList<File>files) throws ClientProtocolException, IOException {
		HttpClient client=new DefaultHttpClient();// 開啟一個客戶端 HTTP 請求 
		HttpPost post = new HttpPost(url);//建立 HTTP POST 請求  
		MultipartEntityBuilder builder = MultipartEntityBuilder.create();
		builder.setCharset(Charset.forName("uft-8"));//設定請求的編碼格式
		builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);//設定瀏覽器相容模式
		int count=0;
		for (File file:files) {
			builder.addBinaryBody("file"+count, file);
			count++;
		}		
		builder.addTextBody("method", params.get("method"));//設定請求引數
		builder.addTextBody("fileTypes", params.get("fileTypes"));//設定請求引數
		HttpEntity entity = builder.build();// 生成 HTTP POST 實體  	
		post.setEntity(entity);//設定請求引數
		HttpResponse response = client.execute(post);// 發起請求 並返回請求的響應
		if (response.getStatusLine().getStatusCode()==200) {
			return true;
		}
		return false;		
	}
}