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package net.wujingchao.android.utility
import android.content.Context;
import android.os.Environment;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import java.util.UUID;
import com.mixiaofan.App;
public class DownloadUtil {
private static final int TIME_OUT = 30*1000; //超时时间
private static final String CHARSET = "utf-8"; //设置编码
private DownloadUtil() {
throw new UnsupportedOperationException("DownloadUtil cannot be instantiated");
}
/**
* @param file 上传文件
* @param RequestURL 上传文件URL
* @return 服务器返回的信息，如果出错则返回为null
*/
public static String uploadFile(File file,String RequestURL) {
String BOUNDARY = UUID.randomUUID().toString(); //边界标识 随机生成 String PREFIX = "--" , LINE_END = "\r\n";
String PREFIX = "--" , LINE_END = "\r\n";
String CONTENT_TYPE = "multipart/form-data"; //内容类型
try {
URL url = new URL(RequestURL);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(TIME_OUT);
conn.setConnectTimeout(TIME_OUT);
conn.setDoInput(true); //允许输入流
conn.setDoOutput(true); //允许输出流
conn.setUseCaches(false); //不允许使用缓存
conn.setRequestMethod("POST"); //请求方式
conn.setRequestProperty("Charset", CHARSET);
conn.setRequestProperty("Cookie", "PHPSESSID=" + App.getSessionId());
//设置编码
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);
if(file!=null) {
/** * 当文件不为空，把文件包装并且上传 */
OutputStream outputSteam=conn.getOutputStream();
DataOutputStream dos = new DataOutputStream(outputSteam);
StringBuffer sb = new StringBuffer();
sb.append(PREFIX);
sb.append(BOUNDARY); sb.append(LINE_END);
/**
* 这里重点注意：
* name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件
* filename是文件的名字，包含后缀名的 比如:abc.png
*/
sb.append("Content-Disposition: form-data; name=\"img\"; filename=\""+file.getName()+"\""+LINE_END);
sb.append("Content-Type: application/octet-stream; charset="+CHARSET+LINE_END);
sb.append(LINE_END);
dos.write(sb.toString().getBytes());
InputStream is = new FileInputStream(file);
byte[] bytes = new byte[1024];
int len;
while((len=is.read(bytes))!=-1)
{
dos.write(bytes, 0, len);
}
is.close();
dos.write(LINE_END.getBytes());
byte[] end_data = (PREFIX+BOUNDARY+PREFIX+LINE_END).getBytes();
dos.write(end_data);
dos.flush();
/**
* 获取响应码 200=成功
* 当响应成功，获取响应的流
*/
ByteArrayOutputStream bos = new ByteArrayOutputStream();
InputStream resultStream = conn.getInputStream();
len = -1;
byte [] buffer = new byte[1024*8];
while((len = resultStream.read(buffer)) != -1) {
bos.write(buffer,0,len);
}
resultStream.close();
bos.flush();
bos.close();
String info = new String(bos.toByteArray());
int res = conn.getResponseCode();
if(res==200){
return info;
}else {
return null;
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (ProtocolException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
public static byte[] download(String urlStr) {
HttpURLConnection conn = null;
InputStream is = null;
byte[] result = null;
ByteArrayOutputStream bos = null;
try {
URL url = new URL(urlStr);
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(TIME_OUT);
conn.setReadTimeout(TIME_OUT);
conn.setDoInput(true);
conn.setUseCaches(false);//不使用缓存
if(conn.getResponseCode() == 200) {
is = conn.getInputStream();
byte [] buffer = new byte[1024*8];
int len;
bos = new ByteArrayOutputStream();
while((len = is.read(buffer)) != -1) {
bos.write(buffer,0,len);
}
bos.flush();
result = bos.toByteArray();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if(bos != null){
bos.close();
}
if (is != null) {
is.close();
}
if (conn != null)conn.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}
/**
* 获取缓存文件
*/
public static File getDiskCacheFile(Context context,String filename,boolean isExternal) {
if(isExternal && (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))) {
return new File(context.getExternalCacheDir(),filename);
}else {
return new File(context.getCacheDir(),filename);
}
}
/**
* 获取缓存文件目录
*/
public static File getDiskCacheDirectory(Context context) {
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
return context.getExternalCacheDir();
}else {
return context.getCacheDir();
}
}
}
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