public class NetUtils {
    private static Context context = null;

    public static void setContext(Context context)
    {
        NetUtils.context = context;
    }


    public String get(String url, int cache)  {

        String result = null;
        Log.d("NetUtils get",":"+url);
        String md5 = Md5Util.md5(url);
        File casheDir = AndroidApplication.cacheDir;

        File f = null;
        if (casheDir!=null && cache>0) {
            Log.d("cashe", casheDir.getAbsolutePath());
            f = new File(casheDir, md5);
            final long time = new Date().getTime() / 1000;
            if (f.exists()) {
                if ((f.lastModified()/1000+cache)>time) {
                    result = readFile(f.getAbsolutePath());
                    if (result.equals("")) {
                        f=null;
                    }
                    else {
                        return result;
                    }
                }
            }
        }

        HttpGet getRequest = new HttpGet(url);

        try {
            HttpResponse getResponse = AndroidApplication.getClient().execute(getRequest);
            final int statusCode = getResponse.getStatusLine().getStatusCode();
            if (statusCode != HttpStatus.SC_OK) {
                result = "Error:"+statusCode;
            }

            HttpEntity getResponseEntity = getResponse.getEntity();

            if (getResponseEntity != null && statusCode == HttpStatus.SC_OK) {
                //result = EntityUtils.toString(getResponseEntity);

                    InputStream is = getResponseEntity.getContent();
                    result = convertStreamToString(is,f);
                    getResponseEntity = null;


                if (f!=null) {
                    BufferedOutputStream os = new BufferedOutputStream(new FileOutputStream(f));
                    os.write(result.getBytes());
                    os.flush();
                    os.close();
                }
            }
        }
        catch (IOException e) {
            getRequest.abort();
            if (f!=null) {
                if (f.exists()) {
                    Log.d("NetUtils IOException", f.getAbsolutePath());
                    return readFile(f.getAbsolutePath());
                }
            }
            result = "Error:"+e.toString();
        }
        //Log.d("NetUtils result:",result.substring(0, Math.min(result.length(), 150)));
        return result;
    }
    private String readFile(String filePath) {
        StringBuffer fileData = new StringBuffer(0);
        try {

            BufferedReader reader = new BufferedReader(new FileReader(filePath));
            char[] buf = new char[16192];
            int numRead=0;
            while((numRead=reader.read(buf)) != -1){
                fileData.append(buf, 0, numRead);
            }
            Log.d("FILEData", fileData.toString());
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return fileData.toString();
    }