/**
* 获取文件后缀，本地和网络.
*
* @param url 文件地址
* @param response the response
* @return 文件后缀
*/
public static String getMIMEFromUrl(String url, HttpResponse response) {
if (AbStrUtil.isEmpty(url)) {
return null;
}
String mime = null;
try {
// 获取后缀
if (url.lastIndexOf(".") != -1) {
mime = url.substring(url.lastIndexOf("."));
if (mime.indexOf("/") != -1 || mime.indexOf("?") != -1 || mime.indexOf("&") != -1) {
mime = null;
}
}
if (AbStrUtil.isEmpty(mime)) {
// 获取文件名 这个效率不高
String fileName = getRealFileName(response);
if (fileName != null && fileName.lastIndexOf(".") != -1) {
mime = fileName.substring(fileName.lastIndexOf("."));
}
}
} catch (Exception e) {
e.printStackTrace();
}
return mime;
}
/**
* 获取文件后缀，本地.
*
* @param url 文件地址
* @param connection the connection
* @return 文件后缀
*/
public static String getMIMEFromUrl(String url, HttpURLConnection connection) {
if (AbStrUtil.isEmpty(url)) {
return null;
}
String suffix = null;
try {
// 获取后缀
if (url.lastIndexOf(".") != -1) {
suffix = url.substring(url.lastIndexOf("."));
if (suffix.indexOf("/") != -1 || suffix.indexOf("?") != -1 || suffix.indexOf("&") != -1) {
suffix = null;
}
}
if (AbStrUtil.isEmpty(suffix)) {
// 获取文件名 这个效率不高
String fileName = getRealFileName(connection);
if (fileName != null && fileName.lastIndexOf(".") != -1) {
suffix = fileName.substring(fileName.lastIndexOf("."));
}
}
} catch (Exception e) {
e.printStackTrace();
}
return suffix;
}
/**
* 描述：通过文件的网络地址从SD卡中读取图片，如果SD中没有则自动下载并保存.
*
* @param url 文件的网络地址
* @param type 图片的处理类型（剪切或者缩放到指定大小，参考AbImageUtil类） 如果设置为原图，则后边参数无效，得到原图
* @param desiredWidth 新图片的宽
* @param desiredHeight 新图片的高
* @return Bitmap 新图片
*/
public static Bitmap getBitmapFromSD(String url, int type, int desiredWidth, int desiredHeight) {
Bitmap bitmap = null;
try {
if (AbStrUtil.isEmpty(url)) {
return null;
}
// SD卡不存在 或者剩余空间不足了就不缓存到SD卡了
if (!isCanUseSD() || freeSdSpaceNeededToCache < freeSpaceOnSD()) {
bitmap = getBitmapFromURL(url, type, desiredWidth, desiredHeight);
return bitmap;
}
// 下载文件，如果不存在就下载，存在直接返回地址
String downFilePath = downloadFile(url, imageDownloadDir);
if (downFilePath != null) {
// 获取图片
return getBitmapFromSD(new File(downFilePath), type, desiredWidth, desiredHeight);
} else {
return null;
}
} catch (Exception e) {
e.printStackTrace();
}
return bitmap;
}
/**
* 获取文件名（.后缀），外链模式和通过网络获取.
*
* @param url 文件地址
* @param connection the connection
* @return 文件名
*/
public static String getCacheFileNameFromUrl(String url, HttpURLConnection connection) {
if (AbStrUtil.isEmpty(url)) {
return null;
}
String name = null;
try {
// 获取后缀
String suffix = getMIMEFromUrl(url, connection);
if (AbStrUtil.isEmpty(suffix)) {
suffix = ".ab";
}
name = AbMd5.MD5(url) + suffix;
} catch (Exception e) {
e.printStackTrace();
}
return name;
}
/**
* 获取文件名（不含后缀）.
*
* @param url 文件地址
* @return 文件名
*/
public static String getCacheFileNameFromUrl(String url) {
if (AbStrUtil.isEmpty(url)) {
return null;
}
String name = null;
try {
name = AbMd5.MD5(url);
} catch (Exception e) {
e.printStackTrace();
}
return name;
}
/**
* 获取文件名，通过网络获取.
*
* @param url 文件地址
* @return 文件名
*/
public static String getRealFileNameFromUrl(String url) {
String name = null;
try {
if (AbStrUtil.isEmpty(url)) {
return name;
}
URL mUrl = new URL(url);
HttpURLConnection mHttpURLConnection = (HttpURLConnection) mUrl.openConnection();
mHttpURLConnection.setConnectTimeout(5 * 1000);
mHttpURLConnection.setRequestMethod("GET");
mHttpURLConnection.setRequestProperty(
"Accept",
"image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
mHttpURLConnection.setRequestProperty("Accept-Language", "zh-CN");
mHttpURLConnection.setRequestProperty("Referer", url);
mHttpURLConnection.setRequestProperty("Charset", "UTF-8");
mHttpURLConnection.setRequestProperty("User-Agent", "");
mHttpURLConnection.setRequestProperty("Connection", "Keep-Alive");
mHttpURLConnection.connect();
if (mHttpURLConnection.getResponseCode() == 200) {
for (int i = 0; ; i++) {
String mine = mHttpURLConnection.getHeaderField(i);
if (mine == null) {
break;
}
if ("content-disposition".equals(mHttpURLConnection.getHeaderFieldKey(i).toLowerCase())) {
Matcher m = Pattern.compile(".*filename=(.*)").matcher(mine.toLowerCase());
if (m.find()) return m.group(1).replace("\"", "");
}
}
}
} catch (Exception e) {
e.printStackTrace();
AbLogUtil.e(AbFileUtil.class, "网络上获取文件名失败");
}
return name;
}
