@Override
public void onCheckRequestHeaders(String requestUrl, HttpRequestBase request) {
if (request == null) {
throw new IllegalArgumentException("Http Request is null");
}
if (SUPPORT_RANGED) {
// 目前只有大文件下载才会做此接口回调，在此回调中可以增加断点续传
if (request instanceof HttpGet) {
String saveFile =
mDownloadFilenameCreateListener != null
? mDownloadFilenameCreateListener.onFilenameCreateWithDownloadUrl(requestUrl)
: mDefaultDownloadFilenameCreateListener.onFilenameCreateWithDownloadUrl(
requestUrl);
File bigCacheFile = new File(INPUT_STREAM_CACHE_PATH);
if (!bigCacheFile.exists() || !bigCacheFile.isDirectory()) {
bigCacheFile.delete();
bigCacheFile.mkdirs();
}
File tempFile = new File(INPUT_STREAM_CACHE_PATH + saveFile);
long fileSize = 0;
if (tempFile.exists()) {
fileSize = tempFile.length();
} else {
fileSize = 0;
}
request.addHeader("RANGE", "bytes=" + fileSize + "-");
}
}
}
// 检查缓存目录中是否已经下载过文件
private String checkFromCache(DownloadRequest request) {
if (request != null && !TextUtils.isEmpty(request.mDownloadUrl)) {
String saveUrl =
mDownloadFilenameCreateListener != null
? mDownloadFilenameCreateListener.onFilenameCreateWithDownloadUrl(
request.mDownloadUrl)
: mDefaultDownloadFilenameCreateListener.onFilenameCreateWithDownloadUrl(
request.mDownloadUrl);
if (TextUtils.isEmpty(DOWNLOADED_FILE_DIR)) {
return null;
}
File dir = new File(DOWNLOADED_FILE_DIR);
if (!dir.exists() || dir.isFile()) {
return null;
}
String extension =
TextUtils.isEmpty(request.mFileExtension) ? "" : "." + request.mFileExtension;
File cachedFile = new File(DOWNLOADED_FILE_DIR + saveUrl + extension);
if (cachedFile.exists()) {
if (DEBUG) {
CommonUtilsConfig.LOGD_WITH_TIME(
"<<<<< [[find in cache]] >>>>> ::::::::: " + cachedFile.getAbsolutePath());
}
return cachedFile.getAbsolutePath();
}
}
if (DEBUG) {
CommonUtilsConfig.LOGD_WITH_TIME(
"<<<<< [[can not find in cache]] >>>>> ::::::::: " + request.toString());
}
return null;
}
@Override
public String onInputStreamReturn(String requestUrl, InputStream is) {
// if (!UtilsRuntime.isSDCardReady()) {
// UtilsConfig.LOGD("return because unmount the sdcard");
// return null;
// }
if (DEBUG) {
CommonUtilsConfig.LOGD("");
CommonUtilsConfig.LOGD("//-------------------------------------------------");
CommonUtilsConfig.LOGD("||");
CommonUtilsConfig.LOGD("|| [[FileDownloader::onInputStreamReturn]] : ");
CommonUtilsConfig.LOGD("|| try to download [[BIG]] file with url : " + requestUrl);
CommonUtilsConfig.LOGD("||");
CommonUtilsConfig.LOGD("\\-------------------------------------------------");
CommonUtilsConfig.LOGD("");
}
if (is != null) {
String saveUrl =
mDownloadFilenameCreateListener != null
? mDownloadFilenameCreateListener.onFilenameCreateWithDownloadUrl(requestUrl)
: mDefaultDownloadFilenameCreateListener.onFilenameCreateWithDownloadUrl(requestUrl);
File bigCacheFile = new File(INPUT_STREAM_CACHE_PATH);
if (!bigCacheFile.exists() || !bigCacheFile.isDirectory()) {
bigCacheFile.delete();
bigCacheFile.mkdirs();
}
long curTime = 0;
if (DEBUG) {
CommonUtilsConfig.LOGD(
"try to download from inputstream to local path = "
+ INPUT_STREAM_CACHE_PATH
+ saveUrl
+ " for orgin URL : "
+ requestUrl);
curTime = System.currentTimeMillis();
}
// download file
int totalSize = 0;
try {
totalSize = is.available();
} catch (Exception e) {
e.printStackTrace();
}
long downloadSize = 0;
String savePath = null;
String targetPath = INPUT_STREAM_CACHE_PATH + saveUrl;
byte[] buffer = new byte[4096 * 2];
File f = new File(targetPath);
int len;
OutputStream os = null;
boolean isClosed = false;
try {
if (f.exists()) {
downloadSize = f.length();
}
os = new FileOutputStream(f, true);
while ((len = is.read(buffer)) != -1) {
os.write(buffer, 0, len);
// add listener to Notify UI
downloadSize += len;
handleProcess(requestUrl, totalSize, (int) downloadSize);
if (RUNTIME_CLOSE_SUPPORTED) {
DownloadRequest r = findCacelRequest(requestUrl);
if (r != null && r.mStatus == DownloadRequest.STATUS_CANCEL) {
CommonUtilsConfig.LOGD("try to close is >>>>>>>>>>>>>>>>>>>>");
is.close();
isClosed = true;
}
}
}
savePath = targetPath;
} catch (Exception ex) {
ex.printStackTrace();
} finally {
if (os != null) {
try {
os.close();
} catch (Exception e) {
e.printStackTrace();
}
}
buffer = null;
}
// end download
try {
if (!isClosed) {
is.close();
}
} catch (Exception e) {
e.printStackTrace();
}
if (!isClosed && !TextUtils.isEmpty(savePath) && checkInputStreamDownloadFile(savePath)) {
if (DEBUG) {
long successTime = System.currentTimeMillis();
CommonUtilsConfig.LOGD(
"[[onInputStreamReturn]] save Request url : "
+ saveUrl
+ " success ||||||| and the saved file size : "
+ FileUtil.convertStorage(new File(savePath).length())
+ ", save cost time = "
+ (successTime - curTime)
+ "ms");
}
return savePath;
} else {
// 遗留文件，用于下次的断点下载
if (DEBUG) {
CommonUtilsConfig.LOGD(
"===== failed to downlaod requestUrl : "
+ requestUrl
+ " beacuse the debug 断点 =====");
}
return null;
}
} else {
if (DEBUG) {
CommonUtilsConfig.LOGD(
"===== failed to downlaod requestUrl : "
+ requestUrl
+ " beacuse requestUrl is NULL =====");
}
}
return null;
}