private void readResponseHeaders(HttpURLConnection conn) {
info.disposition = conn.getHeaderField("Content-Disposition");
info.location = conn.getHeaderField("Content-Location");
info.mimeType = DLUtil.normalizeMimeType(conn.getContentType());
final String transferEncoding = conn.getHeaderField("Transfer-Encoding");
if (TextUtils.isEmpty(transferEncoding)) {
try {
info.totalBytes = Integer.parseInt(conn.getHeaderField("Content-Length"));
LogUtils.e("安装包的大小：" + info.totalBytes);
} catch (NumberFormatException e) {
info.totalBytes = -1;
}
} else {
info.totalBytes = -1;
}
if (info.totalBytes == -1
&& (TextUtils.isEmpty(transferEncoding) || !transferEncoding.equalsIgnoreCase("chunked")))
throw new RuntimeException("Can not obtain size of download file.");
if (TextUtils.isEmpty(info.fileName))
info.fileName = DLUtil.obtainFileName(info.realUrl, info.disposition, info.location);
}
private void dlInit(HttpURLConnection conn, int code) throws Exception {
readResponseHeaders(conn);
// DLDBManager.getInstance(context).updateTaskInfo(info);
try {
LogUtils.e("保存数据库前安装包的大小：" + info.totalBytes);
mDLInfoDao.update(info);
} catch (SQLException e) {
e.printStackTrace();
}
if (!DLUtil.createFile(info.dirPath, info.fileName))
throw new DLException("Can not create file");
info.file = new File(info.dirPath, info.fileName);
// if (info.file.exists() && info.file.length() == info.totalBytes) {
// Log.d(TAG, "The file which we want to download was already here.");
// return;
// }
if (info.hasListener) info.listener.onStart(info);
EventBus.getDefault().post(info, "onStart");
switch (code) {
case HTTP_OK:
mPreviousTime = System.currentTimeMillis();
dlData(conn);
break;
case HTTP_PARTIAL:
if (info.totalBytes <= 0) {
mPreviousTime = System.currentTimeMillis();
dlData(conn);
break;
}
if (info.isResume) {
mPreviousTime = System.currentTimeMillis();
for (DLThreadInfo threadInfo : info.threads) {
DLManager.getInstance(context).addDLThread(new DLThread(threadInfo, info, this));
}
break;
}
dlDispatch();
break;
}
}