Show Image from get_temporary_link in Apps.

Question

I have specific dropbox folder that will include only one image at all time. My app needs to get this dropbox image and show this image in image element. Whenever dropbox image change, my app needs to reflect this updated image.

I tried to get image using "files_get_temporary_link" API. I've got this json return. when I tried to paste "link" at address bar Ive got 404 error. Could someone tell me what I did wrong. Thank you.
 
Thank you so much.

{
  "metadata": {
    "name": "wallpaper.jpg",
    "path_lower": "/wallpaper.jpg",
    "path_display": "/wallpaper.jpg",
    "id": "id:s6F_A8pbzgAAAAAAAAAALg",
    "client_modified": "2018-07-17T08:57:12Z",
    "server_modified": "2018-07-17T08:57:24Z",
    "rev": "4d32bebe0",
    "size": 155060,
    "content_hash": "0746b8ba94f9672c23845080a01ab613445c5836aed3f445cecb09e7b68a3f71"
  },
  "link": "https://dl.dropboxusercontent.com/apitl/1/AABwcyhWG1ttuYxiN5s5OIYgaqAS86YBnRiQxpzjYNlFEGQhx38LtDIogy6c1wXjGUMVbAmHeSXx_P7bDfWt3-hVTHTBCKBbD-A-SHj0TTQEjEAW3Q8nrN-U-4OsghVsvFUhdMPeV7BCU5fiC_UC2VgrDyjMIV_Ve1072mPEJdR3tTqK-UqFytiHjcolGTapwVJtd0bGUHwNPpYrV0qJas5BZuBDICfs859JQWRBkluMi3dHUHmfFbtV4cgqNnvVomFPG8Gwpm36QQH6MkD_0xGmy-R9BYVXYd46sk3mdpX1Eg"
}

Greg-DB · Accepted Answer

These links do expire after four hours. If you attempt to access an expired link, it will fail.

To be clear though, are you saying the returned link fails less than four hours after it was retrieved?

In general though, if you need to access file data, you should use /2/files/download. It returns the image data directly:

https://www.dropbox.com/developers/documentation/http/documentation#files-download

Or, if you need a long-lived link, you can use /2/sharing/create_shared_link_with_settings:

https://www.dropbox.com/developers/documentation/http/documentation#sharing-create_shared_link_with_settings

That can be modified for different use cases as shown here:

https://www.dropbox.com/help/desktop-web/force-download