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Forum Discussion
getMetadataValue() return null on "shared link already exists", JAVA SDK
I'm trying to implement a function where I can get shared links to dropbox folders via API. I was able to generate the shared link but if the link has been generated, the next call on the same fol...
Hi Thang2000,
Your mistake is that you're expecting Dropbox always returns data for link metadata (i.e. getSharedLinkAlreadyExistsValue() returns valid, non null, value). Unfortunately, returning valid value is something possible and likely, but not mandatory (i.e. it's absolutely normal, data for the existing link to be unavailable immediately in the exception)! If you take a look on "getSharedLinkAlreadyExistsValue"s documentation, there is:
... You can call DbxUserSharingRequests.listSharedLinks(com.dropbox.core.v2.sharing.ListSharedLinksArg) to get the existing link, or use the provided metadata if it is returned. ...
Emphasize of "if it is returned"! So, you have to check always for non null value before further processing. If value is null, as mentioned in documentation, explicit requesting the file/folder link metadata is applicable (the same as if in advance you know that link to the target already exists). 😉 Don't forget to set the target path and denote that you want direct link (otherwise you will need to sort out lot of returned links yourself, not just the targets one).
Hope this helps.
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