Google Drive API - List Permissions of a file

Question

I am using the list permissions endpoint (https://developers.google.com/drive/api/v3/reference/permissions/list) to get all the permissions for a file that exists in a shared drive.

I am running into an issue with a file I have that lives in a shared drive. The file has 100 permissions. The max limit on the number of permissions returned for a shared drive file is 100, so I should only need to make one request to get all the permissions for the file and the API should not return a next page token.

But this is not the behaviour I am experiencing, after the first request I continuously get the same next page token back from the API.

So for the following code below (written in go), I get into an infinite loop, since I continuously get the same next page token back.

var permissionService PermissionsService := getPermissionsService() fileID := "1234abcd" nextPageToken := "" anotherPage := true permissions := []*Permission{} for anotherPage { result, err := permissionService. List(fileID). SupportsAllDrives(true). SupportsTeamDrives(false). Fields("*"). PageSize(100). Do() if err != nil { panic(err) } anotherPage = result.NextPageToken != "" nextPageToken = result.NextPageToken permissions = append(permissions, result.Permissions...) } fmt.Println("Permissions", permissions)

Am I supposed to account for this case in my code? From the documentation, this is never mentioned so I assume this is not supposed to happen.

Kristkun · Accepted Answer · 2021-01-05 20:15:13Z

It seems that you did not add the PageToken parameter in your permissionService. You are actually requesting the same first 100 results of the permission service.

Not familiar with the language but something like this

for anotherPage { result, err := permissionService. List(fileID). SupportsAllDrives(true). SupportsTeamDrives(false). Fields("*"). PageSize(100). PageToken(nextPageToken). Do() if err != nil { panic(err) } anotherPage = result.NextPageToken != "" nextPageToken = result.NextPageToken permissions = append(permissions, result.Permissions...) }

Can you also verify first if the result.NextPageToken will return "" if the file has < 100 results, I used API explorer and Apps Script to access this API and the nextPageToken is not part of the response body when permission list is less than the pageSize.

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