How to get the file URL from file name in Google Sheets with correct Authorization via custom function/script

Question

I would like to create a custom function that pulls a Drive URL from a file name in Google Sheets.

So, using the code below:

1. If I have a valid file nam

Answer 1

@I'-'I's answer is correct. Although I'm not sure whether this is what you want, how about this workaround? I have also experienced the same issue. At that time, I had used the following workaround.

• Set and get access token using PropertiesService.

The flow is as follows.

Flow:

1. Set access token every 1 hour by the time-driven trigger.
   • By this, the access token is updated every 1 hour. Because the expiration time of access token is 1 hour.
2. When the custom function is run, it gets the access token using PropertiesService.
   • By this, the access token can be used.

Modified script:

Please install this function as the time-driven trigger. Of course, you can run manually this function.

function setAccessToken() {
  PropertiesService.getScriptProperties().setProperty("accessToken", ScriptApp.getOAuthToken());
}

In your script, please modify as follows.

From:

var params = {
  method: "GET",
  headers: {"Authorization": "Bearer " + ScriptApp.getOAuthToken()},
  muteHttpExceptions: true
};

To:

var params = {
  method: "GET",
  headers: {"Authorization": "Bearer " + PropertiesService.getScriptProperties().getProperty("accessToken")},
  muteHttpExceptions: true
};

Note:

• In this case, the owner of access token is the owner of project.
• I think that this can be also used by CacheService.

Reference:

• PropertiesService