Graph API Calender Event Web Link has wrong encoding

Question

I am using the following Graph API endpoint:
GET https://graph.microsoft.com/v1.0/me/calendar/calendarView

The response contains events in the following format:
{
...
"id": "AAMkADZjMDVjNGY5LWUwMWQtNDRlMC05MTNmLTNjOWJmZjM1YjY4OQFRAAgI2mt1HuTAAEYAAAAAp32JOAzZfUqe3sNF-R569AcAjguvQoXmFUOqtPWAHs7uqgAAAAABDQAAjguvQoXmFUOqtPWAHs7uqgAANfM_SAAAEA==",
"webLink": "https://outlook.office365.com/owa/?itemid=AAMkADZjMDVjNGY5LWUwMWQtNDRlMC05MTNmLTNjOWJmZjM1YjY4OQFRAAgI2mt1HuTAAEYAAAAAp32JOAzZfUqe3sNF%2FR569AcAjguvQoXmFUOqtPWAHs7uqgAAAAABDQAAjguvQoXmFUOqtPWAHs7uqgAANfM%2BSAAAEA%3D%3D&exvsurl=1&path=/calendar/item",
...
}

As we can see the webLink property also contains the event ID, but is encoded.
When I use the following function to decode the webLink property:

window.decodeURIComponent('https://outlook.office365.com/owa/?itemid=AAMkADZjMDVjNGY5LWUwMWQtNDRlMC05MTNmLTNjOWJmZjM1YjY4OQFRAAgI2mt1HuTAAEYAAAAAp32JOAzZfUqe3sNF%2FR569AcAjguvQoXmFUOqtPWAHs7uqgAAAAABDQAAjguvQoXmFUOqtPWAHs7uqgAANfM%2BSAAAEA%3D%3D&exvsurl=1&path=/calendar/item')

I receive:
https://outlook.office365.com/owa/?itemid=AAMkADZjMDVjNGY5LWUwMWQtNDRlMC05MTNmLTNjOWJmZjM1YjY4OQFRAAgI2mt1HuTAAEYAAAAAp32JOAzZfUqe3sNF/R569AcAjguvQoXmFUOqtPWAHs7uqgAAAAABDQAAjguvQoXmFUOqtPWAHs7uqgAANfM+SAAAEA==&exvsurl=1&path=/calendar/item

When you compare this result with the original event ID you can see, that the result is different.

• instead of _
  / instead of -
  etc.

So it seems that the webLink is encoded wrong.
Has anyone experienced the same?
If my assumption is correct where can I report this bug?

Thank you in advance.

Answer 1

Hi @JO-5324 ,

I am able to replicate this scenario. It seems to be by design and not a bug as we are able to access the event using webLink from the response.

Hope this helps.

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Answer 2

It seems that MS is using web safe bas64 encoding, this is the cause for some different characters.