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Access_Jim's avatar
Access_Jim
Copper Contributor
Jul 28, 2024

Graph API with Large Attachment Problem

I am attempting to send an EMail via the O365 Graph API with a large attachment.   I am doing this from Access VBA.   I have created an upload session and am attempting to upload the attachment in ch...
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office 365
Access_Jim's avatar
Access_Jim
Copper Contributor
Jul 29, 2024
Using the link you provided, it states: "As part of the response, this action returns an upload URL that you can use in subsequent sequential PUT queries." This is the part where I am having the problem. I have no problem creating the session. I am using https in my code.
Gerrit_Viehmann's avatar
Gerrit_Viehmann
Copper Contributor
Jul 29, 2024

Access_Jim When you get a resonse similar to this:

{
    "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#microsoft.graph.uploadSession",
    "uploadUrl": "https://outlook.office.com/api/gv1.0/users('a8e8e219-4931-95c1-b73d-62626fd79c32@72aa88bf-76f0-494f-91ab-2d7cd730db47')/messages('AAMkAGUwNjQ4ZjIxLTQ3Y2YtNDViMi1iZjc4LTMA=')/AttachmentSessions('AAMkAGUwNjQ4ZjIxLTAAA=')?authtoken=eyJhbGciOiJSUzI1NiIsImtpZCI6IjFTeXQ1bXdXYVh5UFJ",
    "expirationDateTime": "2024-07-30T14:20:12.9708933Z",
    "nextExpectedRanges": [
        "0-"
    ]
}

 You store the value of uploadUrl for later use in PUTs and continue with 2 MiB chunks of the file as an answer similar to this:

PUT https://outlook.office.com/api/gv1.0/users('a8e8e219-4931-95c1-b73d-62626fd79c32@72aa88bf-76f0-494f-91ab-2d7cd730db47')/messages('AAMkAGUwNjQ4ZjIxLTQ3Y2YtNDViMi1iZjc4LTMA=')/AttachmentSessions('AAMkAGUwNjQ4ZjIxLTAAA=')?authtoken=eyJhbGciOiJSUzI1NiIsImtpZCI6IjFTeXQ1bXdXYVh5UFJ
Content-Type: application/octet-stream
Content-Length: 2097152
Content-Range: bytes 0-2097151/9483322
{
  <bytes 0-2097151 of the file to be attached, in binary format>
}

 and so on...

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