(Lianja) Outlook --Download Attachments for a Specific Message

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Demonstrates how to download the attachments for a particular email message.

Note: This example requires Chilkat v9.5.0.67 or greater.

This example applies to: Exchange Online | Office 365 | Hotmail.com | Live.com | MSN.com | Outlook.com | Passport.com

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// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loHttp = createobject("CkHttp")

// Use your previously obtained access token here:
// See the following examples for getting an access token:
//    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
//    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
//    Refresh Access Token (Azure AD v2.0 Endpoint).
//    Refresh Access Token (Azure AD Endpoint).

loHttp.AuthToken = "MICROSOFT_GRAPH_ACCESS_TOKEN"

loSbResponse = createobject("CkStringBuilder")

// Sends:  GET /users/{user_id | userPrincipalName}/messages/{message_id}/attachments
// Note: It is also possible to use the literal string "me" for the current logged-on user.
// For example: GET /me/messages/{message_id}/attachments

loHttp.ClearUrlVars()
loHttp.SetUrlVar("userPrincipalName","chilkatsoft@outlook.com")

// Assume we already have a message ID from previously listing the messages in a folder
lcMessageId = "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2wAAAA=="
loHttp.SetUrlVar("message_id",lcMessageId)

// Send the request to download the attachments.
llSuccess = loHttp.QuickGetSb("https://graph.microsoft.com/v1.0/users/{$userPrincipalName}/messages/{$message_id}/attachments",loSbResponse)
if ((llSuccess <> .T.) and (loHttp.LastStatus = 0)) then
    ? loHttp.LastErrorText
    release loHttp
    release loSbResponse
    return
endif

// The attachment data is contained within the JSON response.
loJson = createobject("CkJsonObject")
loJson.LoadSb(loSbResponse)
loJson.EmitCompact = .F.

? "Status code = " + str(loHttp.LastStatus)
if (loHttp.LastStatus <> 200) then
    ? loJson.Emit()
    ? "Failed."
endif

// This is a sample JSON response.  The code for parsing and extracting/saving the attachments
// is shown below.

// 	{
// 	  "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('chilkatsoft%40outlook.com')/messages('AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2wAAAA%3D%3D')/attachments",
// 	  "value": [
// 	    {
// 	      "@odata.type": "#microsoft.graph.fileAttachment",
// 	      "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2wAAAAESABAAft6wtbaSJU6sgQLi98DI0Q==",
// 	      "lastModifiedDateTime": "2017-05-10T00:30:51Z",
// 	      "name": "fishing.pdf",
// 	      "contentType": "application/pdf",
// 	      "size": 295680,
// 	      "isInline": false,
// 	      "contentId": "F861B218BE380F44B16933097FDDACFC@namprd20.prod.outlook.com",
// 	      "contentLocation": null,
// 	      "contentBytes": "JVBERi0xLjMKJcfsj6 ... yZWYKMjk0MzY5CiUlRU9GCg=="
// 	    },
// 	    {
// 	      "@odata.type": "#microsoft.graph.fileAttachment",
// 	      "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2wAAAAESABAAXS7qXQ-iRUCYXnhJpN8Ihg==",
// 	      "lastModifiedDateTime": "2017-05-10T00:30:51Z",
// 	      "name": "testCert.cer",
// 	      "contentType": "application/octet-stream",
// 	      "size": 1674,
// 	      "isInline": false,
// 	      "contentId": "5E51FA33EF0F8941ACC8260395CB1A33@namprd20.prod.outlook.com",
// 	      "contentLocation": null,
// 	      "contentBytes": "MIIFRjCCBC6gAwIBA ... 7pt3C5w=="
// 	    }
// 	  ]
// 	}

loSbSavePath = createobject("CkStringBuilder")
loAttachData = createobject("CkBinData")
loLastMod = createobject("CkDateTime")
loFac = createobject("CkFileAccess")

i = 0
lnNumMessages = loJson.SizeOfArray("value")
do while i < lnNumMessages
    loJson.I = i

    ? "name: " + loJson.StringOf("value[i].name")
    ? "contentType: " + loJson.StringOf("value[i].contentType")
    lnSizeInBytes = loJson.IntOf("value[i].size")
    ? "size: " + str(lnSizeInBytes)

    // Extract the data and save to a file.
    loSbSavePath.SetString("qa_output/")
    loSbSavePath.Append(loJson.StringOf("value[i].name"))

    loAttachData.Clear()
    loAttachData.AppendEncoded(loJson.StringOf("value[i].contentBytes"),"base64")
    loAttachData.WriteFile(loSbSavePath.GetAsString())

    // Get the last-modified date/time and set the output file's last-mod date/time..
    loLastMod.SetFromTimestamp(loJson.StringOf("value[i].lastModifiedDateTime"))
    loFac.SetLastModified(loSbSavePath.GetAsString(),loLastMod)

    ? "----"

    i = i + 1
enddo

// The output of the above loop is:
// 
// 	name: fishing.pdf
// 	contentType: application/pdf
// 	size: 295680
// 	----
// 	name: testCert.cer
// 	contentType: application/octet-stream
// 	size: 1674
// 	----
// 


release loHttp
release loSbResponse
release loJson
release loSbSavePath
release loAttachData
release loLastMod
release loFac