PowerBuilder

Download a Specific GMail Message into a Chilkat Email Object

See more GMail REST API Examples

Demonstrates how to download a GMail message into a Chilkat Email object. PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Http
string ls_Id
string ls_UserId
string ls_Url
oleobject loo_SbJson
oleobject loo_Json
oleobject loo_SbRaw
oleobject loo_Email

li_Success = 0

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

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")
if li_rc < 0 then
    destroy loo_Http
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_Http.AuthToken = "GMAIL-ACCESS-TOKEN"

// The id of the GMail message to download.
ls_Id = "166e50fed0b9b0cb"
ls_UserId = "me"

loo_Http.SetUrlVar("userId","me")
loo_Http.SetUrlVar("id",ls_Id)

// Fetch the email.
ls_Url = "https://www.googleapis.com/gmail/v1/users/{$userId}/messages/{$id}?format=raw"
loo_SbJson = create oleobject
li_rc = loo_SbJson.ConnectToNewObject("Chilkat.StringBuilder")

li_Success = loo_Http.DownloadSb(ls_Url,"utf-8",loo_SbJson)
if li_Success <> 1 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_SbJson
    return
end if

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

loo_Json.LoadSb(loo_SbJson)
loo_Json.EmitCompact = 0

if loo_Http.LastStatus <> 200 then
    Write-Debug loo_Json.Emit()
    Write-Debug "Failed."
    destroy loo_Http
    destroy loo_SbJson
    destroy loo_Json
    return
end if

// The returned JSON contains something like this:

// {
//   "id": "166e50fed0b9b0cb",
//   "threadId": "166e50fed0b9b0cb",
//   "labelIds": [
//     "CATEGORY_SOCIAL",
//     "INBOX"
//   ],
//   "snippet": "...",
//   "historyId": "582477",
//   "internalDate": "1541441317000",
//   "sizeEstimate": 28603,
//   "raw": "BASE64URL_CONTENT"
// }

// The RFC822 MIME of the email is contained in the "raw" as a base64URL encoded string.
// Let's decode and load into a Chilkat email object..
loo_SbRaw = create oleobject
li_rc = loo_SbRaw.ConnectToNewObject("Chilkat.StringBuilder")

loo_Json.StringOfSb("raw",loo_SbRaw)
loo_SbRaw.Decode("base64url","utf-8")

loo_Email = create oleobject
li_rc = loo_Email.ConnectToNewObject("Chilkat.Email")

loo_Email.SetFromMimeSb(loo_SbRaw)

// Now we can use the email API to do whatever we desire..
Write-Debug "From: " + loo_Email.FromAddress
Write-Debug "Subject: " + loo_Email.Subject
// ...


destroy loo_Http
destroy loo_SbJson
destroy loo_Json
destroy loo_SbRaw
destroy loo_Email