(Go) Download a Specific GMail Message into a Chilkat Email Object

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

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    var success bool

    http := chilkat.NewHttp()
    http.SetAuthToken("GMAIL-ACCESS-TOKEN")

    // The id of the GMail message to download.
    id := "166e50fed0b9b0cb"
    userId := "me"

    http.SetUrlVar("userId","me")
    http.SetUrlVar("id",id)

    // Fetch the email.
    url := "https://www.googleapis.com/gmail/v1/users/{$userId}/messages/{$id}?format=raw"
    sbJson := chilkat.NewStringBuilder()
    success = http.DownloadSb(url,"utf-8",sbJson)
    if success != true {
        fmt.Println(http.LastErrorText())
        http.DisposeHttp()
        sbJson.DisposeStringBuilder()
        return
    }

    json := chilkat.NewJsonObject()
    json.LoadSb(sbJson)
    json.SetEmitCompact(false)

    if http.LastStatus() != 200 {
        fmt.Println(*json.Emit())
        fmt.Println("Failed.")
        http.DisposeHttp()
        sbJson.DisposeStringBuilder()
        json.DisposeJsonObject()
        return
    }

    // 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..
    sbRaw := chilkat.NewStringBuilder()
    json.StringOfSb("raw",sbRaw)
    sbRaw.Decode("base64url","utf-8")

    email := chilkat.NewEmail()
    email.SetFromMimeSb(sbRaw)

    // Now we can use the email API to do whatever we desire..
    fmt.Println("From: ", email.FromAddress())
    fmt.Println("Subject: ", email.Subject())
    // ...

    http.DisposeHttp()
    sbJson.DisposeStringBuilder()
    json.DisposeJsonObject()
    sbRaw.DisposeStringBuilder()
    email.DisposeEmail()