(Go) SendGrid -- Send Email with Attachment

See more SendGrid Examples

Sends an email with an attachment.

For more information, see https://sendgrid.com/docs/for-developers/sending-email/curl-examples/#sending-a-basic-email-with-attachment

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

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

    http := chilkat.NewHttp()
    var success bool

    // Implements the following CURL command:

    // curl --request POST \
    //   --url https://api.sendgrid.com/v3/mail/send \
    //   --header 'authorization: Bearer YOUR_API_KEY' \
    //   --header 'Content-Type: application/json' \
    //   --data '{"personalizations": [{"to": [{"email": "recipient@example.com"}]}],"from": {"email": "sender@example.com"},"subject":"Hello, World!","content": [{"type": "text/html","value": "Hey,<br>Please find attachment."}], "attachments": [{"content": "BASE64_ENCODED_CONTENT", "type": "text/plain", "filename": "attachment.txt"}]}'

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    // The following JSON is sent in the request body.

    // {
    //   "personalizations": [
    //     {
    //       "to": [
    //         {
    //           "email": "recipient@example.com"
    //         }
    //       ]
    //     }
    //   ],
    //   "from": {
    //     "email": "sender@example.com"
    //   },
    //   "subject": "Hello, World!",
    //   "content": [
    //     {
    //       "type": "text/html",
    //       "value": "Hey,<br>Please find attachment."
    //     }
    //   ],
    //   "attachments": [
    //     {
    //       "content": "BASE64_ENCODED_CONTENT",
    //       "type": "text/plain",
    //       "filename": "attachment.txt"
    //     }
    //   ]
    // }

    json := chilkat.NewJsonObject()
    json.UpdateString("personalizations[0].to[0].email","recipient@example.com")
    json.UpdateString("from.email","sender@example.com")
    json.UpdateString("subject","Hello, World!")
    json.UpdateString("content[0].type","text/html")
    json.UpdateString("content[0].value","Hey,<br>Please find attachment.")

    // Load a file to be attached.
    bd := chilkat.NewBinData()
    success = bd.LoadFile("qa_data/pdf/hello.pdf")

    json.UpdateString("attachments[0].content",*bd.GetEncoded("base64"))
    json.UpdateString("attachments[0].type","application/pdf")
    json.UpdateString("attachments[0].filename","hello.pdf")

    http.SetRequestHeader("Content-Type","application/json")
    // Adds the "Authorization: Bearer YOUR_API_KEY" header.
    http.SetAuthToken("YOUR_API_KEY")

    resp := http.PostJson3("https://api.sendgrid.com/v3/mail/send","application/json",json)
    if http.LastMethodSuccess() == false {
        fmt.Println(http.LastErrorText())
        http.DisposeHttp()
        json.DisposeJsonObject()
        bd.DisposeBinData()
        return
    }

    respStatusCode := resp.StatusCode()
    fmt.Println("Response Status Code = ", respStatusCode)
    if respStatusCode != 202 {
        fmt.Println("Response Header:")
        fmt.Println(resp.Header())
        fmt.Println("Response Body:")
        fmt.Println(resp.BodyStr())
        fmt.Println("Failed.")
        resp.DisposeHttpResponse()
        http.DisposeHttp()
        json.DisposeJsonObject()
        bd.DisposeBinData()
        return
    }

    resp.DisposeHttpResponse()
    fmt.Println("Success.")

    http.DisposeHttp()
    json.DisposeJsonObject()
    bd.DisposeBinData()