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An answered question at StackOverflow suggests that adding html-markup to the body of the email will do the trick. Is that solution correct?
But what if the recipient's email server/client does not support HTML email?
E.g. when using Apache commons email, I do the following:
// set the html message
email.setHtmlMsg("<html>Our logo - <img src=\"cid:"+cid+"\"></html>");
// set the alternative message
email.setTextMsg("Your email client does not support HTML messages");
Is there any way to tell Gmail API what email to fall back to if the recipient email server/client does not support HTML?
P.S. I'm especially interested in Java code samples.
Thanks
754
To give two alternatives, you can set the Content-Type to mixed/alternative instead of either text/plain or text/html:
If we want to try this out in the API explorer, we just Base64-encode the mail, and make it url-safe by replacing all / with _ and all + with -.
In the Developer Console:
btoa(
"Subject: Example Subject\r\n" +
"From: <[email protected]>\r\n" +
"To: <[email protected]>\r\n" +
"Content-Type: multipart/alternative; boundary=\"foo_bar\"\r\n\r\n" +
"--foo_bar\r\n" +
"Content-Type: text/plain; charset=UTF-8\r\n\r\n" +
"*Bold example message text*\r\n\r\n" +
"--foo_bar\r\n" +
"Content-Type: text/html; charset=UTF-8\r\n\r\n" +
"<div dir=\"ltr\"><b>Bold example message text</b></div>\r\n\r\n" +
"--foo_bar--"
).replace(/\+/g, '-').replace(/\//g, '_');
POST https://www.googleapis.com/gmail/v1/users/me/messages/send?access_token={YOUR_API_KEY}
{
"raw": "U3ViamVjdDogRXhhbXBsZSBTdWJqZWN0DQpGcm9tOiA8ZXhhbXBsZUBnbWFpbC5jb20-DQpUbzogPGV4YW1wbGVAZ21haWwuY29tPg0KQ29udGVudC1UeXBlOiBtdWx0aXBhcnQvYWx0ZXJuYXRpdmU7IGJvdW5kYXJ5PSJmb29fYmFyIg0KDQotLWZvb19iYXINCkNvbnRlbnQtVHlwZTogdGV4dC9wbGFpbjsgY2hhcnNldD1VVEYtOA0KDQoqQm9sZCBleGFtcGxlIG1lc3NhZ2UgdGV4dCoNCg0KLS1mb29fYmFyDQpDb250ZW50LVR5cGU6IHRleHQvaHRtbDsgY2hhcnNldD1VVEYtOA0KDQo8ZGl2IGRpcj0ibHRyIj48Yj5Cb2xkIGV4YW1wbGUgbWVzc2FnZSB0ZXh0PC9iPjwvZGl2Pg0KDQotLWZvb19iYXItLQ=="
}
To do the equivalent in Java, you could do:
Message message = new MimeMessage(session);
Multipart multiPart = new MimeMultipart("alternative");
MimeBodyPart textPart = new MimeBodyPart();
textPart.setText(text, "utf-8");
MimeBodyPart htmlPart = new MimeBodyPart();
htmlPart.setContent(html, "text/html; charset=utf-8");
multiPart.addBodyPart(textPart);
multiPart.addBodyPart(htmlPart);
message.setContent(multiPart);
ByteArrayOutputStream output = new ByteArrayOutputStream();
message.writeTo(output);
String rawEmail = Base64.encodeBase64URLSafeString(output.toByteArray());
Message message = new Message();
message.setRaw(rawEmail);
message = service.users().messages().send(userId, message).execute();
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