xpage-csjs代码没有通过gmailapi以正确格式的电子邮件发送内联图像和附件

我的xpage有以下字段

1. 带有evo:InputRichtext的Xpage来自以下片段：
2. 我正在使用gmailapi发送电子邮件
3. 我正在Ckeditor中添加格式化文本、内联图像和文件
4. 使用按钮使用csjs从to、Subject和Ckeditor组件中获取值
5. 通过gmail服务器发送的消息，但未接收到wysiwyg格式。不显示图像，只显示文件名

我知道这是跨平台编码的问题，我不知道那是什么。

这是按钮代码：

var to = XSP.getElementById("#{id:To}").value;
var subject = XSP.getElementById("#{id:Subject}").value;
var richCKEditor = CKEDITOR.instances["#{id:inputRichText1}"]; 
var dt=richCKEditor.getData();
var content = richCKEditor.dataProcessor.toHtml(dt);
 console.log(to);
 console.log(subject);
 console.log(content);
var email ="From: 'm' <"+to+">'r'n"+
"To:  "+ to +"'r'n"+
"Subject: "+subject+"'r'n"+"'r'n"+
"MIME-Version: 1.0'n"+
//"Content-Type:  text/html; charset='"UTF-8'"'n" +
"Content-Type:  multipart/mixed; 'n" +
content;
console.log(email);
auth();
send(email);

这里是我使用的gmailapi功能与来自gmailapi站点的现有身份验证

function send(email) {
console.log(email);
sendMessage(email, function (response) {
                //console.log("Handed to Gmail API for sending");
                 {console.log(response)}
            });
            alert("Message sent");
        }
 function sendMessage(email, callback) {
            //auth();
            gapi.client.load('gmail', 'v1',function(){
                var base64EncodedEmail = btoa("MIME-Version: 1.0'n"+
                        "Content-Type:  text/html; charset='"UTF-8'"'n" +
                    //  "Content-Type:  multipart/mixed; 'n" +
                        //"Content-length: 5000'n" +
                        //"Content-Transfer-Encoding: message/rfc822'n"+
                        email).replace(/'//g,'_').replace(/'+/g,'-');
                 // alert("Message sending'n" + base64EncodedEmail.toString());
                console.log(base64EncodedEmail);
                  var request = gapi.client.gmail.users.messages.send({
                    'userId': 'me',
                    'resource': {
                      'raw': base64EncodedEmail
                    }
                  });
                  request.execute(callback);
            });

        }