阻止gmail将内嵌图像显示为附件

Question

阻止gmail将内嵌图像显示为附件

我正在使用弹簧样本发送内嵌图像.它有效但gmail也将图像显示为附件.怎么避免呢？

代码非常简单.

public class Email {

    public static  MimeMessagePreparator getContentAsInlineResourceMessagePreparator(final String to) {

        MimeMessagePreparator preparator = new MimeMessagePreparator() {

            public void prepare(MimeMessage mimeMessage) throws Exception {
                MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true, "UTF-8");

                helper.setSubject("Email with inline image");
                helper.setFrom("fake@yourshop.com");
                helper.setTo(to);

                String content = "Dear pedrofb...";
                helper.setText("<html><body><p>" + content + "</p><img src='cid:company-logo'></body></html>", true);
                helper.addInline("company-logo", new ClassPathResource("logo.png"));
            }
        };
        return preparator;
    }
    public final static void main (String argv[]){
        //Basic SMTP configuration
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
        mailSender.setHost(host);
        mailSender.setPort(port);

        MimeMessagePreparator preparator = getContentAsInlineResourceMessagePreparator("myemail@gmail.com");            
        mailSender.send(preparator);
    }

}

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我的问题类似于如何阻止电子邮件中的嵌入图像被GMail显示为附件？但答案很老,并没有说明如何正确配置弹簧.我不想自己构建消息部分和标题

在pastebin中发布原始消息

Answer 1

Tar*_*ani 11

问题是MimeType坚定的

此png扩展程序被视为image/x-png代替image/png此问题导致Gmail出现问题.这已被修复/更改,5.X也可能在某些4.X更高版本中(我不确定).但修复很容易.更改

MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true, "UTF-8");

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至

MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true, "UTF-8") {

    @Override
    public void addInline(String contentId, Resource resource) throws MessagingException {
        Assert.notNull(resource, "Resource must not be null");
        String contentType = this.getFileTypeMap().getContentType(resource.getFilename());
        contentType = contentType.replace("x-png", "png");
        this.addInline(contentId, resource, contentType);

    }
};

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它会覆盖MimeType到image/png

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