我在将图像嵌入电子邮件中时在StackOverflow上看到了这个great question and answer。不幸的是，应答者没有解释如何用边界来分割电子邮件-他说他不知道边界是做什么的。
这是我尝试的:
v_body := '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-15">
</head>
<body bgcolor="#ffffff" text="#000000">
<img src="data:image/jpg;base64,------------090303020209010600070908' || v_image || '------------090303020209010600070908" />
</body>
</html>';
utl_mail.send('myemail.example.com',
'myemail.example.com',
null,
null,
'Image attachment test',
v_body,
'multipart/related; boundary="------------090303020209010600070908"',
null);
它将base64字符串作为原始字符发送，而不是将其转换为图像。
然后，我尝试:
v_body := 'This is a multi-part message in MIME format.
--------------090303020209010600070908
Content-Type: text/html; charset=ISO-8859-15
Content-Transfer-Encoding: 7bit
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-15">
</head>
<body bgcolor="#ffffff" text="#000000">
<img src="cid:part1.06090408.01060107" alt="">
</body>
</html>
--------------090303020209010600070908
Content-Type: image/png;
name="moz-screenshot.png"
Content-Transfer-Encoding: base64
Content-ID: <part1.06090408.01060107>
Content-Disposition: inline;
filename="moz-screenshot.png"
' || v_image || '
--------------090303020209010600070908-- ';
utl_mail.send('myemail.example.com',
'myemail.example.com',
null,
null,
'Image attachment test',
v_body,
'multipart/related; boundary="------------090303020209010600070908"',
null);
电子邮件内容这次不可见。
那么，如何使用Oracle中的边界将具有多部分/相关MIME类型的电子邮件分开？
最佳答案
我已经使用了utl_smtp软件包:
procedure send_email (
p_image blob
)
is
conn utl_smtp.connection;
BOUNDARY VARCHAR2 (256) := '-----090303020209010600070908';
i pls_integer;
len pls_integer;
buff_size pls_integer := 57;
l_raw raw(57);
begin
conn := UTL_SMTP.open_connection (smtp_host, smtp_port);
UTL_SMTP.helo (conn, smtp_domain);
UTL_SMTP.mail (conn, 'myemail@example.com');
UTL_SMTP.rcpt (conn, 'myemail@example.com');
UTL_SMTP.open_data (conn);
UTL_SMTP.write_data (conn, 'From' || ': ' || 'myemail@example.com'|| UTL_TCP.CRLF);
UTL_SMTP.write_data (conn, 'To' || ': ' || 'myemail@example.com'|| UTL_TCP.CRLF);
UTL_SMTP.write_data (conn, 'MIME-Version: 1.0' || CHR (13) || CHR (10));
UTL_SMTP.write_data (conn, 'Content-Transfer-Encoding: 8bit' || CHR (13) || CHR (10));
UTL_SMTP.write_data (conn, 'Subject: image in attachment' || CHR (13) || CHR (10) ) ;
UTL_SMTP.write_data (conn, 'Content-Type: multipart/mixed; boundary="' || BOUNDARY || '"' || UTL_TCP.CRLF);
UTL_SMTP.write_data (conn, 'X-Mailer:Mailer by Oracle UTL_SMTP');
UTL_SMTP.write_data (conn, UTL_TCP.CRLF);
UTL_SMTP.write_data (conn, 'This is a multi-part message in MIME format.' || UTL_TCP.crlf);
UTL_SMTP.write_data (conn, '--' || BOUNDARY || UTL_TCP.CRLF );
UTL_SMTP.write_data (conn, 'Content-Type: text/html; charset="windows-1251"'|| UTL_TCP.CRLF );
UTL_SMTP.write_data (conn, UTL_TCP.CRLF);
UTL_SMTP.write_data (conn, 'put your html code here');
UTL_SMTP.write_data (conn, UTL_TCP.CRLF);
UTL_SMTP.write_data (conn, '--' || BOUNDARY || UTL_TCP.CRLF );
UTL_SMTP.write_data (conn, 'Content-Type: image/jpeg;'|| UTL_TCP.CRLF );
UTL_SMTP.write_data (conn, 'Content-Disposition: inline; filename="image.jpg"' || UTL_TCP.CRLF);
UTL_SMTP.write_data (conn, 'Content-Transfer-Encoding' || ': ' || 'base64' || UTL_TCP.CRLF);
UTL_SMTP.write_data (conn, 'Content-ID: <part1.06090408.01060107>');
UTL_SMTP.write_data (conn, UTL_TCP.CRLF);
UTL_SMTP.write_data (conn, UTL_TCP.CRLF);
i := 1;
len := dbms_lob.getlength(p_image);
while i < len
loop
dbms_lob.read(p_image, buff_size, i, l_raw);
utl_smtp.write_raw_data(conn, utl_encode.base64_encode(l_raw));
utl_smtp.write_data(conn, utl_tcp.crlf);
i := i + buff_size;
end loop;
utl_smtp.write_data(conn, utl_tcp.crlf);
UTL_SMTP.write_data (conn, '--' || BOUNDARY || '--' || UTL_TCP.CRLF);
UTL_SMTP.write_data (conn, UTL_TCP.CRLF);
UTL_SMTP.close_data (conn);
UTL_SMTP.quit (conn);
结束;
关于image - 如何使用边界分割具有多部分/相关MIME类型的电子邮件？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9566662/