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php - Apple Mail 无法从 PHP 正确显示附件

转载 作者:可可西里 更新时间:2023-10-31 23:02:07 25 4
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我正在尝试从 Opencart 发送带有附件的 HTML 电子邮件。有一个内置函数 $mail->addAttachment。一切都很好,除了附件位置是 Apple Mail 中的一个白框。在 iOs 邮件应用程序中,附件根本不显示。在 GMail 上没问题:

enter image description here

附件在 Apple Mail 中也可用,因为如果我双击白色区域,附件就会打开。

这是邮件的来源,在 GMail 中打开(我删除了 X 个标题):

X-Mailer: PHP/5.4.39-0+deb7u2
Content-Type: multipart/related; boundary="----=_NextPart_fefb9509ef8523a96a17066ecf8472c8"

------=_NextPart_fefb9509ef8523a96a17066ecf8472c8
Content-Type: multipart/alternative; boundary="----=_NextPart_fefb9509ef8523a96a17066ecf8472c8_alt"

------=_NextPart_fefb9509ef8523a96a17066ecf8472c8_alt
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit

Some text (text/plain)


------=_NextPart_fefb9509ef8523a96a17066ecf8472c8_alt
Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: 8bit

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Test title</title>
</head>
<body>
<p>Some html text(text/html)</p>
</body>
</html>

------=_NextPart_fefb9509ef8523a96a17066ecf8472c8_alt--
------=_NextPart_fefb9509ef8523a96a17066ecf8472c8
Content-Type: application/pdf; name="form.pdf"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="form.pdf"
Content-ID <%2Fhome%2Fhtml%2Fdownload%2form.pdf>
X-Attachment-Id: %2Fhome%2Fhtml%2Fdownload%2form.pdf


JVBERi0xLjMKJcTl8uXrp/Og0MTGCjQgMCBvYmoKPDwgL0xlbmd0aCA1IDAgUiAvRmlsdGVyIC9G
bGF0ZURlY29kZSA+PgpzdHJlYW0KeAGdW0tzHLcRvs+vQGInGbqk0bwfuTl2qqKkbMkRk1Q58mFJ
jkJylzvS7pIu8Q/o5oMuLlfpmB+Un5SvHwDmtdylSyXNAgM0uhuN7q8bo3fmO/POxPhTNIWp89Rs
WvMvszbPvtom5nxrEv6zPccIenvjxq34V2xWPHsVXJo3TCtLoiYr49ykdZQVpsjqqKqqxlR1GWWW
+jtQpUUTk5WmKjNzfmP+dGr+fAoStHKAlel9bLCyH1ympspqHRxHcRwn5vTcJDkP1cfpjXl2ekp8
...
------=_NextPart_fefb9509ef8523a96a17066ecf8472c8--

来自/system/library/mail.php 的相关部分:

foreach ($this->attachments as $attachment) {
if (file_exists($attachment)) {
$handle = fopen($attachment, 'r');

$content = fread($handle, filesize($attachment));

fclose($handle);

$message .= '--' . $boundary . $this->newline;
$message .= 'Content-Type: application/pdf; name="' . basename($attachment) . '"' . $this->newline;
$message .= 'Content-Transfer-Encoding: base64' . $this->newline;
$message .= 'Content-Disposition: attachment; filename="' . basename($attachment) . '"' . $this->newline;
$message .= 'Content-ID: <' . basename(urlencode($attachment)) . '>' . $this->newline;
$message .= 'X-Attachment-Id: ' . basename(urlencode($attachment)) . $this->newline . $this->newline;
$message .= chunk_split(base64_encode($content));
}
}

编辑:

我刚刚意识到 Content-ID 和 X-Attachment-Id 是问题所在:

basename(urlencode($attachment)

应该是:

urlencode(basename($attachment))

它现在在 Apple Mail 中工作正常,但在 iOS (iPhone/iPad) 上仍然缺少附件。有什么想法吗?

最佳答案

标题必须是这样的:

MIME-Version: 1.0 
Content-Type: multipart/alternative; boundary=boundary42

在大多数情况下发现缺少 mime 版本标记。你边界有误我先给规则body of a multipart entity有语法(只有重要部分):

 multipart-body := [preamble CRLF]
dash-boundary transport-padding CRLF
body-part *encapsulation
close-delimiter transport-padding
[CRLF epilogue]
dash-boundary := "--" boundary
encapsulation := delimiter transport-padding
CRLF body-part
delimiter := CRLF dash-boundary
close-delimiter := delimiter "--"

前面的 -- 对于消息中使用的每个边界都是强制性的,尾随 -- 对于结束边界是强制性的(close-delimiter).所以一个包含三个 body 部分的多部分 body ,边界作为边界可以看起来像这样:

--boundary42 
Content-Type: text/plain; charset=us-ascii

...plain text version of message goes here....

--boundary42
Content-Type: text/richtext

.... richtext version of same message goes here ...

--boundary42
Content-Type: text/x-whatever

.... fanciest formatted version of same message goes here...

--boundary42--

阅读文档RFC

关于php - Apple Mail 无法从 PHP 正确显示附件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38617579/

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