我可以解析保存为文本文件的电子邮件并使用 Perl 检索/保存其附件吗？

发布于 2024-10-04 14:37:42 字数 908 浏览 9 评论 0原文

我正在使用 Perl & MAIL::IMAPClient 保存来自的电子邮件使用 IMAPClient 方法将 Gmail 作为 .txt 文件：

message_to_file

这些文件似乎包含编码为文本的电子邮件附件。

这是一些文本文件：

--0015174c1274ee7ca60495ca69d5
Content-Type: video/3gpp; name="20101112233055.3gp"
Content-Disposition: attachment; filename="20101112233055.3gp"
Content-Transfer-Encoding: base64
X-Attachment-Id: 1353288501407252480-1

AAAAHGZ0eXAzZ3A0AAADADNncDRtcDQxM2dwNgAFHyltZGF0AAABthAwrMK9/Mue7fM+95wsf9P8
WI7mPzzp/ikijbucv72j7OywVGuh5kBzo89Zra6PihxZg0zadDqihZFpsPJeG36Ihk9qZW+LLQ2u
NEd96vsqgpnLFnhhwGBWgL2Xpt0cXkW....[A LOT MORE CHARS]....AAAQAAAALAAAAAQAAABRzdHN6
AAAAAAAAACAAAAChAAAAIHN0Y28AAAAAAAAABAABHNoAASMaAALYFwAFHeU=
--0015174c1274ee7ca60495ca69d5--

我找不到任何单独保存附件的方法。有没有办法通过解析来做到这一点？

原文

I'm using Perl & MAIL::IMAPClient to save emails from Gmail as .txt files using the IMAPClient method:

message_to_file

These files seem to contain the attachments of emails encoded as text.

Here's some of the text file:

--0015174c1274ee7ca60495ca69d5
Content-Type: video/3gpp; name="20101112233055.3gp"
Content-Disposition: attachment; filename="20101112233055.3gp"
Content-Transfer-Encoding: base64
X-Attachment-Id: 1353288501407252480-1

AAAAHGZ0eXAzZ3A0AAADADNncDRtcDQxM2dwNgAFHyltZGF0AAABthAwrMK9/Mue7fM+95wsf9P8
WI7mPzzp/ikijbucv72j7OywVGuh5kBzo89Zra6PihxZg0zadDqihZFpsPJeG36Ihk9qZW+LLQ2u
NEd96vsqgpnLFnhhwGBWgL2Xpt0cXkW....[A LOT MORE CHARS]....AAAQAAAALAAAAAQAAABRzdHN6
AAAAAAAAACAAAAChAAAAIHN0Y28AAAAAAAAABAABHNoAASMaAALYFwAFHeU=
--0015174c1274ee7ca60495ca69d5--

I can't find any method that will save the attachment separately. Is there any way to do this via parsing?

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世界如花海般美丽 2024-10-11 14:37:42

您得到的是 MIME 编码的电子邮件的原始文本。大多数语言都有一个通用 MIME 库来解析这些内容。在 CPAN 上快速搜索发现
MIME::Parser 可能可以解决问题：

use MIME::Parser;

open(FH, '/var/tmp/test.txt');
my $parser = new MIME::Parser;
my $entity = $parser->parse(\*FH) or die;

$entity->dump_skeleton;

这会将纯文本文件 test.txt 中存储的电子邮件的各个部分转储到 /var/tmp。查看 MIME::Parser 文档以获取更多选项。

What you've got there is the raw text of a MIME-encoded email message. Most languages have a general purpose MIME library for parsing these. A quick search on CPAN reveals that
MIME::Parser might do the trick:

use MIME::Parser;

open(FH, '/var/tmp/test.txt');
my $parser = new MIME::Parser;
my $entity = $parser->parse(\*FH) or die;

$entity->dump_skeleton;

This will dump the various parts of the email stored in the plain text file test.txt to /var/tmp. Check out the MIME::Parser docs for further options.

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临风闻羌笛 2024-10-11 14:37:42

这是一个解决方法的建议。在经过标题之后，您将使用此逻辑。

use MIME::Base64;

my $attachlines = '';
while ( <$input> ) { 
    last if index( $_, '--0015174c1274ee7ca60495ca69d5--' ) == 0;
    $attachlines .= $_;
}

my $attach = MIME::Base64::decode( $attachlines );

注意：我想当然地认为您知道 MIME 多部分表单的工作原理，因此我不讨论如何以编程方式获取分隔符'--0015174c1274ee7ca60495ca69d5--' 。

This is a suggestion for a workaround. You would engage this logic after you were past the headers.

use MIME::Base64;

my $attachlines = '';
while ( <$input> ) { 
    last if index( $_, '--0015174c1274ee7ca60495ca69d5--' ) == 0;
    $attachlines .= $_;
}

my $attach = MIME::Base64::decode( $attachlines );

Note: I take for granted that you know how MIME multi-part forms work, so I don't discuss how to programmatically get the divider '--0015174c1274ee7ca60495ca69d5--'.

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