Question

我正在尝试抓取嵌入式电子邮件中的图片。问题是我保存的图像是不可读的，我无法弄清楚原因。电子邮件（保存为我在代码开头加载的文件）：

MIME-Version: 1.0

Received: by 10.100.120.7 with HTTP; Tue, 18 Oct 2011 10:36:48 -0700 (PDT)

In-Reply-To: <8B4FDE07A4759840B84FD04B4C88100B010135E81D8C@fxildc03.forexmanage.com>

References: <8B4FDE07A4759840B84FD04B4C88100B010135E81D8C@fxildc03.forexmanage.com>

Date: Tue, 18 Oct 2011 19:36:48 +0200

Delivered-To: s.shpiz@gmail.com

Message-ID: <CAEb-As9XVmciajFAwEaFyF8CE4QG0t-Z5zFDDpMWXLqaBur1sA@mail.gmail.com>

Subject: openme

From: Simeon Shpiz <s.shpiz@gmail.com>

To: me <s.shpiz@gmail.com>

Content-Type: multipart/related; boundary=001636c5977303b92404af962ba6



--001636c5977303b92404af962ba6

Content-Type: multipart/alternative; boundary=001636c5977303b91d04af962ba5



--001636c5977303b91d04af962ba5

Content-Type: text/plain; charset=ISO-8859-1



****



--001636c5977303b91d04af962ba5

Content-Type: text/html; charset=ISO-8859-1

Content-Transfer-Encoding: quoted-printable



<div dir=3D"ltr"><div class=3D"gmail_quote"><div lang=3D"EN-US" link=3D"blu=

e" vlink=3D"purple"><div><p class=3D"MsoNormal"><span style=3D"font-size:11=

.0pt;color:#1F497D"><img width=3D"15" height=3D"13" src=3D"cid:image003.png=

@01CC8DCD.30A2A7C0"></span><span style=3D"font-size:11.0pt;color:#1F497D"><=

u></u><u></u></span></p>



</div>

</div></div><br></div>



--001636c5977303b91d04af962ba5--

--001636c5977303b92404af962ba6

Content-Type: image/png; name="image003.png"

Content-Transfer-Encoding: base64

Content-ID: <image003.png@01CC8DCD.30A2A7C0>

X-Attachment-Id: 3e79c375acccec3d_0.1



iVBORw0KGgoAAAANSUhEUgAAAA4AAAANCAIAAAAWvsgoAAAAAXNSR0IArs4c6QAAAAlwSFlzAAAO

yAAADsMBrahYpwAAAItJREFUKFNj/P//PwNxgIk4ZWBVQFOBoBsMsGqrqqr6CgYsaNIPHz6EiMjJ

yb19+xbISE9PLy4uBjLQlSLrFBYWBnITExN9fHyADMJulZCQgOgnrFRUVJRYpXAnETb19evXxJr6

4sULiFJ8IfDt2zegii1btmRkZGBRKi8vjxbSwKjJysoCCjISnwYATtwwhahioZoAAAAASUVORK5C

YII=

--001636c5977303b92404af962ba6--

我正在使用的python代码：

import email
from BeautifulSoup  import BeautifulSoup 

message = email.message_from_file(open(r'C:\shpiz\test\msg\12248'))
cid_list = []
images = []
for part in message.walk():
    if str(part.get_content_type()) == 'text/html':
        soup = BeautifulSoup(part.get_payload(decode=True))
        cid = '<%s>'%soup('img')[0]['src'][4:]
        cid_list.append(cid)

for part in message.walk():
    if part.get('Content-ID') in cid_list :
        images.append((part.get_filename(),part.get_payload(decode=True)))
for name, image in images:
    with open(r'c:\shpiz\test\%s'%name,'w') as f:
        f.write(image)

遗憾的是，保存的图像效果不佳。（没有程序打开它。）

我用notepad ++查看了原始图像文件和新图像文件并且存在差异 - 看起来有一个换行符，我生成的副本不存在于原始文件中。这并不是唯一的区别，因为删除记事本++中的行不会使图像可打开。我所描述的差异可以看作here

非常感谢您在找到问题方面提供的帮助。

Answer 1

您正在以文本模式编写图像，Python正在破坏行结尾。以wb模式打开它，逐字写入。

Answer 2

问题在于：

for name, image in images:
    with open(r'c:\shpiz\test\%s'%name,'w') as f:
        f.write(image)

默认情况下，使用open创建的文件是文本文件。你必须和'w'一起使用'b'。但我不知道这是否能解决整个问题。您可能还需要专门的图形文件读取器/写入器。

使用python将嵌入的图像保存在电子邮件中

2 个答案: