无法从eml文件下载所有文档

Question

我有一个包含3个附件的.eml文件。我能够下载其中一个附件，但无法下载所有附件。

import os
import email
import base64
# Get list of all files
files = [f for f in os.listdir('.') if os.path.isfile(f)]
# Create output directory
if os.path.exists("output"):
    pass
else:
    os.makedirs("output")

for eml_file in files:
    if eml_file.endswith(".eml"):
        with open(eml_file) as f:
            email = f.read()

        ext=".docx"

        if ext is not "":
            # Extract the base64 encoding part of the eml file
            encoding = email.split(ext+'"')[-1]
            if encoding:
                # Remove all whitespaces
                encoding = "".join(encoding.strip().split())
                encoding = encoding.split("=", 1)[0]
                # Convert base64 to string
                if len(encoding) % 4 != 0: #check if multiple of 4
                   while len(encoding) % 4 != 0:
                       encoding = encoding + "="
                try:
                    decoded = base64.b64decode(encoding)
                except:
                    print(encoding)
                    for i in range(100):
                        print('\n')
                # Save it as docx
                path = os.path.splitext(eml_file)[0]
                if path:
                    path = os.path.join("output", path + ext)
                    try:
                        os.remove(path)
                    except OSError:
                        pass
                    with open(path, "wb") as f:
                        f.write(decoded)
        else:
            print("File not done: " + eml_file)

如何下载所有附件？编辑:我已经初始化了eml_file，但还没有下载所有文件。

Answer 1

导入email模块。那么，你为什么要忽略它，自己写一个电子邮件解析器呢？此外：

1. 您可以使用glob列出所有具有给定扩展名的文件。
2. use应该在以下条件下使用not操作符：(if not os.path.exists("output"): os.makedirs("output"))，但即使这样也没有必要，因为makedirs有exist_ok参数。H 210G 211

import os
import glob
import email
from email import policy

indir = '.'
outdir = os.path.join(indir, 'output')

os.makedirs(outdir, exist_ok=True)
files = glob.glob(os.path.join(indir, '*.eml'))

for eml_file in files:
    # This will not work in Python 2
    msg = email.message_from_file(open(eml_file), policy=policy.default)
    for att in msg.iter_attachments():
        # Tabs may be added for indentation and not stripped automatically
        filename = att.get_filename().replace('\t', '')
        # Here we suppose for simplicity sake that each attachment has a valid unique filename,
        # which, generally speaking, is not true.
        with open(os.path.join(outdir, filename), 'wb') as f:
            f.write(att.get_content())