py 收邮件

import poplib
import sys
from importlib import reload
from email.parser import Parser
from email.parser import BytesParser
from email.header import decode_header
from email.utils import parseaddr
import email.iterators

#解析消息头中的字符串
def decode_str(s):
    value, charset = decode_header(s)[0]
    if charset:
        value = value.decode(charset)
    return value

#将邮件附件或内容保存至文件
#即邮件中的附件数据写入附件文件
def savefile(filename, data, path):
    try:
        filepath = path + filename
        print('Save as: ' + filepath)
        f = open(filepath, 'wb')
    except:
        print(filepath + ' open failed')
        #f.close()
    else:
        f.write(data)
        f.close()

#获取邮件的字符编码，首先在message中寻找编码，如果没有，就在header的Content-Type中寻找
def guess_charset(msg):
    charset = msg.get_charset()
    if charset is None:
        content_type = msg.get('Content-Type', '').lower()
        pos = content_type.find('charset=')
        if pos >= 0:
            charset = content_type[pos+8:].strip()
    return charset

#解析邮件的函数，首先打印收件人、发件人、标题
#然后调用message的walk循环处理邮件中的每一个子对象（包括文本、html、附件一次或多次）
#邮件头属性中的filename存在则该子对象是附件，对附件名称进行编码并将附件下载到指定目录
#由于网络上传输的邮件都是编码以后的格式，需要在get_payload的时候指定decode=True来转换成可输出的编码
#如果邮件是text或者html格式，打印格式并输出转码以后的子对象内容
def print_info(msg):
    for header in ['From', 'To', 'Subject']:
        value = msg.get(header, '')
        if value:
            if header == 'Subject':
                value = decode_str(value)
            else:
                hdr, addr = parseaddr(value)
                name = decode_str(addr)
                value = name + ' < ' + addr + ' > '
        print(header + ':' + value)
    for part in msg.walk():
        filename = part.get_filename()
        content_type = part.get_content_type()
        charset = guess_charset(part)
        if filename:
            filename = decode_str(filename)
            data = part.get_payload(decode = True)
            if filename != None or filename != '':
                print('Accessory: ' + filename)
                savefile(filename, data, mypath)
        else:
            email_content_type = ''
            content = ''
            if content_type == 'text/plain':
                email_content_type = 'text'
            elif content_type == 'text/html':
                email_content_type = 'html'
            if charset:
                content = part.get_payload(decode=True).decode(charset)
            print(email_content_type + ' ' + content)

email = r'test@qq.com'
password = r'password'
pop3_server = r'pop.qq.com'
mypath = 'D://email/'

server = poplib.POP3(pop3_server, 110)
#print(server.getwelcome())
server.user(email)
server.pass_(password)
print('Message: %s. Size: %s' % server.stat())

resp, mails, objects = server.list()
#print(mails)
index = len(mails)
#取出某一个邮件的全部信息
resp, lines, octets = server.retr(index)
#邮件取出的信息是bytes，转换成Parser支持的str
lists = []
for e in lines:
    lists.append(e.decode())
msg_content = '\r\n'.join(lists)
msg = Parser().parsestr(msg_content)
print_info(msg)
#server.dele(index)
#提交操作信息并退出
server.quit()