邮箱大挪移
文章目录
在GOOGLE被“驱逐”中国后，我越来越担心Gmail的命运了。这几天貌似google.com.hk都间歇性的刷不出来了。就怕哪天完全被屏蔽了，这下啥都完了。目前我的邮箱已经是Google的域名邮箱，里面存有几千个邮件，包括163和以前Gmail的几个邮箱的。但挪移邮箱并不是那么简单的事情，用POP3和SMTP没法完成这个任务。还好IMAP提供了邮件下载和上传的功能，圆满解决我的需求。完整的IMAP协议见：http://www.faqs.org/rfcs/rfc3501.html
在所有的库中，支持IMAP最好的是Python。Python的imaplib提供了IMAP的很好的支持，而且应用简单(http://docs.python.org/library/imaplib.html)。在IMAP下载中，这个python脚本提供了一个很好的例子：http://the.taoofmac.com/media/Projects/imapbackup/imapbackup.py.txt
我的需求比较简单，将几个邮箱的数据全部转移到QQ邮箱即可，并且要区分收件箱和发件箱。
实现起来，首先将所有的邮箱转发到需要转移到的邮箱(避免下载的时候多出几个新邮件来)，然后通过IMAP将所有邮箱的数据下载下来(注意有可能有以前通过POP3下载的重复的数据)，最后再上传到QQ邮箱。
具体实现中，将IMAP的数据下载后，对BODY部分的MD5编码作为文件名，然后放置到一个文件夹中，命名为receive。对于制定的发件箱，需要存到sent文件夹中。这样receive中就有所有的邮件，并且不重复。
然后上传到QQ邮箱，上传成功就删除一个本地文件，避免重复上传。
我参考imapbackup.py写了一个IMAPServer类，用于下载和上传
import os, imaplib, re, hashlib, shutil, getopt
class IMAPServer:
def __init__(self, server, port, ssl, usr, psd):
if ssl:
self.__server=imaplib.IMAP4_SSL(server, port)
else:
self.__server=imaplib.IMAP4(server, port)
self.__server.debug=4
self.__server.login(usr, psd)
print usr , " loged in"
def __parse_paren_list(self, row):
"""Parses the nested list of attributes at the start of a LIST response"""
# eat starting paren
assert(row[0] == '(' )
row = row[1:]
result = []
# NOTE: RFC3501 doesn't fully define the format of name attributes
name_attrib_re = re.compile("^s*(\\[a-zA-Z0-9_]+)s*")
# eat name attributes until ending paren
while row[0] != ')':
# recurse
if row[0] == '(':
paren_list, row = parse_paren_list(row)
result.append(paren_list)
# consume name attribute
else:
match = name_attrib_re.search(row)
assert(match != None)
name_attrib = row[match.start():match.end()]
row = row[match.end():]
#print "MATCHED '%s' '%s'" % (name_attrib, row)
name_attrib = name_attrib.strip()
result.append(name_attrib)
# eat ending paren
assert(')' == row[0])
row = row[1:]
# done!
return result, row
def __parse_string_list(self, row):
"""Parses the quoted and unquoted strings at the end of a LIST response"""
slist = re.compile('s*(?:"([^"]+)")s*|s*(S+)s*').split(row)
return [s for s in slist if s]
def __parse_list(self, row):
"""Prases response of LIST command into a list"""
row = row.strip()
paren_list, row = self.__parse_paren_list(row)
string_list = self.__parse_string_list(row)
assert(len(string_list) == 2)
return [paren_list] + string_list
def __get_hierarchy_delimiter(self):
"""Queries the imapd for the hierarchy delimiter, eg. '.' in INBOX.Sent"""
# see RFC 3501 page 39 paragraph 4
typ, data = self.__server.list('', '')
assert(typ == 'OK')
assert(len(data) == 1)
lst = self.__parse_list(data[0]) # [attribs, hierarchy delimiter, root name]
hierarchy_delim = lst[1]
# NIL if there is no hierarchy
if 'NIL' == hierarchy_delim:
hierarchy_delim = '.'
return hierarchy_delim
def __convert_utf7(self, str):
p=str.split("&")
rst=p[0]+("+"+p[1]).decode("utf-7")
return rst
def get_mailbox_names(self):
delim = self.__get_hierarchy_delimiter()
# Get LIST of all folders
typ, data = self.__server.list()
assert(typ == 'OK')
names=[]
# parse each LIST, find folder name
for row in data:
lst = self.__parse_list(row)
foldername = lst[2]
unicodename=foldername
if foldername.find('&')>=0:
unicodename=self.__convert_utf7(foldername)
names.append((foldername,unicodename))
return names
def get_mail(self, mailbox, dir, fromid=1):
type, num= self.__server.select(mailbox)
#type, data =self.__server.search(None,"ALL")
for mail_id in range(fromid,int(num[0])+1):
type=None
try:
type, msg_data=self.__server.fetch(mail_id, "(RFC822 BODY[TEXT])")
except:
print "Get ", mail_id, " failed"
if type!="OK":
continue
content=msg_data[0][1]
bodyMD5=msg_data[1][1].strip()
print "Saving ",mail_id, " total ", num[0]
filename=hashlib.md5(bodyMD5).hexdigest()
file=open(os.path.join(dir,filename), "wb")
file.write(content)
file.flush()
file.close()
def upload_mail(self, mailbox, content):
print self.__server.append(mailbox,0,0,content)
先是下载邮件：
def getAllMails(receive_folder,sent_folder):
src_svr=IMAPServer("imap.gmail.com",993, True, "gmail@gmail.com", "gmail")
for mailbox, unicode in src_svr.get_mailbox_names():
print mailbox, "t" , unicode
src_svr.get_mail('INBOX', receive_folder)
src_svr.get_mail('[Gmail]/&XfJT0ZCuTvY-', sent_folder)
src_svr=IMAPServer("imap.163.com",993, True, "163", "163")
for mailbox, unicode in src_svr.get_mailbox_names():
print mailbox, "t" , unicode
src_svr.get_mail('INBOX', receive_folder)
src_svr.get_mail('Sent Items', sent_folder)
print "Done"
待所有的邮件下载完成以后，再上传：
def copyto(receive_folder, sent_folder):
to_receive_folder="D:\mail\to_receive"
to_sent_folder="D:\mail\to_sent"
to_svr=IMAPServer("imap.qq.com", 993, True, "QQ号码", '密码')
print "Upload"
finished=0
total=len(os.listdir(receive_folder))
for received in os.listdir(receive_folder):
finished+=1
print finished, "t", total
path=os.path.join(receive_folder, received)
file=open(path, "r")
content=file.read()
file.close()
to_svr.upload_mail('INBOX',content)
os.remove(path)
finished=0
total=len(os.listdir(sent_folder))
for sent in os.listdir(sent_folder):
finished+=1
print finished, "t", total
path=os.path.join(sent_folder, sent)
file=open(path, "r")
content=file.read()
file.close()
to_svr.upload_mail('&XfJT0ZABkK5O9g-',content)
os.remove(path)
主程序如下：
def main():
"""Main entry point"""
receive_folder="D:\mail\received\"
sent_folder="D:\mail\sent"
getAllMails(receive_folder,sent_folder) #先把所有的邮件下载完成后，再用copyto函数
#copyto(receive_folder,sent_folder)
if __name__ == '__main__':
main()
这样就可以挪移咯。经过实验，将我的所有的2300多个邮件全部转移到QQ邮箱，并且发送和接受都分开存储。 当然这个脚本还有很多不足，比如MD5的方式比较内容还是有点问题。例如你把GMAIL的邮件下载下来放到QQ上去再下载下来，你就会发现BODY最后的部分多了几个空格，MD5的方式就不能检测出这种相同的邮件。 控制台的方式显然比较麻烦，最好的办法还是做一个GUI来进行同步处理。只是我没有那么多时间来整这个了，有兴趣的朋友可以发挥你们的才能。
文章作者 贺思聪
上次更新 2010-03-30
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