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#!/usr/bin/env python3
# vim: set fileencoding=utf8 :
import http.client, sys, os, mailbox, time, json, re, html.entities, email, email.policy
from base64 import b64decode
from pprint import pprint
class YahooException (Exception):
pass
class Fetch (object):
"""
throttled url fetcher
"""
# limits per hour
# 0.6, 0.7, 0.8, 0.9 seem to be fine
# 0.5 is too much
WAIT = 0.6
TEMP_ERROR_CODE = [1001, 1007]
def __init__ (self, host):
self.conn = http.client.HTTPSConnection (host)
self.lastfetch = 0
def fetch (self, path):
tries = 0
wait = self.WAIT
while tries < 3:
while True:
now = time.time ()
if self.lastfetch < now-wait:
break
time.sleep (wait)
self.lastfetch = now
print ('fetching {}'.format (path))
self.conn.request ('GET', path)
resp = self.conn.getresponse ()
try:
o = json.loads (resp.read ().decode ('utf-8'))
except ValueError:
if resp.find ('error 999') != -1:
print ('we got banned')
else:
# retry
continue
if 'ygError' in o:
err = o['ygError']
pprint (o)
if err['errorCode'] in self.TEMP_ERROR_CODE:
tries += 1
wait *= 2
continue
raise YahooException (o['ygError']['errorCode'])
return o['ygData']
raise YahooException ('cannot fetch shit')
def _entitysub (match):
if match.group (1) == '#':
return chr (int (match.group (2)))
elif match.group (1).lower () == '#x':
return chr (int (match.group (2), 16))
else:
return chr (html.entities.name2codepoint.get (match.group(2), 0xfffd))
def storemessage (mb, data):
entityre = re.compile (r'&(#|#x|)([a-z0-9]+);', re.I)
fixfromre = re.compile ('.*? <.*?@\.\.\.$', re.I)
# actually the email is not raw, but html quoted
rawemail = entityre.sub (_entitysub, data['rawEmail'])
# XXX: encoding will probably destroy any non-ascii chars
m = email.message_from_bytes (rawemail.encode ('utf-8'))
# there’s uncensored headers here, base64-encoded
headerMap = {
'messageIdInHeader': 'Message-Id',
'inReplyToHeader': 'In-Reply-To',
'referencesHeader': 'References',
}
for k, v in data['headers'].items ():
if k in headerMap:
if headerMap[k] not in m:
m.add_header (headerMap[k], b64decode (v).decode ('utf8'))
else:
m.replace_header (headerMap[k], b64decode (v).decode ('utf8'))
else:
print ('no header name known for {}'.format (k))
# add interesting headers
m['X-YahooArchiver-MsgId'] = '{}'.format (data['msgId'])
# Mark message as read
m['Status'] = 'R'
# fix from email address, someone made a mistake and replaced
# everything after the @ with just three dots, breaking ("john doe" <foo@)
if 'From' in m:
if fixfromre.match (m['From']):
m.replace_header ('From', m['From'] + '>')
elif m['From'][-1] == ')':
m.replace_header ('From', m['From'][:-1])
mb.add (m)
if __name__ == '__main__':
listname = sys.argv[1]
mboxpath = sys.argv[2]
# delete if it exists, we’re gonna append _all_ messages anyway
if os.path.isfile (mboxpath):
os.remove (mboxpath)
mb = mailbox.mbox (mboxpath)
f = Fetch ('groups.yahoo.com')
start = 0
while True:
path = '/api/v1/groups/{}/messages?count=100&start={}&sortOrder=asc&direction=1'.format (listname, start)
try:
data = f.fetch (path)
except YahooException:
break
added = 0
maxid = start
for m in data['messages']:
msgid = int (m['messageId'])
if msgid < start:
# have that one already
continue
maxid = max (maxid, msgid)
added += 1
# fetch raw message
try:
path = '/api/v1/groups/{}/messages/{}/raw'.format (listname, msgid)
rawmsg = f.fetch (path)
assert rawmsg['msgId'] == msgid
storemessage (mb, rawmsg)
except YahooException:
print ('cannot fetch raw message body')
start = maxid+1
if added == 0:
break
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