listfix/email.py (view raw)
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import re
import os
re_header_cont = re.compile("^\s+\S+")
re_header_end = re.compile("^\s*$")
re_email_parts = re.compile("(\S+)@(\S+\.\S+)")
re_sender_info = re.compile("^From:\s+\"?([^<>\"]*?)\"?\s*<?(([^<>\"\s]+)@\S+\.[^<>\"\s]+)>?$")
re_auto_reply = re.compile("^Auto-Submitted: (auto-generated|auto-replied)", re.IGNORECASE)
class Email:
def __init__(self, content):
if (type(content) is not list):
raise TypeError("Email content should be of list type.")
if (len(content) == 0):
raise IndexError("Email content cannot be empty list.")
self.content = content[:]
def get_content(self):
return self.content[:]
def get_headers(self):
headers = []
for line in self.content:
if (re_header_end.match(line)):
break
headers.append(line)
return headers
def get_header(self, prefix):
header = None
prefix = prefix.lstrip().rstrip()
if (prefix[-1] == ":"):
prefix = prefix[0:-1]
re_header = re.compile("^" + prefix + ": ", re.IGNORECASE)
headers = self.get_headers();
for i, line in enumerate(headers):
if (re_header.match(line)):
header = line.rstrip()
i += 1
while (i < len(headers) and re_header_cont.match(headers[i])):
header = header + "\n" + headers[i].rstrip()
i += 1
break
if (not header):
raise ValueError(f"Could not find header for '{prefix}'")
return header
def get_sender_email(self):
from_line = self.get_header("From")
if (not re_sender_info.match(from_line)):
raise ValueError(f"Could not extract sender email for header '{header}'")
results = re_sender_info.search(from_line)
sender_email = results.group(2)
return sender_email
def get_sender_name(self):
from_line = self.get_header("From")
if (not re_sender_info.match(from_line)):
raise ValueError(f"Could not extract sender name for header '{header}'")
results = re_sender_info.search(from_line)
sender_name = results.group(1) if results.group(1) else results.group(3)
return sender_name
def check_auto_reply(self):
auto_sub_line = None
try:
auto_sub_line = self.get_header("Auto-Submitted")
except ValueError:
return False
if (auto_sub_line and re_auto_reply.match(auto_sub_line)):
return True
def strip_headers(self, exclude):
ex_string = "|".join(exclude)
re_exclude = re.compile("^(" + ex_string + "): ", re.IGNORECASE)
j = 0
header_cont = False
for i, header in enumerate(self.get_headers()):
if (re_exclude.match(header)):
header_cont = True
continue
elif (header_cont == True and re_header_cont.match(header)):
continue
else:
del self.content[i-j]
header_cont = False
j += 1
def add_header(self, header):
header = header.rstrip() + "\n"
self.content.append(header)
def add_header_prepend(self, header):
header = header.rstrip() + "\n"
self.content.insert(0, header)
def send(self, recipient):
p = os.popen(f"/usr/sbin/sendmail -G -i {recipient}", "w")
for line in self.content:
p.write(line)
p.close()
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