python有很多强大的module，邮箱相关的就有smtplib，sendmail等，但是今天ichram想使用socket来实现发送邮件的功能，也是为了学习python，练手为主。
SMTP
smtp是simple mail tranfer protocal的简写，是定义在应用层上的协议，通信的过程双方使用SMTP命令码交换信息，详细资料可以参考 http://www.cnpaf.net/rfc/rfc821.txt 。
源码
下面代码托管于github： https://github.com/icharm/pyTools/blob/master/sendmail.py
#this is a simple demo to send mail by socket module
import socket
import time
import base64
import md5
import random
PATH = "log/sendmail.log"
#getTime according special format
def getTime(format):
#return the time format like 2017-07-17 15:34:23
if(format == 1):
ISOTIMEFORMAT = '%Y-%m-%d %X'
return time.strftime(ISOTIMEFORMAT, time.localtime());
#return the time format like Sun Jun 15:34:23 2017
elif(format == 2):
return time.asctime( time.localtime(time.time()) )
def printErr(msg):
print "[-]Error "+ getTime(1) + ' ' + msg +'\n'
def saveLog(msg, flag):
if flag == 1:
log = '[-]Error '+ getTime(1) + ' ' + msg +'\n'
elif flag == 2:
log = '[-]Warning '+ getTime(1) + ' ' + msg + '\n'
elif flag == 3:
log = '[*]Debug '+ getTime(1) + ' '+ msg + '\n'
else:
log = '[+]Normal '+ getTime(1) + ' '+ msg + '\n'
try:
f = open(PATH, 'a')
f.write(log)
f.close()
except Exception, e:
printErr(str(e))
#使用smtp命令码与服务器通信
#fr: mail form
#to: mail to
#data: mail content
def sendMailCore(fr, to, data):
s = socket.socket()
#make sure to connect server
try:
while True:
s.connect(("10.204.148.47", 25))
banner = s.recv(1024)
if banner[:3] == '220':
break
else:
saveLog("Connect return: "+ banner, 3)
while True:
s.send("EHLO kali.mei.com\r\n")
ret = s.recv(1024)
if ret[:3] == '250':
break
else:
saveLog("EHLO return: "+ banner, 3 )
while True:
s.send("MAIL FROM:<"+ fr +">\r\n")
ret = s.recv(1024)
if ret[:3] == '250':
break
else:
saveLog("FROM return: "+ banner, 3)
while True:
s.send("RCPT TO:<"+ to +">\r\n")
ret = s.recv(1024)
if ret[:3] == '250':
break
else:
saveLog("RCPT return: "+ banner, 3)
while True:
s.send("DATA\r\n")
ret = s.recv(1024)
if ret[:3] == '354':
break
else:
saveLog("DATA return:"+ banner, 3)
while True:
s.send(data.encode('utf-8'))
s.send("\r\n.\r\n")
ret = s.recv(1024)
if ret[:3] == '250':
break
else:
saveLog("DATA OVER return: "+ banner, 3)
while True:
s.send("QUIT\r\n")
ret = s.recv(1024)
if ret[:3] == '221':
break
else:
saveLog("Line 79 Error", 3)
s.close()
return True
except Exception, e:
saveLog(str(e), 1)
return False
def makeContent(fr, to, subject, data, isHtml=False, Path=None):
#构造邮件头 和 MIMEtext 分段
#需要注意的就是boundary="-----=_Part_{random}_=-----" 这行定义了一个邮件的分段标志，这里假设分段标志为A，即boundary="A"。则每一个内容分段开头一行必须是--A，而邮件的结尾必须有A--
mail_template = '''Date: {date}\r\nFrom: <{from}>\r\nTo: <{to}>\r\nSubject: {subject}\r\nX-priority: {priority}\r\nX-Mailer: Charmail 1.0.0[cn]\r\nMIME-Version: 1.0\r\nContent-Type: multipart/alternative;\r\n\tboundary="-----=_Part_{random}_=-----"\r\n{content}\r\n-------=_Part_{random}_=-------'''
#构造邮件的一个内容分段（该分段的内容类型为text/plain）
#需要注意的是内容的分段必须以上面定义的分段标志开始，且在分段标志的最前面加上两个短横杠--
text_content_template = '''-------=_Part_{random}_=-----\r\nContent-Type: text/plain;\n\tcharset="UTF-8"\r\nContent-Transfer-Encoding: base64\r\n\r\n{content}\r\n'''
#构造邮件的一个内容分段（该分段的内容类型为text/html）
html_content_template = '''-------=_Part_{random}_=-----\r\nContent-Type: text/html;\r\n\tcharset=UTF-8\r\nContent-Transfer-Encoding: quoted-printable\r\n{content}\r\n'''
#构造邮件的一个内容分段（该分段的内容类型为zip附件）
attachment_content_template='''-------=_Part_{random}_=-----\r\nContent-Type: {type};\r\n\tname={name}\r\nContent-Transfer-Encoding: base6\r\nContent-Disposition: attachment;\r\n\tfilename={name}\r\n{content}\r\n'''
#MIME 支持的文件类型有很多，详细的可以参考http://www.w3school.com.cn/media/media_mimeref.asp
attachment_type = ['text/plain', 'application/zip', 'image/jpeg']
#生成一个随机码来表示邮件分段
#这里icharm是使用随机的截取forn，to，data中的任意长度的字符重新结合并进行md5加密，得到的随机码，理论上重复的可能性很小，但是写的有点麻烦，不推荐
fr_len = len(fr)
fr_len_2 = int(fr_len/2)
to_len = len(to)
to_len_2 = int(to_len/2)
sub_len = len(subject)
sub_len_2 = int(sub_len/2)
rand = fr[random.randint(0,fr_len_2) : random.randint(fr_len_2,fr_len)] + to[ random.randint(0,to_len_2) : random.randint(to_len_2, to_len)] + subject[ random.randint(0,sub_len_2) : random.randint(sub_len_2, sub_len)]
md = md5.new()
md.update(rand)
rand = md.hexdigest()
if isHtml == True:
content = html_content_template
content = content.replace('{content}', data)
content = content.replace('{random}', rand)
else:
content = text_content_template
content = content.replace('{content}', base64.b64encode(data))
content = content.replace('{random}', rand)
#make attachment content later
#make the total mail content
mail_template = mail_template.replace('{date}', getTime(2))
mail_template = mail_template.replace('{from}', fr)
mail_template = mail_template.replace('{to}', to)
mail_template = mail_template.replace('{subject}', subject)
mail_template = mail_template.replace('{priority}', '3')
mail_template = mail_template.replace('{random}', rand, 5)
mail_template = mail_template.replace('{content}', content)
return mail_template
def sendMail(fr, to, subject, data, isHtml=False, Path=None ):
return sendMailCore(fr, to, makeContent(fr, to, subject, data, isHtml, Path) )
def main():
result = sendMail('a@icharm.me', 'b@icharm.me', 'Charmail test' ,'''
Mail come form Charmail By icharm.me
''')
if result == True:
print "Successed"
saveLog("Mail Send Success", 5)
else:
print "Failed"
saveLog("Send Mail Failed", 3)
if __name__ == '__main__':
main()参考
http://www.cnpaf.net/rfc/rfc821.txt
http://www.w3school.com.cn/media/media_mimeref.asp
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