python发送邮件附件中文名乱码_处理 python3 邮件附件中文名乱码的问题

最近接手了一个 py 机器人的开发，发现不论传入的附件路径是变量、字符串、先编码后解码的字符串都解决不了名称乱码。

打开源码一看，是这个逻辑：

def send_smtp_mail(server=None,port=25,psw=None,sender=None,receivers=None,cc=None,bcc=None,subject=None,body=None,attachments=None,ssl='no'):

'''

SMTP发送邮件

server:smtp服务器 port:端口号 psw:登陆密码 sender:发送方 receivers:接收者

cc:抄送 bcc:密抄 subject:标题 body:邮件正文 attachments:附件路径

'''

__logger.debug('smtp Send mail:[' + str(server) + '][' + str(port) + ']')

re = []

try:

msgRoot = MIMEMultipart()

#msgRoot['Subject'] = subject 构造标题

msgRoot['Subject'] = Header(subject, 'utf-8').encode()

msgRoot['Cc'] = "".join(str(cc))

msgRoot['Bcc'] = "".join(str(bcc))

msgRoot['From'] = formataddr(["", sender])

msgRoot['To'] = formataddr(["", receivers])

msgRoot.attach(MIMEText(body, 'plain', 'utf-8'))

if attachments != None:

for attachment in attachments.split(','):

rst= os.path.exists(attachment)

if rst :

excelFile = open(attachment, 'rb').read()

fileName = os.path.basename(os.path.realpath(attachment))

att = MIMEApplication(excelFile)

att.add_header('Content-Disposition', 'attachment', fileName=('gbk', '', fileName))

msgRoot.attach(att)

else:

__logger.debug(u'Attachment path does not exist')

if receivers != None and receivers != '':

re = receivers.split(',')

if cc != None and cc != '':

re = re + str(cc).split(',')

if bcc !=None and bcc != '':

re = re + str(bcc).split(',')

smtp = smtplib.SMTP()

if ssl=='yes':

smtp = smtplib.SMTP_SSL()

smtp.connect(server,port)

psw = encrypt.decrypt(psw)

smtp.login(sender, psw)

smtp.sendmail(sender,re, msgRoot.as_string())

smtp.quit()

except Exception as e:

raise e

finally:

__logger.echo_msg(u"end execute[sendMail]")

发现这里对附件的处理只是获取真正的附件名，并传入 Content-Disposition 中。在 segmentfault 查到，要给 fileName 进行两次 utf-8 编码、然后用 email.header 库的 make_header() 函数处理一次附件名、才传给 Content-Disposition 中。 修改之后的源码可以正常识别中文名字的附件了，贴一下修改后的源代码：

def send_smtp_mail1(server=None,port=25,psw=None,sender=None,receivers=None,cc=None,bcc=None,subject=None,body=None,attachments=None,ssl='no'):

'''

SMTP发送邮件

server:smtp服务器 port:端口号 psw:登陆密码 sender:发送方 receivers:接收者

cc:抄送 bcc:密抄 subject:标题 body:邮件正文 attachments:附件路径

'''

__logger.debug('smtp Send mail:[' + str(server) + '][' + str(port) + ']')

re = []

try:

msgRoot = MIMEMultipart()

#msgRoot['Subject'] = subject 构造标题

msgRoot['Subject'] = Header(subject, 'utf-8').encode()

msgRoot['Cc'] = "".join(str(cc))

msgRoot['Bcc'] = "".join(str(bcc))

msgRoot['From'] = formataddr(["", sender])

msgRoot['To'] = formataddr(["", receivers])

msgRoot.attach(MIMEText(body, 'plain', 'utf-8'))

if attachments != None:

for attachment in attachments.split(','):

rst= os.path.exists(attachment)

if rst :

excelFile = open(attachment, 'rb').read()

fileName = os.path.basename(os.path.realpath(attachment))

att = MIMEApplication(excelFile)

att.add_header('Content-Disposition', 'attachment', fileName = "%s" % make_header([(fileName, 'UTF-8')]).encode('UTF-8') )

msgRoot.attach(att)

else:

__logger.debug(u'Attachment path does not exist')

if receivers != None and receivers != '':

re = receivers.split(',')

if cc != None and cc != '':

re = re + str(cc).split(',')

if bcc !=None and bcc != '':

re = re + str(bcc).split(',')

smtp = smtplib.SMTP()

if ssl=='yes':

smtp = smtplib.SMTP_SSL()

smtp.connect(server,port)

psw = encrypt.decrypt(psw)

smtp.login(sender, psw)

smtp.sendmail(sender,re, msgRoot.as_string())

smtp.quit()

except Exception as e:

raise e

finally:

__logger.echo_msg(u"end execute[sendMail]")

所以不要迷信什么产品的内置函数，，业务开发真的有很多细节要考虑周全啊。原始答案在： https://segmentfault.com/q/1010000016296204/