add pop3 sample

samples/mail/fetch_mail.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from email.parser import Parser
+from email.header import decode_header
+from email.utils import parseaddr
+
+import poplib
+
+# 输入邮件地址, 口令和POP3服务器地址:
+email = input('Email: ')
+password = input('Password: ')
+pop3_server = input('POP3 server: ')
+
+def guess_charset(msg):
+    charset = msg.get_charset()
+    if charset is None:
+        content_type = msg.get('Content-Type', '').lower()
+        pos = content_type.find('charset=')
+        if pos >= 0:
+            charset = content_type[pos + 8:].strip()
+    return charset
+
+def decode_str(s):
+    value, charset = decode_header(s)[0]
+    if charset:
+        value = value.decode(charset)
+    return value
+
+def print_info(msg, indent=0):
+    if indent == 0:
+        for header in ['From', 'To', 'Subject']:
+            value = msg.get(header, '')
+            if value:
+                if header=='Subject':
+                    value = decode_str(value)
+                else:
+                    hdr, addr = parseaddr(value)
+                    name = decode_str(hdr)
+                    value = u'%s <%s>' % (name, addr)
+            print('%s%s: %s' % ('  ' * indent, header, value))
+    if (msg.is_multipart()):
+        parts = msg.get_payload()
+        for n, part in enumerate(parts):
+            print('%spart %s' % ('  ' * indent, n))
+            print('%s--------------------' % ('  ' * indent))
+            print_info(part, indent + 1)
+    else:
+        content_type = msg.get_content_type()
+        if content_type=='text/plain' or content_type=='text/html':
+            content = msg.get_payload(decode=True)
+            charset = guess_charset(msg)
+            if charset:
+                content = content.decode(charset)
+            print('%sText: %s' % ('  ' * indent, content + '...'))
+        else:
+            print('%sAttachment: %s' % ('  ' * indent, content_type))
+
+# 连接到POP3服务器:
+server = poplib.POP3(pop3_server)
+# 可以打开或关闭调试信息:
+server.set_debuglevel(1)
+# 可选:打印POP3服务器的欢迎文字:
+print(server.getwelcome().decode('utf-8'))
+# 身份认证:
+server.user(email)
+server.pass_(password)
+# stat()返回邮件数量和占用空间:
+print('Messages: %s. Size: %s' % server.stat())
+# list()返回所有邮件的编号:
+resp, mails, octets = server.list()
+# 可以查看返回的列表类似[b'1 82923', b'2 2184', ...]
+print(mails)
+# 获取最新一封邮件, 注意索引号从1开始:
+index = len(mails)
+resp, lines, octets = server.retr(index)
+# lines存储了邮件的原始文本的每一行,
+# 可以获得整个邮件的原始文本:
+msg_content = b'\r\n'.join(lines).decode('utf-8')
+# 稍后解析出邮件:
+msg = Parser().parsestr(msg_content)
+print_info(msg)
+# 可以根据邮件索引号直接从服务器删除邮件:
+# server.dele(index)
+# 关闭连接:
+server.quit()