IMAPLIB“命令在状态nonauth中选择非法” 我试图创建一个应用程序来检索和分析通过Gmail发送的电子邮件。我正在使用此处的教程进行更改； http://www.voidynullness.net/blog/2013/07/25/gmail-gmail-email-

Question

readmail.py

EMAIL_ACCOUNT = "*****"
PASSWD = "*****"
def process_mailbox(M):
    rv, data = M.search(None, "ALL")
    resp, items = M.search(None, "ALL")
    if rv != 'OK':
        print("No messages found!")
        return

    for num in data[0].split():
        rv, data, = M.fetch(num, '(RFC822)')
        if rv != 'OK':
            print("ERROR getting message", num)
            return

        msg = email.message_from_bytes(data[0][1])
        hdr = email.header.make_header(email.header.decode_header(msg['Subject']))
        if msg.is_multipart():
            for part in msg.get_payload():
                body = part.get_payload()
        subject = str(hdr)
        print('Message %s: %s' % (num, subject))
        print('Body:', body)

M = imaplib.IMAP4_SSL('imap.gmail.com',993)


try:
    rv, data = M.login(EMAIL_ACCOUNT, PASSWD)
except imaplib.IMAP4.error:
    print ("LOGIN FAILED!!! ")
    sys.exit(1)

print(rv, data)

rv, data = M.select("INBOX")
if rv == 'OK':
    print("Processing mailbox...\n")
    process_mailbox(M)
    M.close()
else:
    print("ERROR: Unable to open mailbox ", rv)

M.logout()

当我通过命令行运行此代码时，输出是预期的，但是当通过基本烧瓶中导入整个东西时，整个东西都会崩溃。

app.py

from flask import Flask, render_template, jsonify, request
from readmail import process_mailbox
import json
import imaplib
app = Flask(__name__)

@app.route('/')
def homepage():
    return render_template('index.html')

@app.route('/test')
def test():
    return json.dumps({'name': process_mailbox(imaplib.IMAP4_SSL('imap.gmail.com',993)).subject})

if __name__ == '__main__':
    app.run(use_reloader=True, debug=True)

我收到的错误是;

Traceback (most recent call last):
  File "C:\Python34\lib\site-packages\flask\app.py", line 1997, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Python34\lib\site-packages\flask\app.py", line 1985, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Python34\lib\site-packages\flask\app.py", line 1540, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Python34\lib\site-packages\flask\_compat.py", line 33, in reraise
    raise value
  File "C:\Python34\lib\site-packages\flask\app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Python34\lib\site-packages\flask\app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Python34\lib\site-packages\flask\app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Python34\lib\site-packages\flask\_compat.py", line 33, in reraise
    raise value
  File "C:\Python34\lib\site-packages\flask\app.py", line 1612, in 
full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Python34\lib\site-packages\flask\app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Users\user\project\flask\venv\Project\app.py", line 13, in test
    return json.dumps({'name': 
process_mailbox(imaplib.IMAP4_SSL('imap.gmail.com',993)).subject})
  File "C:\Users\user\project\flask\venv\Project\readmail.py", line 14, in process_mailbox
    M.select('"[Gmail]/All Mail"')
  File "C:\Python34\lib\imaplib.py", line 683, in select
    typ, dat = self._simple_command(name, mailbox)
  File "C:\Python34\lib\imaplib.py", line 1134, in _simple_command
    return self._command_complete(name, self._command(name, *args))
  File "C:\Python34\lib\imaplib.py", line 882, in _command
    ', '.join(Commands[name])))imaplib.error: command SELECT illegal in state NONAUTH, only allowed in 
states AUTH, SELECTED

上周我进行了几次尝试，以找出解决此错误的方法，因此将不胜感激。
    

首先，查看跟踪的结尾，您有

imaplib.error: command SELECT illegal in state NONAUTH, only allowed in states AUTH, SELECTED

-然后回到代码的追溯中的两行：

app.py, test ... return json.dumps({'name': process_mailbox(imaplib.IMAP4_SSL('imap.gmail.com',993)).subject})
readmail.py process_mailbox ... M.select('"[Gmail]/All Mail"')

Answer 1

我在这里修剪了一些多余的东西，但是在测试中，您仅连接到Gmail IMAP服务器，但不登录。以下代码是您的ffirst文件所做的：

M = imaplib.IMAP4_SSL('imap.gmail.com',993)

try:
    rv, data = M.login(EMAIL_ACCOUNT, PASSWD)
except imaplib.IMAP4.error:
    print ("LOGIN FAILED!!! ")
    sys.exit(1)

，也只会返回null，它会直接更改您直接传递的对象。

在我的情况下，错误是我没有正确登录。 因此，您必须确保您这样做

process_mailbox

我希望这能起作用。