我正在try 使用一个python文件连接到PythonAnywhere上的MySQL8数据库.我已经把所有东西都设置好了，就像their help page号上面所列的那样.我有一个允许外部连接的高级帐户.
我使用相同的凭据将MySQL工作台连接到数据库，一切都正常工作. 然而，使用我的脚本中相同的凭据，使用日志(log)记录，只会挂在一行上.如果我将用户名、密码、端口号等更改为不正确，则它会意识到并引发异常.
完整的代码是:
import mysql.connector
import sshtunnel
import logging
import sys
log_format = "%(levelname)s %(asctime)s - %(message)s"
logging.basicConfig(
stream=sys.stdout, filemode="w", format=log_format, level=logging.DEBUG
)
logger = logging.getLogger()
logger.propagate = True
sshtunnel.SSH_TIMEOUT = 5.0
sshtunnel.TUNNEL_TIMEOUT = 5.0
# SSH tunnel configuration
ssh_host = "ssh.pythonanywhere.com"
ssh_username = "my_pythonanywhere_username"
ssh_password = "my_pythonanywhere_password"
# Database configuration
db_host = "my_pythonanywhere_username.mysql.pythonanywhere-services.com"
db_port = 3306
db_username = "my_pythonanywhere_username"
db_password = "my_password"
logger.info("Hello before tunnel")
# Establish SSH tunnel
try:
with sshtunnel.SSHTunnelForwarder(
(ssh_host), # , ssh_port),
ssh_username=ssh_username,
ssh_password=ssh_password,
remote_bind_address=(db_host, db_port),
) as tunnel:
logger.info("Hello mid tunnel")
db_config = {
"user": db_username,
"password": db_password,
"host": "127.0.0.1",
"port": tunnel.local_bind_port,
}
logger.info(tunnel.local_bind_port)
db = mysql.connector.connect(**db_config)
logger.info("Hello after tunnel")
# Execute SQL command
query = "SHOW DATABASES;"
cursor = db.cursor()
cursor.execute(query)
# Fetch and print the result
databases = cursor.fetchall()
for database in databases:
print(database[0])
# Close cursor and connection
except Exception as e:
logger.error("An error occurred: %s", str(e))
finally:
if "cursor" in locals() and cursor:
cursor.close()
if "db" in locals() and db:
db.close()
if "tunnel" in locals() and tunnel:
tunnel.close()
logger.info("Hello end of file")
当我运行这个程序时，我看到"Hello Beer Tunes"和"Hello Mid Tunes"，但没有进一步的内容.凭据和try/Except块中的任何错误都会捕获它，并打印"Hello end of file"行.
挂起时打印的包含日志(log)语句的完整列表如下:
INFO 2023-08-23 19:58:31,099 - Hello before tunnel
DEBUG 2023-08-23 19:58:31,272 - starting thread (client mode): 0x9d33a440
DEBUG 2023-08-23 19:58:31,273 - Local version/idstring: SSH-2.0-paramiko_3.3.1
DEBUG 2023-08-23 19:58:31,376 - Remote version/idstring: SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.5
INFO 2023-08-23 19:58:31,376 - Connected (version 2.0, client OpenSSH_8.2p1)
DEBUG 2023-08-23 19:58:31,474 - === Key exchange possibilities ===
DEBUG 2023-08-23 19:58:31,474 - kex algos: curve25519-sha256, curve25519-sha256@libssh.org, ecdh-sha2-nistp256, ecdh-sha2-nistp384, ecdh-sha2-nistp521, diffie-hellman-group-exchange-sha256, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group14-sha256
DEBUG 2023-08-23 19:58:31,474 - server key: rsa-sha2-512, rsa-sha2-256, ssh-rsa
DEBUG 2023-08-23 19:58:31,474 - client encrypt: chacha20-poly1305@openssh.com, aes128-ctr, aes192-ctr, aes256-ctr, aes128-gcm@openssh.com, aes256-gcm@openssh.com
DEBUG 2023-08-23 19:58:31,474 - server encrypt: chacha20-poly1305@openssh.com, aes128-ctr, aes192-ctr, aes256-ctr, aes128-gcm@openssh.com, aes256-gcm@openssh.com
DEBUG 2023-08-23 19:58:31,481 - client mac: umac-64-etm@openssh.com, umac-128-etm@openssh.com, hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, hmac-sha1-etm@openssh.com, umac-64@openssh.com, umac-128@openssh.com, hmac-sha2-256, hmac-sha2-512, hmac-sha1
DEBUG 2023-08-23 19:58:31,481 - server mac: umac-64-etm@openssh.com, umac-128-etm@openssh.com, hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, hmac-sha1-etm@openssh.com, umac-64@openssh.com, umac-128@openssh.com, hmac-sha2-256, hmac-sha2-512, hmac-sha1
DEBUG 2023-08-23 19:58:31,483 - client compress: none, zlib@openssh.com
DEBUG 2023-08-23 19:58:31,484 - server compress: none, zlib@openssh.com
DEBUG 2023-08-23 19:58:31,485 - client lang: <none>
DEBUG 2023-08-23 19:58:31,485 - server lang: <none>
DEBUG 2023-08-23 19:58:31,486 - kex follows: False
DEBUG 2023-08-23 19:58:31,487 - === Key exchange agreements ===
DEBUG 2023-08-23 19:58:31,488 - Kex: curve25519-sha256@libssh.org
DEBUG 2023-08-23 19:58:31,489 - HostKey: rsa-sha2-512
DEBUG 2023-08-23 19:58:31,489 - Cipher: aes128-ctr
DEBUG 2023-08-23 19:58:31,490 - MAC: hmac-sha2-256
DEBUG 2023-08-23 19:58:31,491 - Compression: none
DEBUG 2023-08-23 19:58:31,491 - === End of kex handshake ===
DEBUG 2023-08-23 19:58:31,601 - kex engine KexCurve25519 specified hash_algo <built-in function openssl_sha256>
DEBUG 2023-08-23 19:58:31,602 - Switch to new keys ...
DEBUG 2023-08-23 19:58:31,603 - Got EXT_INFO: {'server-sig-algs': b'ssh-ed25519,sk-ssh-ed25519@openssh.com,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256@openssh.com'}
DEBUG 2023-08-23 19:58:31,603 - Attempting password auth...
DEBUG 2023-08-23 19:58:31,834 - userauth is OK
INFO 2023-08-23 19:58:31,957 - Auth banner: b'<<<<<<:>~ PythonAnywhere SSH. Help @ https://help.pythonanywhere.com/pages/SSHAccess\n'
INFO 2023-08-23 19:58:31,972 - Authentication (password) successful!
INFO 2023-08-23 19:58:31,977 - Hello mid tunnel
INFO 2023-08-23 19:58:31,978 - 49493
DEBUG 2023-08-23 19:58:32,020 - [chan 0] Max packet in: 32768 bytes
DEBUG 2023-08-23 19:58:33,380 - Received global request "hostkeys-00@openssh.com"
DEBUG 2023-08-23 19:58:33,380 - Rejecting "hostkeys-00@openssh.com" global request from server.
DEBUG 2023-08-23 19:58:33,522 - [chan 0] Max packet out: 32768 bytes
DEBUG 2023-08-23 19:58:33,522 - Secsh channel 0 opened.
打印完最后一行后，程序就挂起了.Ctrl+C不会导致它停止，只有垃圾箱似乎会停止.
我正在使用VSCode.我try 以管理员身份运行，没有任何变化.我已经try 了我能想到的所有方法，但除了错误，我无法得到任何不同的事情发生.我已经尽我所能地使用文档，但我对此还很陌生，我可能没有充分利用其中的信息. 我甚至试过ChatGPT，它建议我"咨询专家"…… 它检测到不正确的数据库密码这一事实告诉我们，SSH和可能的数据库连接工作正常.
任何建议都将不胜感激.