排除 MacOS 上的 localhost/apache - 连接被拒绝错误

Question

我正在尝试调试 localhost 连接拒绝错误。对于上下文，我有一个 Flask 应用程序，我试图在本地运行。我使用 gunicorn 启动应用程序，并注意到它正在端口 8000 上运行。

Starting gunicorn 20.1.0
[2022-02-24 05:38:49 -0800] [21269] [INFO] Listening at: http://127.0.0.1:8000 (21269)
[2022-02-24 05:38:49 -0800] [21269] [INFO] Using worker: sync
[2022-02-24 05:38:49 -0800] [21271] [INFO] Booting worker with pid: 21271

我尝试了几件事，包括：

1. 重新启动 apache 服务器 - sudo apachectl restart
2. 刷新 dns: sudo Killall -HUP mDNSResponder;sudo Killall mDNSResponderHelper;sudo dscacheutil -flushcache
3. 运行httpd

    AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using MacBook-Air-2020.local. Set the 'ServerName' directive globally to suppress this message
    (48)Address already in use: AH00072: make_sock: could not bind to address [::]:80
    (48)Address already in use: AH00072: make_sock: could not bind to address 0.0.0.0:80
    no listening sockets available, shutting down

4. telnet 127.0.0.1

    Trying 127.0.0.1...
    telnet: connect to address 127.0.0.1: Connection refused
    telnet: Unable to connect to remote host

5. 当我在浏览器中输入 http://127.0.0.1/ 时，我得到

It Works!

我还能尝试什么？我正在使用 gunicorn 服务器在本地部署/运行应用程序。

Answer 1

这对我来说很有效：

sudo killall -HUP mDNSResponder;sudo killall mDNSResponderHelper;sudo dscacheutil -flushcache