Caddy reverse_proxy 不适用于 Python Flask 服务器

编程问答 2022-05-25

问题描述

我正在尝试使用 Caddy 作为在端口 5000 上运行的 Python/Flask/Gunicorn API 服务器的反向代理。

当我使用浏览器访问 http://myipaddress:5000 时，我看到 API 服务器的响应符合预期。但是，当我访问 http://myipaddress/api 时，我们得到的不是完全相同的响应，而是显示一个错误页面：

未找到 在服务器上找不到请求的 URL。如果您手动输入网址，请检查拼写并重试。

可能导致此问题的原因是什么，我们该如何解决？

/root/path/to/Caddyfile

:80 {

    reverse_proxy /api*  0.0.0.0:5000 {
        header_up Host {http.request.host}
        header_up X-Real-IP {http.request.remote}
        header_up X-Forwarded-For {http.request.remote}
        header_up X-Forwarded-Port {http.request.port}
        header_up X-Forwarded-Proto {http.request.scheme}
    }


    log {
        output file /var/log/caddy/access.log {
                roll_size 1mb
                roll_keep 4
                roll_keep_for 24h
        }
    }
}

尝试运行

caddy reload --config ~/path/to/Caddyfile

给出了输出

# caddy reload --config ~/path/to/Caddyfile
2021/02/19 06:56:01.742 INFO    using provided configuration    {"config_file": "/root/path/to/Caddyfile","config_adapter": ""}
2021/02/19 06:56:01.748 INFO    admin.api   received request    {"method": "POST","host": "localhost:2019","uri": "/load","remote_addr": "127.0.0.1:49868","headers": {"Accept-Encoding":["gzip"],"Content-Length":["676"],"Content-Type":["application/json"],"Origin":["localhost:2019"],"User-Agent":["Go-http-client/1.1"]}}
2021/02/19 06:56:01.748 INFO    admin.api   config is unchanged
2021/02/19 06:56:01.748 INFO    admin.api   load complete

/var/log/caddy/access.log

2021/02/19 07:01:58.132 error   http.log.access.log0    handled request {"request": {"remote_addr": "173.123.123.123:60236","proto": "HTTP/1.1","method": "GET","host": "164.123.123.123","uri": "/api","headers": {"Connection": ["keep-alive"],"Cache-Control": ["max-age=0"],"Upgrade-Insecure-Requests": ["1"],"User-Agent": ["Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1_0) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/87.0.4280.101 Safari/537.36"],"Accept-Encoding": ["gzip,deflate"],"Accept": ["text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9"],"Sec-Gpc": ["1"],"Accept-Language": ["en-US,en;q=0.9"]}},"common_log": "173.123.123.123 - - [19/Feb/2021:07:01:58 +0000] \"GET /api HTTP/1.1\" 404 232","duration": 0.002260348,"size": 232,"status": 404,"resp_headers": {"Server": ["Caddy","meinheld/1.0.2"],"Content-Length": ["232"],"Access-Control-Allow-Origin": ["*"],"Date": ["Fri,19 Feb 2021 07:01:58 GMT"],"Content-Type": ["text/html; charset=utf-8"]}}
2021/02/19 07:01:58.421 info    http.log.access.log0    handled request {"request": {"remote_addr": "173.123.123.123:60236","uri": "/favicon.ico","headers": {"Sec-Gpc": ["1"],"Referer": ["http://164.123.123.123/api"],"Connection": ["keep-alive"],"Cache-Control": ["no-cache"],en;q=0.9"],"Pragma": ["no-cache"],"Accept": ["image/avif,image/*,*/*;q=0.8"]}},"common_log": "173.123.123.123 - - [19/Feb/2021:07:01:58 +0000] \"GET /favicon.ico HTTP/1.1\" 0 0","duration": 0.000009084,"size": 0,"status": 0,"resp_headers": {"Server": ["Caddy"]}}

解决方法

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