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[已解决]Flask中用gunicorn和Nginx出错:Internal Server Error,TypeError: hello() takes no arguments (2 given)

Flask crifan 3278浏览 0评论

折腾:

[已解决]Flask中用gunicorn和Nginx出错:502 Bad Gateway

期间,把配置文件改为:

(SIPEvents) ➜  conf.d cat default.conf
server {
    listen 80;
    server_name 115.29.173.126;
    access_log  /var/log/nginx/access.log;
    error_log  /var/log/nginx/error.log;
    location / {
        proxy_pass         http://127.0.0.1:8080/;
        proxy_redirect     off;
        proxy_set_header   Host                 $host;
        proxy_set_header   X-Real-IP            $remote_addr;
        proxy_set_header   X-Forwarded-For      $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto    $scheme;
    }
}
(SIPEvents) ➜  conf.d pwd
/etc/nginx/conf.d

重启nginx。然后再去:

(SIPEvents) ➜  SIPEvents gunicorn -w 4 -b 127.0.0.1:8080 app:hello
[2016-08-18 17:24:08 +0000] [20442] [INFO] Starting gunicorn 19.6.0
[2016-08-18 17:24:08 +0000] [20442] [INFO] Listening at: http://127.0.0.1:8080 (20442)
[2016-08-18 17:24:08 +0000] [20442] [INFO] Using worker: sync
[2016-08-18 17:24:08 +0000] [20447] [INFO] Booting worker with pid: 20447
[2016-08-18 17:24:08 +0000] [20448] [INFO] Booting worker with pid: 20448
[2016-08-18 17:24:09 +0000] [20453] [INFO] Booting worker with pid: 20453
[2016-08-18 17:24:09 +0000] [20454] [INFO] Booting worker with pid: 20454

终于,至少,有变化了:

http://115.29.173.126/

Internal Server Error

然后log输出:

[2016-08-18 17:24:16 +0000] [20447] [ERROR] Error handling request /
Traceback (most recent call last):
  File "/root/Envs/SIPEvents/lib/python2.7/site-packages/gunicorn/workers/sync.py", line 135, in handle
    self.handle_request(listener, req, client, addr)
  File "/root/Envs/SIPEvents/lib/python2.7/site-packages/gunicorn/workers/sync.py", line 176, in handle_request
    respiter = self.wsgi(environ, resp.start_response)
TypeError: hello() takes no arguments (2 given)

flask gunicorn nginx Internal Server Error

flask gunicorn nginx TypeError: hello() takes no arguments (2 given)

python – Flask + uwsgi + nginx: TypeError: … takes no arguments (2 given) – Stack Overflow

(SIPEvents) ➜  SIPEvents cat app.py
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
    return "Hello Flask and uWSGI!"
if __name__ == "__main__":
    app.run(host=’0.0.0.0′, port=8080)

去把app.run中的参数:

app.run(host=’0.0.0.0′, port=8080)

去掉,换成:

app.run()

(SIPEvents) ➜  SIPEvents cat app.py
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
    return "Hello Flask and uWSGI!"
if __name__ == "__main__":
    app.run()

再去运行试试

结果错误依旧。

TypeError: session() takes no arguments (2 given) · Issue #172 · Diaoul/subliminal

gunicorn  TypeError: hello() takes no arguments (2 given)

python – Gunicorn Internal Server Error – Stack Overflow

去换成:

gunicorn -w 4 -b 127.0.0.1:8080 app:app

(SIPEvents) ➜  SIPEvents gunicorn -w 4 -b 127.0.0.1:8080 app:app  
[2016-08-18 17:37:36 +0000] [20635] [INFO] Starting gunicorn 19.6.0
[2016-08-18 17:37:36 +0000] [20635] [INFO] Listening at: http://127.0.0.1:8080 (20635)
[2016-08-18 17:37:36 +0000] [20635] [INFO] Using worker: sync
[2016-08-18 17:37:36 +0000] [20640] [INFO] Booting worker with pid: 20640
[2016-08-18 17:37:36 +0000] [20641] [INFO] Booting worker with pid: 20641
[2016-08-18 17:37:36 +0000] [20642] [INFO] Booting worker with pid: 20642
[2016-08-18 17:37:37 +0000] [20643] [INFO] Booting worker with pid: 20643

然后终于工作了:

http://115.29.173.126/

[总结]

此处的:

不论是uwsgi还是gunicorn,中的module和callable,对于这种代码:

(SIPEvents) ➜  SIPEvents cat app.py
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
    return "Hello Python Flask gunicorn !"
if __name__ == "__main__":
    app.run()

即Flask的程序的名字是:(文件名app.py中的文件名)app

而程序内部的,可以被调用的==callable,是:app

对应着:

app = Flask(__name__)

-》所生成的Flask的实例的名字

可以理解为:

gunicorn Flask中py的文件名:py文件内部的Flask的实例的名字

即可正常调用。

此时,先去找:

app.py

然后再找到

app.py中的app,这个Flask的实例

针对于

/

这个路由,调用对应的hello去输出对应的内容:

Hello Python Flask gunicorn !

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