Nginx/Flask/Python应用程序，Nginx抛出502错误网关

Nginx

以前工作正常，然后我在

html

中添加了一个

form

，Nginx开始抛出这个错误：

2016/12/12 16:37:24 [error] 983#0: *3 connect() failed (111: Connection refused) while connecting to upstream, client: xx.xxx.xxx.xxx, server: site.com, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8001/", host: "site.com"

我的表单.py看起来像：

from flask_wtf import FlaskForm
from wtforms import TextField, StringField, SubmitField, validators

class EmailForm(FlaskForm):
  email = TextField("Email")
  submit = SubmitField("Send")

from flask import Flask, render_template, request
from flask_mail import Mail, Message
from forms import EmailForm

app.config['DEBUG'] = True

app = Flask(__name__)
app.secret_key = 'secrets'

# add mail server config
app.config['MAIL_SERVER'] = 'site.com'
app.config['MAIL_PORT'] = 465
app.config['MAIL_USE_SSL'] = True
app.config['MAIL_USERNAME'] = 'contact@site.com'
app.config['MAIL_PASSWORD'] = 'pass'

mail = Mail(app)

@app.route('/', methods=('GET', 'POST'))
def email():
    form = EmailForm()

    if request.method == 'POST':
        if form.validate() == False:
            return 'Please fill in all fields <p><a href="/">Try Again</a></p>'
        else:
            msg = Message("Message from your visitor",
                          sender='contact@site.com',
                          recipients=['contact@site.com'])
           msg.body = """
            From: %s <%s>,
            %s
            """ % (form.email.data)
            mail.send(msg)
            return "Successfully  sent message!"
    elif request.method == 'GET':
        return render_template('index.html', form=form)

if __name__ == '__main__':
    app.run()

我的app.py看起来像：

from flask_wtf import FlaskForm
from wtforms import TextField, StringField, SubmitField, validators

class EmailForm(FlaskForm):
  email = TextField("Email")
  submit = SubmitField("Send")

from flask import Flask, render_template, request
from flask_mail import Mail, Message
from forms import EmailForm

app.config['DEBUG'] = True

app = Flask(__name__)
app.secret_key = 'secrets'

# add mail server config
app.config['MAIL_SERVER'] = 'site.com'
app.config['MAIL_PORT'] = 465
app.config['MAIL_USE_SSL'] = True
app.config['MAIL_USERNAME'] = 'contact@site.com'
app.config['MAIL_PASSWORD'] = 'pass'

mail = Mail(app)

@app.route('/', methods=('GET', 'POST'))
def email():
    form = EmailForm()

    if request.method == 'POST':
        if form.validate() == False:
            return 'Please fill in all fields <p><a href="/">Try Again</a></p>'
        else:
            msg = Message("Message from your visitor",
                          sender='contact@site.com',
                          recipients=['contact@site.com'])
           msg.body = """
            From: %s <%s>,
            %s
            """ % (form.email.data)
            mail.send(msg)
            return "Successfully  sent message!"
    elif request.method == 'GET':
        return render_template('index.html', form=form)

if __name__ == '__main__':
    app.run()

在

站点中启用nginx配置

：

server {
   server_name mysite.com;
   listen 80;
    location / {
        proxy_pass http://localhost:8001;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }
    location /static {
        alias  /home/www/flask-deploy/mysite/static/;
    }
}

我不知疲倦地研究了这一点，但似乎无法找出问题所在。有人知道我做错了什么吗

谢谢。

“连接被拒绝”表示Nginx在本地主机端口8001上找不到任何正在侦听的内容。可能您的flask应用程序正在另一个端口上侦听。默认情况下，flask侦听端口5000

您可以尝试：

• 要修改nginx conf:

  proxy\u passhttp://localhost:5000;

• 或使flask应用程序在端口8001上侦听：

  app.config['SERVER\u NAME']=“127.0.0.1:8001”

---

我们需要您的nginx配置的相关部分…请参见上文@StephaneMartinnginx说它找不到任何人在本地主机端口8001上侦听。您在

msg.body=“”

之后出现缩进问题。因此，可能您的python脚本根本没有运行？这只是它粘贴的方式。我验证了

msg.body

信息位于同一行上，端口8001？在flask中，默认值为5000