Question

我正在开发一个可以正常工作的Flask API。我现在正试图用uWSGI替换Flask开发服务器，但一切都中断了。我试图解决这个问题，因为2天，经过教程并在这里搜索但是找不到问题的解决方案。这是代码：的 app.py

import logging.config

import settings
import utils
from flask import Flask, Blueprint
from flask_restplus import Resource, Api
from flask_cors import CORS
from api.restplus import api
from api.gan.endpoints.client import ns as gan_client_namespace

# create Flask application
app = Flask(__name__)
CORS(app) # needed for cross-domain requests, allow everything by default

# load logging confoguration and create log object
logging.config.fileConfig('logging.conf')
log = logging.getLogger(__name__)

# 
@app.route("/")
def hello():
    return "Hello World!"

def __get_flask_server_params__():
    '''
    Returns connection parameters of the Flask application

    :return: Tripple of server name, server port and debug settings
    '''
    server_name = utils.get_env_var_setting('FLASK_SERVER_NAME', settings.DEFAULT_FLASK_SERVER_NAME)
    server_port = utils.get_env_var_setting('FLASK_SERVER_PORT', settings.DEFAULT_FLASK_SERVER_PORT)

    flask_debug = utils.get_env_var_setting('FLASK_DEBUG', settings.DEFAULT_FLASK_DEBUG)
    flask_debug = True if flask_debug == '1' else False

    return server_name, server_port, flask_debug

def configure_app(flask_app, server_name, server_port):
    '''
    Configure Flask application

    :param flask_app: instance of Flask() class
    '''
    flask_app.config['SERVER_NAME'] = server_name + ':' + server_port
    flask_app.config['SWAGGER_UI_DOC_EXPANSION'] = settings.RESTPLUS_SWAGGER_UI_DOC_EXPANSION
    flask_app.config['RESTPLUS_VALIDATE'] = settings.RESTPLUS_VALIDATE
    flask_app.config['RESTPLUS_MASK_SWAGGER'] = settings.RESTPLUS_MASK_SWAGGER
    flask_app.config['ERROR_404_HELP'] = settings.RESTPLUS_ERROR_404_HELP

def initialize_app(flask_app, server_name, server_port):
    '''
    Initialize Flask application with Flask-RestPlus

    :param flask_app: instance of Flask() class
    '''
    blueprint = Blueprint('tf_api', __name__, url_prefix='/tf_api')

    configure_app(flask_app, server_name, server_port)
    api.init_app(blueprint)
    api.add_namespace(gan_client_namespace)

    flask_app.register_blueprint(blueprint)

    #from werkzeug.contrib.fixers import ProxyFix
    #flask_app.wsgi_app = ProxyFix(flask_app.wsgi_app)

def main():
    server_name, server_port, flask_debug = __get_flask_server_params__()
    initialize_app(app, server_name, server_port)
    log.info(
        '>>>>> Starting TF Serving client at http://{}/ >>>>>'.format(app.config['SERVER_NAME'])
        )
    app.run(debug=flask_debug, host=server_name)

if __name__ == '__main__':
    main()

当我使用python app.py运行时，它运行正常。

Command Line Message

0.0.0.0:5001

0.0.0.0:5001/tf_api

现在我只想尝试使用uWSGI获得相同的结果：

uwsgi --http :8000 --wsgi-file app.py --callable app

命令行消息看起来很好：

Command Line Message

访问0.0.0.0:8000也可以

0.0.0.0:8000

但是，当我尝试访问API时，它失败了： 0.0.0.0:8000/tf_api

我已经尝试了一些我想到的但却无法解决这个问题。我做的一些事情是：

包含以下代码：

来自werkzeug.contrib.fixers导入ProxyFix flask_app.wsgi_app = ProxyFix（flask_app.wsgi_app）
删除app.run()（Flask Gunicorn app can't get __name__ to equal '__main__'）
将function_calls移到main函数之外，否则只有在直接运行app.py时才会调用它们，类似于（Flask application with Blueprints+uWSGI+nginx returning 404's (no routing?)）

我真的不知道还有什么问题。我发现了一个类似的问题，但它不适用于我的情况，因为它与我尚未使用的NGINX有关（How to deploy a flask-restplus app with nginx + uwgsi）。任何想法我还能尝试什么？也许我错过了一些显而易见的东西，因此没有多少睡觉。

Answer 1

wsgi服务器看不到initialize_app内部的所有内容，

import logging.config

import settings
import utils
from flask import Flask, Blueprint
from flask_restplus import Resource, Api
from flask_cors import CORS
from api.restplus import api
from api.gan.endpoints.client import ns as gan_client_namespace

# create Flask application
app = Flask(__name__)
CORS(app) # needed for cross-domain requests, allow everything by default

# load logging confoguration and create log object
logging.config.fileConfig('logging.conf')
log = logging.getLogger(__name__)

# 
@app.route("/")
def hello():
    return "Hello World!"

server_name = utils.get_env_var_setting('FLASK_SERVER_NAME', settings.DEFAULT_FLASK_SERVER_NAME)
server_port = utils.get_env_var_setting('FLASK_SERVER_PORT', settings.DEFAULT_FLASK_SERVER_PORT)

flask_debug = utils.get_env_var_setting('FLASK_DEBUG', settings.DEFAULT_FLASK_DEBUG)
flask_debug = True if flask_debug == '1' else False


app.config['SERVER_NAME'] = server_name + ':' + server_port
app.config['SWAGGER_UI_DOC_EXPANSION'] = settings.RESTPLUS_SWAGGER_UI_DOC_EXPANSION
app.config['RESTPLUS_VALIDATE'] = settings.RESTPLUS_VALIDATE
app.config['RESTPLUS_MASK_SWAGGER'] = settings.RESTPLUS_MASK_SWAGGER
app.config['ERROR_404_HELP'] = settings.RESTPLUS_ERROR_404_HELP

blueprint = Blueprint('tf_api', __name__, url_prefix='/tf_api')

api.init_app(blueprint)
api.add_namespace(gan_client_namespace)

flask_app.register_blueprint(blueprint)


def main():
    log.info(
        '>>>>> Starting TF Serving client at http://{}/ >>>>>'.format(app.config['SERVER_NAME'])
        )
    app.run(debug=flask_debug, host=server_name)

if __name__ == '__main__':
    main()

Answer 2

您正在wsgi服务器永远不会看到的函数中调用app.register_blueprint。

我猜你已经遵循某种指南，这些指南为你配置/初始化等应用程序提供了很好的功能。但它纯粹是为开发服务器所做的。

您必须在函数外部调用Blueprint和init_app，或者创建一个导入app的新wsgi.py文件，然后运行Blueprint和api.init_app命令。

无法使用uWSGI

2 个答案: