在apache和mod_wsgi上的python烧瓶中创建文件时拒绝权限错误

Question

我试图通过python flask创建一个csv文件。该代码在localhost中运行良好，但在aws ec2实例上的apache mod\u wsgi上部署时会出现权限拒绝错误。

@app.route('/downloadChats/<db_token>/<requestrange>/', methods = ['GET'])
def downloadChats(db_token, requestrange):

   <fetch data from table>

    try:
            filename = str(time.time()).strip().split('.')[0] + '.csv'
            df = pd.DataFrame(columns = ['sessionid', 'city', 'ipAddress', 'startTime', 'timestamp', 'name', 'mob_no'])
            for sessid in sessionids:
                    df = df.append({'sessionid' : disp_json[sessid]['sessionid'], 'city' : disp_json[sessid]['city'], 'ipAddress' : disp_j$
            df.to_csv(filename, index = False)
    except Exception as msg:
            print("Exception while writing csv file in downloadChats : " + str(msg))
            return "<h1> THis service is unavailable currently, Please try later. </h1> "
    return send_from_directory('/var/www/FlaskApps/chatbotApp/', filename, as_attachment=True)

应用程序配置文件为：

   <VirtualHost *:80>
       ServerName example1.example.com
       ServerAdmin [e-mail]
       WSGIScriptAlias / /var/www/FlaskApps/FlaskApps.wsgi
       WSGIPassAuthorization On
       <Directory /var/www/FlaskApps/chatbotApp/>
         Order allow,deny
         Allow from all
         </Directory>
       <Directory /var/www/FlaskApps/chatbotApp/static/>
         Order allow,deny
         Allow from all
       </Directory>

       ErrorLog ${APACHE_LOG_DIR}/error.log
       LogLevel warn
       CustomLog ${APACHE_LOG_DIR}/access.log combined
       RewriteEngine on
       RewriteCond %{SERVER_NAME} = example1.example.com
       RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} 
       [END,NE,R=permanent]
    </VirtualHost>

wsgi配置文件为：import sys导入日志

logging.basicConfig(stream=sys.stderr)
sys.path.insert(0,"/var/www/FlaskApps/chatbotApp/")

# home points to the home.py file
from home import app as application
application.secret_key = "somesecretsessionkey"

错误：

[Errno 13] Permission denied: '1518497209.csv'

Answer 1

您不能使用相对路径名，因为进程的工作目录将不在代码所在的位置。mod_wsgi文档中解释了这一点以及需要执行的操作，网址为：

• http://modwsgi.readthedocs.io/en/develop/user-guides/application-issues.html#application-工作目录