I was not able to implement a working minimal example with the Python Micro-Webframework Flask using a neo4j graphdatabase via the embedded python bindings (neo4j / python-embedded, version 1.6). What I have (on the basis of this Stack-Overflow-thread) is:
import os
import jpype
from neo4j import GraphDatabase
from flask import Flask, g
# configuration
DATABASE = 'graphdatabase'
DEBUG = True
SECRET_KEY = 'blubber'
USERNAME = 'tobias'
PASSWORD = 'bla'
ADMIN = 'admin'
app = Flask(__name__)
app.config.from_object(__name__)
def connectDB():
return GraphDatabase(app.config['DATABASE'])
def initDB():
db = connectDB()
with db.transaction:
users = db.node()
userIndex = db.node.indexes.create('users')
user = db.node(name=app.config['ADMIN'])
userIndex['name'][app.config['ADMIN']] = user
db.shutdown()
print "Database initialized."
#app.before_request
def before_request():
jpype.attachThreadToJVM()
g.db = connectDB()
#app.teardown_request
def teardown_request(exception):
jpype.attachThreadToJVM()
g.db.shutdown()
#app.route('/')
def index():
with g.db.transaction:
userIndex = g.db.node.indexes.get('users')
user = userIndex['name'][app.config['ADMIN']].single
username = user['name']
return render_template('index.html', name=username)
if os.path.exists(app.config['DATABASE']) == False:
initDB()
if __name__ == '__main__':
app.run()
Unfortunately, it throws:
File "/home/tobias/Esk/Dev/adhocracyLight/venv/lib/python2.7/site-packages/flask/app.py", line 1518, in __call__
return self.wsgi_app(environ, start_response)
File "/home/tobias/Esk/Dev/adhocracyLight/venv/lib/python2.7/site-packages/flask/app.py", line 1506, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/home/tobias/Esk/Dev/adhocracyLight/venv/lib/python2.7/site-packages/flask/app.py", line 1504, in wsgi_app
response = self.full_dispatch_request()
File "/home/tobias/Esk/Dev/adhocracyLight/venv/lib/python2.7/site-packages/flask/app.py", line 1264, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/tobias/Esk/Dev/adhocracyLight/venv/lib/python2.7/site-packages/flask/app.py", line 1262, in full_dispatch_request
rv = self.dispatch_request()
File "/home/tobias/Esk/Dev/adhocracyLight/venv/lib/python2.7/site-packages/flask/app.py", line 1248, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/home/tobias/Esk/Dev/adhocracyLight/adhocracyLight.py", line 73, in index
userIndex = g.db.node.indexes.get('users')
File "/home/tobias/Esk/Dev/adhocracyLight/venv/lib/python2.7/site-packages/neo4j/index.py", line 36, in get
return self._index.forNodes(name)
java.lang.RuntimeExceptionPyRaisable: java.lang.IllegalArgumentException: No index provider 'lucene' found. Maybe the intended provider (or one more of its dependencies) aren't on the classpath or it failed to load.
I guess the problem is due to the threading (g is thread-local and contains a pointer to the neo4j-Database, maybe that's a bad idea?).
Neo4j Embedded is not intended to be used in a Web server environment -- you should use Neo4j Server and a Neo4j Server client.
Bulbs (http://bulbflow.com) is a Neo4j Server client that was designed with Flask in mind, in fact bulbflow.com is running on Flask on Heroku, using the Neo4j Heroku Add On (which is currently free).
You use Gremlin or Cypher for queries and transactional requests.
For an example of how to structure your app, see the Lightbulb (https://github.com/espeed/lightbulb) blog example, esp:
https://github.com/espeed/lightbulb/blob/master/lightbulb/model.py
https://github.com/espeed/lightbulb/blob/master/lightbulb/bulbsconf.py
Notice this line in bulbsconf.py:
bulbs_config.set_neo4j_heroku()
Lightbulb is designed to run on Heroku with the Neo4j Heroku Add On -- leave that line out if you are not running on Heroku.
Then in your Flask views or your app.py, do:
from bulbsconf import graph
Related
I've been having a hard time handling sessions in flask. Since when I manage the application in the local environment everything works perfectly, including flask sessions. But when i already host it in Render i always get this error in every route.
[55] [ERROR] Error handling request /valle-de-guadalupe
Traceback (most recent call last):
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask/app.py", line 2525, in wsgi_app
response = self.full_dispatch_request()
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask/app.py", line 1822, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask/app.py", line 1820, in full_dispatch_request
rv = self.dispatch_request()
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask/app.py", line 1796, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File "/opt/render/project/src/app_folder/routes/public.py", line 35, in valle_de_guadalupe
return render_template("public/cities/valle_guadalupe.html")
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask/templating.py", line 147, in render_template
return _render(app, template, context)
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask/templating.py", line 128, in _render
app.update_template_context(context)
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask/app.py", line 994, in update_template_context
context.update(func())
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask_login/utils.py", line 407, in _user_context_processor
return dict(current_user=_get_user())
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask_login/utils.py", line 372, in _get_user
current_app.login_manager._load_user()
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask_login/login_manager.py", line 364, in _load_user
user = self._user_callback(user_id)
File "/opt/render/project/src/app.py", line 52, in load_user
return User.get_by_id(int(user_id))
File "/opt/render/project/src/app_folder/models/models.py", line 82, in get_by_id
return User.query.get(id)
File "<string>", line 2, in get
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/sqlalchemy/util/deprecations.py", line 402, in warned
return fn(*args, **kwargs)
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 947, in get
return self._get_impl(ident, loading.load_on_pk_identity)
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 959, in _get_impl
execution_options=self._execution_options,
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 2959, in _get_impl
load_options=load_options,
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/sqlalchemy/orm/loading.py", line 534, in load_on_pk_identity
bind_arguments=bind_arguments,
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/sqlalchemy/orm/session.py", line 1702, in execute
bind = self.get_bind(**bind_arguments)
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask_sqlalchemy/session.py", line 61, in get_bind
engines = self._db.engines
File "/opt/render/project/src/.venv/lib/python3.7/site-packages/flask_sqlalchemy/extension.py", line 629, in engines
return self._app_engines[app]
File "/usr/local/lib/python3.7/weakref.py", line 396, in __getitem__
return self.data[ref(key)]
KeyError: <weakref at 0x7fc9e8267ad0; to 'Flask' at 0x7fc9e9ec5750>
index.py
from app import app
from app_folder.utils.db import db
db.init_app(app)
with app.app_context():
db.create_all()
if __name__ == "__main__":
app.run(
debug = False,
port = 5000
)
app.py
from flask import Flask
"""Flask SqlAlchemy"""
from flask_sqlalchemy import SQLAlchemy
"""Flask Login"""
from flask_login import LoginManager
"""Dot Env"""
from dotenv import load_dotenv
"""App Folder Routes"""
from app_folder.handlers.stripe_handlers import stripe_error
from app_folder.handlers.web_handlers import web_error
from app_folder.models.models import User
from app_folder.routes.admin import admin
from app_folder.routes.public import public
from app_folder.routes.users import users
from app_folder.utils.db import db
"""Imports"""
import os
import stripe
load_dotenv()
"""config app"""
app = Flask(__name__,
static_url_path="",
template_folder="app_folder/templates",
static_folder="app_folder/static")
app.config['SECRET_KEY'] = os.getenv("SECRET_KEY")
app.config['SQLALCHEMY_DATABASE_URI'] = os.getenv("SQLALCHEMY_DATABASE_VERSION")+os.getenv("SQLALCHEMY_USERNAME")+":"+os.getenv("SQLALCHEMY_PASSWORD")+"#"+os.getenv("SQLALCHEMY_SERVER")+"/"+os.getenv("SQLALCHEMY_DATABASE")
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = os.getenv("SQLALCHEMY_TRACK_MODIFICATIONS")
"""blueprints"""
app.register_blueprint(stripe_error)
app.register_blueprint(web_error)
app.register_blueprint(admin)
app.register_blueprint(public)
app.register_blueprint(users)
SQLAlchemy(app)
login_manager = LoginManager(app)
""" stripe """
stripe_keys = {
'secret_key': os.getenv("STRIPE_SECRET_KEY"),
'publishable_key': os.getenv("STRIPE_PUBLISHABLE_KEY")
}
stripe.api_key = stripe_keys['secret_key']
"""Login Manager"""
#login_manager.user_loader
def load_user(user_id):
return User.get_by_id(int(user_id))
"""Teardown"""
#app.teardown_appcontext
def shutdown_session(exception=None):
db.session.remove()
Regardless of which route i'm on, while handling sessions I get the same error, but in this case use this path.
public.py
"""routes"""
#public.route("/", methods=["GET", "POST"])
def index():
return redirect(url_for('public.valle_de_guadalupe'))
"""cities"""
#public.route("/valle-de-guadalupe", methods=["GET", "POST"])
def valle_de_guadalupe():
return render_template("public/cities/valle_guadalupe.html")
I don't know if this has happened to someone else.
It's usually best to remove as many extra components and identify a minimal example that produces the error, otherwise it's often hard to help.
That said, I think that error suggests that db (SQLAlachemy() from flask-sqlalchemy) is not being inited with app.
I'm not sure what the db is that is being imported from app_folder.utils.db, but it appears that you may need to call db.init_app(app).
Relatedly, the line SQLAlchemy(app) is not being assigned. Perhaps you meant to assign that to db?
Other people report that this issue happens since the upgrade from flask-sqlalchemy v2.5.1 to v3. So downgrading might be a work around (not a permanent solution)
Source
I'm trying to build a simple contact form with Flask and hosting it on GAE but I can't seem to get it right.
I'd truly appreciate your help because I've spent several days trying to figure this out without any success.
Here's the error I get when I click submit:
Internal Server Error
The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.
And here are the logs:
2022-02-14 23:03:33 default[20220215t000150] Traceback (most recent call last):
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/flask/app.py", line 2073, in wsgi_app response = self.full_dispatch_request()
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/flask/app.py", line 1518, in full_dispatch_request rv = self.handle_user_exception(e)
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/flask/app.py", line 1516, in full_dispatch_request rv = self.dispatch_request()
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/flask/app.py", line 1502, in dispatch_request return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
File "/srv/main.py", line 34, in contact message.send() File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/appengine/api/mail.py", line 1209, in send make_sync_call('mail', self._API_CALL, message, response)
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/appengine/api/apiproxy_stub_map.py", line 96, in MakeSyncCall return stubmap.MakeSyncCall(service, call, request, response)
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/appengine/api/apiproxy_stub_map.py", line 355, in MakeSyncCall rpc.CheckSuccess()
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/appengine/api/apiproxy_rpc.py", line 149, in CheckSuccess raise self.exception
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/appengine/runtime/default_api_stub.py", line 267, in _CaptureTrace f(**kwargs)
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/appengine/runtime/default_api_stub.py", line 260, in _SendRequest raise self._TranslateToError(parsed_response) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/appengine/runtime/default_api_stub.py", line 134, in _TranslateToError raise self._ErrorException(exception_type, msg) google.appengine.runtime.apiproxy_errors.FeatureNotEnabledError: The API call mail.Send() is currently not enabled. -- Additional details from server: App Engine APIs are not enabled, please add app_engine_apis: true to your app.yaml to enable.
Here's my main.py:
from flask import Flask, redirect, render_template, url_for
from flask_wtf import FlaskForm
from wtforms import StringField, SubmitField
from wtforms.validators import DataRequired
from flask_talisman import Talisman
from google.appengine.api import mail, wrap_wsgi_app
app = Flask(__name__)
app.config['SECRET_KEY'] = 'my-very-very-secret-key'
app.wsgi_app = wrap_wsgi_app(app.wsgi_app)
Talisman(app)
EMAIL_ADDR = 'my_email#example.com'
class ContactForm(FlaskForm):
name = StringField(label='Name', validators=[DataRequired()])
submit = SubmitField(label='Submit')
#app.route('/')
def homepage():
return render_template('index.html')
#app.route('/contact', methods=['GET', 'POST'])
def contact():
form = ContactForm()
if form.validate_on_submit():
name = form.name.data
message = mail.EmailMessage(sender=EMAIL_ADDR,
subject='form test')
message.body = f'this is a test message from {name}'
message.to = EMAIL_ADDR
message.send()
return redirect(url_for('homepage'))
return render_template('contact.html', form=form)
if __name__ == '__main__':
app.run()
My app.yaml
runtime: python39
app_engine_apis: true
inbound_services:
- mail
- mail_bounce
My requirements.txt
Flask==2.0.2
flask-talisman==0.8.1
wtforms==3.0.0
Flask-WTF==1.0.0
appengine-python-standard>=0.3.1
I've stumbled upon the solution! If anyone else runs into this issue: 'gcloud beta app deploy' solves it. I used to deploy the app with 'gcloud app deploy' before.
I'm building an SMS based chatbot using Python, Twilio, Flask, IBM Watson and Google App Engine. It works fine for a few minutes but then inevitably sends up an Internal Response Error.
I've tried editing the yaml file so it has a default expiration of 1 day. It doesn't do anything.
Edit: Currently on automatic scaling, but I've tried changing from autmatic to basic scaling, and changing min_instances to 1.
Here's the log:
2019-07-06 08:57:09 default[20190706t180659]
Traceback (most recent call last):
File "/env/lib/python3.7/site-packages/flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "/env/lib/python3.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/env/lib/python3.7/site-packages/flask/app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/env/lib/python3.7/site-packages/flask/_compat.py", line 35, in reraise
raise value
File "/env/lib/python3.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/env/lib/python3.7/site-packages/flask/app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/srv/main.py", line 81, in incoming_sms
r = Watson(b)
File "/srv/main.py", line 42, in Watson
input = message_input
File "/srv/ibm_watson/assistant_v2.py", line 244, in message
accept_json=True)
File "/srv/ibm_cloud_sdk_core/base_service.py", line 358, in request
raise ApiException(response.status_code, error_message, http_response=response)
ibm_cloud_sdk_core.api_exception.ApiException: Error: NotFound: session id 2900da9f-dd77-480a-a939-1a5b060b3f82 for agent instance 6656a86c-ad0e-4463-8344-5f7fdcb4a6fe, Code: 404 , X-global-transaction-id: 5a3699f1cd4e3409e9f89f4fcd87735f
Code to take inputs on Twilio, feed them through Watson and respond.
from flask import Flask, request, make_response
from twilio.twiml.messaging_response import MessagingResponse
import os
from twilio import twiml
import ibm_watson
# Set up Assistant service.
service = ibm_watson.AssistantV2(
iam_apikey = 'xxx', # replace with API key
version = '2019-02-28',
url = 'https://gateway-syd.watsonplatform.net/assistant/api')
assistant_id = 'xxx' #Under Assistant Settings
# Create session.
session_id = service.create_session(
assistant_id = assistant_id
).get_result()['session_id']
def Watson(b):
# Initialize with empty value to start the conversation.
message_input = {
'message_type:': 'text',
'text': str(b)
}
# Main input/output loop
while message_input['text'] != 'quitt':
# Send message to assistant.
response = service.message(
assistant_id,
session_id,
input = message_input
).get_result()
# If an intent was detected, print it to the console.
if response['output']['intents']:
print('Detected intent: #' + response['output']['intents'][0]['intent'])
# Print the output from dialog, if any. Supports only a single
# text response.
if response['output']['generic']:
if response['output']['generic'][0]['response_type'] == 'text':
return(response['output']['generic'][0]['text'])
# Prompt for next round of input.
message_input = {
'text': str(b)
}
# We're done, so we delete the session.
service.delete_session(
assistant_id = assistant_id,
session_id = session_id
)
app = Flask(__name__)
#app.route("/sms", methods=['GET', 'POST'])
def incoming_sms():
"""Send a dynamic reply to an incoming text message"""
#Get the message the user sent our Twilio number
body = request.values.get('Body', None)
b = str(body)
b = b.lower()
resp = MessagingResponse()
r = Watson(b)
resp.message(r)
# response.append(r)
return str(resp)
if __name__ == "__main__":
app.run(debug=True)
You're getting an exception from the ibm_cloud_sdk_core package. This could possibly be due to App Engine scaling up to multiple instances, but session IDs not being shared across instances. So instance A might have a session ID, but a subsequent request might go to instance B which does not have this session ID.
You should reach out to the library maintainers to understand how to either pool session IDs, or determine whether you have a valid session ID for a request before making the request to their API.
This question already has an answer here:
Import Flask extension when it is created in an app factory [duplicate]
(1 answer)
Closed 4 years ago.
When following tutorials the #ask decorator works when it is in the same file as ask = Ask(app, "/someroute") and after app = Flask(name). If I wish to put the #ask decorators in a view file in its own folder, using Blueprints no matter what I try I get "name 'ask' is not defined" with the decorator
I should say I am new to flask, but have now got a base app working with things like flask-principal working with flask-login and flask-navigation able to display menu items only if permitted.
I have been following the many flask-ask tutorials and everything works (so far), but I would prefer to have the view code in a separate views.py in its own folder and use Blueprints. I using create_app(config_name) instead of app = Flask(name) as suggested in many flask tutorials. I wish to do this as I want to keep my main __init__.py as clean as possible.
My newness to flask prevents me from doing something like using the alexa-skills-kit-sdk-for-python in flask as suggested by some people on Gitter (as flask-ask doesn't seem to be maintained anymore) and I still don't understand flask enough to work out why the ask object is not available in a separate views.py
In all truth I am tempted just to have everything in app/__init__.py as this is only a hobby app, but I am trying to structure my flask apps as suggested by many blogs, i.e. if there is no obvious fix for this then I will resort to the way that works, but I can't help feeling this is something I have done wrong from a flask perspective not flask-ask.
It may be worth adding that I had some install problems (choking on PyYAML, so I downloaded the package and manually installed the requirements then run setup.py (just in case that had an impact on the issue)
#app/__init__.py
#Pytho 3
from flask_ask import Ask, statement, question, session
....
def create_app(config_name):
app = Flask(__name__, instance_relative_config=True)
app.config.from_object(app_config[config_name])
app.config.from_pyfile('config.py')
Bootstrap(app)
db.init_app(app)
nav.init_app(app)
toolbar.init_app(app)
login_manager.init_app(app)
login_manager.login_message = "You must be logged in to access this page."
login_manager.login_view = "auth.login"
principals = Principal(app)
ask = Ask(app, "/alexa")
ask.init_app(app) #have also done it without this as some of the tutorials don't mention it
from .auth import auth as auth_blueprint
app.register_blueprint(auth_blueprint)
from .home import home as home_blueprint
app.register_blueprint(home_blueprint)
from .alexa import alexa as alexa_blueprint
app.register_blueprint(alexa_blueprint,url_prefix='/alexa')
# This loads fine
#ask.launch
def start_skill():
welcome_message = 'Hello there, would you like the news?'
return question(welcome_message)
If I remove the #ask decorator code and put it as below....
#app/alexa/views.py
from flask_ask import Ask, statement, question, session
import json
import requests
import time
import unidecode
from . import alexa
#alexa.route('/')
def alexa_route():
return('alexa')
#this doesn't work
#ask.launch # this is on line 33 (as below error)
def start_skill():
welcome_message = 'Hello there, would you like the news?'
return question(welcome_message)
I get (I am using venv so the paths are to a virtual environment)
File "/Users/username/Documents/Personal/Pi/template/lib/python3.7/site-packages/flask/app.py", line 2309, in call
return self.wsgi_app(environ, start_response)
File "/Users/username/Documents/Personal/Pi/template/lib/python3.7/site-packages/flask/app.py", line 2295, in wsgi_app
response = self.handle_exception(e)
File "/Users/username/Documents/Personal/Pi/template/lib/python3.7/site-packages/flask/app.py", line 1741, in handle_exception
reraise(exc_type, exc_value, tb)
File "/Users/username/Documents/Personal/Pi/template/lib/python3.7/site-packages/flask/_compat.py", line 35, in reraise
raise value
File "/Users/username/Documents/Personal/Pi/template/lib/python3.7/site-packages/flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "/Users/username/Documents/Personal/Pi/template/lib/python3.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/username/Documents/Personal/Pi/template/lib/python3.7/site-packages/flask/app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/username/Documents/Personal/Pi/template/lib/python3.7/site-packages/flask/_compat.py", line 35, in reraise
raise value
File "/Users/username/Documents/Personal/Pi/template/lib/python3.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/username/Documents/Personal/Pi/template/lib/python3.7/site-packages/flask_debugtoolbar/init.py", line 125, in dispatch_request
return view_func(**req.view_args)
File "/Users/username/Documents/Personal/Pi/baseapp/app/alexa/views.py", line 33, in alexa_route
return(ask)
NameError: name 'ask' is not defined
When using flask's app-factory, you should create the module's object outside of create_app :
#my_app/__init__.py
from flask_ask import Ask, statement, question, session
...
ask = Ask()
def create_app(config_name):
app = Flask(...)
...
ask.init_app(app)
Then you can import the object whenever you need it :
#my_app/alexa/views.py
from my_app import ask
...
#ask.launch
def start_skill():
welcome_message = 'Hello there, would you like the news?'
return question(welcome_message)
Beware of naming your app "app" as this can be confusing. I took the freedom to change it to 'my_app' for more clarity.
This is my code for my main.py file which is designed to be a simple contact form built in flask.
from flask import Flask, render_template, request
from flask_mail import Mail, Message
from forms import ContactForm
app = Flask(__name__)
app.secret_key = 'YourSuperSecreteKey'
# add mail server config
app.config['MAIL_SERVER'] = 'smtp.gmail.com'
app.config['MAIL_PORT'] = 465
app.config['MAIL_USE_SSL'] = True
app.config['MAIL_USERNAME'] = 'YourUser#NameHere'
app.config['MAIL_PASSWORD'] = 'yourMailPassword'
mail = Mail(app)
#app.route('/')
def hello():
"""Return a friendly HTTP greeting."""
return 'Hello World!'
#app.errorhandler(404)
def page_not_found(e):
"""Return a custom 404 error."""
return 'Sorry, Nothing at this URL.', 404
#app.errorhandler(500)
def application_error(e):
"""Return a custom 500 error."""
return 'Sorry, unexpected error: {}'.format(e), 500
#app.route('/contact', methods=('GET', 'POST'))
def contact():
form = ContactForm()
if request.method == 'POST':
if form.validate() == False:
return 'Please fill in all fields <p>Try Again!!!</p>'
else:
msg = Message("Message from your visitor" + form.name.data,
sender='YourUser#NameHere',
recipients=['yourRecieve#mail.com', 'someOther#mail.com'])
msg.body = """
From: %s <%s>,
%s
""" % (form.name.data, form.email.data, form.message.data)
mail.send(msg)
return "Successfully sent message!"
elif request.method == 'GET':
return render_template('contact.html', form=form)
if __name__ == '__main__':
app.run()
I get the error: Sorry, unexpected error: 'module' object has no attribute 'SMTP_SSL'
I've called my file "main.py". Everything works fine until I try and send the actual email. Is this just because I haven't populated the settings or is something else a miss?
Sorry just figured out how to see traceback on GAE:
Exception on /contact [POST]
Traceback (most recent call last):
File "/base/data/home/apps/s~smart-cove-95709/1.384663697853252774/lib/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/base/data/home/apps/s~smart-cove-95709/1.384663697853252774/lib/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/base/data/home/apps/s~smart-cove-95709/1.384663697853252774/lib/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/base/data/home/apps/s~smart-cove-95709/1.384663697853252774/lib/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/base/data/home/apps/s~smart-cove-95709/1.384663697853252774/lib/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/base/data/home/apps/s~smart-cove-95709/1.384663697853252774/main.py", line 50, in contact
mail.send(msg)
File "/base/data/home/apps/s~smart-cove-95709/1.384663697853252774/lib/flask_mail.py", line 491, in send
with self.connect() as connection:
File "/base/data/home/apps/s~smart-cove-95709/1.384663697853252774/lib/flask_mail.py", line 144, in __enter__
self.host = self.configure_host()
File "/base/data/home/apps/s~smart-cove-95709/1.384663697853252774/lib/flask_mail.py", line 156, in configure_host
host = smtplib.SMTP_SSL(self.mail.server, self.mail.port)
AttributeError: 'module' object has no attribute 'SMTP_SSL'
You have set the MAIL_USE_SSL option to True:
app.config['MAIL_USE_SSL'] = True
which means that the Flask-Mail extension will want to use the smtplib.SMTP_SSL class, but that class isn't usually available on Google App Engine.
That class is only available if the Python ssl module is available, which is only the case if your Python was built with SSL support available. This isn't normally the case in the GAE environment.
The module is not available on Google App Engine unless you specifically enable it. Enable it in your app.yaml:
libraries:
- name: ssl
version: latest
Do note that the socket support on GAE is experimental.
For sending email on GAE you are better off using the mail.send_mail() function however, so you can make use of the GAE infrastructure instead.