google-app-enginegoogle-cloud-platformswaggerpython-3.7flask-restplus
problems running python Flask Restplus API on GCP (app engine)
I'm working on a API Rest app that has to work on GCP. The app runs great locally but when I deploy it to GPC it's not working.
I wrote the webservice in Python 3.7, using Flask, SQLAlchemy, Flask-SQLAlchemy, Flask-Restplus (in order to have Swagger).
I don't have any error while deploying, but when I want to access the documentation (swagger) I have "No Api definition provided" message, and when I try to run a GET method I've got a (CRITICAL) Worker timeout error.
I'll appreciate any help you can give me.
Have a great day!!
Here is some of the code:
project structure:
app.yaml
config.py
main.py
requirements.txt
apis/
__init__.py
log_resource.py
trm_resource.py
...
marshal_models/
__init__.py
log_marshal.py
trm_marshal.py
...
models/
__init__.py
log_model.py
trm_model.py
...
res/
__init__.py
text_messages.py
spa_exceptions.py
main.py
from flask import Flask, send_from_directory
from config import config_by_name
from flask_sqlalchemy import SQLAlchemy
from models import db
from apis import api
app = Flask(__name__)
app.config.from_object(config_by_name['prod'])
api.init_app(app)
db.init_app(app)
if __name__ == '__main__':
app.run(debug=True)
requirements.txt
-i https://pypi.org/simple
aniso8601==8.0.0
attrs==19.3.0
click==7.0
flask-restplus==0.13.0
flask-sqlalchemy==2.4.1
flask-swagger-ui==3.20.9
flask==1.1.1
importlib-metadata==0.23 ; python_version < '3.8'
itsdangerous==1.1.0
jinja2==2.10.3
jsonschema==3.2.0
markupsafe==1.1.1
more-itertools==7.2.0
mysql-connector-python==8.0.18
mysqlclient==1.4.4
protobuf==3.10.0
pyrsistent==0.15.5
pytz==2019.3
simplejson==3.17.0
six==1.13.0
sqlalchemy==1.3.11
werkzeug==0.16.0
zipp==0.6.0
gunicorn==19.9.0
app.yaml
runtime: python
env: flex
entrypoint: gunicorn -b :$PORT main:app
runtime_config:
python_version: 3
config.py
class Config(object):
DEBUG = False
TESTING = False
connection_type = 'gcp' #tcp/ip
DB_SERVER = 'XXX.XXX.XXX.XXX'
DB_USERNAME = 'XXXX'
DB_PASSWORD = 'XXXX'
DB_NAME = 'XXXXX'
SQLALCHEMY_DATABASE_URI = f"mysql+mysqlconnector://{DB_USERNAME}:{DB_PASSWORD}@{DB_SERVER}/{DB_NAME}"
SQLALCHEMY_TRACK_MODIFICATIONS = False
class ProductionConfig(Config):
pass
config_by_name = dict(
dev = DevelopmentConfig,
test = TestingConfig,
prod = ProductionConfig
)
apis\__init__.py
from flask_restplus import Api
from .spa_system_resource import api as spa_name_space
from .stage_resource import api as stage_name_space
from .consolidated_resource import api as consolidated_name_space
from .cost_cat_resource import api as cost_cat_name_space
from .cost_resource import api as cost_name_space
from .log_resource import api as log_name_space
from .trm_resource import api as trm_name_space
from .energy_resource import api as energy_price_name_space
api = Api (
title='API - Spa System',
version='1.0',
description='XXXXXX',
contact='XXXXX',
contact_email='XXXXXXXXXXX',
contact_url='XXXXXXXX',
default_mediatype='application/json',
)
api.add_namespace(spa_name_space)
api.add_namespace(stage_name_space)
api.add_namespace(consolidated_name_space)
api.add_namespace(cost_name_space)
api.add_namespace(cost_cat_name_space)
api.add_namespace(log_name_space)
api.add_namespace(trm_name_space)
api.add_namespace(energy_price_name_space)
extract of one resource file: apis\log_resource.py
import datetime
from flask import current_app as app
from flask import Flask, request, jsonify, make_response
from flask_sqlalchemy import sqlalchemy
from flask_restplus import Namespace, Resource, reqparse, abort, fields
from werkzeug.exceptions import HTTPException
from res import DatabaseIntegrityError, DatabaseError, EngMsg as msg
from sqlalchemy.exc import SQLAlchemyError, IntegrityError
from models import Log, ModelList
from marshal_models import log_model_dict
api = Namespace('logs', description=msg.API_NAMESPACE_LOG_DESCRIPTION)
log_model = api.model('log', log_model_dict)
@api.route('/<log_id>')
@api.doc(responses={ 200: msg.API_DOC_RESPONSES_200,
400: msg.API_DOC_RESPONSES_400,
409: msg.API_DOC_RESPONSES_409,
500: msg.API_DOC_RESPONSES_500 })
class LogRes(Resource):
@api.doc(params={"log_id": msg.API_DOC_PARAMS_LOG_ID})
@api.marshal_with(log_model, skip_none=True)
def get(self, log_id):
try:
if log_id.isdigit():
return Log.query.get(log_id)
else:
app.logger.error(TypeError(msg.ERROR_TYPE_ERROR))
return msg.API_DOC_RESPONSES_400, 400
except DatabaseIntegrityError as err:
app.logger.error(err)
return msg.API_DOC_RESPONSES_409, 409
except HTTPException as err:
app.logger.error(f'HTTException: {err}')
return msg.API_DOC_RESPONSES_400, 400
except (Exception, DatabaseError) as err:
app.logger.error(err)
return msg.API_DOC_RESPONSES_500, 500
@api.doc(params={"log_id": msg.API_DOC_PARAMS_LOG_ID})
@api.expect(log_model, validate=True)
@api.marshal_with(log_model, skip_none=True)
def put(self, log_id):
try:
if log_id.isdigit():
log = Log.query.get(log_id)
if log:
log.update(api.payload)
return log
else:
app.logger.error(TypeError(msg.ERROR_TYPE_ERROR))
return msg.API_DOC_RESPONSES_400, 400
except DatabaseIntegrityError as err:
app.logger.error(err)
return msg.API_DOC_RESPONSES_409, 409
except HTTPException as err:
app.logger.error(f'HTTException: {err}')
return msg.API_DOC_RESPONSES_400, 400
except (Exception, DatabaseError) as err:
app.logger.error(err)
return msg.API_DOC_RESPONSES_500, 500
@api.doc(params={"log_id": msg.API_DOC_PARAMS_LOG_ID})
@api.response(204, msg.API_DOC_RESPONSES_204)
def delete(self, log_id):
try:
if log_id.isdigit():
log = Log.query.get(log_id)
if log:
log.delete()
return msg.API_DOC_RESPONSES_204, 204
else:
app.logger.error(TypeError(msg.ERROR_TYPE_ERROR))
return msg.API_DOC_RESPONSES_400, 400
except DatabaseIntegrityError as err:
app.logger.error(err)
return msg.API_DOC_RESPONSES_409, 409
except HTTPException as err:
app.logger.error(f'HTTException: {err}')
return msg.API_DOC_RESPONSES_400, 400
except (Exception, DatabaseError) as err:
app.logger.error(err)
return msg.API_DOC_RESPONSES_500, 500
error message in browser trying to call a GET method (updated nov 27 2019):
error log in gcp (updated nov 27 2019)
[
{
"protoPayload": {
"@type": "type.googleapis.com/google.appengine.logging.v1.RequestLog",
"appId": "p~maximal-beach-255318",
"versionId": "20191126t083944",
"requestId": "5dde722800ff01c4db2055869d0001707e6d6178696d616c2d62656163682d3235353331380001323031393131323674303833393434000100",
"ip": "217.182.175.162",
"startTime": "2019-11-27T12:55:04.115931Z",
"endTime": "2019-11-27T12:55:35.620208Z",
"latency": "31.504277s",
"megaCycles": "672",
"method": "HEAD",
"resource": "/stages/",
"httpVersion": "HTTP/1.1",
"status": 502,
"responseSize": "122",
"userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36",
"urlMapEntry": "auto",
"host": "maximal-beach-255318.appspot.com",
"cost": 1.3634e-8,
"instanceIndex": -1,
"finished": true,
"instanceId": "00c61b117cdf0dc021505dc1db4b8707a84de0d2f54c6da3e7f40f65466f31153b28ae49",
"appEngineRelease": "1.9.71",
"traceId": "66545566d74d32b65a44ef6b5e8eb3e1",
"first": true,
"traceSampled": true
},
"insertId": "5dde72470009773abcebccc9",
"httpRequest": {
"status": 502
},
"resource": {
"type": "gae_app",
"labels": {
"module_id": "default",
"zone": "us-east1-3",
"project_id": "maximal-beach-255318",
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}
},
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"labels": {
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},
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"operation": {
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"producer": "appengine.googleapis.com/request_id",
"first": true,
"last": true
},
"trace": "projects/maximal-beach-255318/traces/66545566d74d32b65a44ef6b5e8eb3e1",
"receiveTimestamp": "2019-11-27T12:55:35.626061163Z",
"traceSampled": true
},
{
"textPayload": "[2019-11-27 12:45:27 +0000] [20] [INFO] Booting worker with pid: 20",
"insertId": "5dde6fe70007e247c06a652a",
"resource": {
"type": "gae_app",
"labels": {
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}
},
"timestamp": "2019-11-27T12:45:27.516679Z",
"labels": {
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},
"logName": "projects/maximal-beach-255318/logs/stderr",
"receiveTimestamp": "2019-11-27T12:45:27.671289763Z"
},
{
"textPayload": "[2019-11-27 12:45:26 +0000] [7] [CRITICAL] WORKER TIMEOUT (pid:19)",
"insertId": "5dde6fe6000528928a3fd08e",
"resource": {
"type": "gae_app",
"labels": {
"version_id": "20191126t083944",
"module_id": "default",
"zone": "us-east1-3",
"project_id": "maximal-beach-255318"
}
},
"timestamp": "2019-11-27T12:45:26.338066Z",
"labels": {
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},
"logName": "projects/maximal-beach-255318/logs/stderr",
"receiveTimestamp": "2019-11-27T12:45:26.344938571Z"
},
{
"protoPayload": {
"@type": "type.googleapis.com/google.appengine.logging.v1.RequestLog",
"appId": "p~maximal-beach-255318",
"versionId": "20191126t083944",
"requestId": "5dde6fc700ff0b4dadaec6e11e0001707e6d6178696d616c2d62656163682d3235353331380001323031393131323674303833393434000100",
"ip": "190.217.67.6",
"startTime": "2019-11-27T12:44:55.740781Z",
"endTime": "2019-11-27T12:45:27.355877Z",
"latency": "31.615096s",
"megaCycles": "662",
"method": "GET",
"resource": "/logs/",
"httpVersion": "HTTP/1.1",
"status": 502,
"responseSize": "690",
"userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36",
"urlMapEntry": "auto",
"host": "maximal-beach-255318.appspot.com",
"cost": 7.7113e-8,
"instanceIndex": -1,
"finished": true,
"instanceId": "00c61b117cdf0dc021505dc1db4b8707a84de0d2f54c6da3e7f40f65466f31153b28ae49",
"appEngineRelease": "1.9.71",
"traceId": "17ca3e3af386e29af2197260dd20ca5b",
"first": true,
"traceSampled": true
},
"insertId": "5dde6fe700056f2d0a6185c7",
"httpRequest": {
"status": 502
},
"resource": {
"type": "gae_app",
"labels": {
"version_id": "20191126t083944",
"module_id": "default",
"zone": "us-east1-3",
"project_id": "maximal-beach-255318"
}
},
"timestamp": "2019-11-27T12:44:55.740781Z",
"labels": {
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},
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"operation": {
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"producer": "appengine.googleapis.com/request_id",
"first": true,
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},
"trace": "projects/maximal-beach-255318/traces/17ca3e3af386e29af2197260dd20ca5b",
"receiveTimestamp": "2019-11-27T12:45:27.357040172Z",
"traceSampled": true
},
{
"textPayload": "[2019-11-27 12:44:50 +0000] [19] [INFO] Booting worker with pid: 19",
"insertId": "5dde6fc200029a6115a11cd3",
"resource": {
"type": "gae_app",
"labels": {
"project_id": "maximal-beach-255318",
"version_id": "20191126t083944",
"module_id": "default",
"zone": "us-east1-3"
}
},
"timestamp": "2019-11-27T12:44:50.170593Z",
"labels": {
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},
"logName": "projects/maximal-beach-255318/logs/stderr",
"receiveTimestamp": "2019-11-27T12:44:50.177293952Z"
},
{
"textPayload": "[2019-11-27 12:44:48 +0000] [7] [CRITICAL] WORKER TIMEOUT (pid:18)",
"insertId": "5dde6fc0000ccba4ab7daec2",
"resource": {
"type": "gae_app",
"labels": {
"zone": "us-east1-3",
"project_id": "maximal-beach-255318",
"version_id": "20191126t083944",
"module_id": "default"
}
},
"timestamp": "2019-11-27T12:44:48.838564Z",
"labels": {
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},
"logName": "projects/maximal-beach-255318/logs/stderr",
"receiveTimestamp": "2019-11-27T12:44:48.846320557Z"
},
{
"protoPayload": {
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"ip": "190.217.67.6",
"startTime": "2019-11-27T12:44:18.046838Z",
"endTime": "2019-11-27T12:44:49.927998Z",
"latency": "31.881160s",
"megaCycles": "638",
"method": "GET",
"resource": "/stages/",
"httpVersion": "HTTP/1.1",
"status": 502,
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"userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36",
"urlMapEntry": "auto",
"host": "maximal-beach-255318.appspot.com",
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},
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},
"resource": {
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}
},
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"labels": {
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},
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"operation": {
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"producer": "appengine.googleapis.com/request_id",
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},
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"receiveTimestamp": "2019-11-27T12:44:49.941671848Z",
"traceSampled": true
},
{
"protoPayload": {
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"ip": "190.217.67.6",
"startTime": "2019-11-27T12:44:00.648486Z",
"endTime": "2019-11-27T12:44:05.324856Z",
"latency": "4.676370s",
"megaCycles": "2744",
"method": "GET",
"resource": "/favicon.ico",
"httpVersion": "HTTP/1.1",
"status": 404,
"responseSize": "385",
"referrer": "http://maximal-beach-255318.appspot.com/stages/",
"userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36",
"urlMapEntry": "auto",
"host": "maximal-beach-255318.appspot.com",
"cost": 4.3027e-8,
"instanceIndex": -1,
"finished": true,
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"appEngineRelease": "1.9.71",
"traceId": "18628020e642702bce4c2e0b3187e2ce",
"first": true,
"traceSampled": true
},
"insertId": "5dde6f9500069b4e77b19ab5",
"httpRequest": {
"status": 404
},
"resource": {
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"labels": {
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"project_id": "maximal-beach-255318",
"version_id": "20191126t083944",
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}
},
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},
"trace": "projects/maximal-beach-255318/traces/18628020e642702bce4c2e0b3187e2ce",
"receiveTimestamp": "2019-11-27T12:44:05.434941402Z",
"traceSampled": true
},
{
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"insertId": "5dde6f900009af56ce378348",
"resource": {
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},
"timestamp": "2019-11-27T12:44:00.634710Z",
"labels": {
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},
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"receiveTimestamp": "2019-11-27T12:44:00.697087376Z"
},
{
"textPayload": "[2019-11-27 12:43:59 +0000] [7] [CRITICAL] WORKER TIMEOUT (pid:15)",
"insertId": "5dde6f8f00057bd7123ebed3",
"resource": {
"type": "gae_app",
"labels": {
"zone": "us-east1-3",
"project_id": "maximal-beach-255318",
"version_id": "20191126t083944",
"module_id": "default"
}
},
"timestamp": "2019-11-27T12:43:59.359383Z",
"labels": {
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},
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"receiveTimestamp": "2019-11-27T12:43:59.367903796Z"
},
{
"protoPayload": {
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"appId": "p~maximal-beach-255318",
"versionId": "20191126t083944",
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"ip": "190.217.67.6",
"startTime": "2019-11-27T12:43:29.241991Z",
"endTime": "2019-11-27T12:44:00.433791Z",
"latency": "31.191800s",
"megaCycles": "670",
"method": "GET",
"resource": "/stages/",
"httpVersion": "HTTP/1.1",
"status": 502,
"responseSize": "690",
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Solution
Thanks to the error message that you have provide, things now are more clear. So this message
Mixed Content: The page at '*****' was loaded over HTTPS, but requested an insecure resource 'http://****/swagger.json'. This content should also be served over HTTPS.
Means that your App Engine is trying to serve content over HTTPS. However, your Flask Restplus is sending HTTP requests. Here it’s trying to get “http://****/swagger.json”
with a HTTP request. Due to this mismatch the call was blocked and you received “No API definition provided”.
To solve this issue, I noticed you are using “werkzeug” middleware.
Add this code to your Flask initialization:
from werkzeug.middleware.proxy_fix import ProxyFix
app = Flask(__name__)
app.wsgi_app = ProxyFix(app.wsgi_app)
You can read about the original issue here.
I hope this helps.
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