def tearDown(self):
super().tearDown()
with self.disable_logging():
FlaskInstrumentor().uninstrument()
def createTables(cursor):
for table_name in TABLES:
table_description = TABLES[table_name]
try:
print("Creating table {}: ".format(table_name), end='')
cursor.execute(table_description)
except mysql.connector.Error as err:
if err.errno == errorcode.ER_TABLE_EXISTS_ERROR:
print("already exists.")
else:
print(err.msg)
else:
print("OK")
MySQLInstrumentor().instrument()
FlaskInstrumentor().instrument_app(app)
RequestsInstrumentor().instrument(tracer_provider=tracerProvider)
@app.route("/database")
def database():
with tracer.start_as_current_span("database"):
return "database"
UPDATE_INVENTORY_ITEM_CMD = ("INSERT INTO Inventory_Items (ItemId, TotalQty) VALUES "
"(%(ItemId)s, %(Qty)s) ON DUPLICATE KEY UPDATE TotalQty = TotalQty + %(Qty)s")
@app.route("/update_item", methods=["POST", "PUT"])
def updateItem():
with tracer.start_as_current_span("update_item"):
data = request.form.to_dict()
def tearDown(self):
super().tearDown()
self.env_patch.stop()
self.exclude_patch.stop()
with self.disable_logging():
FlaskInstrumentor().uninstrument_app(self.app)
def setup_tracing():
start_tracing()
FlaskInstrumentor().instrument_app(app)
# It must be done before instrumenting any library.
trace.set_tracer_provider(TracerProvider())
# configure exporter to Jaeger
jaeger_exporter = jaeger.JaegerSpanExporter(
service_name="my-server",
agent_host_name="localhost",
agent_port=6831,
)
trace.get_tracer_provider().add_span_processor(
BatchExportSpanProcessor(jaeger_exporter)
)
# Enable instrumentation for Flask and MySQL libraries
FlaskInstrumentor().instrument()
MySQLInstrumentor().instrument()
tracer = trace.get_tracer(__name__)
############################# application code #################################
app = flask.Flask(__name__)
mydb = mysql.connector.connect(
user=MYSQL_USER,
password=MYSQL_PASSWORD,
host=MYSQL_HOST,
port=MYSQL_PORT,
database=MYSQL_DB_NAME,
)
def tearDown(self) -> None:
super().tearDown()
with self.disable_logging():
FlaskInstrumentor().uninstrument_app(self.app)
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import flask
from flask import request
from opentelemetry import trace
from opentelemetry.instrumentation.flask import FlaskInstrumentor
application = flask.Flask(__name__)
FlaskInstrumentor().instrument_app(application)
def fib_slow(n):
if n <= 1:
return n
return fib_slow(n - 1) + fib_fast(n - 2)
def fib_fast(n):
nth_fib = [0] * (n + 2)
nth_fib[1] = 1
for i in range(2, n + 1):
nth_fib[i] = nth_fib[i - 1] + nth_fib[i - 2]
return nth_fib[n]
def create_app():
"""Flask application factory to create instances
of the Frontend Flask App
"""
app = Flask(__name__)
# Disabling unused-variable for lines with route decorated functions
# as pylint thinks they are unused
# pylint: disable=unused-variable
@app.route('/version', methods=['GET'])
def version():
"""
Service version endpoint
"""
return os.environ.get('VERSION'), 200
@app.route('/ready', methods=['GET'])
def readiness():
"""
Readiness probe
"""
return 'ok', 200
@app.route('/whereami', methods=['GET'])
def whereami():
"""
Returns the cluster name + zone name where this Pod is running.
"""
return "Cluster: " + cluster_name + ", Pod: " + pod_name + ", Zone: " + pod_zone, 200
@app.route("/")
def root():
"""
Renders home page or login page, depending on authentication status.
"""
token = request.cookies.get(app.config['TOKEN_NAME'])
if not verify_token(token):
return login_page()
return home()
@app.route("/home")
def home():
"""
Renders home page. Redirects to /login if token is not valid
"""
token = request.cookies.get(app.config['TOKEN_NAME'])
if not verify_token(token):
# user isn't authenticated
app.logger.debug(
'User isn\'t authenticated. Redirecting to login page.')
return redirect(
url_for('login_page',
_external=True,
_scheme=app.config['SCHEME']))
token_data = jwt.decode(token, verify=False)
display_name = token_data['name']
username = token_data['user']
account_id = token_data['acct']
hed = {'Authorization': 'Bearer ' + token}
# get balance
balance = None
try:
url = '{}/{}'.format(app.config["BALANCES_URI"], account_id)
app.logger.debug('Getting account balance.')
response = requests.get(url=url,
headers=hed,
timeout=app.config['BACKEND_TIMEOUT'])
if response:
balance = response.json()
except (requests.exceptions.RequestException, ValueError) as err:
app.logger.error('Error getting account balance: %s', str(err))
# get history
transaction_list = None
try:
url = '{}/{}'.format(app.config["HISTORY_URI"], account_id)
app.logger.debug('Getting transaction history.')
response = requests.get(url=url,
headers=hed,
timeout=app.config['BACKEND_TIMEOUT'])
if response:
transaction_list = response.json()
except (requests.exceptions.RequestException, ValueError) as err:
app.logger.error('Error getting transaction history: %s', str(err))
# get contacts
contacts = []
try:
url = '{}/{}'.format(app.config["CONTACTS_URI"], username)
app.logger.debug('Getting contacts.')
response = requests.get(url=url,
headers=hed,
timeout=app.config['BACKEND_TIMEOUT'])
if response:
contacts = response.json()
except (requests.exceptions.RequestException, ValueError) as err:
app.logger.error('Error getting contacts: %s', str(err))
_populate_contact_labels(account_id, transaction_list, contacts)
return render_template('index.html',
cluster_name=cluster_name,
pod_name=pod_name,
pod_zone=pod_zone,
cymbal_logo=os.getenv('CYMBAL_LOGO', 'false'),
history=transaction_list,
balance=balance,
name=display_name,
account_id=account_id,
contacts=contacts,
message=request.args.get('msg', None),
bank_name=os.getenv('BANK_NAME',
'Bank of Anthos'))
def _populate_contact_labels(account_id, transactions, contacts):
"""
Populate contact labels for the passed transactions.
Side effect:
Take each transaction and set the 'accountLabel' field with the label of
the contact each transaction was associated with. If there was no
associated contact, set 'accountLabel' to None.
If any parameter is None, nothing happens.
Params: account_id - the account id for the user owning the transaction list
transactions - a list of transactions as key/value dicts
[{transaction1}, {transaction2}, ...]
contacts - a list of contacts as key/value dicts
[{contact1}, {contact2}, ...]
"""
app.logger.debug('Populating contact labels.')
if account_id is None or transactions is None or contacts is None:
return
# Map contact accounts to their labels. If no label found, default to None.
contact_map = {c['account_num']: c.get('label') for c in contacts}
# Populate the 'accountLabel' field. If no match found, default to None.
for trans in transactions:
if trans['toAccountNum'] == account_id:
trans['accountLabel'] = contact_map.get(
trans['fromAccountNum'])
elif trans['fromAccountNum'] == account_id:
trans['accountLabel'] = contact_map.get(trans['toAccountNum'])
@app.route('/payment', methods=['POST'])
def payment():
"""
Submits payment request to ledgerwriter service
Fails if:
- token is not valid
- basic validation checks fail
- response code from ledgerwriter is not 201
"""
token = request.cookies.get(app.config['TOKEN_NAME'])
if not verify_token(token):
# user isn't authenticated
app.logger.error(
'Error submitting payment: user is not authenticated.')
return abort(401)
try:
account_id = jwt.decode(token, verify=False)['acct']
recipient = request.form['account_num']
if recipient == 'add':
recipient = request.form['contact_account_num']
label = request.form.get('contact_label', None)
if label:
# new contact. Add to contacts list
_add_contact(label, recipient, app.config['LOCAL_ROUTING'],
False)
transaction_data = {
"fromAccountNum": account_id,
"fromRoutingNum": app.config['LOCAL_ROUTING'],
"toAccountNum": recipient,
"toRoutingNum": app.config['LOCAL_ROUTING'],
"amount": int(Decimal(request.form['amount']) * 100),
"uuid": request.form['uuid']
}
_submit_transaction(transaction_data)
app.logger.info('Payment initiated successfully.')
return redirect(
url_for('home',
msg='Payment successful',
_external=True,
_scheme=app.config['SCHEME']))
except requests.exceptions.RequestException as err:
app.logger.error('Error submitting payment: %s', str(err))
except UserWarning as warn:
app.logger.error('Error submitting payment: %s', str(warn))
msg = 'Payment failed: {}'.format(str(warn))
return redirect(
url_for('home',
msg=msg,
_external=True,
_scheme=app.config['SCHEME']))
return redirect(
url_for('home',
msg='Payment failed',
_external=True,
_scheme=app.config['SCHEME']))
@app.route('/deposit', methods=['POST'])
def deposit():
"""
Submits deposit request to ledgerwriter service
Fails if:
- token is not valid
- routing number == local routing number
- response code from ledgerwriter is not 201
"""
token = request.cookies.get(app.config['TOKEN_NAME'])
if not verify_token(token):
# user isn't authenticated
app.logger.error(
'Error submitting deposit: user is not authenticated.')
return abort(401)
try:
# get account id from token
account_id = jwt.decode(token, verify=False)['acct']
if request.form['account'] == 'add':
external_account_num = request.form['external_account_num']
external_routing_num = request.form['external_routing_num']
if external_routing_num == app.config['LOCAL_ROUTING']:
raise UserWarning("invalid routing number")
external_label = request.form.get('external_label', None)
if external_label:
# new contact. Add to contacts list
_add_contact(external_label, external_account_num,
external_routing_num, True)
else:
account_details = json.loads(request.form['account'])
external_account_num = account_details['account_num']
external_routing_num = account_details['routing_num']
transaction_data = {
"fromAccountNum": external_account_num,
"fromRoutingNum": external_routing_num,
"toAccountNum": account_id,
"toRoutingNum": app.config['LOCAL_ROUTING'],
"amount": int(Decimal(request.form['amount']) * 100),
"uuid": request.form['uuid']
}
_submit_transaction(transaction_data)
app.logger.info('Deposit submitted successfully.')
return redirect(
url_for('home',
msg='Deposit successful',
_external=True,
_scheme=app.config['SCHEME']))
except requests.exceptions.RequestException as err:
app.logger.error('Error submitting deposit: %s', str(err))
except UserWarning as warn:
app.logger.error('Error submitting deposit: %s', str(warn))
msg = 'Deposit failed: {}'.format(str(warn))
return redirect(
url_for('home',
msg=msg,
_external=True,
_scheme=app.config['SCHEME']))
return redirect(
url_for('home',
msg='Deposit failed',
_external=True,
_scheme=app.config['SCHEME']))
def _submit_transaction(transaction_data):
app.logger.debug('Submitting transaction.')
token = request.cookies.get(app.config['TOKEN_NAME'])
hed = {
'Authorization': 'Bearer ' + token,
'content-type': 'application/json'
}
resp = requests.post(url=app.config["TRANSACTIONS_URI"],
data=jsonify(transaction_data).data,
headers=hed,
timeout=app.config['BACKEND_TIMEOUT'])
try:
resp.raise_for_status() # Raise on HTTP Status code 4XX or 5XX
except requests.exceptions.HTTPError as http_request_err:
raise UserWarning(resp.text) from http_request_err
def _add_contact(label, acct_num, routing_num, is_external_acct=False):
"""
Submits a new contact to the contact service.
Raise: UserWarning if the response status is 4xx or 5xx.
"""
app.logger.debug('Adding new contact.')
token = request.cookies.get(app.config['TOKEN_NAME'])
hed = {
'Authorization': 'Bearer ' + token,
'content-type': 'application/json'
}
contact_data = {
'label': label,
'account_num': acct_num,
'routing_num': routing_num,
'is_external': is_external_acct
}
token_data = jwt.decode(token, verify=False)
url = '{}/{}'.format(app.config["CONTACTS_URI"], token_data['user'])
resp = requests.post(url=url,
data=jsonify(contact_data).data,
headers=hed,
timeout=app.config['BACKEND_TIMEOUT'])
try:
resp.raise_for_status() # Raise on HTTP Status code 4XX or 5XX
except requests.exceptions.HTTPError as http_request_err:
raise UserWarning(resp.text) from http_request_err
@app.route("/login", methods=['GET'])
def login_page():
"""
Renders login page. Redirects to /home if user already has a valid token
"""
token = request.cookies.get(app.config['TOKEN_NAME'])
if verify_token(token):
# already authenticated
app.logger.debug(
'User already authenticated. Redirecting to /home')
return redirect(
url_for('home', _external=True, _scheme=app.config['SCHEME']))
return render_template('login.html',
cymbal_logo=os.getenv('CYMBAL_LOGO', 'false'),
cluster_name=cluster_name,
pod_name=pod_name,
pod_zone=pod_zone,
message=request.args.get('msg', None),
default_user=os.getenv('DEFAULT_USERNAME', ''),
default_password=os.getenv(
'DEFAULT_PASSWORD', ''),
bank_name=os.getenv('BANK_NAME',
'Bank of Anthos'))
@app.route('/login', methods=['POST'])
def login():
"""
Submits login request to userservice and saves resulting token
Fails if userservice does not accept input username and password
"""
return _login_helper(request.form['username'],
request.form['password'])
def _login_helper(username, password):
try:
app.logger.debug('Logging in.')
req = requests.get(url=app.config["LOGIN_URI"],
params={
'username': username,
'password': password
})
req.raise_for_status() # Raise on HTTP Status code 4XX or 5XX
# login success
token = req.json()['token'].encode('utf-8')
claims = jwt.decode(token, verify=False)
max_age = claims['exp'] - claims['iat']
resp = make_response(
redirect(
url_for('home',
_external=True,
_scheme=app.config['SCHEME'])))
resp.set_cookie(app.config['TOKEN_NAME'], token, max_age=max_age)
app.logger.info('Successfully logged in.')
return resp
except (RequestException, HTTPError) as err:
app.logger.error('Error logging in: %s', str(err))
return redirect(
url_for('login',
msg='Login Failed',
_external=True,
_scheme=app.config['SCHEME']))
@app.route("/signup", methods=['GET'])
def signup_page():
"""
Renders signup page. Redirects to /login if token is not valid
"""
token = request.cookies.get(app.config['TOKEN_NAME'])
if verify_token(token):
# already authenticated
app.logger.debug(
'User already authenticated. Redirecting to /home')
return redirect(
url_for('home', _external=True, _scheme=app.config['SCHEME']))
return render_template('signup.html',
cymbal_logo=os.getenv('CYMBAL_LOGO', 'false'),
cluster_name=cluster_name,
pod_name=pod_name,
pod_zone=pod_zone,
bank_name=os.getenv('BANK_NAME',
'Bank of Anthos'))
@app.route("/signup", methods=['POST'])
def signup():
"""
Submits signup request to userservice
Fails if userservice does not accept input form data
"""
try:
# create user
app.logger.debug('Creating new user.')
resp = requests.post(url=app.config["USERSERVICE_URI"],
data=request.form,
timeout=app.config['BACKEND_TIMEOUT'])
if resp.status_code == 201:
# user created. Attempt login
app.logger.info('New user created.')
return _login_helper(request.form['username'],
request.form['password'])
except requests.exceptions.RequestException as err:
app.logger.error('Error creating new user: %s', str(err))
return redirect(
url_for('login',
msg='Error: Account creation failed',
_external=True,
_scheme=app.config['SCHEME']))
@app.route('/logout', methods=['POST'])
def logout():
"""
Logs out user by deleting token cookie and redirecting to login page
"""
app.logger.info('Logging out.')
resp = make_response(
redirect(
url_for('login_page',
_external=True,
_scheme=app.config['SCHEME'])))
resp.delete_cookie(app.config['TOKEN_NAME'])
return resp
def verify_token(token):
"""
Validates token using userservice public key
"""
app.logger.debug('Verifying token.')
if token is None:
return False
try:
jwt.decode(token,
key=app.config['PUBLIC_KEY'],
algorithms='RS256',
verify=True)
app.logger.debug('Token verified.')
return True
except jwt.exceptions.InvalidTokenError as err:
app.logger.error('Error validating token: %s', str(err))
return False
# register html template formatters
def format_timestamp_day(timestamp):
""" Format the input timestamp day in a human readable way """
# TODO: time zones?
date = datetime.datetime.strptime(timestamp,
app.config['TIMESTAMP_FORMAT'])
return date.strftime('%d')
def format_timestamp_month(timestamp):
""" Format the input timestamp month in a human readable way """
# TODO: time zones?
date = datetime.datetime.strptime(timestamp,
app.config['TIMESTAMP_FORMAT'])
return date.strftime('%b')
def format_currency(int_amount):
""" Format the input currency in a human readable way """
if int_amount is None:
return '$---'
amount_str = '${:0,.2f}'.format(abs(Decimal(int_amount) / 100))
if int_amount < 0:
amount_str = '-' + amount_str
return amount_str
# set up global variables
app.config["TRANSACTIONS_URI"] = 'http://{}/transactions'.format(
os.environ.get('TRANSACTIONS_API_ADDR'))
app.config["USERSERVICE_URI"] = 'http://{}/users'.format(
os.environ.get('USERSERVICE_API_ADDR'))
app.config["BALANCES_URI"] = 'http://{}/balances'.format(
os.environ.get('BALANCES_API_ADDR'))
app.config["HISTORY_URI"] = 'http://{}/transactions'.format(
os.environ.get('HISTORY_API_ADDR'))
app.config["LOGIN_URI"] = 'http://{}/login'.format(
os.environ.get('USERSERVICE_API_ADDR'))
app.config["CONTACTS_URI"] = 'http://{}/contacts'.format(
os.environ.get('CONTACTS_API_ADDR'))
app.config['PUBLIC_KEY'] = open(os.environ.get('PUB_KEY_PATH'), 'r').read()
app.config['LOCAL_ROUTING'] = os.getenv('LOCAL_ROUTING_NUM')
app.config[
'BACKEND_TIMEOUT'] = 4 # timeout in seconds for calls to the backend
app.config['TOKEN_NAME'] = 'token'
app.config['TIMESTAMP_FORMAT'] = '%Y-%m-%dT%H:%M:%S.%f%z'
app.config['SCHEME'] = os.environ.get('SCHEME', 'http')
# where am I?
metadata_url = 'http://metadata.google.internal/computeMetadata/v1/'
metadata_headers = {'Metadata-Flavor': 'Google'}
# get GKE cluster name
cluster_name = "unknown"
try:
req = requests.get(metadata_url + 'instance/attributes/cluster-name',
headers=metadata_headers)
if req.ok:
cluster_name = str(req.text)
except (RequestException, HTTPError) as err:
app.logger.warning("Unable to capture GKE cluster name.")
# get GKE pod name
pod_name = "unknown"
pod_name = socket.gethostname()
# get GKE node zone
pod_zone = "unknown"
try:
req = requests.get(metadata_url + 'instance/zone',
headers=metadata_headers)
if req.ok:
pod_zone = str(req.text.split("/")[3])
except (RequestException, HTTPError) as err:
app.logger.warning("Unable to capture GKE node zone.")
# register formater functions
app.jinja_env.globals.update(format_currency=format_currency)
app.jinja_env.globals.update(format_timestamp_month=format_timestamp_month)
app.jinja_env.globals.update(format_timestamp_day=format_timestamp_day)
# Set up logging
app.logger.handlers = logging.getLogger('gunicorn.error').handlers
app.logger.setLevel(logging.getLogger('gunicorn.error').level)
app.logger.info('Starting frontend service.')
# Set up tracing and export spans to Cloud Trace.
if os.environ['ENABLE_TRACING'] == "true":
app.logger.info("✅ Tracing enabled.")
trace.set_tracer_provider(TracerProvider())
cloud_trace_exporter = CloudTraceSpanExporter()
trace.get_tracer_provider().add_span_processor(
BatchExportSpanProcessor(cloud_trace_exporter))
set_global_textmap(CloudTraceFormatPropagator())
# Add tracing auto-instrumentation for Flask, jinja and requests
FlaskInstrumentor().instrument_app(app)
RequestsInstrumentor().instrument()
Jinja2Instrumentor().instrument()
else:
app.logger.info("🚫 Tracing disabled.")
return app
def create_app():
"""Flask application factory to create instances
of the Contact Service Flask App
"""
app = Flask(__name__)
# Disabling unused-variable for lines with route decorated functions
# as pylint thinks they are unused
# pylint: disable=unused-variable
@app.route("/version", methods=["GET"])
def version():
"""
Service version endpoint
"""
return app.config["VERSION"], 200
@app.route("/ready", methods=["GET"])
def ready():
"""Readiness probe."""
return "ok", 200
@app.route("/contacts/<username>", methods=["GET"])
def get_contacts(username):
"""Retrieve the contacts list for the authenticated user.
This list is used for populating Payment and Deposit fields.
Return: a list of contacts
"""
auth_header = request.headers.get("Authorization")
if auth_header:
token = auth_header.split(" ")[-1]
else:
token = ""
try:
auth_payload = jwt.decode(token,
key=app.config["PUBLIC_KEY"],
algorithms="RS256")
if username != auth_payload["user"]:
raise PermissionError
contacts_list = contacts_db.get_contacts(username)
app.logger.debug("Succesfully retrieved contacts.")
return jsonify(contacts_list), 200
except (PermissionError, jwt.exceptions.InvalidTokenError) as err:
app.logger.error("Error retrieving contacts list: %s", str(err))
return "authentication denied", 401
except SQLAlchemyError as err:
app.logger.error("Error retrieving contacts list: %s", str(err))
return "failed to retrieve contacts list", 500
@app.route("/contacts/<username>", methods=["POST"])
def add_contact(username):
"""Add a new favorite account to user's contacts list
Fails if account or routing number are invalid
or if label is not alphanumeric
request fields:
- account_num
- routing_num
- label
- is_external
"""
auth_header = request.headers.get("Authorization")
if auth_header:
token = auth_header.split(" ")[-1]
else:
token = ""
try:
auth_payload = jwt.decode(token,
key=app.config["PUBLIC_KEY"],
algorithms="RS256")
if username != auth_payload["user"]:
raise PermissionError
req = {
k: (bleach.clean(v) if isinstance(v, str) else v)
for k, v in request.get_json().items()
}
_validate_new_contact(req)
_check_contact_allowed(username, auth_payload["acct"], req)
# Create contact data to be added to the database.
contact_data = {
"username": username,
"label": req["label"],
"account_num": req["account_num"],
"routing_num": req["routing_num"],
"is_external": req["is_external"],
}
# Add contact_data to database
app.logger.debug("Adding new contact to the database.")
contacts_db.add_contact(contact_data)
app.logger.info("Successfully added new contact.")
return jsonify({}), 201
except (PermissionError, jwt.exceptions.InvalidTokenError) as err:
app.logger.error("Error adding contact: %s", str(err))
return "authentication denied", 401
except UserWarning as warn:
app.logger.error("Error adding contact: %s", str(warn))
return str(warn), 400
except ValueError as err:
app.logger.error("Error adding contact: %s", str(err))
return str(err), 409
except SQLAlchemyError as err:
app.logger.error("Error adding contact: %s", str(err))
return "failed to add contact", 500
def _validate_new_contact(req):
"""Check that this new contact request has valid fields"""
app.logger.debug("validating add contact request: %s", str(req))
# Check if required fields are filled
fields = ("label", "account_num", "routing_num", "is_external")
if any(f not in req for f in fields):
raise UserWarning("missing required field(s)")
# Validate account number (must be 10 digits)
if req["account_num"] is None or not re.match(r"\A[0-9]{10}\Z",
req["account_num"]):
raise UserWarning("invalid account number")
# Validate routing number (must be 9 digits)
if req["routing_num"] is None or not re.match(r"\A[0-9]{9}\Z",
req["routing_num"]):
raise UserWarning("invalid routing number")
# Only allow external accounts to deposit
if (req["is_external"]
and req["routing_num"] == app.config["LOCAL_ROUTING"]):
raise UserWarning("invalid routing number")
# Validate label
# Must be >0 and <=30 chars, alphanumeric and spaces, can't start with space
if req["label"] is None or not re.match(
r"^[0-9a-zA-Z][0-9a-zA-Z ]{0,29}$", req["label"]):
raise UserWarning("invalid account label")
def _check_contact_allowed(username, accountid, req):
"""Check that this contact is allowed to be created"""
app.logger.debug(
"checking that this contact is allowed to be created: %s",
str(req))
# Don't allow self reference
if (req["account_num"] == accountid
and req["routing_num"] == app.config["LOCAL_ROUTING"]):
raise ValueError("may not add yourself to contacts")
# Don't allow identical contacts
for contact in contacts_db.get_contacts(username):
if (contact["account_num"] == req["account_num"]
and contact["routing_num"] == req["routing_num"]):
raise ValueError("account already exists as a contact")
if contact["label"] == req["label"]:
raise ValueError("contact already exists with that label")
@atexit.register
def _shutdown():
"""Executed when web app is terminated."""
app.logger.info("Stopping contacts service.")
# set up logger
app.logger.handlers = logging.getLogger("gunicorn.error").handlers
app.logger.setLevel(logging.getLogger("gunicorn.error").level)
app.logger.info("Starting contacts service.")
# Set up tracing and export spans to Cloud Trace.
if os.environ['ENABLE_TRACING'] == "true":
app.logger.info("✅ Tracing enabled.")
# Set up tracing and export spans to Cloud Trace
trace.set_tracer_provider(TracerProvider())
cloud_trace_exporter = CloudTraceSpanExporter()
trace.get_tracer_provider().add_span_processor(
BatchExportSpanProcessor(cloud_trace_exporter))
set_global_textmap(CloudTraceFormatPropagator())
FlaskInstrumentor().instrument_app(app)
else:
app.logger.info("🚫 Tracing disabled.")
# setup global variables
app.config["VERSION"] = os.environ.get("VERSION")
app.config["LOCAL_ROUTING"] = os.environ.get("LOCAL_ROUTING_NUM")
app.config["PUBLIC_KEY"] = open(os.environ.get("PUB_KEY_PATH"), "r").read()
# Configure database connection
try:
contacts_db = ContactsDb(os.environ.get("ACCOUNTS_DB_URI"), app.logger)
except OperationalError:
app.logger.critical("database connection failed")
sys.exit(1)
return app
def setup_tracing():
start_tracing()
# instrument our flask app instance eplicitly
FlaskInstrumentor().instrument_app(app)
