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"""General request utilities"""
from typing import Optional, Callable
from urllib.parse import urljoin, urlparse
from requests.exceptions import JSONDecodeError
import simplejson
from flask import (
flash, request, url_for, redirect, Response, render_template,
current_app as app)
from gn2.wqflask.external_errors import ExternalRequestError
from .client import (
SCOPE, oauth2_get, authserver_uri, oauth2_clientid, oauth2_clientsecret)
def authserver_authorise_uri():
req_baseurl = urlparse(request.base_url, scheme=request.scheme)
host_uri = f"{req_baseurl.scheme}://{req_baseurl.netloc}/"
return urljoin(
authserver_uri(),
"auth/authorise?response_type=code"
f"&client_id={oauth2_clientid()}"
f"&redirect_uri={urljoin(host_uri, 'oauth2/code')}")
def user_details():
def __handle_error__(err):
error = process_error(err)
msg = (
f"Error from AUTH Server:\n\nError:\t{error['error']}\n\n"
f"{error['error-trace']}\nStatus Code:\t{error['status_code']}\n\n")
app.logger.error(msg)
raise Exception(msg)
return oauth2_get("auth/user/").either(__handle_error__,
lambda usr_dets: usr_dets)
def process_error(error: Response,
message: str=("Requested endpoint was not found on the API "
"server.")
) -> dict:
if error.status_code in range(400, 500):
try:
err = error.json()
msg = err.get(
"error_message", err.get("error_description", f"{error.reason}"))
except simplejson.errors.JSONDecodeError as _jde:
msg = message
return {
"error": error.reason,
"error_message": msg,
"error_description": msg,
"status_code": error.status_code
}
try:
return {**error.json(), "status_code": error.status_code}
except JSONDecodeError as exc:
raise ExternalRequestError(
error.url,
exc,
f"Could not parse error record into JSON:\n\n{error.content}")
def request_error(response):
app.logger.error(f"{response}: {response.url} [{response.status_code}]")
return render_template("oauth2/request_error.html", response=response)
def handle_error(redirect_uri: Optional[str] = None, **kwargs):
def __handler__(error):
error_json = process_error(error)# error.json()
msg = error_json.get(
"error_message", error_json.get(
"error_description", "undefined error"))
flash(f"{error_json['error']}: {msg}.",
"alert-danger")
if "response_handlers" in kwargs:
for handler in kwargs["response_handlers"]:
handler(response)
if redirect:
return redirect(url_for(redirect_uri, **kwargs))
return __handler__
def handle_success(
success_msg: str, redirect_uri: Optional[str] = None, **kwargs):
def __handler__(response):
flash(f"Success: {success_msg}.", "alert-success")
if "response_handlers" in kwargs:
for handler in kwargs["response_handlers"]:
handler(response)
if redirect:
return redirect(url_for(redirect_uri, **kwargs))
return __handler__
def flash_error(error):
flash(f"{error['error']}: {error['error_description']}", "alert-danger")
def flash_success(success):
flash(f"{success['description']}", "alert-success")
def with_flash_error(response) -> Callable:
def __err__(err) -> Response:
error = process_error(err)
flash(f"{error['status_code']} {error['error']}: "
f"{error['error_description']}",
"alert-danger")
return response
return __err__
def with_flash_success(response) -> Callable:
def __succ__(msg) -> Response:
flash(f"Success: {msg['message']}", "alert-success")
return response
return __succ__
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