diff options
Diffstat (limited to 'talerdonations/donations/donations.py')
| -rw-r--r-- | talerdonations/donations/donations.py | 113 |
1 files changed, 88 insertions, 25 deletions
diff --git a/talerdonations/donations/donations.py b/talerdonations/donations/donations.py index a7b41c2..9fd28c1 100644 --- a/talerdonations/donations/donations.py +++ b/talerdonations/donations/donations.py @@ -26,6 +26,10 @@ import random import requests import flask import traceback +import urllib +import qrcode +import qrcode.image.svg +import lxml.etree from taler.util.talerconfig import TalerConfig LOGGER = logging.getLogger(__name__) @@ -53,6 +57,7 @@ app.config.from_object(__name__) def utility_processor(): def env(name, default=None): return os.environ.get(name, default) + return dict(env=env) @@ -76,7 +81,9 @@ def err_abort(abort_status_code, **params): def backend_get(endpoint, params): headers = {"Authorization": "ApiKey " + APIKEY} try: - resp = requests.get(urljoin(BACKEND_URL, endpoint), params=params, headers=headers) + resp = requests.get( + urljoin(BACKEND_URL, endpoint), params=params, headers=headers + ) except requests.ConnectionError: err_abort(500, message="Could not establish connection to backend") try: @@ -84,8 +91,12 @@ def backend_get(endpoint, params): except ValueError: err_abort(500, message="Could not parse response from backend") if resp.status_code != 200: - err_abort(500, message="Backend returned error status", - json=response_json, status_code=resp.status_code) + err_abort( + 500, + message="Backend returned error status", + json=response_json, + status_code=resp.status_code + ) return response_json @@ -100,21 +111,29 @@ def backend_get(endpoint, params): def backend_post(endpoint, json): headers = {"Authorization": "ApiKey " + APIKEY} try: - resp = requests.post(urljoin(BACKEND_URL, endpoint), json=json, headers=headers) + resp = requests.post( + urljoin(BACKEND_URL, endpoint), json=json, headers=headers + ) except requests.ConnectionError: err_abort(500, message="Could not establish connection to backend") try: response_json = resp.json() except ValueError: - err_abort(500, message="Could not parse response from backend", - status_code=resp.status_code) + err_abort( + 500, + message="Could not parse response from backend", + status_code=resp.status_code + ) if resp.status_code != 200: - err_abort(500, message="Backend returned error status", - json=response_json, status_code=resp.status_code) + err_abort( + 500, + message="Backend returned error status", + json=response_json, + status_code=resp.status_code + ) return response_json - ## # Inspect GET arguments in the look for a parameter. # @@ -126,6 +145,7 @@ def expect_parameter(name): return err_abort(400, message="parameter '{}' required".format(name)) return val + ## # "Fallback" exception handler to capture all the unmanaged errors. # @@ -134,9 +154,12 @@ def expect_parameter(name): # (and execution stack!). @app.errorhandler(Exception) def internal_error(e): - return flask.render_template("templates/error.html", - message="Internal error", - stack=traceback.format_exc()) + return flask.render_template( + "templates/error.html", + message="Internal error", + stack=traceback.format_exc() + ) + ## # Serve the main index page. @@ -144,7 +167,10 @@ def internal_error(e): # @return response object of the index page. @app.route("/") def index(): - return flask.render_template("templates/index.html", merchant_currency=CURRENCY) + return flask.render_template( + "templates/index.html", merchant_currency=CURRENCY + ) + ## # Serve the "/javascript" page. @@ -155,7 +181,6 @@ def javascript_licensing(): return flask.render_template("templates/javascript.html") - ## # Serve the "/checkout" page. This page lets the # user pick the payment method they want to use, @@ -172,7 +197,8 @@ def checkout(): donation_amount=amount, donation_receiver=donation_receiver, donation_donor=donation_donor, - merchant_currency=CURRENCY) + merchant_currency=CURRENCY + ) ## @@ -182,8 +208,7 @@ def checkout(): # @return response object about the mentioned impossibility. @app.route("/provider-not-supported") def provider_not_supported(): - return flask.render_template( "templates/provider-not-supported.html") - + return flask.render_template("templates/provider-not-supported.html") ## @@ -201,18 +226,43 @@ def donate(): payment_system = expect_parameter("payment_system") if payment_system != "taler": return flask.redirect(flask.url_for("provider_not_supported")) - fulfillment_url = flask.url_for("fulfillment", receiver=donation_receiver, _external=True) + fulfillment_url = flask.url_for( + "fulfillment", receiver=donation_receiver, _external=True + ) order = dict( amount=donation_amount, - extra=dict(donor=donation_donor, receiver=donation_receiver, amount=donation_amount), + extra=dict( + donor=donation_donor, + receiver=donation_receiver, + amount=donation_amount + ), fulfillment_url=fulfillment_url, instance=donation_receiver, summary="Donation to {}".format(donation_receiver), ) order_resp = backend_post("order", dict(order=order)) order_id = order_resp["order_id"] - return flask.redirect(flask.url_for("fulfillment", receiver=donation_receiver, order_id=order_id)) + return flask.redirect( + flask.url_for( + "fulfillment", receiver=donation_receiver, order_id=order_id + ) + ) + + +## +# This endpoint is used by the payment request page +# to check if the payment has been completed via the QR code. +@app.route("/check-status/<order_id>") +def check_status(order_id, session_id): + pay_params = dict(instance=INSTANCE, order_id=order_id) + pay_status = backend_get("check-payment", pay_params) + return flask.jsonify(paid=pay_status["paid"]) + +def get_qrcode_svg(data): + factory = qrcode.image.svg.SvgImage + img = qrcode.make(data, image_factory=factory) + return lxml.etree.tostring(img.get_image()).decode("utf-8") ## @@ -226,12 +276,9 @@ def donate(): @app.route("/donation/<receiver>") def fulfillment(receiver): order_id = expect_parameter("order_id") - pay_params = dict(instance=receiver, - order_id=order_id) + pay_params = dict(instance=receiver, order_id=order_id) pay_status = backend_get("check-payment", pay_params) - if pay_status.get("payment_redirect_url"): - return flask.redirect(pay_status["payment_redirect_url"]) if pay_status.get("paid"): extra = pay_status["contract_terms"]["extra"] @@ -241,7 +288,23 @@ def fulfillment(receiver): donation_amount=extra["amount"], donation_donor=extra["donor"], order_id=order_id, - currency=CURRENCY) + currency=CURRENCY + ) + else: + taler_pay_uri = pay_status["taler_pay_uri"] + qrcode_svg = get_qrcode_svg(taler_pay_uri) + check_status_url_enc = urllib.parse.quote( + flask.url_for("check_status", order_id=order_id) + ) + content = flask.render_template( + "templates/request_payment.html", + taler_pay_uri=taler_pay_uri, + qrcode_svg=qrcode_svg, + check_status_url_enc=check_status_url_enc + ) + headers = {"Taler": taler_pay_uri} + resp = flask.Response(content, status=402, headers=headers) + return resp # no pay_redirect but article not paid, this should never happen! err_abort(500, message="Internal error, invariant failed", json=pay_status) |