From 2b84f3bd5de3a500b63193924bea2f3dfd0c9afd Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Wed, 21 Apr 2021 21:07:18 +0200
Subject: common base template, new logo and lots of cleanup

---
 talermerchantdemos/httpcommon/__init__.py | 65 ++++++++++++++++---------------
 1 file changed, 33 insertions(+), 32 deletions(-)

(limited to 'talermerchantdemos/httpcommon')

diff --git a/talermerchantdemos/httpcommon/__init__.py b/talermerchantdemos/httpcommon/__init__.py
index 443160b..39cd696 100644
--- a/talermerchantdemos/httpcommon/__init__.py
+++ b/talermerchantdemos/httpcommon/__init__.py
@@ -6,6 +6,16 @@ from datetime import datetime
 import time
 from flask_babel import gettext
 
+
+class BackendException(Exception):
+    """Exception for failed communication with the Taler merchant backend"""
+
+    def __init__(self, message, backend_status=None, backend_json=None):
+        super().__init__(message)
+        self.backend_status = backend_status
+        self.backend_json = backend_json
+
+
 ##
 # POST a request to the backend, and return a error
 # response if any error occurs.
@@ -14,28 +24,30 @@ from flask_babel import gettext
 #        this request.
 # @param json the POST's body.
 # @return the backend response (JSON format).
-def backend_post(backend_url, endpoint, json):
-    headers = {"Authorization": "ApiKey sandbox"}
+def backend_post(backend_url, endpoint, json, auth_token=None):
+    headers = dict()
+    if auth_token is not None:
+        headers["Authorization"] = "Bearer " + auth_token
     final_url = urljoin(backend_url, endpoint)
     print("POSTing to: " + final_url)
     try:
         resp = requests.post(final_url, json=json, headers=headers)
     except requests.ConnectionError:
-        err_abort(500, message=gettext("Could not establish connection to backend"))
+        raise BackendException(
+            message=gettext("Could not establish connection to backend")
+        )
     try:
         response_json = resp.json()
     except ValueError:
-        err_abort(
-            500,
+        raise BackendException(
             message=gettext("Could not parse response from backend"),
-            status_code=resp.status_code,
+            backend_status=resp.status_code,
         )
     if resp.status_code != 200:
-        err_abort(
-            500,
+        raise BackendException(
             message=gettext("Backend returned error status"),
-            json=response_json,
-            status_code=resp.status_code,
+            backend_status=resp.status_code,
+            backend_json=response_json,
         )
     print("Backend responds to {}: {}".format(final_url, str(response_json)))
     return response_json
@@ -48,24 +60,27 @@ def backend_post(backend_url, endpoint, json):
 # @param params (dict type of) URL parameters to append to the request.
 # @return the JSON response from the backend, or a error response
 #         if something unexpected happens.
-def backend_get(backend_url, endpoint, params):
-    headers = {"Authorization": "ApiKey sandbox"}
+def backend_get(backend_url, endpoint, params, auth_token=None):
+    headers = dict()
+    if auth_token is not None:
+        headers["Authorization"] = "Bearer " + auth_token
     final_url = urljoin(backend_url, endpoint)
     print("GETting: " + final_url + " with params: " + str(params))
     try:
         resp = requests.get(final_url, params=params, headers=headers)
     except requests.ConnectionError:
-        err_abort(500, message=gettext("Could not establish connection to backend"))
+        raise BackendException(
+            message=gettext("Could not establish connection to backend")
+        )
     try:
         response_json = resp.json()
     except ValueError:
-        err_abort(500, message=gettext("Could not parse response from backend"))
+        raise BackendException(message=gettext("Could not parse response from backend"))
     if resp.status_code != 200:
-        err_abort(
-            500,
+        raise BackendException(
             message=gettext("Backend returned error status"),
-            json=response_json,
-            status_code=resp.status_code,
+            backend_status=resp.status_code,
+            backend_json=response_json,
         )
     print("Backend responds to {}: {}".format(final_url, str(response_json)))
     return response_json
@@ -98,20 +113,6 @@ def self_localized(lang):
     return "/" + lang + "/" + parts[2]
 
 
-##
-# Return a error response to the client.
-#
-# @param abort_status_code status code to return along the response.
-# @param params _kw_ arguments to passed verbatim to the templating engine.
-def err_abort(abort_status_code, **params):
-    t = flask.render_template("templates/error.html.j2", lang=get_locale(), **params)
-    flask.abort(flask.make_response(t, abort_status_code))
-
-
-def fallback_404(error):
-    return "Page not found"
-
-
 class Deadline:
     def __init__(self, value):
         self.value = value
-- 
cgit v1.2.3