Add "verify" field to request to not save image

This makes it easy for the user to debug authentication.

imgupload.py

@@ -4,7 +4,7 @@ imgupload.py
 
 Flask application for processing images uploaded through POST requests.
 """
-from flask import Flask, request, jsonify, abort, Response
+from flask import Flask, request, jsonify, Response
 from flask_api import status
 from pathlib import Path
 import os
@@ -17,7 +17,7 @@ app = Flask(__name__)  # app is the app
 
 
 def allowed_extension(testext):
-    if testext in settings.ALLOWED_EXTENSIONS:
+    if testext.lower() in settings.ALLOWED_EXTENSIONS:
         return True
     else:
         return False
@@ -49,6 +49,11 @@ def upload():
             if request.form["uploadKey"] in validkeys:  # check if uploadKey is valid
                 print("Key is valid!")
 
+                if "verify" in request.form.keys():
+                    if request.form["verify"] == "true":
+                        print("Request is asking if key is valid (it is)")
+                        return jsonify({'status': 'key_valid'})
+
                 if "imageUpload" in request.files:  # check if image to upload was provided
                     f = request.files["imageUpload"]  # f is the image to upload
                 else:
@@ -81,21 +86,16 @@ def upload():
 
                 else:  # if the extension was invalid
                     print("Uploaded extension is invalid!")
-                    abort(415)
+                    return jsonify({'status': 'error', 'error': 'INVALID_EXTENSION'}), status.HTTP_415_UNSUPPORTED_MEDIA_TYPE
 
             else:  # if the key was not valid
                 print("Key is invalid!")
                 print("Request key: {0}".format(request.form["uploadKey"]))
-                abort(401)
+                return jsonify({'status': 'error', 'error': 'UNAUTHORIZED'}), status.HTTP_401_UNAUTHORIZED
 
         else:  # if uploadKey was not found in request body
             print("No uploadKey found in request!")
-            abort(401)
+            return jsonify({'status': 'error', 'error': 'UNAUTHORIZED'}), status.HTTP_401_UNAUTHORIZED
-
-
-    else:  # if the request method wasn't post
-        print("Request method was not POST!")
-        abort(405)
 
 if __name__ == "__main__":
     print("Run with `flask` or a WSGI server!")