Connected frontend and backend in formatter

Backend-libXML/Parser.py

@@ -3,11 +3,11 @@ from lxml import etree
 
 def prettify(source: str) -> str:
     xml = etree.XML(source)
-    return etree.tostring(xml, pretty_print=True)
+    return etree.tostring(xml, pretty_print=True).decode()
 
 def minimize(source: str) -> str:
     xml = etree.XML(source)
-    return etree.tostring(xml, pretty_print=False)
+    return etree.tostring(xml, pretty_print=False).decode()
 
 
 def xpath(source: str, xpath: str) -> str:

Backend-libXML/main.py

@@ -15,6 +15,43 @@ cors = CORS(app, resource={
     }
 })
 
+def format_xml(request: request, type: str) -> str:
+    """Function to format XML 
+
+    :param request: Received request
+    :param type: Type of needed processing: xsd, xslt or xpath
+    :raises ValueError: is raised when type is different than those provided above
+    :return: response JSON converted to string and response code
+    """
+    start = time.time_ns()
+    code = 200
+    response_json = dict()
+    try:
+        request_data = json.loads(request.get_data(as_text=True))
+        data = request_data['data']
+        process = request_data['process']
+        if (type == "prettify"):
+            response_json['result'] = Parser.xsd(data, process)
+        elif (type == "minimize"):
+            response_json['result'] = Parser.xslt(data, process)
+        else:
+            raise ValueError("Valid operation types are: prettify, minimize")
+
+        response_json['status'] = "OK"
+    except KeyError as e:
+        response_json['result'] = "Missing key: " + str(e)
+        response_json['status'] = "ERR"
+        code = 400
+    except Exception as e:
+        response_json['result'] = str(e)
+        response_json['status'] = "ERR"
+        code = 400
+    finally:
+        exec_time = (time.time_ns() - start) / 10**6
+        response_json['time'] = f"{exec_time:.03f}"
+        response_json['processor'] = "libxml2 over lxml"
+        return json.dumps(response_json), code
+
 def process_xml(request: request, type: str) -> str:
     """Function to process 
 
@@ -36,6 +73,10 @@ def process_xml(request: request, type: str) -> str:
             response_json['result'] = Parser.xslt(data, process)
         elif (type == "xpath"):
             response_json['result'] = Parser.xpath(data, process)
+        elif (type == "prettify"):
+            response_json['result'] = Parser.prettify(data)
+        elif (type == "minimize"):
+            response_json['result'] = Parser.minimize(data)
         else:
             raise ValueError("Valid operation types are: xsd, xslt, xpath")
 
@@ -69,13 +110,11 @@ def xslt():
 
 @app.route("/prettifypost", methods=["POST"])
 def prettify():
-    request_data = json.loads(request.get_data(as_text=True))
-    return Parser.prettify(request_data['data'])
+    return process_xml(request, "prettify")
 
 @app.route("/minimizepost", methods=["POST"])
 def minimize():
-    request_data = json.loads(request.get_data(as_text=True))
-    return Parser.prettify(request_data['data'])
+    return process_xml(request, "minimize")
 
 if __name__ == "__main__":
     app.run()