prashanthwagle/xmlparser

XMLParser

Files

• xml_parser.py: The core logic to parse the XML files and build the tree structure

  • Class TreeNode: Class to create a node of the XML tree
  • Class ParseTree: A class to parse the XML string
    • build_tree(): Given an XML string, it builds a tree with the help of several helper functions such as _handle_tag
    • print_tree(): Prints the tree structure (level order traversal)
    • extract_tags(): Traverses through the built tree and extracts xml_datausing Depth First Search

• unit_tests.py: A list of unit tests to verify the working of xml_parser.py

• app.py: the flask server which invokes xml_parser.py and delivers the result

• run_app.py: Runs the flask server on port 3456, as per the requirements

How to run the server

First things first

Download this repository to a folder. You should have a folder XMLParser in your machine.

Install Prerequisites

Install Python 3 and pip

After installation of prerequisites

Navigate to the folder XMLParser via terminal Run python3 run_server.py on UNIX-based systems OR Run python run_server.py on Windows

Error Logging

Errors are logged to the terminal. The errors and warnings are described in xml_parser.py

Future work

• For now the errors and warnings are logged. Robust exception handling mechanisms should be introduced
  • For now, due to lack of time, I have focused on catching the errors but not on handling them
• Logging the data should enable insights and some sort of visualization
• Standardizing the error logs and connecting it to a database like Elasticache would enable better insights for the future
• Need to integerate it with some kind of a database so that the document is parsed only once and not on every request