onlineParser/server_code/ServerModule1.py

import anvil.tables as tables
import anvil.tables.query as q
from anvil.tables import app_tables
import anvil.server
import yaml
import json 
import pprint
from json.decoder import JSONDecodeError

# This is a server module. It runs on the Anvil server,
# rather than in the user's browser.
#
# To allow anvil.server.call() to call functions here, we mark
# them with @anvil.server.callable.
# Here is an example - you can replace it with your own:
#
@anvil.server.callable
def parse_yaml(yaml_data):
  try:
    return (0,pprint.pformat(yaml.safe_load(yaml_data), indent=2))
  except yaml.YAMLError as exc:
    if hasattr(exc, 'problem_mark'):
        if exc.context != None:
            error_message = ('Error while parsing YAML file:\n'+
                              'parser says\n' + str(exc.problem_mark) + '\n  ' +
                str(exc.problem) + ' ' + str(exc.context) +
                '\nPlease correct data and retry.')
        else:
            error_message = ('Error while parsing YAML file:\n'+'  parser says\n' + str(exc.problem_mark) + '\n  ' +
                str(exc.problem) + '\nPlease correct data and retry.')
    else:
        error_message =  ("Something went wrong while parsing yaml file")
    return (1,error_message)
#

@anvil.server.callable
def parse_json(json_data):
  try:
    return (0,pprint.pformat(json.loads(json_data), indent=2),0,0)
  except JSONDecodeError as exc:
    
    error_message = ""
    if exc.lineno - 1 >= 0:
      error_message = error_message + json_data.splitlines()[exc.lineno - 3] + '\n'
    if exc.lineno >= 0:
      error_message = error_message + json_data.splitlines()[exc.lineno - 2] + '\n'
    error_message = error_message + json_data.splitlines()[exc.lineno - 1] + '\n'
    if len(json_data.splitlines()) != exc.lineno:
      error_message = error_message + json_data.splitlines()[exc.lineno] + '\n'
    return (1,exc.msg, exc.lineno, exc.colno)