import os

from flask import Flask
from flask_restful import Api
from dns.resolver import Resolver
from flask_cors import CORS


dns_resolver = Resolver()


def create_app(config_name):
    app = Flask(__name__)
    if config_name == 'dev':
        app.config.from_object('resolverapi.config.DevelopmentConfig')
    else:
        app.config.from_object('resolverapi.config.BaseConfig')

    # Get nameservers from environment variable or default to OpenDNS resolvers
    if os.environ.get('RESOLVERS'):
        app.config['RESOLVERS'] = [addr.strip() for addr in os.environ.get('RESOLVERS').split(',')]
    # Respond with Access-Control-Allow-Origin headers. Use * to accept all
    if os.environ.get('CORS_ORIGIN'):
        CORS(app, origins=os.environ.get('CORS_ORIGIN'))

    dns_resolver.lifetime = 3.0

    from resolverapi.endpoints import ReverseLookup
    from resolverapi.endpoints import LookupRecordType
    api = Api(app)
    api.add_resource(ReverseLookup, '/reverse/<ip>')
    api.add_resource(LookupRecordType, '/<rdtype>/<domain>')

    @app.route('/')
    def root():
        """Health check. No data returned. Just 200."""
        return '', 200

    return app

import os

from flask import Flask, jsonify
from flask_restful import Api
from dns.resolver import Resolver
from flask_cors import CORS


dns_resolver = Resolver()


def create_app(config_name):
    app = Flask(__name__)
    if config_name == 'dev':
        app.config.from_object('resolverapi.config.DevelopmentConfig')
    else:
        app.config.from_object('resolverapi.config.BaseConfig')

    # Get nameservers from environment variable or default to OpenDNS resolvers
    if os.environ.get('RESOLVERS'):
        app.config['RESOLVERS'] = [addr.strip() for addr in os.environ.get('RESOLVERS').split(',')]
    # Respond with Access-Control-Allow-Origin headers. Use * to accept all
    if os.environ.get('CORS_ORIGIN'):
        CORS(app, origins=os.environ.get('CORS_ORIGIN'))

    dns_resolver.lifetime = 3.0

    from resolverapi.endpoints import ReverseLookup
    from resolverapi.endpoints import LookupRecordType
    api = Api(app)
    api.add_resource(ReverseLookup, '/reverse/<ip>')
    api.add_resource(LookupRecordType, '/<rdtype>/<domain>')

    @app.route('/')
    def root():
        """Provide user a link to the main page. Also this route acts as a health check, returns 200."""
        return jsonify({'message': "Check out www.openresolve.com for usage."}), 200

    return app

Create root page for api.openresolve.com
Create root page for api.openresolve.com

  import os
  
- from flask import Flask
+ from flask import Flask, jsonify
  from flask_restful import Api
  from dns.resolver import Resolver
  from flask_cors import CORS
  
  
  dns_resolver = Resolver()
  
  
  def create_app(config_name):
      app = Flask(__name__)
      if config_name == 'dev':
          app.config.from_object('resolverapi.config.DevelopmentConfig')
      else:
          app.config.from_object('resolverapi.config.BaseConfig')
  
      # Get nameservers from environment variable or default to OpenDNS resolvers
      if os.environ.get('RESOLVERS'):
          app.config['RESOLVERS'] = [addr.strip() for addr in os.environ.get('RESOLVERS').split(',')]
      # Respond with Access-Control-Allow-Origin headers. Use * to accept all
      if os.environ.get('CORS_ORIGIN'):
          CORS(app, origins=os.environ.get('CORS_ORIGIN'))
  
      dns_resolver.lifetime = 3.0
  
      from resolverapi.endpoints import ReverseLookup
      from resolverapi.endpoints import LookupRecordType
      api = Api(app)
      api.add_resource(ReverseLookup, '/reverse/<ip>')
      api.add_resource(LookupRecordType, '/<rdtype>/<domain>')
  
      @app.route('/')
      def root():
-         """Health check. No data returned. Just 200."""
-         return '', 200
+         """Provide user a link to the main page. Also this route acts as a health check, returns 200."""
+         return jsonify({'message': "Check out www.openresolve.com for usage."}), 200
  
      return app
  
Create root page for api.openresolve.com
## Code Before:
import os

from flask import Flask
from flask_restful import Api
from dns.resolver import Resolver
from flask_cors import CORS


dns_resolver = Resolver()


def create_app(config_name):
    app = Flask(__name__)
    if config_name == 'dev':
        app.config.from_object('resolverapi.config.DevelopmentConfig')
    else:
        app.config.from_object('resolverapi.config.BaseConfig')

    # Get nameservers from environment variable or default to OpenDNS resolvers
    if os.environ.get('RESOLVERS'):
        app.config['RESOLVERS'] = [addr.strip() for addr in os.environ.get('RESOLVERS').split(',')]
    # Respond with Access-Control-Allow-Origin headers. Use * to accept all
    if os.environ.get('CORS_ORIGIN'):
        CORS(app, origins=os.environ.get('CORS_ORIGIN'))

    dns_resolver.lifetime = 3.0

    from resolverapi.endpoints import ReverseLookup
    from resolverapi.endpoints import LookupRecordType
    api = Api(app)
    api.add_resource(ReverseLookup, '/reverse/<ip>')
    api.add_resource(LookupRecordType, '/<rdtype>/<domain>')

    @app.route('/')
    def root():
        """Health check. No data returned. Just 200."""
        return '', 200

    return app

## Instruction:
Create root page for api.openresolve.com
## Code After:
import os

from flask import Flask, jsonify
from flask_restful import Api
from dns.resolver import Resolver
from flask_cors import CORS


dns_resolver = Resolver()


def create_app(config_name):
    app = Flask(__name__)
    if config_name == 'dev':
        app.config.from_object('resolverapi.config.DevelopmentConfig')
    else:
        app.config.from_object('resolverapi.config.BaseConfig')

    # Get nameservers from environment variable or default to OpenDNS resolvers
    if os.environ.get('RESOLVERS'):
        app.config['RESOLVERS'] = [addr.strip() for addr in os.environ.get('RESOLVERS').split(',')]
    # Respond with Access-Control-Allow-Origin headers. Use * to accept all
    if os.environ.get('CORS_ORIGIN'):
        CORS(app, origins=os.environ.get('CORS_ORIGIN'))

    dns_resolver.lifetime = 3.0

    from resolverapi.endpoints import ReverseLookup
    from resolverapi.endpoints import LookupRecordType
    api = Api(app)
    api.add_resource(ReverseLookup, '/reverse/<ip>')
    api.add_resource(LookupRecordType, '/<rdtype>/<domain>')

    @app.route('/')
    def root():
        """Provide user a link to the main page. Also this route acts as a health check, returns 200."""
        return jsonify({'message': "Check out www.openresolve.com for usage."}), 200

    return app
