old_contents: from flask import Flask, jsonify, render_template, request, current_app, redirect, flash
  from functools import wraps
  import json
  
  app = Flask(__name__)
  
  def jsonp(f):
  	'''Wrap JSONified output for JSONP'''
  	@wraps(f)
  	def decorated_function(*args, **kwargs):
  		callback = request.args.get('callback', False)
  		if callback:
  			content = str(callback) + '(' + str(f(*args,**kwargs)) + ')'
  			return current_app.response_class(content, 
  												mimetype='application/javascript')
  		else:
  			return f(*args, **kwargs)
  	return decorated_function
  
  @app.route('/test', methods=['GET'])
  @jsonp
  def test():
      flash('Previous', category='info')
      return jsonify({"foo":"bar"})
  
  @app.route('/_add_numbers')
  @jsonp
  def add_numbers():
      ''' Because numbers must be added server side '''
      a = request.args.get('a', 0, type=int)
      b = request.args.get('b', 0, type=int)
      return jsonify(result=a + b)
  
  
  @app.route('/')
  def index():
      return render_template('index.html')
  
  if __name__ == '__main__':
      app.run('0.0.0.0',port=4000)
  
new_contents: from flask import Flask, jsonify, render_template, request, current_app, redirect, flash
  from functools import wraps
  import json
  
  app = Flask(__name__)
  
  def jsonp(f):
  	'''Wrap JSONified output for JSONP'''
  	@wraps(f)
  	def decorated_function(*args, **kwargs):
  		callback = request.args.get('callback', False)
  		if callback:
  			content = str(callback) + '(' + str(f(*args,**kwargs)) + ')'
  			return current_app.response_class(content, 
  												mimetype='application/javascript')
  		else:
  			return f(*args, **kwargs)
  	return decorated_function
  
  @app.route('/test', methods=['GET'])
  @jsonp
  def test():
      flash('Previous', category='info')
      return jsonify({"foo":"bar"})
  
  @app.route('/comment', methods=['GET'])
  @jsonp
  def test():
      return render_template('dom_edit.html')
  
  @app.route('/_add_numbers')
  @jsonp
  def add_numbers():
      ''' Because numbers must be added server side '''
      a = request.args.get('a', 0, type=int)
      b = request.args.get('b', 0, type=int)
      return jsonify(result=a + b)
  
  
  @app.route('/')
  def index():
      return render_template('index.html')
  
  if __name__ == '__main__':
      app.run('0.0.0.0',port=4000)
  
subject: Add route for commenting page test