from flask import jsonify from flask import make_response import json def make_response__json(status=200, data={}): """ Construct a json response with proper content-type header @param data: must be serializable via json.dumps """ data_str = json.dumps(data) resp = make_response(data_str) resp.headers['Content-Type'] = "application/json" resp.status = str(status) return resp def make_response__http__empty(status=200): """ Construct an empty HTTP response """ resp = make_response() resp.status = str(status) return resp def make_response__http__pre_tag_wrapped(html_str, status=200): """ Construct a '

' tag wrapped HTTP response
    """
    resp_arr = ['',
                '',
                html_str,
                ''
                ]
    return (''.join(resp_arr), 200)

def make_response__json__html(status=200, html_str=''):
    """
    Construct a json response with HTML payload
    """
    return make_response__json(data={'response__html': html_str })

def make_response__json__redirect(redirect_url, status=303, html_str=''):
    """
    Construct a json response with redirect payload
    """
    return make_response__json(data={'response__html': html_str,
                                    'redirect_url': redirect_url })

def common_resp_handle(data=None, error=None):
    """
    common response handling:
       - add common response headers
       - serialize response
    
    @data must be json serializable
    @error will be serialized with str()
    """

    def __response_wrap(data=None, error=None):
        """
        wrap response data/errors as dict - this should always be used when returning
        data to allow easy return of list objects, assist in error case distinction, etc. 
        """
        return dict(data=data, error=error)

    if error is None:
        error_str = ""
    else:
        error_str = str(error)  # convert any Exception objects to serializable form

    ret_data = __response_wrap(data, error_str)
    resp = jsonify(ret_data)  # this will create a Flask Response object

    resp.headers['Access-Control-Allow-Origin'] = '*'

    # more response processing

    return resp