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Implementations of flask response in many format notation

Project description

Implementations of flask response in many formats: base64, csv, json, xml, html, yaml. You can create your own builder extending Builder class and registering it with register_builder method.

Every builders are registered as attribute of ResponseBuilder class so you can invoke method from this class with builder’s name and it automatically create a response with that builder.

Also you can used Builder without response by invoking static methods: to_me, to_dict.

Based on PyYAML, xmltodict, dicttoxml. See their documentation for other options.

  • Decorator for http response status 204 NO_CONTENT
  • Response based on Accept header of request
  • Response based on format parameter (query string)
  • template_or_json: response based on xhr request (deprecated: works only with old js library)
  • Support for case notation checker and converter, see Case utility class.
  • Transformer: utility class for data notation conversion


Install flask_response_builder using pip:

$ pip install Flask-ResponseBuilder

Then import it into your project:

$ from flask_response_builder import ResponseBuilder

Example usage

app = Flask(__name__)
app.config['RB_HTML_DEFAULT_TEMPLATE'] = 'response.html'
rb = ResponseBuilder(app)

def nocontent():

def test_xhr():
    return data

@rb.on_accept(acceptable=['application/json', 'application/xml'])
def test_accept():
    return data

def test_format():
    return data

def test_decorator():
    return data, 200, {'header': 'header'}

For advanced example usage see file.


  1. RB_DEFAULT_RESPONSE_FORMAT: (default: ‘application/json’)
  2. RB_DEFAULT_ACCEPTABLE_MIMETYPES: (default: a list of all supported mimetypes)
  3. RB_DEFAULT_ENCODE: (default: ‘utf-8’)
  4. RB_DEFAULT_DUMP_INDENT: (default: None)
  5. RB_FORMAT_KEY: (default: ‘format’)
  6. RB_BASE64_ALTCHARS: (default: None)
  7. RB_HTML_DEFAULT_TEMPLATE: (default: None)
  8. RB_HTML_AS_TABLE: (default: True)
  9. RB_YAML_ALLOW_UNICODE: (default: True)
  10. RB_CSV_DEFAULT_NAME: (default: ‘filename’)
  11. RB_CSV_DELIMITER: (default: ‘;’)
  12. RB_CSV_QUOTING_CHAR: (default: ‘”’)
  13. RB_CSV_DIALECT: (default: ‘excel-tab’)
  14. RB_XML_CDATA: (default: False)
  15. RB_XML_ROOT: (default: ‘ROOT’)
  16. RB_FLATTEN_PREFIX: (default: ‘’)
  17. RB_FLATTEN_SEPARATOR: (default: ‘_’)

License MIT

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