PyFeign - Declarative REST Client

Python implementation of Feign.

Installation

pip install pyfeign
# or
poetry install pyfeign

Usage

Decorate function with appropriate pyfeign.$method decorator:

@pyfeign.get(url='http://localhost/{id}')
def get_by_id(id: str = Path()) -> Dict[str, Any]:
    """
    Get by ID
    """


obj_dict = get_by_id('id123')

Parameters

• Path - Argument should be used as a path template variable. Reserved variable names can be used using the name parameter:

  @pyfeign.get(url='http://localhost/{id}')
  def get_by_id(id_val: str = Path(name='id')) -> Dict[str, Any]:
      """
      Get by ID
      """

• Query - Argument should be used as a query parameter, and can be optionally set with a default value if not provided

  @pyfeign.get(url='http://localhost/{id}')
  def get_by_id(id_val: str = Path, 
                summary: bool = Query(default=False, name='summary_details')) -> Dict[str, Any]:
      """
      Get by ID
  
      get_byt_id('id1', False) == http://localhost/id1?summary_details=False
      """

• Header - Argument will be used as an HTTP Header

• Cookie - Argument will be used as an HTTP Cookie

• Body - Argument will be sent as the request body (JSON serialized)

Classes

@pyfeign.Pyfeign(config=Config(base_url='https://postman-echo.com'))
class PostmanEcho:
    @pyfeign.get('/get')
    def get(self, foo1: str = Query(), foo2: str = Query(default='bar2')) -> Dict[str, Any]:
        pass

Responses

If the response function / method is typed with Dict or List, then the response json will be parsed and returned.

If return type is str then the response text will be returned

For either of these responses, the return code is asserted via Response.raise_for_status(), and so an HTTPError will be raised accordingly

Otherwise the full requests.Response object is returned.