cleaREST

Light-weight Python framework for building REST APIs

• WSGI
• minimalistic
• easy to use
• advanced variables processing
• automatic html documentation generation

URL Routing

is done by decorating your handling function with one of these decorators:

• @GET
• @POST

only one argument is required (url to handle) ie:

@GET("/my/awesome/url")
def my_function():
    ...

optionally you can specify successful http result status (default is HTTP_OK) ie:

@GET("/my/awesome/url", status=HTTP_CREATED)
def my_function():
    ...

list of status tuples:

• HTTP_OK
• HTTP_CREATED

Variables

• GET variables from query string

• POST variables can be send as:

• application/x-www-form-urlencoded
• multipart/form-data
• application/json

• url path variables (identifier inside curly brackets) ie:

  @GET("/my/awesome/url/{variable}")
  def my_function(variable):
      ...
  

Parsing

per parameter parsing function assigned as default value ie:

@GET("/my/awesome/url")
def my_function(myid=int):
    ...

optional parameter:

@GET("/my/awesome/url")
def my_function(myid=(int, 0)):
    ...

reduction multiple into one:

@GET("/my/awesome/url")
def my_function(user_id=lambda user, password: login):
    ...

Returning data

build-in support:

Class	Content-type
str	text/plain
dict	application/json
minidom	application/xml
etree	application/xml

you can also register any custom data-type or override table above with:

register_content_type(type_, content_type, handler)

Errors

to return a http error raise one of these exceptions:

• HttpBadRequest
• HttpNotFound
• HttpUnsupportedMediaType
• HttpNotImplemented

ie:

@GET("/my/awesome/url")
def my_function(myid=int):
    if myid == -1:
         raise HttpNotFound()
    ...

HTML Documentation

when is url opened by web-browser html documentation is shown instead of actual function call.

• "application/xhtml+xml" in accept http header
• similar tags to sphinx/docutils
• extra example tags: ":example:" and for response ":rexample":

ie:

@GET("/my/api")
def my_function(a, b=int):
    """
    Describe your function here.

    :param str a: Describe a here.
    :param int b: Describe b here.
    :return: W/E you function returns.

    :example::

        GET /my/api?a=someting&b=42

    :rexample::

        {
            "something": "something"
            ...
        }
    """
    ...

"real app" example:

Examples:

GET Hello world:

from wsgiref.simple_server import make_server
from clearest import application, GET


@GET("/")
def hello():
    return "hello world!"

 httpd = make_server("", 8000, application)
 httpd.serve_forever()

Output:

curl localhost:8000

hello world!

POST var:

from wsgiref.simple_server import make_server
from clearest import application, POST


@POST("/")
def hello(what):
    return "hello {what}!".format(what=what)


httpd = make_server("", 8000, application)
httpd.serve_forever()

Output:

curl --data "what=world" localhost:8000

hello world!