tiny_web

Python WSGI micro-framework to build api/site

Demo toy-blog: http://tinyblog666.herokuapp.com/

Source code of toy-blog: https://github.com/m3xan1k/tiny_blog

Installation

pip install tiny_web

Quickstart

from tiny_web.api import Api

app = Api()


# Basic route
@app.route("/home")
def home(request, response):
    response.text = "Hello from the HOME page"
    return response


# Parametrized route
@app.route("/hello/{name}")
def greeting(request, response, name):
    response.text = f"Hello, {name}"
    return response


'''
Class based controller.
Class methods are handlers for http request methods
'''
@app.route("/book")
class BooksResource:
    def get(self, req, resp):
        resp.text = "Books Page"
        return response

    def post(self, req, resp):
        resp.text = "Endpoint to create a book"
        return response


'''
You can response with templates.
Templates may be served in "templates" folder.
Jinja2 used as a template engine.
'''
@app.route("/template")
def template_handler(req, resp):
    resp.body = app.template(
        "index.html", context={"name": "Bumbo", "title": "Best Framework"}).encode()
    return response


'''
You also can use query string parameters.
"tiny_web" uses "webob" library to wrap requests and responses.
So if query looks like "/users?name=john" you can handle params like this.
See more on https://docs.pylonsproject.org/projects/webob/en/stable/reference.html
'''
@app.route("/users")
def users(request, response):
    name = request.GET.get("name")
    response.html = f"Hello {name}"
    return response


'''
You may use helpers for html or json
'''
@app.route("/users")
def users(request, response):
    response.html = app.template("users.html")
    return response


@app.route("/items")
def users(request, response):
    items = [{'id': 1, 'name': 'item_1'}, {'id': 2, 'name': 'item_2'}]
    response.json = {'items': items}
    return response

Unit Tests

The recommended way of writing unit tests is with pytest. There are two built in fixtures that you may want to use when writing unit tests with Bumbo. The first one is app which is an instance of the main API class:

def test_route_overlap_throws_exception(app):
    @app.route("/")
    def home(req, resp):
        resp.text = "Welcome Home."

    with pytest.raises(AssertionError):
        @app.route("/")
        def home2(req, resp):
            resp.text = "Welcome Home2."

The other one is client that you can use to send HTTP requests to your handlers. It is based on the famous requests and it should feel very familiar:

def test_parameterized_route(app, client):
    @app.route("/{name}")
    def hello(req, resp, name):
        resp.text = f"hey {name}"

    assert client.get("http://testserver/john").text == "hey john"

Templates

The default folder for templates is templates. You can change it when initializing the main Api() class:

app = Api(templates_dir="templates_dir_name")

Then you can use HTML files in that folder like so in a handler:

@app.route("/show/template")
def handler_with_template(req, resp):
    resp.html = app.template(
        "example.html", context={"title": "Hello", "body": "World!"})

Static Files

Just like templates, the default folder for static files is static and you can override it:

app = Api(static_dir="static_dir_name")

Then you can use the files inside this folder in HTML files:

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>{{title}}</title>

  <link href="/static/main.css" rel="stylesheet" type="text/css">
</head>

<body>
    <h1>{{body}}</h1>
    <p>This is a paragraph</p>
</body>
</html>

Also you may want use custom 404 page, just make '404.html' in the root of templates folder.

Middleware

You can create custom middleware classes by inheriting from the tiny_web.middleware.Middleware class and overriding its two methods that are called before and after each request:

from tiny_web.api import Api
from tiny_web.middleware import Middleware


app = Api()


class SimpleCustomMiddleware(Middleware):
    def process_request(self, req):
        print("Before dispatch", req.url)

    def process_response(self, req, res):
        print("After dispatch", req.url)


app.add_middleware(SimpleCustomMiddleware)

TODO: