Advanced to version 0.2.2.

MANIFEST.in

@@ -15,4 +15,8 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
+include docs/*
+include docs/source/*
+include docs/source/_static/*
+include docs/source/_templates/*
 include tests/*

README.rst

@@ -12,15 +12,17 @@ views.
 
 HTTP Digest Authentication is specified in `RFC 2617`_.
 
+Refer to the full `Flask-Digest-Auth readthedocs documentation`_.
+
 
 Why HTTP Digest Authentication?
 -------------------------------
 
-HTTP Digest Authentication has the advantage that it does not send the
-actual password to the server, which greatly enhances the security.
-It uses the challenge-response authentication scheme.  The client
-returns the response calculated from the challenge and the password,
-but not the original password.
+*HTTP Digest Authentication* has the advantage that it does not send
+thee actual password to the server, which greatly enhances the
+security.  It uses the challenge-response authentication scheme.  The
+client returns the response calculated from the challenge and the
+password, but not the original password.
 
 Log in forms has the advantage of freedom, in the senses of both the
 visual design and the actual implementation.  You may implement your
@@ -33,51 +35,6 @@ separated with the authentication mechanism.  You can create protected
 Flask modules without knowing the actual authentication mechanisms.
 
 
-Features
---------
-
-There are a couple of Flask HTTP digest authentication
-implementations.  Flask-Digest-Auth has the following features:
-
-
-Flask-Login Integration
-#######################
-
-Flask-Digest-Auth features Flask-Login integration.  The views
-can be totally independent with the actual authentication mechanism.
-You can write a Flask module that requires log in, without specify
-the actual authentication mechanism.  The application can specify
-either HTTP Digest Authentication, or the log in forms, as needed.
-
-
-Session Integration
-###################
-
-Flask-Digest-Auth features session integration.  The user log in
-is remembered in the session.  The authentication information is not
-requested again.  This is different to the practice of the HTTP Digest
-Authentication, but is convenient for the log in accounting.
-
-
-Log Out Support
-###############
-
-Flask-Digest-Auth supports log out.  The user will be prompted for
-new username and password.
-
-
-Log In Bookkeeping
-##################
-
-You can register a callback to run when the user logs in.
-
-
-.. _HTTP Digest Authentication: https://en.wikipedia.org/wiki/Digest_access_authentication
-.. _RFC 2617: https://www.rfc-editor.org/rfc/rfc2617
-.. _Flask: https://flask.palletsprojects.com
-.. _Flask-Login: https://flask-login.readthedocs.io
-
-
 Installation
 ============
 
@@ -92,11 +49,25 @@ You may also install the latest source from the
 
 ::
 
-    git clone git@github.com:imacat/flask-digest-auth.git
-    cd flask-digest-auth
-    pip install .
+    pip install git+https://github.com/imacat/flask-digest-auth.git
 
-.. _Flask-Digest-Auth GitHub repository: https://github.com/imacat/flask-digest-auth
+
+Setting the Password
+====================
+
+The password hash of the HTTP Digest Authentication is composed of the
+realm, the username, and the password.  Example for setting the
+password:
+
+::
+
+    from flask_digest_auth import make_password_hash
+
+    user.password = make_password_hash(realm, username, password)
+
+The username is part of the hash.  If the user changes their username,
+you need to ask their password, to generate and store the new password
+hash.
 
 
 Flask-Digest-Auth Alone
@@ -104,11 +75,9 @@ Flask-Digest-Auth Alone
 
 Flask-Digest-Auth can authenticate the users alone.
 
-The currently logged-in user can be retrieved at ``g.user``, if any.
 
-
-Example for Simple Applications with Flask-Digest-Auth Alone
-------------------------------------------------------------
+Simple Applications with Flask-Digest-Auth Alone
+------------------------------------------------
 
 In your ``my_app.py``:
 
@@ -143,8 +112,8 @@ In your ``my_app.py``:
         return redirect(request.form.get("next"))
 
 
-Example for Larger Applications with ``create_app()`` with Flask-Digest-Auth Alone
-----------------------------------------------------------------------------------
+Larger Applications with ``create_app()`` with Flask-Digest-Auth Alone
+----------------------------------------------------------------------
 
 In your ``my_app/__init__.py``:
 
@@ -196,23 +165,29 @@ In your ``my_app/views.py``:
         app.register_blueprint(bp)
 
 
+
 Flask-Login Integration
 =======================
 
-Flask-Digest-Auth can work with Flask-Login.  You can write a Flask
-module that requires log in, without specifying the authentication
-mechanism.  The Flask application can specify the actual
-authentication mechanism as it sees fit.
+Flask-Digest-Auth works with Flask-Login_.  You can write a Flask
+module that requires log in, without specifying how to log in.  The
+application can use either HTTP Digest Authentication, or the log in
+forms, as needed.
 
+To use Flask-Login with Flask-Digest-Auth,
 ``login_manager.init_app(app)`` must be called before
 ``auth.init_app(app)``.
 
 The currently logged-in user can be retrieved at
 ``flask_login.current_user``, if any.
 
+The views only depend on Flask-Login, but not the Flask-Digest-Auth.
+You can change the actual authentication mechanism without changing
+the views.
 
-Example for Simple Applications with Flask-Login Integration
-------------------------------------------------------------
+
+Simple Applications with Flask-Login Integration
+------------------------------------------------
 
 In your ``my_app.py``:
 
@@ -252,8 +227,8 @@ In your ``my_app.py``:
         return redirect(request.form.get("next"))
 
 
-Example for Larger Applications with ``create_app()`` with Flask-Login Integration
-----------------------------------------------------------------------------------
+Larger Applications with ``create_app()`` with Flask-Login Integration
+----------------------------------------------------------------------
 
 In your ``my_app/__init__.py``:
 
@@ -315,31 +290,13 @@ authentication mechanism.  You can change the actual authentication
 mechanism without changing the views.
 
 
-Setting the Password Hash
-=========================
+Session Integration
+===================
 
-The password hash of the HTTP Digest Authentication is composed of the
-realm, the username, and the password.  Example for setting the
-password:
-
-::
-
-    from flask_digest_auth import make_password_hash
-
-    user.password = make_password_hash(realm, username, password)
-
-The username is part of the hash.  If the user changes their username,
-you need to ask their password, to generate and store the new password
-hash.
-
-
-Log Out
-=======
-
-Call ``auth.logout()`` when the user wants to log out.
-Besides the usual log out routine, ``auth.logout()`` actually causes
-the next browser automatic authentication to fail, forcing the browser
-to ask the user for the username and password again.
+Flask-Digest-Auth features session integration.  The user log in
+is remembered in the session.  The authentication information is not
+requested again.  This is different to the practice of the HTTP Digest
+Authentication, but is convenient for the log in accounting.
 
 
 Log In Bookkeeping
@@ -355,13 +312,22 @@ logging the log in event, adding the log in counter, etc.
         user.visits = user.visits + 1
 
 
-Writing Tests
-=============
+Log Out
+=======
 
-You can write tests with our test client that handles HTTP Digest
-Authentication.
+Flask-Digest-Auth supports log out.  The user will be prompted for the
+new username and password.
 
-Example for a unittest_ test case:
+
+Test Client
+===========
+
+Flask-Digest-Auth comes with a test client that supports HTTP digest
+authentication.
+
+
+A unittest Test Case
+--------------------
 
 ::
 
@@ -388,8 +354,8 @@ Example for a unittest_ test case:
             self.assertEqual(response.status_code, 200)
 
 
-
-Example for a pytest_ test:
+A pytest Test
+-------------
 
 ::
 
@@ -419,9 +385,6 @@ Example for a pytest_ test:
                 "/admin", digest_auth=("my_name", "my_pass"))
             assert response.status_code == 200
 
-.. _unittest: https://docs.python.org/3/library/unittest.html
-.. _pytest: https://pytest.org
-
 
 Copyright
 =========
@@ -447,3 +410,10 @@ Authors
 | imacat
 | imacat@mail.imacat.idv.tw
 | 2022/11/23
+
+.. _HTTP Digest Authentication: https://en.wikipedia.org/wiki/Digest_access_authentication
+.. _RFC 2617: https://www.rfc-editor.org/rfc/rfc2617
+.. _Flask: https://flask.palletsprojects.com
+.. _Flask-Digest-Auth GitHub repository: https://github.com/imacat/flask-digest-auth
+.. _Flask-Digest-Auth readthedocs documentation: https://flask-digest-auth.readthedocs.io
+.. _Flask-Login: https://flask-login.readthedocs.io

docs/Makefile

@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = source
+BUILDDIR      = build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

docs/make.bat

@@ -0,0 +1,35 @@
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=source
+set BUILDDIR=build
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.http://sphinx-doc.org/
+	exit /b 1
+)
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd

docs/source/conf.py

@@ -0,0 +1,59 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+import os
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+import sys
+
+sys.path.insert(0, os.path.abspath('../../src/'))
+
+
+# -- Project information -----------------------------------------------------
+
+project = 'Flask-Digest-Auth'
+copyright = '2022, imacat'
+author = 'imacat'
+
+# The full version, including alpha/beta/rc tags
+release = '0.2.1'
+
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    "sphinx.ext.autodoc"
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = []
+
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'sphinx_rtd_theme'
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# For readthedocs.io to work properly.
+master_doc = 'index'

docs/source/examples.rst

@@ -0,0 +1,268 @@
+Examples
+========
+
+
+.. _example-alone-simple:
+
+Simple Applications with Flask-Digest-Auth Alone
+------------------------------------------------
+
+In your ``my_app.py``:
+
+::
+
+    from flask import Flask, request, redirect
+    from flask_digest_auth import DigestAuth
+
+    app: flask = Flask(__name__)
+    ... (Configure the Flask application) ...
+
+    auth: DigestAuth = DigestAuth(realm="Admin")
+    auth.init_app(app)
+
+    @auth.register_get_password
+    def get_password_hash(username: str) -> t.Optional[str]:
+        ... (Load the password hash) ...
+
+    @auth.register_get_user
+    def get_user(username: str) -> t.Optional[t.Any]:
+        ... (Load the user) ...
+
+    @app.get("/admin")
+    @auth.login_required
+    def admin():
+        return f"Hello, {g.user.username}!"
+
+    @app.post("/logout")
+    @auth.login_required
+    def logout():
+        auth.logout()
+        return redirect(request.form.get("next"))
+
+
+.. _example-alone-large:
+
+Larger Applications with ``create_app()`` with Flask-Digest-Auth Alone
+----------------------------------------------------------------------
+
+In your ``my_app/__init__.py``:
+
+::
+
+    from flask import Flask
+    from flask_digest_auth import DigestAuth
+
+    auth: DigestAuth = DigestAuth()
+
+    def create_app(test_config = None) -> Flask:
+        app: flask = Flask(__name__)
+        ... (Configure the Flask application) ...
+
+        auth.realm = app.config["REALM"]
+        auth.init_app(app)
+
+        @auth.register_get_password
+        def get_password_hash(username: str) -> t.Optional[str]:
+            ... (Load the password hash) ...
+
+        @auth.register_get_user
+        def get_user(username: str) -> t.Optional[t.Any]:
+            ... (Load the user) ...
+
+        return app
+
+In your ``my_app/views.py``:
+
+::
+
+    from my_app import auth
+    from flask import Flask, Blueprint, request, redirect
+
+    bp = Blueprint("admin", __name__, url_prefix="/admin")
+
+    @bp.get("/admin")
+    @auth.login_required
+    def admin():
+        return f"Hello, {g.user.username}!"
+
+    @app.post("/logout")
+    @auth.login_required
+    def logout():
+        auth.logout()
+        return redirect(request.form.get("next"))
+
+    def init_app(app: Flask) -> None:
+        app.register_blueprint(bp)
+
+
+.. _example-flask-login-simple:
+
+Simple Applications with Flask-Login Integration
+------------------------------------------------
+
+In your ``my_app.py``:
+
+::
+
+    import flask_login
+    from flask import Flask, request, redirect
+    from flask_digest_auth import DigestAuth
+
+    app: flask = Flask(__name__)
+    ... (Configure the Flask application) ...
+
+    login_manager: flask_login.LoginManager = flask_login.LoginManager()
+    login_manager.init_app(app)
+
+    @login_manager.user_loader
+    def load_user(user_id: str) -> t.Optional[User]:
+        ... (Load the user with the username) ...
+
+    auth: DigestAuth = DigestAuth(realm="Admin")
+    auth.init_app(app)
+
+    @auth.register_get_password
+    def get_password_hash(username: str) -> t.Optional[str]:
+        ... (Load the password hash) ...
+
+    @app.get("/admin")
+    @flask_login.login_required
+    def admin():
+        return f"Hello, {flask_login.current_user.get_id()}!"
+
+    @app.post("/logout")
+    @flask_login.login_required
+    def logout():
+        auth.logout()
+        # Do not call flask_login.logout_user()
+        return redirect(request.form.get("next"))
+
+
+.. _example-flask-login-large:
+
+Larger Applications with ``create_app()`` with Flask-Login Integration
+----------------------------------------------------------------------
+
+In your ``my_app/__init__.py``:
+
+::
+
+    from flask import Flask
+    from flask_digest_auth import DigestAuth
+    from flask_login import LoginManager
+
+    auth: DigestAuth = DigestAuth()
+
+    def create_app(test_config = None) -> Flask:
+        app: flask = Flask(__name__)
+        ... (Configure the Flask application) ...
+
+        login_manager: LoginManager = LoginManager()
+        login_manager.init_app(app)
+
+        @login_manager.user_loader
+        def load_user(user_id: str) -> t.Optional[User]:
+            ... (Load the user with the username) ...
+
+        auth.realm = app.config["REALM"]
+        auth.init_app(app)
+
+        @auth.register_get_password
+        def get_password_hash(username: str) -> t.Optional[str]:
+            ... (Load the password hash) ...
+
+        return app
+
+In your ``my_app/views.py``:
+
+::
+
+    import flask_login
+    from flask import Flask, Blueprint, request, redirect
+    from my_app import auth
+
+    bp = Blueprint("admin", __name__, url_prefix="/admin")
+
+    @bp.get("/admin")
+    @flask_login.login_required
+    def admin():
+        return f"Hello, {flask_login.current_user.get_id()}!"
+
+    @app.post("/logout")
+    @flask_login.login_required
+    def logout():
+        auth.logout()
+        # Do not call flask_login.logout_user()
+        return redirect(request.form.get("next"))
+
+    def init_app(app: Flask) -> None:
+        app.register_blueprint(bp)
+
+The views only depend on Flask-Login, but not the actual
+authentication mechanism.  You can change the actual authentication
+mechanism without changing the views.
+
+
+.. _example-unittest:
+
+A unittest Test Case
+--------------------
+
+::
+
+    from flask import Flask
+    from flask_digest_auth import Client
+    from flask_testing import TestCase
+    from my_app import create_app
+
+    class MyTestCase(TestCase):
+
+        def create_app(self):
+            app: Flask = create_app({
+                "SECRET_KEY": token_urlsafe(32),
+                "TESTING": True
+            })
+            app.test_client_class = Client
+            return app
+
+        def test_admin(self):
+            response = self.client.get("/admin")
+            self.assertEqual(response.status_code, 401)
+            response = self.client.get(
+                "/admin", digest_auth=("my_name", "my_pass"))
+            self.assertEqual(response.status_code, 200)
+
+
+
+.. _example-pytest:
+
+A pytest Test
+-------------
+
+::
+
+    import pytest
+    from flask import Flask
+    from flask_digest_auth import Client
+    from my_app import create_app
+
+    @pytest.fixture()
+    def app():
+        app: Flask = create_app({
+            "SECRET_KEY": token_urlsafe(32),
+            "TESTING": True
+        })
+        app.test_client_class = Client
+        yield app
+
+    @pytest.fixture()
+    def client(app):
+        return app.test_client()
+
+    def test_admin(app: Flask, client: Client):
+        with app.app_context():
+            response = self.client.get("/admin")
+            assert response.status_code == 401
+            response = self.client.get(
+                "/admin", digest_auth=("my_name", "my_pass"))
+            assert response.status_code == 200

docs/source/flask_digest_auth.rst

@@ -0,0 +1,24 @@
+flask\_digest\_auth package
+===========================
+
+The ``DigestAuth`` Class
+------------------------
+.. autoclass:: flask_digest_auth.DigestAuth
+    :members:
+    :undoc-members:
+    :show-inheritance:
+
+The ``make_password_hash`` Function
+-----------------------------------
+.. autofunction:: flask_digest_auth.make_password_hash
+
+The ``calc_response`` Function
+------------------------------
+.. autofunction:: flask_digest_auth.calc_response
+
+The ``Client`` Test Class
+-------------------------
+.. autoclass:: flask_digest_auth.Client
+    :members:
+    :undoc-members:
+    :show-inheritance:

docs/source/index.rst

@@ -0,0 +1,34 @@
+.. flask-digest-auth documentation master file, created by
+   sphinx-quickstart on Tue Dec  6 15:15:08 2022.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Welcome to Flask-Digest-Auth's documentation!
+=============================================
+
+*Flask-Digest-Auth* is an `HTTP Digest Authentication`_ implementation
+for Flask_ applications.  It authenticates the user for the protected
+views.
+
+HTTP Digest Authentication is specified in `RFC 2617`_.
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+   intro
+   flask_digest_auth
+   examples
+
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
+
+.. _HTTP Digest Authentication: https://en.wikipedia.org/wiki/Digest_access_authentication
+.. _RFC 2617: https://www.rfc-editor.org/rfc/rfc2617
+.. _Flask: https://flask.palletsprojects.com

docs/source/intro.rst

@@ -0,0 +1,148 @@
+Introduction
+============
+
+
+*Flask-Digest-Auth* is an `HTTP Digest Authentication`_ implementation
+for Flask_ applications.  It authenticates the user for the protected
+views.
+
+HTTP Digest Authentication is specified in `RFC 2617`_.
+
+
+Why HTTP Digest Authentication?
+-------------------------------
+
+*HTTP Digest Authentication* has the advantage that it does not send
+the actual password to the server, which greatly enhances the
+security.  It uses the challenge-response authentication scheme.  The
+client returns the response calculated from the challenge and the
+password, but not the original password.
+
+Log in forms has the advantage of freedom, in the senses of both the
+visual design and the actual implementation.  You may implement your
+own challenge-response log in form, but then you are reinventing the
+wheels.  If a pretty log in form is not critical to your project, HTTP
+Digest Authentication should be a good choice.
+
+Flask-Digest-Auth works with Flask-Login_.  Log in protection can be
+separated with the authentication mechanism.  You can create protected
+Flask modules without knowing the actual authentication mechanisms.
+
+
+Installation
+------------
+
+You can install Flask-Digest-Auth with ``pip``:
+
+::
+
+    pip install Flask-Digest-Auth
+
+You may also install the latest source from the
+`Flask-Digest-Auth GitHub repository`_.
+
+::
+
+    pip install git+https://github.com/imacat/flask-digest-auth.git
+
+
+Setting the Password
+--------------------
+
+The password hash of the HTTP Digest Authentication is composed of the
+realm, the username, and the password.  Example for setting the
+password:
+
+::
+
+    from flask_digest_auth import make_password_hash
+
+    user.password = make_password_hash(realm, username, password)
+
+The username is part of the hash.  If the user changes their username,
+you need to ask their password, to generate and store the new password
+hash.
+
+See :meth:`flask_digest_auth.make_password_hash`.
+
+
+Flask-Digest-Auth Alone
+-----------------------
+
+Flask-Digest-Auth can authenticate the users alone.
+
+See :ref:`example-alone-simple` and :ref:`example-alone-large`.
+
+
+Flask-Login Integration
+-----------------------
+
+Flask-Digest-Auth works with Flask-Login_.  You can write a Flask
+module that requires log in, without specifying how to log in.  The
+application can use either HTTP Digest Authentication, or the log in
+forms, as needed.
+
+To use Flask-Login with Flask-Digest-Auth,
+``login_manager.init_app(app)`` must be called before
+``auth.init_app(app)``.
+
+The currently logged-in user can be retrieved at
+``flask_login.current_user``, if any.
+
+See :ref:`example-flask-login-simple` and
+:ref:`example-flask-login-large`.
+
+The views only depend on Flask-Login, but not the Flask-Digest-Auth.
+You can change the actual authentication mechanism without changing
+the views.
+
+
+Session Integration
+-------------------
+
+Flask-Digest-Auth features session integration.  The user log in
+is remembered in the session.  The authentication information is not
+requested again.  This is different to the practice of the HTTP Digest
+Authentication, but is convenient for the log in accounting.
+
+
+Log In Bookkeeping
+------------------
+
+You can register a callback to run when the user logs in, for ex.,
+logging the log in event, adding the log in counter, etc.
+
+::
+
+    @auth.register_on_login
+    def on_login(user: User) -> None:
+        user.visits = user.visits + 1
+
+See :meth:`flask_digest_auth.DigestAuth.register_on_login`.
+
+
+Log Out
+-------
+
+Flask-Digest-Auth supports log out.  The user will be prompted for the
+new username and password.
+
+See :meth:`flask_digest_auth.DigestAuth.logout`.
+
+
+Test Client
+-----------
+
+Flask-Digest-Auth comes with a test client that supports HTTP digest
+authentication.
+
+See :class:`flask_digest_auth.Client`.
+
+Also see :ref:`example-unittest` and :ref:`example-pytest`.
+
+
+.. _HTTP Digest Authentication: https://en.wikipedia.org/wiki/Digest_access_authentication
+.. _RFC 2617: https://www.rfc-editor.org/rfc/rfc2617
+.. _Flask: https://flask.palletsprojects.com
+.. _Flask-Login: https://flask-login.readthedocs.io
+.. _Flask-Digest-Auth GitHub repository: https://github.com/imacat/flask-digest-auth

setup.cfg

@@ -17,7 +17,7 @@
 
 [metadata]
 name = flask-digest-auth
-version = 0.2.1
+version = 0.2.2
 author = imacat
 author_email = imacat@mail.imacat.idv.tw
 description = The Flask HTTP Digest Authentication project.

src/flask_digest_auth/algo.py

@@ -23,11 +23,16 @@ from __future__ import annotations
 import typing as t
 from hashlib import md5
 
-from flask_digest_auth.exception import UnauthorizedException
-
 
 def make_password_hash(realm: str, username: str, password: str) -> str:
     """Calculates the password hash for the HTTP digest authentication.
+    Use this function to set the password for the user.
+
+    For example:
+
+    ::
+
+        user.password = make_password_hash(realm, username, password)
 
     :param realm: The realm.
     :param username: The username.
@@ -49,38 +54,28 @@ def calc_response(
     :param uri: The request URI.
     :param password_hash: The password hash for the HTTP digest authentication.
     :param nonce: The nonce.
-    :param qop: the quality of protection.
-    :param algorithm: The algorithm, either "MD5" or "MD5-sess".
+    :param qop: the quality of protection, either ``auth`` or ``auth-int``.
+    :param algorithm: The algorithm, either ``MD5`` or ``MD5-sess``.
     :param cnonce: The client nonce, which must exists when qop exists or
-        algorithm="MD5-sess".
+        algorithm is ``MD5-sess``.
     :param nc: The request counter, which must exists when qop exists.
-    :param body: The request body, which must exists when qop="auth-int".
+    :param body: The request body, which must exists when qop is ``auth-int``.
     :return: The response value.
-    :raise UnauthorizedException: When the cnonce is missing with the MD5-sess
-        algorithm, when the body is missing with the auth-int qop, or when the
-        cnonce or nc is missing with the auth or auth-int qop.
+    :raise AssertionError: When cnonce is missing with algorithm is
+        ``MD5-sess``, when body is missing with qop is ``auth-int``, or when
+        cnonce or nc is missing with qop exits.
     """
 
-    def validate_required(field: t.Optional[str], error: str) -> None:
-        """Validates a required field.
-
-        :param field: The field that is required.
-        :param error: The error message.
-        :return: None.
-        """
-        if field is None:
-            raise UnauthorizedException(error)
-
     def calc_ha1() -> str:
         """Calculates and returns the first hash.
 
         :return: The first hash.
-        :raise UnauthorizedException: When the cnonce is missing with the MD5-sess
-            algorithm.
+        :raise AssertionError: When cnonce is missing with
+            algorithm is ``MD5-sess``.
         """
         if algorithm == "MD5-sess":
-            validate_required(
-                cnonce, f"Missing \"cnonce\" with algorithm=\"{algorithm}\"")
+            assert cnonce is not None,\
+                f"Missing \"cnonce\" with algorithm=\"{algorithm}\""
             return md5(f"{password_hash}:{nonce}:{cnonce}".encode("utf8")) \
                 .hexdigest()
         # algorithm is None or algorithm == "MD5"
@@ -90,11 +85,10 @@ def calc_response(
         """Calculates the second hash.
 
         :return: The second hash.
-        :raise UnauthorizedException: When the body is missing with
-            qop="auth-int".
+        :raise AssertionError: When body is missing with qop is ``auth-int``.
         """
         if qop == "auth-int":
-            validate_required(body, f"Missing \"body\" with qop=\"{qop}\"")
+            assert body is not None, f"Missing \"body\" with qop=\"{qop}\""
             return md5(
                 f"{method}:{uri}:{md5(body).hexdigest()}".encode("utf8")) \
                 .hexdigest()
@@ -104,8 +98,8 @@ def calc_response(
     ha1: str = calc_ha1()
     ha2: str = calc_ha2()
     if qop == "auth" or qop == "auth-int":
-        validate_required(cnonce, f"Missing \"cnonce\" with the qop=\"{qop}\"")
-        validate_required(nc, f"Missing \"nc\" with the qop=\"{qop}\"")
+        assert cnonce is not None, f"Missing \"cnonce\" with the qop=\"{qop}\""
+        assert nc is not None, f"Missing \"nc\" with the qop=\"{qop}\""
         return md5(f"{ha1}:{nonce}:{nc}:{cnonce}:{qop}:{ha2}".encode("utf8"))\
             .hexdigest()
     # qop is None

src/flask_digest_auth/auth.py

@@ -31,51 +31,6 @@ from itsdangerous import URLSafeTimedSerializer, BadData
 from werkzeug.datastructures import Authorization
 
 from flask_digest_auth.algo import calc_response
-from flask_digest_auth.exception import UnauthorizedException
-
-
-class BasePasswordHashGetter:
-    """The base password hash getter."""
-
-    @staticmethod
-    def __call__(username: str) -> t.Optional[str]:
-        """Returns the password hash of a user.
-
-        :param username: The username.
-        :return: The password hash, or None if the user does not exist.
-        :raise UnboundLocalError: When the password hash getter function is
-            not registered yet.
-        """
-        raise UnboundLocalError("The function to return the password hash"
-                                " was not registered yet.")
-
-
-class BaseUserGetter:
-    """The base user getter."""
-
-    @staticmethod
-    def __call__(username: str) -> t.Optional[t.Any]:
-        """Returns a user.
-
-        :param username: The username.
-        :return: The user, or None if the user does not exist.
-        :raise UnboundLocalError: When the user getter function is not
-            registered yet.
-        """
-        raise UnboundLocalError("The function to return the user"
-                                " was not registered yet.")
-
-
-class BaseOnLogInCallback:
-    """The base callback when the user logs in."""
-
-    @staticmethod
-    def __call__(user: t.Any) -> None:
-        """Runs the callback when the user logs in.
-
-        :param user: The logged-in user.
-        :return: None.
-        """
 
 
 class DigestAuth:
@@ -103,7 +58,17 @@ class DigestAuth:
     def login_required(self, view) -> t.Callable:
         """The view decorator for HTTP digest authentication.
 
-        :param view:
+        For example:
+
+        ::
+
+            @auth.login_required
+            def admin():
+                return f"Hello, {g.user.username}!"
+
+        The logged-in user can be retrieved at ``g.user``.
+
+        :param view: The view.
         :return: The login-protected view.
         """
 
@@ -137,7 +102,7 @@ class DigestAuth:
             if authorization.type != "digest":
                 raise UnauthorizedException(
                     "Not an HTTP digest authorization")
-            self.authenticate(state)
+            self.__authenticate(state)
             session["user"] = authorization.username
             return self.__get_user(authorization.username)
 
@@ -166,12 +131,12 @@ class DigestAuth:
                 response: Response = Response()
                 response.status = 401
                 response.headers["WWW-Authenticate"] \
-                    = self.make_response_header(state)
+                    = self.__make_response_header(state)
                 abort(response)
 
         return login_required_view
 
-    def authenticate(self, state: AuthState) -> None:
+    def __authenticate(self, state: AuthState) -> None:
         """Authenticate a user.
 
         :param state: The authorization state.
@@ -216,11 +181,11 @@ class DigestAuth:
             state.stale = True
             raise UnauthorizedException("Invalid nonce")
 
-    def make_response_header(self, state: AuthState) -> str:
-        """Composes and returns the WWW-Authenticate response header.
+    def __make_response_header(self, state: AuthState) -> str:
+        """Composes and returns the ``WWW-Authenticate`` response header.
 
         :param state: The authorization state.
-        :return: The WWW-Authenticate response header.
+        :return: The ``WWW-Authenticate`` response header.
         """
 
         def get_opaque() -> t.Optional[str]:
@@ -257,7 +222,16 @@ class DigestAuth:
 
     def register_get_password(self, func: t.Callable[[str], t.Optional[str]])\
             -> None:
-        """Registers the callback to obtain the password hash.
+        """The decorator to register the callback to obtain the password hash.
+
+        For example:
+
+        ::
+
+            @auth.register_get_password
+            def get_password_hash(username: str) -> Optional[str]:
+                user = User.query.filter(User.username == username).first()
+                return None if user is None else user.password
 
         :param func: The callback that given the username, returns the password
             hash, or None if the user does not exist.
@@ -280,7 +254,15 @@ class DigestAuth:
 
     def register_get_user(self, func: t.Callable[[str], t.Optional[t.Any]])\
             -> None:
-        """Registers the callback to obtain the user.
+        """The decorator to register the callback to obtain the user.
+
+        For example:
+
+        ::
+
+            @auth.register_get_user
+            def get_user(username: str) -> Optional[User]:
+                return User.query.filter(User.username == username).first()
 
         :param func: The callback that given the username, returns the user,
             or None if the user does not exist.
@@ -302,7 +284,15 @@ class DigestAuth:
         self.__get_user = UserGetter()
 
     def register_on_login(self, func: t.Callable[[t.Any], None]) -> None:
-        """Registers the callback when the user logs in.
+        """The decorator to register the callback to run when the user logs in.
+
+        For example:
+
+        ::
+
+            @auth.register_on_login
+            def on_login(user: User) -> None:
+                user.visits = user.visits + 1
 
         :param func: The callback given the logged-in user.
         :return: None.
@@ -325,6 +315,15 @@ class DigestAuth:
     def init_app(self, app: Flask) -> None:
         """Initializes the Flask application.
 
+        For example:
+
+        ::
+
+            app: flask = Flask(__name__)
+            auth: DigestAuth = DigestAuth()
+            auth.realm = "My Admin"
+            auth.init_app(app)
+
         :param app: The Flask application.
         :return: None.
         """
@@ -345,7 +344,7 @@ class DigestAuth:
                 response: Response = Response()
                 response.status = 401
                 response.headers["WWW-Authenticate"] \
-                    = self.make_response_header(g.digest_auth_state)
+                    = self.__make_response_header(g.digest_auth_state)
                 abort(response)
 
             @login_manager.request_loader
@@ -364,7 +363,7 @@ class DigestAuth:
                     if authorization.type != "digest":
                         raise UnauthorizedException(
                             "Not an HTTP digest authorization")
-                    self.authenticate(g.digest_auth_state)
+                    self.__authenticate(g.digest_auth_state)
                     user = login_manager.user_callback(
                         authorization.username)
                     login_user(user)
@@ -380,6 +379,16 @@ class DigestAuth:
         This actually causes the next authentication to fail, which forces
         the browser to ask the user for the username and password again.
 
+        For example:
+
+        ::
+
+            @app.post("/logout")
+            @auth.login_required
+            def logout():
+                auth.logout()
+                return redirect(request.form.get("next"))
+
         :return: None.
         """
         if "user" in session:
@@ -400,3 +409,52 @@ class AuthState:
         """Constructs the authorization state."""
         self.opaque: t.Optional[str] = None
         self.stale: t.Optional[bool] = None
+
+
+class UnauthorizedException(Exception):
+    """The exception thrown when the authentication is failed."""
+    pass
+
+
+class BasePasswordHashGetter:
+    """The base password hash getter."""
+
+    @staticmethod
+    def __call__(username: str) -> t.Optional[str]:
+        """Returns the password hash of a user.
+
+        :param username: The username.
+        :return: The password hash, or None if the user does not exist.
+        :raise UnboundLocalError: When the password hash getter function is
+            not registered yet.
+        """
+        raise UnboundLocalError("The function to return the password hash"
+                                " was not registered yet.")
+
+
+class BaseUserGetter:
+    """The base user getter."""
+
+    @staticmethod
+    def __call__(username: str) -> t.Optional[t.Any]:
+        """Returns a user.
+
+        :param username: The username.
+        :return: The user, or None if the user does not exist.
+        :raise UnboundLocalError: When the user getter function is not
+            registered yet.
+        """
+        raise UnboundLocalError("The function to return the user"
+                                " was not registered yet.")
+
+
+class BaseOnLogInCallback:
+    """The base callback when the user logs in."""
+
+    @staticmethod
+    def __call__(user: t.Any) -> None:
+        """Runs the callback when the user logs in.
+
+        :param user: The logged-in user.
+        :return: None.
+        """

src/flask_digest_auth/exception.py

@@ -1,25 +0,0 @@
-# The Flask HTTP Digest Authentication Project.
-# Author: imacat@mail.imacat.idv.tw (imacat), 2022/11/3
-
-#  Copyright (c) 2022 imacat.
-#
-#  Licensed under the Apache License, Version 2.0 (the "License");
-#  you may not use this file except in compliance with the License.
-#  You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-#  distributed under the License is distributed on an "AS IS" BASIS,
-#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#  See the License for the specific language governing permissions and
-#  limitations under the License.
-
-"""The exception.
-
-"""
-
-
-class UnauthorizedException(Exception):
-    """The exception thrown when the authentication is failed."""
-    pass

src/flask_digest_auth/test.py

@@ -29,15 +29,62 @@ from flask_digest_auth.algo import calc_response, make_password_hash
 
 
 class Client(WerkzeugClient):
-    """The test client with HTTP digest authentication enabled."""
+    """The test client with HTTP digest authentication enabled.
+
+    For unittest example:
+
+    ::
+
+        class MyTestCase(flask_testing.TestCase):
+
+            def create_app(self):
+                app: Flask = create_app({
+                    "SECRET_KEY": token_urlsafe(32),
+                    "TESTING": True
+                })
+                app.test_client_class = Client
+                return app
+
+            def test_admin(self):
+                response = self.client.get("/admin")
+                self.assertEqual(response.status_code, 401)
+                response = self.client.get(
+                    "/admin", digest_auth=("my_name", "my_pass"))
+                self.assertEqual(response.status_code, 200)
+
+    For pytest example:
+
+    ::
+
+        @pytest.fixture()
+        def app():
+            app: Flask = create_app({
+                "SECRET_KEY": token_urlsafe(32),
+                "TESTING": True
+            })
+            app.test_client_class = Client
+            yield app
+
+        @pytest.fixture()
+        def client(app):
+            return app.test_client()
+
+        def test_admin(app: Flask, client: Client):
+            with app.app_context():
+                response = self.client.get("/admin")
+                assert response.status_code == 401
+                response = self.client.get(
+                    "/admin", digest_auth=("my_name", "my_pass"))
+                assert response.status_code == 200
+    """
 
     def open(self, *args, digest_auth: t.Optional[t.Tuple[str, str]] = None,
              **kwargs) -> TestResponse:
         """Opens a request.
 
         :param args: The arguments.
-        :param digest_auth: The username and password for the HTTP digest
-            authentication.
+        :param digest_auth: A tuple of the username and password for the HTTP
+            digest authentication.
         :param kwargs: The keyword arguments.
         :return: The response.
         """
@@ -59,7 +106,7 @@ class Client(WerkzeugClient):
                            username: str, password: str) -> Authorization:
         """Composes and returns the request authorization.
 
-        :param www_authenticate: The WWW-Authenticate response.
+        :param www_authenticate: The ``WWW-Authenticate`` response.
         :param uri: The request URI.
         :param username: The username.
         :param password: The password.