First run at the keycloak login

keycloak_collective_portal.py

@@ -1,27 +1,60 @@
 """Community Keycloak SSO user management."""
 
+from os import environ
+
+from authlib.integrations.starlette_client import OAuth, OAuthError
 from fastapi import FastAPI, Request
 from fastapi.responses import HTMLResponse, RedirectResponse
 from fastapi.templating import Jinja2Templates
 from starlette.middleware.sessions import SessionMiddleware
 
+APP_SECRET_KEY = environ.get("APP_SECRET_KEY")
+KEYCLOAK_CLIENT_ID = environ.get("KEYCLOAK_CLIENT_ID")
+KEYCLOAK_CLIENT_SECRET = environ.get("KEYCLOAK_CLIENT_SECRET")
+KEYCLOAK_DOMAIN = environ.get("KEYCLOAK_DOMAIN")
+
 app = FastAPI()
-app.add_middleware(SessionMiddleware, secret_key="mysecretzkey")
+app.add_middleware(SessionMiddleware, secret_key=APP_SECRET_KEY)
 templates = Jinja2Templates(directory="templates")
 
+oauth = OAuth()
+oauth.register(
+    name="keycloak",
+    client_kwargs={"scope": "openid profile email"},
+    client_id=KEYCLOAK_CLIENT_ID,
+    client_secret=KEYCLOAK_CLIENT_SECRET,
+    server_metadata_url=f"https://{environ.get('KEYCLOAK_DOMAIN')}/.well-known/openid-configuration",  # noqa
+)
+
 
 @app.get("/", response_class=HTMLResponse)
 async def home(request: Request):
     user = request.session.get("user")
     if user:
         return templates.TemplateResponse(
-            "index.html", context={"request": request}
+            "index.html", context={"request": request, "user": user}
         )
-    return RedirectResponse("/login")
+    return RedirectResponse(request.url_for("login_keycloak"))
 
 
-@app.get("/login", response_class=HTMLResponse)
-async def login(request: Request):
-    return templates.TemplateResponse(
-        "login.html", context={"request": request}
-    )
+@app.get("/login/keycloak")
+async def login_keycloak(request: Request):
+    redirect_uri = request.url_for("auth")
+    return await oauth.keycloak.authorize_redirect(request, redirect_uri)
+
+
+@app.get("/auth")
+async def auth(request: Request):
+    try:
+        token = await oauth.keycloak.authorize_access_token(request)
+    except OAuthError as error:
+        return HTMLResponse(f"<h1>{error.error}</h1>")
+    user = await oauth.keycloak.parse_id_token(request, token)
+    request.session["user"] = dict(user)
+    return RedirectResponse(request.url_for("home"))
+
+
+@app.route("/logout")
+async def logout(request: Request):
+    request.session.pop("user", None)
+    return RedirectResponse(request.url_for("home"))

poetry.lock

@@ -1,3 +1,20 @@
+[[package]]
+name = "anyio"
+version = "3.1.0"
+description = "High level compatibility layer for multiple asynchronous event loop implementations"
+category = "main"
+optional = false
+python-versions = ">=3.6.2"
+
+[package.dependencies]
+idna = ">=2.8"
+sniffio = ">=1.1"
+
+[package.extras]
+doc = ["sphinx-rtd-theme", "sphinx-autodoc-typehints (>=1.2.0)"]
+test = ["coverage[toml] (>=4.5)", "hypothesis (>=4.0)", "pytest (>=6.0)", "pytest-mock (>=3.6.1)", "trustme", "uvloop (<0.15)", "mock (>=4)", "uvloop (>=0.15)"]
+trio = ["trio (>=0.16)"]
+
 [[package]]
 name = "appdirs"
 version = "1.4.4"
@@ -17,6 +34,20 @@ python-versions = ">=3.6"
 [package.extras]
 tests = ["pytest", "pytest-asyncio", "mypy (>=0.800)"]
 
+[[package]]
+name = "authlib"
+version = "0.15.4"
+description = "The ultimate Python library in building OAuth and OpenID Connect servers."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+cryptography = "*"
+
+[package.extras]
+client = ["requests"]
+
 [[package]]
 name = "black"
 version = "21.6b0"
@@ -39,6 +70,25 @@ d = ["aiohttp (>=3.6.0)", "aiohttp-cors (>=0.4.0)"]
 python2 = ["typed-ast (>=1.4.2)"]
 uvloop = ["uvloop (>=0.15.2)"]
 
+[[package]]
+name = "certifi"
+version = "2021.5.30"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "cffi"
+version = "1.14.5"
+description = "Foreign Function Interface for Python calling C code."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+pycparser = "*"
+
 [[package]]
 name = "click"
 version = "8.0.1"
@@ -58,6 +108,25 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package]]
+name = "cryptography"
+version = "3.4.7"
+description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+cffi = ">=1.12"
+
+[package.extras]
+docs = ["sphinx (>=1.6.5,!=1.8.0,!=3.1.0,!=3.1.1)", "sphinx-rtd-theme"]
+docstest = ["doc8", "pyenchant (>=1.6.11)", "twine (>=1.12.0)", "sphinxcontrib-spelling (>=4.0.1)"]
+pep8test = ["black", "flake8", "flake8-import-order", "pep8-naming"]
+sdist = ["setuptools-rust (>=0.11.4)"]
+ssh = ["bcrypt (>=3.1.5)"]
+test = ["pytest (>=6.0)", "pytest-cov", "pytest-subtests", "pytest-xdist", "pretend", "iso8601", "pytz", "hypothesis (>=1.11.4,!=3.79.2)"]
+
 [[package]]
 name = "fastapi"
 version = "0.65.2"
@@ -97,6 +166,22 @@ category = "main"
 optional = false
 python-versions = ">=3.6"
 
+[[package]]
+name = "httpcore"
+version = "0.13.4"
+description = "A minimal low-level HTTP client."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+anyio = ">=3.0.0,<4.0.0"
+h11 = ">=0.11,<0.13"
+sniffio = ">=1.0.0,<2.0.0"
+
+[package.extras]
+http2 = ["h2 (>=3,<5)"]
+
 [[package]]
 name = "httptools"
 version = "0.2.0"
@@ -108,6 +193,32 @@ python-versions = "*"
 [package.extras]
 test = ["Cython (==0.29.22)"]
 
+[[package]]
+name = "httpx"
+version = "0.18.1"
+description = "The next generation HTTP client."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+certifi = "*"
+httpcore = ">=0.13.0,<0.14.0"
+rfc3986 = {version = ">=1.3,<2", extras = ["idna2008"]}
+sniffio = "*"
+
+[package.extras]
+brotli = ["brotlicffi (>=1.0.0,<2.0.0)"]
+http2 = ["h2 (>=3.0.0,<4.0.0)"]
+
+[[package]]
+name = "idna"
+version = "3.2"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
 [[package]]
 name = "isort"
 version = "5.8.0"
@@ -200,6 +311,14 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package]]
+name = "pycparser"
+version = "2.20"
+description = "C parser in Python"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
 [[package]]
 name = "pydantic"
 version = "1.8.2"
@@ -250,6 +369,28 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "rfc3986"
+version = "1.5.0"
+description = "Validating URI References per RFC 3986"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+idna = {version = "*", optional = true, markers = "extra == \"idna2008\""}
+
+[package.extras]
+idna2008 = ["idna"]
+
+[[package]]
+name = "sniffio"
+version = "1.2.0"
+description = "Sniff out which async library your code is running under"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
 [[package]]
 name = "starlette"
 version = "0.14.2"
@@ -332,9 +473,13 @@ python-versions = ">=3.6.1"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "a3278c69c36a0390a247780ff0ad55c878d2e1ea028097bd46d8998d1c449ce1"
+content-hash = "5c484b3f866449256a1928794c2787de8672804952c7887f059cb944beecdaf1"
 
 [metadata.files]
+anyio = [
+    {file = "anyio-3.1.0-py3-none-any.whl", hash = "sha256:5e335cef65fbd1a422bbfbb4722e8e9a9fadbd8c06d5afe9cd614d12023f6e5a"},
+    {file = "anyio-3.1.0.tar.gz", hash = "sha256:43e20711a9d003d858d694c12356dc44ab82c03ccc5290313c3392fa349dad0e"},
+]
 appdirs = [
     {file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
     {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
@@ -343,10 +488,69 @@ asgiref = [
     {file = "asgiref-3.3.4-py3-none-any.whl", hash = "sha256:92906c611ce6c967347bbfea733f13d6313901d54dcca88195eaeb52b2a8e8ee"},
     {file = "asgiref-3.3.4.tar.gz", hash = "sha256:d1216dfbdfb63826470995d31caed36225dcaf34f182e0fa257a4dd9e86f1b78"},
 ]
+authlib = [
+    {file = "Authlib-0.15.4-py2.py3-none-any.whl", hash = "sha256:d9fe5edb59801b16583faa86f88d798d99d952979b9616d5c735b9170b41ae2c"},
+    {file = "Authlib-0.15.4.tar.gz", hash = "sha256:37df3a2554bc6fe0da3cc6848c44fac2ae40634a7f8fc72543947f4330b26464"},
+]
 black = [
     {file = "black-21.6b0-py3-none-any.whl", hash = "sha256:dfb8c5a069012b2ab1e972e7b908f5fb42b6bbabcba0a788b86dc05067c7d9c7"},
     {file = "black-21.6b0.tar.gz", hash = "sha256:dc132348a88d103016726fe360cb9ede02cecf99b76e3660ce6c596be132ce04"},
 ]
+certifi = [
+    {file = "certifi-2021.5.30-py2.py3-none-any.whl", hash = "sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8"},
+    {file = "certifi-2021.5.30.tar.gz", hash = "sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee"},
+]
+cffi = [
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+    {file = "cffi-1.14.5-cp39-cp39-win_amd64.whl", hash = "sha256:f2d45f97ab6bb54753eab54fffe75aaf3de4ff2341c9daee1987ee1837636f1d"},
+    {file = "cffi-1.14.5.tar.gz", hash = "sha256:fd78e5fee591709f32ef6edb9a015b4aa1a5022598e36227500c8f4e02328d9c"},
+]
 click = [
     {file = "click-8.0.1-py3-none-any.whl", hash = "sha256:fba402a4a47334742d782209a7c79bc448911afe1149d07bdabdf480b3e2f4b6"},
     {file = "click-8.0.1.tar.gz", hash = "sha256:8c04c11192119b1ef78ea049e0a6f0463e4c48ef00a30160c704337586f3ad7a"},
@@ -355,6 +559,20 @@ colorama = [
     {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
     {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
 ]
+cryptography = [
+    {file = "cryptography-3.4.7-cp36-abi3-macosx_10_10_x86_64.whl", hash = "sha256:3d8427734c781ea5f1b41d6589c293089704d4759e34597dce91014ac125aad1"},
+    {file = "cryptography-3.4.7-cp36-abi3-macosx_11_0_arm64.whl", hash = "sha256:8e56e16617872b0957d1c9742a3f94b43533447fd78321514abbe7db216aa250"},
+    {file = "cryptography-3.4.7-cp36-abi3-manylinux2010_x86_64.whl", hash = "sha256:37340614f8a5d2fb9aeea67fd159bfe4f5f4ed535b1090ce8ec428b2f15a11f2"},
+    {file = "cryptography-3.4.7-cp36-abi3-manylinux2014_aarch64.whl", hash = "sha256:240f5c21aef0b73f40bb9f78d2caff73186700bf1bc6b94285699aff98cc16c6"},
+    {file = "cryptography-3.4.7-cp36-abi3-manylinux2014_x86_64.whl", hash = "sha256:1e056c28420c072c5e3cb36e2b23ee55e260cb04eee08f702e0edfec3fb51959"},
+    {file = "cryptography-3.4.7-cp36-abi3-win32.whl", hash = "sha256:0f1212a66329c80d68aeeb39b8a16d54ef57071bf22ff4e521657b27372e327d"},
+    {file = "cryptography-3.4.7-cp36-abi3-win_amd64.whl", hash = "sha256:de4e5f7f68220d92b7637fc99847475b59154b7a1b3868fb7385337af54ac9ca"},
+    {file = "cryptography-3.4.7-pp36-pypy36_pp73-manylinux2010_x86_64.whl", hash = "sha256:26965837447f9c82f1855e0bc8bc4fb910240b6e0d16a664bb722df3b5b06873"},
+    {file = "cryptography-3.4.7-pp36-pypy36_pp73-manylinux2014_x86_64.whl", hash = "sha256:eb8cc2afe8b05acbd84a43905832ec78e7b3873fb124ca190f574dca7389a87d"},
+    {file = "cryptography-3.4.7-pp37-pypy37_pp73-manylinux2010_x86_64.whl", hash = "sha256:7ec5d3b029f5fa2b179325908b9cd93db28ab7b85bb6c1db56b10e0b54235177"},
+    {file = "cryptography-3.4.7-pp37-pypy37_pp73-manylinux2014_x86_64.whl", hash = "sha256:ee77aa129f481be46f8d92a1a7db57269a2f23052d5f2433b4621bb457081cc9"},
+    {file = "cryptography-3.4.7.tar.gz", hash = "sha256:3d10de8116d25649631977cb37da6cbdd2d6fa0e0281d014a5b7d337255ca713"},
+]
 fastapi = [
     {file = "fastapi-0.65.2-py3-none-any.whl", hash = "sha256:39569a18914075b2f1aaa03bcb9dc96a38e0e5dabaf3972e088c9077dfffa379"},
     {file = "fastapi-0.65.2.tar.gz", hash = "sha256:8359e55d8412a5571c0736013d90af235d6949ec4ce978e9b63500c8f4b6f714"},
@@ -367,6 +585,10 @@ h11 = [
     {file = "h11-0.12.0-py3-none-any.whl", hash = "sha256:36a3cb8c0a032f56e2da7084577878a035d3b61d104230d4bd49c0c6b555a9c6"},
     {file = "h11-0.12.0.tar.gz", hash = "sha256:47222cb6067e4a307d535814917cd98fd0a57b6788ce715755fa2b6c28b56042"},
 ]
+httpcore = [
+    {file = "httpcore-0.13.4-py3-none-any.whl", hash = "sha256:38e09649bb3906c913a2917c4eb3e3b3e11c83d4edebad8b53b7d757abc49267"},
+    {file = "httpcore-0.13.4.tar.gz", hash = "sha256:9fa4c623bb9d2280c009c34658cc6315e4fd425a395145645bee205d827263e4"},
+]
 httptools = [
     {file = "httptools-0.2.0-cp35-cp35m-macosx_10_14_x86_64.whl", hash = "sha256:79dbc21f3612a78b28384e989b21872e2e3cf3968532601544696e4ed0007ce5"},
     {file = "httptools-0.2.0-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:78d03dd39b09c99ec917d50189e6743adbfd18c15d5944392d2eabda688bf149"},
@@ -384,6 +606,14 @@ httptools = [
     {file = "httptools-0.2.0-cp39-cp39-win_amd64.whl", hash = "sha256:200fc1cdf733a9ff554c0bb97a4047785cfaad9875307d6087001db3eb2b417f"},
     {file = "httptools-0.2.0.tar.gz", hash = "sha256:94505026be56652d7a530ab03d89474dc6021019d6b8682281977163b3471ea0"},
 ]
+httpx = [
+    {file = "httpx-0.18.1-py3-none-any.whl", hash = "sha256:ad2e3db847be736edc4b272c4d5788790a7e5789ef132fc6b5fef8aeb9e9f6e0"},
+    {file = "httpx-0.18.1.tar.gz", hash = "sha256:0a2651dd2b9d7662c70d12ada5c290abcf57373b9633515fe4baa9f62566086f"},
+]
+idna = [
+    {file = "idna-3.2-py3-none-any.whl", hash = "sha256:14475042e284991034cb48e06f6851428fb14c4dc953acd9be9a5e95c7b6dd7a"},
+    {file = "idna-3.2.tar.gz", hash = "sha256:467fbad99067910785144ce333826c71fb0e63a425657295239737f7ecd125f3"},
+]
 isort = [
     {file = "isort-5.8.0-py3-none-any.whl", hash = "sha256:2bb1680aad211e3c9944dbce1d4ba09a989f04e238296c87fe2139faa26d655d"},
     {file = "isort-5.8.0.tar.gz", hash = "sha256:0a943902919f65c5684ac4e0154b1ad4fac6dcaa5d9f3426b732f1c8b5419be6"},
@@ -473,6 +703,10 @@ pycodestyle = [
     {file = "pycodestyle-2.7.0-py2.py3-none-any.whl", hash = "sha256:514f76d918fcc0b55c6680472f0a37970994e07bbb80725808c17089be302068"},
     {file = "pycodestyle-2.7.0.tar.gz", hash = "sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef"},
 ]
+pycparser = [
+    {file = "pycparser-2.20-py2.py3-none-any.whl", hash = "sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705"},
+    {file = "pycparser-2.20.tar.gz", hash = "sha256:2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0"},
+]
 pydantic = [
     {file = "pydantic-1.8.2-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:05ddfd37c1720c392f4e0d43c484217b7521558302e7069ce8d318438d297739"},
     {file = "pydantic-1.8.2-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:a7c6002203fe2c5a1b5cbb141bb85060cbff88c2d78eccbc72d97eb7022c43e4"},
@@ -579,6 +813,14 @@ regex = [
     {file = "regex-2021.4.4-cp39-cp39-win_amd64.whl", hash = "sha256:97f29f57d5b84e73fbaf99ab3e26134e6687348e95ef6b48cfd2c06807005a07"},
     {file = "regex-2021.4.4.tar.gz", hash = "sha256:52ba3d3f9b942c49d7e4bc105bb28551c44065f139a65062ab7912bef10c9afb"},
 ]
+rfc3986 = [
+    {file = "rfc3986-1.5.0-py2.py3-none-any.whl", hash = "sha256:a86d6e1f5b1dc238b218b012df0aa79409667bb209e58da56d0b94704e712a97"},
+    {file = "rfc3986-1.5.0.tar.gz", hash = "sha256:270aaf10d87d0d4e095063c65bf3ddbc6ee3d0b226328ce21e036f946e421835"},
+]
+sniffio = [
+    {file = "sniffio-1.2.0-py3-none-any.whl", hash = "sha256:471b71698eac1c2112a40ce2752bb2f4a4814c22a54a3eed3676bc0f5ca9f663"},
+    {file = "sniffio-1.2.0.tar.gz", hash = "sha256:c4666eecec1d3f50960c6bdf61ab7bc350648da6c126e3cf6898d8cd4ddcd3de"},
+]
 starlette = [
     {file = "starlette-0.14.2-py3-none-any.whl", hash = "sha256:3c8e48e52736b3161e34c9f0e8153b4f32ec5d8995a3ee1d59410d92f75162ed"},
     {file = "starlette-0.14.2.tar.gz", hash = "sha256:7d49f4a27f8742262ef1470608c59ddbc66baf37c148e938c7038e6bc7a998aa"},

pyproject.toml

@@ -11,6 +11,8 @@ fastapi = "^0.65.2"
 uvicorn = {extras = ["standard"], version = "^0.14.0"}
 Jinja2 = "^3.0.1"
 itsdangerous = "^2.0.1"
+Authlib = "^0.15.4"
+httpx = "^0.18.1"
 
 [tool.poetry.dev-dependencies]
 black = "^21.6b0"

templates/index.html

@@ -3,6 +3,6 @@
     <title>Home</title>
   </head>
   <body>
-    <p>Hello, World</p>
+    <p>Hello, {{ user }}</p>
   </body>
 </html>