Add OAuth refresh token support

alembic/versions/2022_12_18_1126-a209f0333f5a_add_oauth_refresh_token_support.py

@@ -0,0 +1,36 @@
+"""Add OAuth refresh token support
+
+Revision ID: a209f0333f5a
+Revises: 4ab54becec04
+Create Date: 2022-12-18 11:26:31.976348+00:00
+
+"""
+import sqlalchemy as sa
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = 'a209f0333f5a'
+down_revision = '4ab54becec04'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('indieauth_access_token', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('refresh_token', sa.String(), nullable=True))
+        batch_op.add_column(sa.Column('was_refreshed', sa.Boolean(), server_default='0', nullable=False))
+        batch_op.create_index(batch_op.f('ix_indieauth_access_token_refresh_token'), ['refresh_token'], unique=True)
+
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('indieauth_access_token', schema=None) as batch_op:
+        batch_op.drop_index(batch_op.f('ix_indieauth_access_token_refresh_token'))
+        batch_op.drop_column('was_refreshed')
+        batch_op.drop_column('refresh_token')
+
+    # ### end Alembic commands ###

app/indieauth.py

@@ -270,17 +270,17 @@ async def indieauth_token_endpoint(
     form_data = await request.form()
     logger.info(f"{form_data=}")
     grant_type = form_data.get("grant_type", "authorization_code")
-    if grant_type != "authorization_code":
+    if grant_type not in ["authorization_code", "refresh_token"]:
         raise ValueError(f"Invalid grant_type {grant_type}")
 
-    code = form_data["code"]
-
     # These must match the params from the first request
     client_id = form_data["client_id"]
-    redirect_uri = form_data["redirect_uri"]
-    # code_verifier is optional for backward compat
     code_verifier = form_data.get("code_verifier")
 
+    if grant_type == "authorization_code":
+        code = form_data["code"]
+        redirect_uri = form_data["redirect_uri"]
+        # code_verifier is optional for backward compat
         is_code_valid, auth_code_request = await _check_auth_code(
             db_session,
             code=code,
@@ -294,12 +294,38 @@ async def indieauth_token_endpoint(
                 status_code=400,
             )
 
+    elif grant_type == "refresh_token":
+        refresh_token = form_data["refresh_token"]
+        access_token = (
+            await db_session.scalars(
+                select(models.IndieAuthAccessToken)
+                .where(
+                    models.IndieAuthAccessToken.refresh_token == refresh_token,
+                    models.IndieAuthAccessToken.was_refreshed.is_(False),
+                )
+                .options(
+                    joinedload(
+                        models.IndieAuthAccessToken.indieauth_authorization_request
+                    )
+                )
+            )
+        ).one_or_none()
+        if not access_token:
+            raise ValueError("invalid refresh token")
+
+        if access_token.indieauth_authorization_request.client_id != client_id:
+            raise ValueError("invalid client ID")
+
+        auth_code_request = access_token.indieauth_authorization_request
+        access_token.was_refreshed = True
+
     if not auth_code_request:
         raise ValueError("Should never happen")
 
     access_token = models.IndieAuthAccessToken(
         indieauth_authorization_request_id=auth_code_request.id,
         access_token=secrets.token_urlsafe(32),
+        refresh_token=secrets.token_urlsafe(32),
         expires_in=3600,
         scope=auth_code_request.scope,
     )
@@ -309,6 +335,7 @@ async def indieauth_token_endpoint(
     return JSONResponse(
         content={
             "access_token": access_token.access_token,
+            "refresh_token": access_token.refresh_token,
             "token_type": "Bearer",
             "scope": auth_code_request.scope,
             "me": config.ID + "/",

app/main.py

@@ -631,6 +631,19 @@ async def outbox(
     )
 
 
+@app.post("/outbox")
+async def post_inbox(
+    request: Request,
+    db_session: AsyncSession = Depends(get_db_session),
+    access_token_info: indieauth.AccessTokenInfo = Depends(
+        indieauth.enforce_access_token
+    ),
+) -> ActivityPubResponse:
+    payload = await request.json()
+    logger.info(f"{payload=}")
+    raise ValueError("TODO")
+
+
 @app.get("/featured")
 async def featured(
     db_session: AsyncSession = Depends(get_db_session),
@@ -1055,7 +1068,6 @@ async def get_inbox(
     page: bool | None = None,
     next_cursor: str | None = None,
 ) -> ActivityPubResponse:
-    logger.info(f"{page=}/{next_cursor=}")
     where = [
         models.InboxObject.ap_type.in_(
             ["Create", "Follow", "Like", "Announce", "Undo", "Update"]

app/models.py

@@ -471,9 +471,11 @@ class IndieAuthAccessToken(Base):
     )
 
     access_token = Column(String, nullable=False, unique=True, index=True)
+    refresh_token = Column(String, nullable=True, unique=True, index=True)
     expires_in = Column(Integer, nullable=False)
     scope = Column(String, nullable=False)
     is_revoked = Column(Boolean, nullable=False, default=False)
+    was_refreshed = Column(Boolean, nullable=False, default=False, server_default="0")
 
 
 class OAuthClient(Base):