added authentication

Author: ZeeshanML

.gitignore

@@ -1,10 +1,234 @@
-# Python-generated files
+# Created by https://www.toptal.com/developers/gitignore/api/python,macos,visualstudiocode,dotenv
+# Edit at https://www.toptal.com/developers/gitignore?templates=python,macos,visualstudiocode,dotenv
+
+### dotenv ###
+.env
+
+### Database Files ###
+*.sqlite3
+*.db
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### macOS Patch ###
+# iCloud generated files
+*.icloud
+
+### Python ###
+# Byte-compiled / optimized / DLL files
 __pycache__/
-*.py[oc]
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
 build/
+develop-eggs/
 dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
 wheels/
-*.egg-info
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
 
-# Virtual environments
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
 .venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+# End of https://www.toptal.com/developers/gitignore/api/python,macos,visualstudiocode,dotenv

auth.py

@@ -0,0 +1,52 @@
+from datetime import UTC, datetime, timedelta
+
+import jwt
+from fastapi.security import OAuth2PasswordBearer
+from pwdlib import PasswordHash
+
+from config import settings
+
+password_hash = PasswordHash.recommended()
+
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/users/token")
+
+
+def hash_password(password: str) -> str:
+    return password_hash.hash(password)
+
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    return password_hash.verify(plain_password, hashed_password)
+
+
+def create_access_token(data: dict, expires_delta: timedelta | None = None) -> str:
+    """Create a JWT access token."""
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.now(UTC) + expires_delta
+    else:
+        expire = datetime.now(UTC) + timedelta(
+            minutes=settings.access_token_expire_minutes,
+        )
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(
+        to_encode,
+        settings.secret_key.get_secret_value(),
+        algorithm=settings.algorithm,
+    )
+    return encoded_jwt
+
+
+def verify_access_token(token: str) -> str | None:
+    """Verify a JWT access token and return the subject (user id) if valid."""
+    try:
+        payload = jwt.decode(
+            token,
+            settings.secret_key.get_secret_value(),
+            algorithms=[settings.algorithm],
+            options={"require": ["exp", "sub"]},
+        )
+    except jwt.InvalidTokenError:
+        return None
+    else:
+        return payload.get("sub")

blog.db

@@ -0,0 +1,15 @@
+from pydantic import SecretStr
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8"
+    )
+
+    secret_key: SecretStr
+    algorithm: str = "HS256"
+    access_token_expire_minutes: int = 30
+
+
+settings = Settings() # Loaded from .env file

config.py

@@ -106,6 +106,24 @@ async def user_posts_page(
     )
 
 
+@app.get("/login", include_in_schema=False)
+async def login_page(request: Request):
+    return templates.TemplateResponse(
+        request,
+        "login.html",
+        {"title": "Login"},
+    )
+
+
+@app.get("/register", include_in_schema=False)
+async def register_page(request: Request):
+    return templates.TemplateResponse(
+        request,
+        "register.html",
+        {"title": "Register"},
+    )
+
+
 @app.exception_handler(StarletteHTTPException)
 async def general_http_exception_handler(
     request: Request,

main.py

@@ -14,6 +14,7 @@ class User(Base):
     id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
     username: Mapped[str] = mapped_column(String(50), unique=True, nullable=False)
     email: Mapped[str] = mapped_column(String(120), unique=True, nullable=False)
+    password_hash: Mapped[str] = mapped_column(String(200), nullable=False)
     image_file: Mapped[str | None] = mapped_column(
         String(200),
         nullable=True,

models.py

@@ -8,5 +8,8 @@ dependencies = [
     "aiosqlite>=0.22.1",
     "fastapi[standard]>=0.128.1",
     "greenlet>=3.3.1",
+    "pwdlib[argon2]>=0.3.0",
+    "pydantic-settings>=2.12.0",
+    "pyjwt>=2.11.0",
     "sqlalchemy>=2.0.46",
 ]