fine-tuning login
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README.md
23
README.md
@ -2,16 +2,6 @@
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Python Flask web application for capsul.org
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## postgres database schema management
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capsulflask has a concept of a schema version. When the application starts, it will query the database for a table named
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`schemaversion` that has one row and one column (`version`). If the `version` it finds is not equal to the `desiredSchemaVersion` variable set in `db.py`, it will run migration scripts from the `schema_migrations` folder one by one until the `schemaversion` table shows the correct version.
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For example, the script named `02_up_xyz.sql` should contain code that migrates the database from schema version 1 to schema version 2. Likewise, the script `02_down_xyz.sql` should contain code that migrates from schema version 2 back to schema version 1.
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**IMPORTANT: if you need to make changes to the schema, make a NEW schema version. DO NOT EDIT the existing schema versions.**
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In general, for safety, schema version upgrades should not delete data. Schema version downgrades will simply throw an error and exit for now.
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## how to run locally
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@ -33,7 +23,7 @@ pip install -r requirements.txt
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Run an instance of Postgres (I used docker for this, you can use whatever you want, point is its listening on localhost:5432)
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```
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docker run -it -e POSTGRES_PASSWORD=dev -p 5432:5432 postgres
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docker run --rm -it -e POSTGRES_PASSWORD=dev -p 5432:5432 postgres
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```
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Run the app
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@ -41,3 +31,14 @@ Run the app
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```
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FLASK_APP=capsulflask flask run
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```
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## postgres database schema management
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capsulflask has a concept of a schema version. When the application starts, it will query the database for a table named
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`schemaversion` that has one row and one column (`version`). If the `version` it finds is not equal to the `desiredSchemaVersion` variable set in `db.py`, it will run migration scripts from the `schema_migrations` folder one by one until the `schemaversion` table shows the correct version.
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For example, the script named `02_up_xyz.sql` should contain code that migrates the database from schema version 1 to schema version 2. Likewise, the script `02_down_xyz.sql` should contain code that migrates from schema version 2 back to schema version 1.
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**IMPORTANT: if you need to make changes to the schema, make a NEW schema version. DO NOT EDIT the existing schema versions.**
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In general, for safety, schema version upgrades should not delete data. Schema version downgrades will simply throw an error and exit for now.
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@ -18,7 +18,7 @@ from capsulflask.db import get_model
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bp = Blueprint("auth", __name__, url_prefix="/auth")
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def account_required(view):
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"""View decorator that redirects anonymous users to the login page."""
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"""View decorator that redirects non-logged-in users to the login page."""
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@functools.wraps(view)
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def wrapped_view(**kwargs):
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@ -36,31 +36,34 @@ def login():
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error = None
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if not email:
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error = "Email is required."
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error = "email is required"
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elif not re.match(r"(^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$)", email):
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error = "Enter a valid email address."
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error = "enter a valid email address"
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if error is None:
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token = get_model().login(email)
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if token is None:
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error = "too many logins. please use one of the existing login links that have been emailed to you"
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else:
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link = f"{current_app.config['BASE_URL']}/auth/magic/{token}"
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link = f"{current_app.config['BASE_URL']}/auth/magic/{token}"
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current_app.config["FLASK_MAIL_INSTANCE"].send(
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Message(
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"Click This Link to Login to Capsul",
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body=f"""
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Navigate to {link} to log into capsul.
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current_app.config["FLASK_MAIL_INSTANCE"].send(
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Message(
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"Click This Link to Login to Capsul",
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body=f"""
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Navigate to {link} to log into capsul.
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""",
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html=f"""
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Navigate to <a href="{link}">{link}</a> to log into capsul.
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""",
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sender=current_app.config['MAIL_DEFAULT_SENDER'],
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recipients=[email]
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If you didn't request this, ignore this message.
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""",
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html=f"""
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<p>Navigate to <a href="{link}">{link}</a> to log into capsul.</p>
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<p>If you didn't request this, ignore this message.</p>
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""",
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recipients=[email]
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)
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)
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)
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return render_template("check-your-email.html")
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return render_template("login-landing.html", email=email)
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flash(error)
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@ -12,6 +12,10 @@ class Model:
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if len(self.cursor.fetchall()) == 0:
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self.cursor.execute("INSERT INTO accounts (email) VALUES (%s)", (email, ))
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self.cursor.execute("SELECT token FROM logintokens WHERE email = %s", (email, ))
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if len(self.cursor.fetchall()) > 2:
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return None
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token = generate()
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self.cursor.execute("INSERT INTO logintokens (email, token) VALUES (%s, %s)", (email, token))
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self.connection.commit()
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@ -22,7 +26,8 @@ class Model:
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self.cursor.execute("SELECT email FROM logintokens WHERE token = %s", (token, ))
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rows = self.cursor.fetchall()
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if len(rows) > 0:
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self.cursor.execute("DELETE FROM logintokens WHERE token = %s", (token, ))
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email = rows[0][0]
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self.cursor.execute("DELETE FROM logintokens WHERE email = %s", (email, ))
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self.connection.commit()
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return rows[0][0]
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return email
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return None
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@ -15,7 +15,7 @@ CREATE TABLE vms (
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CREATE TABLE payments (
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email TEXT REFERENCES accounts(email) ON DELETE RESTRICT,
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created TIMESTAMP NOT NULL DEFAULT NOW(),
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dollars INTEGER NOT NULL,
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dollars NUMERIC(8, 2) NOT NULL,
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PRIMARY KEY (email, created)
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);
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@ -3,7 +3,7 @@
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<title>{% block title %}{% endblock %}</title>
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<title>{% block title %}{% endblock %}{% if self.title() %} - {% endif %}capsul</title>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="shortcut icon" href="/favicon.ico" />
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<link rel="apple-touch-icon" href="/icon.png" />
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@ -14,7 +14,7 @@
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<div class="float-right">
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{% if session["account"] %}
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<span>{{ session["account"] }}</span>
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<span>Logged in as {{ session["account"] }}</span>
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<a href="{{ url_for('auth.logout') }}">Log Out</a>
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{% else %}
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<a href="{{ url_for('auth.login') }}">Log In</a>
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@ -1,6 +0,0 @@
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{% extends 'base.html' %}
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{% block content %}
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Check Your Email My Dude
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{% endblock %}
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7
capsulflask/templates/login-landing.html
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7
capsulflask/templates/login-landing.html
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{% extends 'base.html' %}
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{% block title %}check your email{% endblock %}
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{% block content %}
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check your email. a login link has been sent to {{ email }}
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{% endblock %}
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@ -1,5 +1,6 @@
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{% extends 'base.html' %}
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{% block title %}login{% endblock %}
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{% block content %}
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<form method="post">
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