Add app folder .py , .txt and Dockerfile
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z1/app/Dockerfile
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FROM python:3.9-slim
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# Set the working directory
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WORKDIR /app
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# Copy the requirements file and install Python dependencies
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COPY requirements.txt .
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RUN pip install --no-cache-dir -r requirements.txt
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# Copy the application source code
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COPY app.py .
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# Expose port 5000 for the Flask application
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EXPOSE 5000
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# Start the Flask application
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CMD ["python", "app.py"]
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149
z1/app/app.py
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z1/app/app.py
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from flask import Flask, request, render_template_string, redirect, url_for
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import os
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import psycopg2
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app = Flask(__name__)
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# Retrieve database connection settings
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db_host = os.environ.get("DB_HOST", "postgres_db")
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db_name = os.environ.get("POSTGRES_DB", "contacts_db")
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db_user = os.environ.get("POSTGRES_USER", "user")
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db_password = os.environ.get("POSTGRES_PASSWORD", "password")
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# Function to make connection to database
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def get_db_connection():
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conn = psycopg2.connect(
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host=db_host,
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database=db_name,
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user=db_user,
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password=db_password
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)
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return conn
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# Init database & create contacts table if doesn't exist
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def init_db():
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conn = get_db_connection()
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cur = conn.cursor()
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cur.execute("""
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CREATE TABLE IF NOT EXISTS contacts (
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id SERIAL PRIMARY KEY,
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name VARCHAR(255) NOT NULL,
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email VARCHAR(255) NOT NULL,
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phone VARCHAR(20) NOT NULL
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);
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""")
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conn.commit()
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cur.close()
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conn.close()
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@app.route("/", methods=["GET", "POST"])
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def index():
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if request.method == "POST":
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name = request.form["name"]
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email = request.form["email"]
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phone = request.form["phone"]
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# Add new contact at the database
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conn = get_db_connection()
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cur = conn.cursor()
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cur.execute("INSERT INTO contacts (name, email, phone) VALUES (%s, %s, %s)",
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(name, email, phone))
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conn.commit()
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cur.close()
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conn.close()
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# Show all contacts
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conn = get_db_connection()
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cur = conn.cursor()
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cur.execute("SELECT * FROM contacts")
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contacts = cur.fetchall()
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cur.close()
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conn.close()
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return render_template_string("""
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<html>
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<head><title>Contact Directory</title></head>
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<body>
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<h1>Contact Directory</h1>
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<form method="post">
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<input type="text" name="name" placeholder="Name" required>
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<input type="email" name="email" placeholder="Email" required>
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<input type="text" name="phone" placeholder="Phone">
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<button type="submit">Add Contact</button>
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</form>
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<h2>Contacts</h2>
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<ul>
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{% for contact in contacts %}
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<li>
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{{ contact[1] }} - {{ contact[2] }} - {{ contact[3] }}
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<a href="{{ url_for('remove_contact', contact_id=contact[0]) }}">Delete</a>
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<a href="{{ url_for('change_contact', contact_id=contact[0]) }}">Edit</a>
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</li>
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{% endfor %}
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</ul>
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</body>
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</html>
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""", contacts=contacts)
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# How can you delete one contact ?
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@app.route("/remove/<int:contact_id>")
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def remove_contact(contact_id):
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conn = get_db_connection()
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cur = conn.cursor()
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cur.execute("DELETE FROM contacts WHERE id = %s", (contact_id,))
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conn.commit()
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cur.close()
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conn.close()
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return redirect(url_for('index'))
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@app.route("/change/<int:contact_id>", methods=["GET", "POST"])
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def change_contact(contact_id):
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if request.method == "POST":
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name = request.form["name"]
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email = request.form["email"]
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phone = request.form["phone"]
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conn = get_db_connection()
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cur = conn.cursor()
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cur.execute("UPDATE contacts SET name = %s, email = %s, phone = %s WHERE id = %s;", (name,email,phone, contact_id))
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conn.commit()
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cur.close()
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conn.close()
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return redirect(url_for('index'))
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# Show edit for contact
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conn = get_db_connection()
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cur = conn.cursor()
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cur.execute("SELECT * FROM contacts WHERE id = %s", (contact_id,))
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contact = cur.fetchone()
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cur.close()
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conn.close()
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return render_template_string("""
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<html>
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<head><title>Edit Contact</title></head>
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<body>
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<h1>Edit Contact</h1>
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<form method="POST">
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<ul>
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<li>
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<label for="name">New Name</label>
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<input type="name" name="name" value="{{ contact[1] }}" required></li>
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<li>
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<label for="email">New Email</label>
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<input type="email" name="email" value="{{ contact[2] }}" required></li>
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<li>
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<label for="phone">New Phone</label>
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<input type="phone" name="phone" value="{{ contact[3] }}" required></li>
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<button type="submit">Update Contact</button>
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</form>
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<a href="{{ url_for('index') }}">Back to Contacts</a>
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</body>
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</html>
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""", contact=contact)
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if __name__ == "__main__":
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init_db() # Initialiser la base de données et la table
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app.run(host='0.0.0.0', port=5000)
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3
z1/app/requirements.txt
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3
z1/app/requirements.txt
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@ -0,0 +1,3 @@
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Flask
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psycopg2-binary
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