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app.py
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app.py
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import os
import re
from flask import Flask, flash, redirect, render_template, request, session, send_file, jsonify
from flask_session import Session
from werkzeug.security import check_password_hash, generate_password_hash
from auth_decorators import login_required
from image_service import upload_new_image, apply_image_process, get_image_paths, get_image_serve_path, delete_image
from user_service import register_user, login_user, get_user
# Configure application
app = Flask(__name__)
# Configure session to use filesystem (instead of signed cookies)
app.config["SESSION_PERMANENT"] = False
app.config["SESSION_TYPE"] = "filesystem"
Session(app)
@app.after_request
def after_request(response):
"""Ensure responses aren't cached"""
response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
response.headers["Expires"] = 0
response.headers["Pragma"] = "no-cache"
return response
@app.route("/")
def index():
user_info = None
if not session:
return redirect("/login")
user_id = session["user_id"]
user_info = get_user(user_id)
return render_template("index.html", user_info=user_info)
@app.route('/uploadImage', methods=['GET','POST'])
@login_required
def upload_image():
if request.method == "GET":
return render_template("upload_image.html")
if request.method == "POST":
user_id = session["user_id"]
# Check if the post request has the file part
if 'file' not in request.files:
return jsonify({'message': 'No file part in the request'}), 400
file = request.files['file']
# If the user does not select a file, the browser submits an
# empty file without a filename.
if not file or file.filename == '':
return jsonify({'message': 'No selected file'}), 400
try:
upload_new_image(file, user_id)
except RuntimeError as e:
return jsonify({'message': f"Error occurred: {e}"}), 400
return redirect("/images")
@app.route('/image/<filename>')
@login_required
def serve_image(filename):
user_id = session["user_id"]
if not filename.startswith(str(user_id)):
return jsonify({'message': "Permission Denined"}), 400
image_path = get_image_serve_path(filename)
mime_type = f"image/{filename.rsplit('.', 1)[1].lower()}"
return send_file(image_path, mimetype=mime_type)
@app.route('/processImage', methods=['POST'])
@login_required
def process_image():
if request.method == "POST":
user_id = session["user_id"]
filter_type = request.form["process_type"]
image_name = request.form["image_name"]
image = None
try:
image = apply_image_process(image_name, user_id, filter_type)
except:
return jsonify({'message': 'error applying filter'}), 400
# Return the image, set the correct MIME type
return send_file(image, mimetype='image/png')
@app.route('/removeImage', methods=['POST'])
@login_required
def remove_image():
if request.method == "POST":
user_id = session["user_id"]
image_name = request.form["image_name"]
try:
delete_image(image_name, user_id)
except:
return jsonify({'message': 'error removing image'}), 400
return jsonify({'message': 'iamge removed'}), 200
@app.route('/images', methods=['GET'])
@login_required
def images():
if request.method == "GET":
user_id = session["user_id"]
image_paths = get_image_paths(user_id)
return render_template("images.html", image_paths=image_paths)
@app.route("/login", methods=["GET", "POST"])
def login():
"""Log user in"""
# Forget any user_id
session.clear()
if request.method == "GET":
return render_template("login.html")
# User reached route via POST (as by submitting a form via POST)
if request.method == "POST":
username = request.form.get("username")
password = request.form.get("password")
if not username or not password:
return jsonify({'message': 'must provide username & password'}), 403
auth_user = login_user(username, password)
if auth_user is None:
return jsonify({'message': 'invalid username and/or password'}), 403
# Remember which user has logged in
session["user_id"] = auth_user["id"]
return jsonify({'message': 'success'}), 200
@app.route("/logout")
@login_required
def logout():
"""Log user out"""
# Forget any user_id
session.clear()
# Redirect user to login form
return redirect("/")
@app.route("/register", methods=["GET", "POST"])
def register():
"""Register user"""
if request.method == "GET":
return render_template("register.html")
if request.method == "POST":
username = request.form["username"]
password = request.form["password"]
if not username or not password:
return jsonify({'message': "Username & Password cannot be blank"}), 400
try:
register_user(username, password)
except RunTimeError as e:
return jsonify({'message': f"Error occurred: {e}"}), 400
return redirect("/")