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Python

"""
Flask Documentation: http://flask.pocoo.org/docs/
Jinja2 Documentation: http://jinja.pocoo.org/2/documentation/
Werkzeug Documentation: http://werkzeug.pocoo.org/documentation/
This file creates your application.
"""
from app import app, db
from flask import Flask, render_template, request, redirect, url_for, flash, send_from_directory, jsonify, abort
from app.forms import UserForm
from app.models import Book, BookSchema
import os
from werkzeug.utils import secure_filename
# import sqlite3
ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif'])
book_schema = BookSchema()
books_schema = BookSchema(many=True)
def allowed_file(filename):
return '.' in filename and \
filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
###
# Routing for your application.
###
@app.route('/')
def home():
"""Render website's home page."""
return render_template('home.html')
@app.route('/about/')
def about():
"""Render the website's about page."""
return render_template('about.html', name="Mary Jane")
@app.route('/uploads/<filename>')
def uploaded_file(filename):
return send_from_directory(app.config['UPLOAD_FOLDER'],
filename)
@app.route('/books')
def show_books():
books = db.session.query(Book).all() # or you could have used User.query.all()
return render_template('show_books.html', books=books)
@app.route('/books/<int:id>')
def show_book_by_id(id):
book = Book.query.get(id)
if not book:
abort(404)
else:
return render_template('show_book_detail.html', book=book)
@app.route('/add-book', methods=['POST', 'GET'])
def add_book():
user_form = UserForm()
if request.method == 'POST':
if user_form.validate_on_submit():
# check if the post request has the file part
if 'file' not in request.files:
flash('No file part')
return redirect(request.url)
file = request.files['file']
# if user does not select file, browser also
# submit a empty part without filename
if file.filename == '':
flash('No selected file')
return redirect(request.url)
if file and allowed_file(file.filename):
filename = secure_filename(file.filename)
fullpath = os.path.join(app.config['UPLOAD_FOLDER'], filename)
file.save(fullpath)
title = user_form.title.data # You could also have used request.form['name']
author = user_form.author.data # You could also have used request.form['email']
# save user to database
book = Book(title, author, filename)
db.session.add(book)
db.session.commit()
flash("%s added to the library" % (title))
return redirect(url_for('show_books'))
else:
flash('allowed file formats: %s' % ALLOWED_EXTENSIONS)
flash_errors(user_form)
return render_template('add_book.html', form=user_form)
# Flash errors from the form if validation fails
def flash_errors(form):
for field, errors in form.errors.items():
for error in errors:
flash(u"Error in the %s field - %s" % (
getattr(form, field).label.text,
error
))
###
# The API
###
@app.route('/api/books', methods=['GET'])
def get_books():
books = Book.query.all()
data, errors = books_schema.dump(books)
return jsonify({'books': data})
@app.route('/api/books/<int:id>', methods=['GET'])
def get_book_by_id(id):
book = Book.query.get(id)
book_result, error = book_schema.dump(book)
if not book_result:
return jsonify({"message": "Book could not be found."}), 400
else:
return jsonify({'book': book_result})
###
# The functions below should be applicable to all Flask apps.
###
@app.route('/<file_name>.txt')
def send_text_file(file_name):
"""Send your static text file."""
file_dot_text = file_name + '.txt'
return app.send_static_file(file_dot_text)
@app.after_request
def add_header(response):
"""
Add headers to both force latest IE rendering engine or Chrome Frame,
and also to cache the rendered page for 10 minutes.
"""
response.headers['X-UA-Compatible'] = 'IE=Edge,chrome=1'
response.headers['Cache-Control'] = 'public, max-age=600'
return response
@app.errorhandler(404)
def page_not_found(error):
"""Custom 404 page."""
return render_template('404.html'), 404
if __name__ == '__main__':
app.run(debug=True,host="0.0.0.0",port="8080")