xppl/app/views.py

"""
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")