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106 linhas
3.1 KiB
106 linhas
3.1 KiB
# -*- coding: utf-8 -*-
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"""
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:author: Grey Li (李辉)
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:url: http://greyli.com
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:copyright: © 2018 Grey Li <withlihui@gmail.com>
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:license: MIT, see LICENSE for more details.
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"""
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import os
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import uuid
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try:
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from urlparse import urlparse, urljoin
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except ImportError:
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from urllib.parse import urlparse, urljoin
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import PIL
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from PIL import Image
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from flask import current_app, request, url_for, redirect, flash
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from itsdangerous import BadSignature, SignatureExpired
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from itsdangerous import TimedJSONWebSignatureSerializer as Serializer
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from albumy.extensions import db
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from albumy.models import User
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from albumy.settings import Operations
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def generate_token(user, operation, expire_in=None, **kwargs):
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s = Serializer(current_app.config['SECRET_KEY'], expire_in)
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data = {'id': user.id, 'operation': operation}
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data.update(**kwargs)
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return s.dumps(data)
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def validate_token(user, token, operation, new_password=None):
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s = Serializer(current_app.config['SECRET_KEY'])
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try:
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data = s.loads(token)
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except (SignatureExpired, BadSignature):
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return False
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if operation != data.get('operation') or user.id != data.get('id'):
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return False
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if operation == Operations.CONFIRM:
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user.confirmed = True
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elif operation == Operations.RESET_PASSWORD:
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user.set_password(new_password)
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elif operation == Operations.CHANGE_EMAIL:
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new_email = data.get('new_email')
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if new_email is None:
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return False
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if User.query.filter_by(email=new_email).first() is not None:
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return False
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user.email = new_email
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else:
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return False
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db.session.commit()
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return True
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def rename_image(old_filename):
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ext = os.path.splitext(old_filename)[1]
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new_filename = uuid.uuid4().hex + ext
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return new_filename
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def resize_image(image, filename, base_width):
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filename, ext = os.path.splitext(filename)
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img = Image.open(image)
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if img.size[0] <= base_width:
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return filename + ext
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w_percent = (base_width / float(img.size[0]))
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h_size = int((float(img.size[1]) * float(w_percent)))
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img = img.resize((base_width, h_size), PIL.Image.ANTIALIAS)
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filename += current_app.config['ALBUMY_PHOTO_SUFFIX'][base_width] + ext
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img.save(os.path.join(current_app.config['ALBUMY_UPLOAD_PATH'], filename), optimize=True, quality=85)
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return filename
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def is_safe_url(target):
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ref_url = urlparse(request.host_url)
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test_url = urlparse(urljoin(request.host_url, target))
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return test_url.scheme in ('http', 'https') and \
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ref_url.netloc == test_url.netloc
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def redirect_back(default='main.index', **kwargs):
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for target in request.args.get('next'), request.referrer:
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if not target:
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continue
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if is_safe_url(target):
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return redirect(target)
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return redirect(url_for(default, **kwargs))
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def flash_errors(form):
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for field, errors in form.errors.items():
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for error in errors:
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flash(u"Error in the %s field - %s" % (
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getattr(form, field).label.text,
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error
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))
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