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import logging |
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from urllib.parse import unquote |
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import requests |
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from flask import (Response, url_for, render_template, send_file, |
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current_app, request) |
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log = logging.getLogger(__name__) |
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def samples(blank=False): |
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"""Generate dictionaries of sample image data for template rendering.""" |
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for template in sorted(current_app.template_service.all()): |
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path = "_" if blank else template.sample_path |
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url = route('image.get', key=template.key, path=path, |
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preview=True, watermark='none') |
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yield { |
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'key': template.key, |
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'name': template.name, |
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'url': url, |
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} |
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def route(*args, **kwargs): |
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"""Unquoted version of Flask's `url_for`.""" |
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for key, value in sorted(kwargs.items()): |
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if value is True: |
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kwargs[key] = 'true' |
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return _secure(unquote(url_for(*args, **kwargs))) |
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def display(title, path, share=False, raw=False, mimetype='image/jpeg'): |
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"""Render a webpage or raw image based on request.""" |
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img = _format_url(request, 'share') |
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img_twitter = _format_url( |
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request, 'share', |
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width=current_app.config['TWITTER_IMAGE_WIDTH'], |
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height=current_app.config['TWITTER_IMAGE_HEIGHT'], |
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) |
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img_facebook = _format_url( |
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request, 'share', |
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width=current_app.config['FACEBOOK_IMAGE_WIDTH'], |
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height=current_app.config['FACEBOOK_IMAGE_HEIGHT'], |
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) |
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url = _format_url(request, 'width', 'height') |
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if share: |
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log.info("Sharing image on page: %s", img) |
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html = render_template( |
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'share.html', |
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title=title, |
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img=_secure(img), |
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img_twitter=_secure(img_twitter), |
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img_facebook=_secure(img_facebook), |
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url=_secure(url), |
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config=current_app.config, |
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) |
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return html if raw else _nocache(Response(html)) |
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else: |
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log.info("Sending image: %s", path) |
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return send_file(path, mimetype=mimetype) |
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def track(title): |
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"""Log the requested content, server-side.""" |
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google_url = current_app.config['GOOGLE_ANALYTICS_URL'] |
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google_tid = current_app.config['GOOGLE_ANALYTICS_TID'] |
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google_data = dict( |
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v=1, |
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tid=google_tid, |
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cid=request.remote_addr, |
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t='pageview', |
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dh='memegen.link', |
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dp=request.full_path, |
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dt=str(title), |
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uip=request.remote_addr, |
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ua=request.user_agent.string, |
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) |
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if google_tid != 'localhost': |
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response = requests.post(google_url, data=google_data) |
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params = _format_query(google_data, as_string=True) |
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log.debug("Tracking POST: %s %s", response.url, params) |
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remote_url = current_app.config['REMOTE_TRACKING_URL'] |
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remote_data = dict( |
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text=str(title), |
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source='memegen.link', |
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context=unquote(request.url), |
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) |
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if remote_url: |
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response = requests.get(remote_url, params=remote_data) |
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log.debug("Tracking GET: %s", response.url) |
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def _secure(url): |
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"""Ensure HTTPS is used in production.""" |
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if current_app.config['ENV'] == 'prod': |
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if url.startswith('http:'): |
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url = url.replace('http:', 'https:', 1) |
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return url |
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108
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109
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def _format_url(req, *skip, **add): |
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"""Get a formatted URL with sanitized query parameters.""" |
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base = req.base_url |
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1 |
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113
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options = {k: v[0] for k, v in dict(req.args).items() if k not in skip} |
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options.update(add) |
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params = _format_query(options) |
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if params: |
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return base + "?{}".format("&".join(params)) |
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else: |
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return base |
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123
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124
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def _format_query(options, *, as_string=False): |
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pattern = "{}={!r}" if as_string else "{}={}" |
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pairs = sorted(pattern.format(k, v) for k, v in options.items()) |
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if as_string: |
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return ' '.join(pairs) |
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return pairs |
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131
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132
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def _nocache(response): |
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"""Ensure a response is not cached.""" |
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response.headers['Cache-Control'] = 'no-cache, no-store, must-revalidate' |
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response.headers['Pragma'] = 'no-cache' |
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response.headers['Expires'] = '0' |
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return response |
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jacebrowning /
memegen
