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1
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import pprint |
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2
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import logging |
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3
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from urllib.parse import unquote |
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4
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5
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import requests |
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6
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from flask import (Response, url_for, render_template, send_file, |
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7
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current_app, request) |
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8
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9
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10
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log = logging.getLogger(__name__) |
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11
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12
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13
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1 |
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def route(*args, **kwargs): |
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14
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"""Unquoted version of Flask's `url_for`.""" |
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15
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1 |
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return _secure(unquote(url_for(*args, **kwargs))) |
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16
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17
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18
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1 |
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def _secure(url): |
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"""Ensure HTTPS is used in production.""" |
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20
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1 |
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if current_app.config['ENV'] == 'prod': |
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url = url.replace('http:', 'https:') |
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1 |
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return url |
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24
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25
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1 |
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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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27
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1 |
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mimetypes = request.headers.get('Accept', "").split(',') |
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28
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browser = 'text/html' in mimetypes |
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29
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1 |
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src_url = _sanitize_url_query_params(request) |
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30
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31
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1 |
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if browser or share: |
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log.info("Rending image on page: %s", src_url) |
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33
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34
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1 |
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html = render_template( |
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'image.html', |
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src=_secure(src_url), |
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title=title, |
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38
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ga_tid=get_tid(), |
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39
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) |
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40
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1 |
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return html if raw else _nocache(Response(html)) |
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41
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else: |
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log.info("Sending image: %s", path) |
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44
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1 |
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return send_file(path, mimetype=mimetype) |
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45
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46
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47
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1 |
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def _sanitize_url_query_params(req): |
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48
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"""Ensure query string does not affect image rendering.""" |
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49
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query_values = dict(req.args) |
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50
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src_query_params = ["{}={}".format(k, v[0]) |
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51
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for k, v in query_values.items() if k != 'share'] |
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52
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src_url = req.base_url |
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53
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if len(src_query_params): |
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54
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1 |
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src_url += "?{}".format("&".join(src_query_params)) |
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55
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return src_url |
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56
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57
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58
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1 |
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def _nocache(response): |
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59
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"""Ensure a response is not cached.""" |
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60
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response.headers['Cache-Control'] = 'no-cache, no-store, must-revalidate' |
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61
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response.headers['Pragma'] = 'no-cache' |
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62
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response.headers['Expires'] = '0' |
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63
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return response |
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64
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65
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66
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1 |
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def track(title): |
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67
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"""Log the requested content, server-side.""" |
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68
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data = dict( |
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v=1, |
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70
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tid=get_tid(), |
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71
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cid=request.remote_addr, |
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72
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73
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t='pageview', |
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74
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dh='memegen.link', |
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75
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dp=request.full_path, |
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76
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dt=str(title), |
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77
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78
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uip=request.remote_addr, |
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79
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ua=request.user_agent.string, |
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80
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) |
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81
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1 |
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if get_tid(default=None): |
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82
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requests.post("http://www.google-analytics.com/collect", data=data) |
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83
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else: |
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84
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1 |
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log.debug("Analytics data:\n%s", pprint.pformat(data)) |
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85
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86
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87
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1 |
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def get_tid(*, default='local'): |
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88
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"""Get the analtyics tracking identifier.""" |
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89
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return current_app.config['GOOGLE_ANALYTICS_TID'] or default |
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90
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jacebrowning /
memegen
This can be caused by one of the following:
1. Missing Dependencies
This error could indicate a configuration issue of Pylint. Make sure that your libraries are available by adding the necessary commands.
2. Missing __init__.py files
This error could also result from missing
__init__.pyfiles in your module folders. Make sure that you place one file in each sub-folder.