<s> from redwind import util <EOL> from flask import request , abort , send_file , url_for , make_response , Blueprint , escape , current_app <EOL> from requests . exceptions import HTTPError <EOL> import datetime <EOL> import hashlib <EOL> import hmac <EOL> import json <EOL> import os <EOL> import shutil <EOL> import sys <EOL> import urllib . parse <EOL> imageproxy = Blueprint ( '<STR_LIT>' , __name__ ) <EOL> def construct_url ( url , size = None , external = False ) : <EOL> from redwind . models import get_settings <EOL> if not url or '<STR_LIT>' not in current_app . config : <EOL> return url <EOL> url = urllib . parse . urljoin ( get_settings ( ) . site_url , url ) <EOL> query = [ ( '<STR_LIT:url>' , url ) ] <EOL> if size : <EOL> query += [ ( '<STR_LIT:w>' , size ) , ( '<STR_LIT:h>' , size ) , ( '<STR_LIT>' , '<STR_LIT>' ) ] <EOL> else : <EOL> query += [ ( '<STR_LIT>' , '<STR_LIT>' ) ] <EOL> querystring = urllib . parse . urlencode ( query ) <EOL> if '<STR_LIT>' in current_app . config : <EOL> h = hmac . new ( current_app . config [ '<STR_LIT>' ] . encode ( ) , <EOL> querystring . encode ( ) , hashlib . sha1 ) <EOL> querystring += '<STR_LIT>' + h . hexdigest ( ) <EOL> proxy_url = current_app . config [ '<STR_LIT>' ] + '<STR_LIT:?>' + querystring <EOL> if external : <EOL> proxy_url = urllib . parse . urljoin ( get_settings ( ) . site_url , proxy_url ) <EOL> return proxy_url <EOL> @ imageproxy . app_template_filter ( '<STR_LIT>' ) <EOL> def imageproxy_filter ( src , side = None , external = False ) : <EOL> return escape ( <EOL> construct_url ( src , side and str ( side ) , external ) ) </s>
