40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
import datetime
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import io
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import redis
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from PIL import Image, ImageDraw, ImageFont
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from flask import Flask, send_file, make_response
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NO_MAP_STR = 'NO GLOBAL MAP AVAILABLE'
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app = Flask(__name__)
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redis_client = redis.Redis(host='localhost', port=6379)
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@app.route('/global')
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def serve_global_map():
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global_map_data = redis_client.get('global_map')
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if global_map_data is None:
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img = Image.new('RGB', (633, 356), color=(255, 255, 255))
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d = ImageDraw.Draw(img)
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fnt = ImageFont.load_default(size=30)
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w, h = fnt.getbbox(NO_MAP_STR)[2:4]
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d.text(((500 - w) / 2, (300 - h) / 2), NO_MAP_STR, font=fnt, fill=(0, 0, 0))
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buf = io.BytesIO()
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img.save(buf, format='PNG')
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buf.seek(0)
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return send_file(buf, mimetype='image/png')
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buf = io.BytesIO(global_map_data)
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buf.seek(0)
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response = make_response(send_file(buf, mimetype='image/png'))
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expires = datetime.datetime.now()
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expires = expires + datetime.timedelta(minutes=10)
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response.headers['Cache-Control'] = 'public, max-age=600'
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response.headers['Expires'] = expires.strftime("%a, %d %b %Y %H:%M:%S GMT")
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return response
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if __name__ == '__main__':
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app.run()
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