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backend: always send etags to make use of cache-control
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Simon Bruder 2019-07-05 20:47:56 +00:00
parent c69117f3c5
commit a35311111e
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GPG key ID: 6F03E0000CC5B62F
2 changed files with 18 additions and 5 deletions
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7
backend.py
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@ -184,16 +184,19 @@ class CalibreDB:
path = self.get_volume_filepath(volume_id)
with ZipFile(path, 'r') as volume:
try:
page_filename = volume.filelist[page_number - 1].filename
zip_info = volume.filelist[page_number - 1]
except IndexError:
raise exceptions.NotFound()
return None
page_filename = zip_info.filename
page_data = BytesIO()
page_data.write(volume.read(page_filename))
page_data.seek(0)
return {
'data': page_data,
'mimetype': mimetypes[os.path.splitext(page_filename)[1]]
'mimetype': mimetypes[os.path.splitext(page_filename)[1]],
'etag': str(zip_info.CRC)
}

16
mangareader.py
View file

@ -3,6 +3,7 @@ from backend import CalibreDB
from flask import Flask, jsonify, send_from_directory, send_file, render_template, request
from flask_cors import CORS
from werkzeug.routing import BaseConverter
from zlib import crc32
import os
@ -10,6 +11,13 @@ def send_from_cwd(filename):
return send_from_directory(os.getcwd(), filename)
def send_file_with_etag(fp, **kwargs):
response = send_file(fp, **kwargs)
response.set_etag(str(crc32(fp.read())))
fp.seek(0)
return response
app = Flask(__name__, static_folder='frontend/dist/static', template_folder='frontend/dist')
app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 604800 # 1 week
CORS(app)
@ -37,7 +45,7 @@ def get_series_cover(series_id):
@app.route('/api/series/<int:series_id>/cover/thumbnail')
def get_series_cover_thumbnail(series_id):
thumbnail = db.get_series_cover_thumbnail(series_id)
return send_file(thumbnail, mimetype='image/jpeg')
return send_file_with_etag(thumbnail, mimetype='image/jpeg')
@app.route('/api/series/<int:series_id>')
@ -53,7 +61,7 @@ def get_volume_cover(volume_id):
@app.route('/api/volume/<int:volume_id>/cover/thumbnail')
def get_volume_cover_thumbnail(volume_id):
thumbnail = db.get_volume_cover_thumbnail(volume_id)
return send_file(thumbnail, mimetype='image/jpeg')
return send_file_with_etag(thumbnail, mimetype='image/jpeg')
@app.route('/api/volume/<int:volume_id>')
@ -64,7 +72,9 @@ def get_volume_info(volume_id):
@app.route('/api/volume/<int:volume_id>/page/<int:page_number>')
def get_volume_page(volume_id, page_number):
page = db.get_volume_page(volume_id, page_number)
return send_file(page['data'], mimetype=page['mimetype'])
response = send_file(page['data'], mimetype=page['mimetype'])
response.set_etag(page['etag'])
return response
if __name__ == '__main__':