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Use an ETag to allow caching JSON representation of Tag Browser client side

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Kovid Goyal 2015-12-21 15:57:01 +05:30
parent b14405e6a1
commit bcc9f7b24a
1 changed files with 8 additions and 3 deletions
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11
src/calibre/srv/code.py
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@ -4,7 +4,7 @@
from __future__ import (unicode_literals, division, absolute_import,
print_function)
import re
import re, hashlib
from functools import partial
from threading import Lock
from json import load as load_json_file
@ -215,7 +215,7 @@ def get_books(ctx, rd):
mdata[book_id] = data
return ans
@endpoint('/interface-data/tag-browser', postprocess=json)
@endpoint('/interface-data/tag-browser')
def tag_browser(ctx, rd):
'''
Get the Tag Browser serialized as JSON
@ -223,4 +223,9 @@ def tag_browser(ctx, rd):
&collapse_at=25&dont_collapse=
'''
db, library_id = get_library_data(ctx, rd.query)[:2]
return categories_as_json(ctx, rd, db)
etag = '%s||%s||%s' % (db.last_modified(), rd.username, library_id)
etag = hashlib.sha1(etag.encode('utf-8')).hexdigest()
def generate():
db, library_id = get_library_data(ctx, rd.query)[:2]
return json(ctx, rd, tag_browser, categories_as_json(ctx, rd, db))
return rd.etagged_dynamic_response(etag, generate)