/
server.py
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/
server.py
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import collections
import datetime
import functools
import os
import urllib.parse
from urllib.parse import parse_qsl, urlparse, urlencode
from flask import (
Flask,
make_response,
render_template,
request,
send_file,
send_from_directory,
)
import hyperlink
import smartypants
from werkzeug.middleware.profiler import ProfilerMiddleware
from docstore.documents import find_original_filename, read_documents
from docstore.tag_cloud import TagCloud
from docstore.tag_list import render_tag_list
from docstore.text_utils import hostname, pretty_date
def tags_with_prefix(document, prefix):
return [t for t in document.tags if t.startswith(prefix)]
def tags_without_prefix(document, prefix):
return [t for t in document.tags if not t.startswith(prefix)]
def url_without_sortby(u):
url = hyperlink.URL.from_text(u)
return str(url.remove("sortBy"))
def serve_file(*, root, shard, filename):
"""
Serves a file which has been saved in docstore.
This adds the Content-Disposition header to the response, so files
are downloaded with the original filename they were uploaded as,
rather than the normalised filename.
"""
path = os.path.abspath(os.path.join(root, "files", shard, filename))
response = make_response(send_file(path))
original_filename = find_original_filename(root, path=path)
# See https://stackoverflow.com/a/49481671/1558022 for UTF-8 encoding
encoded_filename = urllib.parse.quote(original_filename, encoding="utf-8")
response.headers["Content-Disposition"] = f"filename*=utf-8''{encoded_filename}"
return response
def create_app(title, root, thumbnail_width):
app = Flask(__name__)
app.config["THUMBNAIL_WIDTH"] = thumbnail_width
app.jinja_env.trim_blocks = True
app.jinja_env.lstrip_blocks = True
app.jinja_env.filters["hostname"] = hostname
app.jinja_env.filters["pretty_date"] = lambda d: pretty_date(
d, now=datetime.datetime.now()
)
app.jinja_env.filters["render_tag_list"] = render_tag_list
app.jinja_env.filters["smartypants"] = smartypants.smartypants
app.jinja_env.filters["url_without_sortby"] = url_without_sortby
app.jinja_env.filters["tags_with_prefix"] = tags_with_prefix
app.jinja_env.filters["tags_without_prefix"] = tags_without_prefix
@app.route("/")
def list_documents():
request_tags = set(request.args.getlist("tag"))
documents = [
doc for doc in read_documents(root) if request_tags.issubset(set(doc.tags))
]
tag_tally = collections.Counter()
for doc in documents:
for t in doc.tags:
tag_tally[t] += 1
try:
page = int(request.args["page"])
except KeyError:
page = 1
sort_by = request.args.get("sortBy", "date (newest first)")
if sort_by.startswith("date"):
sort_key = lambda d: d.date_saved
elif sort_by.startswith("title"):
sort_key = lambda d: d.title.lower()
else:
raise ValueError(f"Unrecognised sortBy query parameter: {sort_by}")
if sort_by in {"date (newest first)", "title (Z to A)"}:
sort_reverse = True
else:
sort_reverse = False
html = render_template(
"index.html",
documents=sorted(documents, key=sort_key, reverse=sort_reverse),
request_tags=request_tags,
query_string=tuple(parse_qsl(urlparse(request.url).query)),
tag_tally=tag_tally,
title=title,
page=page,
sort_by=sort_by,
TagCloud=TagCloud,
)
return html
@app.route("/thumbnails/<shard>/<filename>")
def thumbnails(shard, filename):
return send_from_directory(
os.path.abspath(os.path.join(root, "thumbnails", shard)), filename=filename
)
app.add_url_rule(
rule="/files/<shard>/<filename>",
view_func=lambda shard, filename: serve_file(
root=root, shard=shard, filename=filename
),
)
@app.template_filter("add_tag")
@functools.lru_cache()
def add_tag(query_string, tag):
return "?" + urlencode(
[(k, v) for k, v in query_string if k != "page"] + [("tag", tag)]
)
@app.template_filter("remove_tag")
def remove_tag(query_string, tag):
return "?" + urlencode(
[(k, v) for k, v in query_string if (k, v) != ("tag", tag)]
)
@app.template_filter("set_page")
@functools.lru_cache()
def set_page(query_string, page):
pageless_qs = [(k, v) for k, v in query_string if k != "page"]
if page == 1:
return "?" + urlencode(pageless_qs)
else:
return "?" + urlencode(pageless_qs + [("page", page)])
return app
def run_profiler(*, host, port, **kwargs): # pragma: no cover
app = create_app(**kwargs)
app.config["PROFILE"] = True
app.wsgi_app = ProfilerMiddleware(app.wsgi_app, restrictions=[30])
app.run(host=host, port=port, debug=True)
def run_server(*, host, port, debug, **kwargs): # pragma: no cover
app = create_app(**kwargs)
app.run(host=host, port=port, debug=debug)