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Merge branch '11-static-cache' into 'master'

Resolve "Caching of Static Resources"

Closes #11

See merge request s3lph/matemat!13
This commit is contained in:
s3lph 2018-07-14 21:08:26 +00:00
commit 8da1746d0c
3 changed files with 49 additions and 2 deletions

View file

@ -323,7 +323,7 @@ class HttpHandler(BaseHTTPRequestHandler):
# Send the HTTP status code
self.send_response(hsc)
# Format the session cookie timeout string and send the session cookie header
expires = timeout.strftime("%a, %d %b %Y %H:%M:%S GMT")
expires = timeout.strftime('%a, %d %b %Y %H:%M:%S GMT')
self.send_header('Set-Cookie',
f'matemat_session_id={session_id}; expires={expires}')
# Compute the body length and add the appropriate header
@ -345,6 +345,21 @@ class HttpHandler(BaseHTTPRequestHandler):
filepath: str = os.path.abspath(os.path.join(self.server.webroot, path[1:]))
# Make sure the file is actually inside the webroot directory and that it exists
if os.path.commonpath([filepath, self.server.webroot]) == self.server.webroot and os.path.exists(filepath):
# Parse the If-Modified-Since header to check whether the browser can reuse cached content
datestr: str = self.headers.get('If-Modified-Since', 'Thu, 01 Jan 1970 00:00:00 GMT')
maxage: datetime = datetime.strptime(datestr, '%a, %d %b %Y %H:%M:%S %Z')
# Get file modification time
filestat: int = int(os.path.getmtime(filepath))
# Create UTC datetime object from mtime
fileage: datetime = datetime.utcfromtimestamp(filestat)
# If the file has not been replaced by a newer version than requested by the client, send a 304 response
if fileage <= maxage:
self.send_response(304, 'Not Modified')
self.send_header('Content-Length', '0')
self.end_headers()
return
# Open and read the file
with open(filepath, 'rb') as f:
data = f.read()
@ -358,6 +373,8 @@ class HttpHandler(BaseHTTPRequestHandler):
# Send content type and length header
self.send_header('Content-Type', mimetype)
self.send_header('Content-Length', str(len(data)))
self.send_header('Last-Modified', fileage.strftime('%a, %d %b %Y %H:%M:%S GMT'))
self.send_header('Cache-Control', 'max-age=1')
self.end_headers()
# Send the requested resource as response body
self.wfile.write(data)

View file

@ -118,7 +118,7 @@ class MockServer:
)
# Set up logger
self.logger: logging.Logger = logging.getLogger('matemat unit test')
self.logger.setLevel(0)
self.logger.setLevel(logging.DEBUG)
# Initalize a log handler to stderr and set the log format
sh: logging.StreamHandler = logging.StreamHandler()
sh.setFormatter(logging.Formatter('%(asctime)s %(name)s [%(levelname)s]: %(message)s'))

View file

@ -3,6 +3,8 @@ from typing import Any, Dict, Union
import os
import os.path
from datetime import datetime, timedelta
from matemat.exceptions import HttpException
from matemat.webserver import HttpHandler, RequestArguments, PageletResponse, RedirectResponse, TemplateResponse
from matemat.webserver.test.abstract_httpd_test import AbstractHttpdTest, test_pagelet
@ -163,6 +165,34 @@ class TestServe(AbstractHttpdTest):
self.assertEqual(403, packet.statuscode)
self.assertNotEqual(b'This should not be readable', packet.body)
def test_serve_static_cache(self):
# Request a static resource
timeout: datetime = datetime.utcnow() + timedelta(hours=1)
timeoutstr = timeout.strftime('%a, %d %b %Y %H:%M:%S GMT')
self.client_sock.set_request(
f'GET /static_resource.txt HTTP/1.1\r\nIf-Modified-Since: {timeoutstr}\r\n\r\n'.encode('utf-8'))
HttpHandler(self.client_sock, ('::1', 45678), self.server)
packet = self.client_sock.get_response()
# Make sure that no pagelet was called
self.assertIsNone(packet.pagelet)
# Make sure a 304 Not Modified is sent and the body is empty
self.assertEqual(304, packet.statuscode)
self.assertEqual(0, len(packet.body))
def test_serve_static_cache_renew(self):
# Request a static resource
self.client_sock.set_request(
b'GET /static_resource.txt HTTP/1.1\r\nIf-Modified-Since: Mon, 01 Jan 2018 13:37:42 GMT\r\n\r\n')
HttpHandler(self.client_sock, ('::1', 45678), self.server)
packet = self.client_sock.get_response()
# Make sure that no pagelet was called
self.assertIsNone(packet.pagelet)
# Make sure the expected content is served
self.assertEqual(200, packet.statuscode)
self.assertEqual(b'static resource test', packet.body)
def test_serve_not_found(self):
# Request a nonexistent resource
self.client_sock.set_request(b'GET /nonexistent HTTP/1.1\r\n\r\n')