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robertknight /
Last active Nov 1, 2019
Optimized charmap generation
import sys
import time
import unicodedata
def gen_charmap_new():
current_cat = None
current_cat_start = None
ranges = []
robertknight /
Created Oct 3, 2019
Remove __future__ imports from Python files
import sys
files = sys.argv[1:]
for path in files:
print(f"Updating {path}")
out_lines = []
prev_line_was_future_import = False
with open(path) as file:
robertknight /
Last active Sep 12, 2019
Chrome range request + HTTP cache interaction issue

Steps to reproduce:

  1. Save range-request.html locally and open it in Chrome
  2. Clear your browser cache by going to chrome://settings/clearBrowserData, checking "Cached images and files" and clicking "Clear data"
  3. Open the devtools and make sure that the "Disable cache" option is not checked in the Network tab.
  4. Click the "Fetch file with Range requests" button. Observe the console logs and wait for the complete file to be fetched.
  5. Click the "Fetch file with one request" button and observe the console logs.
  6. Click the "Fetch file with one request" button again and observe the console logs.

Expected result:

robertknight / google-drive-test.diff
Created Aug 22, 2019
Cross-site file fetching test in the Hypothesis LMS app
View google-drive-test.diff
diff --git a/lms/static/scripts/frontend_apps/components/FilePickerApp.js b/lms/static/scripts/frontend_apps/components/FilePickerApp.js
index 1e32c81..a040a75 100644
--- a/lms/static/scripts/frontend_apps/components/FilePickerApp.js
+++ b/lms/static/scripts/frontend_apps/components/FilePickerApp.js
@@ -91,9 +91,11 @@ export default function FilePickerApp({
try {
const { id, url } = await googlePicker.showPicker();
+ await googlePicker.fetchFile(id);
await googlePicker.enablePublicViewing(id);
robertknight / delay.diff
Created Jul 29, 2019
Add a short delay to action dispatches
View delay.diff
diff --git a/src/sidebar/store/index.js b/src/sidebar/store/index.js
index 8051a738..1e725db5 100644
--- a/src/sidebar/store/index.js
+++ b/src/sidebar/store/index.js
@@ -71,6 +71,33 @@ function angularDigestMiddleware($rootScope) {
+ * Middleware which adds an artificial delay to all actions going through
robertknight /
Last active Nov 16, 2018
Rate limiting test script
#!/usr/bin/env python3
from binascii import hexlify
import time
from random import randint
import requests
regular_url = "http://localhost:5000/_status"
robertknight / putty-port-forwarding.png
Last active Oct 25, 2018
Testing and debugging Hypothesis on mobile devices and in virtual machines
robertknight /
Last active Sep 18, 2018
Bookmarklet to toggle visibility of fixed overlays on screen

This is a browser bookmarklet which hides annoying overlays on web pages that are positioned at fixed locations on the page and don't move as you scroll. This is particularly useful for smaller desktop screens (I have a 13" MacBook Pro). Examples include:

  • Cookie banners
  • Banners at the top and bottom of the page on Medium-powered blogs telling you to sign in
  • Navigation bars on web pages that don't scroll out of the way when you scroll down


  1. Create a new bookmark
  2. Copy the content of toggle-fixed-element.js
robertknight /
Created Aug 27, 2018
Colander schemas for query string parsing
class ColanderSearchParamsSchema(colander.Schema):
# Fields that affect search result number and ordering.
sort = colander.SchemaNode(colander.String(),
validator=colander.OneOf(["updated", "created", "id", "group", "user"]),
order = colander.SchemaNode(colander.String(),
validator=colander.OneOf(["asc", "desc"]),
robertknight /
Last active Mar 5, 2018
Using the Hypothesis development client on secure websites
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