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We graded the security headers of 57 big websites: only 21 ship an effective CSP

We graded the security headers of 57 big websites: only 21 ship an effective CSP

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2 min read
403 Forbidden in Python requests: which bot wall sent it

403 Forbidden in Python requests: which bot wall sent it

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8 min read
Our 35 cached pages entered the edge over eight hours, one visitor at a time, and 16 of them in the same minute

Our 35 cached pages entered the edge over eight hours, one visitor at a time, and 16 of them in the same minute

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4 min read
Can Another Site Put Your Page in a Frame? 6 Clickjacking Checks, and What a Pass Doesn't Prove

Can Another Site Put Your Page in a Frame? 6 Clickjacking Checks, and What a Pass Doesn't Prove

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6 min read
The anatomy of a URL, and which part of it broke your link

The anatomy of a URL, and which part of it broke your link

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5 min read
Go 1.27 Drains Unread Response Bodies for You. Past 256 KB, the Connection Still Dies

Go 1.27 Drains Unread Response Bodies for You. Past 256 KB, the Connection Still Dies

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8 min read
What the Server Sends Back: The Response Headers of app.onepassapps.com

What the Server Sends Back: The Response Headers of app.onepassapps.com

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7 min read
I told readers to date a Vercel deploy by reading two headers, and both of them moved without a deploy

I told readers to date a Vercel deploy by reading two headers, and both of them moved without a deploy

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5 min read
Flutter ZIP-Code Autofill That Just Works

Flutter ZIP-Code Autofill That Just Works

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7 min read
HTTP security headers in ten minutes: a safe starter set for nginx and how to test it

HTTP security headers in ten minutes: a safe starter set for nginx and how to test it

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3 min read
I asked a chat app for a caching diagram. It drew the 304 as a 204.

I asked a chat app for a caching diagram. It drew the 304 as a 204.

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2 min read
CORS Explained Simply — Why Your Fetch Works in Postman but Fails in the Browser

CORS Explained Simply — Why Your Fetch Works in Postman but Fails in the Browser

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5 min read
Bisecting a request body to find why the API returned 403

Bisecting a request body to find why the API returned 403

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5 min read
HTTP 204 and SEO: A Successful Response Can Still Have No Answer

HTTP 204 and SEO: A Successful Response Can Still Have No Answer

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6 min read
HTTP Message Signatures need a canonical request, not a collection of headers

HTTP Message Signatures need a canonical request, not a collection of headers

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3 min read
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