Headers
- How I build an HTTP header block without forgetting security headers
Building headers from key/value rows helps avoid typo-heavy manual header blocks. I use HTTP Header Builder for the quick version of this task, then I review the output before relying on it.
- How I read email headers when a message looks suspicious
An email header is the technical history of a message. It can show where the message claimed to come from, which servers handled it, and whether authentication checks passed. The visible email body can be misleading.
- How I read HTTP headers when an API or website behaves strangely
HTTP headers are small pieces of metadata sent with a request or response. They can explain things that are not visible in the page body. When a website or API behaves strangely, I often look at the headers first.