---
title: The ultimate HTTP talk
description: An example slide deck created by Marp CLI
author: Yuki Hattori
keywords: marp,marp-cli,slide
url: https://marp.app/
image: https://marp.app/og-image.jpg
---

# HYPER HYPER!

## The ultimate HTTP talk

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# Headers

- X means unofficial
- Request/Response

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# Request Headers

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# Cookie Header

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# Forwarded Header

- Replacement for `X-Forwarded-For`, `X-Forwarded-Host` and `X-Forwarded-Proto`
- `Forwarded: by=<identifier>;for=<identifier>;host=<host>;proto=<http|https>`
- IPv6 addresses need double quotes and brackets

https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Forwarded

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# Host Header

- `Host: <host>:<port>`

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# Referer Header

- This is how they make money

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# Upgrade (HTTP/1.1)

- `Upgrade: <protocol>[/<protocol_version>]`
- Upgrade connection to different HTTP version or Websocket

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# User-Agent Header

- `User-Agent: <product> / <product-version> <comment>`
- `Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0`

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# Via Header

- `Via: [<protocol-name>/]<protocol-version> <host>[:<port>]`
- `Via: [<protocol-name>/]<protocol-version> <pseudonym>`

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# Response Headers

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# ETag Header

- `ETag: W/"<etag_value>"`
- `ETag: "<etag_value>"`

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# todo

-