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{{ TODO |
The Hypertext Transfer Protocol (HTTP) is an [[Networking application layer|application layer]] protocol.
clean this up }}
{{ TODO |
add section for headers, CORS, Content Security Policy, etc }}


= Documentation =
= Documentation =
<blockquote>
{| class="wikitable"
|-
| RFC 7230: HTTP/1.1 Message Syntax and Routing || https://datatracker.ietf.org/doc/html/rfc7230
|-
| RFC 7231: HTTP/1.1 Semantics and Content || https://datatracker.ietf.org/doc/html/rfc7231
|-
| RFC 7232: HTTP/1.1 Conditional Requests || https://datatracker.ietf.org/doc/html/rfc7232
|-
| RFC 7233: HTTP/1.1 Range Requests || https://datatracker.ietf.org/doc/html/rfc7233
|-
| RFC 7234: HTTP/1.1 Caching || https://datatracker.ietf.org/doc/html/rfc7234
|-
| RFC 7235: HTTP/1.1 Authentication || https://datatracker.ietf.org/doc/html/rfc7235
|-
|}
</blockquote><!-- Documentation -->
= Tutorials =
<blockquote>
<blockquote>
{| class="wikitable"
{| class="wikitable"
|-
|-
| MDN HTTP overview || https://developer.mozilla.org/en-US/docs/Web/HTTP/Overview
| MDN HTTP overview || https://developer.mozilla.org/en-US/docs/Web/HTTP/Overview
|-
| MDN Evolution of HTTP || https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Evolution_of_HTTP
|-
|-
| http headers || https://en.wikipedia.org/wiki/List_of_HTTP_header_fields
| http headers || https://en.wikipedia.org/wiki/List_of_HTTP_header_fields
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∨ Hypertext Transfer Protocol
∨ Hypertext Transfer Protocol


Frame 210: 776 bytes on wire (6208 bits), 776 bytes captured (6208 bits) on interface eno1, id 0
HTTP/1.1 200 OK
Ethernet II, Src: 76:ac:b9:4a:17:32 (76:ac:b9:4a:17:32), Dst: Giga-Byt_32:03:d9 (90:2b:34:32:03:d9)
Server: nginx/1.20.1
Internet Protocol Version 4, Src: 167.99.186.1, Dst: 192.168.1.183
Date: Sat, 18 Sep 2021 13:51:13 GMT
Transmission Control Protocol, Src Port: 80, Dst Port: 33028, Seq: 1, Ack: 368, Len: 710
Content-Type: text/html
Hypertext Transfer Protocol
Content-Length: 340
    HTTP/1.1 404 Not Found\r\n
Last-Modified: Mon, 05 Apr 2021 14:47:38 GMT
    Server: nginx/1.20.1\r\n
Connection: close
    Date: Sat, 18 Sep 2021 13:44:20 GMT\r\n
ETag: "606b230a-154"
    Content-Type: text/html\r\n
Accept-Ranges: bytes
    Content-Length: 555\r\n
 
    Connection: keep-alive\r\n
<html>
    \r\n
<header>
    [HTTP response 1/1]
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/kognise/water.css@latest/dist/light.min.css">
    [Time since request: 0.025539370 seconds]
</header>
    [Request in frame: 209]
    [Request URI: http://willpittman.net/favicon.ico]
    File Data: 555 bytes
Line-based text data: text/html (13 lines)


<body>
<h1>Welcome</h1>
</body>
</html>
</syntaxhighlight>
</syntaxhighlight>


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</blockquote><!-- Example -->
</blockquote><!-- Example -->


= Notes =
= Protocol =
<blockquote>
<blockquote>
{| class="wikitable"
{|
|-
| [[http protocol]]
|-
|-
| [[http headers]]
| [[http headers]]
|-
|-
| [[http statuses]]
| [[http statuses]]
|-
|}
</blockquote><!-- Protocol -->
= Notes =
<blockquote>
{|
|-
| [[http security]]
|-
|-
| [[http cookies]]
| [[http cookies]]

Latest revision as of 15:39, 18 September 2021

The Hypertext Transfer Protocol (HTTP) is an application layer protocol.

Documentation

RFC 7230: HTTP/1.1 Message Syntax and Routing https://datatracker.ietf.org/doc/html/rfc7230
RFC 7231: HTTP/1.1 Semantics and Content https://datatracker.ietf.org/doc/html/rfc7231
RFC 7232: HTTP/1.1 Conditional Requests https://datatracker.ietf.org/doc/html/rfc7232
RFC 7233: HTTP/1.1 Range Requests https://datatracker.ietf.org/doc/html/rfc7233
RFC 7234: HTTP/1.1 Caching https://datatracker.ietf.org/doc/html/rfc7234
RFC 7235: HTTP/1.1 Authentication https://datatracker.ietf.org/doc/html/rfc7235

Tutorials

MDN HTTP overview https://developer.mozilla.org/en-US/docs/Web/HTTP/Overview
MDN Evolution of HTTP https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Evolution_of_HTTP
http headers https://en.wikipedia.org/wiki/List_of_HTTP_header_fields

Example

Perform a raw HTTP request using netcat. 

cat << EOF | nc willpittman.net 80
GET / HTTP/1.1
Host: willpittman.net
Connection: close

EOF  # blank line intentional

You can also inspect an HTTP request from any source using wireshark.

HTTP request 


> Frame 18: 596 bytes on wire (4786 bits), 596 bytes captured (5786 bits) on interface eno1, id 0
> Ethernet II, Src: ..., Dst: ...
> Internet Protocol Version 4, Src: 100.100.100.100, Dst: 200.200.200.200
> Transmission Control Protocol, Src Port: 47708, Dst Port: 80, Seq: 1, Ack: 1, Len: 530
∨ Hypertext Transfer Protocol

GET / HTTP/1.1
Host: willpittman.net
Connection: keep-alive
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
If-None-Match: "606b230a-154"
If-Modified-Since: Mon, 05 Apr 2021 14:47:38 GMT


HTTP response 


> Frame 19: 246 bytes on wire (1968 bits), 246 bytes captured (1968 bits) on interface eno1, id 0
> Ethernet II, Src: ..., Dst: ...
> Internet Protocol Version 4, Src: 200.200.200.200, Dst: 100.100.100.100
> Transmission Control Protocol, Src Port: 80, Dst Port: 47708, Seq: 1, Ack: 531, Len: 180
∨ Hypertext Transfer Protocol

HTTP/1.1 200 OK
Server: nginx/1.20.1
Date: Sat, 18 Sep 2021 13:51:13 GMT
Content-Type: text/html
Content-Length: 340
Last-Modified: Mon, 05 Apr 2021 14:47:38 GMT
Connection: close
ETag: "606b230a-154"
Accept-Ranges: bytes

<html>
<header>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/kognise/water.css@latest/dist/light.min.css">
</header>

<body>
<h1>Welcome</h1>
</body>
</html>


Protocol

http headers
http statuses

Notes

http security
http cookies
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