General refresh and work on proxy slides

Doctor-love · Doctor-love · commit a7ddfea86ef8 · 2026-02-19T22:18:14.000+01:00
diff --git a/LICENSES/CC-BY-4.0.txt b/LICENSES/CC-BY-4.0.txt
diff --git a/_images_originals/demolition_pigeon.jpg b/_images_originals/demolition_pigeon.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1478034f1544c1327bcad5a50d4050de8f56ee843eb402f3f3bd2bcf8af8f823
+size 2760679
diff --git a/_images_originals/demolition_pigeon.jpg.license b/_images_originals/demolition_pigeon.jpg.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: © Adam Lusch
+SPDX-License-Identifier: CC-BY-SA-2.0
diff --git a/_images_originals/gate.jpg b/_images_originals/gate.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4c952788970160a4c0bc96adf0e460cdc9ec880631fcfe8ce88855c18c626c7e
+size 3217733
diff --git a/_images_originals/gate.jpg.license b/_images_originals/gate.jpg.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: © Brendan J
+SPDX-License-Identifier: CC-BY-2.0
diff --git a/_images_originals/holmen_crane.jpg b/_images_originals/holmen_crane.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d83cc7fd1d1bfdcf4cc558e6b9391fefd7b4de2163ef1f43c695ace69d46a5e0
+size 3048364
diff --git a/_images_originals/holmen_crane.jpg.license b/_images_originals/holmen_crane.jpg.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: © Stig Nygaard
+SPDX-License-Identifier: CC-BY-2.0
diff --git a/_images_originals/installation_the_singularity.png b/_images_originals/installation_the_singularity.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:18a3fca27093aaba8c66146c7863c64c50cd790d9df8b787e48362f9892835fe
+size 11003156
diff --git a/_images_originals/installation_the_singularity.png.license b/_images_originals/installation_the_singularity.png.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: © Nirvana Studios
+SPDX-License-Identifier: CC-BY-4.0
diff --git a/_images_originals/noise_tower.png b/_images_originals/noise_tower.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3e2773ec05a54ced839f07253334acba74e9312f713d8ed17e67403b632483d1
+size 5345115
diff --git a/_images_originals/noise_tower.png.license b/_images_originals/noise_tower.png.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: © Austin Design
+SPDX-License-Identifier: CC-BY-SA-2.0
diff --git a/images/demolition_pigeon.jpg b/images/demolition_pigeon.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1d61d8bec48a612b31426e1c051859b47b4cc3c7c8d3b68057bdb5615164d06a
+size 166110
diff --git a/images/demolition_pigeon.jpg.license b/images/demolition_pigeon.jpg.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: © Adam Lusch
+SPDX-License-Identifier: CC-BY-SA-2.0
diff --git a/images/gate.jpg b/images/gate.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1195cabfa64dcb3defb49597516687c48867e3450a001c38f39d806328bf8d16
+size 212236
diff --git a/images/gate.jpg.license b/images/gate.jpg.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: © Brendan J
+SPDX-License-Identifier: CC-BY-2.0
diff --git a/images/holmen_crane.jpg b/images/holmen_crane.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d278785d97870ba462b90a9e81891b058874e562f4309e2b4d8b9a0469efa864
+size 249901
diff --git a/images/holmen_crane.jpg.license b/images/holmen_crane.jpg.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: © Stig Nygaard
+SPDX-License-Identifier: CC-BY-2.0
diff --git a/images/installation_the_singularity.jpg b/images/installation_the_singularity.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b48ab5396f909de7bac6e66198706c1a06e8eac6da99ccb28ee6884c22d1204f
+size 204487
diff --git a/images/installation_the_singularity.jpg.license b/images/installation_the_singularity.jpg.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: © Nirvana Studios
+SPDX-License-Identifier: CC-BY-4.0
diff --git a/images/noise_tower.jpg b/images/noise_tower.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1a19db0d3669dea39e018c101492e3f78cc19acdac7fb9aabd1c7fa0727a7917
+size 416571
diff --git a/images/noise_tower.jpg.license b/images/noise_tower.jpg.license
@@ -0,0 +1,2 @@
+SPDX-FileCopyrightText: © Austin Design
+SPDX-License-Identifier: CC-BY-SA-2.0
diff --git a/index.md b/index.md
@@ -1,5 +1,5 @@
 ---
-SPDX-FileCopyrightText: © 2024 Menacit AB <foss@menacit.se>
+SPDX-FileCopyrightText: © 2026 Menacit AB <foss@menacit.se>
 SPDX-License-Identifier: CC-BY-SA-4.0
 
 title: "HTTP explained"
@@ -654,7 +654,7 @@ Let's jump into Menacit's
 -->
 
 ---
-<!-- _footer: "%ATTRIBUTION_PREFIX% Rod Waddington (CC BY-SA 2.0)" -->
+<!-- _footer: "%ATTRIBUTION_PREFIX% Stig Nygaard (CC BY 2.0)" -->
 ## HTTP proxies
 An HTTP proxy is a piece of
 software acting as both a
@@ -665,24 +665,50 @@ Can be used to filter,
 redirect and manipulate
 HTTP requests from clients.  
 
-![bg right:30%](images/green_cabling.jpg)
+![bg right:30%](images/holmen_crane.jpg)
 
 <!--
 -->
 
 ---
-<!-- _footer: "%ATTRIBUTION_PREFIX% Rod Waddington (CC BY-SA 2.0)" -->
+<!-- _footer: "%ATTRIBUTION_PREFIX% Brendan J (CC BY 2.0)" -->
 ## Forward proxies
 Commonly used to restrict
 egress communication on a network
 or provide some client anonymity.
 
+> A HTTP request reaches the forward proxy.
+> If the host header contains "example.com",
+> the proxy sends a HTTP request to
+> "example.com" and returns its
+> response to the client.
+
+_(may log requests, return status code 403
+for disallowed host names and similar)_
+
+![bg right:30%](images/gate.jpg)
+
+<!--
+-->
+
+---
+<!-- _footer: "%ATTRIBUTION_PREFIX% Austin Design (CC BY-SA 2.0)" -->
 ## Reverse proxies
-Commonly used to restrict or
-redirect client requests (ingress)
-to one or more servers.
+Commonly used to restrict or redirect client
+requests (ingress) to another HTTP server.
 
-![bg right:30%](images/green_cabling.jpg)
+> A HTTP request reaches the reverse proxy.
+>
+> If the URL path begins with "/contact",
+> the reverse proxy sends a HTTP request
+> to "w1.int.example.com" and returns
+> its response to the client.
+>
+> Otherwise, the reverse proxy sends a
+> HTTP request to "w2.int.example.com"
+> and returns its response to the client.
+
+![bg right:30%](images/noise_tower.jpg)
 
 <!--
 -->
@@ -706,6 +732,30 @@ reverse proxies are load balancers.
 <!--
 -->
 
+---
+<!-- _footer: "%ATTRIBUTION_PREFIX% Rod Waddington (CC BY-SA 2.0)" -->
+> A HTTP request reaches the load balancer.
+> 
+> If the host header contains "example.com",
+> the load balancer sends a HTTP request to
+> either "w1.example.com" or "w2.example.com"
+> (depending on their load/availability)
+> and returns its response to the client.
+
+![bg right:30%](images/green_cabling.jpg)
+
+<!--
+-->
+
+---
+<!-- _footer: "%ATTRIBUTION_PREFIX% Adam Lusch (CC BY-SA 2.0)" -->
+What happened after HTTP version 1.1?
+
+![bg right:30%](images/demolition_pigeon.jpg)
+
+<!--
+-->
+
 ---
 <!-- _footer: "%ATTRIBUTION_PREFIX% Thierry Ehrmann (CC BY 2.0)" -->
 ## HTTP version 2
@@ -746,6 +796,18 @@ further performance improvements.
 <!--
 -->
 
+---
+<!-- _footer: "%ATTRIBUTION_PREFIX% Nirvana Studios (CC BY 4.0)" -->
+We haven't yet talked about cookies,
+WebSockets and other exciting things!
+
+...but that's a story for another day.
+
+![bg right:30%](images/installation_the_singularity.jpg)
+
+<!--
+-->
+
 ---
 For copy-pasteable
 speaker notes, example code

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+SPDX-FileCopyrightText: © Adam Lusch`
	`2`	`+SPDX-License-Identifier: CC-BY-SA-2.0`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+SPDX-FileCopyrightText: © Brendan J`
	`2`	`+SPDX-License-Identifier: CC-BY-2.0`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+SPDX-FileCopyrightText: © Stig Nygaard`
	`2`	`+SPDX-License-Identifier: CC-BY-2.0`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+SPDX-FileCopyrightText: © Nirvana Studios`
	`2`	`+SPDX-License-Identifier: CC-BY-4.0`