Merge branch 'origin/main'

* feat: replace stackoverflow and exchange links

* fix: replace stackoverflow.com links with path

* feat: run stack overflow link replacer on process

* feat: process HTML on comment text

.air.toml

@@ -0,0 +1,44 @@
+root = "."
+testdata_dir = "testdata"
+tmp_dir = "tmp"
+
+[build]
+  args_bin = []
+  bin = "./tmp/main"
+  cmd = "go build -o ./tmp/main ."
+  delay = 0
+  exclude_dir = ["assets", "tmp", "vendor", "testdata"]
+  exclude_file = []
+  exclude_regex = ["_test.go"]
+  exclude_unchanged = false
+  follow_symlink = false
+  full_bin = ""
+  include_dir = []
+  include_ext = ["go", "tpl", "tmpl", "html"]
+  include_file = []
+  kill_delay = "0s"
+  log = "build-errors.log"
+  poll = false
+  poll_interval = 0
+  rerun = false
+  rerun_delay = 500
+  send_interrupt = false
+  stop_on_error = true
+
+[color]
+  app = ""
+  build = "yellow"
+  main = "magenta"
+  runner = "green"
+  watcher = "cyan"
+
+[log]
+  main_only = false
+  time = false
+
+[misc]
+  clean_on_exit = false
+
+[screen]
+  clear_on_rebuild = false
+  keep_scroll = true

.github/workflows/docker-image.yml

@@ -0,0 +1,47 @@
+name: Create and publish a Docker image
+
+# Configures this workflow to run every time a change is pushed to the branch called `release`.
+on:
+    push:
+        branches: ['release']
+
+# Defines two custom environment variables for the workflow. These are used for the Container registry domain, and a name for the Docker image that this workflow builds.
+env:
+    REGISTRY: ghcr.io
+    IMAGE_NAME: ${{ github.repository }}
+
+# There is a single job in this workflow. It's configured to run on the latest available version of Ubuntu.
+jobs:
+    build-and-push-image:
+        runs-on: ubuntu-latest
+        # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
+        permissions:
+            contents: read
+            packages: write
+            #
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v4
+            # Uses the `docker/login-action` action to log in to the Container registry registry using the account and password that will publish the packages. Once published, the packages are scoped to the account defined here.
+            - name: Log in to the Container registry
+              uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+            # This step uses [docker/metadata-action](https://github.com/docker/metadata-action#about) to extract tags and labels that will be applied to the specified image. The `id` "meta" allows the output of this step to be referenced in a subsequent step. The `images` value provides the base name for the tags and labels.
+            - name: Extract metadata (tags, labels) for Docker
+              id: meta
+              uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+              with:
+                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+            # This step uses the `docker/build-push-action` action to build the image, based on your repository's `Dockerfile`. If the build succeeds, it pushes the image to GitHub Packages.
+            # It uses the `context` parameter to define the build's context as the set of files located in the specified path. For more information, see "[Usage](https://github.com/docker/build-push-action#usage)" in the README of the `docker/build-push-action` repository.
+            # It uses the `tags` and `labels` parameters to tag and label the image with the output from the "meta" step.
+            - name: Build and push Docker image
+              uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+              with:
+                  context: .
+                  push: true
+                  tags: ${{ steps.meta.outputs.tags }}
+                  labels: ${{ steps.meta.outputs.labels }}

.gitignore

@@ -1,4 +1,5 @@
 .env
 docker-compose.yml
 .DS_Store
-*bin
+*bin
+/tmp

.prettierrc

@@ -0,0 +1,6 @@
+{
+    "trailingComma": "es5",
+    "tabWidth": 4,
+    "semi": false,
+    "singleQuote": true
+}

Dockerfile

@@ -1,19 +1,24 @@
-FROM golang:1.18-alpine
-
-RUN apk add musl-dev
-RUN apk add libc-dev
-RUN apk add gcc
+FROM golang:1.19-alpine as build
 
 WORKDIR /app
 
-COPY go.mod ./
-COPY go.sum ./
+COPY go.mod .
+COPY go.sum .
 
 RUN go mod download
 
-COPY ./ /app
+COPY . .
 
-RUN go build -o /anonymousoverflow
+ENV CGO_ENABLED=0
+
+RUN go build -o anonymousoverflow
+
+FROM scratch
+
+COPY --from=build /app/anonymousoverflow /anonymousoverflow
+COPY templates /templates
+COPY public /public
+COPY --from=build /etc/ssl/certs /etc/ssl/certs
 
 EXPOSE 8080
 

README.md

@@ -14,25 +14,42 @@ This project is super lightweight by design. The UI is simple and the frontend i
 
 ## Clearnet Instances
 
-| Instance URL                                                                    | Region                  | Notes                                                                                            |
-| ------------------------------------------------------------------------------- | ----------------------- | ------------------------------------------------------------------------------------------------ |
-| [code.whatever.social](https://code.whatever.social)                            | United States & The Netherlands | Operated by [Whatever Social](https://whatever.social) and [http.james](https://httpjames.space) |
-| [overflow.777.tf](https://overflow.777.tf/)                                     | The Netherlands         | Operated by [Jae](https://777.tf)                                                                |
-| [ao.vern.cc](https://ao.vern.cc)                                                | United States           | Operated by [vern.cc](https://vern.cc)                                                           |
-| [overflow.smnz.de](https://overflow.smnz.de)                                    | Germany                 | Operated by [smnz.de](https://smnz.de)                                                           |
-| [anonymousoverflow.esmailelbob.xyz](https://anonymousoverflow.esmailelbob.xyz/) | Canada                  | Operated by [Esmail EL BoB](https://esmailelbob.xyz)                                             |
-| [overflow.lunar.icu](https://overflow.lunar.icu)                                | Germany                 | Operated by [lunar.icu](https://lunar.icu/)                                                      |
-| [overflow.adminforge.de](https://overflow.adminforge.de/)                       | Germany                 | Operated by [adminForge](https://adminforge.de/)                                                 |
-| [ao.foss.wtf](https://ao.foss.wtf)                                              | Germany                 | Operated by [foss.wtf](https://foss.wtf)                                                         |
-| [overflow.hostux.net](https://overflow.hostux.net/)                             | France                  | Operated by [Hostux](https://hostux.net/)                                                        |
+| Instance URL                                                                              | Region                          | Notes                                                                                            |
+| ----------------------------------------------------------------------------------------- | ------------------------------- | ------------------------------------------------------------------------------------------------ |
+| [code.whatever.social](https://code.whatever.social)                                      | United States & The Netherlands | Operated by [Whatever Social](https://whatever.social) and [http.james](https://httpjames.space) |
+| [ao.vern.cc](https://ao.vern.cc)                                                          | United States                   | Operated by [vern.cc](https://vern.cc)                                                           |
+| [overflow.smnz.de](https://overflow.smnz.de)                                              | Germany                         | Operated by [smnz.de](https://smnz.de)                                                           |
+| [overflow.lunar.icu](https://overflow.lunar.icu)                                          | Germany                         | Operated by [lunar.icu](https://lunar.icu/)                                                      |
+| [overflow.adminforge.de](https://overflow.adminforge.de/)                                 | Germany                         | Operated by [adminForge](https://adminforge.de/)                                                 |
+| [overflow.hostux.net](https://overflow.hostux.net/)                                       | France                          | Operated by [Hostux](https://hostux.net/)                                                        |
+| [overflow.projectsegfau.lt](https://overflow.projectsegfau.lt/)                           | United States, France, India    | Operated by [Project Segfault](https://projectsegfau.lt/)                                        |
+| [code.xbdm.fun](https://code.xbdm.fun)                                                    | Germany                         | Operated by [xbdm.fun](https://xbdm.fun)                                                         |
+| [overflow.fascinated.cc](https://overflow.fascinated.cc/)                                 | Germany                         | Operated by [fascinated.cc](https://fascinated.cc/)                                              |
+| [ao.bloatcat.tk](https://ao.bloatcat.tk)                                                  | Iceland                         | Operated by [bloatcat.tk](https://bloatcat.tk)                                                   |
+| [anonoverflow.frontendfriendly.xyz](https://anonoverflow.frontendfriendly.xyz/)           | United States                   | Operated by [frontendfriendly.xyz](https://frontendfriendly.xyz/)                                |
+| [ao.owo.si](https://ao.owo.si/)                                                           | Germany                         | Operated by [owo.si](https://owo.si/)                                                            |
+| [overflow.datura.network](https://overflow.datura.network/)                               | Germany                         | Operated by [datura.network](https://datura.network)                                             |
+| [overflow.freedit.eu](overflow.freedit.eu)                                                | United States                   | Operated by [freedit.eu](https://freedit.eu)                                                     |
+| [ao.ftw.lol](https://ao.ftw.lol)                                                          | Germany                         | Operated by [ftw.lol](https://ftw.lol)                                                           |
+| [anonoverflow.hyperreal.coffee](https://anonoverflow.hyperreal.coffee)                    | United States                   | Operated by [hyperreal.coffee](https://hyperreal.coffee)                                         |
+| [a.opnxng.com](a.opnxng.com)                                                              | Singapore                       | Operated by [opnxng.com](https://about.opnxng.com)                                               |
+| [overflow.sudovanilla.com](https://overflow.sudovanilla.com)                              | United States                   | Operated by [SudoVanilla](https://sudovanilla.com)                                               |
+| [anonymousoverflow.privacyfucking.rocks](https://anonymousoverflow.privacyfucking.rocks/) | Germany                         | Operated by [privacyfucking.rocks](https://privacyfucking.rocks)                                 |
+| [exchange.seitan-ayoub.lol](https://exchange.seitan-ayoub.lol)                            | Germany                         | Operated by [Seitan Ayoub](https://seitan-ayoub.lol)                                             |
+| [overflow.r4fo.com](https://overflow.r4fo.com)                                            | The Netherlands                 | Operated by [r4fo.com](https://r4fo.com)                                                         |
+| [overflow.ducks.party](https://overflow.ducks.party)                                      | The Netherlands                 | Operated by [ducks.party](https://ducks.party)                                                   |
+| [ao.ngn.tf](https://ao.ngn.tf)                                                            | Turkey                          | Operated by [ngn](https://ngn.tf)                                                                |
 
 ## Other Instances
 
-| Instance URL                                                                                                                                                                | Region        | Notes                                                |
-| --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------- | ---------------------------------------------------- |
-| [ao.vernccvbvyi5qhfzyqengccj7lkove6bjot2xhh5kajhwvidqafczrad.onion](http://ao.vernccvbvyi5qhfzyqengccj7lkove6bjot2xhh5kajhwvidqafczrad.onion)                               | United States | Operated by [vern.cc](https://vern.cc)               |
-| [vernmzgraj6aaoafmehupvtkkynpaa67rxcdj2kinwiy6konn6rq.b32.i2p](http://vernmzgraj6aaoafmehupvtkkynpaa67rxcdj2kinwiy6konn6rq.b32.i2p)                                         | United States | Operated by [vern.cc](https://vern.cc)               |
-| [anonymousoverflow.esmail5pdn24shtvieloeedh7ehz3nrwcdivnfhfcedl7gf4kwddhkqd.onion](http://anonymousoverflow.esmail5pdn24shtvieloeedh7ehz3nrwcdivnfhfcedl7gf4kwddhkqd.onion) | Canada        | Operated by [Esmail EL BoB](https://esmailelbob.xyz) |
+| Instance URL                                                                                                                                               | Region        | Notes                                                     |
+| ---------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------- | --------------------------------------------------------- |
+| [ao.vernccvbvyi5qhfzyqengccj7lkove6bjot2xhh5kajhwvidqafczrad.onion](http://ao.vernccvbvyi5qhfzyqengccj7lkove6bjot2xhh5kajhwvidqafczrad.onion)              | United States | Operated by [vern.cc](https://vern.cc)                    |
+| [vernmzgraj6aaoafmehupvtkkynpaa67rxcdj2kinwiy6konn6rq.b32.i2p](http://vernmzgraj6aaoafmehupvtkkynpaa67rxcdj2kinwiy6konn6rq.b32.i2p)                        | United States | Operated by [vern.cc](https://vern.cc)                    |
+| [overflow.pjsfkvpxlinjamtawaksbnnaqs2fc2mtvmozrzckxh7f3kis6yea25ad.onion](http://overflow.pjsfkvpxlinjamtawaksbnnaqs2fc2mtvmozrzckxh7f3kis6yea25ad.onion/) | Luxembourg    | Operated by [Project Segfault](https://projectsegfau.lt/) |
+| [overflow.daturab6drmkhyeia4ch5gvfc2f3wgo6bhjrv3pz6n7kxmvoznlkq4yd.onion](http://overflow.daturab6drmkhyeia4ch5gvfc2f3wgo6bhjrv3pz6n7kxmvoznlkq4yd.onion/) | Germany       | Operated by [datura.network](https://datura.network)      |
+| [ao.pk47sgwhncn5cgidm7bofngmh7lc7ukjdpk5bjwfemmyp27ovl25ikyd.onion](http://ao.pk47sgwhncn5cgidm7bofngmh7lc7ukjdpk5bjwfemmyp27ovl25ikyd.onion/)             | Germany       | Operated by [owo.si](https://owo.si/)                     |
+| [ay7akchgdh76r4lc62hzd52z6xqoh67loototsetvqxo5o7ngo5q.b32.i2p](http://ay7akchgdh76r4lc62hzd52z6xqoh67loototsetvqxo5o7ngo5q.b32.i2p/)                       | Germany       | Operated by [owo.si](https://owo.si/)                     |
 
 ## Why use AnonymousOverflow over StackOverflow?
 
@@ -59,7 +76,9 @@ StackOverflow has a cluttered UI that might distract you from the content you're
 
 ## How to make Stack Overflow links take you to AnonymousOverflow automatically
 
-The open-source [Libredirect](https://github.com/libredirect/libredirect) extension for Firefox and Chromium-based desktop browsers has support for redirections to AnonymousOverflow. To enable this, simply open the extension settings, click on Stack Overflow, then toggle "Enable". That's it, now Stack Overflow links go to AnonymousOverflow.
+The open-source [Libredirect](https://github.com/libredirect/libredirect) extension for Firefox and Chromium-based desktop browsers has support for redirections to AnonymousOverflow. To enable this, simply open the extension settings, click on Stack Overflow, then toggle "Enable". That's it, now Stack Overflow links will go to AnonymousOverflow.
+
+The open-source [FREEdirector](https://openuserjs.org/scripts/sjehuda/FREEdirector) user.js script for web browsers with userscript support. You can install it with a web extension like [Greasemonkey](https://greasespot.net/), [Tampermonkey](https://tampermonkey.net/) or [Violentmonkey](https://violentmonkey.github.io/). Once installed, Stack Overflow links will go to AnonymousOverflow.
 
 ## How it works
 
@@ -85,8 +104,8 @@ You can easily convert StackOverflow URLs to AnonymousOverflow ones by adding th
 javascript: (function () {
     window.location = window.location
         .toString()
-        .replace(/stackoverflow\.com/, "code.whatever.social");
-})();
+        .replace(/stackoverflow\.com/, 'code.whatever.social')
+})()
 ```
 
 Replace `code.whatever.social` with the domain name of the instance you're using if needed.
@@ -106,3 +125,4 @@ Read the [wiki page](https://github.com/httpjamesm/AnonymousOverflow/wiki/Deploy
 -   [goquery](https://github.com/PuerkitoBio/goquery) under the [BSD 3-Clause License](https://github.com/PuerkitoBio/goquery/blob/master/LICENSE)
 -   [resty](https://github.com/go-resty/resty) under the [MIT License](https://github.com/go-resty/resty/blob/master/LICENSE)
 -   [Chroma](https://github.com/alecthomas/chroma) under the [MIT License](https://github.com/alecthomas/chroma/blob/master/COPYING)
+-   [KaTeX](https://github.com/KaTeX/KaTeX) under the [MIT License](https://github.com/KaTeX/KaTeX/blob/main/LICENSE)

config/version.go

@@ -1,3 +1,3 @@
 package config
 
-var Version = "1.8.1"
+var Version = "1.11.0"

docker-compose.example.yml

@@ -1,14 +1,12 @@
 version: '3'
 
 services:
-  anonymousoverflow:
-    container_name: 'app'
-    build:
-      context: .
-      network: 'host'
-    environment:
-      - APP_URL=https://domain.com
-      - JWT_SIGNING_SECRET=secret
-    ports:
-      - '80:8080'
-    restart: 'always'
+    anonymousoverflow:
+        container_name: 'app'
+        image: 'ghcr.io/httpjamesm/anonymousoverflow:release'
+        environment:
+            - APP_URL=https://domain.com
+            - JWT_SIGNING_SECRET=secret
+        ports:
+            - '80:8080'
+        restart: 'always'

go.mod

@@ -7,29 +7,33 @@ require (
 	github.com/alecthomas/chroma v0.10.0
 	github.com/gin-gonic/gin v1.8.2
 	github.com/go-resty/resty/v2 v2.7.0
+	github.com/golang-jwt/jwt/v4 v4.4.3
+	github.com/joho/godotenv v1.4.0
 )
 
 require (
 	github.com/andybalholm/cascadia v1.3.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dlclark/regexp2 v1.7.0 // indirect
 	github.com/gin-contrib/sse v0.1.0 // indirect
 	github.com/go-playground/locales v0.14.0 // indirect
 	github.com/go-playground/universal-translator v0.18.0 // indirect
 	github.com/go-playground/validator/v10 v10.11.1 // indirect
 	github.com/goccy/go-json v0.10.0 // indirect
-	github.com/golang-jwt/jwt/v4 v4.4.3 // indirect
-	github.com/joho/godotenv v1.4.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/leodido/go-urn v1.2.1 // indirect
 	github.com/mattn/go-isatty v0.0.16 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.9.0 // indirect
 	github.com/ugorji/go/codec v1.2.8 // indirect
 	golang.org/x/crypto v0.4.0 // indirect
-	golang.org/x/net v0.4.0 // indirect
-	golang.org/x/sys v0.3.0 // indirect
-	golang.org/x/text v0.5.0 // indirect
+	golang.org/x/net v0.7.0 // indirect
+	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/text v0.7.0 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -72,6 +72,8 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/ugorji/go/codec v1.2.8 h1:sgBJS6COt0b/P40VouWKdseidkDgHxYGm0SAglUHfP0=
 github.com/ugorji/go/codec v1.2.8/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
 golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
@@ -80,20 +82,20 @@ golang.org/x/crypto v0.4.0/go.mod h1:3quD/ATkf6oY+rnes5c3ExXTbLc8mueNue5/DoinL80
 golang.org/x/net v0.0.0-20210916014120-12bc252f5db8/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211029224645-99673261e6eb/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.4.0 h1:Q5QPcMlvfxFTAPV0+07Xz/MpK9NTXu2VDUuy0FeMfaU=
-golang.org/x/net v0.4.0/go.mod h1:MBQ8lrhLObU/6UmLb4fmbmk5OcyYmqtbGd/9yIeKjEE=
+golang.org/x/net v0.7.0 h1:rJrUqqhjsgNp7KqAIc25s9pZnjU7TUcSY7HcVZjdn1g=
+golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.3.0 h1:w8ZOecv6NaNa/zC8944JTU3vz4u6Lagfk4RPQxv92NQ=
-golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.5.0 h1:OLmvp0KP+FVG99Ct/qFiL/Fhk4zp4QQnZ7b2U+5piUM=
-golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.7.0 h1:4BRB4x83lYWy72KwLD/qYDuTu7q9PjSagHvijDw7cLo=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

main.go

@@ -50,6 +50,10 @@ func main() {
 	r.GET("/", routes.GetHome)
 	r.POST("/", routes.PostHome)
 
+	r.GET("/a/:id", routes.RedirectShortenedOverflowURL)
+	r.GET("/q/:id", routes.RedirectShortenedOverflowURL)
+	r.GET("/q/:id/:answerId", routes.RedirectShortenedOverflowURL)
+
 	r.GET("/questions/:id", func(c *gin.Context) {
 		// redirect user to the question with the title
 		c.Redirect(302, fmt.Sprintf("/questions/%s/placeholder", c.Param("id")))

public/globals.css

@@ -10,7 +10,7 @@
     --link-color: #92adff;
 }
 
-[data-theme="light"] {
+[data-theme='light'] {
     --main-bg: rgb(219, 219, 219);
     --text-color: #000;
     --muted-text-color: #636363;
@@ -26,7 +26,6 @@ a {
     color: var(--link-color);
 }
 
-
 html {
     margin: 0;
     padding: 0;
@@ -45,9 +44,21 @@ html {
 .icon img {
     background: white;
     border-radius: 50%;
-    padding: .25rem;
+    padding: 0.25rem;
 }
 
 details {
     cursor: pointer;
-}
+}
+
+.d-flex {
+    display: flex;
+}
+
+.fd-column {
+    flex-direction: column;
+}
+
+.fw-nowrap {
+    flex-wrap: nowrap;
+}

public/katex/README.md

@@ -0,0 +1,125 @@
+<h1><a href="https://katex.org/">
+  <picture>
+    <source media="(prefers-color-scheme: dark)" srcset="https://katex.org/img/katex-logo.svg">
+    <img alt="KaTeX" width=130 src="https://katex.org/img/katex-logo-black.svg">
+  </picture>
+</a></h1>
+
+[![npm](https://img.shields.io/npm/v/katex.svg)](https://www.npmjs.com/package/katex)
+[![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
+[![CI](https://github.com/KaTeX/KaTeX/workflows/CI/badge.svg?branch=main&event=push)](https://github.com/KaTeX/KaTeX/actions?query=workflow%3ACI)
+[![codecov](https://codecov.io/gh/KaTeX/KaTeX/branch/main/graph/badge.svg)](https://codecov.io/gh/KaTeX/KaTeX)
+[![Discussions](https://img.shields.io/badge/Discussions-join-brightgreen)](https://github.com/KaTeX/KaTeX/discussions)
+[![jsDelivr](https://data.jsdelivr.com/v1/package/npm/katex/badge?style=rounded)](https://www.jsdelivr.com/package/npm/katex)
+![katex.min.js size](https://img.badgesize.io/https://unpkg.com/katex/dist/katex.min.js?compression=gzip)
+[![Gitpod ready-to-code](https://img.shields.io/badge/Gitpod-ready--to--code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/KaTeX/KaTeX)
+[![Financial Contributors on Open Collective](https://opencollective.com/katex/all/badge.svg?label=financial+contributors)](https://opencollective.com/katex)
+
+KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web.
+
+ * **Fast:** KaTeX renders its math synchronously and doesn't need to reflow the page. See how it compares to a competitor in [this speed test](https://www.intmath.com/cg5/katex-mathjax-comparison.php).
+ * **Print quality:** KaTeX's layout is based on Donald Knuth's TeX, the gold standard for math typesetting.
+ * **Self contained:** KaTeX has no dependencies and can easily be bundled with your website resources.
+ * **Server side rendering:** KaTeX produces the same output regardless of browser or environment, so you can pre-render expressions using Node.js and send them as plain HTML.
+
+KaTeX is compatible with all major browsers, including Chrome, Safari, Firefox, Opera, Edge, and IE 11.
+
+KaTeX supports much (but not all) of LaTeX and many LaTeX packages. See the [list of supported functions](https://katex.org/docs/supported.html).
+
+Try out KaTeX [on the demo page](https://katex.org/#demo)!
+
+## Getting started
+
+### Starter template
+
+```html
+<!DOCTYPE html>
+<!-- KaTeX requires the use of the HTML5 doctype. Without it, KaTeX may not render properly -->
+<html>
+  <head>
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.16.8/dist/katex.min.css" integrity="sha384-GvrOXuhMATgEsSwCs4smul74iXGOixntILdUW9XmUC6+HX0sLNAK3q71HotJqlAn" crossorigin="anonymous">
+
+    <!-- The loading of KaTeX is deferred to speed up page rendering -->
+    <script defer src="https://cdn.jsdelivr.net/npm/katex@0.16.8/dist/katex.min.js" integrity="sha384-cpW21h6RZv/phavutF+AuVYrr+dA8xD9zs6FwLpaCct6O9ctzYFfFr4dgmgccOTx" crossorigin="anonymous"></script>
+
+    <!-- To automatically render math in text elements, include the auto-render extension: -->
+    <script defer src="https://cdn.jsdelivr.net/npm/katex@0.16.8/dist/contrib/auto-render.min.js" integrity="sha384-+VBxd3r6XgURycqtZ117nYw44OOcIax56Z4dCRWbxyPt0Koah1uHoK0o4+/RRE05" crossorigin="anonymous"
+        onload="renderMathInElement(document.body);"></script>
+  </head>
+  ...
+</html>
+```
+
+You can also [download KaTeX](https://github.com/KaTeX/KaTeX/releases) and host it yourself.
+
+For details on how to configure auto-render extension, refer to [the documentation](https://katex.org/docs/autorender.html).
+
+### API
+
+Call `katex.render` to render a TeX expression directly into a DOM element.
+For example:
+
+```js
+katex.render("c = \\pm\\sqrt{a^2 + b^2}", element, {
+    throwOnError: false
+});
+```
+
+Call `katex.renderToString` to generate an HTML string of the rendered math,
+e.g., for server-side rendering.  For example:
+
+```js
+var html = katex.renderToString("c = \\pm\\sqrt{a^2 + b^2}", {
+    throwOnError: false
+});
+// '<span class="katex">...</span>'
+```
+
+Make sure to include the CSS and font files in both cases.
+If you are doing all rendering on the server, there is no need to include the
+JavaScript on the client.
+
+The examples above use the `throwOnError: false` option, which renders invalid
+inputs as the TeX source code in red (by default), with the error message as
+hover text.  For other available options, see the
+[API documentation](https://katex.org/docs/api.html),
+[options documentation](https://katex.org/docs/options.html), and
+[handling errors documentation](https://katex.org/docs/error.html).
+
+## Demo and Documentation
+
+Learn more about using KaTeX [on the website](https://katex.org)!
+
+## Contributors
+
+### Code Contributors
+
+This project exists thanks to all the people who contribute code. If you'd like to help, see [our guide to contributing code](CONTRIBUTING.md).
+<a href="https://github.com/KaTeX/KaTeX/graphs/contributors"><img src="https://contributors-svg.opencollective.com/katex/contributors.svg?width=890&button=false" alt="Code contributors" /></a>
+
+### Financial Contributors
+
+Become a financial contributor and help us sustain our community.
+
+#### Individuals
+
+<a href="https://opencollective.com/katex"><img src="https://opencollective.com/katex/individuals.svg?width=890" alt="Contribute on Open Collective"></a>
+
+#### Organizations
+
+Support this project with your organization. Your logo will show up here with a link to your website.
+
+<a href="https://opencollective.com/katex/organization/0/website"><img src="https://opencollective.com/katex/organization/0/avatar.svg" alt="Organization 1"></a>
+<a href="https://opencollective.com/katex/organization/1/website"><img src="https://opencollective.com/katex/organization/1/avatar.svg" alt="Organization 2"></a>
+<a href="https://opencollective.com/katex/organization/2/website"><img src="https://opencollective.com/katex/organization/2/avatar.svg" alt="Organization 3"></a>
+<a href="https://opencollective.com/katex/organization/3/website"><img src="https://opencollective.com/katex/organization/3/avatar.svg" alt="Organization 4"></a>
+<a href="https://opencollective.com/katex/organization/4/website"><img src="https://opencollective.com/katex/organization/4/avatar.svg" alt="Organization 5"></a>
+<a href="https://opencollective.com/katex/organization/5/website"><img src="https://opencollective.com/katex/organization/5/avatar.svg" alt="Organization 6"></a>
+<a href="https://opencollective.com/katex/organization/6/website"><img src="https://opencollective.com/katex/organization/6/avatar.svg" alt="Organization 7"></a>
+<a href="https://opencollective.com/katex/organization/7/website"><img src="https://opencollective.com/katex/organization/7/avatar.svg" alt="Organization 8"></a>
+<a href="https://opencollective.com/katex/organization/8/website"><img src="https://opencollective.com/katex/organization/8/avatar.svg" alt="Organization 9"></a>
+<a href="https://opencollective.com/katex/organization/9/website"><img src="https://opencollective.com/katex/organization/9/avatar.svg" alt="Organization 10"></a>
+
+## License
+
+KaTeX is licensed under the [MIT License](https://opensource.org/licenses/MIT).

public/katex/contrib/auto-render.min.js

@@ -0,0 +1 @@
+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t(require("katex")):"function"==typeof define&&define.amd?define(["katex"],t):"object"==typeof exports?exports.renderMathInElement=t(require("katex")):e.renderMathInElement=t(e.katex)}("undefined"!=typeof self?self:this,(function(e){return function(){"use strict";var t={771:function(t){t.exports=e}},r={};function n(e){var i=r[e];if(void 0!==i)return i.exports;var a=r[e]={exports:{}};return t[e](a,a.exports,n),a.exports}n.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(t,{a:t}),t},n.d=function(e,t){for(var r in t)n.o(t,r)&&!n.o(e,r)&&Object.defineProperty(e,r,{enumerable:!0,get:t[r]})},n.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)};var i={};return function(){n.d(i,{default:function(){return s}});var e=n(771),t=n.n(e),r=function(e,t,r){for(var n=r,i=0,a=e.length;n<t.length;){var o=t[n];if(i<=0&&t.slice(n,n+a)===e)return n;"\\"===o?n++:"{"===o?i++:"}"===o&&i--,n++}return-1},a=/^\\begin{/,o=function(e,t){for(var n,i=[],o=new RegExp("("+t.map((function(e){return e.left.replace(/[-/\\^$*+?.()|[\]{}]/g,"\\$&")})).join("|")+")");-1!==(n=e.search(o));){n>0&&(i.push({type:"text",data:e.slice(0,n)}),e=e.slice(n));var l=t.findIndex((function(t){return e.startsWith(t.left)}));if(-1===(n=r(t[l].right,e,t[l].left.length)))break;var d=e.slice(0,n+t[l].right.length),s=a.test(d)?d:e.slice(t[l].left.length,n);i.push({type:"math",data:s,rawData:d,display:t[l].display}),e=e.slice(n+t[l].right.length)}return""!==e&&i.push({type:"text",data:e}),i},l=function(e,r){var n=o(e,r.delimiters);if(1===n.length&&"text"===n[0].type)return null;for(var i=document.createDocumentFragment(),a=0;a<n.length;a++)if("text"===n[a].type)i.appendChild(document.createTextNode(n[a].data));else{var l=document.createElement("span"),d=n[a].data;r.displayMode=n[a].display;try{r.preProcess&&(d=r.preProcess(d)),t().render(d,l,r)}catch(e){if(!(e instanceof t().ParseError))throw e;r.errorCallback("KaTeX auto-render: Failed to parse `"+n[a].data+"` with ",e),i.appendChild(document.createTextNode(n[a].rawData));continue}i.appendChild(l)}return i},d=function e(t,r){for(var n=0;n<t.childNodes.length;n++){var i=t.childNodes[n];if(3===i.nodeType){for(var a=i.textContent,o=i.nextSibling,d=0;o&&o.nodeType===Node.TEXT_NODE;)a+=o.textContent,o=o.nextSibling,d++;var s=l(a,r);if(s){for(var f=0;f<d;f++)i.nextSibling.remove();n+=s.childNodes.length-1,t.replaceChild(s,i)}else n+=d}else 1===i.nodeType&&function(){var t=" "+i.className+" ";-1===r.ignoredTags.indexOf(i.nodeName.toLowerCase())&&r.ignoredClasses.every((function(e){return-1===t.indexOf(" "+e+" ")}))&&e(i,r)}()}},s=function(e,t){if(!e)throw new Error("No element provided to render");var r={};for(var n in t)t.hasOwnProperty(n)&&(r[n]=t[n]);r.delimiters=r.delimiters||[{left:"$$",right:"$$",display:!0},{left:"\\(",right:"\\)",display:!1},{left:"\\begin{equation}",right:"\\end{equation}",display:!0},{left:"\\begin{align}",right:"\\end{align}",display:!0},{left:"\\begin{alignat}",right:"\\end{alignat}",display:!0},{left:"\\begin{gather}",right:"\\end{gather}",display:!0},{left:"\\begin{CD}",right:"\\end{CD}",display:!0},{left:"\\[",right:"\\]",display:!0}],r.ignoredTags=r.ignoredTags||["script","noscript","style","textarea","pre","code","option"],r.ignoredClasses=r.ignoredClasses||[],r.errorCallback=r.errorCallback||console.error,r.macros=r.macros||{},d(e,r)}}(),i=i.default}()}));

public/question.css

@@ -19,9 +19,17 @@ body {
     box-sizing: border-box;
 }
 
-.parent {
-    max-width: 90%;
-    width: fit-content;
+@media (orientation: landscape) {
+    .parent {
+        max-width: 50%;
+        width: fit-content;
+    }
+}
+@media (orientation: portrait) {
+    .parent {
+        max-width: 90%;
+        width: fit-content;
+    }
 }
 
 .header {
@@ -31,7 +39,7 @@ body {
 
 .card-tags {
     display: flex;
-    gap: .5rem;
+    gap: 0.5rem;
 }
 
 .card-tags .tag {
@@ -94,7 +102,7 @@ img {
     margin-bottom: 1rem;
     background-color: var(--meta-bg);
     color: var(--text-color);
-    
+
     display: flex;
     justify-content: space-between;
     align-items: center;
@@ -140,6 +148,18 @@ img {
     margin-bottom: 1rem;
 }
 
+.s-notice .d-flex {
+    display: flex;
+}
+
+.s-notice .mr8 {
+    margin-right: 1rem;
+}
+
+.s-notice svg {
+    height: 1rem;
+}
+
 .answers-header {
     display: flex;
     justify-content: space-between;

public/question.js

@@ -0,0 +1,12 @@
+const doRender = () => {
+    renderMathInElement(document.body, {
+        delimiters: [
+            { left: '$$', right: '$$', display: true },
+            { left: '\\[', right: '\\]', display: true },
+            { left: '$', right: '$', display: false },
+            { left: '\\(', right: '\\)', display: false },
+        ],
+    })
+}
+
+doRender();

src/middleware/options.go

@@ -1,6 +1,8 @@
 package middleware
 
-import "github.com/gin-gonic/gin"
+import (
+	"github.com/gin-gonic/gin"
+)
 
 func OptionsMiddleware() gin.HandlerFunc {
 	return func(c *gin.Context) {
@@ -8,23 +10,17 @@ func OptionsMiddleware() gin.HandlerFunc {
 		c.Set("theme", "dark")
 
 		imagesCookie, err := c.Cookie("disable_images")
-		if err != nil {
-			c.Next()
-			return
-		}
-
-		if imagesCookie == "true" {
-			c.Set("disable_images", true)
+		if err == nil {
+			if imagesCookie == "true" {
+				c.Set("disable_images", true)
+			}
 		}
 
 		themeCookie, err := c.Cookie("theme")
-		if err != nil {
-			c.Next()
-			return
-		}
-
-		if themeCookie == "light" {
-			c.Set("theme", "light")
+		if err == nil {
+			if themeCookie == "light" {
+				c.Set("theme", "light")
+			}
 		}
 
 		c.Next()

src/routes/home.go

@@ -35,10 +35,14 @@ func PostHome(c *gin.Context) {
 
 	soLink := body.URL
 
+	// remove the www.
+	soLink = strings.ReplaceAll(soLink, "www.", "")
+
 	// validate URL
 	isStackOverflow := strings.HasPrefix(soLink, "https://stackoverflow.com/questions/")
+	isShortenedStackOverflow := strings.HasPrefix(soLink, "https://stackoverflow.com/a/") || strings.HasPrefix(soLink, "https://stackoverflow.com/q/")
 	isStackExchange := stackExchangeRegex.MatchString(soLink)
-	if !isStackExchange && !isStackOverflow {
+	if !isStackExchange && !isStackOverflow && !isShortenedStackOverflow {
 		c.HTML(400, "home.html", gin.H{
 			"errorMessage": "Invalid stack overflow/exchange URL",
 			"theme":        c.MustGet("theme").(string),
@@ -47,7 +51,7 @@ func PostHome(c *gin.Context) {
 	}
 
 	// if stack overflow, trim https://stackoverflow.com
-	if isStackOverflow {
+	if isStackOverflow || isShortenedStackOverflow {
 		c.Redirect(302, strings.TrimPrefix(soLink, "https://stackoverflow.com"))
 		return
 	}

src/routes/options.go

@@ -30,12 +30,10 @@ func ChangeOptions(c *gin.Context) {
 		if c.MustGet("theme").(string) == "dark" {
 			text = "light"
 		}
+
 		c.SetCookie("theme", text, 60*60*24*365*10, "/", "", false, true)
 		// get redirect url from query
 		redirectUrl := c.Query("redirect_url")
-		if redirectUrl == "" {
-			redirectUrl = os.Getenv("APP_URL")
-		}
 
 		if !strings.HasPrefix(redirectUrl, os.Getenv("APP_URL")) {
 			redirectUrl = os.Getenv("APP_URL")

src/routes/question.go

@@ -29,7 +29,6 @@ var soSortValues = map[string]string{
 }
 
 func ViewQuestion(c *gin.Context) {
-	client := resty.New()
 
 	questionId := c.Param("id")
 	if _, err := strconv.Atoi(questionId); err != nil {
@@ -41,42 +40,24 @@ func ViewQuestion(c *gin.Context) {
 		return
 	}
 
-	questionTitle := c.Param("title")
-
-	sortValue := c.Query("sort_by")
-	if sortValue == "" {
-		sortValue = "votes"
+	params, err := parseAndValidateParameters(c)
+	if err != nil {
+		return
 	}
 
-	soSortValue, ok := soSortValues[sortValue]
-	if !ok {
-		soSortValue = soSortValues["votes"]
-	}
-
-	sub := c.Param("sub")
-
 	domain := "stackoverflow.com"
 
-	if sub != "" {
-		domain = fmt.Sprintf("%s.stackexchange.com", sub)
+	if params.Sub != "" {
+		domain = fmt.Sprintf("%s.stackexchange.com", params.Sub)
 	}
 
-	soLink := fmt.Sprintf("https://%s/questions/%s/%s?answertab=%s", domain, questionId, questionTitle, soSortValue)
+	soLink := fmt.Sprintf("https://%s/questions/%s/%s?answertab=%s", domain, questionId, params.QuestionTitle, params.SoSortValue)
 
-	resp, err := client.R().Get(soLink)
-	if err != nil {
-		c.HTML(500, "home.html", gin.H{
-			"errorMessage": "Unable to fetch question data",
-			"theme":        c.MustGet("theme").(string),
-			"version":      config.Version,
-		})
-		return
-	}
-	defer resp.RawResponse.Body.Close()
+	resp, err := fetchQuestionData(soLink)
 
 	if resp.StatusCode() != 200 {
 		c.HTML(500, "home.html", gin.H{
-			"errorMessage": "Received a non-OK status code",
+			"errorMessage": fmt.Sprintf("Received a non-OK status code %d", resp.StatusCode()),
 			"theme":        c.MustGet("theme").(string),
 			"version":      config.Version,
 		})
@@ -97,181 +78,25 @@ func ViewQuestion(c *gin.Context) {
 		return
 	}
 
-	newFilteredQuestion := types.FilteredQuestion{}
-
-	questionTextParent := doc.Find("h1.fs-headline1")
-
-	questionText := questionTextParent.Children().First().Text()
-
-	newFilteredQuestion.Title = questionText
-
-	questionPostLayout := doc.Find("div.post-layout").First()
-
-	questionTags := utils.GetPostTags(questionPostLayout)
-	newFilteredQuestion.Tags = questionTags
-
-	questionBodyParent := doc.Find("div.s-prose")
-
-	questionBodyParentHTML, err := questionBodyParent.Html()
+	newFilteredQuestion, err := extractQuestionData(doc, domain)
 	if err != nil {
 		c.HTML(500, "home.html", gin.H{
-			"errorMessage": "Unable to parse question body",
+			"errorMessage": "Failed to extract question data",
 			"theme":        c.MustGet("theme").(string),
 			"version":      config.Version,
 		})
 		return
 	}
 
-	newFilteredQuestion.Body = template.HTML(utils.ReplaceImgTags(questionBodyParentHTML))
-
-	questionBodyText := questionBodyParent.Text()
-
-	// remove all whitespace to create the shortened body desc
-	shortenedBody := strings.TrimSpace(questionBodyText)
-
-	// remove all newlines
-	shortenedBody = strings.ReplaceAll(shortenedBody, "\n", " ")
-
-	// get the first 50 chars
-	shortenedBody = shortenedBody[:50]
-
-	newFilteredQuestion.ShortenedBody = shortenedBody
-
-	comments := utils.FindAndReturnComments(questionBodyParentHTML, domain, questionPostLayout)
-	newFilteredQuestion.Comments = comments
-
-	// parse any code blocks and highlight them
-	answerCodeBlocks := questionCodeBlockRegex.FindAllString(questionBodyParentHTML, -1)
-	for _, codeBlock := range answerCodeBlocks {
-		codeBlock = utils.StripBlockTags(codeBlock)
-
-		// syntax highlight
-		highlightedCodeBlock := utils.HighlightSyntaxViaContent(codeBlock)
-
-		// replace the code block with the highlighted code block
-		questionBodyParentHTML = strings.Replace(questionBodyParentHTML, codeBlock, highlightedCodeBlock, 1)
-	}
-
-	questionCard := doc.Find("div.postcell")
-
-	questionMetadata := questionCard.Find("div.user-info")
-	questionTimestamp := ""
-	questionMetadata.Find("span.relativetime").Each(func(i int, s *goquery.Selection) {
-		// get the second
-		if i == 0 {
-			if s.Text() != "" {
-				// if it's not been edited, it means it's the first
-				questionTimestamp = s.Text()
-				return
-			}
-		}
-
-		// otherwise it's the second element
-		if i == 1 {
-			questionTimestamp = s.Text()
-			return
-		}
-	})
-
-	newFilteredQuestion.Timestamp = questionTimestamp
-
-	userDetails := questionMetadata.Find("div.user-details")
-
-	questionAuthor := ""
-	questionAuthorURL := fmt.Sprintf("https://%s", domain)
-
-	// check if the question has been edited
-	isQuestionEdited := false
-	questionMetadata.Find("a.js-gps-track").Each(func(i int, s *goquery.Selection) {
-		if strings.Contains(s.Text(), "edited") {
-			isQuestionEdited = true
-			return
-		}
-	})
-
-	userDetails.Find("a").Each(func(i int, s *goquery.Selection) {
-		// if question has been edited, the author is the second element.
-
-		if isQuestionEdited {
-			if i == 1 {
-				questionAuthor = s.Text()
-				questionAuthorURL += s.AttrOr("href", "")
-				return
-			}
-		} else {
-			// otherwise it's the first element
-			if i == 0 {
-				questionAuthor = s.Text()
-				questionAuthorURL += s.AttrOr("href", "")
-				return
-			}
-		}
-	})
-
-	newFilteredQuestion.AuthorName = questionAuthor
-	newFilteredQuestion.AuthorURL = questionAuthorURL
-
-	answers := []types.FilteredAnswer{}
-
-	doc.Find("div.answer").Each(func(i int, s *goquery.Selection) {
-
-		newFilteredAnswer := types.FilteredAnswer{}
-
-		postLayout := s.Find("div.post-layout")
-		voteCell := postLayout.Find("div.votecell")
-		answerCell := postLayout.Find("div.answercell")
-		answerBody := answerCell.Find("div.s-prose")
-		answerBodyHTML, _ := answerBody.Html()
-
-		voteCount := html.EscapeString(voteCell.Find("div.js-vote-count").Text())
-
-		newFilteredAnswer.Upvotes = voteCount
-		newFilteredAnswer.IsAccepted = s.HasClass("accepted-answer")
-
-		answerFooter := s.Find("div.mt24")
-
-		answerAuthorURL := fmt.Sprintf("https://%s", domain)
-		answerAuthorName := ""
-		answerTimestamp := ""
-
-		answerFooter.Find("div.post-signature").Each(func(i int, s *goquery.Selection) {
-			answerAuthorDetails := s.Find("div.user-details")
-
-			if answerAuthorDetails.Length() > 0 {
-				questionAuthor := answerAuthorDetails.Find("a").First()
-				answerAuthorName = html.EscapeString(questionAuthor.Text())
-				answerAuthorURL += html.EscapeString(questionAuthor.AttrOr("href", ""))
-			}
-
-			answerTimestamp = html.EscapeString(s.Find("span.relativetime").Text())
+	answers, err := extractAnswersData(doc, domain)
+	if err != nil {
+		c.HTML(500, "home.html", gin.H{
+			"errorMessage": "Failed to extract answer data",
+			"theme":        c.MustGet("theme").(string),
+			"version":      config.Version,
 		})
-
-		answerId, _ := s.Attr("data-answerid")
-		newFilteredAnswer.ID = answerId
-
-		newFilteredAnswer.AuthorName = answerAuthorName
-		newFilteredAnswer.AuthorURL = answerAuthorURL
-		newFilteredAnswer.Timestamp = answerTimestamp
-
-		// parse any code blocks and highlight them
-		answerCodeBlocks := codeBlockRegex.FindAllString(answerBodyHTML, -1)
-		for _, codeBlock := range answerCodeBlocks {
-			codeBlock = utils.StripBlockTags(codeBlock)
-
-			// syntax highlight
-			highlightedCodeBlock := utils.HighlightSyntaxViaContent(codeBlock)
-
-			// replace the code block with the highlighted code block
-			answerBodyHTML = strings.Replace(answerBodyHTML, codeBlock, highlightedCodeBlock, 1)
-		}
-
-		comments = utils.FindAndReturnComments(answerBodyHTML, domain, postLayout)
-
-		newFilteredAnswer.Comments = comments
-		newFilteredAnswer.Body = template.HTML(utils.ReplaceImgTags(answerBodyHTML))
-
-		answers = append(answers, newFilteredAnswer)
-	})
+		return
+	}
 
 	imagePolicy := "'self' https:"
 
@@ -284,9 +109,164 @@ func ViewQuestion(c *gin.Context) {
 		"answers":     answers,
 		"imagePolicy": imagePolicy,
 		"theme":       c.MustGet("theme").(string),
-		"currentUrl":  fmt.Sprintf("%s/questions/%s/%s", os.Getenv("APP_URL"), questionId, questionTitle),
-		"sortValue":   sortValue,
+		"currentUrl":  fmt.Sprintf("%s%s", os.Getenv("APP_URL"), c.Request.URL.Path),
+		"sortValue":   params.SoSortValue,
 		"domain":      domain,
 	})
 
 }
+
+type viewQuestionInputs struct {
+	QuestionID    string
+	QuestionTitle string
+	SoSortValue   string
+	Sub           string
+}
+
+// parseAndValidateParameters consolidates the URL and query parameters into an easily-accessible struct.
+func parseAndValidateParameters(c *gin.Context) (inputs viewQuestionInputs, err error) {
+
+	questionId := c.Param("id")
+	if _, err = strconv.Atoi(questionId); err != nil {
+		c.HTML(400, "home.html", gin.H{
+			"errorMessage": "Invalid question ID",
+			"theme":        c.MustGet("theme").(string),
+			"version":      config.Version,
+		})
+		return
+	}
+
+	inputs.QuestionID = questionId
+
+	sortValue := c.Query("sort_by")
+	if sortValue == "" {
+		sortValue = "votes"
+	}
+
+	soSortValue, ok := soSortValues[sortValue]
+	if !ok {
+		soSortValue = soSortValues["votes"]
+	}
+
+	inputs.SoSortValue = soSortValue
+
+	sub := c.Param("sub")
+
+	inputs.Sub = sub
+
+	return
+}
+
+// fetchQuestionData sends the request to StackOverflow.
+func fetchQuestionData(soLink string) (resp *resty.Response, err error) {
+	client := resty.New()
+	resp, err = client.R().Get(soLink)
+	return
+}
+
+// extractQuestionData parses the HTML document and extracts question data.
+func extractQuestionData(doc *goquery.Document, domain string) (question types.FilteredQuestion, err error) {
+	// Extract the question title.
+	questionTextParent := doc.Find("h1.fs-headline1").First()
+	question.Title = strings.TrimSpace(questionTextParent.Children().First().Text())
+
+	// Extract question tags.
+	questionTags := utils.GetPostTags(doc.Find("div.post-layout").First())
+	question.Tags = questionTags
+
+	// Extract and process the question body.
+	questionBodyParent := doc.Find("div.s-prose").First()
+	questionBodyParentHTML, err := questionBodyParent.Html()
+	if err != nil {
+		return question, err
+	}
+	question.Body = template.HTML(utils.ProcessHTMLBody(questionBodyParentHTML))
+
+	// Extract the shortened body description.
+	shortenedBody := strings.TrimSpace(questionBodyParent.Text())
+	shortenedBody = strings.ReplaceAll(shortenedBody, "\n", " ")
+	if len(shortenedBody) > 50 {
+		shortenedBody = shortenedBody[:50]
+	}
+	question.ShortenedBody = shortenedBody
+
+	// Extract question comments.
+	comments := utils.FindAndReturnComments(questionBodyParentHTML, domain, doc.Find("div.post-layout").First())
+	question.Comments = comments
+
+	// Extract question timestamp and author information.
+	questionCard := doc.Find("div.postcell").First()
+	extractMetadata(questionCard, &question, domain)
+
+	return
+}
+
+// extractMetadata extracts author and timestamp information from a given selection.
+func extractMetadata(selection *goquery.Selection, question *types.FilteredQuestion, domain string) {
+	questionMetadata := selection.Find("div.user-info").First()
+	question.Timestamp = questionMetadata.Find("span.relativetime").First().Text()
+
+	questionAuthorURL := "https://" + domain
+	questionAuthor := selection.Find("div.post-signature.owner div.user-info div.user-details a").First()
+	question.AuthorName = questionAuthor.Text()
+	questionAuthorURL += questionAuthor.AttrOr("href", "")
+	question.AuthorURL = questionAuthorURL
+
+	// Determine if the question has been edited and update author details accordingly.
+	isQuestionEdited := selection.Find("a.js-gps-track").Text() == "edited"
+	if isQuestionEdited {
+		editedAuthor := questionMetadata.Find("a").Last()
+		question.AuthorName = editedAuthor.Text()
+		question.AuthorURL = "https://" + domain + editedAuthor.AttrOr("href", "")
+	}
+}
+
+// extractAnswersData parses the HTML document and extracts answers data.
+func extractAnswersData(doc *goquery.Document, domain string) ([]types.FilteredAnswer, error) {
+	var answers []types.FilteredAnswer
+
+	// Iterate over each answer block.
+	doc.Find("div.answer").Each(func(i int, s *goquery.Selection) {
+		var answer types.FilteredAnswer
+
+		postLayout := s.Find("div.post-layout").First()
+
+		// Extract upvotes.
+		voteCell := postLayout.Find("div.votecell").First()
+		voteCount := html.EscapeString(voteCell.Find("div.js-vote-count").Text())
+		answer.Upvotes = voteCount
+
+		// Check if the answer is accepted.
+		answer.IsAccepted = s.HasClass("accepted-answer")
+
+		// Extract answer body and process it.
+		answerCell := postLayout.Find("div.answercell").First()
+		answerBody := answerCell.Find("div.s-prose").First()
+		answerBodyHTML, _ := answerBody.Html()
+
+		// Process code blocks within the answer.
+		processedAnswerBody := utils.ProcessHTMLBody(answerBodyHTML)
+		answer.Body = template.HTML(html.UnescapeString(processedAnswerBody))
+
+		// Extract author information and timestamp.
+		extractAnswerAuthorInfo(s, &answer, domain)
+
+		answers = append(answers, answer)
+	})
+
+	return answers, nil
+}
+
+// extractAnswerAuthorInfo extracts the author name, URL, and timestamp from an answer block.
+// It directly mutates the answer.
+func extractAnswerAuthorInfo(selection *goquery.Selection, answer *types.FilteredAnswer, domain string) {
+	authorDetails := selection.Find("div.post-signature").Last()
+
+	authorName := html.EscapeString(authorDetails.Find("div.user-details a").First().Text())
+	authorURL := "https://" + domain + authorDetails.Find("div.user-details a").AttrOr("href", "")
+	timestamp := html.EscapeString(authorDetails.Find("span.relativetime").Text())
+
+	answer.AuthorName = authorName
+	answer.AuthorURL = authorURL
+	answer.Timestamp = timestamp
+}

src/routes/shortened.go

@@ -0,0 +1,45 @@
+package routes
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-resty/resty/v2"
+)
+
+func RedirectShortenedOverflowURL(c *gin.Context) {
+	id := c.Param("id")
+	answerId := c.Param("answerId")
+
+	// fetch the stack overflow URL
+	client := resty.New()
+	client.SetRedirectPolicy(
+		resty.RedirectPolicyFunc(func(req *http.Request, via []*http.Request) error {
+			return http.ErrUseLastResponse
+		}),
+	)
+
+	resp, err := client.R().Get(fmt.Sprintf("https://www.stackoverflow.com/a/%s/%s", id, answerId))
+	if err != nil {
+		c.HTML(400, "home.html", gin.H{
+			"errorMessage": "Unable to fetch stack overflow URL",
+			"theme":        c.MustGet("theme").(string),
+		})
+		return
+	}
+
+	if resp.StatusCode() != 302 {
+		c.HTML(400, "home.html", gin.H{
+			"errorMessage": fmt.Sprintf("Unexpected HTTP status from origin: %d", resp.StatusCode()),
+			"theme":        c.MustGet("theme").(string),
+		})
+		return
+	}
+
+	// get the redirect URL
+	location := resp.Header().Get("Location")
+
+	c.Redirect(302, fmt.Sprintf("%s%s", os.Getenv("APP_URL"), location))
+}

src/utils/comments.go

@@ -50,7 +50,7 @@ func FindAndReturnComments(inHtml, domain string, postLayout *goquery.Selection)
 		commentTimestamp := commentBody.Find("span.relativetime-clean").Text()
 
 		newFilteredComment := types.FilteredComment{
-			Text:       template.HTML(commentCopy),
+			Text:       template.HTML(ProcessHTMLBody(commentCopy)),
 			Timestamp:  commentTimestamp,
 			AuthorName: commentAuthor.Text(),
 			AuthorURL:  commentAuthorURL,

src/utils/images.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"regexp"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/golang-jwt/jwt/v4"
@@ -14,20 +15,28 @@ import (
 var imgTagRegex = regexp.MustCompile(`<img[^>]*\s+src\s*=\s*"(.*?)"[^>]*>`)
 
 func ReplaceImgTags(inHtml string) string {
-	// find all img tags
 	imgTags := imgTagRegex.FindAllString(inHtml, -1)
 
+	var wg sync.WaitGroup
+	var mu sync.Mutex
+
 	for _, imgTag := range imgTags {
-		// parse the src="" attribute
-		srcRegex := regexp.MustCompile(`src\s*=\s*"(.*?)"`)
-		src := srcRegex.FindStringSubmatch(imgTag)[1]
+		wg.Add(1)
+		go func(imgTag string) {
+			defer wg.Done()
+			srcRegex := regexp.MustCompile(`src\s*=\s*"(.*?)"`)
+			src := srcRegex.FindStringSubmatch(imgTag)[1]
 
-		authToken, _ := generateImageProxyAuth(src)
+			authToken, _ := generateImageProxyAuth(src)
 
-		// replace the img tag with a proxied url
-		inHtml = strings.Replace(inHtml, imgTag, fmt.Sprintf(`<img src="%s/proxy?auth=%s">`, os.Getenv("APP_URL"), authToken), 1)
+			mu.Lock()
+			defer mu.Unlock()
+			inHtml = strings.Replace(inHtml, imgTag, fmt.Sprintf(`<img src="%s/proxy?auth=%s">`, os.Getenv("APP_URL"), authToken), 1)
+		}(imgTag)
 	}
 
+	wg.Wait()
+
 	return inHtml
 }
 

src/utils/links.go

@@ -0,0 +1,45 @@
+package utils
+
+import (
+	"net/url"
+	"regexp"
+	"strings"
+)
+
+// stackOverflowLinkQualifierRegex matches all anchor elements that meet the following conditions:
+// * must be an anchor element
+// * the anchor element must have a pathname beginning with /q or /questions
+// * if there is a host, it must be stackoverflow.com or a subdomain
+var stackOverflowLinkQualifierRegex = regexp.MustCompile(`<a\s[^>]*href="(?:https?://(?:www\.)?(?:\w+\.)*(?:stackoverflow|stackexchange)\.com)?/(?:q|questions)/[^"]*"[^>]*>.*?</a>`)
+
+func ReplaceStackOverflowLinks(html string) string {
+	return stackOverflowLinkQualifierRegex.ReplaceAllStringFunc(html, func(match string) string {
+		// Extract the href attribute value from the anchor tag
+		hrefRegex := regexp.MustCompile(`href="([^"]*)"`)
+		hrefMatch := hrefRegex.FindStringSubmatch(match)
+		if len(hrefMatch) < 2 {
+			return match
+		}
+		href := hrefMatch[1]
+
+		// Parse the URL
+		url, err := url.Parse(href)
+		if err != nil {
+			return match
+		}
+
+		newUrl := url.String()
+
+		// Check if the host is a subdomain
+		parts := strings.Split(url.Host, ".")
+		if len(parts) > 2 {
+			// Prepend the subdomain to the path
+			url.Path = "/exchange/" + parts[0] + url.Path
+		}
+
+		newUrl = url.Path + url.RawQuery + url.Fragment
+
+		// Replace the href attribute value in the anchor tag
+		return strings.Replace(match, hrefMatch[1], newUrl, 1)
+	})
+}

src/utils/links_test.go

@@ -0,0 +1,49 @@
+package utils
+
+import (
+	"fmt"
+	"github.com/stretchr/testify/assert"
+	"strings"
+	"testing"
+)
+
+var sampleInput = `<div class="d-flex fd-column fw-nowrap">
+	<div class="d-flex fw-nowrap">
+		<div class="flex--item wmn0 fl1 lh-lg">
+			<div class="flex--item fl1 lh-lg">
+					<div>
+						<b>This question already has answers here</b>:
+
+					</div>
+			</div>
+		</div>
+	</div>
+			<div class="flex--item mb0 mt4">
+				<a href="/questions/55083952/is-it-possible-to-populate-a-large-set-at-compile-time" dir="ltr">Is it possible to populate a large set at compile time?</a>
+					<span class="question-originals-answer-count">
+						(3 answers)
+					</span>
+			</div>
+			<div class="flex--item mb0 mt4">
+				<a href="https://stackoverflow.com/questions/27221504/how-can-you-make-a-safe-static-singleton-in-rust" dir="ltr">How can you make a safe static singleton in Rust?</a>
+					<span class="question-originals-answer-count">
+						(5 answers)
+					</span>
+			</div>
+			<div class="flex--item mb0 mt4">
+				<a href="https://security.stackexchange.com/questions/25371/brute-force-an-ssh-login-that-has-only-a-4-letter-password" dir="ltr">Brute-force an SSH-login that has only a 4-letter password</a>
+					<span class="question-originals-answer-count">
+						(9 answers)
+					</span>
+			</div>
+		<div class="flex--item mb0 mt8">Closed <span title="2020-01-29 14:28:42Z" class="relativetime">4 years ago</span>.</div>
+</div>`
+
+func TestReplaceStackOverflowLinks(t *testing.T) {
+	replacedLinks := ReplaceStackOverflowLinks(sampleInput)
+
+	fmt.Println(replacedLinks)
+
+	assert.False(t, strings.Contains(replacedLinks, "stackoverflow.com"))
+	assert.False(t, strings.Contains(replacedLinks, "stackexchange.com"))
+}

src/utils/process.go

@@ -0,0 +1,9 @@
+package utils
+
+// ProcessHTMLBody runs HTML through the various preparation functions.
+func ProcessHTMLBody(bodyHTML string) string {
+	highlightedBody := HighlightCodeBlocks(bodyHTML)
+	imageProxiedBody := ReplaceImgTags(highlightedBody)
+	stackOverflowLinksReplacedBody := ReplaceStackOverflowLinks(imageProxiedBody)
+	return stackOverflowLinksReplacedBody
+}

src/utils/syntax.go

@@ -12,7 +12,9 @@ import (
 	"github.com/alecthomas/chroma/styles"
 )
 
-func HighlightSyntaxViaContent(content string) (htmlOut string) {
+// highlightSyntaxViaContent uses Chroma to lex code content and apply the appropriate tokenizer engine.
+// If it can't find one, it defaults to JavaScript syntax highlighting.
+func highlightSyntaxViaContent(content string) (htmlOut string) {
 	content = html.UnescapeString(content)
 
 	fallbackOut := html.EscapeString(content)
@@ -20,9 +22,7 @@ func HighlightSyntaxViaContent(content string) (htmlOut string) {
 	// identify the language
 	lexer := lexers.Analyse(content)
 	if lexer == nil {
-		// unable to identify, so just return the wrapped content
-		htmlOut = fallbackOut
-		return
+		lexer = lexers.Get(".js")
 	}
 
 	style := styles.Get("xcode")
@@ -54,7 +54,9 @@ func HighlightSyntaxViaContent(content string) (htmlOut string) {
 
 var preClassRegex = regexp.MustCompile(`(?s)<pre class=".+">`)
 
-func StripBlockTags(content string) (result string) {
+// stripBlockTags takes an extracted code block from HTML and strips it of its pre and code tags.
+// What's returned is just the code.
+func stripBlockTags(content string) (result string) {
 	// strip all "<code>" tags
 	content = strings.Replace(content, "<code>", "", -1)
 	content = strings.Replace(content, "</code>", "", -1)
@@ -68,3 +70,26 @@ func StripBlockTags(content string) (result string) {
 
 	return
 }
+
+var codeBlockRegex = regexp.MustCompile(`(?s)<pre><code>(.*?)<\/code><\/pre>`)
+
+// HighlightCodeBlocks uses both highlightSyntaxViaContent stripCodeBlocks and returns the newly highlighted code HTML.
+func HighlightCodeBlocks(html string) string {
+	// Replace each code block with the highlighted version
+	highlightedHTML := codeBlockRegex.ReplaceAllStringFunc(html, func(codeBlock string) string {
+		// Extract the code content from the code block
+		codeContent := codeBlockRegex.FindStringSubmatch(codeBlock)[1]
+
+		codeContent = stripBlockTags(codeContent)
+
+		// Highlight the code content
+		highlightedCode := highlightSyntaxViaContent(codeContent)
+
+		// Replace the original code block with the highlighted version
+		highlightedCodeBlock := "<pre>" + highlightedCode + "</pre>"
+
+		return highlightedCodeBlock
+	})
+
+	return highlightedHTML
+}

templates/home.html

@@ -7,7 +7,7 @@
             http-equiv="Content-Security-Policy"
             content="default-src 'none'; style-src 'self'; script-src 'none'; img-src 'self';"
         />
-        <link rel="icon" href="/static/codecircles.png" />
+        <link rel="icon" href="/static/codecircles.webp" />
         <meta
             name="description"
             content="View StackOverflow threads in privacy and without the clutter."
@@ -19,7 +19,7 @@
             <div class="title">
                 <img
                     class="logo"
-                    src="/static/codecircles.png"
+                    src="/static/codecircles.webp"
                     alt="4 circles with alternating colors between green and white"
                 />
                 <h1>AnonymousOverflow</h1>

templates/question.html

@@ -1,24 +1,32 @@
 <!DOCTYPE html>
 <html data-theme="{{ .theme }}">
     <head>
-        <title>{{ .question.Title }}</title>
+        <title>{{ .question.Title }} | AnonymousOverflow</title>
         <link rel="stylesheet" href="/static/question.css" />
         <link rel="stylesheet" href="/static/syntax.css" />
         <link rel="stylesheet" href="/static/comments.css" />
         <meta
             http-equiv="Content-Security-Policy"
-            content="default-src 'none'; style-src 'self'; script-src 'none'; img-src {{ .imagePolicy }};"
+            content="default-src 'none'; style-src 'self'; script-src 'self'; img-src {{ .imagePolicy }};"
         />
         <meta name="description" content="{{ .question.ShortenedBody }}..." />
         {{ template "sharedHead.html" }}
-    </head>
+        <link rel="stylesheet" href="/static/katex/katex.min.css">
+
+        <!-- The loading of KaTeX is deferred to speed up page rendering -->
+        <script defer src="/static/katex/katex.min.js"></script>
+
+        <!-- To automatically render math in text elements, include the auto-render extension: -->
+        <script defer src="/static/katex/contrib/auto-render.min.js"></script>
+        <script defer src="/static/question.js" type="text/javascript"></script>
+</head>
     <body>
         <div class="parent">
             <div class="header">
                 <a href="/" class="logo-link">
                     <img
                         class="logo"
-                        src="/static/codecircles.png"
+                        src="/static/codecircles.webp"
                         alt="4 circles with alternating colors between green and white"
                     />
                 </a>

templates/sharedHead.html

@@ -1,4 +1,4 @@
 <meta name="theme-color" content="#8CFFC1" />
-<meta name="og:image" content="/static/codecircles.png" />
+<meta name="og:image" content="/static/codecircles.webp" />
 <meta name="viewport" content="width=device-width, initial-scale=1" />
 <link rel="stylesheet" href="/static/globals.css" />