Merge branch 'main' of https://github.com/httpjamesm/AnonymousOverflow

Add Libredirect to README

README.md

@@ -6,30 +6,37 @@ This project is super lightweight by design. The UI is simple and the frontend i
 
 ## Screenshots
 
-![Home](https://cdn.horizon.pics/7HbXKZ3JBJbBDMtt51DVJgo5THFMYX.png)
+![Home](https://files.horizon.pics/e2b9275c-1409-4978-801b-de981a8d3ae9?a=1&mime1=image&mime2=png)
 
-![Question](https://cdn.horizon.pics/lqEuJMzYpgeB8au4QASsZ0S0BQHknJ.png)
+![Question](https://files.horizon.pics/0f6b0036-87f0-4acd-9a0f-936b5c397a73?a=1&mime1=image&mime2=png)
 
-![Answer](https://cdn.horizon.pics/0RwQtrxH3COTC9sfo0FsQ56I3Opl0m.png)
+![Answer](https://files.horizon.pics/861ec510-644b-43f2-9439-0a2cae841422?a=1&mime1=image&mime2=png)
 
 ## Clearnet Instances
 
-| Instance URL                                         | Region                  | Notes                                                                                            |
-| ---------------------------------------------------- | ----------------------- | ------------------------------------------------------------------------------------------------ |
-| [code.whatever.social](https://code.whatever.social) | United States & Germany | 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)                                                           |
+| 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/)                                                        |
 
 ## 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) |
+| 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) |
 
 ## Why use AnonymousOverflow over StackOverflow?
 
-- StackOverflow collects a lot of information
+-   StackOverflow collects a lot of information
 
 While it's understandable that StackOverflow collects a lot of technical data for product development, debugging and to serve the best experience to its users, not everyone wants their
 
@@ -37,19 +44,23 @@ While it's understandable that StackOverflow collects a lot of technical data fo
 
 to be collected and stored.
 
-- StackOverflow shares your information with third-parties
+-   StackOverflow shares your information with third-parties
 
 StackOverflow does not sell your information, but it does share it with third-parties, including conglomerates.
 
 > We also partner with other third parties, such as Google Ads and Microsoft Bing, to serve advertising content and manage advertising campaigns. When we use Google Ads or Microsoft Bing Customer Match for advertising campaigns, your personal data will be protected using hashed codes.
-Google users can control the ads that they see on Google services, including Customer Match ads, in their Google Ads Settings.
+> Google users can control the ads that they see on Google services, including Customer Match ads, in their Google Ads Settings.
 
 Their main website also [contains trackers from Alphabet](https://themarkup.org/blacklight?url=stackoverflow.com).
 
-- Reduced clutter
+-   Reduced clutter
 
 StackOverflow has a cluttered UI that might distract you from the content you're trying to find. AnonymousOverflow simplifies the interface to make it easier to read and navigate.
 
+## 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.
+
 ## How it works
 
 AnonymousOverflow uses the existing question endpoint that StackOverflow uses. Simply replace the domain name in the URL with the domain name of the AnonymousOverflow instance you're using and you'll be able to view the question anonymously.
@@ -86,13 +97,7 @@ Thanks to [Manav from ente.io](https://ente.io/about) for the handy tool.
 
 ## How to deploy
 
-AnonymousOverflow uses Docker for deployment.
-
-Install Docker for your platform and copy the `docker-compose.example.yml` file to `docker-compose.yml`.
-
-Then, tweak settings if needed.
-
-Run `docker compose up -d` to build and start the container.
+Read the [wiki page](https://github.com/httpjamesm/AnonymousOverflow/wiki/Deployment).
 
 ## Attribution
 

config/version.go

@@ -1,3 +1,3 @@
 package config
 
-var Version = "1.3.2"
+var Version = "1.8.1"

docker-compose.example.yml

@@ -8,6 +8,7 @@ services:
       network: 'host'
     environment:
       - APP_URL=https://domain.com
+      - JWT_SIGNING_SECRET=secret
     ports:
       - '80:8080'
     restart: 'always'

env/checks.go

@@ -10,6 +10,7 @@ import (
 func RunChecks() {
 	godotenv.Load(".env")
 	checkEnv("APP_URL")
+	checkEnv("JWT_SIGNING_SECRET")
 }
 
 func checkEnv(key string) {

go.mod

@@ -17,6 +17,7 @@ require (
 	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

go.sum

@@ -27,6 +27,8 @@ github.com/go-resty/resty/v2 v2.7.0 h1:me+K9p3uhSmXtrBZ4k9jcEAfJmuC8IivWHwaLZwPr
 github.com/go-resty/resty/v2 v2.7.0/go.mod h1:9PWDzw47qPphMRFfhsyk0NnSgvluHcljSMVIq3w7q0I=
 github.com/goccy/go-json v0.10.0 h1:mXKd9Qw4NuzShiRlOXKews24ufknHO7gx30lsDyokKA=
 github.com/goccy/go-json v0.10.0/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
+github.com/golang-jwt/jwt/v4 v4.4.3 h1:Hxl6lhQFj4AnOX6MLrsCb/+7tCj7DxP7VA+2rDIq5AU=
+github.com/golang-jwt/jwt/v4 v4.4.3/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=

main.go

@@ -32,7 +32,6 @@ func main() {
 	r := gin.Default()
 
 	r.LoadHTMLGlob("templates/*")
-	r.Static("/static", "./public")
 
 	r.Use(gin.Recovery())
 	r.Use(middleware.XssPreventionHeaders())
@@ -40,6 +39,8 @@ func main() {
 	r.Use(middleware.OptionsMiddleware())
 	r.Use(middleware.Ratelimit())
 
+	r.GET("/static/*filepath", routes.StaticContent)
+
 	r.GET("/robots.txt", func(c *gin.Context) {
 		c.String(200, "User-agent: *\nDisallow: /")
 	})
@@ -47,10 +48,28 @@ func main() {
 	r.GET("/options/:name", routes.ChangeOptions)
 
 	r.GET("/", routes.GetHome)
-
 	r.POST("/", routes.PostHome)
 
+	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")))
+	})
 	r.GET("/questions/:id/:title", routes.ViewQuestion)
+	r.GET("/questions/:id/:title/:answerId", func(c *gin.Context) {
+		// redirect user to the answer with the title
+		c.Redirect(302, fmt.Sprintf("/questions/%s/%s#%s", c.Param("id"), c.Param("title"), c.Param("answerId")))
+	})
+	r.GET("/exchange/:sub/questions/:id/:title", routes.ViewQuestion)
+	r.GET("/exchange/:sub/questions/:id", func(c *gin.Context) {
+		// redirect user to the question with the title
+		c.Redirect(302, fmt.Sprintf("/exchange/%s/questions/%s/placeholder", c.Param("sub"), c.Param("id")))
+	})
+	r.GET("/exchange/:sub/questions/:id/:title/:answerId", func(c *gin.Context) {
+		// redirect user to the answer with the title
+		c.Redirect(302, fmt.Sprintf("/exchange/%s/questions/%s/%s#%s", c.Param("sub"), c.Param("id"), c.Param("title"), c.Param("answerId")))
+	})
+
+	r.GET("/proxy", routes.GetImage)
 
 	r.Run(fmt.Sprintf("%s:%s", host, port))
 }

public/comments.css

@@ -0,0 +1,35 @@
+.comments {
+    margin-top: 1rem;
+}
+
+.comments-parent {
+    display: flex;
+    flex-direction: column;
+    gap: 1rem;
+    margin-top: 1rem;
+}
+
+.comment-parent {
+    cursor: text;
+}
+
+.comment-top {
+    display: flex;
+}
+
+.comment-score {
+    border-right: 1px solid white;
+    padding-right: .5rem;
+}
+
+.comment-body {
+    font-size: 0.95rem;
+    padding-left: .5rem;
+}
+
+.comment-author {
+    color: var(--muted-text-color);
+    font-size: 0.8rem;
+    padding-left: 1.5rem;
+    margin-top: .25rem;
+}

public/icons/link.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-6 h-6">
+  <path stroke-linecap="round" stroke-linejoin="round" d="M13.19 8.688a4.5 4.5 0 011.242 7.244l-4.5 4.5a4.5 4.5 0 01-6.364-6.364l1.757-1.757m13.35-.622l1.757-1.757a4.5 4.5 0 00-6.364-6.364l-4.5 4.5a4.5 4.5 0 001.242 7.244" />
+</svg>

public/icons/sort.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-6 h-6">
+  <path stroke-linecap="round" stroke-linejoin="round" d="M12 3c2.755 0 5.455.232 8.083.678.533.09.917.556.917 1.096v1.044a2.25 2.25 0 01-.659 1.591l-5.432 5.432a2.25 2.25 0 00-.659 1.591v2.927a2.25 2.25 0 01-1.244 2.013L9.75 21v-6.568a2.25 2.25 0 00-.659-1.591L3.659 7.409A2.25 2.25 0 013 5.818V4.774c0-.54.384-1.006.917-1.096A48.32 48.32 0 0112 3z" />
+</svg>

public/question.css

@@ -29,6 +29,20 @@ body {
     justify-content: space-between;
 }
 
+.card-tags {
+    display: flex;
+    gap: .5rem;
+}
+
+.card-tags .tag {
+    background-color: var(--meta-bg);
+    color: var(--tag-text-color);
+    padding: 0.5rem;
+    border-radius: 5px;
+    font-size: 0.8rem;
+    text-decoration: none;
+}
+
 code {
     background-color: var(--code-bg);
     padding: 0.15rem;
@@ -45,26 +59,34 @@ pre {
     line-height: 1.35;
 }
 
+pre code {
+    background: none;
+}
+
 .timestamp {
     color: var(--muted-text-color);
     font-size: 0.8rem;
 }
 
-.post-divider, .answer-divider {
+.post-divider {
     margin-top: 3rem;
     margin-bottom: 3rem;
 }
 
-.answer-divider {
-    border: 0;
-    height: 1px;
-    background-color: var(--divider-color);
-}
-
 img {
     max-width: 100%;
 }
 
+.answer {
+    padding-top: 2rem;
+    padding-bottom: 2rem;
+    border-bottom: 1px solid var(--muted-text-color);
+}
+
+.answer:last-child {
+    border-bottom: 0;
+}
+
 .answer-meta {
     border-radius: 5px;
     padding: 1rem;
@@ -72,6 +94,14 @@ img {
     margin-bottom: 1rem;
     background-color: var(--meta-bg);
     color: var(--text-color);
+    
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.answer-meta p {
+    margin: 0;
 }
 
 .answer-meta.accepted {
@@ -102,30 +132,6 @@ img {
     height: 2rem;
 }
 
-.comments {
-    margin-top: 1rem;
-}
-
-.comments-parent {
-    display: flex;
-    flex-direction: column;
-    gap: 1rem;
-    margin-top: 1rem;
-}
-
-.comment-parent {
-    cursor: text;
-}
-
-.comment-body {
-    font-size: 0.95rem;
-}
-
-.comment-author {
-    color: var(--muted-text-color);
-    font-size: 0.8rem;
-}
-
 .s-notice {
     background-color: var(--meta-bg);
     padding: 1rem;
@@ -134,6 +140,42 @@ img {
     margin-bottom: 1rem;
 }
 
+.answers-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.answers-header .sorting form {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+}
+
+.answers-header select {
+    border: 0;
+    border-radius: 5px;
+    padding: 0.5rem;
+    background-color: var(--meta-bg);
+    color: var(--text-color);
+    height: 2rem;
+}
+
+.answers-header button {
+    width: 2rem;
+    border: 0;
+    height: 2rem;
+    border-radius: 5px;
+    background-color: var(--meta-bg);
+    color: var(--text-color);
+    font-size: 1.5rem;
+    cursor: pointer;
+
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+
 @media only screen and (max-width: 800px) {
     body {
         padding-left: 1rem;

src/middleware/ratelimit.go

@@ -2,6 +2,8 @@ package middleware
 
 import (
 	"anonymousoverflow/config"
+	"os"
+	"strings"
 	"sync"
 	"time"
 
@@ -12,6 +14,17 @@ var ipMap = sync.Map{}
 
 func Ratelimit() gin.HandlerFunc {
 	return func(c *gin.Context) {
+
+		if os.Getenv("DISABLE_RATELIMIT") == "true" {
+			c.Next()
+			return
+		}
+
+		if strings.HasPrefix(c.Request.URL.Path, "/static") {
+			c.Next()
+			return
+		}
+
 		ip := c.ClientIP()
 
 		// log request count as the value, ip as key

src/routes/home.go

@@ -3,6 +3,7 @@ package routes
 import (
 	"anonymousoverflow/config"
 	"fmt"
+	"regexp"
 	"strings"
 
 	"github.com/gin-gonic/gin"
@@ -19,6 +20,8 @@ type urlConversionRequest struct {
 	URL string `form:"url" binding:"required"`
 }
 
+var stackExchangeRegex = regexp.MustCompile(`https://(.+).stackexchange.com/questions/`)
+
 func PostHome(c *gin.Context) {
 	body := urlConversionRequest{}
 
@@ -33,15 +36,24 @@ func PostHome(c *gin.Context) {
 	soLink := body.URL
 
 	// validate URL
-	if !strings.HasPrefix(soLink, "https://stackoverflow.com/questions/") {
+	isStackOverflow := strings.HasPrefix(soLink, "https://stackoverflow.com/questions/")
+	isStackExchange := stackExchangeRegex.MatchString(soLink)
+	if !isStackExchange && !isStackOverflow {
 		c.HTML(400, "home.html", gin.H{
-			"errorMessage": "Invalid stack overflow URL",
+			"errorMessage": "Invalid stack overflow/exchange URL",
 			"theme":        c.MustGet("theme").(string),
 		})
 		return
 	}
 
-	// redirect to the proxied thread
-	c.Redirect(302, fmt.Sprintf("/questions/%s", strings.TrimPrefix(soLink, "https://stackoverflow.com/questions/")))
+	// if stack overflow, trim https://stackoverflow.com
+	if isStackOverflow {
+		c.Redirect(302, strings.TrimPrefix(soLink, "https://stackoverflow.com"))
+		return
+	}
 
+	// if stack exchange, extract the subdomain
+	sub := stackExchangeRegex.FindStringSubmatch(soLink)[1]
+
+	c.Redirect(302, fmt.Sprintf("/exchange/%s/%s", sub, strings.TrimPrefix(soLink, fmt.Sprintf("https://%s.stackexchange.com", sub))))
 }

src/routes/image.go

@@ -0,0 +1,66 @@
+package routes
+
+import (
+	"anonymousoverflow/src/types"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-resty/resty/v2"
+	"github.com/golang-jwt/jwt/v4"
+)
+
+func GetImage(c *gin.Context) {
+
+	authorization := c.Query("auth")
+	if authorization == "" {
+		c.String(400, "Missing auth token")
+		return
+	}
+
+	// validate the auth token
+	token, err := jwt.ParseWithClaims(authorization, &types.ImageProxyClaims{}, func(token *jwt.Token) (interface{}, error) {
+
+		// validate the signing method
+		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
+		}
+
+		return []byte(os.Getenv("JWT_SIGNING_SECRET")), nil
+	})
+	if err != nil {
+		c.String(400, err.Error())
+		return
+	}
+
+	claims, ok := token.Claims.(*types.ImageProxyClaims)
+	if !ok || !token.Valid {
+		c.String(400, "Invalid token")
+		return
+	}
+
+	if claims.Action != "imageProxy" {
+		c.String(400, "Invalid action")
+		return
+	}
+
+	if claims.Exp < time.Now().Unix() {
+		c.String(400, "Token expired")
+		return
+	}
+
+	// download the image
+	client := resty.New()
+	resp, err := client.R().Get(claims.ImageURL)
+	if err != nil {
+		c.AbortWithStatus(500)
+		return
+	}
+
+	// set the content type
+	c.Header("Content-Type", resp.Header().Get("Content-Type"))
+
+	// write the image to the response
+	c.Writer.Write(resp.Body())
+}

src/routes/question.go

@@ -21,19 +21,17 @@ import (
 var codeBlockRegex = regexp.MustCompile(`(?s)<pre><code>(.+?)<\/code><\/pre>`)
 var questionCodeBlockRegex = regexp.MustCompile(`(?s)<pre class=".+"><code( class=".+")?>(.+?)</code></pre>`)
 
+var soSortValues = map[string]string{
+	"votes":    "scoredesc",
+	"trending": "trending",
+	"newest":   "modifieddesc",
+	"oldest":   "createdasc",
+}
+
 func ViewQuestion(c *gin.Context) {
 	client := resty.New()
 
 	questionId := c.Param("id")
-	if len(questionId) < 8 {
-		c.HTML(400, "home.html", gin.H{
-			"errorMessage": "Invalid question ID",
-			"theme":        c.MustGet("theme").(string),
-			"version":      config.Version,
-		})
-		return
-	}
-
 	if _, err := strconv.Atoi(questionId); err != nil {
 		c.HTML(400, "home.html", gin.H{
 			"errorMessage": "Invalid question ID",
@@ -45,7 +43,25 @@ func ViewQuestion(c *gin.Context) {
 
 	questionTitle := c.Param("title")
 
-	soLink := fmt.Sprintf("https://stackoverflow.com/questions/%s/%s", questionId, questionTitle)
+	sortValue := c.Query("sort_by")
+	if sortValue == "" {
+		sortValue = "votes"
+	}
+
+	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)
+	}
+
+	soLink := fmt.Sprintf("https://%s/questions/%s/%s?answertab=%s", domain, questionId, questionTitle, soSortValue)
 
 	resp, err := client.R().Get(soLink)
 	if err != nil {
@@ -56,6 +72,7 @@ func ViewQuestion(c *gin.Context) {
 		})
 		return
 	}
+	defer resp.RawResponse.Body.Close()
 
 	if resp.StatusCode() != 200 {
 		c.HTML(500, "home.html", gin.H{
@@ -90,6 +107,9 @@ func ViewQuestion(c *gin.Context) {
 
 	questionPostLayout := doc.Find("div.post-layout").First()
 
+	questionTags := utils.GetPostTags(questionPostLayout)
+	newFilteredQuestion.Tags = questionTags
+
 	questionBodyParent := doc.Find("div.s-prose")
 
 	questionBodyParentHTML, err := questionBodyParent.Html()
@@ -102,7 +122,7 @@ func ViewQuestion(c *gin.Context) {
 		return
 	}
 
-	newFilteredQuestion.Body = template.HTML(questionBodyParentHTML)
+	newFilteredQuestion.Body = template.HTML(utils.ReplaceImgTags(questionBodyParentHTML))
 
 	questionBodyText := questionBodyParent.Text()
 
@@ -117,7 +137,7 @@ func ViewQuestion(c *gin.Context) {
 
 	newFilteredQuestion.ShortenedBody = shortenedBody
 
-	comments := utils.FindAndReturnComments(questionBodyParentHTML, questionPostLayout)
+	comments := utils.FindAndReturnComments(questionBodyParentHTML, domain, questionPostLayout)
 	newFilteredQuestion.Comments = comments
 
 	// parse any code blocks and highlight them
@@ -158,24 +178,33 @@ func ViewQuestion(c *gin.Context) {
 	userDetails := questionMetadata.Find("div.user-details")
 
 	questionAuthor := ""
-	questionAuthorURL := ""
+	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) {
-		// get the second
-		if i == 0 {
-			if s.Text() != "" {
-				// if it's not been edited, it means it's the first
+		// if question has been edited, the author is the second element.
+
+		if isQuestionEdited {
+			if i == 1 {
 				questionAuthor = s.Text()
-				questionAuthorURL, _ = s.Attr("href")
+				questionAuthorURL += s.AttrOr("href", "")
+				return
+			}
+		} else {
+			// otherwise it's the first element
+			if i == 0 {
+				questionAuthor = s.Text()
+				questionAuthorURL += s.AttrOr("href", "")
 				return
 			}
-		}
-
-		// otherwise it's the second element
-		if i == 1 {
-			questionAuthor = s.Text()
-			questionAuthorURL, _ = s.Attr("href")
-			return
 		}
 	})
 
@@ -185,6 +214,7 @@ func ViewQuestion(c *gin.Context) {
 	answers := []types.FilteredAnswer{}
 
 	doc.Find("div.answer").Each(func(i int, s *goquery.Selection) {
+
 		newFilteredAnswer := types.FilteredAnswer{}
 
 		postLayout := s.Find("div.post-layout")
@@ -200,30 +230,25 @@ func ViewQuestion(c *gin.Context) {
 
 		answerFooter := s.Find("div.mt24")
 
-		answerAuthorURL := ""
+		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 {
-				return
+			if answerAuthorDetails.Length() > 0 {
+				questionAuthor := answerAuthorDetails.Find("a").First()
+				answerAuthorName = html.EscapeString(questionAuthor.Text())
+				answerAuthorURL += html.EscapeString(questionAuthor.AttrOr("href", ""))
 			}
 
-			if answerAuthorDetails.Length() > 1 {
-				if i == 0 {
-					return
-				}
-			}
-
-			answerAuthor := answerAuthorDetails.Find("a").First()
-
-			answerAuthorURL = html.EscapeString(answerAuthor.AttrOr("href", ""))
-			answerAuthorName = html.EscapeString(answerAuthor.Text())
 			answerTimestamp = html.EscapeString(s.Find("span.relativetime").Text())
 		})
 
+		answerId, _ := s.Attr("data-answerid")
+		newFilteredAnswer.ID = answerId
+
 		newFilteredAnswer.AuthorName = answerAuthorName
 		newFilteredAnswer.AuthorURL = answerAuthorURL
 		newFilteredAnswer.Timestamp = answerTimestamp
@@ -240,10 +265,10 @@ func ViewQuestion(c *gin.Context) {
 			answerBodyHTML = strings.Replace(answerBodyHTML, codeBlock, highlightedCodeBlock, 1)
 		}
 
-		comments = utils.FindAndReturnComments(answerBodyHTML, postLayout)
+		comments = utils.FindAndReturnComments(answerBodyHTML, domain, postLayout)
 
 		newFilteredAnswer.Comments = comments
-		newFilteredAnswer.Body = template.HTML(answerBodyHTML)
+		newFilteredAnswer.Body = template.HTML(utils.ReplaceImgTags(answerBodyHTML))
 
 		answers = append(answers, newFilteredAnswer)
 	})
@@ -260,6 +285,8 @@ func ViewQuestion(c *gin.Context) {
 		"imagePolicy": imagePolicy,
 		"theme":       c.MustGet("theme").(string),
 		"currentUrl":  fmt.Sprintf("%s/questions/%s/%s", os.Getenv("APP_URL"), questionId, questionTitle),
+		"sortValue":   sortValue,
+		"domain":      domain,
 	})
 
 }

src/routes/static.go

@@ -0,0 +1,14 @@
+package routes
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+func StaticContent(c *gin.Context) {
+	cleanFilePath := strings.ReplaceAll(c.Param("filepath"), "..", "")
+
+	c.File(fmt.Sprintf("./public/%s", cleanFilePath))
+}

src/types/answer.go

@@ -3,6 +3,8 @@ package types
 import "html/template"
 
 type FilteredAnswer struct {
+	ID string
+
 	Upvotes    string
 	IsAccepted bool
 

src/types/comment.go

@@ -7,4 +7,5 @@ type FilteredComment struct {
 	Timestamp  string
 	AuthorName string
 	AuthorURL  string
+	Upvotes    string
 }

src/types/imageProxy.go

@@ -0,0 +1,14 @@
+package types
+
+import "github.com/golang-jwt/jwt/v4"
+
+type ImageProxyClaims struct {
+	Action string `json:"action"`
+
+	ImageURL string `json:"image_url"`
+
+	Iss int64 `json:"iss"`
+	Exp int64 `json:"exp"`
+
+	jwt.RegisteredClaims
+}

src/types/question.go

@@ -10,4 +10,5 @@ type FilteredQuestion struct {
 	AuthorURL     string
 	ShortenedBody string
 	Comments      []FilteredComment
+	Tags          []string
 }

src/utils/comments.go

@@ -2,12 +2,13 @@ package utils
 
 import (
 	"anonymousoverflow/src/types"
+	"fmt"
 	"html/template"
 
 	"github.com/PuerkitoBio/goquery"
 )
 
-func FindAndReturnComments(inHtml string, postLayout *goquery.Selection) (comments []types.FilteredComment) {
+func FindAndReturnComments(inHtml, domain string, postLayout *goquery.Selection) (comments []types.FilteredComment) {
 
 	commentsComponent := postLayout.Find("div.js-post-comments-component")
 
@@ -17,6 +18,14 @@ func FindAndReturnComments(inHtml string, postLayout *goquery.Selection) (commen
 	allComments := commentsList2.Find("li.comment")
 
 	allComments.Each(func(i int, s *goquery.Selection) {
+		commentScoreParent := s.Find("div.comment-score")
+
+		// find the first span within commentScoreParent
+		commentScore := commentScoreParent.Find("span").First().Text()
+		if commentScore == "" {
+			commentScore = "0"
+		}
+
 		commentText := s.Find("div.comment-text")
 
 		commentBody := commentText.Find("div.comment-body")
@@ -26,7 +35,7 @@ func FindAndReturnComments(inHtml string, postLayout *goquery.Selection) (commen
 			return
 		}
 
-		commentAuthorURL := ""
+		commentAuthorURL := fmt.Sprintf("https://%s", domain)
 
 		commentAuthor := commentBody.Find("span.comment-user")
 		if commentAuthor.Length() == 0 {
@@ -35,7 +44,7 @@ func FindAndReturnComments(inHtml string, postLayout *goquery.Selection) (commen
 				return
 			}
 
-			commentAuthorURL = commentAuthor.AttrOr("href", "")
+			commentAuthorURL += commentAuthor.AttrOr("href", "")
 		}
 
 		commentTimestamp := commentBody.Find("span.relativetime-clean").Text()
@@ -45,6 +54,7 @@ func FindAndReturnComments(inHtml string, postLayout *goquery.Selection) (commen
 			Timestamp:  commentTimestamp,
 			AuthorName: commentAuthor.Text(),
 			AuthorURL:  commentAuthorURL,
+			Upvotes:    commentScore,
 		}
 
 		comments = append(comments, newFilteredComment)

src/utils/images.go

@@ -0,0 +1,52 @@
+package utils
+
+import (
+	"anonymousoverflow/src/types"
+	"fmt"
+	"os"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/golang-jwt/jwt/v4"
+)
+
+var imgTagRegex = regexp.MustCompile(`<img[^>]*\s+src\s*=\s*"(.*?)"[^>]*>`)
+
+func ReplaceImgTags(inHtml string) string {
+	// find all img tags
+	imgTags := imgTagRegex.FindAllString(inHtml, -1)
+
+	for _, imgTag := range imgTags {
+		// parse the src="" attribute
+		srcRegex := regexp.MustCompile(`src\s*=\s*"(.*?)"`)
+		src := srcRegex.FindStringSubmatch(imgTag)[1]
+
+		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)
+	}
+
+	return inHtml
+}
+
+func generateImageProxyAuth(url string) (string, error) {
+	// generate a jwt with types.ImageProxyClaims
+	claims := types.ImageProxyClaims{
+		Action:   "imageProxy",
+		ImageURL: url,
+		Iss:      time.Now().Unix(),
+		Exp:      time.Now().Add(time.Minute).Unix(),
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS512, claims)
+
+	// sign the token
+	ss, err := token.SignedString([]byte(os.Getenv("JWT_SIGNING_SECRET")))
+	if err != nil {
+		return "", err
+	}
+
+	return ss, nil
+}

src/utils/tags.go

@@ -0,0 +1,13 @@
+package utils
+
+import (
+	"github.com/PuerkitoBio/goquery"
+)
+
+func GetPostTags(postLayout *goquery.Selection) []string {
+	var tags []string
+	postLayout.Find("a.post-tag").Each(func(i int, s *goquery.Selection) {
+		tags = append(tags, s.Text())
+	})
+	return tags
+}

templates/comments.html

@@ -1,18 +1,25 @@
 <details class="comments">
     <summary>
-        Show <b>{{ (len .Comments) }} comments</b>
+        Show
+        <b
+            >{{ (len .Comments) }} comment{{ if gt (len .Comments) 1 }}s{{
+            end }}</b
+        >
     </summary>
     <div class="comments-parent">
         {{ range $comment := .Comments }}
         <div class="comment-parent">
             <div class="comment">
-                <div class="comment-body">
-                    {{ $comment.Text }}
+                <div class="comment-top">
+                    <div class="comment-score" title="Comment Upvotes">
+                        {{ $comment.Upvotes }}
+                    </div>
+                    <div class="comment-body">{{ $comment.Text }}</div>
                 </div>
                 <div class="comment-author">
                     Commented {{ $comment.Timestamp }} by
                     <a
-                        href="https://stackoverflow.com{{ $comment.AuthorURL }}"
+                        href="{{ $comment.AuthorURL }}"
                         target="_blank"
                         rel="noopener noreferrer"
                         >{{ $comment.AuthorName }}</a

templates/home.html

@@ -40,7 +40,7 @@
                 <p><b>Error</b>: {{ .errorMessage }}</p>
             </div>
             {{end}} {{ end }}
-            <form method="POST">
+            <form method="POST" action="/">
                 <div class="view-form">
                     <input
                         class="view-input"

templates/question.html

@@ -4,6 +4,7 @@
         <title>{{ .question.Title }}</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 }};"
@@ -21,7 +22,7 @@
                         alt="4 circles with alternating colors between green and white"
                     />
                 </a>
-                {{ template "themeSwitcher.html" .}}
+                {{ template "themeSwitcher.html" . }}
             </div>
             <div class="card">
                 <div class="card-header">
@@ -29,7 +30,7 @@
                     <p class="timestamp">
                         Asked {{ .question.Timestamp }} by
                         <a
-                            href="https://stackoverflow.com{{ .question.AuthorURL }}"
+                            href="{{ .question.AuthorURL }}"
                             target="_blank"
                             rel="noopener noreferrer"
                             >{{ .question.AuthorName }}</a
@@ -37,38 +38,65 @@
                     </p>
                 </div>
                 <div class="card-body">{{ .question.Body }}</div>
-                {{ if .question.Comments }}
-                    {{ template "comments.html" .question }}
-                {{end}}
-
+                <div class="card-tags">
+                    {{ range .question.Tags }}
+                        <div class="tag">{{ . }}</div>
+                    {{ end }}
+                </div>
+                {{ if .question.Comments }} {{ template "comments.html"
+                .question }} {{end}}
             </div>
             <hr class="post-divider" />
-            <h2>Answers</h2>
+            <div class="answers-header">
+                <h2>Answers</h2>
+                <div class="sorting">
+                    <form>
+                        <select name="sort_by">
+                            <option disabled value="">Sort answers by...</option>
+                            <option value="votes"{{ if eq .sortValue "votes" }} selected{{ end }}>Votes</option>
+                            <option value="trending"{{ if eq .sortValue "trending" }} selected{{ end }}>Trending</option>
+                            <option value="newest"{{ if eq .sortValue "newest" }} selected{{ end }}>Date modified (newest first)</option>
+                            <option value="oldest"{{ if eq .sortValue "oldest" }} selected{{ end }}>Date created (oldest first)</option>
+                        </select>
+                        <button type="submit">
+                            <img
+                                src="/static/icons/sort.svg"
+                                alt="Sieve icon"
+                            />
+                        </button>
+                    </form>
+                </div>
+            </div>
             {{ range $answer := .answers }}
-            <div class="answer">
+            <div class="answer" id="{{ $answer.ID }}">
                 <div
                     class="answer-meta{{ if $answer.IsAccepted }} accepted{{end}}"
                 >
+                <p>
                     {{ if $answer.IsAccepted }} Accepted - {{ end }}
                     {{$answer.Upvotes}} Votes
-                </div>
+                </p>
+                <a href="#{{ $answer.ID }}" class="answer-link">
+                    <div class="icon">
+                        <img src="/static/icons/link.svg" alt="Paperclip icon" />
+                    </div>
+                </a>
+            </div>
                 {{ $answer.Body }}
                 <div class="answer-author-parent">
                     <div class="answer-author">
                         Answered {{ $answer.Timestamp }} by
                         <a
-                            href="https://stackoverflow.com{{ $answer.AuthorURL }}"
+                            href="{{ $answer.AuthorURL }}"
                             target="_blank"
                             rel="noopener noreferrer"
                             >{{ $answer.AuthorName }}</a
                         >
                     </div>
                 </div>
-                {{ if $answer.Comments }}
-                    {{ template "comments.html" $answer }}
+                {{ if $answer.Comments }} {{ template "comments.html" $answer }}
                 {{end}}
             </div>
-            <hr class="answer-divider" />
             {{ end }}
         </div>
     </body>