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

Add Libredirect to README

README.md

@@ -16,7 +16,7 @@ This project is super lightweight by design. The UI is simple and the frontend i
 
 | 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) |
+| [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)                                                           |
@@ -57,6 +57,10 @@ Their main website also [contains trackers from Alphabet](https://themarkup.org/
 
 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.

config/version.go

@@ -1,3 +1,3 @@
 package config
 
-var Version = "1.6.1"
+var Version = "1.8.1"

main.go

@@ -55,6 +55,19 @@ func main() {
 		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)
 

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/question.css

@@ -94,6 +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 {

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/question.go

@@ -53,7 +53,15 @@ func ViewQuestion(c *gin.Context) {
 		soSortValue = soSortValues["votes"]
 	}
 
-	soLink := fmt.Sprintf("https://stackoverflow.com/questions/%s/%s?answertab=%s", questionId, questionTitle, soSortValue)
+	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 {
@@ -64,6 +72,7 @@ func ViewQuestion(c *gin.Context) {
 		})
 		return
 	}
+	defer resp.RawResponse.Body.Close()
 
 	if resp.StatusCode() != 200 {
 		c.HTML(500, "home.html", gin.H{
@@ -128,7 +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
@@ -169,24 +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
 		}
 	})
 
@@ -196,6 +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")
@@ -211,30 +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
@@ -251,7 +265,7 @@ 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(utils.ReplaceImgTags(answerBodyHTML))
@@ -272,6 +286,7 @@ func ViewQuestion(c *gin.Context) {
 		"theme":       c.MustGet("theme").(string),
 		"currentUrl":  fmt.Sprintf("%s/questions/%s/%s", os.Getenv("APP_URL"), questionId, questionTitle),
 		"sortValue":   sortValue,
+		"domain":      domain,
 	})
 
 }

src/types/answer.go

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

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")
 
@@ -34,7 +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 {
@@ -43,7 +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()

templates/comments.html

@@ -19,7 +19,7 @@
                 <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/question.html

@@ -30,7 +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
@@ -68,19 +68,26 @@
                 </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