WIP: Add rules argument

.github/workflows/release-binaries.yaml

@@ -1,4 +1,4 @@
-name: release binaries
+name: Release Binaries
 
 on:
   push:
@@ -22,7 +22,7 @@ jobs:
       -
         name: Set version
         run: |
-          echo -n $(git describe --tags --abbrev=0) > cmd/VERSION
+          echo -n $(git describe --tags --abbrev=0) > handlers/VERSION
       -
         name: Set up Go
         uses: actions/setup-go@v3

.github/workflows/release-docker.yaml

@@ -0,0 +1,108 @@
+name: Docker Build and Push
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+on:
+  #schedule:
+  #  - cron: '17 14 * * *'
+  push:
+    # branches: [ "main" ]
+    # Publish semver tags as releases.
+    tags: [ 'v*.*.*' ]
+    paths-ignore:
+      - 'docs/**'
+  #pull_request:
+  #  branches: [ "main" ]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  #IMAGE_NAME: ${{ github.repository }}
+
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      # This is used to complete the identity challenge
+      # with sigstore/fulcio when running outside of PRs.
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set version
+        id: version
+        run: |
+          echo ${GITHUB_REF#refs/tags/v} > handlers/VERSION
+
+      # Install the cosign tool except on PR
+      # https://github.com/sigstore/cosign-installer
+      - name: Install cosign
+        if: github.event_name != 'pull_request'
+        uses: sigstore/cosign-installer@main
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        with:
+          platforms: 'arm64,amd64'
+
+      # Workaround: https://github.com/docker/build-push-action/issues/461
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@v2
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          images: ${{ env.REGISTRY }}/${{ github.repository }}
+          tags: |
+            type=semver,pattern=v{{version}}
+            type=semver,pattern=v{{major}}.{{minor}}
+            type=semver,pattern=v{{major}}
+
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          platforms: linux/amd64,linux/arm64
+          labels: ${{ steps.meta.outputs.labels }}
+
+      # Sign the resulting Docker image digest except on PRs.
+      # This will only write to the public Rekor transparency log when the Docker
+      # repository is public to avoid leaking data.  If you would like to publish
+      # transparency data even for private images, pass --force to cosign below.
+      # https://github.com/sigstore/cosign
+#      - name: Sign the published Docker image
+#        if: ${{ github.event_name != 'pull_request' }}
+#          COSIGN_EXPERIMENTAL: "true"
+#        env:
+#        # This step uses the identity token to provision an ephemeral certificate
+#        # against the sigstore community Fulcio instance.
+#        run: cosign sign ${{ steps.meta.outputs.tags }}@${{ steps.build-and-push.outputs.digest }}

.goreleaser.yaml

@@ -7,7 +7,7 @@ before:
 builds:
   -
     main: cmd/main.go
-    binary: kubero
+    binary: ladder
     env:
       - CGO_ENABLED=0
     goos:

Dockerfile

@@ -20,4 +20,6 @@ RUN apt update && apt install -y ca-certificates && rm -rf /var/lib/apt/lists/*
 
 #EXPOSE 8080
 
-#ENTRYPOINT ["/usr/bin/dumb-init", "--"]
+#ENTRYPOINT ["/usr/bin/dumb-init", "--"]
+
+CMD ["sh", "-c", "/app/ladder"]

README.md

@@ -1,5 +1,5 @@
 <p align="center">
-    <img src="public/pigeon.svg" width="100px">
+    <img src="assets/pigeon.svg" width="100px">
 </p>
 
 <h1 align="center">Ladder</h1>
@@ -10,22 +10,43 @@
 
 Freedom of information is an essential pillar of democracy and informed decision-making. While media organizations have legitimate financial interests, it is crucial to strike a balance between profitability and the public's right to access information. The proliferation of paywalls raises concerns about the erosion of this fundamental freedom, and it is imperative for society to find innovative ways to preserve access to vital information without compromising the sustainability of journalism. In a world where knowledge should be shared and not commodified, paywalls should be critically examined to ensure that they do not undermine the principles of an open and informed society.
 
-Some site might have missing images or other formating issues. This is due to the fact that the site using javascript or CSS to load the images/JS/CSS. This is a limitation of this proxy. If you prefer a full experience, please concider buying a subscription for the site.
+> **Disclaimer:** This project is intended for educational purposes only. The author does not endorse or encourage any unethical or illegal activity. Use this tool at your own risk.
 
 ### Features
 - [x] Bypass Paywalls
-- [x] Remove CORS
+- [x] Remove CORS headers from responses, assets, and images ...
-- [x] Keep Site browsable
+- [x] Apply domain based ruleset/code to modify response
-- [x] Docker Container
+- [x] Keep site browsable
-- [x] Linux Binary
+- [x] API
-- [x] Mac OS Binary
+- [x] Fetch RAW HTML
-- [x] Windows Binary (Untested)
+- [x] Custom User Agent
+- [x] Custom X-Forwarded-For IP
+- [x] [Docker container](https://github.com/kubero-dev/ladder/pkgs/container/ladder) (amd64, arm64)
+- [x] Linux binary
+- [x] Mac OS binary
+- [x] Windows binary (untested)
+- [x] Removes most of the ads (unexpected side effect ¯\_(ツ)_/¯ )
+- [x] Basic Auth
+- [x] Disable logs
+- [x] No Tracking
+- [x] Limit the proxy to a list of domains
+- [x] Expose Ruleset to other ladders
+- [ ] Optional TOR proxy
+- [ ] A key to share only one URL
+- [ ] Fetch from Google Cache if not available
 
-## How to use
+### Limitations
+Certain sites may display missing images or encounter formatting issues. This can be attributed to the site's reliance on JavaScript or CSS for image and resource loading, which presents a limitation when accessed through this proxy. If you prefer a full experience, please concider buying a subscription for the site.
+
+Some sites do not expose their content to search engines, which means that the proxy cannot access the content. A future version will try to fetch the content from Google Cache.
+
+## Installation
+
+> **Warning:** If your instance will be publicly accessible, make sure to enable Basic Auth. This will prevent unauthorized users from using your proxy. If you do not enable Basic Auth, anyone can use your proxy to browse nasty/illegal stuff. And you will be responsible for it.
 
 ### Binary
-1) Download Binary
+1) Download binary [here](https://github.com/kubero-dev/ladder/releases/latest)
-2) Run Binary
+2) Unpack and run the binary `./ladder`
 3) Open Browser (Default: http://localhost:8080)
 
 ### Docker
@@ -35,15 +56,84 @@ docker run -p 8080:8080 -d --name ladder ghcr.io/kubero-dev/ladder:latest
 
 ### Docker Compose
 ```bash
-wget https://raw.githubusercontent.com/kubero-dev/ladder/main/docker-compose.yml
+curl https://raw.githubusercontent.com/kubero-dev/ladder/main/docker-compose.yaml --output docker-compose.yaml
 docker-compose up -d
 ```
 
+## Usage
+
+### Browser
+1) Open Browser (Default: http://localhost:8080)
+2) Enter URL
+3) Press Enter
+
+Or direct by appending the URL to the end of the proxy URL:
+http://localhost:8080/https://www.example.com
+
+### API
+```bash
+curl -X GET "http://localhost:8080/api/https://www.example.com"
+```
+
+### RAW
+http://localhost:8080/raw/https://www.example.com
+
+
+### Running Ruleset
+http://localhost:8080/ruleset
+
 ## Configuration
 
 ### Environment Variables
 
-| Variable | Description | Default |
+| Variable | Description | Value |
 | --- | --- | --- |
 | `PORT` | Port to listen on | `8080` |
 | `PREFORK` | Spawn multiple server instances | `false` |
+| `USER_AGENT` | User agent to emulate | `Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)` |
+| `X_FORWARDED_FOR` | IP forwarder address | `66.249.66.1` |
+| `USERPASS` | Enables Basic Auth, format `admin:123456` | `` |
+| `LOG_URLS` | Log fetched URL's | `true` |
+| `DISABLE_FORM` | Disables URL Form Frontpage | `false` |
+| `FORM_PATH` | Path to custom Form HTML | `` |
+| `RULESET` | URL to a ruleset file | `https://raw.githubusercontent.com/kubero-dev/ladder/main/ruleset.yaml` or `/path/to/my/rules.yaml` or `default` |
+| `EXPOSE_RULESET` | Make your Ruleset available to other ladders | `true` |
+| `ALLOWED_DOMAINS` | Comma separated list of allowed domains. Empty = no limitations | `` |
+| `ALLOWED_DOMAINS_RULESET` | Allow Domains from Ruleset. false = no limitations | `false` |
+
+`ALLOWED_DOMAINS` and `ALLOWED_DOMAINS_RULESET` are joined together. If both are empty, no limitations are applied.
+
+### Ruleset
+
+It is possible to apply custom rules to modify the response. This can be used to remove unwanted or modify elements from the page. The ruleset is a YAML file that contains a list of rules for each domain and is loaded on startup
+
+See in [ruleset.yaml](ruleset.yaml) for an example.
+
+```yaml
+- domain: www.example.com
+  regexRules:
+    - match: <script\s+([^>]*\s+)?src="(/)([^"]*)"
+      replace: <script $1 script="/https://www.example.com/$3"
+  injections:
+    - position: head # Position where to inject the code
+      append: | 
+        <script>
+          window.localStorage.clear();
+          console.log("test");
+          alert("Hello!");
+        </script>
+- domain: www.anotherdomain.com # Domain where the rule applies
+  paths:                        # Paths where the rule applies
+    - /article
+  googleCache: false            # Search also in Google Cache
+  regexRules:                   # Regex rules to apply
+    - match: <script\s+([^>]*\s+)?src="(/)([^"]*)"
+      replace: <script $1 script="/https://www.example.com/$3"
+  injections:
+    - position: .left-content article .post-title # Position where to inject the code into DOM
+      replace: | 
+        <h1>My Custom Title</h1>
+    - position: .left-content article # Position where to inject the code into DOM
+      prepend: | 
+        <h2>Suptitle</h2>
+```

cmd/main.go

@@ -1,31 +1,92 @@
 package main
 
 import (
+	_ "embed"
+	"fmt"
+
 	"ladder/handlers"
 	"log"
 	"os"
 	"strconv"
+	"strings"
 
+	"github.com/akamensky/argparse"
 	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/middleware/basicauth"
+	"github.com/gofiber/fiber/v2/middleware/favicon"
 )
 
+//go:embed favicon.ico
+var faviconData string
+
 func main() {
 
-	prefork, _ := strconv.ParseBool(os.Getenv("PREFORK"))
+	parser := argparse.NewParser("ladder", "Every Wall needs a Ladder")
+
+	p := os.Getenv("PORT")
+	if os.Getenv("PORT") == "" {
+		p = "8080"
+	}
+	port := parser.String("p", "port", &argparse.Options{
+		Required: false,
+		Default:  p,
+		Help:     "Port the webserver will listen on"})
+
+	pf, _ := strconv.ParseBool(os.Getenv("PREFORK"))
+	prefork := parser.Flag("P", "prefork", &argparse.Options{
+		Required: false,
+		Default:  pf,
+		Help:     "This will spawn multiple processes listening"})
+
+	r := os.Getenv("RULESET")
+	ruleset := parser.String("r", "ruleset", &argparse.Options{
+		Required: false,
+		Default:  r,
+		Help:     "Path or URL to your ruleset"})
+
+	handlers.LoadRules(*ruleset)
+
+	err := parser.Parse(os.Args)
+	if err != nil {
+		fmt.Print(parser.Usage(err))
+	}
+
 	app := fiber.New(
 		fiber.Config{
-			Prefork: prefork,
+			Prefork: *prefork,
 		},
 	)
 
+	userpass := os.Getenv("USERPASS")
+	if userpass != "" {
+		userpass := strings.Split(userpass, ":")
+		app.Use(basicauth.New(basicauth.Config{
+			Users: map[string]string{
+				userpass[0]: userpass[1],
+			},
+		}))
+	}
+
+	app.Use(favicon.New(favicon.Config{
+		Data: []byte(faviconData),
+		URL:  "/favicon.ico",
+	}))
+
+	if os.Getenv("NOLOGS") != "true" {
+		app.Use(func(c *fiber.Ctx) error {
+			log.Println(c.Method(), c.Path())
+			return c.Next()
+		})
+	}
+
 	app.Get("/", handlers.Form)
-	app.Get("debug/*", handlers.Debug)
+	app.Get("ruleset", handlers.Ruleset)
+
+	app.Get("raw/*", handlers.Raw)
+	app.Get("api/*", handlers.Api)
+	app.Get("ruleset", handlers.Raw)
 	app.Get("/*", handlers.ProxySite)
 
-	port := os.Getenv("PORT")
+	log.Fatal(app.Listen(":" + *port))
-	if os.Getenv("PORT") == "" {
-		port = "8080"
-	}
-	log.Fatal(app.Listen(":" + port))
 
 }

docker-compose.yaml

@@ -5,12 +5,15 @@ services:
     container_name: ladder
     build: .
     #restart: always
-    #command: tail -f /dev/null
+    #command: sh -c ./ladder
-    command: sh -c ./ladder
     environment:
       - PORT=8080
-      - PREFORK=true
+      #- PREFORK=true
-      #- GODEBUG=netdns=go+4
+      #- X_FORWARDED_FOR=66.249.66.1
+      #- USER_AGENT=Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
+      #- USERPASS=foo:bar
+      #- LOG_URLS=true
+      #- GODEBUG=netdns=go
     ports:
       - "8080:8080"
     deploy:

go.mod

@@ -2,17 +2,30 @@ module ladder
 
 go 1.21.1
 
+require github.com/gofiber/fiber/v2 v2.50.0
+
 require (
+	github.com/andybalholm/cascadia v1.3.1 // indirect
+	golang.org/x/net v0.8.0 // indirect
+)
+
+require (
+	github.com/PuerkitoBio/goquery v1.8.1
+	github.com/akamensky/argparse v1.4.0
 	github.com/andybalholm/brotli v1.0.6 // indirect
-	github.com/gofiber/fiber/v2 v2.50.0
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/google/uuid v1.4.0 // indirect
 	github.com/klauspost/compress v1.17.2 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rivo/uniseg v0.4.4 // indirect
+	github.com/stretchr/objx v0.5.0 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasthttp v1.50.0 // indirect
 	github.com/valyala/tcplisten v1.0.0 // indirect
 	golang.org/x/sys v0.13.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,5 +1,14 @@
+github.com/PuerkitoBio/goquery v1.8.1 h1:uQxhNlArOIdbrH1tr0UXwdVFgDcZDrZVdcpygAcwmWM=
+github.com/PuerkitoBio/goquery v1.8.1/go.mod h1:Q8ICL1kNUJ2sXGoAhPGUdYDJvgQgHzJsnnd3H7Ho5jQ=
+github.com/akamensky/argparse v1.4.0 h1:YGzvsTqCvbEZhL8zZu2AiA5nq805NZh75JNj4ajn1xc=
+github.com/akamensky/argparse v1.4.0/go.mod h1:S5kwC7IuDcEr5VeXtGPRVZ5o/FdhcMlQz4IZQuw64xA=
 github.com/andybalholm/brotli v1.0.6 h1:Yf9fFpf49Zrxb9NlQaluyE92/+X7UVHlhMNJN2sxfOI=
 github.com/andybalholm/brotli v1.0.6/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
+github.com/andybalholm/cascadia v1.3.1 h1:nhxRkql1kdYCc8Snf7D5/D3spOX+dBgjA6u8x004T2c=
+github.com/andybalholm/cascadia v1.3.1/go.mod h1:R4bJ1UQfqADjvDa4P6HZHLh/3OxWWEqc0Sk8XGwHqvA=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/gofiber/fiber/v2 v2.50.0 h1:ia0JaB+uw3GpNSCR5nvC5dsaxXjRU5OEu36aytx+zGw=
 github.com/gofiber/fiber/v2 v2.50.0/go.mod h1:21eytvay9Is7S6z+OgPi7c7n4++tnClWmhpimVHMimw=
 github.com/google/uuid v1.4.0 h1:MtMxsa51/r9yyhkyLsVeVt0B+BGQZzpQiTQ4eHZ8bc4=
@@ -13,16 +22,62 @@ github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWE
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
 github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.4.4 h1:8TfxU8dW6PdqD27gjM8MVNuicgxIjxpm4K7x4jp8sis=
 github.com/rivo/uniseg v0.4.4/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0 h1:1zr/of2m5FGMsad5YfcqgdqdWrIhu+EBEJRhR1U7z/c=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasthttp v1.50.0 h1:H7fweIlBm0rXLs2q0XbalvJ6r0CUPFWK3/bB4N13e9M=
 github.com/valyala/fasthttp v1.50.0/go.mod h1:k2zXd82h/7UZc3VOdJ2WaUqt1uZ/XpXAfE9i+HBC3lA=
 github.com/valyala/tcplisten v1.0.0 h1:rBHj/Xf+E1tRGZyWIWwJDiRY0zc1Js+CV5DqwacVSA8=
 github.com/valyala/tcplisten v1.0.0/go.mod h1:T0xQ8SeCZGxckz9qRXTfG43PvQ/mcWh7FwZEA7Ioqkc=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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handlers/api.go

@@ -0,0 +1,58 @@
+package handlers
+
+import (
+	_ "embed"
+
+	"log"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+//go:embed VERSION
+var version string
+
+func Api(c *fiber.Ctx) error {
+	// Get the url from the URL
+	urlQuery := c.Params("*")
+
+	queries := c.Queries()
+	body, req, resp, err := fetchSite(urlQuery, queries)
+	if err != nil {
+		log.Println("ERROR:", err)
+		c.SendStatus(500)
+		return c.SendString(err.Error())
+	}
+
+	response := Response{
+		Version: version,
+		Body:    body,
+	}
+	response.Request.Headers = make([]interface{}, 0)
+	for k, v := range req.Header {
+		response.Request.Headers = append(response.Request.Headers, map[string]string{
+			"key":   k,
+			"value": v[0],
+		})
+	}
+
+	response.Response.Headers = make([]interface{}, 0)
+	for k, v := range resp.Header {
+		response.Response.Headers = append(response.Response.Headers, map[string]string{
+			"key":   k,
+			"value": v[0],
+		})
+	}
+
+	return c.JSON(response)
+}
+
+type Response struct {
+	Version string `json:"version"`
+	Body    string `json:"body"`
+	Request struct {
+		Headers []interface{} `json:"headers"`
+	} `json:"request"`
+	Response struct {
+		Headers []interface{} `json:"headers"`
+	} `json:"response"`
+}

handlers/api.test.go

@@ -0,0 +1,44 @@
+// BEGIN: 7d5e1f7c7d5e
+package handlers
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestApi(t *testing.T) {
+	app := fiber.New()
+	app.Get("/api/*", Api)
+
+	tests := []struct {
+		name           string
+		url            string
+		expectedStatus int
+	}{
+		{
+			name:           "valid url",
+			url:            "https://www.google.com",
+			expectedStatus: http.StatusOK,
+		},
+		{
+			name:           "invalid url",
+			url:            "invalid-url",
+			expectedStatus: http.StatusBadRequest,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			req := httptest.NewRequest(http.MethodGet, "/api/"+tt.url, nil)
+			resp, err := app.Test(req)
+			assert.NoError(t, err)
+			assert.Equal(t, tt.expectedStatus, resp.StatusCode)
+		})
+	}
+}
+
+// END: 7d5e1f7c7d5e

handlers/debug.go

@@ -1,44 +0,0 @@
-package handlers
-
-import (
-	"io"
-	"log"
-	"net/http"
-	"net/url"
-
-	"github.com/gofiber/fiber/v2"
-)
-
-func Debug(c *fiber.Ctx) error {
-	// Get the url from the URL
-	urlQuery := c.Params("*")
-
-	u, err := url.Parse(urlQuery)
-	if err != nil {
-		return c.SendString(err.Error())
-	}
-
-	log.Println(u.String())
-
-	// Fetch the site
-	client := &http.Client{}
-	req, _ := http.NewRequest("GET", u.String(), nil)
-	req.Header.Set("User-Agent", "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")
-	req.Header.Set("X-Forwarded-For", "66.249.66.1")
-	req.Header.Set("Referer", u.String())
-	req.Header.Set("Host", u.Host)
-	resp, err := client.Do(req)
-
-	if err != nil {
-		return c.SendString(err.Error())
-	}
-	defer resp.Body.Close()
-
-	bodyB, err := io.ReadAll(resp.Body)
-	if err != nil {
-		log.Println("ERROR", err)
-		return c.SendString(err.Error())
-	}
-	body := rewriteHtml(bodyB, u)
-	return c.SendString(body)
-}

handlers/form.go

@@ -1,179 +1,31 @@
 package handlers
 
-import "github.com/gofiber/fiber/v2"
+import (
+	_ "embed"
+	"log"
+	"os"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+//go:embed form.html
+var formHtml string
 
 func Form(c *fiber.Ctx) error {
-	c.Set("Content-Type", "text/html")
+	if os.Getenv("DISABLE_FORM") == "true" {
-	return c.SendString(html)
+		c.Set("Content-Type", "text/html")
+		c.SendStatus(fiber.StatusNotFound)
+		return c.SendString("Form Disabled")
+	} else {
+		if os.Getenv("FORM_PATH") != "" {
+			dat, err := os.ReadFile(os.Getenv("FORM_PATH"))
+			if err != nil {
+				log.Println("ERROR: unable to load custom form", err)
+			} else {
+				formHtml = string(dat)
+			}
+		}
+		c.Set("Content-Type", "text/html")
+		return c.SendString(formHtml)
+	}
 }
-
-const html = `
-<!DOCTYPE html>
-<html>
-<head>
-    <meta charset="UTF-8">
-    <title>Ladder</title>
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css">
-</head>
-    <style>
-        body {
-            background-color: #ffffff;
-        }
-
-        header h1 {
-            text-transform: uppercase;
-            font-size: 70px;
-            font-weight: 600;
-            color: #fdfdfe;
-            text-shadow: 0px 0px 5px #7AA7D1, 0px 0px 10px #7AA7D1, 0px 0px 10px #7AA7D1,
-                0px 0px 20px #7AA7D1;
-        }
-        .logo-title {
-            font-family: 'Arial', sans-serif;
-            font-size: 2rem;
-            color: #fff;
-            margin-bottom: 20px;
-        }
-        .logo {
-            text-align: center;
-        }
-        .github-corner {
-            animation: octocat-wave 560ms ease-in-out;
-            position:absolute;
-            top:0;
-            right:0;
-        }
-    </style>
-</head>
-<body>
-    <a href="https://github.com/kubero-dev/ladder">
-        <div class="github-corner" aria-label="View source on GitHub">
-            <svg
-                xmlns:svg="http://www.w3.org/2000/svg"
-                xmlns="http://www.w3.org/2000/svg"
-                xmlns:xlink="http://www.w3.org/1999/xlink"
-                version="1.1"
-                width="146"
-                height="146"
-                id="svg2">
-                <defs
-                    id="defs8">
-                    <filter
-                    height="1.096"
-                    y="-0.048"
-                    width="1.096"
-                    x="-0.048"
-                    style="color-interpolation-filters:sRGB"
-                    id="filter6">
-                    <feGaussianBlur
-                        stdDeviation="3"
-                        id="feGaussianBlur4" />
-                    </filter>
-                </defs>
-                <path
-                    d="M 152,140 6,-6 H 48 L 152,98 Z"
-                    style="opacity:0.8;filter:url(#filter6)"
-                    id="path10" />
-                <path
-                    d="M 146,134 12,0 h 42 l 92,92 z"
-                    style="fill:#007200"
-                    id="path12" />
-                <g
-                    aria-label="Fork me on GitHub"
-                    transform="rotate(45)"
-                    style="font-family:Collegiate;fill:#ffffff"
-                    id="g42">
-                    <path
-                    d="m 53.643,-19.486 c 0,0.688 -0.016,1.2 -0.064,1.504 h 2.08 c -0.048,-0.32 -0.064,-0.8 -0.064,-1.424 v -3.344 h 1.76 c 0.416,0 0.736,0.016 0.944,0.048 v -1.76 c -0.24,0.032 -0.592,0.048 -1.088,0.048 h -1.616 v -2.496 h 1.936 c 0.56,0 0.944,0.016 1.184,0.048 v -1.792 h -5.136 c 0.048,0.272 0.064,0.784 0.064,1.504 z"
-                    id="path14" />
-                    <path
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-                    id="path16" />
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-                    id="path34" />
-                    <path
-                    d="m 140.259,-27.678 c 0,-0.416 0.016,-0.736 0.064,-0.976 h -2.096 c 0.048,0.24 0.064,0.688 0.064,1.344 v 2.8 h -2.912 v -3.024 c 0,-0.48 0.016,-0.848 0.064,-1.12 h -2.08 c 0.048,0.256 0.064,0.624 0.064,1.12 v 8.432 c 0,0.496 -0.016,0.864 -0.064,1.12 h 2.08 c -0.048,-0.24 -0.064,-0.656 -0.064,-1.232 v -3.552 h 2.912 v 3.568 c 0,0.528 -0.016,0.944 -0.064,1.216 h 2.096 c -0.048,-0.24 -0.064,-0.624 -0.064,-1.12 v -3.664 h 0.528 v -1.744 h -0.528 z"
-                    id="path36" />
-                    <path
-                    d="m 144.402,-17.918 c 0.56,0 1.072,-0.208 1.568,-0.64 v 0.576 h 1.744 c -0.016,-0.176 -0.032,-0.576 -0.032,-1.2 v -4.896 c 0,-0.496 0.016,-0.832 0.032,-1.008 h -1.856 c 0,0.048 0.064,0.64 0.064,1.008 v 3.936 c -0.368,0.352 -0.704,0.528 -1.008,0.528 -0.432,0 -0.72,-0.16 -0.88,-0.496 -0.144,-0.272 -0.208,-0.704 -0.208,-1.312 l 0.016,-2.16 c 0.016,-0.768 0.032,-1.264 0.064,-1.504 h -1.92 c 0.048,0.256 0.064,0.752 0.064,1.472 v 2.192 c 0,0.976 0.16,1.776 0.48,2.384 0.4,0.752 1.024,1.12 1.872,1.12 z"
-                    id="path38" />
-                    <path
-                    d="m 152.31,-17.934 c 0.848,0 1.536,-0.416 2.048,-1.232 0.432,-0.704 0.64,-1.536 0.64,-2.48 0,-0.928 -0.208,-1.712 -0.608,-2.368 -0.48,-0.752 -1.136,-1.12 -1.984,-1.12 -0.464,0 -0.944,0.16 -1.44,0.464 v -2.784 c 0,-0.608 0.016,-1.008 0.032,-1.2 h -1.824 c 0.032,0.176 0.048,0.576 0.048,1.2 v 8.464 c 0,0.496 -0.016,0.832 -0.048,1.008 h 1.696 v -0.576 c 0.384,0.416 0.864,0.624 1.44,0.624 z m -0.24,-5.52 c 0.736,0 1.104,0.608 1.104,1.808 0,0.496 -0.08,0.928 -0.256,1.296 -0.208,0.464 -0.528,0.688 -0.944,0.688 -0.336,0 -0.672,-0.16 -1.008,-0.496 v -2.768 c 0.384,-0.352 0.752,-0.528 1.104,-0.528 z"
-                    id="path40" />
-                </g>
-                <path
-                    d="m 52,0 94,94 M 14,0 146,132"
-                    style="fill:none;stroke:#ffffff;stroke-dasharray:2, 1;stroke-opacity:0.95"
-                    id="path44" />
-                </svg>
-        </div>
-    </a>
-    <div class="container">
-		<div class="logo">
-			<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="250" height="250" viewBox="0 0 512 512">
-				<path fill="#7AA7D1" d="M262.074 485.246C254.809 485.265 247.407 485.534 240.165 484.99L226.178 483.306C119.737 468.826 34.1354 383.43 25.3176 274.714C24.3655 262.975 23.5876 253.161 24.3295 241.148C31.4284 126.212 123.985 31.919 238.633 24.1259L250.022 23.8366C258.02 23.8001 266.212 23.491 274.183 24.1306C320.519 27.8489 366.348 45.9743 402.232 75.4548L416.996 88.2751C444.342 114.373 464.257 146.819 475.911 182.72L480.415 197.211C486.174 219.054 488.67 242.773 487.436 265.259L486.416 275.75C478.783 352.041 436.405 418.1 369.36 455.394L355.463 462.875C326.247 477.031 294.517 484.631 262.074 485.246ZM253.547 72.4475C161.905 73.0454 83.5901 144.289 73.0095 234.5C69.9101 260.926 74.7763 292.594 83.9003 317.156C104.53 372.691 153.9 416.616 211.281 430.903C226.663 434.733 242.223 436.307 258.044 436.227C353.394 435.507 430.296 361.835 438.445 267.978C439.794 252.442 438.591 236.759 435.59 221.5C419.554 139.955 353.067 79.4187 269.856 72.7052C264.479 72.2714 258.981 72.423 253.586 72.4127L253.547 72.4475Z"/>
-				<path fill="#7AA7D1" d="M153.196 310.121L133.153 285.021C140.83 283.798 148.978 285.092 156.741 284.353L156.637 277.725L124.406 278.002C123.298 277.325 122.856 276.187 122.058 275.193L116.089 267.862C110.469 260.975 103.827 254.843 98.6026 247.669C103.918 246.839 105.248 246.537 111.14 246.523L129.093 246.327C130.152 238.785 128.62 240.843 122.138 240.758C111.929 240.623 110.659 242.014 105.004 234.661L97.9953 225.654C94.8172 221.729 91.2219 218.104 88.2631 214.005C84.1351 208.286 90.1658 209.504 94.601 209.489L236.752 209.545C257.761 209.569 268.184 211.009 285.766 221.678L285.835 206.051C285.837 197.542 286.201 189.141 284.549 180.748C280.22 158.757 260.541 143.877 240.897 135.739C238.055 134.561 232.259 133.654 235.575 129.851C244.784 119.288 263.68 111.99 277.085 111.105C288.697 109.828 301.096 113.537 311.75 117.703C360.649 136.827 393.225 183.042 398.561 234.866C402.204 270.253 391.733 308.356 367.999 335.1C332.832 374.727 269.877 384.883 223.294 360.397C206.156 351.388 183.673 333.299 175.08 316.6C173.511 313.551 174.005 313.555 170.443 313.52L160.641 313.449C158.957 313.435 156.263 314.031 155.122 312.487L153.196 310.121Z"/>
-			</svg>
-		</div>
-        <header>
-            <h1 class="center-align logo-title">ladddddddder</h1>
-        </header>
-        <form id="inputForm" class="col s12" method="get">
-            <div class="row">
-                <div class="input-field col s12">
-                    <input type="text" id="inputField" name="inputField" class="validate" required>
-                    <label for="inputField">URL</label>
-                </div>
-				<!--
-                <div class="input-field col s2">
-                    <button class="btn waves-effect waves-light" type="submit" name="action">Submit
-                        <i class="material-icons right">go</i>
-                    </button>
-                </div>
-				-->
-            </div>
-        </form>
-    </div>
-
-    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/js/materialize.min.js"></script>
-    <script>
-        document.addEventListener('DOMContentLoaded', function() {
-            M.AutoInit();
-        });
-        document.getElementById('inputForm').addEventListener('submit', function (e) {
-            e.preventDefault();
-            const inputValue = document.getElementById('inputField').value;
-            window.location.href = '/' + inputValue;
-            return false;
-        });
-    </script>
-</body>
-</html>
-`

handlers/form.html

@@ -159,8 +159,11 @@
         });
         document.getElementById('inputForm').addEventListener('submit', function (e) {
             e.preventDefault();
-            const inputValue = document.getElementById('inputField').value;
+            let url = document.getElementById('inputField').value;
-            window.location.href = '/' + inputValue;
+            if (url.indexOf('http') === -1) {
+                url = 'https://' + url;
+            }
+            window.location.href = '/' + url;
             return false;
         });
     </script>

handlers/proxy.go

@@ -6,49 +6,84 @@ import (
 	"log"
 	"net/http"
 	"net/url"
+	"os"
 	"regexp"
 	"strings"
 
+	"github.com/PuerkitoBio/goquery"
 	"github.com/gofiber/fiber/v2"
+	"gopkg.in/yaml.v3"
 )
 
+var UserAgent = getenv("USER_AGENT", "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")
+var ForwardedFor = getenv("X_FORWARDED_FOR", "66.249.66.1")
+var rulesSet RuleSet
+
+// var rulesSet = loadRules()
+var allowedDomains = strings.Split(os.Getenv("ALLOWED_DOMAINS"), ",")
+var Aaaa = "aaaa"
+
 func ProxySite(c *fiber.Ctx) error {
 	// Get the url from the URL
-	urlQuery := c.Params("*")
+	url := c.Params("*")
 
-	u, err := url.Parse(urlQuery)
+	queries := c.Queries()
+	body, _, resp, err := fetchSite(url, queries)
 	if err != nil {
-		log.Println("ERROR", err)
+		log.Println("ERROR:", err)
-		c.SendStatus(500)
+		c.SendStatus(fiber.StatusInternalServerError)
 		return c.SendString(err.Error())
 	}
 
-	log.Println(u.String())
+	c.Set("Content-Type", resp.Header.Get("Content-Type"))
+	return c.SendString(body)
+}
+
+func fetchSite(urlpath string, queries map[string]string) (string, *http.Request, *http.Response, error) {
+
+	urlQuery := "?"
+	if len(queries) > 0 {
+		for k, v := range queries {
+			urlQuery += k + "=" + v + "&"
+		}
+	}
+	urlQuery = strings.TrimSuffix(urlQuery, "&")
+	urlQuery = strings.TrimSuffix(urlQuery, "?")
+
+	u, err := url.Parse(urlpath)
+	if err != nil {
+		return "", nil, nil, err
+	}
+
+	if len(allowedDomains) > 0 && !StringInSlice(u.Host, allowedDomains) {
+		return "", nil, nil, fmt.Errorf("domain not allowed. %s not in %s", u.Host, allowedDomains)
+	}
+
+	if os.Getenv("DEBUG	") == "true" {
+		log.Println(u.String() + urlQuery)
+	}
 
 	// Fetch the site
 	client := &http.Client{}
-	req, _ := http.NewRequest("GET", u.String(), nil)
+	req, _ := http.NewRequest("GET", u.String()+urlQuery, nil)
-	req.Header.Set("User-Agent", "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")
+	req.Header.Set("User-Agent", UserAgent)
-	req.Header.Set("X-Forwarded-For", "66.249.66.1")
+	req.Header.Set("X-Forwarded-For", ForwardedFor)
 	req.Header.Set("Referer", u.String())
 	req.Header.Set("Host", u.Host)
 	resp, err := client.Do(req)
 
 	if err != nil {
-		return c.SendString(err.Error())
+		return "", nil, nil, err
 	}
 	defer resp.Body.Close()
 
 	bodyB, err := io.ReadAll(resp.Body)
 	if err != nil {
-		log.Println("ERROR", err)
+		return "", nil, nil, err
-		c.SendStatus(500)
-		return c.SendString(err.Error())
 	}
 
 	body := rewriteHtml(bodyB, u)
-	c.Set("Content-Type", resp.Header.Get("Content-Type"))
+	return body, req, resp, nil
-	return c.SendString(body)
 }
 
 func rewriteHtml(bodyB []byte, u *url.URL) string {
@@ -63,7 +98,7 @@ func rewriteHtml(bodyB []byte, u *url.URL) string {
 	// scripts
 	scriptPattern := `<script\s+([^>]*\s+)?src="(/)([^"]*)"`
 	reScript := regexp.MustCompile(scriptPattern)
-	body = reScript.ReplaceAllString(body, fmt.Sprintf(`<script $1 script="%s$3"`, "/https://"+u.Host))
+	body = reScript.ReplaceAllString(body, fmt.Sprintf(`<script $1 script="%s$3"`, "/https://"+u.Host+"/"))
 
 	//body = strings.ReplaceAll(body, "srcset=\"/", "srcset=\"/https://"+u.Host+"/") // TODO: Needs a regex to rewrite the URL's
 	body = strings.ReplaceAll(body, "href=\"/", "href=\"/https://"+u.Host+"/")
@@ -71,5 +106,137 @@ func rewriteHtml(bodyB []byte, u *url.URL) string {
 	body = strings.ReplaceAll(body, "url(/", "url(/https://"+u.Host+"/")
 	body = strings.ReplaceAll(body, "href=\"https://"+u.Host, "href=\"/https://"+u.Host+"/")
 
+	if os.Getenv("RULESET") != "" {
+		body = applyRules(u.Host, u.Path, body)
+	}
 	return body
 }
+
+func getenv(key, fallback string) string {
+	value := os.Getenv(key)
+	if len(value) == 0 {
+		return fallback
+	}
+	return value
+}
+
+func LoadRules(rulesUrl string) RuleSet {
+	//rulesUrl := os.Getenv("RULESET")
+	if rulesUrl == "" {
+		RulesList := RuleSet{}
+		return RulesList
+	}
+
+	if rulesUrl == "default" {
+		rulesUrl = "https://raw.githubusercontent.com/kubero-dev/ladder/main/ruleset.yaml"
+	}
+
+	log.Println("Loading rules: " + rulesUrl)
+
+	var ruleSet RuleSet
+	if strings.HasPrefix(rulesUrl, "http") {
+
+		resp, err := http.Get(rulesUrl)
+		if err != nil {
+			log.Println("ERROR:", err)
+		}
+		defer resp.Body.Close()
+
+		if resp.StatusCode >= 400 {
+			log.Println("ERROR:", resp.StatusCode, rulesUrl)
+		}
+
+		body, err := io.ReadAll(resp.Body)
+		if err != nil {
+			log.Println("ERROR:", err)
+		}
+		yaml.Unmarshal(body, &ruleSet)
+
+		if err != nil {
+			log.Println("ERROR:", err)
+		}
+	} else {
+		yamlFile, err := os.ReadFile(rulesUrl)
+		if err != nil {
+			log.Println("ERROR:", err)
+		}
+		yaml.Unmarshal(yamlFile, &ruleSet)
+	}
+
+	for _, rule := range ruleSet {
+		//log.Println("Loaded rules for", rule.Domain)
+		if os.Getenv("ALLOWED_DOMAINS_RULESET") == "true" {
+			allowedDomains = append(allowedDomains, rule.Domain)
+		}
+	}
+
+	log.Println("Loaded rules for", len(ruleSet), "Domains")
+	return ruleSet
+}
+
+func applyRules(domain string, path string, body string) string {
+	if len(rulesSet) == 0 {
+		return body
+	}
+
+	for _, rule := range rulesSet {
+		if rule.Domain != domain {
+			continue
+		}
+		if len(rule.Paths) > 0 && !StringInSlice(path, rule.Paths) {
+			continue
+		}
+		for _, regexRule := range rule.RegexRules {
+			re := regexp.MustCompile(regexRule.Match)
+			body = re.ReplaceAllString(body, regexRule.Replace)
+		}
+		for _, injection := range rule.Injections {
+			doc, err := goquery.NewDocumentFromReader(strings.NewReader(body))
+			if err != nil {
+				log.Fatal(err)
+			}
+			if injection.Replace != "" {
+				doc.Find(injection.Position).ReplaceWithHtml(injection.Replace)
+			}
+			if injection.Append != "" {
+				doc.Find(injection.Position).AppendHtml(injection.Append)
+			}
+			if injection.Prepend != "" {
+				doc.Find(injection.Position).PrependHtml(injection.Prepend)
+			}
+			body, err = doc.Html()
+			if err != nil {
+				log.Fatal(err)
+			}
+		}
+	}
+
+	return body
+}
+
+type Rule struct {
+	Match   string `yaml:"match"`
+	Replace string `yaml:"replace"`
+}
+
+type RuleSet []struct {
+	Domain      string   `yaml:"domain"`
+	Paths       []string `yaml:"paths,omitempty"`
+	GoogleCache bool     `yaml:"googleCache,omitempty"`
+	RegexRules  []Rule   `yaml:"regexRules"`
+	Injections  []struct {
+		Position string `yaml:"position"`
+		Append   string `yaml:"append"`
+		Prepend  string `yaml:"prepend"`
+		Replace  string `yaml:"replace"`
+	} `yaml:"injections"`
+}
+
+func StringInSlice(s string, list []string) bool {
+	for _, x := range list {
+		if strings.HasPrefix(s, x) {
+			return true
+		}
+	}
+	return false
+}

handlers/proxy.test.go

@@ -0,0 +1,58 @@
+// BEGIN: 6f8b3f5d5d5d
+package handlers
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"testing"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestProxySite(t *testing.T) {
+	app := fiber.New()
+	app.Get("/:url", ProxySite)
+
+	req := httptest.NewRequest("GET", "/https://example.com", nil)
+	resp, err := app.Test(req)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
+}
+
+func TestRewriteHtml(t *testing.T) {
+	bodyB := []byte(`
+		<html>
+			<head>
+				<title>Test Page</title>
+			</head>
+			<body>
+				<img src="/image.jpg">
+				<script src="/script.js"></script>
+				<a href="/about">About Us</a>
+				<div style="background-image: url('/background.jpg')"></div>
+			</body>
+		</html>
+	`)
+	u := &url.URL{Host: "example.com"}
+
+	expected := `
+		<html>
+			<head>
+				<title>Test Page</title>
+			</head>
+			<body>
+				<img src="/https://example.com/image.jpg">
+				<script script="/https://example.com/script.js"></script>
+				<a href="/https://example.com/about">About Us</a>
+				<div style="background-image: url('/https://example.com/background.jpg')"></div>
+			</body>
+		</html>
+	`
+
+	actual := rewriteHtml(bodyB, u)
+	assert.Equal(t, expected, actual)
+}
+
+// END: 6f8b3f5d5d5d

handlers/raw.go

@@ -0,0 +1,21 @@
+package handlers
+
+import (
+	"log"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+func Raw(c *fiber.Ctx) error {
+	// Get the url from the URL
+	urlQuery := c.Params("*")
+
+	queries := c.Queries()
+	body, _, _, err := fetchSite(urlQuery, queries)
+	if err != nil {
+		log.Println("ERROR:", err)
+		c.SendStatus(500)
+		return c.SendString(err.Error())
+	}
+	return c.SendString(body)
+}

handlers/raw.test.go

@@ -0,0 +1,60 @@
+// BEGIN: 7f8d9e6d4b5c
+package handlers
+
+import (
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+func TestRaw(t *testing.T) {
+	app := fiber.New()
+	app.Get("/raw/*", Raw)
+
+	testCases := []struct {
+		name     string
+		url      string
+		expected string
+	}{
+		{
+			name:     "valid url",
+			url:      "https://www.google.com",
+			expected: "<!doctype html>",
+		},
+		{
+			name:     "invalid url",
+			url:      "invalid-url",
+			expected: "parse invalid-url: invalid URI for request",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			req := httptest.NewRequest(http.MethodGet, "/raw/"+tc.url, nil)
+			resp, err := app.Test(req)
+			if err != nil {
+				t.Fatalf("unexpected error: %v", err)
+			}
+			defer resp.Body.Close()
+
+			if resp.StatusCode != http.StatusOK {
+				t.Errorf("expected status OK; got %v", resp.Status)
+			}
+
+			body, err := io.ReadAll(resp.Body)
+			if err != nil {
+				t.Fatalf("unexpected error: %v", err)
+			}
+
+			if !strings.Contains(string(body), tc.expected) {
+				t.Errorf("expected body to contain %q; got %q", tc.expected, string(body))
+			}
+		})
+	}
+}
+
+// END: 7f8d9e6d4b5c

handlers/ruleset.go

@@ -0,0 +1,24 @@
+package handlers
+
+import (
+	"os"
+
+	"github.com/gofiber/fiber/v2"
+	"gopkg.in/yaml.v3"
+)
+
+func Ruleset(c *fiber.Ctx) error {
+
+	if os.Getenv("EXPOSE_RULESET") == "false" {
+		c.SendStatus(fiber.StatusForbidden)
+		return c.SendString("Rules Disabled")
+	}
+
+	body, err := yaml.Marshal(rulesSet)
+	if err != nil {
+		c.SendStatus(fiber.StatusInternalServerError)
+		return c.SendString(err.Error())
+	}
+
+	return c.SendString(string(body))
+}

ruleset.yaml

@@ -0,0 +1,55 @@
+- domain: www.example.com
+  regexRules:
+    - match: <script\s+([^>]*\s+)?src="(/)([^"]*)"
+      replace: <script $1 script="/https://www.example.com/$3"
+  injections:
+    - position: head # Position where to inject the code
+      append: | 
+        <script>
+          window.localStorage.clear();
+          console.log("test");
+          alert("Hello!");
+        </script>
+    - position: h1
+      replace: | 
+        <h1>An example with a ladder ;-)</h1>
+- domain: www.americanbanker.com
+  paths: 
+    - /news
+  injections:
+    - position: head
+      append: | 
+        <script>
+          document.addEventListener("DOMContentLoaded", () => {
+            const inlineGate = document.querySelector('.inline-gate');
+            if (inlineGate) {
+              inlineGate.classList.remove('inline-gate');
+              const inlineGated = document.querySelectorAll('.inline-gated');
+              for (const elem of inlineGated) { elem.classList.remove('inline-gated'); }
+            }
+          });
+        </script>
+- domain: www.nzz.ch
+  paths: 
+    - /international
+    - /sport
+    - /wirtschaft
+    - /technologie
+    - /feuilleton
+    - /zuerich
+    - /wissenschaft
+    - /gesellschaft
+    - /panorama
+    - /mobilitaet
+    - /reisen
+    - /meinung
+    - /finanze
+  injections:
+    - position: head
+      append: | 
+        <script>
+          document.addEventListener("DOMContentLoaded", () => {
+            const paywall = document.querySelector('.dynamic-regwall');
+            removeDOMElement(paywall)
+          });
+        </script>