initial commit

.gitignore

@@ -0,0 +1,2 @@
+# dev binary
+ladder

Dockerfile

@@ -0,0 +1,42 @@
+# Building the binary of the App
+FROM golang:1.21 AS build
+
+WORKDIR /go/src/ladder
+
+# Copy all the Code and stuff to compile everything
+COPY . .
+
+# Downloads all the dependencies in advance (could be left out, but it's more clear this way)
+RUN go mod download
+
+# Builds the application as a staticly linked one, to allow it to run on alpine
+#RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o ladder cmd/main.go
+#RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o ladder cmd/main.go
+#RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -a -o ladder cmd/main.go
+#RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -tags netgo -a -installsuffix cgo -o ladder cmd/main.go
+#RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -tags netgo -a -o ladder cmd/main.go
+RUN CGO_ENABLED=0 GOOS=linux go build -o ladder cmd/main.go
+
+
+# Moving the binary to the 'final Image' to make it smaller
+FROM debian:12-slim as release
+#FROM debian:latest as release
+#FROM ubuntu:latest as release
+#FROM golang:bookworm as release
+
+WORKDIR /app
+
+# Create the `public` dir and copy all the assets into it
+RUN mkdir ./public
+COPY ./public ./public
+
+COPY --from=build /go/src/ladder/ladder .
+RUN chmod +x /app/ladder
+
+RUN apt update && apt install -y ca-certificates && rm -rf /var/lib/apt/lists/*
+
+# Exposes port 2000 and 3000 because our program listens on that port
+#EXPOSE 2000
+#EXPOSE 3000
+
+#ENTRYPOINT ["/usr/bin/dumb-init", "--"]

Dockerfile.alpine

@@ -0,0 +1,37 @@
+# Building the binary of the App
+FROM golang:1.21 AS build
+
+WORKDIR /go/src/ladder
+
+# Copy all the Code and stuff to compile everything
+COPY . .
+
+# Downloads all the dependencies in advance (could be left out, but it's more clear this way)
+RUN go mod download
+
+# Builds the application as a staticly linked one, to allow it to run on alpine
+#RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o ladder cmd/main.go
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -tags netgo -a -installsuffix cgo -o ladder cmd/main.go
+
+
+# Moving the binary to the 'final Image' to make it smaller
+FROM alpine:latest as release
+
+WORKDIR /app
+
+# Create the `public` dir and copy all the assets into it
+RUN mkdir ./public
+COPY ./public ./public
+
+COPY --from=build /go/src/ladder/ladder .
+
+# Add packages
+RUN apk -U upgrade \
+    && apk add --no-cache dumb-init ca-certificates \
+    && chmod +x /app/ladder
+
+# Exposes port 2000 and 3000 because our program listens on that port
+#EXPOSE 2000
+#EXPOSE 3000
+
+#ENTRYPOINT ["/usr/bin/dumb-init", "--"]

Dockerfile.test

@@ -0,0 +1,46 @@
+# Building the binary of the App
+FROM golang:bookworm AS build
+
+WORKDIR /go/src/ladder
+
+# Copy all the Code and stuff to compile everything
+COPY . .
+
+# Downloads all the dependencies in advance (could be left out, but it's more clear this way)
+RUN go mod download
+
+# Builds the application as a staticly linked one, to allow it to run on alpine
+#RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o ladder cmd/main.go
+#RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o ladder cmd/main.go
+#RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -a -o ladder cmd/main.go
+#RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -tags netgo -a -installsuffix cgo -o ladder cmd/main.go
+#RUN CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -tags netgo -a -o ladder cmd/main.go
+RUN CGO_ENABLED=0 GOOS=linux go build -o ladder cmd/main.go
+
+
+# Moving the binary to the 'final Image' to make it smaller
+FROM debian:12-slim as release
+#FROM debian:latest as release
+#FROM ubuntu:latest as release
+#FROM golang:bookworm as release
+
+WORKDIR /app
+
+RUN apt update && apt install -y ca-certificates 
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o ladder cmd/main.go
+
+# Create the `public` dir and copy all the assets into it
+RUN mkdir ./public
+COPY ./public ./public
+
+COPY --from=build /go/src/ladder/ladder .
+RUN chmod +x /app/ladder
+
+RUN rm -rf /var/lib/apt/lists/*
+
+# Exposes port 2000 and 3000 because our program listens on that port
+#EXPOSE 2000
+#EXPOSE 3000
+
+#ENTRYPOINT ["/usr/bin/dumb-init", "--"]

README.md

@@ -0,0 +1 @@
+# paywall-ladder

cmd/main.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"paywall-ladder/handlers"
+	"syscall"
+
+	"github.com/elazarl/goproxy"
+	"github.com/gofiber/fiber/v2"
+)
+
+func main() {
+
+	//os.Setenv("HTTP_PROXY", "http://localhost:3000")
+	proxyForkID, _, _ := syscall.Syscall(syscall.SYS_FORK, 0, 0, 0) // LINUX
+	//_, proxyForkID, _ := syscall.Syscall(syscall.SYS_FORK, 0, 0, 0) // MAC
+
+	fmt.Println("Proxy fork id", proxyForkID)
+
+	if proxyForkID == 0 {
+
+		app := fiber.New()
+		app.Static("/", "./public")
+
+		app.Get("/proxy/*", handlers.FetchSite)
+		app.Get("debug/*", handlers.Debug)
+		app.Get("/*", handlers.ProxySite)
+
+		port := os.Getenv("PORT")
+		if os.Getenv("PORT") == "" {
+			port = "2000"
+		}
+		app.Listen(":" + port)
+	} else {
+		proxy := goproxy.NewProxyHttpServer()
+		proxy.Verbose = true
+		proxy.OnRequest().DoFunc(
+			func(req *http.Request, ctx *goproxy.ProxyCtx) (*http.Request, *http.Response) {
+				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")
+				return req, nil
+			})
+
+		proxyport := os.Getenv("PORT_PROXY")
+		if os.Getenv("PORT_PROXY") == "" {
+			proxyport = "3000"
+		}
+		log.Println("Proxy listening on port " + proxyport)
+		log.Fatal(http.ListenAndServe(":"+proxyport, proxy))
+	}
+
+}

docker-compose.yaml

@@ -0,0 +1,15 @@
+version: '3'
+services:
+  ladder:
+    build: .
+    container_name: ladder
+    #restart: always
+    command: tail -f /dev/null
+    #command: ./ladder
+    environment:
+      - PORT=2000
+      - PORT_PROXY=3000
+      - GODEBUG=netdns=go+4
+    ports:
+      - "2000:2000"
+      - "8080:3000"

go.mod

@@ -0,0 +1,29 @@
+module paywall-ladder
+
+go 1.21.1
+
+require (
+	github.com/elazarl/goproxy v0.0.0-20231031074852-3ec07828be7a
+	github.com/gojek/heimdall/v7 v7.0.2
+)
+
+require (
+	github.com/andybalholm/brotli v1.0.6 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/gofiber/fiber/v2 v2.50.0 // indirect
+	github.com/gojek/valkyrie v0.0.0-20180215180059-6aee720afcdf // 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/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rivo/uniseg v0.4.4 // indirect
+	github.com/stretchr/objx v0.3.0 // indirect
+	github.com/stretchr/testify v1.3.0 // 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
+)

go.sum

@@ -0,0 +1,61 @@
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handlers/debug.go

@@ -0,0 +1,38 @@
+package handlers
+
+import (
+	"io/ioutil"
+	"net/http"
+	"time"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/gojek/heimdall/v7/httpclient"
+)
+
+func Debug(c *fiber.Ctx) error {
+	//url := c.Params("*")
+
+	timeout := 1000 * time.Millisecond
+	client := httpclient.NewClient(httpclient.WithHTTPTimeout(timeout))
+
+	headers := http.Header{}
+	headers.Set("User-Agent", "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")
+	headers.Set("X-Forwarded-For", "66.249.66.1")
+	res, err := client.Get("http://google.com", headers)
+	if err != nil {
+		panic(err)
+	}
+
+	// Heimdall returns the standard *http.Response object
+	body, err := ioutil.ReadAll(res.Body)
+	//fmt.Println(string(body))
+	/*
+		resp, err := http.Get(url)
+		if err != nil {
+			log.Fatal(err)
+		}
+		defer resp.Body.Close()
+
+	*/
+	return c.SendString(string(body))
+}

handlers/proxy.go

@@ -0,0 +1,175 @@
+package handlers
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/gojek/heimdall/v7/httpclient"
+)
+
+type loggingTransport struct{}
+
+func (s *loggingTransport) RoundTrip(r *http.Request) (*http.Response, error) {
+
+	bytes, _ := httputil.DumpRequestOut(r, true)
+
+	resp, err := http.DefaultTransport.RoundTrip(r)
+	// err is returned after dumping the response
+
+	respBytes, _ := httputil.DumpResponse(resp, false)
+	bytes = append(bytes, respBytes...)
+
+	fmt.Printf("%s\n", bytes)
+
+	return resp, err
+}
+
+func FetchSite(c *fiber.Ctx) error {
+	// Get the url from the URL
+	urlQuery := c.Params("*")
+
+	u, err := url.Parse(urlQuery)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	log.Println(u.String())
+
+	if u.Scheme == "" {
+		u.Scheme = "https"
+	}
+
+	// Fetch the site
+	//resp, err := http.Get(url)
+	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")
+	//fmt.Println(c.GetReqHeaders()["Cookie"])
+	//req.Header.Set("Cookie", fmt.Sprint(c.GetReqHeaders()["Cookie"]))
+
+	//resp, err := http.DefaultClient.Do(req)
+	//client := &http.Client{}
+	//client.Timeout = time.Duration(5 * time.Second)
+
+	client := http.Client{}
+	client.Transport = &loggingTransport{}
+
+	fmt.Println("DEBUG1")
+	resp, err := client.Do(req)
+	fmt.Println("DEBUG2")
+
+	/*
+		timeout := 1000 * time.Millisecond
+		client := httpclient.NewClient(httpclient.WithHTTPTimeout(timeout))
+
+		headers := http.Header{}
+		headers.Set("User-Agent", "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")
+		headers.Set("X-Forwarded-For", "66.249.66.1")
+
+		fmt.Println("DEBUG1")
+		resp, err := client.Get(u.String(), headers)
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println("DEBUG2")
+	*/
+	if err != nil {
+		return c.SendString(err.Error())
+	}
+	defer resp.Body.Close()
+
+	bodyB, err := io.ReadAll(resp.Body)
+	if err != nil {
+		//log.Fatalln(err)
+		return c.SendString(err.Error())
+	}
+	body := string(bodyB)
+
+	imagePattern := `<img\s+([^>]*\s+)?src="(/)([^"]*)"`
+	re := regexp.MustCompile(imagePattern)
+	body = re.ReplaceAllString(body, fmt.Sprintf(`<img $1 src="%s$3"`, "/proxy/https://"+u.Host+"/"))
+
+	scriptPattern := `<script\s+([^>]*\s+)?src="(/)([^"]*)"`
+	reScript := regexp.MustCompile(scriptPattern)
+	body = reScript.ReplaceAllString(body, fmt.Sprintf(`<script $1 script="%s$3"`, "/proxy/https://"+u.Host+"/"))
+
+	//body = strings.ReplaceAll(body, "srcset=\"/", "srcset=\"/proxy/https://"+u.Host+"/")
+
+	//body = strings.ReplaceAll(body, "https://"+u.Host, "/proxy/https://"+u.Host)
+	body = strings.ReplaceAll(body, "href=\"/", "href=\"/proxy/https://"+u.Host+"/")
+	body = strings.ReplaceAll(body, "href=\"https://"+u.Host, "href=\"/proxy/https://"+u.Host+"/")
+	body = strings.ReplaceAll(body, "url('/", "url('/proxy/https://"+u.Host+"/")
+	body = strings.ReplaceAll(body, "url(/", "url(/proxy/https://"+u.Host+"/")
+
+	c.Set("Content-Type", resp.Header.Get("Content-Type"))
+	return c.SendString(body)
+}
+
+func ProxySite(c *fiber.Ctx) error {
+	// Get the url from the URL
+	urlQuery := c.Params("*")
+
+	u, err := url.Parse(urlQuery)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	log.Println(u.String())
+
+	// Fetch the site
+	//resp, err := http.Get(u.String())
+	/*
+		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)
+	*/
+
+	timeout := 1000 * time.Millisecond
+	client := httpclient.NewClient(httpclient.WithHTTPTimeout(timeout))
+
+	resp, err := client.Get(u.String(), nil)
+	if err != nil {
+		panic(err)
+	}
+
+	if err != nil {
+		return c.SendString(err.Error())
+	}
+	defer resp.Body.Close()
+
+	bodyB, err := io.ReadAll(resp.Body)
+	if err != nil {
+		//log.Fatalln(err)
+		return c.SendString(err.Error())
+	}
+	body := string(bodyB)
+
+	imagePattern := `<img\s+([^>]*\s+)?src="(/)([^"]*)"`
+	re := regexp.MustCompile(imagePattern)
+	body = re.ReplaceAllString(body, fmt.Sprintf(`<img $1 src="%s$3"`, "/proxy/https://"+u.Host+"/"))
+
+	scriptPattern := `<script\s+([^>]*\s+)?src="(/)([^"]*)"`
+	reScript := regexp.MustCompile(scriptPattern)
+	body = reScript.ReplaceAllString(body, fmt.Sprintf(`<script $1 script="%s$3"`, "/proxy/https://"+u.Host))
+
+	//body = strings.ReplaceAll(body, "srcset=\"/", "srcset=\"/https://"+u.Host+"/")
+	body = strings.ReplaceAll(body, "href=\"/", "href=\"/https://"+u.Host+"/")
+	body = strings.ReplaceAll(body, "url('/", "url('/https://"+u.Host+"/")
+	body = strings.ReplaceAll(body, "url(/", "url(/https://"+u.Host+"/")
+	body = strings.ReplaceAll(body, "href=\"https://"+u.Host, "href=\"/https://"+u.Host+"/")
+
+	c.Set("Content-Type", resp.Header.Get("Content-Type"))
+	return c.SendString(body)
+}

public/index.html

@@ -0,0 +1,60 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <title>Simple HTML Form</title>
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css">
+    <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+</head>
+    <style>
+        .logo-title {
+            font-family: 'Arial', sans-serif;
+            font-size: 2rem;
+            color: #2196F3;
+            margin-bottom: 20px;
+        }
+        .logo {
+            text-align: center;
+        }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <!--
+        <div class="logo">
+            <img src="logo.png" alt="Logo">
+        </div>
+        -->
+        <h1 class="center-align logo-title">Paywall ladddddddder</h1>
+        <form id="inputForm" class="col s12" method="get">
+            <div class="row">
+                <div class="input-field col s10">
+                    <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">send</i>
+                    </button>
+                </div>
+            </div>
+            <div class="row center-align">
+            </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>