readme fix

support https:// sites by stripping with sslstrip

LICENSE

@@ -0,0 +1,201 @@
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README

@@ -1,7 +0,0 @@
-WRP is a HTTP proxy service that renders the web page in to a GIF/JPEG image associated with clickable imagemap of the original web links. It allows to use historical and obsolete web browsers on the modern web. It's still a work in progress but it's quite stable and usable for casual web browsing.
-
-WRP supports Mac OS X and Linux. It requires Python 2.7 and under Linux, PyQT4.
-
-More info and screenshots: http://virtuallyfun.superglobalmegacorp.com/2014/03/11/web-rendering-proxy-update/
-
-Even more screenshots: http://virtuallyfun.superglobalmegacorp.com/2014/03/03/surfing-modern-web-with-ancient-browsers/

README.md

@@ -0,0 +1,32 @@
+# WRP - Web Rendering Proxy
+
+A HTTP proxy server that allows to use historical and obsolete web browsers on the modern web. It works by rendering the web page in to a GIF image associated with clickable imagemap of original web links.
+
+**You are looking at a GoLang / CDP branch of WRP.**
+
+**This code is under active development and not fully usable yet.**
+
+## Done so far
+
+* basic browser-in-browser mode
+* screenshot and serve image+map via CDP
+* gif with Floyd–Steinberg dithering
+* random image addressing
+* resolve relative links
+* paginated scrolling
+* google search on input not starting with ^http
+
+## Todo
+
+* ISMAP - underway
+* net/url: invalid control character in URL on Windows
+* configurable color palete and quantization
+* real http proxy support
+* option to encode as png/jpeg
+* padded box model coordinates
+* better http server shutdown
+* chromedp logging, timeout, non-headless flags
+
+## Python version
+
+Check [master branch](https://github.com/tenox7/wrp/tree/master) for "stable" Python-Webkit version.

pywebkit/wrp.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python2.7
 
-# wrp.py - Web Rendering Proxy
+# wrp.py - Web Rendering Proxy - https://github.com/tenox7/wrp
 # A HTTP proxy service that renders the requested URL in to a image associated
 # with an imagemap of clickable links. This is an adaptation of previous works by
 # picidae.net and Paul Hammond.
@@ -9,15 +9,16 @@ __version__ = "2.0"
 
 #
 # This program is based on the software picidae.py from picidae.net
-# It was modified by Antoni Sawicki http://www.tenox.net/out/#wrp
+# It was modified by Antoni Sawicki and Natalia Portillo
 #
 # This program is based on the software webkit2png from Paul Hammond.
 # It was extended by picidae.net
 #
-# Copyright (c) 2013-2014 Antoni Sawicki
+# Copyright (c) 2013-2018 Antoni Sawicki
 # Copyright (c) 2012-2013 picidae.net
 # Copyright (c) 2004-2013 Paul Hammond
-# Copyright (c) 2017      Natalia Portillo
+# Copyright (c) 2017-2018 Natalia Portillo
+# Copyright (c) 2018      //gir.st/
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -39,20 +40,21 @@ __version__ = "2.0"
 #
 
 # Configuration options:
-PORT   = 8080
-WIDTH  = 1024
-HEIGHT = 768
-ISMAP  = "true"
-WAIT    = 1  # sleep for 1 second to allow javascript renders
-QUALITY = 75 # For JPEG: image quality 0-100; For PNG: sets compression level (leftmost digit 0 fastest, 9 best)
+PORT      = 8080
+WIDTH     = 1024
+HEIGHT    = 768
+ISMAP     = False # ISMAP=True is Server side for Mosaic 1.1 and up. HTML 3.2 supports Client side maps (ISMAP=False)
+WAIT      = 1  # sleep for 1 second to allow javascript renders
+QUALITY   = 75 # For JPEG: image quality 0-100; For PNG: sets compression level (leftmost digit 0 fastest, 9 best)
 AUTOWIDTH = True # Check for browser width using javascript
-FORMAT = "AUTO" # AUTO = GIF for mac OS, JPG for rest; PNG, GIF, JPG as supported values.
+FORMAT    = "AUTO" # AUTO = GIF for mac OS, JPG for rest; PNG, GIF, JPG as supported values.
+SSLSTRIP  = True # enable to automatically downgrade secure requests
 
 # PythonMagick configuration options
 MK_MONOCHROME = False # Convert the render to a black and white dithered image
-MK_GRAYSCALE = False # Convert the render to a grayscal dithered image
-MK_COLORS = 0 # Reduce number of colors in the image. 0 for not reducing. Less than 256 works in grayscale also.
-MK_DITHER = False # Dither the image to reduce size. GIFs will always be dithered. Ignored if MK_COLORS is not set.
+MK_GRAYSCALE  = False # Convert the render to a grayscal dithered image
+MK_COLORS     = 0   # Reduce number of colors in the image. 0 for not reducing. Less than 256 works in grayscale also.
+MK_DITHER     = False # Dither the image to reduce size. GIFs will always be dithered. Ignored if MK_COLORS is not set.
 
 import re
 import random
@@ -68,6 +70,7 @@ import Queue
 import sys
 import logging
 import StringIO
+import subprocess
 
 try:
     import PythonMagick
@@ -86,7 +89,7 @@ RENDERS = {}
 ### Linux CODEPATH ###
 #######################
 
-if sys.platform == "linux" or sys.platform == "linux2":
+if sys.platform.startswith('linux') or sys.platform.startswith('freebsd'):
     try:
         from PyQt5.QtCore import *
         from PyQt5.QtGui import *
@@ -265,7 +268,7 @@ if sys.platform == "linux" or sys.platform == "linux2":
             if AUTOWIDTH:
                 httpout.write("<script>document.write('<span style=\"display: none;\"><img src=\"http://width-' + document.body.clientWidth + '-px.jpg\" width=\"0\" height=\"0\"></span>');</script>\n")
 
-            if ISMAP == "true":
+            if ISMAP == True:
                 httpout.write("<A HREF=\"http://%s\">"
                               "<IMG SRC=\"http://%s\" ALT=\"wrp-render\" ISMAP>\n"
                               "</A>\n" % (WebkitRenderer.req_map, WebkitRenderer.req_img))
@@ -278,7 +281,7 @@ if sys.platform == "linux" or sys.platform == "linux2":
             for x in frame.findAllElements('a'):
                 turl = QUrl(web_url).resolved(QUrl(x.attribute('href'))).toString()
                 xmin, ymin, xmax, ymax = x.geometry().getCoords()
-                if ISMAP == "true":
+                if ISMAP == True:
                     mapfile.write("rect %s %i,%i %i,%i\n".decode('utf-8', errors='ignore') % (turl, xmin, ymin, xmax, ymax))
                 else:
                     httpout.write("<AREA SHAPE=\"RECT\""
@@ -286,12 +289,12 @@ if sys.platform == "linux" or sys.platform == "linux2":
                                   " ALT=\"%s\" HREF=\"%s\">\n".decode('utf-8', errors='ignore')
                                   % (xmin, ymin, xmax, ymax, turl, turl))
 
-            if ISMAP != "true":
+            if ISMAP != True:
                 httpout.write("</MAP>\n")
 
             httpout.write("</BODY>\n</HTML>\n")
 
-            if ISMAP == "true":
+            if ISMAP == True:
                 RENDERS[WebkitRenderer.req_map] = mapfile
 
             return image
@@ -665,7 +668,7 @@ elif sys.platform == "darwin":
                 if AUTOWIDTH:
                     httpout.write("<script>document.write('<span style=\"display: none;\"><img src=\"http://width-' + document.body.clientWidth + '-px.jpg\" width=\"0\" height=\"0\"></span>');</script>\n")
 
-                if ISMAP == "true":
+                if ISMAP == True:
                     httpout.write("<A HREF=\"http://%s\">"
                                   "<IMG SRC=\"http://%s\" ALT=\"wrp-render\" ISMAP>\n"
                                   "</A>\n" % (WebkitLoad.req_map, WebkitLoad.req_img))
@@ -687,7 +690,7 @@ elif sys.platform == "darwin":
                     xmax = Foundation.NSMaxX(myrect)
                     ymax = Foundation.NSMaxY(myrect)
 
-                    if ISMAP == "true":
+                    if ISMAP == True:
                         mapfile.write("rect %s %i,%i %i,%i\n".decode('utf-8', errors='ignore') % (turl, xmin, ymin, xmax, ymax))
                     else:
                         httpout.write("<AREA SHAPE=\"RECT\""
@@ -697,12 +700,12 @@ elif sys.platform == "darwin":
 
                     i += 1
 
-                if ISMAP != "true":
+                if ISMAP != True:
                     httpout.write("</MAP>\n")
 
                 httpout.write("</BODY>\n</HTML>\n")
 
-                if ISMAP == "true":
+                if ISMAP == True:
                     RENDERS[WebkitLoad.req_map] = mapfile
 
                 # Return to Proxy thread and Loop...
@@ -861,7 +864,7 @@ class Proxy(SimpleHTTPServer.SimpleHTTPRequestHandler):
                         req_extension = ".jpg"
                     elif FORMAT == "PNG":
                         req_extension = ".png"
-                    elif (sys.platform == "linux" or sys.platform == "linux2") and FORMAT == "AUTO":
+                    elif (sys.platform.startswith('linux') or sys.platform.startswitch('freebsd')) and FORMAT == "AUTO":
                         req_extension = ".jpg"
                     elif sys.platform == "darwin" and FORMAT == "AUTO":
                         req_extension = ".gif"
@@ -891,13 +894,23 @@ def main():
     if(FORMAT != "AUTO" and FORMAT != "GIF" and FORMAT != "JPG" and FORMAT != "PNG"):
         sys.exit("Unsupported image format \"%s\". Exiting." % FORMAT)
 
-    if (sys.platform == "linux" or sys.platform == "linux2") and FORMAT == "GIF" and not HasMagick:
+    if (sys.platform.startswith('linux') or sys.platform.startswith('freebsd')) and FORMAT == "GIF" and not HasMagick:
         sys.exit("GIF format is not supported on this platform. Exiting.")
 
+    # run traffic through sslstrip as a quick workaround for getting SSL webpages to work
+    # NOTE: modern browsers are doing their best to stop this kind of 'attack'. Firefox 
+    # supports an about:config flag test.currentTimeOffsetSeconds(int) = 12000000, which 
+    # you can use to circumvent those checks.
+    if SSLSTRIP:
+        try:
+            subprocess.check_output(["pidof", "sslstrip"])
+        except:
+            subprocess.Popen(["sslstrip"], stdout=open(os.devnull,'w'), stderr=subprocess.STDOUT) # runs on port 10000 by default
+        QNetworkProxy.setApplicationProxy(QNetworkProxy(QNetworkProxy.HttpProxy, "localhost", 10000))
     # Launch Proxy Thread
     threading.Thread(target=run_proxy).start()
 
-    if sys.platform == "linux" or sys.platform == "linux2":
+    if sys.platform.startswith('linux') or sys.platform.startswith('freebsd'):
         import signal
         try:
             import PyQt5.QtCore

wrp.go

@@ -0,0 +1,219 @@
+//
+// WRP - Web Rendering Proxy
+//
+// Copyright (c) 2013-2018 Antoni Sawicki
+// Copyright (c) 2019 Google LLC
+//
+
+package main
+
+import (
+	"bytes"
+	"context"
+	"flag"
+	"fmt"
+	_ "image"
+	"image/gif"
+	"image/png"
+	"log"
+	"math/rand"
+	"net/http"
+	"net/url"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/chromedp/cdproto/emulation"
+	"github.com/chromedp/cdproto/runtime"
+
+	"github.com/chromedp/cdproto/cdp"
+	"github.com/chromedp/cdproto/dom"
+	"github.com/chromedp/chromedp"
+)
+
+var (
+	ctx    context.Context
+	cancel context.CancelFunc
+	gifmap = make(map[string]bytes.Buffer)
+)
+
+func pageServer(out http.ResponseWriter, r *http.Request) {
+	r.ParseForm()
+	u := r.FormValue("url")
+	var istr string
+	var i bool
+	if r.FormValue("i") == "on" {
+		istr = "CHECKED"
+		i = true
+	} else {
+		istr = ""
+		i = false
+	}
+	p, _ := strconv.ParseInt(r.FormValue("p"), 10, 64)
+	if r.FormValue("pg") == ">>" {
+		p++
+	} else if r.FormValue("pg") == "<<" {
+		p--
+	} else {
+		p = 0
+	}
+	w, _ := strconv.ParseInt(r.FormValue("w"), 10, 64)
+	if w < 10 {
+		w = 1024
+	}
+	h, _ := strconv.ParseInt(r.FormValue("h"), 10, 64)
+	if h < 10 {
+		h = 768
+	}
+	s, _ := strconv.ParseFloat(r.FormValue("s"), 64)
+	if s < 0.1 {
+		s = 1.0
+	}
+	log.Printf("%s Page Reqest for url=\"%s\" [%s]\n", r.RemoteAddr, u, r.URL.Path)
+	out.Header().Set("Content-Type", "text/html")
+	fmt.Fprintf(out, "<HTML>\n<HEAD><TITLE>WRP %s</TITLE></HEAD>\n<BODY BGCOLOR=\"#F0F0F0\">", u)
+	fmt.Fprintf(out, "<FORM ACTION=\"/\">URL/Search: <INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"40\">", u)
+	fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go\"><P>\n")
+	fmt.Fprintf(out, "ISMAP:<INPUT TYPE=\"CHECKBOX\" NAME=\"i\" %s> \n", istr)
+	fmt.Fprintf(out, "Width:<INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w)
+	fmt.Fprintf(out, "Height:<INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", h)
+	fmt.Fprintf(out, "Scale:<INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"3\"> \n", s)
+	fmt.Fprintf(out, "Page:<INPUT TYPE=\"HIDDEN\" NAME=\"p\" VALUE=\"%d\"> \n", p)
+	fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"<<\"> %d \n", p)
+	fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\">>\"> \n")
+	fmt.Fprintf(out, "</FORM><P>\n")
+	if len(u) > 4 {
+		if strings.HasPrefix(u, "http") {
+			capture(u, w, h, s, p, i, out)
+		} else {
+			capture(fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(u)), w, h, s, p, i, out)
+		}
+	} else {
+		fmt.Fprintf(out, "No URL or search query specified")
+	}
+	fmt.Fprintf(out, "</BODY>\n</HTML>\n")
+}
+
+func imgServer(out http.ResponseWriter, req *http.Request) {
+	log.Printf("%s IMG Request for %s\n", req.RemoteAddr, req.URL.Path)
+	gifbuf := gifmap[req.URL.Path]
+	defer delete(gifmap, req.URL.Path)
+	out.Header().Set("Content-Type", "image/gif")
+	out.Header().Set("Content-Length", strconv.Itoa(len(gifbuf.Bytes())))
+	out.Write(gifbuf.Bytes())
+	out.(http.Flusher).Flush()
+}
+
+func mapServer(out http.ResponseWriter, req *http.Request) {
+	log.Printf("%s MAP Request for %s [%v]\n", req.RemoteAddr, req.URL.Path, req.URL.Query())
+}
+
+
+func haltServer(out http.ResponseWriter, req *http.Request) {
+	log.Printf("%s Shutdown request received [%s]\n", req.RemoteAddr, req.URL.Path)
+	out.Header().Set("Content-Type", "text/plain")
+	fmt.Fprintf(out, "WRP Shutdown")
+	out.(http.Flusher).Flush()
+	cancel()
+	os.Exit(0)
+}
+
+func capture(gourl string, w int64, h int64, s float64, p int64, ismap bool, out http.ResponseWriter) {
+	var nodes []*cdp.Node
+	ctxx := chromedp.FromContext(ctx)
+	var pngbuf []byte
+	var gifbuf bytes.Buffer
+	var loc string
+	var res *runtime.RemoteObject
+
+	log.Printf("Processing Caputure Request for %s\n", gourl)
+
+	// Run ChromeDP Magic
+	err := chromedp.Run(ctx,
+		emulation.SetDeviceMetricsOverride(w, h, s, false),
+		chromedp.Navigate(gourl),
+		chromedp.Evaluate(fmt.Sprintf("window.scrollTo(0, %d);", p*int64(float64(h)*float64(0.9))), &res),
+		chromedp.Sleep(time.Second*1),
+		chromedp.CaptureScreenshot(&pngbuf),
+		chromedp.Location(&loc),
+		chromedp.Nodes("a", &nodes, chromedp.ByQueryAll))
+
+	if err != nil {
+		log.Printf("%s", err)
+		fmt.Fprintf(out, "<BR>%s<BR>", err)
+		return
+	}
+
+	log.Printf("Landed on: %s, Nodes: %d\n", loc, len(nodes))
+
+	// Process Screenshot Image
+	bytes.NewReader(pngbuf).Seek(0, 0)
+	img, err := png.Decode(bytes.NewReader(pngbuf))
+	if err != nil {
+		log.Printf("Failed to decode screenshot: %s\n", err)
+		fmt.Fprintf(out, "<BR>Unable to decode page screenshot:<BR>%s<BR>\n", err)
+		return
+	}
+	gifbuf.Reset()
+	err = gif.Encode(&gifbuf, img, nil)
+	if err != nil {
+		log.Printf("Failed to encode GIF: %s\n", err)
+		fmt.Fprintf(out, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
+		return
+	}
+	imgpath := fmt.Sprintf("/img/%04d.gif", rand.Intn(9999))
+	log.Printf("Encoded GIF image: %s, Size: %dKB\n", imgpath, len(gifbuf.Bytes())/1024)
+	gifmap[imgpath] = gifbuf
+
+	// Process Nodes
+	base, _ := url.Parse(loc)
+	if ismap {
+		fmt.Fprintf(out, "<A HREF=\"/map/123.map\"><IMG SRC=\"%s\" ALT=\"wrp\" ISMAP></A>", imgpath)
+	} else {
+		fmt.Fprintf(out, "<IMG SRC=\"%s\" ALT=\"wrp\" USEMAP=\"#map\">\n<MAP NAME=\"map\">\n", imgpath)
+	}
+
+	for _, n := range nodes {
+		b, err := dom.GetBoxModel().WithNodeID(n.NodeID).Do(cdp.WithExecutor(ctx, ctxx.Target))
+		if err != nil {
+			continue
+		}
+		tgt, err := base.Parse(n.AttributeValue("href"))
+		if err != nil {
+			continue
+		}
+		target := fmt.Sprintf("/?url=%s&w=%d&h=%d&s=%1.2f&", tgt, w, h, s) // no page# here
+
+		if len(b.Content) > 6 && len(target) > 7 {
+			if ismap {
+
+			} else {
+			fmt.Fprintf(out, "<AREA SHAPE=\"RECT\" COORDS=\"%.f,%.f,%.f,%.f\" ALT=\"%s\" TITLE=\"%s\" HREF=\"%s\">\n",
+				b.Content[0]*s, b.Content[1]*s, b.Content[4]*s, b.Content[5]*s, n.AttributeValue("href"), n.AttributeValue("href"), target)
+			}
+		}
+	}
+
+	if !ismap {
+		fmt.Fprintf(out, "</MAP>\n")
+	}
+	out.(http.Flusher).Flush()
+	log.Printf("Done with caputure for %s\n", gourl)
+}
+
+func main() {
+	ctx, cancel = chromedp.NewContext(context.Background())
+	defer cancel()
+	var addr string
+	flag.StringVar(&addr, "l", ":8080", "Listen address:port, default :8080")
+	flag.Parse()
+	rand.Seed(time.Now().UnixNano())
+	http.HandleFunc("/", pageServer)
+	http.HandleFunc("/img/", imgServer)
+	http.HandleFunc("/map/", mapServer)
+	http.HandleFunc("/favicon.ico", http.NotFound)
+	http.HandleFunc("/halt", haltServer)
+	log.Printf("Starting WRP http server on %s\n", addr)
+	http.ListenAndServe(addr, nil)
+}