more clicky stuff

Add support for PPC64 Little Endian, fix incorrect spelling in wrp.go and README.md

.gitignore

@@ -1 +0,0 @@
-.vscode

Changelog.md

@@ -1,36 +0,0 @@
-## [2.0] - 2017-05-10
-### Added
-- Support PyQt5 if available.
-- Sets title from original one.
-- Returns server errors as is.
-- Download non-HTML files as is.
-- For JavaScript capable browsers detect and automatically set view width.
-- Add support for configuring which image format to use.
-- Added support for PythonMagick. If found, allows to dither, color-reduce, or convert to grayscale or monochrome.
-- If PythonMagick is found, render as PNG and convert to user-requested format using it, for better quality.
-
-### Changed
-- Support www prepented to http://wrp.stop command.
-
-### Fixed
-- Prevent python crashes with non-ASCII character in URLs.
-
-## [1.4] - 2017-01-22
-### Added
-- Suport for ISMAP on Linux.
-- Use queues instead of globals in Linux.
-
-## [1.3] - 2017-01-21
-### Changed
-- Merged mac OS and Linux in a single executable.
-- Use queues instead of globals in Linux.
-
-### Fixed
-- Call PyQt to close application on http://wrp.stop
-
-## [1.2] - 2016-12-27
-### Added
-- Support for IMAP on mac OS.
-
-### Changed
-- Use queues instead of globals in mac OS.

LICENSE

@@ -0,0 +1,201 @@
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Makefile

@@ -0,0 +1,25 @@
+all: linux freebsd openbsd macos windows rpi
+
+linux: 
+	GOOS=linux GOARCH=amd64 go build -a -o wrp-linux wrp.go
+
+linux-ppc64le:
+	GOOS=linux GOARCH=ppc64le go build -a -o wrp-linux-ppc64le wrp.go
+
+rpi:
+	GOOS=linux GOARCH=arm go build -a -o wrp-linux-rpi wrp.go
+
+freebsd: 
+	GOOS=freebsd GOARCH=amd64 go build -a -o wrp-freebsd wrp.go
+
+openbsd: 
+	GOOS=openbsd GOARCH=amd64 go build -a -o wrp-openbsd wrp.go
+
+macos: 
+	GOOS=darwin GOARCH=amd64 go build -a -o wrp-macos wrp.go
+
+windows: 
+	GOOS=windows GOARCH=amd64 go build -a -o wrp-windows.exe wrp.go
+
+clean:
+	rm -rf wrp-linux wrp-freebsd wrp-openbsd wrp-macos wrp-windows.exe wrp-linux-rpi

README.md

@@ -1,31 +1,42 @@
 # 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/PNG/JPEG image associated with clickable imagemap of original web links. 
 
-New: Version 2.1 brings support for sslstrip to allow browsing https/SSL/TSL websites
+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.
 
+## Current Status
 
-# Current Status
-* SSL/TLS stripping is delegated to `sslstrip`[1], which you need to install into your PATH first
-* I'm also looking for moving away from WebKit, QT and Python
-* Stay tuned
+* This is the new GoLang/[ChdomeDP](https://github.com/chromedp/chromedp) version. 
+* It's still lacking some features of the [older version](/old) but far surpasses it in terms of stability and usability. 
+* It's beta quality but unlike the old version, it's now fully supported an maintained.
+* Currently works as browser-in-browser. A real http proxy mode is being investigated. Check [issue #35](https://github.com/tenox7/wrp/issues/35) for updates.
 
-## OS Support
-WRP works on macOS (Mac OS X), Linux and FreeBSD. On macOS it uses Cocoa Webkit, on Linux/FreeBSD QT Webkit, for which needs PyQT4 or PyQT5.
+## Usage	
 
-## Installation
-* macOS - should just work
-* Linux/FreeBSD install `python-pyqt5.qtwebkit`
-* For sslstrip install `sslstrip`
-* For PythonMagick (Imagemagick library) install `python-pythonmagick`
+1. [Download a WRP binary](https://github.com/tenox7/wrp/releases) and run it on a machine that will become your WRP server. 	
+2. Point your legacy browser to `http://address:port` of WRP server. Do not set or use it as a "Proxy Server" (yet).
+3. Type a search string or a http/https URL and click Go.	
+4. Adjust your screen width/height/scale/#colors to fit in your old browser.	
+5. For very very very old browsers such as Mosaic 2.x and IBM WebExplorer 1.x tick the I checkbox to enable ISMAP mode. However this normally should not be needed.	
+6. Scroll web page by clicking Up/Down. To go to top enter 0 and click Go.
 
-## Configuration
-Edit wrp.py, scroll past Copyright section to find config parameters
+![ncsa mosaic on reddit in 2019](wrp.png)
 
-## Usage 
-Configure your web browser to use HTTP proxy at IP address and port where WRP is running. If using browsers prior to HTML 3.2, ISMAP option may need to be enabled. Check configuration.
+## Flags
+```
+-l  listen address:port, default :8080
+-h  headed mode, display browser window
+-d  chromedp debug logging
+```
 
 ## More info and screenshots
 * http://virtuallyfun.superglobalmegacorp.com/2014/03/11/web-rendering-proxy-update/
 * http://virtuallyfun.superglobalmegacorp.com/2014/03/03/surfing-modern-web-with-ancient-browsers/
 
-[1]: https://moxie.org/software/sslstrip/
+## Credits 
+* Uses [chromedp](https://github.com/chromedp), thanks to [mvdan](https://github.com/mvdan) for dealing with my issues
+* Uses [go-quantize](https://github.com/ericpauley/go-quantize), thanks to [ericpauley](https://github.com/ericpauley) for developing the missing go quantizer
+* Thanks to Jason Stevens of [Fun With Virtualization](https://virtuallyfun.com/) for graciously hosting my rumblings
+
+## Legal Stuff
+License: Apache 2.0  
+Copyright (c) 2013-2018 Antoni Sawicki  
+Copyright (c) 2019 Google LLC

old/wrp.py

@@ -284,10 +284,10 @@ if sys.platform.startswith('linux') or sys.platform.startswith('freebsd'):
                 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\""
+                    httpout.write(("<AREA SHAPE=\"RECT\""
                                   " COORDS=\"%i,%i,%i,%i\""
                                   " ALT=\"%s\" HREF=\"%s\">\n".decode('utf-8', errors='ignore')
-                                  % (xmin, ymin, xmax, ymax, turl, turl))
+                                  % (xmin, ymin, xmax, ymax, turl, turl)).encode("utf-8"))
 
             if ISMAP != True:
                 httpout.write("</MAP>\n")

wrp.go

@@ -0,0 +1,262 @@
+//
+// WRP - Web Rendering Proxy
+//
+// Copyright (c) 2013-2018 Antoni Sawicki
+// Copyright (c) 2019 Google LLC
+//
+
+package main
+
+import (
+	"bytes"
+	"context"
+	"flag"
+	"fmt"
+	"image/gif"
+	"image/png"
+	"log"
+	"math/rand"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/chromedp/cdproto/emulation"
+
+	"github.com/chromedp/chromedp"
+
+	"github.com/ericpauley/go-quantize/quantize"
+)
+
+var (
+	version = "4.0"
+	srv     http.Server
+	ctx     context.Context
+	cancel  context.CancelFunc
+	gifmap  = make(map[string]bytes.Buffer)
+	ismap   = make(map[string]wrpReq)
+)
+
+type wrpReq struct {
+	U string  // url
+	W int64   // width
+	H int64   // height
+	S float64 // scale
+	C int64   // #colors
+	X int64   // mouseX
+	Y int64   // mouseY
+}
+
+func (w *wrpReq) parseForm(req *http.Request) {
+	req.ParseForm()
+	w.U = req.FormValue("url")
+	if len(w.U) > 1 && !strings.HasPrefix(w.U, "http") {
+		w.U = fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(w.U))
+	}
+	w.W, _ = strconv.ParseInt(req.FormValue("w"), 10, 64)
+	if w.W < 10 {
+		w.W = 1152
+	}
+	w.H, _ = strconv.ParseInt(req.FormValue("h"), 10, 64)
+	if w.H < 10 {
+		w.H = 600
+	}
+	w.S, _ = strconv.ParseFloat(req.FormValue("s"), 64)
+	if w.S < 0.1 {
+		w.S = 1.0
+	}
+	w.C, _ = strconv.ParseInt(req.FormValue("c"), 10, 64)
+	if w.C < 2 || w.C > 256 {
+		w.C = 256
+	}
+	log.Printf("WrpReq from Form: %+v\n", w)
+}
+
+func (w wrpReq) printPage(out http.ResponseWriter) {
+	out.Header().Set("Content-Type", "text/html")
+	fmt.Fprintf(out, "<!-- Web Rendering Proxy Version %s -->\n", version)
+	fmt.Fprintf(out, "<HTML>\n<HEAD><TITLE>WRP %s</TITLE></HEAD>\n<BODY BGCOLOR=\"#F0F0F0\">\n", w.U)
+	fmt.Fprintf(out, "<FORM ACTION=\"/\"><INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"40\">", w.U)
+	fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go\"> \n")
+	fmt.Fprintf(out, "W <INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w.W)
+	fmt.Fprintf(out, "H <INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", w.H)
+	fmt.Fprintf(out, "S <INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"3\"> \n", w.S)
+	fmt.Fprintf(out, "C <INPUT TYPE=\"TEXT\" NAME=\"c\" VALUE=\"%d\" SIZE=\"3\"> \n", w.C)
+	fmt.Fprintf(out, "</FORM><BR>\n")
+}
+
+func (w wrpReq) printFooter(out http.ResponseWriter) {
+	fmt.Fprintf(out, "\n<P><A HREF=\"/?url=https://github.com/tenox7/wrp/&w=%d&h=%d&s=%1.2f&c=%d\">"+
+		"Web Rendering Proxy Version %s</A> | <A HREF=\"/shutdown/\">Shutdown WRP</A></BODY>\n</HTML>\n", w.W, w.H, w.S, w.C, version)
+}
+
+func pageServer(out http.ResponseWriter, req *http.Request) {
+	log.Printf("%s Page Request for %s [%+v]\n", req.RemoteAddr, req.URL.Path, req.URL.RawQuery)
+	var w wrpReq
+	w.parseForm(req)
+
+	if len(w.U) > 4 {
+		w.capture(req.RemoteAddr, out)
+	} else {
+		w.printPage(out)
+		w.printFooter(out)
+	}
+}
+
+func mapServer(out http.ResponseWriter, req *http.Request) {
+	log.Printf("%s ISMAP Request for %s [%+v]\n", req.RemoteAddr, req.URL.Path, req.URL.RawQuery)
+	w, ok := ismap[req.URL.Path]
+	if !ok {
+		fmt.Fprintf(out, "Unable to find map %s\n", req.URL.Path)
+		log.Printf("Unable to find map %s\n", req.URL.Path)
+		return
+	}
+	defer delete(ismap, req.URL.Path)
+	n, err := fmt.Sscanf(req.URL.RawQuery, "%d,%d", &w.X, &w.Y)
+	if err != nil || n != 2 {
+		fmt.Fprintf(out, "n=%d, err=%s\n", n, err)
+		log.Printf("%s ISMAP n=%d, err=%s\n", req.RemoteAddr, n, err)
+		return
+	}
+	log.Printf("%s WrpReq from ISMAP: %+v\n", req.RemoteAddr, w)
+	if len(w.U) > 4 {
+		w.capture(req.RemoteAddr, out)
+	} else {
+		w.printPage(out)
+		w.printFooter(out)
+	}
+}
+
+func imgServer(out http.ResponseWriter, req *http.Request) {
+	log.Printf("%s IMG Request for %s\n", req.RemoteAddr, req.URL.Path)
+	gifbuf, ok := gifmap[req.URL.Path]
+	if !ok || gifbuf.Bytes() == nil {
+		fmt.Fprintf(out, "Unable to find image %s\n", req.URL.Path)
+		log.Printf("Unable to find image %s\n", req.URL.Path)
+		return
+	}
+	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 (w wrpReq) capture(c string, out http.ResponseWriter) {
+	var pngbuf []byte
+	var gifbuf bytes.Buffer
+	var loc string
+	var err error
+
+	// Navigate to page or process click request
+	if w.X > 0 && w.Y > 0 {
+		log.Printf("%s Mouse Click %d,%d\n", c, w.X, w.Y)
+		chromedp.Run(ctx,
+			chromedp.MouseClickXY(int64(float64(w.X)/w.S), int64(float64(w.Y)/w.S)),
+			chromedp.Sleep(time.Second*3),
+			chromedp.Location(&loc))
+	} else {
+		log.Printf("%s Processing Capture Request for %s\n", c, w.U)
+		err = chromedp.Run(ctx,
+			emulation.SetDeviceMetricsOverride(int64(float64(w.W)/w.S), int64(float64(w.H)/w.S), w.S, false),
+			chromedp.Navigate(w.U),
+			chromedp.Sleep(time.Second*3),
+			chromedp.Location(&loc))
+	}
+
+	if err != nil {
+		if err.Error() == "context canceled" {
+			log.Printf("%s Contex cancelled, try again", c)
+			fmt.Fprintf(out, "<BR>%s<BR> -- restarting, try again", err)
+			ctx, cancel = chromedp.NewContext(context.Background())
+		} else {
+			log.Printf("%s %s", c, err)
+			fmt.Fprintf(out, "<BR>%s<BR>", err)
+		}
+		return
+	}
+
+	log.Printf("%s Landed on: %s\n", c, loc)
+	w.U = loc
+	w.printPage(out)
+
+	// Process Screenshot Image
+	err = chromedp.Run(ctx, chromedp.CaptureScreenshot(&pngbuf))
+	if err != nil {
+		log.Printf("%s Failed to capture screenshot: %s\n", c, err)
+		fmt.Fprintf(out, "<BR>Unable to capture screenshot:<BR>%s<BR>\n", err)
+		return
+	}
+	bytes.NewReader(pngbuf).Seek(0, 0)
+	img, err := png.Decode(bytes.NewReader(pngbuf))
+	if err != nil {
+		log.Printf("%s Failed to decode screenshot: %s\n", c, err)
+		fmt.Fprintf(out, "<BR>Unable to decode page screenshot:<BR>%s<BR>\n", err)
+		return
+	}
+	gifbuf.Reset()
+	err = gif.Encode(&gifbuf, img, &gif.Options{NumColors: int(w.C), Quantizer: quantize.MedianCutQuantizer{}})
+	if err != nil {
+		log.Printf("%s Failed to encode GIF: %s\n", c, err)
+		fmt.Fprintf(out, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
+		return
+	}
+
+	// Compose map and gif
+	seq := rand.Intn(9999)
+	imgpath := fmt.Sprintf("/img/%04d.gif", seq)
+	mappath := fmt.Sprintf("/map/%04d.map", seq)
+	gifmap[imgpath] = gifbuf
+	ismap[mappath] = w
+	log.Printf("%s Encoded GIF image: %s, Size: %dKB, Colors: %d\n", c, imgpath, len(gifbuf.Bytes())/1024, w.C)
+	fmt.Fprintf(out, "<A HREF=\"%s\"><IMG SRC=\"%s\" ALT=\"wrp\" BORDER=\"0\" ISMAP></A>", mappath, imgpath)
+	w.printFooter(out)
+	log.Printf("%s Done with caputure for %s\n", c, w.U)
+}
+
+func haltServer(out http.ResponseWriter, req *http.Request) {
+	log.Printf("%s Shutdown Request for %s\n", req.RemoteAddr, req.URL.Path)
+	defer cancel()
+	srv.Shutdown(context.Background())
+}
+
+func main() {
+	var addr string
+	var head, headless bool
+	var debug bool
+	flag.StringVar(&addr, "l", ":8080", "Listen address:port, default :8080")
+	flag.BoolVar(&head, "h", false, "Headed mode - display browser window")
+	flag.BoolVar(&debug, "d", false, "Debug ChromeDP")
+	flag.Parse()
+	if head {
+		headless = false
+	} else {
+		headless = true
+	}
+	opts := append(chromedp.DefaultExecAllocatorOptions[:],
+		chromedp.Flag("headless", headless),
+		chromedp.Flag("hide-scrollbars", false),
+	)
+	actx, cancel := chromedp.NewExecAllocator(context.Background(), opts...)
+	defer cancel()
+	if debug {
+		ctx, cancel = chromedp.NewContext(actx, chromedp.WithDebugf(log.Printf))
+	} else {
+		ctx, cancel = chromedp.NewContext(actx)
+	}
+	defer cancel()
+	rand.Seed(time.Now().UnixNano())
+	http.HandleFunc("/", pageServer)
+	http.HandleFunc("/map/", mapServer)
+	http.HandleFunc("/img/", imgServer)
+	http.HandleFunc("/shutdown/", haltServer)
+	http.HandleFunc("/favicon.ico", http.NotFound)
+	log.Printf("Web Rendering Proxy Version %s\n", version)
+	log.Printf("Starting WRP http server on %s\n", addr)
+	srv.Addr = addr
+	err := srv.ListenAndServe()
+	if err != nil {
+		log.Fatal(err)
+	}
+}