add 32bit windows target

add support for monochrome 2 colors

.gitignore

@@ -0,0 +1,4 @@
+wrp-*
+wrp
+wrp.exe
+statik

Dockerfile

@@ -0,0 +1,5 @@
+FROM chromedp/headless-shell
+ADD wrp /wrp
+ENTRYPOINT ["/wrp"]
+ENV PATH="/headless-shell:${PATH}"
+LABEL maintainer="as@tenoware.com"

Makefile

@@ -1,22 +1,30 @@
-all: linux freebsd openbsd macos windows rpi
+all: wrp
 
-linux: 
-	GOOS=linux GOARCH=amd64 go build -a -o wrp-linux wrp.go
+wrp: wrp.go statik
+	go build wrp.go
 
-freebsd: 
-	GOOS=freebsd GOARCH=amd64 go build -a -o wrp-freebsd wrp.go
+cross: statik
+	GOOS=linux GOARCH=amd64 go build -a -o wrp-amd64-linux wrp.go
+	GOOS=freebsd GOARCH=amd64 go build -a -o wrp-amd64-freebsd wrp.go
+	GOOS=openbsd GOARCH=amd64 go build -a -o wrp-amd64-openbsd wrp.go
+	GOOS=darwin GOARCH=amd64 go build -a -o wrp-amd64-macos wrp.go
+	GOOS=windows GOARCH=amd64 go build -a -o wrp-amd64-windows.exe wrp.go
+	GOOS=windows GOARCH=386 go build -a -o wrp-386-windows.exe wrp.go
+	GOOS=linux GOARCH=arm go build -a -o wrp-arm-linux wrp.go
+	GOOS=linux GOARCH=arm64 go build -a -o wrp-arm64-linux wrp.go
 
-openbsd: 
-	GOOS=openbsd GOARCH=amd64 go build -a -o wrp-openbsd wrp.go
+statik: wrp.html
+	go generate
 
-macos: 
-	GOOS=darwin GOARCH=amd64 go build -a -o wrp-macos wrp.go
+docker: wrp
+	docker build -t tenox7/wrp:latest .
 
-windows: 
-	GOOS=windows GOARCH=amd64 go build -a -o wrp-windows.exe wrp.go
+dockerhub:
+	docker push tenox7/wrp:latest
 
-rpi:
-	GOOS=linux GOARCH=arm go build -a -o wrp-linux-rpi wrp.go
+gcrio:
+	docker tag tenox7/wrp:latest gcr.io/tenox7/wrp
+	docker push gcr.io/tenox7/wrp
 
 clean:
-	rm -rf wrp-linux wrp-freebsd wrp-openbsd wrp-macos wrp-windows.exe wrp-linux-rpi
+	rm -rf wrp-* wrp statik

README.md

@@ -1,36 +1,135 @@
 # 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.
+A browser-in-browser "proxy" server that allows to use historical / vintage web browsers on the modern web. It works by rendering a web page in to a GIF or PNG image with clickable imagemap.
 
-## Current Status
-
-* This is the new GoLang/ChdomeDP version.
-* It's still lacking some features of the [older version](/old) (such as real http proxy mode and image manipulation) but it surpases it in terms of stability and usability. 
-* It's beta quality but I can fix/maintain the code unlike the older version.
-
-## Todo
-
-* Configurable color palete and quantization.
-* Real http proxy support via [goproxy](https://github.com/elazarl/goproxy) - if you really need a real proxy, for now use the [old/](/old) version.
-* Padded box model coordinates.
-* Input boxes support. However today you can cheat by using headed mode and input your data on the WRP server.
+![Internet Explorer 1.5 doing Gmail](wrp.png)
 
 ## Usage
 
-1. [Download a WRP binary](https://github.com/tenox7/wrp/releases) and run on a  server/gateway. 
-2. Point your legacy browser to the IP address:port of WRP server.
-3. Type a search string or a http/https URL and click Go.
-4. Adjust your screen width/heigh/scale to fit in your old browser.
-5. For very very very old browsers such as Mosaic 2.x and IBM WebExplorer 1.x check 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.
+* [Download a WRP binary](https://github.com/tenox7/wrp/releases/) and run it on a machine that will become your WRP gateway/server. 
+This machine should be pretty modern, high spec and Google Chrome / Chromium Browser is required to be preinstalled.
+* Point your legacy browser to `http://address:port` of WRP server. Do not set or use it as a "proxy server".
+* Type a search string or a http/https URL and click **Go**.
+* Adjust your screen **W**idth/**H**eight/**S**cale/**C**olors to fit in your old browser.
+* Scroll web page by clicking on the in-image scroll bar.
+* Do not use client browser history-back, instead use **Bk** button in the app.
+* To send keystrokes, fill **K** input box and press **Go**. There also are buttons for backspace, enter and arrow keys.
+* You can set height **H** to `0` to render pages in to **a single tall image without the vertical scrollbar** and use client scrolling. However this should not be used with old and low spec clients. Such tall images will be very large and take long time to process, especially for GIFs.
+* Prefer PNG over GIF if your browser supports it. PNG is much faster, whereas GIF requires a lot of additional processing on both client and server.
+* You can re-capture page screenshot without reloading by using **St** (Stop).
+* You can also reload and re-capture current page with **Re** (Reload).
+
+## Customization
+
+Since 4.5.1 WRP supports customizing it's own UI using HTML Template file. Download [wrp.html](wrp.html) place in the same directory with wrp binary customize it to your liking.
+
+## Docker
+
+```shell
+$ docker run -d -p 80:8080 tenox7/wrp
+```
+
+## Google Cloud Run
+
+```shell
+$ gcloud run deploy --platform managed --image=gcr.io/tenox7/wrp:latest --memory=2Gi --args='-t=png','-g=1280x0x256'
+```
+
+Or from [Gcloud Console](https://console.cloud.google.com/run). Use `gcr.io/tenox7/wrp:latest` as container image URL.
+
+Note that unfortunately GCR forces https. Your browser support of encryption protocols and certification authorities will vary. 
+
+## Azure Container Instances
+
+```shell
+$ az container create --resource-group wrp --name wrp --image gcr.io/tenox7/wrp:latest --cpu 1 --memory 2 --ports 80 --protocol tcp --os-type Linux --ip-address Public --command-line '/wrp -l :80 -t png -g 1280x0x256'
+```
+
+Or from the [Azure Console](https://portal.azure.com/#create/Microsoft.ContainerInstances). Use `gcr.io/tenox7/wrp:latest` or `tenox7/wrp:latest` for image name.
+
+Fortunately ACI allows port 80 without encryption.
+
 
 ## Flags
+
 ```
--l  listen address:port, default :8080
--h  headed mode, display browser window
--d  chromedp debug logging
+-l  listen address:port (default :8080)
+-t  image type gif or png (default gif) 
+-g  image geometry, WxHxC, height can be 0 for unlimited (default 1152x600x256)
+-h  headless mode, hide browser window on the server (default true)
+-d  chromedp debug logging (default false)
+-n  do not free maps and gif images after use (default false)
 ```
 
-## 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/
+## UI explanation
+
+The first unnamed input box is either search (google) or URL starting with http/https
+
+**Go** instructs browser to navigate to the url or perform search
+
+**Bk** is History Back
+
+**St** is Stop, also re-capture screenshot without refreshing page, for example if page
+render takes a long time or it changes periodically
+
+**Re** is Reload
+
+**W** is width in pixels, adjust it to get rid of horizontal scroll bar
+
+**H** is height in pixels, adjust it to get rid of vertical scroll bar.
+It can also be set to 0 to produce one very tall image and use
+client scroll. This 0 size is experimental, buggy and should be
+used with PNG and lots of memory on a client side.
+
+**Z** is zoom or scale
+
+**C** is colors, for GIF images only (unused in PNG)
+
+**K** is keystroke input, you can type some letters in it and when you click Go it will be typed in the remote browser.
+
+**Bs** is backspace
+
+**Rt** is return / enter
+
+**< ^ v >** are arrow keys, typically for navigating a map, buggy.
+
+## Minimal Requirements
+
+* Server/Gateway requires modern hardware and operating system that is supported by [Go language](https://github.com/golang/go/wiki/MinimumRequirements) and Chrome/Chromium Browser, which must be installed.
+* Client Browser needs to support `HTML FORMs` and `ISMAP`. Typically [Mosaic 2.0](http://www.ncsa.illinois.edu/enabling/mosaic/versions) would be minimum version for forms. However ISMAP was supported since 0.6B, so if you manually enter url using `?url=...`, you can use the earlier version.
+
+## Troubleshooting
+
+### I can't get it to run
+
+This program does not have a GUI and is run from the command line. You may need to enable executable bit on Unix systems, for example:
+
+```bash
+$ cd ~/Downloads
+$ chmod +x wrp-amd64-macos
+$ ./wrp-amd64-macos -t png
+```
+
+## History
+
+* Version 1.0 (2014) started as a *cgi-bin* script, adaptation of `webkit2png.py` and `pcidade.py`, [blog post](https://virtuallyfun.com/2014/03/03/surfing-modern-web-with-ancient-browsers/).
+* Version 2.0 became a stand alone http-proxy server, supporting both Linux and MacOS, [another post](https://virtuallyfun.com/wordpress/2014/03/11/web-rendering-proxy-update//).
+* In 2016 thanks to EFF/Certbot the whole internet migrated to HTTPS/SSL/TLS and WRP largely stopped working. Python code became unmaintainable and there was no easy way to make it work on Windows, even under WSL.
+* Version 3.0 (2019) has been rewritten in [Go](https://golang.org/) using [Chromedp](https://github.com/chromedp) as browser-in-browser instead of http-proxy. The initial version was [less than 100 lines of code](https://gist.github.com/tenox7/b0f03c039b0a8b67f6c1bf47e2dd0df0).
+* Version 4.0 has been completely refactored to use mouse clicks via imagemap instead parsing a href nodes. 
+* Version 4.1 added sending keystrokes in to input boxes. You can now login to Gmail. Also now runs as a Docker container and on Cloud Run/Azure Containers. 
+* Version 4.5 introduces rendering whole pages in to a single tall image with client scrolling.
+
+## 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
+* Thanks to [claunia](https://github.com/claunia/) for help with the Python/Webkit version in the past
+* Historical Python/Webkit versions and prior art can be seen in [wrp-old](https://github.com/tenox7/wrp-old) repo
+
+## Legal Stuff
+
+License: Apache 2.0  
+Copyright (c) 2013-2018 Antoni Sawicki  
+Copyright (c) 2019-2020 Google LLC

go.mod

@@ -0,0 +1,12 @@
+module github.com/tenox7/wrp
+
+go 1.16
+
+require (
+	github.com/MaxHalford/halfgone v0.0.0-20171017091812-482157b86ccb
+	github.com/chromedp/cdproto v0.0.0-20210305224431-50b9f457e822
+	github.com/chromedp/chromedp v0.6.8
+	github.com/ericpauley/go-quantize v0.0.0-20200331213906-ae555eb2afa4
+	github.com/rakyll/statik v0.1.7
+	golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b // indirect
+)

go.sum

@@ -0,0 +1,25 @@
+github.com/MaxHalford/halfgone v0.0.0-20171017091812-482157b86ccb h1:YQ+d0g0P0F/06oDoeEgDHeZCIrnKgLxXcqYOpe8sTuU=
+github.com/MaxHalford/halfgone v0.0.0-20171017091812-482157b86ccb/go.mod h1:J86XzS1wgzJPjpQmpriJ+SetP17JSQUd9l+HWQK86jA=
+github.com/chromedp/cdproto v0.0.0-20210305224431-50b9f457e822 h1:iuUUtGk8vteAyrzYTdvn4gzVAw5Q7WEoDRinBQEiIe4=
+github.com/chromedp/cdproto v0.0.0-20210305224431-50b9f457e822/go.mod h1:At5TxYYdxkbQL0TSefRjhLE3Q0lgvqKKMSFUglJ7i1U=
+github.com/chromedp/chromedp v0.6.8 h1:hsMFAylK8PxqmpxzoxHkSJAV5qnixG0UJcNL70IRntg=
+github.com/chromedp/chromedp v0.6.8/go.mod h1:4NiJ4rKpkhU1Eor5stea0NvibADXd8drgtzj6+3eXZ4=
+github.com/chromedp/sysutil v1.0.0 h1:+ZxhTpfpZlmchB58ih/LBHX52ky7w2VhQVKQMucy3Ic=
+github.com/chromedp/sysutil v1.0.0/go.mod h1:kgWmDdq8fTzXYcKIBqIYvRRTnYb9aNS9moAV0xufSww=
+github.com/ericpauley/go-quantize v0.0.0-20200331213906-ae555eb2afa4 h1:BBade+JlV/f7JstZ4pitd4tHhpN+w+6I+LyOS7B4fyU=
+github.com/ericpauley/go-quantize v0.0.0-20200331213906-ae555eb2afa4/go.mod h1:H7chHJglrhPPzetLdzBleF8d22WYOv7UM/lEKYiwlKM=
+github.com/gobwas/httphead v0.1.0 h1:exrUm0f4YX0L7EBwZHuCF4GDp8aJfVeBrlLQrs6NqWU=
+github.com/gobwas/httphead v0.1.0/go.mod h1:O/RXo79gxV8G+RqlR/otEwx4Q36zl9rqC5u12GKvMCM=
+github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
+github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
+github.com/gobwas/ws v1.0.4 h1:5eXU1CZhpQdq5kXbKb+sECH5Ia5KiO6CYzIzdlVx6Bs=
+github.com/gobwas/ws v1.0.4/go.mod h1:szmBTxLgaFppYjEmNtny/v3w89xOydFnnZMcgRRu/EM=
+github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
+github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
+github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
+github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
+github.com/rakyll/statik v0.1.7 h1:OF3QCZUuyPxuGEP7B4ypUa7sB/iHtqOTDYZXGM8KOdQ=
+github.com/rakyll/statik v0.1.7/go.mod h1:AlZONWzMtEnMs7W4e/1LURLiI49pIMmp6V9Unghqrcc=
+golang.org/x/sys v0.0.0-20210305215415-5cdee2b1b5a0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b h1:ggRgirZABFolTmi3sn6Ivd9SipZwLedQ5wR0aAKnFxU=
+golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

old/wrp.py

@@ -1,931 +0,0 @@
-#!/usr/bin/env python2.7
-
-# 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.
-
-__version__ = "2.0"
-
-#
-# This program is based on the software picidae.py from picidae.net
-# 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) 2013-2018 Antoni Sawicki
-# Copyright (c) 2012-2013 picidae.net
-# Copyright (c) 2004-2013 Paul Hammond
-# 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
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
-#
-
-# Configuration options:
-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.
-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.
-
-import re
-import random
-import os
-import time
-import string
-import urllib
-import socket
-import SocketServer
-import SimpleHTTPServer
-import threading
-import Queue
-import sys
-import logging
-import StringIO
-import subprocess
-
-try:
-    import PythonMagick
-    HasMagick = True
-except ImportError:
-    HasMagick = False
-
-# Request queue (URLs go in here)
-REQ = Queue.Queue()
-# Response queue (dummy response objects)
-RESP = Queue.Queue()
-# Renders dictionary
-RENDERS = {}
-
-#######################
-### Linux CODEPATH ###
-#######################
-
-if sys.platform.startswith('linux') or sys.platform.startswith('freebsd'):
-    try:
-        from PyQt5.QtCore import *
-        from PyQt5.QtGui import *
-        from PyQt5.QtWebKit import *
-        from PyQt5.QtWebKitWidgets import *
-        from PyQt5.QtNetwork import *
-        from PyQt5.QtWidgets import *
-        IsPyQt5 = True
-    except ImportError:
-        from PyQt4.QtCore import *
-        from PyQt4.QtGui import *
-        from PyQt4.QtWebKit import *
-        from PyQt4.QtNetwork import *
-        IsPyQt5 = False
-
-    # claunia: Check how to use this in macOS
-    logging.basicConfig(filename='/dev/stdout', level=logging.WARN, )
-    logger = logging.getLogger('wrp')
-
-    # Class for Website-Rendering. Uses QWebPage, which
-    # requires a running QtGui to work.
-    class WebkitRenderer(QObject):
-        def __init__(self, **kwargs):
-            """Sets default values for the properties."""
-
-            if not QApplication.instance():
-                raise RuntimeError(self.__class__.__name__ + \
-                " requires a running QApplication instance")
-            QObject.__init__(self)
-
-            # Initialize default properties
-            self.width = kwargs.get('width', 0)
-            self.height = kwargs.get('height', 0)
-            self.timeout = kwargs.get('timeout', 0)
-            self.wait = kwargs.get('wait', 0)
-            self.logger = kwargs.get('logger', None)
-            # Set this to true if you want to capture flash.
-            # Not that your desktop must be large enough for
-            # fitting the whole window.
-            self.grabWholeWindow = kwargs.get('grabWholeWindow', False)
-
-            # Set some default options for QWebPage
-            self.qWebSettings = {
-                QWebSettings.JavascriptEnabled : True,
-                QWebSettings.PluginsEnabled : True,
-                QWebSettings.PrivateBrowsingEnabled : True,
-                QWebSettings.JavascriptCanOpenWindows : False
-            }
-
-        def render(self, url):
-            """Renders the given URL into a QImage object"""
-            # We have to use this helper object because
-            # QApplication.processEvents may be called, causing
-            # this method to get called while it has not returned yet.
-            helper = _WebkitRendererHelper(self)
-            helper._window.resize(self.width, self.height)
-            image = helper.render(url)
-
-            # Bind helper instance to this image to prevent the
-            # object from being cleaned up (and with it the QWebPage, etc)
-            # before the data has been used.
-            image.helper = helper
-
-            return image
-
-    class _WebkitRendererHelper(QObject):
-        """This helper class is doing the real work. It is required to
-        allow WebkitRenderer.render() to be called "asynchronously"
-        (but always from Qt's GUI thread).
-        """
-
-        def __init__(self, parent):
-            """Copies the properties from the parent (WebkitRenderer) object,
-            creates the required instances of QWebPage, QWebView and QMainWindow
-            and registers some Slots.
-            """
-            QObject.__init__(self)
-
-            # Copy properties from parent
-            for key, value in parent.__dict__.items():
-                setattr(self, key, value)
-
-            # Create and connect required PyQt4 objects
-            self._page = CustomWebPage(logger=self.logger)
-            self._view = QWebView()
-            self._view.setPage(self._page)
-            self._window = QMainWindow()
-            self._window.setCentralWidget(self._view)
-
-            # Import QWebSettings
-            for key, value in self.qWebSettings.iteritems():
-                self._page.settings().setAttribute(key, value)
-
-            # Connect required event listeners
-            if IsPyQt5:
-                self._page.loadFinished.connect(self._on_load_finished)
-                self._page.loadStarted.connect(self._on_load_started)
-                self._page.networkAccessManager().sslErrors.connect(self._on_ssl_errors)
-                self._page.networkAccessManager().finished.connect(self._on_each_reply)
-            else:
-                self.connect(self._page, SIGNAL("loadFinished(bool)"), self._on_load_finished)
-                self.connect(self._page, SIGNAL("loadStarted()"), self._on_load_started)
-                self.connect(self._page.networkAccessManager(),
-                            SIGNAL("sslErrors(QNetworkReply *,const QList<QSslError>&)"),
-                            self._on_ssl_errors)
-                self.connect(self._page.networkAccessManager(),
-                            SIGNAL("finished(QNetworkReply *)"),
-                            self._on_each_reply)
-
-            # The way we will use this, it seems to be unesseccary to have Scrollbars enabled
-            self._page.mainFrame().setScrollBarPolicy(Qt.Horizontal, Qt.ScrollBarAlwaysOff)
-            self._page.mainFrame().setScrollBarPolicy(Qt.Vertical, Qt.ScrollBarAlwaysOff)
-            self._page.settings().setUserStyleSheetUrl(
-                QUrl("data:text/css,html,body{overflow-y:hidden !important;}"))
-
-            # Show this widget
-            # self._window.show()
-
-        def __del__(self):
-            """Clean up Qt4 objects. """
-            self._window.close()
-            del self._window
-            del self._view
-            del self._page
-
-        def render(self, url):
-            """The real worker. Loads the page (_load_page) and awaits
-            the end of the given 'delay'. While it is waiting outstanding
-            QApplication events are processed.
-            After the given delay, the Window or Widget (depends
-            on the value of 'grabWholeWindow' is drawn into a QPixmap
-            """
-            self._load_page(url, self.width, self.height, self.timeout)
-            # Wait for end of timer. In this time, process
-            # other outstanding Qt events.
-            if self.wait > 0:
-                if self.logger: self.logger.debug("Waiting %d seconds " % self.wait)
-                waitToTime = time.time() + self.wait
-                while time.time() < waitToTime:
-                    if QApplication.hasPendingEvents():
-                        QApplication.processEvents()
-
-            if self.grabWholeWindow:
-                # Note that this does not fully ensure that the
-                # window still has the focus when the screen is
-                # grabbed. This might result in a race condition.
-                self._view.activateWindow()
-                if IsPyQt5:
-                    image = QScreen.grabWindow(self._window.winId())
-                else:
-                    image = QPixmap.grabWindow(self._window.winId())
-            else:
-                if IsPyQt5:
-                    image = QWidget.grab(self._window)
-                else:
-                    image = QPixmap.grabWidget(self._window)
-
-            httpout = WebkitRenderer.httpout
-
-            frame = self._view.page().currentFrame()
-            web_url = frame.url().toString()
-
-            # Write URL map
-            httpout.write("<!-- Web Rendering Proxy v%s by Antoni Sawicki -->\n"
-                          % (__version__))
-            httpout.write("<!-- Request for [%s] frame [%s] -->\n"
-                          % (WebkitRenderer.req_url, web_url))
-            # Get title
-            httpout.write("<HTML><HEAD>")
-            for ttl in frame.findAllElements('title'):
-                httpout.write((u"<TITLE>%s</TITLE>"
-                              % ttl.toPlainText()).encode('utf-8', errors='ignore'))
-                break # Don't repeat bad HTML coding with several title marks
-            httpout.write("</HEAD>\n<BODY>\n")
-
-            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:
-                httpout.write("<A HREF=\"http://%s\">"
-                              "<IMG SRC=\"http://%s\" ALT=\"wrp-render\" ISMAP>\n"
-                              "</A>\n" % (WebkitRenderer.req_map, WebkitRenderer.req_img))
-                mapfile = StringIO.StringIO()
-                mapfile.write("default %s\n" % (web_url))
-            else:
-                httpout.write("<IMG SRC=\"http://%s\" ALT=\"wrp-render\" USEMAP=\"#map\">\n"
-                              "<MAP NAME=\"map\">\n" % (WebkitRenderer.req_img))
-
-            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:
-                    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\""
-                                  " COORDS=\"%i,%i,%i,%i\""
-                                  " ALT=\"%s\" HREF=\"%s\">\n".decode('utf-8', errors='ignore')
-                                  % (xmin, ymin, xmax, ymax, turl, turl)).encode("utf-8"))
-
-            if ISMAP != True:
-                httpout.write("</MAP>\n")
-
-            httpout.write("</BODY>\n</HTML>\n")
-
-            if ISMAP == True:
-                RENDERS[WebkitRenderer.req_map] = mapfile
-
-            return image
-
-        def _load_page(self, url, width, height, timeout):
-            """
-            This method implements the logic for retrieving and displaying
-            the requested page.
-            """
-
-            # This is an event-based application. So we have to wait until
-            # "loadFinished(bool)" raised.
-            cancelAt = time.time() + timeout
-            self.__loading = True
-            self.__loadingResult = False # Default
-            self._page.mainFrame().load(QUrl(url))
-            while self.__loading:
-                if timeout > 0 and time.time() >= cancelAt:
-                    raise RuntimeError("Request timed out on %s" % url)
-                while QApplication.hasPendingEvents() and self.__loading:
-                    QCoreApplication.processEvents()
-
-            if self.logger: self.logger.debug("Processing result")
-
-            if self.__loading_result == False:
-                if self.logger: self.logger.warning("Failed to load %s" % url)
-
-            # Set initial viewport (the size of the "window")
-            size = self._page.mainFrame().contentsSize()
-            if self.logger: self.logger.debug("contentsSize: %s", size)
-            if width > 0:
-                size.setWidth(width)
-            if height > 0:
-                size.setHeight(height)
-
-            self._window.resize(size)
-
-        def _on_each_reply(self, reply):
-            """Logs each requested uri"""
-            self.logger.debug("Received %s" % (reply.url().toString()))
-
-        # Eventhandler for "loadStarted()" signal
-        def _on_load_started(self):
-            """Slot that sets the '__loading' property to true."""
-            if self.logger: self.logger.debug("loading started")
-            self.__loading = True
-
-        # Eventhandler for "loadFinished(bool)" signal
-        def _on_load_finished(self, result):
-            """Slot that sets the '__loading' property to false and stores
-            the result code in '__loading_result'.
-            """
-            if self.logger: self.logger.debug("loading finished with result %s", result)
-            self.__loading = False
-            self.__loading_result = result
-
-        # Eventhandler for "sslErrors(QNetworkReply *,const QList<QSslError>&)" signal
-        def _on_ssl_errors(self, reply, errors):
-            """Slot that writes SSL warnings into the log but ignores them."""
-            for e in errors:
-                if self.logger: self.logger.warn("SSL: " + e.errorString())
-            reply.ignoreSslErrors()
-
-    class CustomWebPage(QWebPage):
-        def __init__(self, **kwargs):
-            super(CustomWebPage, self).__init__()
-            self.logger = kwargs.get('logger', None)
-
-        def javaScriptAlert(self, frame, message):
-            if self.logger: self.logger.debug('Alert: %s', message)
-
-        def javaScriptConfirm(self, frame, message):
-            if self.logger: self.logger.debug('Confirm: %s', message)
-            return False
-
-        def javaScriptPrompt(self, frame, message, default, result):
-            """This function is called whenever a JavaScript program running inside frame tries to
-            prompt the user for input. The program may provide an optional message, msg, as well
-            as a default value for the input in defaultValue.
-
-            If the prompt was cancelled by the user the implementation should return false;
-            otherwise the result should be written to result and true should be returned.
-            If the prompt was not cancelled by the user, the implementation should return true and
-            the result string must not be null.
-            """
-            if self.logger: self.logger.debug('Prompt: %s (%s)' % (message, default))
-            return False
-
-        def shouldInterruptJavaScript(self):
-            """This function is called when a JavaScript program is running for a long period of
-            time. If the user wanted to stop the JavaScript the implementation should return
-            true; otherwise false.
-            """
-            if self.logger: self.logger.debug("WebKit ask to interrupt JavaScript")
-            return True
-
-    #===============================================================================
-
-    def init_qtgui(display=None, style=None, qtargs=None):
-        """Initiates the QApplication environment using the given args."""
-        if QApplication.instance():
-            logger.debug("QApplication has already been instantiated. \
-                            Ignoring given arguments and returning existing QApplication.")
-            return QApplication.instance()
-
-        qtargs2 = [sys.argv[0]]
-
-        if display:
-            qtargs2.append('-display')
-            qtargs2.append(display)
-            # Also export DISPLAY var as this may be used
-            # by flash plugin
-            os.environ["DISPLAY"] = display
-
-        if style:
-            qtargs2.append('-style')
-            qtargs2.append(style)
-
-        qtargs2.extend(qtargs or [])
-
-        return QApplication(qtargs2)
-
-    # Technically, this is a QtGui application, because QWebPage requires it
-    # to be. But because we will have no user interaction, and rendering can
-    # not start before 'app.exec_()' is called, we have to trigger our "main"
-    # by a timer event.
-    def __main_qt():
-        # Render the page.
-        # If this method times out or loading failed, a
-        # RuntimeException is thrown
-        try:
-            while True:
-                req = REQ.get()
-                WebkitRenderer.httpout = req[0]
-                WebkitRenderer.req_url = req[1]
-                WebkitRenderer.req_img = req[2]
-                WebkitRenderer.req_map = req[3]
-                if WebkitRenderer.req_url == "http://wrp.stop/" or WebkitRenderer.req_url == "http://www.wrp.stop/":
-                    print ">>> Terminate Request Received"
-                    QApplication.exit(0)
-                    break
-
-                # Initialize WebkitRenderer object
-                renderer = WebkitRenderer()
-                renderer.logger = logger
-                renderer.width = WIDTH
-                renderer.height = HEIGHT
-                renderer.timeout = 60
-                renderer.wait = WAIT
-                renderer.grabWholeWindow = False
-
-                image = renderer.render(WebkitRenderer.req_url)
-                qBuffer = QBuffer()
-
-                if HasMagick:
-                    image.save(qBuffer, 'png', QUALITY)
-                    blob = PythonMagick.Blob(qBuffer.buffer().data())
-                    mimg = PythonMagick.Image(blob)
-                    mimg.quality(QUALITY)
-
-                    if FORMAT=="GIF" and not MK_MONOCHROME and not MK_GRAYSCALE and not MK_DITHER and MK_COLORS != 0 and not MK_COLORS <= 256:
-                        mimg.quantizeColors(256)
-                        mimg.quantizeDither()
-                        mimg.quantize()
-
-                    if MK_MONOCHROME:
-                        mimg.quantizeColorSpace(PythonMagick.ColorspaceType.GRAYColorspace)
-                        mimg.quantizeColors(2)
-                        mimg.quantizeDither()
-                        mimg.quantize()
-                        mimg.monochrome()
-                    elif MK_GRAYSCALE:
-                        mimg.quantizeColorSpace(PythonMagick.ColorspaceType.GRAYColorspace)
-                        if MK_COLORS > 0 and MK_COLORS < 256:
-                            mimg.quantizeColors(MK_COLORS)
-                        else:
-                            mimg.quantizeColors(256)
-                        mimg.quantizeDither()
-                        mimg.quantize()
-                    else:
-                        if MK_COLORS > 0:
-                            mimg.quantizeColors(MK_COLORS)
-                            if MK_DITHER:
-                                mimg.quantizeDither()
-                            mimg.quantize()
-
-                    if FORMAT=="AUTO" or FORMAT=="JPG":
-                        mimg.write(blob, "jpg")
-                    elif FORMAT=="PNG":
-                        mimg.write(blob, "png")
-                    elif FORMAT=="GIF":
-                        mimg.write(blob, "gif")
-                    output = StringIO.StringIO()
-                    output.write(blob.data)
-                else:
-                    if FORMAT=="AUTO" or FORMAT=="JPG":
-                        image.save(qBuffer, 'jpg', QUALITY)
-                    elif FORMAT=="PNG":
-                        image.save(qBuffer, 'png', QUALITY)
-
-                    output = StringIO.StringIO()
-                    output.write(qBuffer.buffer().data())
-
-                RENDERS[req[2]] = output
-
-                del renderer
-                print ">>> done: %s [%d kb]..." % (WebkitRenderer.req_img, output.len/1024)
-
-                RESP.put('')
-
-            QApplication.exit(0)
-        except RuntimeError, e:
-            logger.error("main: %s" % e)
-            print >> sys.stderr, e
-            QApplication.exit(1)
-
-######################
-### macOS CODEPATH ###
-######################
-
-elif sys.platform == "darwin":
-    import Foundation
-    import WebKit
-    import AppKit
-    import objc
-
-    class AppDelegate(Foundation.NSObject):
-        # what happens when the app starts up
-        def applicationDidFinishLaunching_(self, aNotification):
-            webview = aNotification.object().windows()[0].contentView()
-            webview.frameLoadDelegate().getURL(webview)
-
-    class WebkitLoad(Foundation.NSObject, WebKit.protocols.WebFrameLoadDelegate):
-        # what happens if something goes wrong while loading
-        def webView_didFailLoadWithError_forFrame_(self, webview, error, frame):
-            if error.code() == Foundation.NSURLErrorCancelled:
-                return
-            print " ... something went wrong 1: " + error.localizedDescription()
-            AppKit.NSApplication.sharedApplication().terminate_(None)
-
-        def webView_didFailProvisionalLoadWithError_forFrame_(self, webview, error, frame):
-            if error.code() == Foundation.NSURLErrorCancelled:
-                return
-            print " ... something went wrong 2: " + error.localizedDescription()
-            AppKit.NSApplication.sharedApplication().terminate_(None)
-
-        def getURL(self, webview):
-            req = REQ.get()
-            WebkitLoad.httpout = req[0]
-            WebkitLoad.req_url = req[1]
-            WebkitLoad.req_img = req[2]
-            WebkitLoad.req_map = req[3]
-
-            if WebkitLoad.req_url == "http://wrp.stop/" or WebkitLoad.req_url == "http://www.wrp.stop/":
-                print ">>> Terminate Request Received"
-                AppKit.NSApplication.sharedApplication().terminate_(None)
-
-            nsurl = Foundation.NSURL.URLWithString_(WebkitLoad.req_url)
-            if not (nsurl and nsurl.scheme()):
-                nsurl = Foundation.NSURL.alloc().initFileURLWithPath_(WebkitLoad.req_url)
-            nsurl = nsurl.absoluteURL()
-
-            Foundation.NSURLRequest.setAllowsAnyHTTPSCertificate_forHost_(objc.YES, nsurl.host())
-
-            self.resetWebview(webview)
-            webview.mainFrame().loadRequest_(Foundation.NSURLRequest.requestWithURL_(nsurl))
-            if not webview.mainFrame().provisionalDataSource():
-                print " ... not a proper url?"
-                RESP.put('')
-                self.getURL(webview)
-
-        def resetWebview(self, webview):
-            rect = Foundation.NSMakeRect(0, 0, WIDTH, HEIGHT)
-            webview.window().setContentSize_((WIDTH, HEIGHT))
-            webview.setFrame_(rect)
-
-        def captureView(self, view):
-            view.window().display()
-            view.window().setContentSize_(view.bounds().size)
-            view.setFrame_(view.bounds())
-
-            if hasattr(view, "bitmapImageRepForCachingDisplayInRect_"):
-                bitmapdata = view.bitmapImageRepForCachingDisplayInRect_(view.bounds())
-                view.cacheDisplayInRect_toBitmapImageRep_(view.bounds(), bitmapdata)
-            else:
-                view.lockFocus()
-                bitmapdata = AppKit.NSBitmapImageRep.alloc()
-                bitmapdata.initWithFocusedViewRect_(view.bounds())
-                view.unlockFocus()
-            return bitmapdata
-
-        # what happens when the page has finished loading
-        def webView_didFinishLoadForFrame_(self, webview, frame):
-            # don't care about subframes
-            if frame == webview.mainFrame():
-                view = frame.frameView().documentView()
-
-                output = StringIO.StringIO()
-
-                if HasMagick:
-                    output.write(self.captureView(view).representationUsingType_properties_(
-                        AppKit.NSPNGFileType, None))
-                    blob = PythonMagick.Blob(output)
-                    mimg = PythonMagick.Image(blob)
-                    mimg.quality(QUALITY)
-
-                    if FORMAT=="GIF" and not MK_MONOCHROME and not MK_GRAYSCALE and not MK_DITHER and MK_COLORS != 0 and not MK_COLORS <= 256:
-                        mimg.quantizeColors(256)
-                        mimg.quantizeDither()
-                        mimg.quantize()
-
-                    if MK_MONOCHROME:
-                        mimg.quantizeColorSpace(PythonMagick.ColorspaceType.GRAYColorspace)
-                        mimg.quantizeColors(2)
-                        mimg.quantizeDither()
-                        mimg.quantize()
-                        mimg.monochrome()
-                    elif MK_GRAYSCALE:
-                        mimg.quantizeColorSpace(PythonMagick.ColorspaceType.GRAYColorspace)
-                        if MK_COLORS > 0 and MK_COLORS < 256:
-                            mimg.quantizeColors(MK_COLORS)
-                        else:
-                            mimg.quantizeColors(256)
-                        mimg.quantizeDither()
-                        mimg.quantize()
-                    else:
-                        if MK_COLORS > 0:
-                            mimg.quantizeColors(MK_COLORS)
-                            if MK_DITHER:
-                                mimg.quantizeDither()
-                            mimg.quantize()
-
-                    if FORMAT=="JPG":
-                        mimg.write(blob, "jpg")
-                    elif FORMAT=="PNG":
-                        mimg.write(blob, "png")
-                    elif FORMAT=="AUTO" or FORMAT=="GIF":
-                        mimg.write(blob, "gif")
-                    output = StringIO.StringIO()
-                    output.write(blob.data)
-                else:
-                    if FORMAT=="AUTO" or FORMAT=="GIF":
-                        output.write(self.captureView(view).representationUsingType_properties_(
-                            AppKit.NSGIFFileType, None))
-                    elif FORMAT=="JPG":
-                        output.write(self.captureView(view).representationUsingType_properties_(
-                            AppKit.NSJPEGFileType, None))
-                    elif FORMAT=="PNG":
-                        output.write(self.captureView(view).representationUsingType_properties_(
-                            AppKit.NSPNGFileType, None))
-
-                RENDERS[WebkitLoad.req_img] = output
-
-                # url of the rendered page
-                web_url = frame.dataSource().initialRequest().URL().absoluteString()
-
-                httpout = WebkitLoad.httpout
-
-                httpout.write("<!-- Web Rendering Proxy v%s by Antoni Sawicki -->\n"
-                              % (__version__))
-                httpout.write("<!-- Request for [%s] frame [%s] -->\n"
-                              % (WebkitLoad.req_url, web_url))
-
-                domdocument = frame.DOMDocument()
-                # Get title
-                httpout.write("<HTML><HEAD>")
-                httpout.write((u"<TITLE>%s</TITLE>"
-                                % domdocument.title()).encode('utf-8', errors='ignore'))
-                httpout.write("</HEAD>\n<BODY>\n")
-
-                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:
-                    httpout.write("<A HREF=\"http://%s\">"
-                                  "<IMG SRC=\"http://%s\" ALT=\"wrp-render\" ISMAP>\n"
-                                  "</A>\n" % (WebkitLoad.req_map, WebkitLoad.req_img))
-                    mapfile = StringIO.StringIO()
-                    mapfile.write("default %s\n" % (web_url))
-                else:
-                    httpout.write("<IMG SRC=\"http://%s\" ALT=\"wrp-render\" USEMAP=\"#map\">\n"
-                                  "<MAP NAME=\"map\">\n" % (WebkitLoad.req_img))
-
-                domnodelist = domdocument.getElementsByTagName_('A')
-                i = 0
-                while  i < domnodelist.length():
-                    turl = domnodelist.item_(i).valueForKey_('href')
-                    #TODO: crashes? validate url? insert web_url if wrong?
-                    myrect = domnodelist.item_(i).boundingBox()
-
-                    xmin = Foundation.NSMinX(myrect)
-                    ymin = Foundation.NSMinY(myrect)
-                    xmax = Foundation.NSMaxX(myrect)
-                    ymax = Foundation.NSMaxY(myrect)
-
-                    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\""
-                                      " COORDS=\"%i,%i,%i,%i\""
-                                      " ALT=\"%s\" HREF=\"%s\">\n".decode('utf-8', errors='ignore')
-                                      % (xmin, ymin, xmax, ymax, turl, turl))
-
-                    i += 1
-
-                if ISMAP != True:
-                    httpout.write("</MAP>\n")
-
-                httpout.write("</BODY>\n</HTML>\n")
-
-                if ISMAP == True:
-                    RENDERS[WebkitLoad.req_map] = mapfile
-
-                # Return to Proxy thread and Loop...
-                RESP.put('')
-                self.getURL(webview)
-
-    def main_cocoa():
-        # Launch NS Application
-        AppKit.NSApplicationLoad()
-        app = AppKit.NSApplication.sharedApplication()
-        delegate = AppDelegate.alloc().init()
-        AppKit.NSApp().setDelegate_(delegate)
-        AppKit.NSBundle.mainBundle().infoDictionary()['NSAppTransportSecurity'] = \
-            dict(NSAllowsArbitraryLoads=True)
-        rect = Foundation.NSMakeRect(-16000, -16000, 100, 100)
-        win = AppKit.NSWindow.alloc()
-        win.initWithContentRect_styleMask_backing_defer_(rect, AppKit.NSBorderlessWindowMask, 2, 0)
-        webview = WebKit.WebView.alloc()
-        webview.initWithFrame_(rect)
-        webview.mainFrame().frameView().setAllowsScrolling_(objc.NO)
-        webkit_version = Foundation.NSBundle.bundleForClass_(WebKit.WebView). \
-                         objectForInfoDictionaryKey_(WebKit.kCFBundleVersionKey)[1:]
-        webview.setApplicationNameForUserAgent_("Like-Version/6.0 Safari/%s wrp/%s"
-                                                % (webkit_version, __version__))
-        win.setContentView_(webview)
-        loaddelegate = WebkitLoad.alloc().init()
-        loaddelegate.options = [""]
-        webview.setFrameLoadDelegate_(loaddelegate)
-        app.run()
-
-#######################
-### COMMON CODEPATH ###
-#######################
-class Proxy(SimpleHTTPServer.SimpleHTTPRequestHandler):
-    def do_GET(self):
-        req_url = self.path
-        httpout = self.wfile
-
-        map_re = re.match(r"http://(wrp-\d+\.map).*?(\d+),(\d+)", req_url)
-        wid_re = re.match(r"http://(width-[0-9]+-px\.jpg).*", req_url)
-        gif_re = re.match(r"http://(wrp-\d+\.gif).*", req_url)
-        jpg_re = re.match(r"http://(wrp-\d+\.jpg).*", req_url)
-        png_re = re.match(r"http://(wrp-\d+\.png).*", req_url)
-
-        # Serve Rendered GIF
-        if gif_re:
-            img = gif_re.group(1)
-            print ">>> request for rendered gif image... %s  [%d kb]" \
-                   % (img, RENDERS[img].len/1024)
-            self.send_response(200, 'OK')
-            self.send_header('Content-type', 'image/gif')
-            self.end_headers()
-            httpout.write(RENDERS[img].getvalue())
-            del RENDERS[img]
-
-        elif jpg_re:
-            img = jpg_re.group(1)
-            print ">>> request for rendered jpg image... %s  [%d kb]" \
-                   % (img, RENDERS[img].len/1024)
-            self.send_response(200, 'OK')
-            self.send_header('Content-type', 'image/jpeg')
-            self.end_headers()
-            httpout.write(RENDERS[img].getvalue())
-            del RENDERS[img]
-
-        elif png_re:
-            img = png_re.group(1)
-            print ">>> request for rendered png image... %s  [%d kb]" \
-                   % (img, RENDERS[img].len/1024)
-            self.send_response(200, 'OK')
-            self.send_header('Content-type', 'image/png')
-            self.end_headers()
-            httpout.write(RENDERS[img].getvalue())
-            del RENDERS[img]
-
-        elif wid_re:
-            global WIDTH
-            try:
-                wid = req_url.split("-")
-                WIDTH = int(wid[1])
-                print ">>> width request: %d" % WIDTH
-            except:
-                print ">>> width request error" % WIDTH
-
-            self.send_error(404, "Width request")
-            self.end_headers()
-
-        # Process ISMAP Request
-        elif map_re:
-            map = map_re.group(1)
-            req_x = int(map_re.group(2))
-            req_y = int(map_re.group(3))
-            print ">>> ISMAP request... %s [%d,%d] " % (map, req_x, req_y)
-
-            mapf = RENDERS[map]
-            mapf.seek(0)
-            goto_url = "none"
-            for line in mapf.readlines():
-                if re.match(r"(\S+)", line).group(1) == "default":
-                    default_url = re.match(r"\S+\s+(\S+)", line).group(1)
-
-                elif re.match(r"(\S+)", line).group(1) == "rect":
-                    try:
-                        rect = re.match(r"(\S+)\s+(\S+)\s+(\d+),(\d+)\s+(\d+),(\d+)", line)
-                        min_x = int(rect.group(3))
-                        min_y = int(rect.group(4))
-                        max_x = int(rect.group(5))
-                        max_y = int(rect.group(6))
-                        if (req_x >= min_x) and \
-                            (req_x <= max_x) and \
-                            (req_y >= min_y) and \
-                            (req_y <= max_y):
-                            goto_url = rect.group(2)
-                    except AttributeError:
-                        pass
-
-            if goto_url == "none":
-                goto_url = default_url
-
-            print ">>> ISMAP redirect: %s\n" % (goto_url)
-
-            self.send_response(302, "Found")
-            self.send_header("Location", goto_url)
-            self.send_header("Content-type", "text/html")
-            self.end_headers()
-            httpout.write("<HTML><BODY><A HREF=\"%s\">%s</A></BODY></HTML>\n"
-                          % (goto_url, goto_url))
-
-        # Process a web page request and generate image
-        else:
-            print ">>> URL request... " + req_url
-
-            if req_url == "http://wrp.stop/" or req_url == "http://www.wrp.stop/":
-                REQ.put((httpout, req_url, "", ""))
-                RESP.get()
-            else:
-                reqst = urllib.urlopen(req_url)
-
-                if reqst.info().type == "text/html" or reqst.info().type == "application/xhtml+xml":
-                # If an error occurs, send error headers to the requester
-                    if reqst.getcode() >= 400:
-                        self.send_response(reqst.getcode())
-                        for hdr in reqst.info():
-                            self.send_header(hdr, reqst.info()[hdr])
-                        self.end_headers()
-                    else:
-                        self.send_response(200, 'OK')
-                        self.send_header('Content-type', 'text/html')
-                        self.end_headers()
-
-                    rnd = random.randrange(0, 1000)
-
-                    if FORMAT == "GIF":
-                        req_extension = ".gif"
-                    elif FORMAT == "JPG":
-                        req_extension = ".jpg"
-                    elif FORMAT == "PNG":
-                        req_extension = ".png"
-                    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"
-
-                    req_img = "wrp-%s%s" % (rnd, req_extension)
-                    req_map = "wrp-%s.map" % (rnd)
-
-                    # To WebKit Thread
-                    REQ.put((httpout, req_url, req_img, req_map))
-                    # Wait for completition
-                    RESP.get()
-                # If the requested file is not HTML or XHTML, just return it as is.
-                else:
-                    self.send_response(reqst.getcode())
-                    for hdr in reqst.info():
-                        self.send_header(hdr, reqst.info()[hdr])
-                    self.end_headers()
-                    httpout.write(reqst.read())
-
-def run_proxy():
-    httpd = SocketServer.TCPServer(('', PORT), Proxy)
-    print "Web Rendering Proxy v%s serving at port: %s" % (__version__, PORT)
-    while 1:
-        httpd.serve_forever()
-
-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.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.startswith('linux') or sys.platform.startswith('freebsd'):
-        import signal
-        try:
-            import PyQt5.QtCore
-        except ImportError:
-            import PyQt4.QtCore
-        # Initialize Qt-Application, but make this script
-        # abortable via CTRL-C
-        app = init_qtgui(display=None, style=None)
-        signal.signal(signal.SIGINT, signal.SIG_DFL)
-
-        QTimer.singleShot(0, __main_qt)
-        sys.exit(app.exec_())
-    elif sys.platform == "darwin":
-        main_cocoa()
-    else:
-        sys.exit("Unsupported platform: %s. Exiting." % sys.platform)
-
-if __name__ == '__main__': main()

wrp.go

@@ -2,9 +2,11 @@
 // WRP - Web Rendering Proxy
 //
 // Copyright (c) 2013-2018 Antoni Sawicki
-// Copyright (c) 2019 Google LLC
+// Copyright (c) 2019-2021 Google LLC
 //
 
+//go:generate statik -f -src=. -include=wrp.html
+
 package main
 
 import (
@@ -12,276 +14,491 @@ import (
 	"context"
 	"flag"
 	"fmt"
-	_ "image"
+	"html/template"
+	"image"
 	"image/gif"
 	"image/png"
+	"io/ioutil"
 	"log"
+	"math"
 	"math/rand"
 	"net/http"
 	"net/url"
+	"os"
+	"os/signal"
 	"strconv"
 	"strings"
+	"syscall"
 	"time"
 
+	"github.com/MaxHalford/halfgone"
+	"github.com/chromedp/cdproto/css"
 	"github.com/chromedp/cdproto/emulation"
-	"github.com/chromedp/cdproto/runtime"
-
-	"github.com/chromedp/cdproto/cdp"
-	"github.com/chromedp/cdproto/dom"
+	"github.com/chromedp/cdproto/page"
 	"github.com/chromedp/chromedp"
+	"github.com/ericpauley/go-quantize/quantize"
+	"github.com/rakyll/statik/fs"
+	_ "github.com/tenox7/wrp/statik"
 )
 
-// Ismap for server side processing
-type Ismap struct {
-	xmin int64
-	ymin int64
-	xmax int64
-	ymax int64
-	url  string
-}
-
 var (
-	version = "3.0"
-	ctx     context.Context
-	cancel  context.CancelFunc
-	gifmap  = make(map[string]bytes.Buffer)
-	ismap   = make(map[string][]Ismap)
+	version  = "4.5.2"
+	srv      http.Server
+	ctx      context.Context
+	cancel   context.CancelFunc
+	img      = make(map[string]bytes.Buffer)
+	ismap    = make(map[string]wrpReq)
+	noDel    bool
+	defType  string
+	defGeom  geom
+	htmlTmpl *template.Template
 )
 
-func pageServer(out http.ResponseWriter, req *http.Request) {
-	req.ParseForm()
-	u := req.FormValue("url")
-	var istr string
-	var ion string
-	var i bool
-	if req.FormValue("i") == "on" {
-		istr = "CHECKED"
-		i = true
-		ion = "&i=on"
-	} else {
-		istr = ""
-		i = false
-	}
-	p, _ := strconv.ParseInt(req.FormValue("p"), 10, 64)
-	if req.FormValue("pg") == "Dn" {
-		p++
-	} else if req.FormValue("pg") == "Up" {
-		p--
-	} else {
-		p = 0
-	}
-	w, _ := strconv.ParseInt(req.FormValue("w"), 10, 64)
-	if w < 10 {
-		w = 1024
-	}
-	h, _ := strconv.ParseInt(req.FormValue("h"), 10, 64)
-	if h < 10 {
-		h = 768
-	}
-	s, _ := strconv.ParseFloat(req.FormValue("s"), 64)
-	if s < 0.1 {
-		s = 1.0
-	}
-	c, _ := strconv.ParseInt(req.FormValue("c"), 10, 64)
-	if c < 2 || c > 256 {
-		c = 256
-	}
-	log.Printf("%s Page Reqest for url=\"%s\" [%s]\n", req.RemoteAddr, u, req.URL.Path)
-	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", u)
-	fmt.Fprintf(out, "<FORM ACTION=\"/\"><INPUT TYPE=\"TEXT\" NAME=\"url\" VALUE=\"%s\" SIZE=\"20\">", u)
-	fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" VALUE=\"Go\"> \n")
-	fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Up\"> \n")
-	fmt.Fprintf(out, "<INPUT TYPE=\"TEXT\" NAME=\"p\" VALUE=\"%d\" SIZE=\"2\"> \n", p)
-	fmt.Fprintf(out, "<INPUT TYPE=\"SUBMIT\" NAME=\"pg\" VALUE=\"Dn\"> \n")
-	fmt.Fprintf(out, "I <INPUT TYPE=\"CHECKBOX\" NAME=\"i\" %s> \n", istr)
-	fmt.Fprintf(out, "W <INPUT TYPE=\"TEXT\" NAME=\"w\" VALUE=\"%d\" SIZE=\"4\"> \n", w)
-	fmt.Fprintf(out, "H <INPUT TYPE=\"TEXT\" NAME=\"h\" VALUE=\"%d\" SIZE=\"4\"> \n", h)
-	fmt.Fprintf(out, "S <INPUT TYPE=\"TEXT\" NAME=\"s\" VALUE=\"%1.2f\" SIZE=\"3\"> \n", s)
-	fmt.Fprintf(out, "C <INPUT TYPE=\"TEXT\" NAME=\"c\" VALUE=\"%d\" SIZE=\"3\"> \n", c)
-	fmt.Fprintf(out, "</FORM><BR>\n")
-	if len(u) > 1 {
-		if strings.HasPrefix(u, "http") {
-			capture(u, w, h, s, int(c), p, i, req.RemoteAddr, out)
-		} else {
-			capture(fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(u)), w, h, s, int(c), p, i, req.RemoteAddr, out)
-		}
-	} else {
-		fmt.Fprintf(out, "No URL or search query specified")
-	}
-	fmt.Fprintf(out, "\n<P><A HREF=\"/?url=https://github.com/tenox7/wrp/&w=%d&h=%d&s=%1.2f&c=%d%s\">Web Rendering Proxy Version %s</A></BODY>\n</HTML>\n", w, h, s, c, ion, version)
+type geom struct {
+	w int64
+	h int64
+	c int64
 }
 
-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)
+// Data for html template
+type uiData struct {
+	Version    string
+	URL        string
+	BgColor    string
+	NColors    int64
+	Width      int64
+	Height     int64
+	Zoom       float64
+	ImgType    string
+	ImgURL     string
+	ImgSize    string
+	ImgWidth   int
+	ImgHeight  int
+	MapURL     string
+	PageHeight string
+}
+
+// Parameters for HTML print function
+type printParams struct {
+	bgColor    string
+	pageHeight string
+	imgSize    string
+	imgURL     string
+	mapURL     string
+	imgWidth   int
+	imgHeight  int
+}
+
+// WRP Request
+type wrpReq struct {
+	url     string  // url
+	width   int64   // width
+	height  int64   // height
+	zoom    float64 // zoom/scale
+	colors  int64   // #colors
+	mouseX  int64   // mouseX
+	mouseY  int64   // mouseY
+	keys    string  // keys to send
+	buttons string  // Fn buttons
+	imgType string  // imgtype
+	out     http.ResponseWriter
+	req     *http.Request
+}
+
+// Parse HTML Form, Process Input Boxes, Etc.
+func parseForm(w *wrpReq) {
+	w.req.ParseForm()
+	w.url = w.req.FormValue("url")
+	if len(w.url) > 1 && !strings.HasPrefix(w.url, "http") {
+		w.url = fmt.Sprintf("http://www.google.com/search?q=%s", url.QueryEscape(w.url))
+	}
+	w.width, _ = strconv.ParseInt(w.req.FormValue("w"), 10, 64)
+	w.height, _ = strconv.ParseInt(w.req.FormValue("h"), 10, 64)
+	if w.width < 10 && w.height < 10 {
+		w.width = defGeom.w
+		w.height = defGeom.h
+	}
+	w.zoom, _ = strconv.ParseFloat(w.req.FormValue("z"), 64)
+	if w.zoom < 0.1 {
+		w.zoom = 1.0
+	}
+	w.colors, _ = strconv.ParseInt(w.req.FormValue("c"), 10, 64)
+	if w.colors < 2 || w.colors > 256 {
+		w.colors = defGeom.c
+	}
+	w.keys = w.req.FormValue("k")
+	w.buttons = w.req.FormValue("Fn")
+	w.imgType = w.req.FormValue("t")
+	if w.imgType != "gif" && w.imgType != "png" {
+		w.imgType = defType
+	}
+	log.Printf("%s WrpReq from UI Form: %+v\n", w.req.RemoteAddr, w)
+}
+
+// Display WP UI
+func printHTML(w wrpReq, p printParams) {
+	w.out.Header().Set("Cache-Control", "max-age=0")
+	w.out.Header().Set("Expires", "-1")
+	w.out.Header().Set("Pragma", "no-cache")
+	w.out.Header().Set("Content-Type", "text/html")
+	data := uiData{
+		Version:    version,
+		URL:        w.url,
+		BgColor:    p.bgColor,
+		Width:      w.width,
+		Height:     w.height,
+		NColors:    w.colors,
+		Zoom:       w.zoom,
+		ImgType:    w.imgType,
+		ImgSize:    p.imgSize,
+		ImgWidth:   p.imgWidth,
+		ImgHeight:  p.imgHeight,
+		ImgURL:     p.imgURL,
+		MapURL:     p.mapURL,
+		PageHeight: p.pageHeight,
+	}
+	err := htmlTmpl.Execute(w.out, data)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+// Determine what action to take
+func action(w wrpReq) chromedp.Action {
+	// Mouse Click
+	if w.mouseX > 0 && w.mouseY > 0 {
+		log.Printf("%s Mouse Click %d,%d\n", w.req.RemoteAddr, w.mouseX, w.mouseY)
+		return chromedp.MouseClickXY(float64(w.mouseX)/float64(w.zoom), float64(w.mouseY)/float64(w.zoom))
+	}
+	// Buttons
+	if len(w.buttons) > 0 {
+		log.Printf("%s Button %v\n", w.req.RemoteAddr, w.buttons)
+		switch w.buttons {
+		case "Bk":
+			return chromedp.NavigateBack()
+		case "St":
+			return chromedp.Stop()
+		case "Re":
+			return chromedp.Reload()
+		case "Bs":
+			return chromedp.KeyEvent("\b")
+		case "Rt":
+			return chromedp.KeyEvent("\r")
+		case "<":
+			return chromedp.KeyEvent("\u0302")
+		case "^":
+			return chromedp.KeyEvent("\u0304")
+		case "v":
+			return chromedp.KeyEvent("\u0301")
+		case ">":
+			return chromedp.KeyEvent("\u0303")
+		}
+	}
+	// Keys
+	if len(w.keys) > 0 {
+		log.Printf("%s Sending Keys: %#v\n", w.req.RemoteAddr, w.keys)
+		return chromedp.KeyEvent(w.keys)
+	}
+	// Navigate to URL
+	log.Printf("%s Processing Capture Request for %s\n", w.req.RemoteAddr, w.url)
+	return chromedp.Navigate(w.url)
+}
+
+// Process Keyboard and Mouse events or Navigate to the desired URL.
+func navigate(w wrpReq) {
+	err := chromedp.Run(ctx, action(w))
+	if err != nil {
+		if err.Error() == "context canceled" {
+			log.Printf("%s Contex cancelled, try again", w.req.RemoteAddr)
+			fmt.Fprintf(w.out, "<BR>%s<BR> -- restarting, try again", err)
+			ctx, cancel = chromedp.NewContext(context.Background())
+			return
+		}
+		log.Printf("%s %s", w.req.RemoteAddr, err)
+		fmt.Fprintf(w.out, "<BR>%s<BR>", err)
+	}
+}
+
+// Capture currently rendered web page to an image and fake ISMAP
+func capture(w wrpReq) {
+	var err error
+	var styles []*css.ComputedStyleProperty
+	var r, g, b int
+	var h int64
+	var pngcap []byte
+	chromedp.Run(ctx,
+		emulation.SetDeviceMetricsOverride(int64(float64(w.width)/w.zoom), 10, w.zoom, false),
+		chromedp.Location(&w.url),
+		chromedp.ComputedStyle("body", &styles, chromedp.ByQuery),
+		chromedp.ActionFunc(func(ctx context.Context) error {
+			_, _, s, err := page.GetLayoutMetrics().Do(ctx)
+			if err == nil {
+				h = int64(math.Ceil(s.Height))
+			}
+			return nil
+		}),
+	)
+	for _, style := range styles {
+		if style.Name == "background-color" {
+			fmt.Sscanf(style.Value, "rgb(%d,%d,%d)", &r, &g, &b)
+		}
+	}
+	log.Printf("%s Landed on: %s, Height: %v\n", w.req.RemoteAddr, w.url, h)
+	height := int64(float64(w.height) / w.zoom)
+	if w.height == 0 && h > 0 {
+		height = h + 30
+	}
+	chromedp.Run(ctx, emulation.SetDeviceMetricsOverride(int64(float64(w.width)/w.zoom), height, w.zoom, false))
+	// Capture screenshot...
+	err = chromedp.Run(ctx,
+		chromedp.Sleep(time.Second*2),
+		chromedp.CaptureScreenshot(&pngcap),
+	)
+	if err != nil {
+		if err.Error() == "context canceled" {
+			log.Printf("%s Contex cancelled, try again", w.req.RemoteAddr)
+			fmt.Fprintf(w.out, "<BR>%s<BR> -- restarting, try again", err)
+			ctx, cancel = chromedp.NewContext(context.Background())
+			return
+		}
+		log.Printf("%s Failed to capture screenshot: %s\n", w.req.RemoteAddr, err)
+		fmt.Fprintf(w.out, "<BR>Unable to capture screenshot:<BR>%s<BR>\n", err)
 		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()
+	seq := rand.Intn(9999)
+	imgpath := fmt.Sprintf("/img/%04d.%s", seq, w.imgType)
+	mappath := fmt.Sprintf("/map/%04d.map", seq)
+	ismap[mappath] = w
+	var ssize string
+	var iw, ih int
+	switch w.imgType {
+	case "gif":
+		i, err := png.Decode(bytes.NewReader(pngcap))
+		if err != nil {
+			log.Printf("%s Failed to decode screenshot: %s\n", w.req.RemoteAddr, err)
+			fmt.Fprintf(w.out, "<BR>Unable to decode page screenshot:<BR>%s<BR>\n", err)
+			return
+		}
+		if w.colors == 2 {
+			gray := halfgone.ImageToGray(i)
+			i = halfgone.FloydSteinbergDitherer{}.Apply(gray)
+		}
+		var gifbuf bytes.Buffer
+		err = gif.Encode(&gifbuf, i, &gif.Options{NumColors: int(w.colors), Quantizer: quantize.MedianCutQuantizer{}})
+		if err != nil {
+			log.Printf("%s Failed to encode GIF: %s\n", w.req.RemoteAddr, err)
+			fmt.Fprintf(w.out, "<BR>Unable to encode GIF:<BR>%s<BR>\n", err)
+			return
+		}
+		img[imgpath] = gifbuf
+		ssize = fmt.Sprintf("%.0f KB", float32(len(gifbuf.Bytes()))/1024.0)
+		iw = i.Bounds().Max.X
+		ih = i.Bounds().Max.Y
+		log.Printf("%s Encoded GIF image: %s, Size: %s, Colors: %d, %dx%d\n", w.req.RemoteAddr, imgpath, ssize, w.colors, iw, ih)
+	case "png":
+		pngbuf := bytes.NewBuffer(pngcap)
+		img[imgpath] = *pngbuf
+		cfg, _, _ := image.DecodeConfig(pngbuf)
+		ssize = fmt.Sprintf("%.0f KB", float32(len(pngbuf.Bytes()))/1024.0)
+		iw = cfg.Width
+		ih = cfg.Height
+		log.Printf("%s Got PNG image: %s, Size: %s, %dx%d\n", w.req.RemoteAddr, imgpath, ssize, iw, ih)
+	}
+	printHTML(w, printParams{
+		bgColor:    fmt.Sprintf("#%02X%02X%02X", r, g, b),
+		pageHeight: fmt.Sprintf("%d PX", h),
+		imgSize:    ssize,
+		imgURL:     imgpath,
+		mapURL:     mappath,
+		imgWidth:   iw,
+		imgHeight:  ih,
+	})
+	log.Printf("%s Done with capture for %s\n", w.req.RemoteAddr, w.url)
 }
 
+// Process HTTP requests to WRP '/' url
+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.req = req
+	w.out = out
+	parseForm(&w)
+	if len(w.url) < 4 {
+		printHTML(w, printParams{bgColor: "#FFFFFF"})
+		return
+	}
+	navigate(w)
+	capture(w)
+}
+
+// Process HTTP requests to ISMAP '/map/' url
 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)
-	var loc string
-	var x, y int64
-	n, err := fmt.Sscanf(req.URL.RawQuery, "%d,%d", &x, &y)
+	w, ok := ismap[req.URL.Path]
+	w.req = req
+	w.out = out
+	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
+	}
+	if !noDel {
+		defer delete(ismap, req.URL.Path)
+	}
+	n, err := fmt.Sscanf(req.URL.RawQuery, "%d,%d", &w.mouseX, &w.mouseY)
 	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
 	}
-	is, ok := ismap[req.URL.Path]
-	if !ok || is == nil {
-		fmt.Fprintf(out, "Unable to find map %s\n", req.URL.Path)
-		log.Printf("Unable to find map %s\n", req.URL.Path)
+	log.Printf("%s WrpReq from ISMAP: %+v\n", req.RemoteAddr, w)
+	if len(w.url) < 4 {
+		printHTML(w, printParams{bgColor: "#FFFFFF"})
 		return
 	}
-	defer delete(ismap, req.URL.Path)
-	for _, i := range is {
-		if x >= i.xmin && x <= i.xmax && y >= i.ymin && y <= i.ymax {
-			loc = i.url
-		}
-	}
-	if len(loc) < 1 {
-		loc = is[0].url
-	}
-	log.Printf("%s ISMAP Redirect to: http://%s%s\n", req.RemoteAddr, req.Context().Value(http.LocalAddrContextKey), loc)
-	http.Redirect(out, req, fmt.Sprintf("http://%s%s", req.Context().Value(http.LocalAddrContextKey), loc), 301)
+	navigate(w)
+	capture(w)
 }
 
-func capture(gourl string, w int64, h int64, s float64, co int, p int64, i bool, c string, 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
-	is := make([]Ismap, 0)
-	var ion string
-
-	log.Printf("%s Processing Caputure Request for %s\n", c, gourl)
-
-	// Run ChromeDP Magic
-	err := chromedp.Run(ctx,
-		emulation.SetDeviceMetricsOverride(int64(float64(w)/s), int64(float64(h)/s), 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 %s", c, err)
-		fmt.Fprintf(out, "<BR>%s<BR>", err)
+// Process HTTP requests for images '/img/' url
+func imgServer(out http.ResponseWriter, req *http.Request) {
+	log.Printf("%s IMG Request for %s\n", req.RemoteAddr, req.URL.Path)
+	imgbuf, ok := img[req.URL.Path]
+	if !ok || imgbuf.Bytes() == nil {
+		fmt.Fprintf(out, "Unable to find image %s\n", req.URL.Path)
+		log.Printf("%s Unable to find image %s\n", req.RemoteAddr, req.URL.Path)
 		return
 	}
-
-	log.Printf("%s Landed on: %s, Nodes: %d\n", c, loc, len(nodes))
-
-	// Process Screenshot Image
-	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
+	if !noDel {
+		defer delete(img, req.URL.Path)
 	}
-	gifbuf.Reset()
-	err = gif.Encode(&gifbuf, img, &gif.Options{NumColors: co})
-	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
-	}
-	seq := rand.Intn(9999)
-	imgpath := fmt.Sprintf("/img/%04d.gif", seq)
-	mappath := fmt.Sprintf("/map/%04d.map", seq)
-	log.Printf("%s Encoded GIF image: %s, Size: %dKB\n", c, imgpath, len(gifbuf.Bytes())/1024)
-	gifmap[imgpath] = gifbuf
-
-	// Process Nodes
-	base, _ := url.Parse(loc)
-	if i {
-		fmt.Fprintf(out, "<A HREF=\"%s\"><IMG SRC=\"%s\" ALT=\"wrp\" BORDER=\"0\" ISMAP></A>", mappath, imgpath)
-		is = append(is, Ismap{xmin: -1, xmax: -1, ymin: -1, ymax: -1, url: fmt.Sprintf("/?url=%s&w=%d&h=%d&s=%1.2f&c=%d&i=on", loc, w, h, s, co)})
-		ion = "&i=on"
-	} else {
-		fmt.Fprintf(out, "<IMG SRC=\"%s\" ALT=\"wrp\" BORDER=\"0\" 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&c=%d%s", tgt, w, h, s, co, ion) // no page# here
-
-		if len(b.Content) > 6 && len(target) > 7 {
-			if i {
-				is = append(is, Ismap{
-					xmin: int64(b.Content[0] * s), ymin: int64(b.Content[1] * s),
-					xmax: int64(b.Content[4] * s), ymax: int64(b.Content[5] * s),
-					url: target})
-			} 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 i {
-		log.Printf("%s Encoded ISMAP %s\n", c, mappath)
-	} else {
-		fmt.Fprintf(out, "</MAP>\n")
+	switch {
+	case strings.HasPrefix(req.URL.Path, ".gif"):
+		out.Header().Set("Content-Type", "image/gif")
+	case strings.HasPrefix(req.URL.Path, ".png"):
+		out.Header().Set("Content-Type", "image/png")
 	}
+	out.Header().Set("Content-Length", strconv.Itoa(len(imgbuf.Bytes())))
+	out.Header().Set("Cache-Control", "max-age=0")
+	out.Header().Set("Expires", "-1")
+	out.Header().Set("Pragma", "no-cache")
+	out.Write(imgbuf.Bytes())
 	out.(http.Flusher).Flush()
-	log.Printf("%s Done with caputure for %s\n", c, gourl)
-	ismap[mappath] = is
 }
 
-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
+// Process HTTP requests for Shutdown via '/shutdown/' url
+func haltServer(out http.ResponseWriter, req *http.Request) {
+	log.Printf("%s Shutdown Request for %s\n", req.RemoteAddr, req.URL.Path)
+	out.Header().Set("Cache-Control", "max-age=0")
+	out.Header().Set("Expires", "-1")
+	out.Header().Set("Pragma", "no-cache")
+	out.Header().Set("Content-Type", "text/plain")
+	fmt.Fprintf(out, "Shutting down WRP...\n")
+	out.(http.Flusher).Flush()
+	time.Sleep(time.Second * 2)
+	cancel()
+	srv.Shutdown(context.Background())
+	os.Exit(1)
+}
+
+// returns html template, either from html file or built-in
+func tmpl(t string) string {
+	var tmpl []byte
+	fh, err := os.Open(t)
+	if err != nil {
+		goto statik
 	}
+	tmpl, err = ioutil.ReadAll(fh)
+	if err != nil {
+		goto statik
+	}
+	log.Printf("Got UI template from %v file\n", t)
+	return string(tmpl)
+
+statik:
+	sfs, err := fs.New()
+	if err != nil {
+		log.Fatal(err)
+	}
+	fhs, err := sfs.Open("/wrp.html")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	tmpl, err = ioutil.ReadAll(fhs)
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Printf("Got UI template from built-in\n")
+	return string(tmpl)
+}
+
+// Main...
+func main() {
+	var addr, fgeom, tHTML string
+	var headless bool
+	var debug bool
+	var err error
+	flag.StringVar(&addr, "l", ":8080", "Listen address:port, default :8080")
+	flag.BoolVar(&headless, "h", true, "Headless mode - hide browser window")
+	flag.BoolVar(&debug, "d", false, "Debug ChromeDP")
+	flag.BoolVar(&noDel, "n", false, "Do not free maps and images after use")
+	flag.StringVar(&defType, "t", "gif", "Image type: gif|png")
+	flag.StringVar(&fgeom, "g", "1152x600x256", "Geometry: width x height x colors, height can be 0 for unlimited")
+	flag.StringVar(&tHTML, "ui", "wrp.html", "HTML template file for the UI")
+	flag.Parse()
+	if len(os.Getenv("PORT")) > 0 {
+		addr = ":" + os.Getenv(("PORT"))
+	}
+	n, err := fmt.Sscanf(fgeom, "%dx%dx%d", &defGeom.w, &defGeom.h, &defGeom.c)
+	if err != nil || n != 3 {
+		log.Fatalf("Unable to parse -g geometry flag / %s", err)
+	}
+
 	opts := append(chromedp.DefaultExecAllocatorOptions[:],
 		chromedp.Flag("headless", headless),
+		chromedp.Flag("hide-scrollbars", false),
 	)
-	actx, cancel := chromedp.NewExecAllocator(context.Background(), opts...)
-	defer cancel()
+	actx, acancel := chromedp.NewExecAllocator(context.Background(), opts...)
+	defer acancel()
 	if debug {
 		ctx, cancel = chromedp.NewContext(actx, chromedp.WithDebugf(log.Printf))
 	} else {
 		ctx, cancel = chromedp.NewContext(actx)
 	}
 	defer cancel()
+
 	rand.Seed(time.Now().UnixNano())
+
+	c := make(chan os.Signal)
+	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		<-c
+		log.Printf("Interrupt - shutting down.")
+		cancel()
+		srv.Shutdown(context.Background())
+		os.Exit(1)
+	}()
+
 	http.HandleFunc("/", pageServer)
-	http.HandleFunc("/img/", imgServer)
 	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("Args: %q", os.Args)
+	log.Printf("Default Img Type: %v, Geometry: %+v", defType, defGeom)
+
+	htmlTmpl, err = template.New("wrp.html").Parse(tmpl(tHTML))
+	if err != nil {
+		log.Fatal(err)
+	}
+
 	log.Printf("Starting WRP http server on %s\n", addr)
-	http.ListenAndServe(addr, nil)
+	srv.Addr = addr
+	err = srv.ListenAndServe()
+	if err != nil {
+		log.Fatal(err)
+	}
 }

wrp.html

@@ -0,0 +1,56 @@
+<HTML>
+    <HEAD>
+        <TITLE>WRP {{.URL}}</TITLE>
+    </HEAD>
+    <BODY BGCOLOR="{{.BgColor}}">
+        <FORM ACTION="/" METHOD="POST">
+            <INPUT TYPE="TEXT" NAME="url" VALUE="{{.URL}}" SIZE="20">
+            <INPUT TYPE="SUBMIT" VALUE="Go">
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="Bk">
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="St">
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="Re">
+            W <INPUT TYPE="TEXT" NAME="w" VALUE="{{.Width}}" SIZE="4">
+            H <INPUT TYPE="TEXT" NAME="h" VALUE="{{.Height}}" SIZE="4">
+            Z <SELECT NAME="z">
+                <OPTION VALUE="0.7" {{ if eq .Zoom 0.7}}SELECTED{{end}}>0.7 x</OPTION>
+                <OPTION VALUE="0.8" {{ if eq .Zoom 0.8}}SELECTED{{end}}>0.8 x</OPTION>
+                <OPTION VALUE="0.9" {{ if eq .Zoom 0.9}}SELECTED{{end}}>0.9 x</OPTION>
+                <OPTION VALUE="1.0" {{ if eq .Zoom 1.0}}SELECTED{{end}}>1.0 x</OPTION>
+                <OPTION VALUE="1.1" {{ if eq .Zoom 1.1}}SELECTED{{end}}>1.1 x</OPTION>
+                <OPTION VALUE="1.2" {{ if eq .Zoom 1.2}}SELECTED{{end}}>1.2 x</OPTION>
+                <OPTION VALUE="1.3" {{ if eq .Zoom 1.3}}SELECTED{{end}}>1.3 x</OPTION>
+            </SELECT>
+            T <SELECT NAME="t">
+                <OPTION VALUE="gif" {{ if eq .ImgType "gif"}}SELECTED{{end}}>GIF</OPTION>
+                <OPTION VALUE="png" {{ if eq .ImgType "png"}}SELECTED{{end}}>PNG</OPTION>
+            </SELECT>
+            C <SELECT NAME="c">
+                <OPTION VALUE="2" {{ if eq .NColors 2}}SELECTED{{end}}>2</OPTION>
+                <OPTION VALUE="16" {{ if eq .NColors 16}}SELECTED{{end}}>16</OPTION>
+                <OPTION VALUE="64" {{ if eq .NColors 64}}SELECTED{{end}}>64</OPTION>
+                <OPTION VALUE="128" {{ if eq .NColors 128}}SELECTED{{end}}>128</OPTION>
+                <OPTION VALUE="256" {{ if eq .NColors 256}}SELECTED{{end}}>256</OPTION>
+            </SELECT>
+            K <INPUT TYPE="TEXT" NAME="k" VALUE="" SIZE="4">
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="Bs">
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="Rt"><!--
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="&lt;">
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="^">
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="v">
+            <INPUT TYPE="SUBMIT" NAME="Fn" VALUE="&gt;" SIZE="1">-->
+        </FORM>
+        <BR>
+        {{if .ImgURL}}
+        <A HREF="{{.MapURL}}">
+            <IMG SRC="{{.ImgURL}}" BORDER="0" ALT="Url: {{.URL}}, Size: {{.ImgSize}} PageHeight: {{.PageHeight}}" WIDTH="{{.ImgWidth}}" HEIGHT="{{.ImgHeight}}" ISMAP>
+        </A>
+        <P>
+        {{end}}
+		<FONT SIZE="-2">
+		<A HREF="/?url=https://github.com/tenox7/wrp/&w={{.Width}}&h={{.Height}}&s={{printf "%.1f" .Zoom}}&c={{.NColors}}&t={{.ImgType}}">Web Rendering Proxy {{.Version}}</A> |
+		<A HREF="/shutdown/">Shutdown WRP</A> |
+		<A HREF="/">Page Height: {{.PageHeight}}</A> |
+		<A HREF="/">Img Size: {{.ImgSize}}</A>
+		</FONT>
+    </BODY>
+</HTML>