eMonitor

[realitystorm]

I have the graphite version of the DX, and keep seeing references to the USBHack for this device, but none of them link to the actual .bin file.

I've looked in the archives at: http://www.avenard.org/kindle2/ and can't find the the DXG version everyone mentions.

[dettonijr]

It's amazing! Since I bought my Kindle I was looking for a way to get the pc screen on it. Very cool! It made me feel like "Why didn't I think of that?".

kranu, thanks for sharing the code! I hope you don't mind me changing it.

Well, I am thinking about some new features to this, mainly some way of selecting the screen area by clicking on it. But I don't know anything about wxWidgets, so firstly I ported the code to PyGTK.
I am sharing my code here, so people like me (that don't know wx, but know gtk ) can try to add new features too.
This script do the same as the original so far.
I don't know if it will work on Windows, I have tested it on Ubuntu.

[funcky]

Fiurst of all, great app! if anyone can get this running on their kindle DXG (no wifi) this would be awesome.

I have a the VNC viewer working mentioned in antoher post, even downloaded the donated version but I am not too satisfied with it, just want to test this one out (ready to donate as well ;-))

I am particuarly interested to use it as a seperate view and not as a clone which gives troubles with the other somehow.

all help is welcome,

thanks!

[diego.queres]

I have LAN network on PC and i have connected an USB Wireless Adapter, for conect my Computer to a wireless network (and then communicate with Kindle using your application).

The problem is: my device don´t recognizes the LAN ip. And the python only connect using this address. How can i set manually the py archive for my Kindle recognizes the Wireless IP and them see the monitor screenshots on my Kindle screeen?

[geekmaster]

Originally Posted by realitystorm

I have the graphite version of the DX, and keep seeing references to the USBHack for this device, but none of them link to the actual .bin file.

I've looked in the archives at: http://www.avenard.org/kindle2/ and can't find the the DXG version everyone mentions.

The USBnet hack from this page works great on my DXG: https://www.mobileread.com/forums/showthread.php?t=88004

After extracting the files, be sure to install the correct binary for your kindle model and firmware version.

[jmseight]

Hi,

I modified the gtk version for iRiver Story HD (6" 768x1024 display).

This one has the screen rotated, and the Pixbuf made into grayscale. I also reduced the quality of the JPG to 50 to reduce refresh time.

Please see the attached.

#!/usr/bin/python
#eMonitor by Kranu
#Version 2 (9-1-2011)

#modified by jmseight for iRiver Story HD (4-24-2012)
#  Rotate screen 90 deg
#  Made into grayscale image (original is color)
#  Reduce quality for faster load
#  Set to Story HD resolution


#Tested on Windows 7 x64, Python 2.7.2, wxPython 2.8
#For more information, see: http://goo.gl/rJoLp

#+---2-16-2012---+
#This is the same as v2
#Just using pygtk instead of wxWidgets. 
#Tested on Ubuntu

#BEGIN SETUP

#HTTP Server
port=8000              #port of http server (http://127.0.0.1:8000/)

#capture region
#l,t=(1680,1050-800)
l,t=(0,0)              #left and right offset from primary monitor
w,h=(1024,768)          #width and height of capture region
fn ='shot.jpg'         #file name of screenshot
quality = "50"

#//END SETUP

import pygtk, gtk, socket
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer

class serv(BaseHTTPRequestHandler):
  def do_GET(self):
    self.send_response(200)
    if self.path.startswith('/'+fn):
      self.send_header('Content-type','image/jpeg')
      self.end_headers()
  
      screenshot =  gtk.gdk.Pixbuf.rotate_simple(
						gtk.gdk.Pixbuf.get_from_drawable(
							gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, True, 8, w, h),
							gtk.gdk.get_default_root_window(),
							gtk.gdk.colormap_get_system(),
							l, l, 0, 0, w, h),
						gtk.gdk.PIXBUF_ROTATE_COUNTERCLOCKWISE
					)

      screenshot.saturate_and_pixelate(screenshot, 0.0, False)
	  
      screenshot.save(fn, "jpeg", {"quality": quality})

      f=open(fn,'rb')
      self.wfile.write(f.read())
    else:
      self.send_header('Content-type','text/html')
      self.end_headers()
      self.wfile.write('<!doctype html>'\
        '<html lang="en">'\
        '<head>'\
        '<title>eMonitor by Kranu</title>'\
        '</head>'\
        '<body style="margin:0px;">'\
        '<img id="pic" src="'+fn+'" style="float:left;width:100%;height:100%;">'\
        '<script type="text/javascript">'\
        'document.getElementById("pic").onload=function() {'\
        '  document.getElementById("pic").src="'+fn+'?"+(new Date()).getTime();'\
        '}'\
        '</script>'\
        '</body>'\
        '</html>')
try:
  print 'eMonitor by Kranu'

  #Amazon's website is used here for its reliablity. Feel free to change it.
  s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  s.connect(("amazon.com",80))

  print 'Starting.. ',
  server=HTTPServer(('',port),serv)
  print 'Press Ctrl+C to stop'
  print

  print 'On your Story HD, visit http://'+s.getsockname()[0]+':'+str(port)+'/'

  server.serve_forever()
except KeyboardInterrupt:
  print 'Stopping.. ',
  server.socket.close()
  print 'Have a nice day!'

[jmseight]

Hi All,

Please find the enclosed version using wxpython with support for Dithering with geekmaster's formula 42 translated to python.

The screen size can be reduced to 800x600 for Kindle easily.

The dithered variable is set to True or False to turn on or off.

Dithered images are saved as png - for smaller size
Grayscale images are saved as jpg - for smaller size

Thanks,
James

#!/usr/bin/python
#eMonitor
#Version 3 modified by jmseight for Kindle/Story (4-25-2012)
#  Rotate screen 90 deg
#  Support Dithering if turned on (no flash on videos)
#    support cropping of dithering table
#    saves as png for dithered
#    saves as jpeg for grayscale
#  Reduce quality for faster load
#  Uses GeekMaster's Dithering Formula (MIT license)
#  Set to Story HD resolution

#based on eMonitor by Kranu
#Version 2 (9-1-2011)

#Tested on Windows 7 x64, Python 2.7.2, wxPython 2.8
#For more information, see: http://goo.gl/rJoLp

#BEGIN SETUP

#HTTP Server
port=8000              #port of http server (http://127.0.0.1:8000/)

#capture region
#l,t=(1680,1050-800)
l,t=(0,0)              #left and right offset from primary monitor
w,h=(1024,768)          #width and height of capture region
fn ='shot.png'         #file name of screenshot
quality = "50"

dt = [
    3,129,34,160,10,136,42,168,192,66,223,97,200,73,231,105,50,
    176,18,144,58,184,26,152,239,113,207,81,247,121,215,89,14,
    140,46,180,7,133,38,164,203,77,235,109,196,70,227,101,62,188,
    30,156,54,180,22,148,251,125,219,93,243,117,211,85 ] # 0-255 dither table

white = 255     #white threshold
black = 0       #black threshold
dithered = True  #dithered or not

#//END SETUP

import wx,socket
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer

class serv(BaseHTTPRequestHandler):
  def do_GET(self):
    self.send_response(200)
    if self.path.startswith('/'+fn):
      self.send_header('Content-type','image/jpeg')
      self.end_headers()
  
      app=wx.PySimpleApp()
      context=wx.ScreenDC()
      bitmap=wx.EmptyBitmap(w, h, -1)
 
      memory=wx.MemoryDC()
      memory.SelectObject(bitmap)
      memory.Blit(0, 0, w, h, context, l, t)
      memory.SelectObject(wx.NullBitmap)
 
      image=wx.ImageFromBitmap(bitmap)
      data=list(image.GetData())

#      for i in xrange(0,len(data),3):
#        data[i]=data[i+1]=data[i+2]=chr(int(0.2989*float(ord(data[i]))+0.5870*float(ord(data[i+1]))+0.1140*float(ord(data[i+2]))))

      i=0

      if dithered:
        for y in xrange(0,h-1,1):
          for x in xrange(0,w-1,1):
#            i = (y*w + x)*3
#            j = ((y&7)<<3)|x&7
#            intensity = int((298*ord(data[i])+587*ord(data[i+1])+114*ord(data[i+2]))/1000)
            if dt[((y&7)<<3)|x&7] < (ord(data[i])+(ord(data[i+1])<<1)+ord(data[i+2]))>>2:
              data[i] = '\xff'
            else:
              data[i] = '\x00'
            i=i+3
      else:
        for y in xrange(0,h-1,1):
          for x in xrange(0,w-1,1):
#            i = (y*w + x)*3
#            j = ((y&7)<<3)|x&7
#            intensity = int((298*ord(data[i])+587*ord(data[i+1])+114*ord(data[i+2]))/1000)
            data[i] = chr((ord(data[i])+(ord(data[i+1])<<1)+ord(data[i+2]))>>2)
            i=i+3

      image.SetData("".join(data))
      image = image.Rotate90(False)

      if dithered:
        image.SetOption(wx.IMAGE_OPTION_PNG_FORMAT, str(wx.PNG_TYPE_GREY_RED))
        image.SetOption(wx.IMAGE_OPTION_PNG_BITDEPTH, "8")
        image.SaveFile(fn,wx.BITMAP_TYPE_PNG)
      else:
        image.SetOption("quality", quality)
        image.SaveFile(fn,wx.BITMAP_TYPE_JPEG)

      f=open(fn,'rb')
      self.wfile.write(f.read())
    else:
      self.send_header('Content-type','text/html')
      self.end_headers()
      self.wfile.write('<!doctype html>'\
        '<html lang="en">'\
        '<head>'\
        '<title>eMonitor by Kranu</title>'\
        '</head>'\
        '<body style="margin:0px;">'\
        '<img id="pic" src="'+fn+'" style="float:left;width:100%;height:100%;">'\
        '<script type="text/javascript">'\
        'document.getElementById("pic").onload=function() {'\
        '  document.getElementById("pic").src="'+fn+'?"+(new Date()).getTime();'\
        '}'\
        '</script>'\
        '</body>'\
        '</html>')
try:
  print 'eMonitor by jmseight (based on Kranu)'

  for j in xrange(0, len(dt)-1, 1):
    if dt[j] < black:
      dt[j] = black
    if dt[j] > white:
      dt[j] = white

  #Amazon's website is used here for its reliablity. Feel free to change it.
  s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  s.connect(("amazon.com",80))

  print 'Starting.. ',
  server=HTTPServer(('',port),serv)
  print 'Press Ctrl+C to stop'
  print

  print 'On your Kindle/Story, visit http://'+s.getsockname()[0]+':'+str(port)+'/'

  server.serve_forever()
except KeyboardInterrupt:
  print 'Stopping.. ',
  server.socket.close()
  print 'Have a nice day!'

[geekmaster]

Python? Cute.

[jmseight]

Hi,

Actually Python is running a little slow. I tried to optimize the code as much as I can using shifts instead of multiply and divide, etc.

I am now researching how to put c code into Python on my Win 7 environment.

While the grayscale images (wxPython and pygtk) are limited by file size transfer to the SHD (3300~3400msec/frame) for 70~80kB jpeg image, I believe the dithered image (pygtk) is computation limited (~2000msec/frame) for 25~30kB png.

I tried to dither the wxPython code, but it is incredible slow due to computation.

Thanks,
James

[geekmaster]

Originally Posted by jmseight

Hi,

Actually Python is running a little slow. I tried to optimize the code as much as I can using shifts instead of multiply and divide, etc.

I am now researching how to put c code into Python on my Win 7 environment.

While the grayscale images (wxPython and pygtk) are limited by file size transfer to the SHD (3300~3400msec/frame) for 70~80kB jpeg image, I believe the dithered image (pygtk) is computation limited (~2000msec/frame) for 25~30kB png.

I tried to dither the wxPython code, but it is incredible slow due to computation.

Thanks,
James

On modern computers shifts are SLOWER than multiply or divide, and table lookups are slower than long integer computations (like geekmaster formula 42). The "old-school" optimizations actually slow things down, sometimes a LOT.

Read the "Agner Fog" optimization stuff (modern) and the older stuff by Michael Abrash (especially the graphics stuff). Especially, study branch-free and cache-oblivious algorithms, and lock-free queues.

P.S. Read the above links, especially "The Aggregate Magic Algorithms" (please). Although some of this is targetted towards Intel CPUs, the ideas and techniques are applicable to embedded computing as well.

[dsip]

This is brilliant. I'm now using this to view the output pdf of my latex files. I'm not sure this will make me any more productive, but damn, I love it.

[jmseight]

Hi All,

I found that for dithered screen, PNG is the smallest file size. For grayscale, PNG is smaller is there is only text windows on the screen, and JPEG is smaller is there is any photos or video.

I modified the Python program so hat for grayscale, it writes two files, both the jpeg and png. It then determine which is smaller and then updates with the smaller file. Since file transfer remains the largest time component, this results in faster updates.

I have found that with Python, to run fast I need to reduce the over number of operations in the critical loop. So in this version I pre-multiply the dither table by 2, so I can remove the last division by 2 or shift. Also, I used 1:2:1 r:g:b instead of 3:6:1 as this will result in less operations.

#!/usr/bin/python
#eMonitor
#Version 4 modified by jmseight for Kindle/Story (4-26-2012)
#  Rotate screen 90 deg
#  Support Dithering if turned on (no flash on videos)
#    support cropping of dithering table
#    pre-multiple dither table for faster run time
#    saves as png for dithered
#    saves as jpeg and png for grayscale, compare file sizes, then send the smaller file
#  Reduce quality for faster load
#  Uses GeekMaster's Dithering Formula (MIT license)
#  Set to Story HD resolution

#based on eMonitor by Kranu
#Version 2 (9-1-2011)

#Tested on Windows 7 x64, Python 2.7.2, wxPython 2.8
#For more information, see: http://goo.gl/rJoLp

#BEGIN SETUP

#HTTP Server
port=8000              #port of http server (http://127.0.0.1:8000/)

#capture region
#l,t=(1680,1050-800)
l,t=(0,0)              #left and right offset from primary monitor
w,h=(1024,768)          #width and height of capture region
fn1 ='shot1.png'         #file name of screenshot
fn2 ='shot1.jpg'
fn = 'shot.png'
quality = "50"

dt = [
    3,129,34,160,10,136,42,168,192,66,223,97,200,73,231,105,50,
    176,18,144,58,184,26,152,239,113,207,81,247,121,215,89,14,
    140,46,180,7,133,38,164,203,77,235,109,196,70,227,101,62,188,
    30,156,54,180,22,148,251,125,219,93,243,117,211,85 ] # 0-255 dither table

white = 255     #white threshold
black = 0       #black threshold
dithered = False  #dithered or not

#//END SETUP

import wx,socket,os
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer

class serv(BaseHTTPRequestHandler):
  def do_GET(self):
    self.send_response(200)
    if self.path.startswith('/'+fn):
      self.send_header('Content-type','image/jpeg')
      self.end_headers()
  
      app=wx.PySimpleApp()
      context=wx.ScreenDC()
      bitmap=wx.EmptyBitmap(w, h, -1)
 
      memory=wx.MemoryDC()
      memory.SelectObject(bitmap)
      memory.Blit(0, 0, w, h, context, l, t)
      memory.SelectObject(wx.NullBitmap)
 
      image=wx.ImageFromBitmap(bitmap)
      data=list(image.GetData())

#      for i in xrange(0,len(data),3):
#        data[i]=data[i+1]=data[i+2]=chr(int(0.2989*float(ord(data[i]))+0.5870*float(ord(data[i+1]))+0.1140*float(ord(data[i+2]))))

      i=0

      if dithered:
        for y in xrange(0,h-1,1):
          yy=(y&7)<<3
          for x in xrange(0,w-1,1):
#            i = (y*w + x)*3
#            j = ((y&7)<<3)|x&7
#            if dt[yy|x&7] < (ord(data[i])+(ord(data[i+1])<<1)+ord(data[i+2]))>>2:
#            if dt[((y&7)*8)|x&7] < (299*ord(data[i])+587*ord(data[i+1])+114*ord(data[i+2]))/1000 :
            if dt[yy|x&7] < (ord(data[i])+(ord(data[i+1])<<1)+ord(data[i+2])):
              data[i] = '\xff'
            else:
              data[i] = '\x00'
            i=i+3
      else:
        for y in xrange(0,h-1,1):
          for x in xrange(0,w-1,1):
#            i = (y*w + x)*3
#            j = ((y&7)<<3)|x&7
            data[i+2]=data[i+1]=data[i]= chr((ord(data[i])+(ord(data[i+1])<<1)+ord(data[i+2]))>>2)
#            data[i] = chr((ord(data[i])+(ord(data[i+1])<<1)+ord(data[i+2]))>>2)
#            data[i] = chr(int((299*ord(data[i])+587*ord(data[i+1])+144*ord(data[i+2]))/1000))
            i=i+3

      image.SetData("".join(data))
      image = image.Rotate90(False)

      image.SetOption(wx.IMAGE_OPTION_PNG_FORMAT, str(wx.PNG_TYPE_GREY_RED))
      image.SetOption(wx.IMAGE_OPTION_PNG_BITDEPTH, "8")

      if dithered:
        image.SaveFile(fn,wx.BITMAP_TYPE_PNG)
      else:
        image.SaveFile(fn1,wx.BITMAP_TYPE_PNG)
        image.SetOption("quality", quality)
        image.SaveFile(fn2,wx.BITMAP_TYPE_JPEG)
        size1 = os.stat(fn1).st_size
        size2 = os.stat(fn2).st_size
        if size2 < size1:
          image.SaveFile(fn,wx.BITMAP_TYPE_JPEG)
        else:
          image.SaveFile(fn,wx.BITMAP_TYPE_PNG)

      f=open(fn,'rb')
      self.wfile.write(f.read())
    else:
      self.send_header('Content-type','text/html')
      self.end_headers()
      self.wfile.write('<!doctype html>'\
        '<html lang="en">'\
        '<head>'\
        '<title>eMonitor by Kranu</title>'\
        '</head>'\
        '<body style="margin:0px;">'\
        '<img id="pic" src="'+fn+'" style="float:left;width:100%;height:100%;">'\
        '<script type="text/javascript">'\
        'document.getElementById("pic").onload=function() {'\
        '  document.getElementById("pic").src="'+fn+'?"+(new Date()).getTime();'\
        '}'\
        '</script>'\
        '</body>'\
        '</html>')
try:
  print 'eMonitor by jmseight (based on Kranu)'

  for j in xrange(0, len(dt)-1, 1):
    if dt[j] < black:
      dt[j] = black
    if dt[j] > white:
      dt[j] = white
  for j in xrange(0, len(dt)-1, 1):
    dt[j] = dt[j] << 2
    
  #Amazon's website is used here for its reliablity. Feel free to change it.
  s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  s.connect(("amazon.com",80))

  print 'Starting.. ',
  server=HTTPServer(('',port),serv)
  print 'Press Ctrl+C to stop'
  print

  print 'On your Kindle/Story, visit http://'+s.getsockname()[0]+':'+str(port)+'/'

  server.serve_forever()
except KeyboardInterrupt:
  print 'Stopping.. ',
  server.socket.close()
  print 'Have a nice day!'

[hawhill]

maybe it would run with PyPy, further improving speed?

[jmseight]

[UPDATE] I found out that there is a little bug in my code, and these are actually kind resize artifact.

Thanks,
James

Hi Geekmaster,

I don't know if I am doing something wrong, but I am getting some dithering artifacts. Please see the attached screen capture on my K3G.

This is a single cyan image. Please see the diagonal line I can actually see it when I use Youtube video, and the vertical lines (showing as horizontal).

These images were transfereed with lossless PNG so these are not JPEG compression artifacts.

Thanks,
James

[jmseight]

Hi,

I removed the K3G browser resize artifact by setting the screen to 706x600.

This makes perfect dithering.

#!/usr/bin/python
#eMonitor
#Version 4 modified by jmseight for Kindle/Story (4-26-2012)
#  Rotate screen 90 deg
#  Support Dithering if turned on (no flash on videos)
#    support cropping of dithering table
#    pre-multiple dither table for faster run time
#    saves as png for dithered
#    saves as jpeg and png for grayscale, compare file sizes, then send the smaller file
#  Reduce quality for faster load
#  Uses GeekMaster's Dithering Formula (MIT license)
#  Set to Story HD resolution

#based on eMonitor by Kranu
#Version 2 (9-1-2011)

#Tested on Windows 7 x64, Python 2.7.2, wxPython 2.8
#For more information, see: http://goo.gl/rJoLp

#BEGIN SETUP

#HTTP Server
port=8000              #port of http server (http://127.0.0.1:8000/)

#capture region
l,t=(0,0)              #left and right offset from primary monitor
w,h=(706,600)          #width and height of capture region
fn1 ='shot1.png'         #file name of screenshot
fn2 ='shot1.jpg'
fn = 'shot.png'
quality = "50"

dt = [
    3,129,34,160,10,136,42,168,192,66,223,97,200,73,231,105,50,
    176,18,144,58,184,26,152,239,113,207,81,247,121,215,89,14,
    140,46,180,7,133,38,164,203,77,235,109,196,70,227,101,62,188,
    30,156,54,180,22,148,251,125,219,93,243,117,211,85 ] # 0-255 dither table

white = 255     #white threshold
black = 0       #black threshold
dithered = True  #dithered or not

#//END SETUP

import wx,socket,os
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer

class serv(BaseHTTPRequestHandler):
  def do_GET(self):
    self.send_response(200)
    if self.path.startswith('/'+fn):
      self.send_header('Content-type','image/jpeg')
      self.end_headers()
  
      app=wx.PySimpleApp()
      context=wx.ScreenDC()
      bitmap=wx.EmptyBitmap(w, h, -1)
 
      memory=wx.MemoryDC()
      memory.SelectObject(bitmap)
      memory.Blit(0, 0, w, h, context, l, t)
      memory.SelectObject(wx.NullBitmap)
 
      image=wx.ImageFromBitmap(bitmap)
      data=list(image.GetData())

#      for i in xrange(0,len(data),3):
#        data[i]=data[i+1]=data[i+2]=chr(int(0.2989*float(ord(data[i]))+0.5870*float(ord(data[i+1]))+0.1140*float(ord(data[i+2]))))

      i=0

      if dithered:
        for y in xrange(0,h,1):
          yy=(y&7)<<3
#          i=y*w*3
          for x in xrange(0,w,1):
#            j = ((y&7)<<3)|x&7
#            if dt[yy|x&7] < (ord(data[i])+(ord(data[i+1])<<1)+ord(data[i+2]))>>2:
#            if dt[((y&7)*8)|x&7] < (299*ord(data[i])+587*ord(data[i+1])+114*ord(data[i+2]))/1000 :
            if dt[yy|x&7] < (ord(data[i])+(ord(data[i+1])<<1)+ord(data[i+2])):
              data[i] = '\xff'
            else:
              data[i] = '\x00'
            i=i+3
      else:
        for y in xrange(0,h,1):
          for x in xrange(0,w,1):
#            i = (y*w + x)*3
#            j = ((y&7)<<3)|x&7
            data[i+2]=data[i+1]=data[i]= chr((ord(data[i])+(ord(data[i+1])<<1)+ord(data[i+2]))>>2)
#            data[i] = chr((ord(data[i])+(ord(data[i+1])<<1)+ord(data[i+2]))>>2)
#            data[i] = chr(int((299*ord(data[i])+587*ord(data[i+1])+144*ord(data[i+2]))/1000))
            i=i+3

      image.SetData("".join(data))
      image = image.Rotate90(False)

      image.SetOption(wx.IMAGE_OPTION_PNG_FORMAT, str(wx.PNG_TYPE_GREY_RED))
      image.SetOption(wx.IMAGE_OPTION_PNG_BITDEPTH, "8")

      if dithered:
        image.SaveFile(fn,wx.BITMAP_TYPE_PNG)
      else:
        image.SaveFile(fn1,wx.BITMAP_TYPE_PNG)
        image.SetOption("quality", quality)
        image.SaveFile(fn2,wx.BITMAP_TYPE_JPEG)
        size1 = os.stat(fn1).st_size
        size2 = os.stat(fn2).st_size
        if size2 < size1:
          image.SaveFile(fn,wx.BITMAP_TYPE_JPEG)
        else:
          image.SaveFile(fn,wx.BITMAP_TYPE_PNG)

      f=open(fn,'rb')
      self.wfile.write(f.read())
    else:
      self.send_header('Content-type','text/html')
      self.end_headers()
      self.wfile.write('<!doctype html>'\
        '<html lang="en">'\
        '<head>'\
        '<title>eMonitor by Kranu</title>'\
        '</head>'\
        '<body style="margin:0px;">'\
        '<img id="pic" src="'+fn+'" style="float:left;width:100%;height:100%;">'\
        '<script type="text/javascript">'\
        'document.getElementById("pic").onload=function() {'\
        '  document.getElementById("pic").src="'+fn+'?"+(new Date()).getTime();'\
        '}'\
        '</script>'\
        '</body>'\
        '</html>')
try:
  print 'eMonitor by jmseight (based on Kranu)'

  for j in xrange(0, len(dt), 1):
    if dt[j] < black:
      dt[j] = black
    if dt[j] > white:
      dt[j] = white
  for j in xrange(0, len(dt), 1):
    dt[j] = dt[j] * 4
    
  #Amazon's website is used here for its reliablity. Feel free to change it.
  s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  s.connect(("amazon.com",80))

  print 'Starting.. ',
  server=HTTPServer(('',port),serv)
  print 'Press Ctrl+C to stop'
  print

  print 'On your Kindle/Story, visit http://'+s.getsockname()[0]+':'+str(port)+'/'

  server.serve_forever()
except KeyboardInterrupt:
  print 'Stopping.. ',
  server.socket.close()
  print 'Have a nice day!'

Thanks,
James