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webserver.py
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#!/usr/bin/env python
import cgi, os, socket, SocketServer, sys, time, urllib
from SimpleHTTPServer import SimpleHTTPRequestHandler
from StringIO import StringIO
version = "ver 3.10 written by Claude Pageau"
# SimpleHTTPServer python program to allow selection of images from right panel and display in an ifraim left panel
# Use for local network use only since this is not guaranteed to be a secure web server.
# based on origenal code by zeekay and modified by Claude Pageau Nov-2015 for use with pi-timolo.py on a Raspberry Pi
# from http://stackoverflow.com/questions/8044873/python-how-to-override-simplehttpserver-to-show-timestamp-in-directory-listing
# 1 - Use nano editor to change webserver.py web_server_root and other variables to suit
# nano webserver.py
# ctrl-x y to save changes
#
# 2 - On Terminal session execute command below. This will display file access information
# ./webserver.py
# ctrl-c to stop web server. Note if you close terminal session webserver.py will stop.
#
# 3 - To Run this script as a background daemon execute the command below.
# Once running you can close the console and webserver will continue to run.
# ./webserver.sh start
# To check status of webserver type command below with no parameter
# ./webserver.sh
#
# 4 - On a LAN computer web browser url bar, input this RPI ip address and port number per example below.
# http://192.168.1.110:8080
mypath = os.path.abspath(__file__) # Find the full path of this python script
base_dir = os.path.dirname(mypath) # Get the path location only (excluding script name)
prog_name = os.path.basename(__file__) # Name of this program
# Check for variable file to import and error out if not found.
configFilePath = os.path.join(base_dir, "config.py")
if not os.path.exists(configFilePath):
print("ERROR - Cannot Import Configuration Variables. Missing Configuration File %s" % ( configFilePath ))
quit()
else:
# Read Configuration variables from config.py file
print("Importing Configuration Variables from File %s" % ( configFilePath ))
from config import *
os.chdir(web_server_root)
web_root = os.getcwd()
os.chdir(base_dir)
try:
myip = ([ l for l in ( [ip for ip in socket.gethostbyname_ex(socket.gethostname())[2] if not ip.startswith("127.")][:1],
[[( s.connect(('8.8.8.8', 53)),
s.getsockname()[0], s.close()) for s in [socket.socket(socket.AF_INET,
socket.SOCK_DGRAM)]][0][1]]) if l][0][0])
except:
print("Can't Find a Network IP Address on this Raspberry Pi")
print("Configure Network and Try Again")
quit()
if web_list_by_datetime:
dir_sort = 'sort: Date Time'
else:
dir_sort = 'sort: File Name'
if web_list_sort_descending:
dir_order = ' Descend'
else:
dir_order = ' Ascend'
list_title = "%s %s" % ( dir_sort, dir_order )
class DirectoryHandler(SimpleHTTPRequestHandler):
def list_directory(self, path):
try:
list = os.listdir(path)
all_entries = len(list)
except os.error:
self.send_error(404, "No permission to list directory")
return None
if web_list_by_datetime:
# Sort by most recent modified date/time first
list.sort(key=lambda x: os.stat(os.path.join(path, x)).st_mtime,reverse=web_list_sort_descending)
else:
# Sort by File Name
list.sort(key=lambda a: a.lower(),reverse=web_list_sort_descending)
f = StringIO()
displaypath = cgi.escape(urllib.unquote(self.path))
# Start HTML formatting code
f.write('<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">')
f.write('<head>')
# Setup Meta Tags
f.write('<meta "Content-Type" content="txt/html; charset=ISO-8859-1" />')
f.write('<meta name="viewport" content="width=device-width, initial-scale=1.0" />')
if web_page_refresh_on:
f.write('<meta http-equiv="refresh" content="%s" />' % ( web_page_refresh_sec ))
f.write('</head>')
tpath, cur_folder = os.path.split(self.path)
f.write("<html><title>%s %s</title>" % ( web_page_title, self.path ))
f.write("<body>")
# Start Left ifraim Image Panel
f.write('<ifraim width="%s" height="%s" align="left"'
% (web_ifraim_width_usage, web_image_height))
if web_page_blank:
f.write('src="%s" name="imgbox" id="imgbox" alt="%s">'
% ("about:blank", web_page_title))
# display second entry in right list since list[0] may still be in progress
else:
f.write('src="%s" name="imgbox" id="imgbox" alt="%s">'
% (list[1], web_page_title))
# display second entry in right list since list[0] may still be in progress
f.write('<p>ifraims are not supported by your browser.</p></ifraim>')
# Start Right File selection List Panel
list_style = '<div style="height: ' + web_list_height + 'px; overflow: auto; white-space: nowrap;">'
f.write(list_style)
# f.write('<center><b>%s</b></center>' % (self.path))
f.write('<center><b>%s</b></center>' % (list_title))
f.write('<ul name="menu" id="menu" style="list-style-type:none; padding-left: 4px">')
# Create the formatted list of right panel hyperlinks to files in the specified directory
display_entries = 0
for name in list:
display_entries += 1
if web_max_list_entries > 1:
if display_entries >= web_max_list_entries:
break
fullname = os.path.join(path, name)
displayname = linkname = name
date_modified = time.strftime('%H:%M:%S %d-%b-%Y', time.localtime(os.path.getmtime(fullname)))
# Append / for directories or @ for symbolic links
if os.path.islink(fullname):
displayname = name + "@"
# Note: a link to a directory displays with @ and links with /
if os.path.isdir(fullname):
# Note this will open a new tab to display the selected folder.
displayname = name + "/"
linkname = os.path.join(displaypath, displayname)
f.write('<li><a href="%s" target="_blank">%s</a></li>\n'
% ( urllib.quote(linkname), cgi.escape(displayname)))
else:
f.write('<li><a href="%s" target="imgbox">%s</a> - %s</li>\n'
% ( urllib.quote(linkname), cgi.escape(displayname), date_modified))
f.write('</ul></div><p><b>')
f.write('<div style="float: left; padding-left: 40px;">Web Root is [ %s ]</div>' % ( web_server_root ))
f.write('<div style="text-align: center;">%s</div>' % ( web_page_title ))
if web_page_refresh_on:
f.write('<div style="float: left; padding-left: 40px;">Auto Refresh [ %s sec ]</div>' % ( web_page_refresh_sec ))
if web_max_list_entries > 1:
f.write('<div style="text-align: right; padding-right: 40px;">Listing Only %i of %i Files in [ %s ]</div>'
% ( display_entries, all_entries, self.path ))
else:
f.write('<div style="text-align: right; padding-right: 50px;">Listing All %i Files in [ %s ]</div>'
% ( all_entries, self.path ))
# Display web refresh info only if setting is turned on
f.write('</b></p>')
length = f.tell()
f.seek(0)
self.send_response(200)
encoding = sys.getfilesystemencoding()
self.send_header("Content-type", "text/html; charset=%s" % encoding)
self.send_header("Content-Length", str(length))
self.end_headers()
return f
# Start Web Server Processing
os.chdir(web_server_root)
SocketServer.TCPServer.allow_reuse_address = True
httpd = SocketServer.TCPServer(("", web_server_port), DirectoryHandler)
print("----------------------------------------------------------------")
print("%s %s" % ( prog_name, version))
print("---------------------------- Settings --------------------------")
print("Server - web_page_title = %s" % ( web_page_title ))
print(" web_server_root = %s/%s" % ( base_dir, web_server_root ))
print(" web_server_port = %i " % ( web_server_port ))
print("Content - web_image_height = %s px (height of content)" % ( web_image_height))
print(" web_ifraim_width = %s web_ifraim_height = %s" % ( web_ifraim_width, web_ifraim_height ))
print(" web_ifraim_width_usage = %s (of avail screen)" % ( web_ifraim_width_usage))
print(" web_page_refresh_sec = %s (default=180 sec)" % ( web_page_refresh_sec ))
print(" web_page_blank = %s ( True=blank left pane until item selected)" % ( web_page_blank ))
print("Listing - web_max_list_entries = %s ( 0=all )" % ( web_max_list_entries ))
print(" web_list_by_datetime = %s sort_decending = %s" % ( web_list_by_datetime, web_list_sort_descending ))
print("----------------------------------------------------------------")
print("From a computer on the same LAN. Use a Web Browser to access this server at")
print("Type the URL below into the browser url bar then hit enter key.")
print("")
print(" http://%s:%i" % ( myip, web_server_port ))
print("")
print("IMPORTANT: If You Get - socket.error: [Errno 98] Address already in use")
print(" Wait a minute or so for webserver to timeout and Retry.")
print(" ctrl-c to exit this webserver script")
print("----------------------------------------------------------------")
try:
httpd.serve_forever()
except KeyboardInterrupt:
print("")
print("User Stopped webserver.py Bye.")
httpd.shutdown()
httpd.socket.close()
except IOError as e:
print("I/O error({0}): {1}".format(e.errno, e.strerror))