From b329a335ad10648e64b3de049c083bc04638a072 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Fri, 19 Sep 2014 08:48:17 +0200 Subject: Imported Upstream version 1.7.2 --- .gitignore | 7 ++ LICENSE | 339 ++++++++++++++++++++++++++++++++++++++++++++++++++++ README.md | 125 +++++++++++++++++++ config_template.py | 56 +++++++++ mwc.py | 345 +++++++++++++++++++++++++++++++++++++++++++++++++++++ mwcfeedserver.py | 43 +++++++ 6 files changed, 915 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 README.md create mode 100644 config_template.py create mode 100755 mwc.py create mode 100755 mwcfeedserver.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..4ccd411 --- /dev/null +++ b/.gitignore @@ -0,0 +1,7 @@ +/soupselect.py +/config.py +/config_*.py +/*.txt +*~ +*.pyc + diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..ce58946 --- /dev/null +++ b/LICENSE @@ -0,0 +1,339 @@ +GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + Python script to keep track of website changes (or parts of websites); sends email notifications on updates + Copyright (C) 2013 Debianguru + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + {signature of Ty Coon}, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/README.md b/README.md new file mode 100644 index 0000000..7419ad2 --- /dev/null +++ b/README.md @@ -0,0 +1,125 @@ +# MailWebsiteChanges + +Python script to keep track of website changes; sends email notifications on updates and/or also provides an RSS feed + +To specify which parts of a website should be monitored, XPath selectors (e.g. "//h1"), CSS selectors (e.g. "h1"), and regular expressions can be used (just choose the tools you like!). + +MailWebsiteChanges is related to PageMonitor for Chrome and AlertBox / Check4Change for Firefox. However, instead of living in your web browser, you can run it independently from command line / bash and install it as a simple cron job running on your linux server. + + +This is Open Source -- so please contribute eagerly! ;-) + + +## Configuration +Configuration can be done by creating a config.py file (just place this file in the program folder): +Some examples: + +### Website definitions +
+
+sites = [
+
+          {'shortname': 'mywebsite1',
+           'uri': 'http://www.mywebsite1.com/info',
+           'contentcss': 'div'},
+
+          {'shortname': 'mywebsite2',
+           'uri': 'http://www.mywebsite2.com/info',
+           'contentxpath': '//*[contains(concat(\' \', normalize-space(@class), \' \'), \' news-list-container \')]',
+           'titlexpath': '//title'},
+
+          {'shortname': 'mywebsite3',
+           'uri': 'http://www.mywebsite3.com/info',
+           'type': 'text',
+           'contentregex': 'Version\"\:\d*\.\d*'}
+
+]
+
+
+ + * parameters: + + * shortname + short name of the entry, used as an identifier when sending email notifications + * uri + URI of the website; If the scheme of the uri is 'cmd://', the string is interpreted as a command and the standard output (stdout) is parsed. + * type (optional; default: 'html') + content type, e.g., 'xml'/'html'/'text'. + * contentxpath / titlexpath (optional) + XPath expression for the content/title sections to extract. If you prefer, you could use contentcss/titlecss instead. + * contentcss / titlecss (optional) + CSS expression for the content/title sections to extract. This is ignored if there is a corresponding XPath definition. + * contentregex / titleregex (optional) + Regular expression. If XPath/CSS selector is defined, the regular expression is applied afterwards. + * encoding (optional; default: 'utf-8') + Character encoding of the website, e.g., 'utf-8' or 'iso-8859-1'. + * receiver (optional) + Overwrites global receiver specification. + + + * We collect some XPath/CSS snippets at this place: Snippet collection - please feel free to add your own definitions! + + * The --dry-run="shortname" option might be useful in order to validate and fine-tune a definition. + + * If you would like to keep the data stored in a different place than the working directory, you can include something like this: + 
+   
+  os.chdir('/path/to/data/directory')
+   
+
+ +### Mail settings +
+
+enableMailNotifications = True   #enable/disable notification messages; if set to False, only send error messages
+subjectPostfix = 'A website has been updated!'
+
+sender = 'me@mymail.com'
+smtphost = 'mysmtpprovider.com'
+useTLS = True
+smtpport = 587
+smtpusername = sender
+smtppwd = 'mypassword'
+receiver = 'me2@mymail.com'   # set to '' to also disable notifications in case of errors (not recommended)
+
+
+ + +### RSS Feeds +If you prefer to use the RSS feature, you just have to specify the path of the feed file which should be generated by the script (e.g., rssfile = 'feed.xml') and then point your webserver to that file. You can also invoke the mwcfeedserver.py script which implements a very basic webserver. + +
+ 
+enableRSSFeed = True   #enable/disable RSS feed
+
+rssfile = 'feed.xml'
+maxFeeds = 100
+ 
+
+ + +### Program execution +To setup a job that periodically runs the script, simply attach something like this to your /etc/crontab: +
+ 
+0 8-22/2    * * *   root	/usr/bin/python3 /usr/bin/mwc
+ 
+
+This will run the script every two hours between 8am and 10pm. + +If you prefer invoking the script with an alternate configuration files, simply pass the name of the configuration file as an argument, e.g., for my_alternate_config.py, use mwc --config=my_alternate_config. + + +## Requirements +Requires Python 3, lxml, and cssselect. +For Ubuntu 12.04, type: + + * sudo apt-get install python3 python3-dev python3-setuptools libxml2 libxslt1.1 libxml2-dev libxslt1-dev python-libxml2 python-libxslt1 + * sudo easy\_install3 pip + * sudo pip-3.2 install lxml cssselect + +For Ubuntu 14.04, type: + + * sudo apt-get install python3-lxml python3-pip + * sudo pip3 install cssselect + diff --git a/config_template.py b/config_template.py new file mode 100644 index 0000000..d7069bb --- /dev/null +++ b/config_template.py @@ -0,0 +1,56 @@ +import os.path + +# Copyright: (2013-2014) Michael Till Beck +# License: GPL-2.0+ + +#We collect xpath snippets at this place: Snippet collection - please feel free to add your own definitions! + +sites = [ + + {'shortname': 'mywebsite1', + 'uri': 'http://www.mywebsite1.com/info', + 'type': 'html', + 'titlexpath': '//h1', + 'contentxpath': '//div', + 'titleregex': '', + 'contentregex': '', + 'encoding': 'utf-8'}, + + {'shortname': 'mywebsite2', + 'uri': 'http://www.mywebsite2.com/info', + 'type': 'html', + 'contentxpath': '//*[contains(concat(\' \', normalize-space(@class), \' \'), \' news-list-container \')]', + 'regex': '', + 'encoding': 'utf-8'}, + + {'shortname': 'mywebsite3', + 'uri': 'http://www.mywebsite3.com/info', + 'type': 'text', + 'contentxpath': '', + 'contentregex': 'Version\"\:\d*\.\d*', + 'encoding': 'utf-8'}, + + {'shortname': 'lscmd', + 'uri': 'cmd://ls -l /home/pi', + 'contentregex': '.*Desktop.*' + } + +] + +subjectPostfix = 'A website has been updated!' + +enableMailNotifications = True +sender = 'me@mymail.com' +smtphost = 'mysmtpprovider.com' +useTLS = True +smtpport = 587 +smtpusername = sender +smtppwd = 'mypassword' +receiver = 'me2@mymail.com' + +os.chdir('/var/cache/mwc') + +enableRSSFeed = True +rssfile = 'feed.xml' +maxFeeds = 100 + diff --git a/mwc.py b/mwc.py new file mode 100755 index 0000000..5d7278e --- /dev/null +++ b/mwc.py @@ -0,0 +1,345 @@ +#!/usr/bin/python3 + +# Copyright: (2013-2014) Michael Till Beck +# License: GPL-2.0+ + +import urllib.request, urllib.error, urllib.parse +import urllib.parse +from lxml import etree +from cssselect import GenericTranslator +import re +import io + +import smtplib +from email.mime.text import MIMEText +from email.header import Header +from urllib.parse import urljoin + +import os +import sys +import getopt +import traceback + +import subprocess + +import time +from time import strftime +import random + +import importlib +config = None + +defaultEncoding = 'utf-8' +maxTitleLength = 150 + +# this is how an empty feed looks like +emptyfeed = """ + + + MailWebsiteChanges Feed + https://github.com/Debianguru/MailWebsiteChanges + MailWebsiteChanges Feed + +""" + +# Attributes in HTML files storing URI values. These values are automatically translated to absolute URIs. +uriAttributes = [['//img[@src]', 'src'], ['//a[@href]', 'href']] +cmdscheme = 'cmd://' + +mailsession = None + + +# translates all relative URIs found in trees to absolute URIs +def toAbsoluteURIs(trees, baseuri): + for tree in trees: + for uriAttribute in uriAttributes: + tags = tree.xpath(uriAttribute[0]) + for tag in tags: + if tag.attrib.get(uriAttribute[1]) != None: + if urllib.parse.urlparse(tag.attrib[uriAttribute[1]]).scheme == '': + tag.attrib[uriAttribute[1]] = urllib.parse.urljoin(baseuri, tag.attrib[uriAttribute[1]]) + + +def parseSite(site): + file, content, titles, warning = None, None, None, None + + uri = site['uri'] + contenttype = site.get('type', 'html') + contentregex = site.get('contentregex', '') + titleregex = site.get('titleregex', '') + enc = site.get('encoding', defaultEncoding) + + contentxpath = site.get('contentxpath', '') + if contentxpath == '' and site.get('contentcss', '') != '': + # CSS + contentxpath = GenericTranslator().css_to_xpath(site.get('contentcss')) + titlexpath = site.get('titlexpath', '') + if titlexpath == '' and site.get('titlecss', '') != '': + titlexpath = GenericTranslator().css_to_xpath(site.get('titlecss')) + + try: + + if uri.startswith(cmdscheme): + # run command and retrieve output + process = subprocess.Popen(uri[len(cmdscheme):], stdout=subprocess.PIPE, shell=True, close_fds=True) + file = process.stdout + else: + # open website + file = urllib.request.urlopen(uri) + + + if contenttype == 'text' or (contentxpath == '' and titlexpath == ''): + contents = [file.read().decode(enc)] + titles = [] + else: + baseuri = uri + if contenttype == 'html': + parser = etree.HTMLParser(encoding=enc) + else: + parser = etree.XMLParser(recover=True, encoding=enc) + + tree = etree.parse(file, parser) + + # xpath + contentresult = tree.xpath(contentxpath) if contentxpath else [] + titleresult = tree.xpath(titlexpath) if titlexpath else [] + + # translate relative URIs to absolute URIs + if contenttype == 'html': + basetaglist = tree.xpath('/html/head/base') + if len(basetaglist) != 0: + baseuri = basetaglist[0].attrib['href'] + if len(contentresult) != 0: + toAbsoluteURIs(contentresult, baseuri) + if len(titleresult) != 0: + toAbsoluteURIs(titleresult, baseuri) + + if contentxpath != '' and titlexpath != '' and len(contentresult) != len(titleresult): + warning = 'WARNING: number of title blocks (' + str(len(titleresult)) + ') does not match number of content blocks (' + str(len(contentresult)) + ')' + elif contentxpath and len(contentresult) == 0: + warning = 'WARNING: content selector became invalid!' + elif titlexpath and len(titleresult) == 0: + warning = 'WARNING: title selector became invalid!' + else: + if len(contentresult) == 0: + contentresult = titleresult + if len(titleresult) == 0: + titleresult = contentresult + + contents = [etree.tostring(s, encoding=defaultEncoding, pretty_print=True).decode(defaultEncoding) for s in contentresult] + titles = [getSubject(' '.join(s.xpath('.//text()'))) for s in titleresult] + + except IOError as e: + warning = 'WARNING: could not open URL; maybe content was moved?\n\n' + str(e) + + if file is not None: + file.close() + + if uri.startswith(cmdscheme) and process.wait() != 0: + warning = 'WARNING: process terminated with an error' + + if warning: + return {'content': content, 'titles': titles, 'warning': warning} + + # parse regex + if contentregex: + contents = [x for y in [re.findall(r'' + contentregex, c, re.S) for c in contents] for x in y] + if titleregex: + titles = [x for y in [re.findall(r'' + titleregex, c, re.S) for c in titles] for x in y] + + if contentregex and titleregex and len(contents) != len(titles): + warning = 'WARNING: number of title blocks (' + str(len(titles)) + ') does not match number of content blocks (' + str(len(contents)) + ') after regex' + elif contentregex and len(contents) == 0: + warning = 'WARNING: content regex became invalid!' + elif titleregex and len(titles) == 0: + warning = 'WARNING: title regex became invalid!' + else: + if len(contents) == 0: + contents = titles + if len(titles) == 0: + titles = [getSubject(c) for c in contents] + + return {'contents': contents, 'titles': titles, 'warning': warning} + + +# returns a short subject line +def getSubject(textContent): + if textContent == None or textContent == '': + return config.subjectPostfix + textContent = re.sub(' +', ' ', re.sub('\s', ' ', textContent)).strip() + return (textContent[:maxTitleLength] + ' [..]') if len(textContent) > maxTitleLength else textContent + + +# generates a new RSS feed item +def genFeedItem(subject, content, link, change): + feeditem = etree.Element('item') + titleitem = etree.Element('title') + titleitem.text = subject + ' #' + str(change) + feeditem.append(titleitem) + linkitem = etree.Element('link') + linkitem.text = link + feeditem.append(linkitem) + descriptionitem = etree.Element('description') + descriptionitem.text = content + feeditem.append(descriptionitem) + guiditem = etree.Element('guid') + guiditem.text = str(random.getrandbits(32)) + feeditem.append(guiditem) + dateitem = etree.Element('pubDate') + dateitem.text = strftime("%a, %d %b %Y %H:%M:%S %Z", time.localtime()) + feeditem.append(dateitem) + + return feeditem + + +# sends mail notification +def sendmail(receiver, subject, content, sendAsHtml, link): + global mailsession + + if sendAsHtml: + baseurl = None + if link != None: + content = '

' + subject + '

\n' + content + baseurl = urljoin(link, '/') + mail = MIMEText('' + subject + '' + ('' if baseurl else '') + '' + content + '', 'html', defaultEncoding) + else: + if link != None: + content = link + '\n\n' + content + mail = MIMEText(content, 'text', defaultEncoding) + + mail['From'] = config.sender + mail['To'] = receiver + mail['Subject'] = Header(subject, defaultEncoding) + + # initialize session once, not each time this method gets called + if mailsession is None: + mailsession = smtplib.SMTP(config.smtphost, config.smtpport) + if config.useTLS: + mailsession.ehlo() + mailsession.starttls() + mailsession.login(config.smtpusername, config.smtppwd) + + mailsession.sendmail(config.sender, receiver.split(','), mail.as_string()) + + +# returns a list of all content that is stored locally for a specific site +def getFileContents(shortname): + result = [] + for f in os.listdir('.'): + if f.startswith(shortname + '.') and f.endswith('.txt'): + file = open(f, 'r') + result.append(file.read()) + file.close() + return result + + +# updates list of content that is stored locally for a specific site +def storeFileContents(shortname, parseResult): + for f in os.listdir('.'): + if f.startswith(shortname + '.') and f.endswith('.txt'): + os.remove(f) + + i = 0 + for c in parseResult['contents']: + file = open(shortname + '.' + str(i) + '.txt', 'w') + file.write(c) + file.close() + i += 1 + + +def pollWebsites(): + + # parse existing feed or create a new one + if config.enableRSSFeed: + if os.path.isfile(config.rssfile): + feedXML = etree.parse(config.rssfile) + else: + feedXML = etree.parse(io.StringIO(emptyfeed)) + + # start polling sites + for site in config.sites: + + print('polling site [' + site['shortname'] + '] ...') + parseResult = parseSite(site) + receiver = site.get('receiver', config.receiver) + + # if something went wrong, notify the user + if parseResult['warning']: + subject = '[' + site['shortname'] + '] WARNING' + print('WARNING: ' + parseResult['warning']) + if config.enableMailNotifications: + sendmail(receiver, subject, parseResult['warning'], False, None) + if config.enableRSSFeed: + feedXML.xpath('//channel')[0].append(genFeedItem(subject, parseResult['warning'], site['uri'], 0)) + else: + # otherwise, check which parts of the site were updated + changes = 0 + fileContents = getFileContents(site['shortname']) + i = 0 + for content in parseResult['contents']: + if content not in fileContents: + changes += 1 + + subject = '[' + site['shortname'] + '] ' + parseResult['titles'][i] + print(' ' + subject) + if config.enableMailNotifications and len(fileContents) > 0: + sendmail(receiver, subject, content, (site.get('type', 'html') == 'html'), site['uri']) + + if config.enableRSSFeed: + feedXML.xpath('//channel')[0].append(genFeedItem(subject, content, site['uri'], changes)) + i += 1 + + + if changes > 0: + storeFileContents(site['shortname'], parseResult) + print(' ' + str(changes) + ' updates') + + # store feed + if config.enableRSSFeed: + for o in feedXML.xpath('//channel/item[position() +# License: GPL-2.0+ + +import http.server +import socketserver +import importlib +import sys +import getopt + +bind = 'localhost' +port = 8000 +configMod = 'config' + + +try: + opts, args = getopt.getopt(sys.argv[1:], 'hc:b:p:', ['help', 'config=', 'bind=', 'port=']) +except getopt.GetoptError: + print('Usage: FeedServer.py --config=config --port=8000') + sys.exit(1) + +for opt, arg in opts: + if opt == '-h': + print('Usage: FeedServer.py --config=config --bind=localhost --port=8000') + exit() + elif opt in ('-c', '--config'): + configMod = arg + elif opt in ('-b', '--bind'): + bind = arg + elif opt in ('-p', '--port'): + port = int(arg) + +config = importlib.import_module(configMod) + + +handler = http.server.SimpleHTTPRequestHandler + +httpd = socketserver.TCPServer((bind, port), handler) + +print('Bond to ' + bind + ', listening on port ' + str(port)) +httpd.serve_forever() + -- cgit v1.2.3