InstagramRSS - Follow your favorite public accounts from RSS feeds.

PyRSS2Gen.py

"""PyRSS2Gen - A Python library for generating RSS 2.0 feeds."""
""" Distributed under the BSD license here."""

__name__ = "PyRSS2Gen"
__version__ = (1, 1, 0)
__author__ = "Andrew Dalke <dalke@dalkescientific.com>"

_generator_name = __name__ + "-" + ".".join(map(str, __version__))

import datetime

import sys

if sys.version_info[0] == 3:
    # Python 3
    basestring = str
    from io import StringIO
else:
    # Python 2
    try:
        from cStringIO import StringIO
    except ImportError:
        # Very old (or memory constrained) systems might
        # have left out the compiled C version. Fall back
        # to the pure Python one. Haven't seen this sort
        # of system since the early 2000s.
        from StringIO import StringIO

# Could make this the base class; will need to add 'publish'
class WriteXmlMixin:
    def write_xml(self, outfile, encoding = "iso-8859-1"):
        from xml.sax import saxutils
        handler = saxutils.XMLGenerator(outfile, encoding)
        handler.startDocument()
        self.publish(handler)
        handler.endDocument()

    def to_xml(self, encoding = "iso-8859-1"):
        f = StringIO()
        self.write_xml(f, encoding)
        return f.getvalue()


def _element(handler, name, obj, d = {}):
    if isinstance(obj, basestring) or obj is None:
        # special-case handling to make the API easier
        # to use for the common case.
        handler.startElement(name, d)
        if obj is not None:
            handler.characters(obj)
        handler.endElement(name)
    else:
        # It better know how to emit the correct XML.
        obj.publish(handler)

def _opt_element(handler, name, obj):
    if obj is None:
        return
    _element(handler, name, obj)


def _format_date(dt):
    """convert a datetime into an RFC 822 formatted date

    Input date must be in GMT.
    """
    # Looks like:
    #   Sat, 07 Sep 2002 00:00:01 GMT
    # Can't use strftime because that's locale dependent
    #
    # Isn't there a standard way to do this for Python?  The
    # rfc822 and email.Utils modules assume a timestamp.  The
    # following is based on the rfc822 module.
    return "%s, %02d %s %04d %02d:%02d:%02d GMT" % (
            ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"][dt.weekday()],
            dt.day,
            ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
             "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"][dt.month-1],
            dt.year, dt.hour, dt.minute, dt.second)

        
##
# A couple simple wrapper objects for the fields which
# take a simple value other than a string.
class IntElement:
    """implements the 'publish' API for integers

    Takes the tag name and the integer value to publish.
    
    (Could be used for anything which uses str() to be published
    to text for XML.)
    """
    element_attrs = {}
    def __init__(self, name, val):
        self.name = name
        self.val = val
    def publish(self, handler):
        handler.startElement(self.name, self.element_attrs)
        handler.characters(str(self.val))
        handler.endElement(self.name)

class DateElement:
    """implements the 'publish' API for a datetime.datetime

    Takes the tag name and the datetime to publish.

    Converts the datetime to RFC 2822 timestamp (4-digit year).
    """
    def __init__(self, name, dt):
        self.name = name
        self.dt = dt
    def publish(self, handler):
        _element(handler, self.name, _format_date(self.dt))
####

class Category:
    """Publish a category element"""
    def __init__(self, category, domain = None):
        self.category = category
        self.domain = domain
    def publish(self, handler):
        d = {}
        if self.domain is not None:
            d["domain"] = self.domain
        _element(handler, "category", self.category, d)

class Cloud:
    """Publish a cloud"""
    def __init__(self, domain, port, path,
                 registerProcedure, protocol):
        self.domain = domain
        self.port = port
        self.path = path
        self.registerProcedure = registerProcedure
        self.protocol = protocol
    def publish(self, handler):
        _element(handler, "cloud", None, {
            "domain": self.domain,
            "port": str(self.port),
            "path": self.path,
            "registerProcedure": self.registerProcedure,
            "protocol": self.protocol})

class Image:
    """Publish a channel Image"""
    element_attrs = {}
    def __init__(self, url, title, link,
                 width = None, height = None, description = None):
        self.url = url
        self.title = title
        self.link = link
        self.width = width
        self.height = height
        self.description = description
        
    def publish(self, handler):
        handler.startElement("image", self.element_attrs)

        _element(handler, "url", self.url)
        _element(handler, "title", self.title)
        _element(handler, "link", self.link)

        width = self.width
        if isinstance(width, int):
            width = IntElement("width", width)
        _opt_element(handler, "width", width)
        
        height = self.height
        if isinstance(height, int):
            height = IntElement("height", height)
        _opt_element(handler, "height", height)

        _opt_element(handler, "description", self.description)

        handler.endElement("image")

class Guid:
    """Publish a guid

    Defaults to being a permalink, which is the assumption if it's
    omitted.  Hence strings are always permalinks.
    """
    def __init__(self, guid, isPermaLink = 1):
        self.guid = guid
        self.isPermaLink = isPermaLink
    def publish(self, handler):
        d = {}
        if self.isPermaLink:
            d["isPermaLink"] = "true"
        else:
            d["isPermaLink"] = "false"
        _element(handler, "guid", self.guid, d)

class TextInput:
    """Publish a textInput

    Apparently this is rarely used.
    """
    element_attrs = {}
    def __init__(self, title, description, name, link):
        self.title = title
        self.description = description
        self.name = name
        self.link = link

    def publish(self, handler):
        handler.startElement("textInput", self.element_attrs)
        _element(handler, "title", self.title)
        _element(handler, "description", self.description)
        _element(handler, "name", self.name)
        _element(handler, "link", self.link)
        handler.endElement("textInput")
        

class Enclosure:
    """Publish an enclosure"""
    def __init__(self, url, length, type):
        self.url = url
        self.length = length
        self.type = type
    def publish(self, handler):
        _element(handler, "enclosure", None,
                 {"url": self.url,
                  "length": str(self.length),
                  "type": self.type,
                  })

class Source:
    """Publish the item's original source, used by aggregators"""
    def __init__(self, name, url):
        self.name = name
        self.url = url
    def publish(self, handler):
        _element(handler, "source", self.name, {"url": self.url})

class SkipHours:
    """Publish the skipHours

    This takes a list of hours, as integers.
    """
    element_attrs = {}
    def __init__(self, hours):
        self.hours = hours
    def publish(self, handler):
        if self.hours:
            handler.startElement("skipHours", self.element_attrs)
            for hour in self.hours:
                _element(handler, "hour", str(hour))
            handler.endElement("skipHours")

class SkipDays:
    """Publish the skipDays

    This takes a list of days as strings.
    """
    element_attrs = {}
    def __init__(self, days):
        self.days = days
    def publish(self, handler):
        if self.days:
            handler.startElement("skipDays", self.element_attrs)
            for day in self.days:
                _element(handler, "day", day)
            handler.endElement("skipDays")

class RSS2(WriteXmlMixin):
    """The main RSS class.

    Stores the channel attributes, with the "category" elements under
    ".categories" and the RSS items under ".items".
    """
    
    rss_attrs = {"version": "2.0"}
    element_attrs = {}
    def __init__(self,
                 title,
                 link,
                 description,

                 language = None,
                 copyright = None,
                 managingEditor = None,
                 webMaster = None,
                 pubDate = None,  # a datetime, *in* *GMT*
                 lastBuildDate = None, # a datetime
                 
                 categories = None, # list of strings or Category
                 generator = _generator_name,
                 docs = "http://blogs.law.harvard.edu/tech/rss",
                 cloud = None,    # a Cloud
                 ttl = None,      # integer number of minutes

                 image = None,     # an Image
                 rating = None,    # a string; I don't know how it's used
                 textInput = None, # a TextInput
                 skipHours = None, # a SkipHours with a list of integers
                 skipDays = None,  # a SkipDays with a list of strings

                 items = None,     # list of RSSItems
                 ):
        self.title = title
        self.link = link
        self.description = description
        self.language = language
        self.copyright = copyright
        self.managingEditor = managingEditor

        self.webMaster = webMaster
        self.pubDate = pubDate
        self.lastBuildDate = lastBuildDate
        
        if categories is None:
            categories = []
        self.categories = categories
        self.generator = generator
        self.docs = docs
        self.cloud = cloud
        self.ttl = ttl
        self.image = image
        self.rating = rating
        self.textInput = textInput
        self.skipHours = skipHours
        self.skipDays = skipDays

        if items is None:
            items = []
        self.items = items

    def publish(self, handler):
        handler.startElement("rss", self.rss_attrs)
        handler.startElement("channel", self.element_attrs)
        _element(handler, "title", self.title)
        _element(handler, "link", self.link)
        _element(handler, "description", self.description)

        self.publish_extensions(handler)
        
        _opt_element(handler, "language", self.language)
        _opt_element(handler, "copyright", self.copyright)
        _opt_element(handler, "managingEditor", self.managingEditor)
        _opt_element(handler, "webMaster", self.webMaster)

        pubDate = self.pubDate
        if isinstance(pubDate, datetime.datetime):
            pubDate = DateElement("pubDate", pubDate)
        _opt_element(handler, "pubDate", pubDate)

        lastBuildDate = self.lastBuildDate
        if isinstance(lastBuildDate, datetime.datetime):
            lastBuildDate = DateElement("lastBuildDate", lastBuildDate)
        _opt_element(handler, "lastBuildDate", lastBuildDate)

        for category in self.categories:
            if isinstance(category, basestring):
                category = Category(category)
            category.publish(handler)

        _opt_element(handler, "generator", self.generator)
        _opt_element(handler, "docs", self.docs)

        if self.cloud is not None:
            self.cloud.publish(handler)

        ttl = self.ttl
        if isinstance(self.ttl, int):
            ttl = IntElement("ttl", ttl)
        _opt_element(handler, "ttl", ttl)

        if self.image is not None:
            self.image.publish(handler)

        _opt_element(handler, "rating", self.rating)
        if self.textInput is not None:
            self.textInput.publish(handler)
        if self.skipHours is not None:
            self.skipHours.publish(handler)
        if self.skipDays is not None:
            self.skipDays.publish(handler)

        for item in self.items:
            item.publish(handler)

        handler.endElement("channel")
        handler.endElement("rss")

    def publish_extensions(self, handler):
        # Derived classes can hook into this to insert
        # output after the three required fields.
        pass

    
    
class RSSItem(WriteXmlMixin):
    """Publish an RSS Item"""
    element_attrs = {}
    def __init__(self,
                 title = None,  # string
                 link = None,   # url as string
                 description = None, # string
                 author = None,      # email address as string
                 categories = None,  # list of string or Category
                 comments = None,  # url as string
                 enclosure = None, # an Enclosure
                 guid = None,    # a unique string
                 pubDate = None, # a datetime
                 source = None,  # a Source
                 ):
        
        if title is None and description is None:
            raise TypeError(
                "must define at least one of 'title' or 'description'")
        self.title = title
        self.link = link
        self.description = description
        self.author = author
        if categories is None:
            categories = []
        self.categories = categories
        self.comments = comments
        self.enclosure = enclosure
        self.guid = guid
        self.pubDate = pubDate
        self.source = source
        # It sure does get tedious typing these names three times...

    def publish(self, handler):
        handler.startElement("item", self.element_attrs)
        _opt_element(handler, "title", self.title)
        _opt_element(handler, "link", self.link)
        self.publish_extensions(handler)
        _opt_element(handler, "description", self.description)
        _opt_element(handler, "author", self.author)

        for category in self.categories:
            if isinstance(category, basestring):
                category = Category(category)
            category.publish(handler)
        
        _opt_element(handler, "comments", self.comments)
        if self.enclosure is not None:
            self.enclosure.publish(handler)
        _opt_element(handler, "guid", self.guid)

        pubDate = self.pubDate
        if isinstance(pubDate, datetime.datetime):
            pubDate = DateElement("pubDate", pubDate)
        _opt_element(handler, "pubDate", pubDate)

        if self.source is not None:
            self.source.publish(handler)
        
        handler.endElement("item")

    def publish_extensions(self, handler):
        # Derived classes can hook into this to insert
        # output after the title and link elements
        pass

requirements.txt

# You can pip install this file for quick dependency updates

requests==2.21.0
PyRSS2Gen==1.1
beautifulsoup4==4.7.1

setup.py

# short and simple
# Run this script in the same directory as PyRSS2Gen.py
# python setup.py

from distutils.core import setup

setup(name = "PyRSS2Gen",
      version = "1.1",
      description = "Generate RSS2 using a Python data structure",
      author = "Andrew Dalke",
      author_email = "dalke@dalkescientific.com",
      url = "http://dalkescientific.com/Python/PyRSS2Gen.html",
      license = "BSD",
      py_modules = ["PyRSS2Gen"])

subscribe.py

# Standard library imports
import datetime, json, os, re, sys, time

# pip install these guys
import requests
from bs4 import BeautifulSoup

# Download this from source
# (or grab the source in this gist)
import PyRSS2Gen

"""
This script generates an XML document for a public
Instagram account you can subscribe to in a RSS
reader.

This is only for creating the intial feed.

Inspired by Andy Barefoot's Medium post:
https://medium.com/@andybarefoot/adding-instagram-photos-to-my-site-with-angularjs-a3eb2a436746

USAGE:
  python subscribe.py username
"""

# Get the username of the person you want an RSS feed for
username = sys.argv[1]

rss = PyRSS2Gen.RSS2(
    title="InstagramRSS - " + username,
    link="https://instagram.com/" + username,
    description="An RSS feed for Instagram written in Python",
    lastBuildDate=datetime.datetime.now()
)

# Open the account page
url = 'https://instagram.com/' + username
request = requests.get(url)

# Scrape the page
soup = BeautifulSoup(request.text, 'html.parser')

# Find the <script> tag with window._sharedData
raw = soup.find('script', text=re.compile('window._sharedData')).text

# Remove the HTML elements
cut = raw[21:-1]

# Turn it into JSON
json_data = json.loads(cut)

#  The list of uploads on this page
# Go deeper with your JSON, Facebook.
uploads = json_data["entry_data"]["ProfilePage"][0]["graphql"]["user"]["edge_owner_to_timeline_media"]["edges"]

for img in uploads:
    if img["node"]["edge_media_to_caption"]["edges"]:
        caption = img["node"]["edge_media_to_caption"]["edges"][0]["node"]["text"]
    else:
        caption = "No caption given"
    photo_url = img["node"]["display_url"]
    # owner = img["node"]["owner"]["username"]
    timestamp = img["node"]["taken_at_timestamp"]
    height = str(img["node"]["dimensions"]["height"])
    width = str(img["node"]["dimensions"]["width"])

    rss.items.append(
        PyRSS2Gen.RSSItem(
            title=caption[:25],
            link="https://instagram.com/p/" + img["node"]["shortcode"],
            description=caption + "<br /><img src='" + photo_url +
            "' width='" + width + "' height='" + height + "'/>",
            guid=PyRSS2Gen.Guid("https://instagram.com/p/" +
                                img["node"]["shortcode"]),
            pubDate=datetime.datetime.fromtimestamp(timestamp)
        )
    )

# Write the XML in the current working directory.
rss.write_xml(open(os.path.join(static_path, username + ".xml"), "w"))

update.py

import datetime, json, os, re, sys, time
import xml.etree.ElementTree as ET
from bs4 import BeautifulSoup
import requests

"""
This will update the defined XML document with new
items based on date. This is a little hacky right now
so don't be surprised if it breaks.

To prevent losing the base doc, a newfile is created
rather than overwriting the original.

USAGE:
  python update.py username
"""

# This is taken directly from PyRSS2Gen to format
# the pubDate tag. It's under a BSD license, so we're cool.
def _format_date(dt):
    """convert a datetime into an RFC 822 formatted date

    Input date must be in GMT.
    """
    # Looks like:
    #   Sat, 07 Sep 2002 00:00:01 GMT
    # Can't use strftime because that's locale dependent
    #
    # Isn't there a standard way to do this for Python?  The
    # rfc822 and email.Utils modules assume a timestamp.  The
    # following is based on the rfc822 module.
    return "%s, %02d %s %04d %02d:%02d:%02d GMT" % (
        ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"][dt.weekday()],
        dt.day,
        ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"][dt.month-1],
        dt.year, dt.hour, dt.minute, dt.second)

def main():
  # Get the feed
  username = sys.argv[1]
  feed = open('your/file/path/' + username + '.xml')

  # Init an object for the tree
  tree = ET.parse(feed)
  root = tree.getroot()

  # Find all existing items in the feed
  items = root[0].findall("item")

  # Hopefully, the first one is the most recent.
  # This is the hacky part.
  last_update = items[0].find('pubDate')
  
  # turn the date into a timestamp to compare
  last_update_timestamp = datetime.datetime.timestamp(datetime.datetime.strptime(last_update.text, "%a, %d %B %Y %H:%M:%S %Z"))

  # grab the account
  url = 'https://instagram.com/' + username
  request = requests.get(url)

  # Make some soup
  soup = BeautifulSoup(request.text, 'html.parser')

  # Find the <script> tag with window._sharedData
  raw = soup.find('script', text=re.compile('window._sharedData')).text
  cut = raw[21:-1]
  json_data = json.loads(cut)

  #  Seriously, could this be deeper?
  # This is all of the uploads.
  uploads = json_data["entry_data"]["ProfilePage"][0]["graphql"]["user"]["edge_owner_to_timeline_media"]["edges"]

  for img in uploads:
      # Set a variable for the date of the photo in the loop
      date = img["node"]["taken_at_timestamp"]

      # If the photo is newer, create a node and add it to the XML
      if date > last_update_timestamp:
          if img["node"]["edge_media_to_caption"]["edges"]:
              caption = img["node"]["edge_media_to_caption"]["edges"][0]["node"]["text"]
          else:
              caption = "No caption given"
          photo_url = img["node"]["display_url"]
          timestamp = img["node"]["taken_at_timestamp"]
          height = str(img["node"]["dimensions"]["height"])
          width = str(img["node"]["dimensions"]["width"])
          
          # Format the timestamp into a string
          pub_date = _format_date(datetime.datetime.fromtimestamp(timestamp))

          new_item = ET.SubElement(root, 'item')
          ET.SubElement(new_item, 'title').text = caption[:25]
          ET.SubElement(new_item, 'link').text = photo_url
          ET.SubElement(new_item, 'description').text = caption + "<br /><img src='" + photo_url + "' width='" + width + "' height='" + height + "'/>"
          ET.SubElement(new_item, 'guid').text = "https://instagram.com/p/" + img["node"]["shortcode"]
          ET.SubElement(new_item, 'pubDate').text = pub_date
          
          # Write the new item at the 5th index, which _should_ be the first <item> tag.
          root[0].insert(5, new_item)
          
          # update the last build date for the feed
          root[0].find('lastBuildDate').text = pub_date
          
          # Save as a new file in case something goes horribly, horribly wrong.
          tree.write('cogdog1.xml')

if __name__:
    main()