X-Git-Url: https://git.sommitrealweird.co.uk/rss2maildir.git/blobdiff_plain/90290ad5357a0a76f87373ae9768f8b10cdef507..0c879280385e1ebc874403357f8f6ce4664e0b4e:/rss2maildir.py?ds=inline

diff --git a/rss2maildir.py b/rss2maildir.py
index ff7be81..c9a2cee 100755
--- a/rss2maildir.py
+++ b/rss2maildir.py
@@ -1,10 +1,26 @@
 #!/usr/bin/python
-# coding=utf8
+# coding=utf-8
+
+# rss2maildir.py - RSS feeds to Maildir 1 email per item
+# Copyright (C) 2007  Brett Parker <iDunno@sommitrealweird.co.uk>
+# 
+# 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 3 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, see <http://www.gnu.org/licenses/>.
 
-import mailbox
 import sys
 import os
 import stat
+import httplib
 import urllib
 
 import feedparser
@@ -15,6 +31,7 @@ from email.MIMEText import MIMEText
 import datetime
 import random
 import string
+import textwrap
 
 import socket
 
@@ -36,71 +53,278 @@ entities = {
     "pound": "£",
     "copy": "©",
     "apos": "'",
-    "quote": "\"",
+    "quot": "\"",
+    "nbsp": " ",
     }
 
 class HTML2Text(HTMLParser):
-    
+
     def __init__(self):
         self.inheadingone = False
         self.inheadingtwo = False
         self.inotherheading = False
+        self.inparagraph = True
+        self.inblockquote = False
         self.inlink = False
-        self.text = ""
-        self.headingtext = ""
+        self.text = u''
+        self.currentparagraph = u''
+        self.headingtext = u''
+        self.blockquote = u''
+        self.inpre = False
+        self.inul = False
+        self.initem = False
+        self.item = u''
         HTMLParser.__init__(self)
 
     def handle_starttag(self, tag, attrs):
         if tag.lower() == "h1":
             self.inheadingone = True
+            self.inparagraph = False
         elif tag.lower() == "h2":
             self.inheadingtwo = True
+            self.inparagraph = False
         elif tag.lower() in ["h3", "h4", "h5", "h6"]:
             self.inotherheading = True
+            self.inparagraph = False
         elif tag.lower() == "a":
             self.inlink = True
         elif tag.lower() == "br":
-            self.text = self.text + "\n"
+            self.handle_br()
+        elif tag.lower() == "blockquote":
+            self.inblockquote = True
+            self.text = self.text + u'\n'
         elif tag.lower() == "p":
             if self.text != "":
-                self.text = self.text + "\n\n"
+                self.text = self.text + u'\n\n'
+            if self.inparagraph:
+                self.text = self.text \
+                    + u'\n'.join(textwrap.wrap(self.currentparagraph, 70))
+            self.currentparagraph = u''
+            self.inparagraph = True
+        elif tag.lower() == "pre":
+            self.text = self.text + "\n"
+            self.inpre = True
+            self.inparagraph = False
+            self.inblockquote = False
+        elif tag.lower() == "ul":
+            self.item = u''
+            self.inul = True
+            self.text = self.text + "\n"
+        elif tag.lower() == "li" and self.inul:
+            if not self.initem:
+                self.initem = True
+                self.item = u''
+            else:
+                self.text = self.text \
+                    + u' * ' \
+                    + u'\n   '.join([a.strip() for a in \
+                        textwrap.wrap(self.item, 67)]) \
+                    + u'\n'
+                self.item = u''
 
     def handle_startendtag(self, tag, attrs):
         if tag.lower() == "br":
-            self.text = self.text + "\n"
+            self.handle_br()
+
+    def handle_br(self):
+            if self.inparagraph:
+                self.text = self.text \
+                + u'\n'.join( \
+                    [a \
+                        for a in textwrap.wrap( \
+                            self.currentparagraph, 70) \
+                    ] \
+                ) \
+                + u'\n'
+                self.currentparagraph = u''
+            elif self.inblockquote:
+                self.text = self.text \
+                    + u'\n> ' \
+                    + u'\n> '.join( \
+                        [a \
+                            for a in textwrap.wrap( \
+                                self.blockquote.encode("utf-8") \
+                                , 68) \
+                        ] \
+                    ) \
+                    + u'\n'
+                self.blockquote = u''
+            else:
+                self.text = self.text + "\n"
 
     def handle_endtag(self, tag):
         if tag.lower() == "h1":
             self.inheadingone = False
-            self.text = self.text + self.headingtext + "\n" + "=" * len(self.headingtext)
-            self.headingtext = ""
+            self.text = self.text \
+                + u'\n\n' \
+                + self.headingtext.encode("utf-8") \
+                + u'\n' \
+                + u'=' * len(self.headingtext.encode("utf-8").strip())
+            self.headingtext = u''
         elif tag.lower() == "h2":
             self.inheadingtwo = False
-            self.text = self.text + self.headingtext + "\n" + "-" * len(self.headingtext)
-            self.headingtext = ""
+            self.text = self.text \
+                + u'\n\n' \
+                + self.headingtext.encode("utf-8") \
+                + u'\n' \
+                + u'-' * len(self.headingtext.encode("utf-8").strip())
+            self.headingtext = u''
         elif tag.lower() in ["h3", "h4", "h5", "h6"]:
             self.inotherheading = False
-            self.text = self.text + self.headingtext + "\n" + "~" * len(self.headingtext)
-            self.headingtext = ""
+            self.text = self.text \
+                + u'\n\n' \
+                + self.headingtext.encode("utf-8") \
+                + u'\n' \
+                + u'~' * len(self.headingtext.encode("utf-8").strip())
+            self.headingtext = u''
+        elif tag.lower() == "p":
+            self.text = self.text \
+                + u'\n'.join(textwrap.wrap( \
+                    self.currentparagraph, 70) \
+                )
+            self.inparagraph = False
+            self.currentparagraph = u''
+        elif tag.lower() == "blockquote":
+            self.text = self.text \
+                + u'\n> ' \
+                + u'\n> '.join( \
+                    [a.strip() \
+                        for a in textwrap.wrap( \
+                            self.blockquote, 68)] \
+                    ) \
+                + u'\n'
+            self.inblockquote = False
+            self.blockquote = u''
+        elif tag.lower() == "pre":
+            self.inpre = False
+        elif tag.lower() == "li":
+            self.initem = False
+            if self.item != "":
+                self.text = self.text \
+                    + u' * ' \
+                    + u'\n   '.join( \
+                        [a.strip() for a in textwrap.wrap(self.item, 67)]) \
+                    + u'\n'
+            self.item = u''
+        elif tag.lower() == "ul":
+            self.inul = False
 
     def handle_data(self, data):
-        if not self.inheadingone and not self.inheadingtwo and not self.inotherheading:
-            self.text = self.text + data.strip() + " "
+        if self.inheadingone or self.inheadingtwo or self.inotherheading:
+            self.headingtext = self.headingtext \
+                + unicode(data, "utf-8").strip() \
+                + u' '
+        elif self.inblockquote:
+            self.blockquote = self.blockquote \
+                + unicode(data, "utf-8").strip() \
+                + u' '
+        elif self.inparagraph:
+            self.currentparagraph = self.currentparagraph \
+                + unicode(data, "utf-8").strip() \
+                + u' '
+        elif self.inul and self.initem:
+            self.item = self.item + unicode(data, "utf-8")
+        elif self.inpre:
+            self.text = self.text + unicode(data, "utf-8")
         else:
-            self.headingtext = self.headingtext + data.strip() + " "
+            self.text = self.text + unicode(data, "utf-8").strip() + u' '
 
     def handle_entityref(self, name):
+        entity = name
         if entities.has_key(name.lower()):
-            self.text = self.text + entities[name.lower()]
+            entity = entities[name.lower()]
+        elif name[0] == "#":
+            entity = unichr(int(name[1:]))
         else:
-            self.text = self.text + "&" + name + ";"
+            entity = "&" + name + ";"
+
+        if self.inparagraph:
+            self.currentparagraph = self.currentparagraph \
+                + unicode(entity, "utf-8")
+        elif self.inblockquote:
+            self.blockquote = self.blockquote + unicode(entity, "utf-8")
+        else:
+            self.text = self.text + unicode(entity, "utf-8")
 
     def gettext(self):
-        return self.text
+        data = self.text
+        if self.inparagraph:
+            data = data + "\n".join(textwrap.wrap(self.currentparagraph, 70))
+        return data
+
+def open_url(method, url):
+    redirectcount = 0
+    while redirectcount < 3:
+        (type, rest) = urllib.splittype(url)
+        (host, path) = urllib.splithost(rest)
+        (host, port) = urllib.splitport(host)
+        if port == None:
+            port = 80
+        try:
+            conn = httplib.HTTPConnection("%s:%s" %(host, port))
+            conn.request(method, path)
+            response = conn.getresponse()
+            if response.status in [301, 302, 303, 307]:
+                headers = response.getheaders()
+                for header in headers:
+                    if header[0] == "location":
+                        url = header[1]
+            elif response.status == 200:
+                return response
+        except:
+            pass
+        redirectcount = redirectcount + 1
+    return None
 
 def parse_and_deliver(maildir, url, statedir):
-    md = mailbox.Maildir(maildir)
-    fp = feedparser.parse(url)
+    feedhandle = None
+    headers = None
+    # first check if we know about this feed already
+    feeddb = dbm.open(os.path.join(statedir, "feeds"), "c")
+    if feeddb.has_key(url):
+        data = feeddb[url]
+        data = cgi.parse_qs(data)
+        response = open_url("HEAD", url)
+        headers = None
+        if response:
+            headers = response.getheaders()
+        ischanged = False
+        try:
+            for header in headers:
+                if header[0] == "content-length":
+                    if header[1] != data["content-length"][0]:
+                        ischanged = True
+                elif header[0] == "etag":
+                    if header[1] != data["etag"][0]:
+                        ischanged = True
+                elif header[0] == "last-modified":
+                    if header[1] != data["last-modified"][0]:
+                        ischanged = True
+                elif header[0] == "content-md5":
+                    if header[1] != data["content-md5"][0]:
+                        ischanged = True
+        except:
+            ischanged = True
+        if ischanged:
+            response = open_url("GET", url)
+            if response != None:
+                headers = response.getheaders()
+                feedhandle = response
+            else:
+                sys.stderr.write("Failed to fetch feed: %s\n" %(url))
+                return
+        else:
+            return # don't need to do anything, nothings changed.
+    else:
+        response = open_url("GET", url)
+        if response != None:
+            headers = response.getheaders()
+            feedhandle = response
+        else:
+            sys.stderr.write("Failed to fetch feed: %s\n" %(url))
+            return
+
+    fp = feedparser.parse(feedhandle)
     db = dbm.open(os.path.join(statedir, "seen"), "c")
     for item in fp["items"]:
         # have we seen it before?
@@ -111,11 +335,24 @@ def parse_and_deliver(maildir, url, statedir):
         else:
             content = item["summary"]
 
-        md5sum = md5.md5(content.encode("utf8")).hexdigest()
+        md5sum = md5.md5(content.encode("utf-8")).hexdigest()
+
+        prevmessageid = None
+
+        # check if there's a guid too - if that exists and we match the md5,
+        # return
+        if item.has_key("guid"):
+            if db.has_key(url + "|" + item["guid"]):
+                data = db[url + "|" + item["guid"]]
+                data = cgi.parse_qs(data)
+                if data["contentmd5"][0] == md5sum:
+                    continue
 
-        if db.has_key(item["link"]):
-            data = db[item["link"]]
+        if db.has_key(url + "|" + item["link"]):
+            data = db[url + "|" + item["link"]]
             data = cgi.parse_qs(data)
+            if data.has_key("message-id"):
+                prevmessageid = data["message-id"][0]
             if data["contentmd5"][0] == md5sum:
                 continue
 
@@ -126,27 +363,52 @@ def parse_and_deliver(maildir, url, statedir):
 
         # create a basic email message
         msg = MIMEMultipart("alternative")
-        messageid = "<" + datetime.datetime.now().strftime("%Y%m%d%H%M") + "." + "".join([random.choice(string.ascii_letters + string.digits) for a in range(0,6)]) + "@" + socket.gethostname() + ">"
+        messageid = "<" \
+            + datetime.datetime.now().strftime("%Y%m%d%H%M") \
+            + "." \
+            + "".join( \
+                [random.choice( \
+                    string.ascii_letters + string.digits \
+                    ) for a in range(0,6) \
+                ]) + "@" + socket.gethostname() + ">"
         msg.add_header("Message-ID", messageid)
         msg.set_unixfrom("\"%s\" <rss2maildir@localhost>" %(url))
         msg.add_header("From", "\"%s\" <rss2maildir@localhost>" %(author))
         msg.add_header("To", "\"%s\" <rss2maildir@localhost>" %(url))
-        createddate = datetime.datetime(*item["updated_parsed"][0:6]).strftime("%a, %e %b %Y %T -0000")
+        if prevmessageid:
+            msg.add_header("References", prevmessageid)
+        createddate = datetime.datetime.now() \
+            .strftime("%a, %e %b %Y %T -0000")
+        try:
+            createddate = datetime.datetime(*item["updated_parsed"][0:6]) \
+                .strftime("%a, %e %b %Y %T -0000")
+        except:
+            pass
         msg.add_header("Date", createddate)
         msg.add_header("Subject", item["title"])
         msg.set_default_type("text/plain")
 
-        htmlpart = MIMEText(content.encode("utf8"), "html", "utf8")
+        htmlpart = MIMEText(content.encode("utf-8"), "html", "utf-8")
         textparser = HTML2Text()
-        textparser.feed(content.encode("utf8"))
+        textparser.feed(content.encode("utf-8"))
         textcontent = textparser.gettext()
-        textpart = MIMEText(textcontent, "plain", "utf8")
+        textcontent = "%s\n\nItem URL: %s" %( \
+            textcontent, \
+            item["link"] )
+        textpart = MIMEText(textcontent.encode("utf-8"), "plain", "utf-8")
         msg.attach(textpart)
         msg.attach(htmlpart)
 
         # start by working out the filename we should be writting to, we do
         # this following the normal maildir style rules
-        fname = str(os.getpid()) + "." + socket.gethostname() + "." + "".join([random.choice(string.ascii_letters + string.digits) for a in range(0,10)]) + "." + datetime.datetime.now().strftime('%s')
+        fname = str(os.getpid()) \
+            + "." + socket.gethostname() \
+            + "." + "".join( \
+                [random.choice( \
+                    string.ascii_letters + string.digits \
+                    ) for a in range(0,10) \
+                ]) + "." \
+            + datetime.datetime.now().strftime('%s')
         fn = os.path.join(maildir, "tmp", fname)
         fh = open(fn, "w")
         fh.write(msg.as_string())
@@ -157,10 +419,45 @@ def parse_and_deliver(maildir, url, statedir):
         os.unlink(fn)
 
         # now add to the database about the item
-        data = urllib.urlencode((("message-id", messageid), ("created", createddate), ("contentmd5", md5sum)))
-        db[item["link"]] = data
+        if prevmessageid:
+            messageid = prevmessageid + " " + messageid
+        if item.has_key("guid") and item["guid"] != item["link"]:
+            data = urllib.urlencode(( \
+                ("message-id", messageid), \
+                ("created", createddate), \
+                ("contentmd5", md5sum) \
+                ))
+            db[url + "|" + item["guid"]] = data
+            try:
+                data = db[url + "|" + item["link"]]
+                data = cgi.parse_qs(data)
+                newdata = urllib.urlencode(( \
+                    ("message-id", messageid), \
+                    ("created", data["created"][0]), \
+                    ("contentmd5", data["contentmd5"][0]) \
+                    ))
+                db[url + "|" + item["link"]] = newdata
+            except:
+                db[url + "|" + item["link"]] = data
+        else:
+            data = urllib.urlencode(( \
+                ("message-id", messageid), \
+                ("created", createddate), \
+                ("contentmd5", md5sum) \
+                ))
+            db[url + "|" + item["link"]] = data
+
+    if headers:
+        data = []
+        for header in headers:
+            if header[0] in ["content-md5", "etag", "last-modified", "content-length"]:
+                data.append((header[0], header[1]))
+        if len(data) > 0:
+            data = urllib.urlencode(data)
+            feeddb[url] = data
 
     db.close()
+    feeddb.close()
 
 # first off, parse the command line arguments
 
@@ -187,7 +484,8 @@ if options.conf != None:
         configfile = options.conf
     except:
         # should exit here as the specified file doesn't exist
-        sys.stderr.write("Config file %s does not exist. Exiting.\n" %(options.conf,))
+        sys.stderr.write( \
+            "Config file %s does not exist. Exiting.\n" %(options.conf,))
         sys.exit(2)
 else:
     # check through the default locations
@@ -216,7 +514,8 @@ if options.statedir != None:
     try:
         mode = os.stat(state_dir)[stat.ST_MODE]
         if not stat.S_ISDIR(mode):
-            sys.stderr.write("State directory (%s) is not a directory\n" %(state_dir))
+            sys.stderr.write( \
+                "State directory (%s) is not a directory\n" %(state_dir))
             sys.exit(1)
     except:
         # try to make the directory
@@ -230,7 +529,8 @@ elif scp.has_option("general", "state_dir"):
     try:
         mode = os.stat(state_dir)[stat.ST_MODE]
         if not stat.S_ISDIR(mode):
-            sys.stderr.write("State directory (%s) is not a directory\n" %(state_dir))
+            sys.stderr.write( \
+                "State directory (%s) is not a directory\n" %(state_dir))
             sys.exit(1)
     except:
         # try to create it
@@ -238,19 +538,22 @@ elif scp.has_option("general", "state_dir"):
             os.mkdir(new_state_dir)
             state_dir = new_state_dir
         except:
-            sys.stderr.write("Couldn't create state directory %s\n" %(new_state_dir))
+            sys.stderr.write( \
+                "Couldn't create state directory %s\n" %(new_state_dir))
             sys.exit(1)
 else:
     try:
         mode = os.stat(state_dir)[stat.ST_MODE]
         if not stat.S_ISDIR(mode):
-            sys.stderr.write("State directory %s is not a directory\n" %(state_dir))
+            sys.stderr.write( \
+                "State directory %s is not a directory\n" %(state_dir))
             sys.exit(1)
     except:
         try:
             os.mkdir(state_dir)
         except:
-            sys.stderr.write("State directory %s could not be created\n" %(state_dir))
+            sys.stderr.write( \
+                "State directory %s could not be created\n" %(state_dir))
             sys.exit(1)
 
 if scp.has_option("general", "maildir_root"):
@@ -259,7 +562,9 @@ if scp.has_option("general", "maildir_root"):
 try:
     mode = os.stat(maildir_root)[stat.ST_MODE]
     if not stat.S_ISDIR(mode):
-        sys.stderr.write("Maildir Root %s is not a directory\n" %(maildir_root))
+        sys.stderr.write( \
+            "Maildir Root %s is not a directory\n" \
+            %(maildir_root))
         sys.exit(1)
 except:
     try:
@@ -320,7 +625,9 @@ for section in feeds:
             os.mkdir(os.path.join(maildir, "cur"))
             os.mkdir(os.path.join(maildir, "tmp"))
         except:
-            sys.stderr.write("Couldn't create required maildir directories for %s\n" %(section,))
+            sys.stderr.write( \
+                "Couldn't create required maildir directories for %s\n" \
+                %(section,))
             sys.exit(1)
 
     # right - we've got the directories, we've got the section, we know the