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547 lines
17 KiB
Python
547 lines
17 KiB
Python
# Support for the Atom, RSS, RDF, and CDF feed formats
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# Copyright 2010-2023 Kurt McKee <contactme@kurtmckee.org>
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# Copyright 2002-2008 Mark Pilgrim
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# All rights reserved.
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#
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# This file is a part of feedparser.
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#
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# Redistribution and use in source and binary forms, with or without modification,
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# are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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import copy
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from ..datetimes import _parse_date
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from ..urls import make_safe_absolute_uri
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from ..util import FeedParserDict
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class Namespace:
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"""Support for the Atom, RSS, RDF, and CDF feed formats.
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The feed formats all share common elements, some of which have conflicting
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interpretations. For simplicity, all of the base feed format support is
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collected here.
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"""
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supported_namespaces = {
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"": "",
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"http://backend.userland.com/rss": "",
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"http://blogs.law.harvard.edu/tech/rss": "",
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"http://purl.org/rss/1.0/": "",
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"http://my.netscape.com/rdf/simple/0.9/": "",
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"http://example.com/newformat#": "",
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"http://example.com/necho": "",
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"http://purl.org/echo/": "",
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"uri/of/echo/namespace#": "",
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"http://purl.org/pie/": "",
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"http://purl.org/atom/ns#": "",
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"http://www.w3.org/2005/Atom": "",
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"http://purl.org/rss/1.0/modules/rss091#": "",
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}
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def _start_rss(self, attrs_d):
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versionmap = {
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"0.91": "rss091u",
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"0.92": "rss092",
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"0.93": "rss093",
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"0.94": "rss094",
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}
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# If we're here then this is an RSS feed.
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# If we don't have a version or have a version that starts with something
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# other than RSS then there's been a mistake. Correct it.
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if not self.version or not self.version.startswith("rss"):
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attr_version = attrs_d.get("version", "")
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version = versionmap.get(attr_version)
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if version:
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self.version = version
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elif attr_version.startswith("2."):
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self.version = "rss20"
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else:
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self.version = "rss"
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def _start_channel(self, attrs_d):
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self.infeed = 1
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self._cdf_common(attrs_d)
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def _cdf_common(self, attrs_d):
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if "lastmod" in attrs_d:
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self._start_modified({})
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self.elementstack[-1][-1] = attrs_d["lastmod"]
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self._end_modified()
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if "href" in attrs_d:
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self._start_link({})
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self.elementstack[-1][-1] = attrs_d["href"]
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self._end_link()
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def _start_feed(self, attrs_d):
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self.infeed = 1
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versionmap = {"0.1": "atom01", "0.2": "atom02", "0.3": "atom03"}
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if not self.version:
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attr_version = attrs_d.get("version")
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version = versionmap.get(attr_version)
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if version:
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self.version = version
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else:
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self.version = "atom"
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def _end_channel(self):
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self.infeed = 0
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_end_feed = _end_channel
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def _start_image(self, attrs_d):
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context = self._get_context()
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if not self.inentry:
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context.setdefault("image", FeedParserDict())
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self.inimage = 1
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self.title_depth = -1
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self.push("image", 0)
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def _end_image(self):
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self.pop("image")
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self.inimage = 0
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def _start_textinput(self, attrs_d):
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context = self._get_context()
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context.setdefault("textinput", FeedParserDict())
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self.intextinput = 1
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self.title_depth = -1
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self.push("textinput", 0)
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_start_textInput = _start_textinput
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def _end_textinput(self):
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self.pop("textinput")
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self.intextinput = 0
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_end_textInput = _end_textinput
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def _start_author(self, attrs_d):
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self.inauthor = 1
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self.push("author", 1)
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# Append a new FeedParserDict when expecting an author
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context = self._get_context()
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context.setdefault("authors", [])
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context["authors"].append(FeedParserDict())
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_start_managingeditor = _start_author
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def _end_author(self):
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self.pop("author")
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self.inauthor = 0
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self._sync_author_detail()
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_end_managingeditor = _end_author
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def _start_contributor(self, attrs_d):
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self.incontributor = 1
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context = self._get_context()
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context.setdefault("contributors", [])
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context["contributors"].append(FeedParserDict())
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self.push("contributor", 0)
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def _end_contributor(self):
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self.pop("contributor")
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self.incontributor = 0
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def _start_name(self, attrs_d):
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self.push("name", 0)
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def _end_name(self):
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value = self.pop("name")
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if self.inpublisher:
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self._save_author("name", value, "publisher")
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elif self.inauthor:
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self._save_author("name", value)
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elif self.incontributor:
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self._save_contributor("name", value)
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elif self.intextinput:
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context = self._get_context()
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context["name"] = value
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def _start_width(self, attrs_d):
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self.push("width", 0)
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def _end_width(self):
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value = self.pop("width")
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try:
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value = int(value)
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except ValueError:
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value = 0
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if self.inimage:
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context = self._get_context()
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context["width"] = value
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def _start_height(self, attrs_d):
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self.push("height", 0)
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def _end_height(self):
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value = self.pop("height")
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try:
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value = int(value)
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except ValueError:
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value = 0
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if self.inimage:
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context = self._get_context()
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context["height"] = value
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def _start_url(self, attrs_d):
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self.push("href", 1)
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_start_homepage = _start_url
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_start_uri = _start_url
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def _end_url(self):
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value = self.pop("href")
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if self.inauthor:
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self._save_author("href", value)
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elif self.incontributor:
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self._save_contributor("href", value)
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_end_homepage = _end_url
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_end_uri = _end_url
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def _start_email(self, attrs_d):
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self.push("email", 0)
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def _end_email(self):
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value = self.pop("email")
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if self.inpublisher:
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self._save_author("email", value, "publisher")
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elif self.inauthor:
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self._save_author("email", value)
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elif self.incontributor:
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self._save_contributor("email", value)
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def _start_subtitle(self, attrs_d):
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self.push_content("subtitle", attrs_d, "text/plain", 1)
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_start_tagline = _start_subtitle
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def _end_subtitle(self):
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self.pop_content("subtitle")
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_end_tagline = _end_subtitle
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def _start_rights(self, attrs_d):
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self.push_content("rights", attrs_d, "text/plain", 1)
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_start_copyright = _start_rights
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def _end_rights(self):
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self.pop_content("rights")
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_end_copyright = _end_rights
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def _start_item(self, attrs_d):
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self.entries.append(FeedParserDict())
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self.push("item", 0)
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self.inentry = 1
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self.guidislink = 0
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self.title_depth = -1
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id = self._get_attribute(attrs_d, "rdf:about")
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if id:
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context = self._get_context()
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context["id"] = id
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self._cdf_common(attrs_d)
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_start_entry = _start_item
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def _end_item(self):
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self.pop("item")
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self.inentry = 0
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self.hasContent = 0
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_end_entry = _end_item
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def _start_language(self, attrs_d):
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self.push("language", 1)
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def _end_language(self):
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self.lang = self.pop("language")
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def _start_webmaster(self, attrs_d):
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self.push("publisher", 1)
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def _end_webmaster(self):
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self.pop("publisher")
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self._sync_author_detail("publisher")
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def _start_published(self, attrs_d):
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self.push("published", 1)
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_start_issued = _start_published
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_start_pubdate = _start_published
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def _end_published(self):
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value = self.pop("published")
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self._save("published_parsed", _parse_date(value), overwrite=True)
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_end_issued = _end_published
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_end_pubdate = _end_published
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def _start_updated(self, attrs_d):
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self.push("updated", 1)
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_start_modified = _start_updated
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_start_lastbuilddate = _start_updated
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def _end_updated(self):
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value = self.pop("updated")
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parsed_value = _parse_date(value)
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self._save("updated_parsed", parsed_value, overwrite=True)
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_end_modified = _end_updated
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_end_lastbuilddate = _end_updated
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def _start_created(self, attrs_d):
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self.push("created", 1)
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def _end_created(self):
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value = self.pop("created")
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self._save("created_parsed", _parse_date(value), overwrite=True)
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def _start_expirationdate(self, attrs_d):
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self.push("expired", 1)
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def _end_expirationdate(self):
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self._save("expired_parsed", _parse_date(self.pop("expired")), overwrite=True)
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def _start_category(self, attrs_d):
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term = attrs_d.get("term")
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scheme = attrs_d.get("scheme", attrs_d.get("domain"))
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label = attrs_d.get("label")
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self._add_tag(term, scheme, label)
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self.push("category", 1)
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_start_keywords = _start_category
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def _end_category(self):
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value = self.pop("category")
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if not value:
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return
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context = self._get_context()
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tags = context["tags"]
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if value and len(tags) and not tags[-1]["term"]:
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tags[-1]["term"] = value
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else:
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self._add_tag(value, None, None)
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_end_keywords = _end_category
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def _start_cloud(self, attrs_d):
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self._get_context()["cloud"] = FeedParserDict(attrs_d)
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def _start_link(self, attrs_d):
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attrs_d.setdefault("rel", "alternate")
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if attrs_d["rel"] == "self":
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attrs_d.setdefault("type", "application/atom+xml")
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else:
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attrs_d.setdefault("type", "text/html")
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context = self._get_context()
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attrs_d = self._enforce_href(attrs_d)
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if "href" in attrs_d:
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attrs_d["href"] = self.resolve_uri(attrs_d["href"])
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if (
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attrs_d.get("rel") == "alternate"
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and self.map_content_type(attrs_d.get("type")) in self.html_types
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):
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self.isentrylink = 1
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expecting_text = self.infeed or self.inentry or self.insource
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context.setdefault("links", [])
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if not (self.inentry and self.inimage):
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context["links"].append(FeedParserDict(attrs_d))
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if "href" in attrs_d:
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if self.isentrylink:
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context["link"] = attrs_d["href"]
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else:
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self.push("link", expecting_text)
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def _end_link(self):
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self.pop("link")
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self.isentrylink = 0
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def _start_guid(self, attrs_d):
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self.guidislink = attrs_d.get("ispermalink", "true") == "true"
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self.push("id", 1)
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_start_id = _start_guid
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def _end_guid(self):
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value = self.pop("id")
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self._save("guidislink", self.guidislink and "link" not in self._get_context())
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if self.guidislink:
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# guid acts as link, but only if 'ispermalink' is not present or is 'true',
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# and only if the item doesn't already have a link element
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self._save("link", value)
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_end_id = _end_guid
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def _start_title(self, attrs_d):
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if self.svgOK:
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return self.unknown_starttag("title", list(attrs_d.items()))
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self.push_content(
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"title", attrs_d, "text/plain", self.infeed or self.inentry or self.insource
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)
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def _end_title(self):
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if self.svgOK:
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return
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value = self.pop_content("title")
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if not value:
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return
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self.title_depth = self.depth
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def _start_description(self, attrs_d):
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context = self._get_context()
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if "summary" in context and not self.hasContent:
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self._summaryKey = "content"
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self._start_content(attrs_d)
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else:
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self.push_content(
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"description",
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attrs_d,
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"text/html",
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self.infeed or self.inentry or self.insource,
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)
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def _start_abstract(self, attrs_d):
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self.push_content(
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"description",
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attrs_d,
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"text/plain",
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self.infeed or self.inentry or self.insource,
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)
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def _end_description(self):
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if self._summaryKey == "content":
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self._end_content()
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else:
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self.pop_content("description")
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self._summaryKey = None
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_end_abstract = _end_description
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def _start_info(self, attrs_d):
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self.push_content("info", attrs_d, "text/plain", 1)
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_start_feedburner_browserfriendly = _start_info
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def _end_info(self):
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self.pop_content("info")
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_end_feedburner_browserfriendly = _end_info
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def _start_generator(self, attrs_d):
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if attrs_d:
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attrs_d = self._enforce_href(attrs_d)
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if "href" in attrs_d:
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attrs_d["href"] = self.resolve_uri(attrs_d["href"])
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self._get_context()["generator_detail"] = FeedParserDict(attrs_d)
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self.push("generator", 1)
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def _end_generator(self):
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value = self.pop("generator")
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context = self._get_context()
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if "generator_detail" in context:
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context["generator_detail"]["name"] = value
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def _start_summary(self, attrs_d):
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context = self._get_context()
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if "summary" in context and not self.hasContent:
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self._summaryKey = "content"
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self._start_content(attrs_d)
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else:
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self._summaryKey = "summary"
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self.push_content(self._summaryKey, attrs_d, "text/plain", 1)
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def _end_summary(self):
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if self._summaryKey == "content":
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self._end_content()
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else:
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self.pop_content(self._summaryKey or "summary")
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self._summaryKey = None
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def _start_enclosure(self, attrs_d):
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attrs_d = self._enforce_href(attrs_d)
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context = self._get_context()
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attrs_d["rel"] = "enclosure"
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context.setdefault("links", []).append(FeedParserDict(attrs_d))
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def _start_source(self, attrs_d):
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if "url" in attrs_d:
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# This means that we're processing a source element from an RSS 2.0 feed
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self.sourcedata["href"] = attrs_d["url"]
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self.push("source", 1)
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self.insource = 1
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self.title_depth = -1
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def _end_source(self):
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self.insource = 0
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value = self.pop("source")
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if value:
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self.sourcedata["title"] = value
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self._get_context()["source"] = copy.deepcopy(self.sourcedata)
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self.sourcedata.clear()
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def _start_content(self, attrs_d):
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self.hasContent = 1
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self.push_content("content", attrs_d, "text/plain", 1)
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src = attrs_d.get("src")
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if src:
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self.contentparams["src"] = src
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self.push("content", 1)
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def _start_body(self, attrs_d):
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self.push_content("content", attrs_d, "application/xhtml+xml", 1)
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_start_xhtml_body = _start_body
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def _start_content_encoded(self, attrs_d):
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|
self.hasContent = 1
|
|
self.push_content("content", attrs_d, "text/html", 1)
|
|
|
|
_start_fullitem = _start_content_encoded
|
|
|
|
def _end_content(self):
|
|
copyToSummary = self.map_content_type(self.contentparams.get("type")) in (
|
|
{"text/plain"} | self.html_types
|
|
)
|
|
value = self.pop_content("content")
|
|
if copyToSummary:
|
|
self._save("summary", value)
|
|
|
|
_end_body = _end_content
|
|
_end_xhtml_body = _end_content
|
|
_end_content_encoded = _end_content
|
|
_end_fullitem = _end_content
|
|
|
|
def _start_newlocation(self, attrs_d):
|
|
self.push("newlocation", 1)
|
|
|
|
def _end_newlocation(self):
|
|
url = self.pop("newlocation")
|
|
context = self._get_context()
|
|
# don't set newlocation if the context isn't right
|
|
if context is not self.feeddata:
|
|
return
|
|
context["newlocation"] = make_safe_absolute_uri(self.baseuri, url.strip())
|