Created new parser, HtmlParser, based on the stdlib HTMLParser module.
Added AutoSelectParser, picks LxmlParser if lxml is available, falls back to HtmlParser if not, also the new default. Created a special BeautifulSoupTest in order to still test this parser. Updated README, installation and settings docs to reflect these changes.
This commit is contained in:
@@ -29,9 +29,10 @@ Configurability & Extendibility
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-------------------------------
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-------------------------------
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Django Compressor is highly configurable and extendible. The HTML parsing
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Django Compressor is highly configurable and extendible. The HTML parsing
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is done using BeautifulSoup_ by default. As an alternative Django Compressor
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is done using lxml_ or if it's not available Python's built-in HTMLParser by
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provides an lxml_ and a html5lib_ based parser, as well as an abstract base
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default. As an alternative Django Compressor provides a BeautifulSoup_ and a
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class that makes it easy to write a custom parser.
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html5lib_ based parser, as well as an abstract base class that makes it easy to
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write a custom parser.
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Django Compressor also comes with built-in support for `CSS Tidy`_,
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Django Compressor also comes with built-in support for `CSS Tidy`_,
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`YUI CSS and JS`_ compressor, the Google's `Closure Compiler`_, a Python
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`YUI CSS and JS`_ compressor, the Google's `Closure Compiler`_, a Python
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@@ -88,8 +88,6 @@ class Compressor(object):
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def hunks(self):
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def hunks(self):
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for kind, value, elem in self.split_contents():
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for kind, value, elem in self.split_contents():
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if kind == "hunk":
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if kind == "hunk":
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# Let's cast BeautifulSoup element to unicode here since
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# it will try to encode using ascii internally later
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yield unicode(self.filter(
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yield unicode(self.filter(
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value, method="input", elem=elem, kind=kind))
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value, method="input", elem=elem, kind=kind))
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elif kind == "file":
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elif kind == "file":
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@@ -1,5 +1,31 @@
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from django.utils.functional import LazyObject
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from django.utils.importlib import import_module
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# support legacy parser module usage
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# support legacy parser module usage
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from compressor.parser.base import ParserBase
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from compressor.parser.base import ParserBase
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from compressor.parser.beautifulsoup import BeautifulSoupParser
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from compressor.parser.lxml import LxmlParser
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from compressor.parser.lxml import LxmlParser
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from compressor.parser.htmlparser import HtmlParser
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from compressor.parser.beautifulsoup import BeautifulSoupParser
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from compressor.parser.html5lib import Html5LibParser
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from compressor.parser.html5lib import Html5LibParser
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class AutoSelectParser(LazyObject):
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options = (
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('lxml.html', LxmlParser), # lxml, extremely fast
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('HTMLParser', HtmlParser), # fast and part of the Python stdlib
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)
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def __init__(self, content):
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self._wrapped = None
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self._setup(content)
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def __getattr__(self, name):
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return getattr(self._wrapped, name)
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def _setup(self, content):
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for dependency, parser in self.options:
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try:
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import_module(dependency)
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self._wrapped = parser(content)
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break
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except ImportError:
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continue
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@@ -47,4 +47,7 @@ class Html5LibParser(ParserBase):
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return elem.name
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return elem.name
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def elem_str(self, elem):
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def elem_str(self, elem):
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# This method serializes HTML in a way that does not pass all tests.
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# However, this method is only called in tests anyway, so it doesn't
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# really matter.
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return smart_unicode(self._serialize(elem))
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return smart_unicode(self._serialize(elem))
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77
compressor/parser/htmlparser.py
Normal file
77
compressor/parser/htmlparser.py
Normal file
@@ -0,0 +1,77 @@
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from HTMLParser import HTMLParser
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from django.utils.encoding import smart_unicode
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from django.utils.datastructures import SortedDict
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from compressor.exceptions import ParserError
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from compressor.parser import ParserBase
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class HtmlParser(ParserBase, HTMLParser):
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def __init__(self, content):
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HTMLParser.__init__(self)
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self.content = content
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self._css_elems = []
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self._js_elems = []
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self._current_tag = None
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try:
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self.feed(self.content)
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self.close()
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except Exception, err:
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raise ParserError("Error while initializing HtmlParser: %s" % err)
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def handle_starttag(self, tag, attrs):
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tag = tag.lower()
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if tag in ('style', 'script'):
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if tag == 'style':
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tags = self._css_elems
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elif tag == 'script':
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tags = self._js_elems
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tags.append({
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'tag': tag,
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'attrs': attrs,
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'attrs_dict': dict(attrs),
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'text': ''
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})
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self._current_tag = tag
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elif tag == 'link':
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self._css_elems.append({
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'tag': tag,
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'attrs': attrs,
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'attrs_dict': dict(attrs),
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'text': None
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})
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def handle_endtag(self, tag):
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if self._current_tag and self._current_tag == tag.lower():
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self._current_tag = None
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def handle_data(self, data):
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if self._current_tag == 'style':
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self._css_elems[-1]['text'] = data
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elif self._current_tag == 'script':
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self._js_elems[-1]['text'] = data
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def css_elems(self):
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return self._css_elems
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def js_elems(self):
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return self._js_elems
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def elem_name(self, elem):
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return elem['tag']
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def elem_attribs(self, elem):
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return elem['attrs_dict']
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def elem_content(self, elem):
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return smart_unicode(elem['text'])
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def elem_str(self, elem):
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tag = {}
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tag.update(elem)
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tag['attrs'] = ''
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if len(elem['attrs']):
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tag['attrs'] = ' %s' % ' '.join(['%s="%s"' % (name, value) for name, value in elem['attrs']])
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if elem['tag'] == 'link':
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return '<%(tag)s%(attrs)s />' % tag
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else:
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return '<%(tag)s%(attrs)s>%(text)s</%(tag)s>' % tag
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@@ -15,6 +15,7 @@ class LxmlParser(ParserBase):
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try:
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try:
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from lxml.html import fromstring, soupparser
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from lxml.html import fromstring, soupparser
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from lxml.etree import tostring
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from lxml.etree import tostring
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self.tostring = tostring
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tree = fromstring(content)
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tree = fromstring(content)
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try:
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try:
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ignore = tostring(tree, encoding=unicode)
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ignore = tostring(tree, encoding=unicode)
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@@ -43,6 +44,9 @@ class LxmlParser(ParserBase):
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return elem.tag
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return elem.tag
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def elem_str(self, elem):
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def elem_str(self, elem):
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from lxml import etree
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elem_as_string = smart_unicode(
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return smart_unicode(
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self.tostring(elem, method='html', encoding=unicode))
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etree.tostring(elem, method='html', encoding=unicode))
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if elem.tag == 'link':
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# This makes testcases happy
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return elem_as_string.replace('>', ' />')
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return elem_as_string
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@@ -12,7 +12,7 @@ class CompressorSettings(AppSettings):
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# GET variable that disables compressor e.g. "nocompress"
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# GET variable that disables compressor e.g. "nocompress"
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DEBUG_TOGGLE = "None"
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DEBUG_TOGGLE = "None"
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# the backend to use when parsing the JavaScript or Stylesheet files
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# the backend to use when parsing the JavaScript or Stylesheet files
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PARSER = 'compressor.parser.BeautifulSoupParser'
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PARSER = 'compressor.parser.AutoSelectParser'
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OUTPUT_DIR = 'CACHE'
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OUTPUT_DIR = 'CACHE'
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STORAGE = 'compressor.storage.CompressorFileStorage'
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STORAGE = 'compressor.storage.CompressorFileStorage'
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@@ -15,6 +15,11 @@ try:
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except ImportError:
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except ImportError:
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html5lib = None
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html5lib = None
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try:
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from BeautifulSoup import BeautifulSoup
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except ImportError:
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BeautifulSoup = None
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from django.core.cache.backends import dummy
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from django.core.cache.backends import dummy
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from django.core.files.storage import get_storage_class
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from django.core.files.storage import get_storage_class
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from django.template import Template, Context, TemplateSyntaxError
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from django.template import Template, Context, TemplateSyntaxError
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@@ -31,6 +36,7 @@ from compressor.utils import find_command
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class CompressorTestCase(TestCase):
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class CompressorTestCase(TestCase):
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def setUp(self):
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def setUp(self):
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self.maxDiff = None
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settings.COMPRESS_ENABLED = True
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settings.COMPRESS_ENABLED = True
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settings.COMPRESS_PRECOMPILERS = {}
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settings.COMPRESS_PRECOMPILERS = {}
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settings.COMPRESS_DEBUG_TOGGLE = 'nocompress'
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settings.COMPRESS_DEBUG_TOGGLE = 'nocompress'
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@@ -136,29 +142,25 @@ class CompressorTestCase(TestCase):
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finally:
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finally:
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settings.COMPRESS_OUTPUT_DIR = old_output_dir
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settings.COMPRESS_OUTPUT_DIR = old_output_dir
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class LxmlCompressorTestCase(CompressorTestCase):
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def test_css_split(self):
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class ParserTestCase(object):
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out = [
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('file', os.path.join(settings.COMPRESS_ROOT, u'css/one.css'), u'<link rel="stylesheet" href="/media/css/one.css" type="text/css" charset="utf-8">'),
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('hunk', u'p { border:5px solid green;}', u'<style type="text/css">p { border:5px solid green;}</style>'),
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('file', os.path.join(settings.COMPRESS_ROOT, u'css/two.css'), u'<link rel="stylesheet" href="/media/css/two.css" type="text/css" charset="utf-8">'),
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]
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split = self.css_node.split_contents()
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split = [(x[0], x[1], self.css_node.parser.elem_str(x[2])) for x in split]
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self.assertEqual(out, split)
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def setUp(self):
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def setUp(self):
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self.old_parser = settings.COMPRESS_PARSER
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self.old_parser = settings.COMPRESS_PARSER
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settings.COMPRESS_PARSER = 'compressor.parser.LxmlParser'
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settings.COMPRESS_PARSER = self.parser_cls
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super(LxmlCompressorTestCase, self).setUp()
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super(ParserTestCase, self).setUp()
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def tearDown(self):
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def tearDown(self):
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settings.COMPRESS_PARSER = self.old_parser
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settings.COMPRESS_PARSER = self.old_parser
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LxmlCompressorTestCase = skipIf(lxml is None, 'lxml not found')(LxmlCompressorTestCase)
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class Html5LibCompressorTesCase(CompressorTestCase):
|
class LxmlParserTests(ParserTestCase, CompressorTestCase):
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parser_cls = 'compressor.parser.LxmlParser'
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LxmlParserTests = skipIf(lxml is None, 'lxml not found')(LxmlParserTests)
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class Html5LibParserTests(ParserTestCase, CompressorTestCase):
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|
parser_cls = 'compressor.parser.Html5LibParser'
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|
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def test_css_split(self):
|
def test_css_split(self):
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out = [
|
out = [
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@@ -178,14 +180,19 @@ class Html5LibCompressorTesCase(CompressorTestCase):
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split = [(x[0], x[1], self.js_node.parser.elem_str(x[2])) for x in split]
|
split = [(x[0], x[1], self.js_node.parser.elem_str(x[2])) for x in split]
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self.assertEqual(out, split)
|
self.assertEqual(out, split)
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|
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def setUp(self):
|
Html5LibParserTests = skipIf(
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self.old_parser = settings.COMPRESS_PARSER
|
html5lib is None, 'html5lib not found')(Html5LibParserTests)
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settings.COMPRESS_PARSER = 'compressor.parser.Html5LibParser'
|
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super(Html5LibCompressorTesCase, self).setUp()
|
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|
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def tearDown(self):
|
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settings.COMPRESS_PARSER = self.old_parser
|
class BeautifulSoupParserTests(ParserTestCase, CompressorTestCase):
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Html5LibCompressorTesCase = skipIf(html5lib is None, 'html5lib not found')(Html5LibCompressorTesCase)
|
parser_cls = 'compressor.parser.BeautifulSoupParser'
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|
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|
BeautifulSoupParserTests = skipIf(
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|
BeautifulSoup is None, 'BeautifulSoup not found')(BeautifulSoupParserTests)
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|
|
||||||
|
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|
class HtmlParserTests(ParserTestCase, CompressorTestCase):
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|
parser_cls = 'compressor.parser.HtmlParser'
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|
|
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|
|
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class CssAbsolutizingTestCase(TestCase):
|
class CssAbsolutizingTestCase(TestCase):
|
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|
@@ -35,10 +35,10 @@ Installation
|
|||||||
Dependencies
|
Dependencies
|
||||||
------------
|
------------
|
||||||
|
|
||||||
BeautifulSoup_
|
BeautifulSoup_ (optional)
|
||||||
^^^^^^^^^^^^^^
|
^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
for the default :ref:`parser <compress_parser>`
|
for the :ref:`parser <compress_parser>`
|
||||||
``compressor.parser.BeautifulSoupParser``::
|
``compressor.parser.BeautifulSoupParser``::
|
||||||
|
|
||||||
pip install BeautifulSoup
|
pip install BeautifulSoup
|
||||||
@@ -46,16 +46,15 @@ for the default :ref:`parser <compress_parser>`
|
|||||||
lxml_ (optional)
|
lxml_ (optional)
|
||||||
^^^^^^^^^^^^^^^^
|
^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
for the optional :ref:`parser <compress_parser>`
|
for the :ref:`parser <compress_parser>` ``compressor.parser.LxmlParser``,
|
||||||
``compressor.parser.LxmlParser``, also requires libxml2_::
|
also requires libxml2_::
|
||||||
|
|
||||||
STATIC_DEPS=true pip install lxml
|
STATIC_DEPS=true pip install lxml
|
||||||
|
|
||||||
html5lib_ (optional)
|
html5lib_ (optional)
|
||||||
^^^^^^^^^^^^^^^^^^^^
|
^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
for the optional :ref:`parser <compress_parser>`
|
for the :ref:`parser <compress_parser>` ``compressor.parser.Html5LibParser``::
|
||||||
``compressor.parser.Html5LibParser``::
|
|
||||||
|
|
||||||
pip install html5lib
|
pip install html5lib
|
||||||
|
|
||||||
@@ -63,10 +62,3 @@ for the optional :ref:`parser <compress_parser>`
|
|||||||
.. _lxml: http://codespeak.net/lxml/
|
.. _lxml: http://codespeak.net/lxml/
|
||||||
.. _libxml2: http://xmlsoft.org/
|
.. _libxml2: http://xmlsoft.org/
|
||||||
.. _html5lib: http://code.google.com/p/html5lib/
|
.. _html5lib: http://code.google.com/p/html5lib/
|
||||||
|
|
||||||
Deprecation
|
|
||||||
-----------
|
|
||||||
|
|
||||||
This section lists features and settings that are deprecated or removed
|
|
||||||
in newer versions of Django Compressor.
|
|
||||||
|
|
||||||
|
@@ -164,13 +164,25 @@ Django Compressor ships with one additional storage backend:
|
|||||||
COMPRESS_PARSER
|
COMPRESS_PARSER
|
||||||
^^^^^^^^^^^^^^^
|
^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
:Default: ``'compressor.parser.BeautifulSoupParser'``
|
:Default: ``'compressor.parser.AutoSelectParser'``
|
||||||
|
|
||||||
|
The backend to use when parsing the JavaScript or Stylesheet files. The
|
||||||
|
``AutoSelectParser`` picks the ``lxml`` based parser when available, and falls
|
||||||
|
back to ``HtmlParser`` if ``lxml`` is not available.
|
||||||
|
|
||||||
|
``LxmlParser`` is the fastest available parser, but ``HtmlParser`` is not much
|
||||||
|
slower. ``AutoSelectParser`` adds a slight overhead, but in most cases it
|
||||||
|
won't be necesarry to change the default parser.
|
||||||
|
|
||||||
|
The other two included parsers are considerably slower and should only be
|
||||||
|
used if absolutely necessary.
|
||||||
|
|
||||||
The backend to use when parsing the JavaScript or Stylesheet files.
|
|
||||||
The backends included in Django Compressor:
|
The backends included in Django Compressor:
|
||||||
|
|
||||||
- ``compressor.parser.BeautifulSoupParser``
|
- ``compressor.parser.AutoSelectParser``
|
||||||
- ``compressor.parser.LxmlParser``
|
- ``compressor.parser.LxmlParser``
|
||||||
|
- ``compressor.parser.HtmlParser``
|
||||||
|
- ``compressor.parser.BeautifulSoupParser``
|
||||||
- ``compressor.parser.Html5LibParser``
|
- ``compressor.parser.Html5LibParser``
|
||||||
|
|
||||||
See :ref:`dependencies` for more info about the packages you need
|
See :ref:`dependencies` for more info about the packages you need
|
||||||
|
3
setup.py
3
setup.py
@@ -111,9 +111,6 @@ setup(
|
|||||||
author_email = 'jannis@leidel.info',
|
author_email = 'jannis@leidel.info',
|
||||||
packages = find_packages(),
|
packages = find_packages(),
|
||||||
package_data = find_package_data('compressor', only_in_packages=False),
|
package_data = find_package_data('compressor', only_in_packages=False),
|
||||||
install_requires = [
|
|
||||||
'BeautifulSoup',
|
|
||||||
],
|
|
||||||
classifiers = [
|
classifiers = [
|
||||||
'Development Status :: 4 - Beta',
|
'Development Status :: 4 - Beta',
|
||||||
'Framework :: Django',
|
'Framework :: Django',
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||||||
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Reference in New Issue
Block a user