parse.py

#!/usr/bin/env python
"""usage: %prog [options] filename

Parse a document to a simpletree tree, with optional profiling
"""
#RELEASE move ./examples/

import sys
import os
from optparse import OptionParser

#RELEASE remove
sys.path.insert(0,os.path.abspath(os.path.join(__file__,'../src')))
#END RELEASE
from html5lib import html5parser, liberalxmlparser, sanitizer
from html5lib.tokenizer import HTMLTokenizer
from html5lib import treebuilders, serializer, treewalkers
from html5lib import constants

def parse():
    optParser = getOptParser()
    opts,args = optParser.parse_args()
    encoding = None

    try:
        f = args[-1]
        # Try opening from the internet
        if f.startswith('http://'):
            try:
                import urllib, cgi
                f = urllib.urlopen(f)
                contentType = f.headers.get('content-type')
                if contentType:
                    (mediaType, params) = cgi.parse_header(contentType)
                    encoding = params.get('charset')
            except: pass
        elif f == '-':
            f = sys.stdin
        else:
            try:
                # Try opening from file system
                f = open(f)
            except IOError: pass
    except IndexError:
        sys.stderr.write("No filename provided. Use -h for help\n")
        sys.exit(1)

    treebuilder = treebuilders.getTreeBuilder(opts.treebuilder)

    if opts.sanitize:
        tokenizer = sanitizer.HTMLSanitizer
    else:
        tokenizer = HTMLTokenizer

    if opts.liberalxml:
        p = liberalxmlparser.XHTMLParser(tree=treebuilder, tokenizer=tokenizer)
    else:
        p = html5parser.HTMLParser(tree=treebuilder, tokenizer=tokenizer)

    if opts.fragment:
        parseMethod = p.parseFragment
    else:
        parseMethod = p.parse

    if opts.profile:
        #XXX should import cProfile instead and use that
        import hotshot
        import hotshot.stats
        prof = hotshot.Profile('stats.prof')
        prof.runcall(parseMethod, f, encoding=encoding)
        prof.close()
        # XXX - We should use a temp file here
        stats = hotshot.stats.load('stats.prof')
        stats.strip_dirs()
        stats.sort_stats('time')
        stats.print_stats()
    elif opts.time:
        import time
        t0 = time.time()
        document = parseMethod(f, encoding=encoding)
        t1 = time.time()
        printOutput(p, document, opts)
        t2 = time.time()
        print "\n\nRun took: %fs (plus %fs to print the output)"%(t1-t0, t2-t1)
    else:
        document = parseMethod(f, encoding=encoding)
        printOutput(p, document, opts)

def printOutput(parser, document, opts):
    if opts.encoding:
        print "Encoding:", parser.tokenizer.stream.charEncoding
    if opts.xml:
        sys.stdout.write(document.toxml("utf-8"))
    elif opts.tree:
        if not hasattr(document,'__getitem__'): document = [document]
        for fragment in document:
            print parser.tree.testSerializer(fragment).encode("utf-8")
    elif opts.hilite:
        sys.stdout.write(document.hilite("utf-8"))
    elif opts.html:
        kwargs = {}
        for opt in serializer.HTMLSerializer.options:
            kwargs[opt] = getattr(opts,opt)
        if not kwargs['quote_char']: del kwargs['quote_char']
        tokens = treewalkers.getTreeWalker(opts.treebuilder)(document)
        for text in serializer.HTMLSerializer(**kwargs).serialize(tokens, encoding='utf-8'):
            sys.stdout.write(text)
        if not text.endswith('\n'): sys.stdout.write('\n')
    if opts.error:
        errList=[]
        for pos, errorcode, datavars in parser.errors:
            errList.append("Line %i Col %i"%pos + " " + constants.E.get(errorcode, 'Unknown error "%s"' % errorcode) % datavars)
        sys.stdout.write("\nParse errors:\n" + "\n".join(errList)+"\n")

def getOptParser():
    parser = OptionParser(usage=__doc__)

    parser.add_option("-p", "--profile", action="store_true", default=False,
                      dest="profile", help="Use the hotshot profiler to "
                      "produce a detailed log of the run")
    
    parser.add_option("-t", "--time",
                      action="store_true", default=False, dest="time",
                      help="Time the run using time.time (may not be accurate on all platforms, especially for short runs)")
    
    parser.add_option("-b", "--treebuilder", action="store", type="string",
                      dest="treebuilder", default="simpleTree")

    parser.add_option("-e", "--error", action="store_true", default=False,
                      dest="error", help="Print a list of parse errors")

    parser.add_option("-f", "--fragment", action="store_true", default=False,
                      dest="fragment", help="Parse as a fragment")

    parser.add_option("", "--tree", action="store_true", default=False,
                      dest="tree", help="Output as debug tree")
    
    parser.add_option("-x", "--xml", action="store_true", default=False,
                      dest="xml", help="Output as xml")
    
    parser.add_option("", "--no-html", action="store_false", default=True,
                      dest="html", help="Don't output html")
    
    parser.add_option("", "--hilite", action="store_true", default=False,
                      dest="hilite", help="Output as formatted highlighted code.")
    
    parser.add_option("-c", "--encoding", action="store_true", default=False,
                      dest="encoding", help="Print character encoding used")

    parser.add_option("", "--inject-meta-charset", action="store_true",
                      default=False, dest="inject_meta_charset",
                      help="inject <meta charset>")

    parser.add_option("", "--strip-whitespace", action="store_true",
                      default=False, dest="strip_whitespace",
                      help="strip whitespace")

    parser.add_option("", "--omit-optional-tags", action="store_true",
                      default=False, dest="omit_optional_tags",
                      help="omit optional tags")

    parser.add_option("", "--quote-attr-values", action="store_true",
                      default=False, dest="quote_attr_values",
                      help="quote attribute values")

    parser.add_option("", "--use-best-quote-char", action="store_true",
                      default=False, dest="use_best_quote_char",
                      help="use best quote character")

    parser.add_option("", "--quote-char", action="store",
                      default=None, dest="quote_char",
                      help="quote character")

    parser.add_option("", "--no-minimize-boolean-attributes",
                      action="store_false", default=True,
                      dest="minimize_boolean_attributes",
                      help="minimize boolean attributes")

    parser.add_option("", "--use-trailing-solidus", action="store_true",
                      default=False, dest="use_trailing_solidus",
                      help="use trailing solidus")

    parser.add_option("", "--space-before-trailing-solidus",
                      action="store_true", default=False,
                      dest="space_before_trailing_solidus",
                      help="add space before trailing solidus")

    parser.add_option("", "--escape-lt-in-attrs", action="store_true",
                      default=False, dest="escape_lt_in_attrs",
                      help="escape less than signs in attribute values")

    parser.add_option("", "--escape-rcdata", action="store_true",
                      default=False, dest="escape_rcdata",
                      help="escape rcdata element values")

    parser.add_option("", "--sanitize", action="store_true", default=False,
                      dest="sanitize", help="sanitize")

    parser.add_option("", "--liberal-xml-parser", action="store_true", default=False,
                      dest="liberalxml", help="parse with liberal xml parser")

    return parser

if __name__ == "__main__":
    parse()