Pyparse は、この JS と HTML の混合を橋渡しするのに役立つかもしれません。このパーサーはdocument.write、引用符で囲まれた文字列またはいくつかの引用符で囲まれた文字列と識別子の文字列式を含むステートメントを探し、文字列式を準評価し、埋め込み<frame>タグを解析し、フレーム属性を pyparses ParseResults オブジェクトとして返します。オブジェクト属性または dict キー (好み) であるかのように指定された属性。
jssrc = """
<script language="javascript">
.
.
.
document.write('<frame name="nav" src="/nav/index_nav.html" marginwidth="0" marginheight="0" scrolling="no" frameborder="0" border = "no" noresize>');
if (anchor != "")
{ document.write('<frame name="body" src="http://content.members.fidelity.com/mfl/summary/0,,' + cusip + ',00.html?' + anchor + '" marginwidth="0" marginheight="0" scrolling="auto" frameborder="0" noresize>'); }
else
{ document.write('<frame name="body" src="http://content.members.fidelity.com/mfl/summary/0,,' + cusip + ',00.html" marginwidth="0" marginheight="0" scrolling="auto" frameborder="0" noresize>'); }
document.write('</frameset>');
// end hiding -->
</script>"""
from pyparsing import *
# define some basic punctuation, and quoted string
LPAR,RPAR,PLUS = map(Suppress,"()+")
qs = QuotedString("'")
# use pyparsing helper to define an expression for opening <frame>
# tags, which includes support for attributes also
frameTag = makeHTMLTags("frame")[0]
# some of our document.write statements contain not a sting literal,
# but an expression of strings and vars added together; define
# an identifier expression, and add a parse action that converts
# a var name to a likely value
ident = Word(alphas).setParseAction(lambda toks: evalvars[toks[0]])
evalvars = { 'cusip' : "CUSIP", 'anchor' : "ANCHOR" }
# now define the string expression itself, as a quoted string,
# optionally followed by identifiers and quoted strings added
# together; identifiers will get translated to their defined values
# as they are parsed; the first parse action on stringExpr concatenates
# all the tokens; then the second parse action actually parses the
# body of the string as a <frame> tag and returns the results of parsing
# the tag and its attributes; if the parse fails (that is, if the
# string contains something that is not a <frame> tag), the second
# parse action will throw an exception, which will cause the stringExpr
# expression to fail
stringExpr = qs + ZeroOrMore( PLUS + (ident | qs))
stringExpr.setParseAction(lambda toks : ''.join(toks))
stringExpr.addParseAction(lambda toks:
frameTag.parseString(toks[0],parseAll=True))
# finally, define the overall document.write(...) expression
docWrite = "document.write" + LPAR + stringExpr + RPAR
# scan through the source looking for document.write commands containing
# <frame> tags using scanString; print the original source fragment,
# then access some of the attributes extracted from the <frame> tag
# in the quoted string, using either object-attribute notation or
# dict index notation
for dw,locstart,locend in docWrite.scanString(jssrc):
print jssrc[locstart:locend]
print dw.name
print dw["src"]
print
版画:
document.write('<frame name="nav" src="/nav/index_nav.html" marginwidth="0" marginheight="0" scrolling="no" frameborder="0" border = "no" noresize>')
nav
/nav/index_nav.html
document.write('<frame name="body" src="http://content.members.fidelity.com/mfl/summary/0,,' + cusip + ',00.html?' + anchor + '" marginwidth="0" marginheight="0" scrolling="auto" frameborder="0" noresize>')
body
http://content.members.fidelity.com/mfl/summary/0,,CUSIP,00.html?ANCHOR
document.write('<frame name="body" src="http://content.members.fidelity.com/mfl/summary/0,,' + cusip + ',00.html" marginwidth="0" marginheight="0" scrolling="auto" frameborder="0" noresize>')
body
http://content.members.fidelity.com/mfl/summary/0,,CUSIP,00.html