XPath 1.0 interpreter for mochiweb's html tree See src/test.erl for examples

Build

make
make test

API

mochiweb_xpath:execute/2
mochiweb_xpath:execute/3
mochiweb_xpath:compile_xpath/1

Usage

Tree = mochiweb_html:parse(<<"some html">>),
Results = mochiweb_xpath:execute("/some/xpath", Tree).

Note

mochiweb_xpath_parser:compile_xpath/1 utilize two undocumented functions in xmerl (xmerl_xpath_parse:parse/1 and xmerl_xpath_scan:tokens/1). These functions could change between OTP versions.. I'm using R12B2

Xpath coverage

Implemented axes

• self
• child
• descendant-or-self
• descendant
• parent (only for elements, not text()/parent:: or attribute::*/parent::)
• following-sibling (same as parent)
• preceding-sibling (same as parent)
• attribute

Implemented functions

• last
• position
• count
• concat
• ends-with
• name
• starts-with
• contains
• substring
• sum
• string-length
• not

Implemented abbreviated syntax

• indexed access (e.g. div[last() - 1])

TODO axes

• ancestor
• ancestor-or-self
• following
• namespace
• preceding

TODO functions

• id
• local-name
• namespace-uri
• string
• substring-before
• substring-after
• normalize-space
• translate
• boolean
• true
• false
• lang
• number
• sum
• floor
• ceiling
• round

TODO:

port match_* from xmerl_xpath for better axes support