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if not modules then modules = { } end modules ['l-url'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local char, gmatch, gsub, format, byte = string.char, string.gmatch, string.gsub, string.format, string.byte
local concat = table.concat
local tonumber, type = tonumber, type
local lpegmatch, lpegP, lpegC, lpegR, lpegS, lpegCs, lpegCc = lpeg.match, lpeg.P, lpeg.C, lpeg.R, lpeg.S, lpeg.Cs, lpeg.Cc
-- from the spec (on the web):
--
-- foo://example.com:8042/over/there?name=ferret#nose
-- \_/ \______________/\_________/ \_________/ \__/
-- | | | | |
-- scheme authority path query fragment
-- | _____________________|__
-- / \ / \
-- urn:example:animal:ferret:nose
url = url or { }
local function tochar(s)
return char(tonumber(s,16))
end
local colon, qmark, hash, slash, percent, endofstring = lpegP(":"), lpegP("?"), lpegP("#"), lpegP("/"), lpegP("%"), lpegP(-1)
local hexdigit = lpegR("09","AF","af")
local plus = lpegP("+")
local nothing = lpegCc("")
local escaped = (plus / " ") + (percent * lpegC(hexdigit * hexdigit) / tochar)
-- we assume schemes with more than 1 character (in order to avoid problems with windows disks)
local scheme = lpegCs((escaped+(1-colon-slash-qmark-hash))^2) * colon + nothing
local authority = slash * slash * lpegCs((escaped+(1- slash-qmark-hash))^0) + nothing
local path = slash * lpegCs((escaped+(1- qmark-hash))^0) + nothing
local query = qmark * lpegCs((escaped+(1- hash))^0) + nothing
local fragment = hash * lpegCs((escaped+(1- endofstring))^0) + nothing
local parser = lpeg.Ct(scheme * authority * path * query * fragment)
lpeg.patterns.urlsplitter = parser
local escapes = { }
for i=0,255 do
escapes[i] = format("%%%02X",i)
end
local escaper = lpeg.Cs((lpegR("09","AZ","az") + lpegS("-./_") + lpegP(1) / escapes)^0)
lpeg.patterns.urlescaper = escaper
-- todo: reconsider Ct as we can as well have five return values (saves a table)
-- so we can have two parsers, one with and one without
function url.split(str)
return (type(str) == "string" and lpegmatch(parser,str)) or str
end
-- todo: cache them
function url.hashed(str)
local s = url.split(str)
local somescheme = s[1] ~= ""
if not somescheme then
return {
scheme = "file",
authority = "",
path = str,
query = "",
fragment = "",
original = str,
noscheme = true,
}
else
return {
scheme = s[1],
authority = s[2],
path = s[3],
query = s[4],
fragment = s[5],
original = str,
noscheme = false,
}
end
end
function url.hasscheme(str)
return url.split(str)[1] ~= ""
end
function url.addscheme(str,scheme)
return (url.hasscheme(str) and str) or ((scheme or "file:///") .. str)
end
function url.construct(hash) -- dodo: we need to escape !
local fullurl = { }
local scheme, authority, path, query, fragment = hash.scheme, hash.authority, hash.path, hash.query, hash.fragment
if scheme and scheme ~= "" then
fullurl[#fullurl+1] = scheme .. "://"
end
if authority and authority ~= "" then
fullurl[#fullurl+1] = authority
end
if path and path ~= "" then
fullurl[#fullurl+1] = "/" .. path
end
if query and query ~= "" then
fullurl[#fullurl+1] = "?".. query
end
if fragment and fragment ~= "" then
fullurl[#fullurl+1] = "#".. fragment
end
return lpegmatch(escaper,concat(fullurl))
end
function url.filename(filename)
local t = url.hashed(filename)
return (t.scheme == "file" and (gsub(t.path,"^/([a-zA-Z])([:|])/)","%1:"))) or filename
end
function url.query(str)
if type(str) == "string" then
local t = { }
for k, v in gmatch(str,"([^&=]*)=([^&=]*)") do
t[k] = v
end
return t
else
return str
end
end
--~ print(url.filename("file:///c:/oeps.txt"))
--~ print(url.filename("c:/oeps.txt"))
--~ print(url.filename("file:///oeps.txt"))
--~ print(url.filename("file:///etc/test.txt"))
--~ print(url.filename("/oeps.txt"))
--~ from the spec on the web (sort of):
--~ local function test(str)
--~ local t = url.hashed(str)
--~ t.constructed = url.construct(t)
--~ print(table.serialize(t))
--~ end
--~ test("sys:///./colo-rgb")
--~ test("/data/site/output/q2p-develop/resources/ecaboperception4_res/topicresources/58313733/figuur-cow.jpg")
--~ test("file:///M:/q2p/develop/output/q2p-develop/resources/ecaboperception4_res/topicresources/58313733")
--~ test("M:/q2p/develop/output/q2p-develop/resources/ecaboperception4_res/topicresources/58313733")
--~ test("file:///q2p/develop/output/q2p-develop/resources/ecaboperception4_res/topicresources/58313733")
--~ test("/q2p/develop/output/q2p-develop/resources/ecaboperception4_res/topicresources/58313733")
--~ test("file:///cow%20with%20spaces")
--~ test("file:///cow%20with%20spaces.pdf")
--~ test("cow%20with%20spaces.pdf")
--~ test("some%20file")
--~ test("/etc/passwords")
--~ test("http://www.myself.com/some%20words.html")
--~ test("file:///c:/oeps.txt")
--~ test("file:///c|/oeps.txt")
--~ test("file:///etc/oeps.txt")
--~ test("file://./etc/oeps.txt")
--~ test("file:////etc/oeps.txt")
--~ test("ftp://ftp.is.co.za/rfc/rfc1808.txt")
--~ test("http://www.ietf.org/rfc/rfc2396.txt")
--~ test("ldap://[2001:db8::7]/c=GB?objectClass?one#what")
--~ test("mailto:John.Doe@example.com")
--~ test("news:comp.infosystems.www.servers.unix")
--~ test("tel:+1-816-555-1212")
--~ test("telnet://192.0.2.16:80/")
--~ test("urn:oasis:names:specification:docbook:dtd:xml:4.1.2")
--~ test("http://www.pragma-ade.com/spaced%20name")
--~ test("zip:///oeps/oeps.zip#bla/bla.tex")
--~ test("zip:///oeps/oeps.zip?bla/bla.tex")
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