From 7002dfe5556f503320d9bee480e5fb43bdb6e7a3 Mon Sep 17 00:00:00 2001
From: Khaled Hosny <khaledhosny@eglug.org>
Date: Mon, 10 May 2010 17:23:06 +0300
Subject: Rename to lualibs

Rename luaextra->lualibs when sensible, also use luatexbase instead of
luatextra.
---
 lualibs-url.lua | 134 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 lualibs-url.lua

(limited to 'lualibs-url.lua')

diff --git a/lualibs-url.lua b/lualibs-url.lua
new file mode 100644
index 0000000..e3e6f81
--- /dev/null
+++ b/lualibs-url.lua
@@ -0,0 +1,134 @@
+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 = string.char, string.gmatch, string.gsub
+local tonumber, type = tonumber, type
+local lpegmatch = lpeg.match
+
+-- 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 = lpeg.P(":"), lpeg.P("?"), lpeg.P("#"), lpeg.P("/"), lpeg.P("%"), lpeg.P(-1)
+
+local hexdigit  = lpeg.R("09","AF","af")
+local plus      = lpeg.P("+")
+local escaped   = (plus / " ") + (percent * lpeg.C(hexdigit * hexdigit) / tochar)
+
+-- we assume schemes with more than 1 character (in order to avoid problems with windows disks)
+
+local scheme    =                 lpeg.Cs((escaped+(1-colon-slash-qmark-hash))^2) * colon + lpeg.Cc("")
+local authority = slash * slash * lpeg.Cs((escaped+(1-      slash-qmark-hash))^0)         + lpeg.Cc("")
+local path      = slash *         lpeg.Cs((escaped+(1-            qmark-hash))^0)         + lpeg.Cc("")
+local query     = qmark         * lpeg.Cs((escaped+(1-                  hash))^0)         + lpeg.Cc("")
+local fragment  = hash          * lpeg.Cs((escaped+(1-           endofstring))^0)         + lpeg.Cc("")
+
+local parser = lpeg.Ct(scheme * authority * path * query * fragment)
+
+-- 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] ~= ""
+    return {
+        scheme    = (somescheme and s[1]) or "file",
+        authority = s[2],
+        path      = s[3],
+        query     = s[4],
+        fragment  = s[5],
+        original  = str,
+        noscheme  = not somescheme,
+    }
+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)
+    local fullurl = hash.sheme .. "://".. hash.authority .. hash.path
+    if hash.query then
+        fullurl = fullurl .. "?".. hash.query
+    end
+    if hash.fragment then
+        fullurl = fullurl .. "?".. hash.fragment
+    end
+    return 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):
+--~
+--~ function test(str)
+--~     print(table.serialize(url.hashed(str)))
+--~ end
+--~
+--~ test("%56pass%20words")
+--~ 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("/etc/passwords")
+--~ 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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