This repository has been archived by the owner on Sep 27, 2019. It is now read-only.
forked from phi-gamma/lualibs
-
Notifications
You must be signed in to change notification settings - Fork 3
/
lualibs-url.lua
366 lines (309 loc) · 12.2 KB
/
lualibs-url.lua
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
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, format, byte = string.char, string.format, string.byte
local concat = table.concat
local tonumber, type = tonumber, type
local P, C, R, S, Cs, Cc, Ct, Cf, Cg, V = lpeg.P, lpeg.C, lpeg.R, lpeg.S, lpeg.Cs, lpeg.Cc, lpeg.Ct, lpeg.Cf, lpeg.Cg, lpeg.V
local lpegmatch, lpegpatterns, replacer = lpeg.match, lpeg.patterns, lpeg.replacer
-- from wikipedia:
--
-- foo://username:[email protected]:8042/over/there/index.dtb?type=animal;name=narwhal#nose
-- \_/ \_______________/ \_________/ \__/ \___/ \_/ \______________________/ \__/
-- | | | | | | | |
-- | userinfo hostname port | | query fragment
-- | \________________________________/\_____________|____|/
-- scheme | | | |
-- | authority path | |
-- | | |
-- | path interpretable as filename
-- | ___________|____________ |
-- / \ / \ |
-- urn:example:animal:ferret:nose interpretable as extension
--
-- also nice: http://url.spec.whatwg.org/ (maybe some day ...)
url = url or { }
local url = url
local tochar = function(s) return char(tonumber(s,16)) end
local colon = P(":")
local qmark = P("?")
local hash = P("#")
local slash = P("/")
local percent = P("%")
local endofstring = P(-1)
local hexdigit = R("09","AF","af")
local plus = P("+")
local nothing = Cc("")
local escapedchar = (percent * C(hexdigit * hexdigit)) / tochar
local escaped = (plus / " ") + escapedchar -- so no loc://foo++.tex
local noslash = P("/") / ""
-- we assume schemes with more than 1 character (in order to avoid problems with windows disks)
-- we also assume that when we have a scheme, we also have an authority
--
-- maybe we should already split the query (better for unescaping as = & can be part of a value
local schemestr = Cs((escaped+(1-colon-slash-qmark-hash))^2)
local authoritystr = Cs((escaped+(1- slash-qmark-hash))^0)
local pathstr = Cs((escaped+(1- qmark-hash))^0)
----- querystr = Cs((escaped+(1- hash))^0)
local querystr = Cs(( (1- hash))^0)
local fragmentstr = Cs((escaped+(1- endofstring))^0)
local scheme = schemestr * colon + nothing
local authority = slash * slash * authoritystr + nothing
local path = slash * pathstr + nothing
local query = qmark * querystr + nothing
local fragment = hash * fragmentstr + nothing
local validurl = scheme * authority * path * query * fragment
local parser = Ct(validurl)
lpegpatterns.url = validurl
lpegpatterns.urlsplitter = parser
local escapes = { }
setmetatable(escapes, { __index = function(t,k)
local v = format("%%%02X",byte(k))
t[k] = v
return v
end })
local escaper = Cs((R("09","AZ","az")^1 + P(" ")/"%%20" + S("-./_")^1 + P(1) / escapes)^0) -- space happens most
local unescaper = Cs((escapedchar + 1)^0)
local getcleaner = Cs((P("+++") / "%%2B" + P("+") / "%%20" + P(1))^1)
lpegpatterns.urlunescaped = escapedchar
lpegpatterns.urlescaper = escaper
lpegpatterns.urlunescaper = unescaper
lpegpatterns.urlgetcleaner = getcleaner
function url.unescapeget(str)
return lpegmatch(getcleaner,str)
end
-- 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
local function split(str)
return (type(str) == "string" and lpegmatch(parser,str)) or str
end
local isscheme = schemestr * colon * slash * slash -- this test also assumes authority
local function hasscheme(str)
if str then
local scheme = lpegmatch(isscheme,str) -- at least one character
return scheme ~= "" and scheme or false
else
return false
end
end
--~ print(hasscheme("home:"))
--~ print(hasscheme("home://"))
-- todo: cache them
local rootletter = R("az","AZ")
+ S("_-+")
local separator = P("://")
local qualified = P(".")^0 * P("/")
+ rootletter * P(":")
+ rootletter^1 * separator
+ rootletter^1 * P("/")
local rootbased = P("/")
+ rootletter * P(":")
local barswapper = replacer("|",":")
local backslashswapper = replacer("\\","/")
-- queries:
local equal = P("=")
local amp = P("&")
local key = Cs(((escapedchar+1)-equal )^0)
local value = Cs(((escapedchar+1)-amp -endofstring)^0)
local splitquery = Cf ( Ct("") * P { "sequence",
sequence = V("pair") * (amp * V("pair"))^0,
pair = Cg(key * equal * value),
}, rawset)
-- hasher
local function hashed(str) -- not yet ok (/test?test)
if not str or str == "" then
return {
scheme = "invalid",
original = str,
}
end
local detailed = split(str)
local rawscheme = ""
local rawquery = ""
local somescheme = false
local somequery = false
if detailed then
rawscheme = detailed[1]
rawquery = detailed[4]
somescheme = rawscheme ~= ""
somequery = rawquery ~= ""
end
if not somescheme and not somequery then
return {
scheme = "file",
authority = "",
path = str,
query = "",
fragment = "",
original = str,
noscheme = true,
filename = str,
}
end
-- not always a filename but handy anyway
local authority = detailed[2]
local path = detailed[3]
local filename = nil
if authority == "" then
filename = path
elseif path == "" then
filename = ""
else
filename = authority .. "/" .. path
end
return {
scheme = rawscheme,
authority = authority,
path = path,
query = lpegmatch(unescaper,rawquery), -- unescaped, but possible conflict with & and =
queries = lpegmatch(splitquery,rawquery), -- split first and then unescaped
fragment = detailed[5],
original = str,
noscheme = false,
filename = filename,
}
end
-- inspect(hashed())
-- inspect(hashed(""))
-- inspect(hashed("template:///test"))
-- inspect(hashed("template:///test++.whatever"))
-- inspect(hashed("template:///test%2B%2B.whatever"))
-- inspect(hashed("template:///test%x.whatever"))
-- inspect(hashed("tem%2Bplate:///test%x.whatever"))
-- Here we assume:
--
-- files: /// = relative
-- files: //// = absolute (!)
--~ table.print(hashed("file://c:/opt/tex/texmf-local")) -- c:/opt/tex/texmf-local
--~ table.print(hashed("file://opt/tex/texmf-local" )) -- opt/tex/texmf-local
--~ table.print(hashed("file:///opt/tex/texmf-local" )) -- opt/tex/texmf-local
--~ table.print(hashed("file:////opt/tex/texmf-local" )) -- /opt/tex/texmf-local
--~ table.print(hashed("file:///./opt/tex/texmf-local" )) -- ./opt/tex/texmf-local
--~ table.print(hashed("c:/opt/tex/texmf-local" )) -- c:/opt/tex/texmf-local
--~ table.print(hashed("opt/tex/texmf-local" )) -- opt/tex/texmf-local
--~ table.print(hashed("/opt/tex/texmf-local" )) -- /opt/tex/texmf-local
url.split = split
url.hasscheme = hasscheme
url.hashed = hashed
function url.addscheme(str,scheme) -- no authority
if hasscheme(str) then
return str
elseif not scheme then
return "file:///" .. str
else
return scheme .. ":///" .. str
end
end
function url.construct(hash) -- dodo: we need to escape !
local fullurl, f = { }, 0
local scheme, authority, path, query, fragment = hash.scheme, hash.authority, hash.path, hash.query, hash.fragment
if scheme and scheme ~= "" then
f = f + 1 ; fullurl[f] = scheme .. "://"
end
if authority and authority ~= "" then
f = f + 1 ; fullurl[f] = authority
end
if path and path ~= "" then
f = f + 1 ; fullurl[f] = "/" .. path
end
if query and query ~= "" then
f = f + 1 ; fullurl[f] = "?".. query
end
if fragment and fragment ~= "" then
f = f + 1 ; fullurl[f] = "#".. fragment
end
return lpegmatch(escaper,concat(fullurl))
end
local pattern = Cs(slash^-1/"" * R("az","AZ") * ((S(":|")/":") + P(":")) * slash * P(1)^0)
function url.filename(filename)
local spec = hashed(filename)
local path = spec.path
return (spec.scheme == "file" and path and lpegmatch(pattern,path)) or filename
end
-- print(url.filename("/c|/test"))
-- print(url.filename("/c/test"))
-- print(url.filename("file:///t:/sources/cow.svg"))
local function escapestring(str)
return lpegmatch(escaper,str)
end
url.escape = escapestring
function url.query(str)
if type(str) == "string" then
return lpegmatch(splitquery,str) or ""
else
return str
end
end
function url.toquery(data)
local td = type(data)
if td == "string" then
return #str and escape(data) or nil -- beware of double escaping
elseif td == "table" then
if next(data) then
local t = { }
for k, v in next, data do
t[#t+1] = format("%s=%s",k,escapestring(v))
end
return concat(t,"&")
end
else
-- nil is a signal that no query
end
end
-- /test/ | /test | test/ | test => test
local pattern = Cs(noslash^0 * (1 - noslash * P(-1))^0)
function url.barepath(path)
if not path or path == "" then
return ""
else
return lpegmatch(pattern,path)
end
end
-- print(url.barepath("/test"),url.barepath("test/"),url.barepath("/test/"),url.barepath("test"))
-- print(url.barepath("/x/yz"),url.barepath("x/yz/"),url.barepath("/x/yz/"),url.barepath("x/yz"))
--~ 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
--~ inspect(url.hashed("http://www.pragma-ade.com/test%20test?test=test%20test&x=123%3d45"))
--~ inspect(url.hashed("http://www.pragma-ade.com/test%20test?test=test%20test&x=123%3d45"))
--~ 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:[email protected]")
--~ 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")
--~ table.print(url.hashed("/test?test"))