-\r
-local coroutine = coroutine;\r
-local tonumber = tonumber;\r
-local string = string;\r
-local setmetatable, getmetatable = setmetatable, getmetatable;\r
-local pairs = pairs;\r
-\r
-local deadroutine = coroutine.create(function() end);\r
-coroutine.resume(deadroutine);\r
-\r
-module("lxp")\r
-\r
-local entity_map = setmetatable({\r
- ["amp"] = "&";\r
- ["gt"] = ">";\r
- ["lt"] = "<";\r
- ["apos"] = "'";\r
- ["quot"] = "\"";\r
-}, {__index = function(_, s)\r
- if s:sub(1,1) == "#" then\r
- if s:sub(2,2) == "x" then\r
- return string.char(tonumber(s:sub(3), 16));\r
- else\r
- return string.char(tonumber(s:sub(2)));\r
- end\r
- end\r
- end\r
-});\r
-local function xml_unescape(str)\r
- return (str:gsub("&(.-);", entity_map));\r
-end\r
-local function parse_tag(s)\r
- local name,sattr=(s):gmatch("([^%s]+)(.*)")();\r
- local attr = {};\r
- for a,b in (sattr):gmatch("([^=%s]+)=['\"]([^'\"]*)['\"]") do attr[a] = xml_unescape(b); end\r
- return name, attr;\r
-end\r
-\r
-local function parser(data, handlers, ns_separator)\r
- local function read_until(str)\r
- local pos = data:find(str, nil, true);\r
- while not pos do\r
- data = data..coroutine.yield();\r
- pos = data:find(str, nil, true);\r
- end\r
- local r = data:sub(1, pos);\r
- data = data:sub(pos+1);\r
- return r;\r
- end\r
- local function read_before(str)\r
- local pos = data:find(str, nil, true);\r
- while not pos do\r
- data = data..coroutine.yield();\r
- pos = data:find(str, nil, true);\r
- end\r
- local r = data:sub(1, pos-1);\r
- data = data:sub(pos);\r
- return r;\r
- end\r
- local function peek()\r
- while #data == 0 do data = coroutine.yield(); end\r
- return data:sub(1,1);\r
- end\r
- \r
- local ns = { xml = "http://www.w3.org/XML/1998/namespace" };\r
- ns.__index = ns;\r
- local function apply_ns(name, dodefault)\r
- local prefix,n = name:match("^([^:]*):(.*)$");\r
- if prefix and ns[prefix] then\r
- return ns[prefix]..ns_separator..n;\r
- end\r
- if dodefault and ns[""] then\r
- return ns[""]..ns_separator..name;\r
- end\r
- return name;\r
- end\r
- local function push(tag, attr)\r
- ns = setmetatable({}, ns);\r
- for k,v in pairs(attr) do\r
- local xmlns = k == "xmlns" and "" or k:match("^xmlns:(.*)$");\r
- if xmlns then\r
- ns[xmlns] = v;\r
- attr[k] = nil;\r
- end\r
- end\r
- local newattr, n = {}, 0;\r
- for k,v in pairs(attr) do\r
- n = n+1;\r
- k = apply_ns(k);\r
- newattr[n] = k;\r
- newattr[k] = v;\r
- end\r
- tag = apply_ns(tag, true);\r
- ns[0] = tag;\r
- ns.__index = ns;\r
- return tag, newattr;\r
- end\r
- local function pop()\r
- local tag = ns[0];\r
- ns = getmetatable(ns);\r
- return tag;\r
- end\r
- \r
- while true do\r
- if peek() == "<" then\r
- local elem = read_until(">"):sub(2,-2);\r
- if elem:sub(1,1) == "!" or elem:sub(1,1) == "?" then -- neglect comments and processing-instructions\r
- elseif elem:sub(1,1) == "/" then -- end tag\r
- elem = elem:sub(2);\r
- local name = pop();\r
- handlers:EndElement(name); -- TODO check for start-end tag name match\r
- elseif elem:sub(-1,-1) == "/" then -- empty tag\r
- elem = elem:sub(1,-2);\r
- local name,attr = parse_tag(elem);\r
- name,attr = push(name,attr);\r
- handlers:StartElement(name,attr);\r
- name = pop();\r
- handlers:EndElement(name);\r
- else -- start tag\r
- local name,attr = parse_tag(elem);\r
- name,attr = push(name,attr);\r
- handlers:StartElement(name,attr);\r
- end\r
- else\r
- local text = read_before("<");\r
- handlers:CharacterData(xml_unescape(text));\r
- end\r
- end\r
-end\r
-\r
-function new(handlers, ns_separator)\r
- local co = coroutine.create(parser);\r
- return {\r
- parse = function(self, data)\r
- if not data then\r
- co = deadroutine;\r
- return true; -- eof\r
- end\r
- local success, result = coroutine.resume(co, data, handlers, ns_separator);\r
- if result then\r
- co = deadroutine;\r
- return nil, result; -- error\r
- end\r
- return true; -- success\r
- end;\r
- };\r
-end\r
-\r
-return _M;\r
+
+local coroutine = coroutine;
+local tonumber = tonumber;
+local string = string;
+local setmetatable, getmetatable = setmetatable, getmetatable;
+local pairs = pairs;
+
+local deadroutine = coroutine.create(function() end);
+coroutine.resume(deadroutine);
+
+module("lxp")
+
+local entity_map = setmetatable({
+ ["amp"] = "&";
+ ["gt"] = ">";
+ ["lt"] = "<";
+ ["apos"] = "'";
+ ["quot"] = "\"";
+}, {__index = function(_, s)
+ if s:sub(1,1) == "#" then
+ if s:sub(2,2) == "x" then
+ return string.char(tonumber(s:sub(3), 16));
+ else
+ return string.char(tonumber(s:sub(2)));
+ end
+ end
+ end
+});
+local function xml_unescape(str)
+ return (str:gsub("&(.-);", entity_map));
+end
+local function parse_tag(s)
+ local name,sattr=(s):gmatch("([^%s]+)(.*)")();
+ local attr = {};
+ for a,b in (sattr):gmatch("([^=%s]+)=['\"]([^'\"]*)['\"]") do attr[a] = xml_unescape(b); end
+ return name, attr;
+end
+
+local function parser(data, handlers, ns_separator)
+ local function read_until(str)
+ local pos = data:find(str, nil, true);
+ while not pos do
+ data = data..coroutine.yield();
+ pos = data:find(str, nil, true);
+ end
+ local r = data:sub(1, pos);
+ data = data:sub(pos+1);
+ return r;
+ end
+ local function read_before(str)
+ local pos = data:find(str, nil, true);
+ while not pos do
+ data = data..coroutine.yield();
+ pos = data:find(str, nil, true);
+ end
+ local r = data:sub(1, pos-1);
+ data = data:sub(pos);
+ return r;
+ end
+ local function peek()
+ while #data == 0 do data = coroutine.yield(); end
+ return data:sub(1,1);
+ end
+
+ local ns = { xml = "http://www.w3.org/XML/1998/namespace" };
+ ns.__index = ns;
+ local function apply_ns(name, dodefault)
+ local prefix,n = name:match("^([^:]*):(.*)$");
+ if prefix and ns[prefix] then
+ return ns[prefix]..ns_separator..n;
+ end
+ if dodefault and ns[""] then
+ return ns[""]..ns_separator..name;
+ end
+ return name;
+ end
+ local function push(tag, attr)
+ ns = setmetatable({}, ns);
+ for k,v in pairs(attr) do
+ local xmlns = k == "xmlns" and "" or k:match("^xmlns:(.*)$");
+ if xmlns then
+ ns[xmlns] = v;
+ attr[k] = nil;
+ end
+ end
+ local newattr, n = {}, 0;
+ for k,v in pairs(attr) do
+ n = n+1;
+ k = apply_ns(k);
+ newattr[n] = k;
+ newattr[k] = v;
+ end
+ tag = apply_ns(tag, true);
+ ns[0] = tag;
+ ns.__index = ns;
+ return tag, newattr;
+ end
+ local function pop()
+ local tag = ns[0];
+ ns = getmetatable(ns);
+ return tag;
+ end
+
+ while true do
+ if peek() == "<" then
+ local elem = read_until(">"):sub(2,-2);
+ if elem:sub(1,1) == "!" or elem:sub(1,1) == "?" then -- neglect comments and processing-instructions
+ elseif elem:sub(1,1) == "/" then -- end tag
+ elem = elem:sub(2);
+ local name = pop();
+ handlers:EndElement(name); -- TODO check for start-end tag name match
+ elseif elem:sub(-1,-1) == "/" then -- empty tag
+ elem = elem:sub(1,-2);
+ local name,attr = parse_tag(elem);
+ name,attr = push(name,attr);
+ handlers:StartElement(name,attr);
+ name = pop();
+ handlers:EndElement(name);
+ else -- start tag
+ local name,attr = parse_tag(elem);
+ name,attr = push(name,attr);
+ handlers:StartElement(name,attr);
+ end
+ else
+ local text = read_before("<");
+ handlers:CharacterData(xml_unescape(text));
+ end
+ end
+end
+
+function new(handlers, ns_separator)
+ local co = coroutine.create(parser);
+ return {
+ parse = function(self, data)
+ if not data then
+ co = deadroutine;
+ return true; -- eof
+ end
+ local success, result = coroutine.resume(co, data, handlers, ns_separator);
+ if result then
+ co = deadroutine;
+ return nil, result; -- error
+ end
+ return true; -- success
+ end;
+ };
+end
+
+return _M;
projects / prosody.git / commitdiff