webmcp
annotate framework/env/encode/json.lua @ 31:1cd9e69b85cb
add execute.load_chunk(args)
load_chunk loads the content of a lua file and returns the code.
It can construct the path name easily so you can put helper code in
seperate files for DRYness.
load_chunk loads the content of a lua file and returns the code.
It can construct the path name easily so you can put helper code in
seperate files for DRYness.
| author | Daniel Poelzleithner <poelzi@poelzi.org> |
|---|---|
| date | Tue Oct 05 02:34:04 2010 +0200 (2010-10-05) |
| parents | e017c47d43b5 |
| children | 32ec28229bb5 |
| rev | line source |
|---|---|
| jbe/bsw@0 | 1 --[[-- |
| jbe/bsw@0 | 2 json_string = -- JavaScript code representing the given datum (with quotes, if needed) |
| jbe/bsw@0 | 3 encode.json( |
| jbe/bsw@0 | 4 obj -- true, false, nil or a number or string |
| jbe/bsw@0 | 5 ) |
| jbe/bsw@0 | 6 |
| jbe@10 | 7 This function encodes any native datatype or atom in JavaScript object notation (JSON). It ensures that the returned string can be safely included in inline scripts both in HTML and XHTML (within CDATA section). |
| jbe@10 | 8 |
| jbe@1 | 9 TODO: can't distinguish unambiguously between empty object and empty list! |
| jbe/bsw@0 | 10 |
| jbe/bsw@0 | 11 --]]-- |
| jbe/bsw@0 | 12 |
| jbe@1 | 13 -- TODO: check if numeric representations are JSON compatible |
| jbe@1 | 14 |
| jbe/bsw@0 | 15 function encode.json(obj) |
| jbe/bsw@0 | 16 if obj == nil then |
| jbe/bsw@0 | 17 return "null"; |
| jbe/bsw@0 | 18 elseif atom.has_type(obj, atom.boolean) then |
| jbe/bsw@0 | 19 return tostring(obj) |
| jbe/bsw@0 | 20 elseif atom.has_type(obj, atom.number) then |
| jbe/bsw@0 | 21 return tostring(obj) |
| jbe@1 | 22 elseif type(obj) == "table" then |
| jbe@1 | 23 local parts = {} |
| jbe@1 | 24 local first = true |
| jbe@1 | 25 if #obj > 0 then |
| jbe@1 | 26 parts[#parts+1] = "[" |
| jbe@1 | 27 for idx, value in ipairs(obj) do |
| jbe@1 | 28 if first then |
| jbe@1 | 29 first = false |
| jbe@1 | 30 else |
| jbe@1 | 31 parts[#parts+1] = "," |
| jbe@1 | 32 end |
| jbe@1 | 33 parts[#parts+1] = tostring(value) |
| jbe@1 | 34 end |
| jbe@1 | 35 parts[#parts+1] = "]" |
| jbe@1 | 36 else |
| jbe@1 | 37 parts[#parts+1] = "{" |
| jbe@1 | 38 for key, value in pairs(obj) do |
| jbe@1 | 39 if first then |
| jbe@1 | 40 first = false |
| jbe@1 | 41 else |
| jbe@1 | 42 parts[#parts+1] = "," |
| jbe@1 | 43 end |
| jbe@1 | 44 parts[#parts+1] = encode.json(key) |
| jbe@1 | 45 parts[#parts+1] = ":" |
| jbe@1 | 46 parts[#parts+1] = encode.json(value) |
| jbe@1 | 47 end |
| jbe@1 | 48 parts[#parts+1] = "}" |
| jbe@1 | 49 end |
| jbe@1 | 50 return table.concat(parts) |
| jbe/bsw@0 | 51 else |
| jbe@10 | 52 local str = atom.dump(obj) |
| jbe@10 | 53 str = string.gsub(str, ".", |
| jbe@10 | 54 function (char) |
| jbe@10 | 55 if char == '\r' then return '\\r' end |
| jbe@10 | 56 if char == '\n' then return '\\n' end |
| jbe@10 | 57 if char == '\\' then return '\\\\' end |
| jbe@10 | 58 if char == '"' then return '\\"' end |
| jbe@10 | 59 local byte = string.byte(char) |
| jbe@10 | 60 if byte < 32 then return string.format("\\u%04x", byte) end |
| jbe@10 | 61 end |
| jbe@10 | 62 ) |
| jbe@10 | 63 str = string.gsub(str, "</", "<\\/") |
| jbe@10 | 64 str = string.gsub(str, "<!%[CDATA%[", "\\u003c![CDATA[") |
| jbe@10 | 65 str = string.gsub(str, "]]>", "]]\\u003e") |
| jbe@10 | 66 return '"' .. str .. '"' |
| jbe/bsw@0 | 67 end |
| jbe/bsw@0 | 68 end |