mirror of
https://github.com/koreader/koreader
synced 2024-10-31 21:20:20 +00:00
94 lines
2.6 KiB
Lua
94 lines
2.6 KiB
Lua
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--[[
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This code is derived from the LAPHLibs which can be found here:
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https://github.com/Wiladams/LAPHLibs
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--]]
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local util = require("ffi/util")
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local luxl = require("luxl")
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local DEBUG = require("dbg")
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local ffi = require("ffi")
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local OPDSParser = {}
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local unescape_map = {
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["lt"] = "<",
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["gt"] = ">",
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["amp"] = "&",
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["quot"] = '"',
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["apos"] = "'"
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}
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local gsub, char = string.gsub, string.char
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local function unescape(str)
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return gsub(str, '(&(#?)([%d%a]+);)', function(orig, n, s)
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return unescape_map[s] or n=="#" and util.unichar(tonumber(s)) or orig
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end)
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end
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function OPDSParser:createFlatXTable(xlex, currentelement)
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currentelement = currentelement or {}
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local currentattributename = nil;
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local attribute_count = 0;
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-- start reading the thing
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local txt = nil;
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for event, offset, size in xlex:Lexemes() do
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txt = ffi.string(xlex.buf + offset, size)
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if event == luxl.EVENT_START and txt ~= "xml" then
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-- does current element already have something
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-- with this name?
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-- if it does, if it's a table, add to it
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-- if it doesn't, then add a table
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local tab = self:createFlatXTable(xlex)
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if txt == "entry" or txt == "link" then
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if currentelement[txt] == nil then
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currentelement[txt] = {}
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end
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table.insert(currentelement[txt], tab)
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elseif type(currentelement) == "table" then
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currentelement[txt] = tab
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end
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end
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if event == luxl.EVENT_ATTR_NAME then
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currentattributename = txt
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end
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if event == luxl.EVENT_ATTR_VAL then
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currentelement[currentattributename] = txt
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attribute_count = attribute_count + 1;
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currentattributename = nil
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end
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if event == luxl.EVENT_TEXT then
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--if attribute_count < 1 then
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-- return txt
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--end
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currentelement = unescape(txt)
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end
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if event == luxl.EVENT_END then
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return currentelement
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end
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end
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return currentelement
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end
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function OPDSParser:parse(text)
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-- luxl cannot properly handle xml comments and we need first remove them
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text = text:gsub("<!--.--->", "")
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-- luxl prefers <br />, other two forms are valid in HTML,
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-- but will kick the ass of luxl
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text = text:gsub("<br>", "<br />")
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text = text:gsub("<br/>", "<br />")
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local xlex = luxl.new(text, #text)
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return self:createFlatXTable(xlex)
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end
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return OPDSParser
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