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| author | Matthew Wild <mwild1@gmail.com> | 2018-03-27 13:44:40 +0100 |
|---|---|---|
| committer | Matthew Wild <mwild1@gmail.com> | 2018-03-27 13:44:40 +0100 |
| commit | 14b0dd8bdf55d5d282221d42352364ec0862c834 (patch) | |
| tree | f2348fb972cd370fd1ae2721973fb28b109dc931 /util/json.lua | |
| parent | 479ea4dd26f5efd207249f417c27f4e4bda91316 (diff) | |
| download | prosody-14b0dd8bdf55d5d282221d42352364ec0862c834.tar.gz prosody-14b0dd8bdf55d5d282221d42352364ec0862c834.zip | |
util.json: Unescape surrogate pairs
Diffstat (limited to 'util/json.lua')
| -rw-r--r-- | util/json.lua | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/util/json.lua b/util/json.lua index c88d4c09..05af709a 100644 --- a/util/json.lua +++ b/util/json.lua @@ -246,7 +246,7 @@ local function _readarray(json, index) end end local _unescape_error; -local function _unescape_surrogate_func(x) -- luacheck: ignore +local function _unescape_surrogate_func(x) local lead, trail = tonumber(x:sub(3, 6), 16), tonumber(x:sub(9, 12), 16); local codepoint = lead * 0x400 + trail - 0x35FDC00; local a = codepoint % 64; @@ -260,8 +260,9 @@ end local function _unescape_func(x) x = x:match("%x%x%x%x", 3); if x then - --if x >= 0xD800 and x <= 0xDFFF then _unescape_error = true; end -- bad surrogate pair - return codepoint_to_utf8(tonumber(x, 16)); + local codepoint = tonumber(x, 16) + if codepoint >= 0xD800 and codepoint <= 0xDFFF then _unescape_error = true; end -- bad surrogate pair + return codepoint_to_utf8(codepoint); end _unescape_error = true; end @@ -273,7 +274,7 @@ function _readstring(json, index) --if s:find("[%z-\31]") then return nil, "control char in string"; end -- FIXME handle control characters _unescape_error = nil; - --s = s:gsub("\\u[dD][89abAB]%x%x\\u[dD][cdefCDEF]%x%x", _unescape_surrogate_func); + s = s:gsub("\\u[dD][89abAB]%x%x\\u[dD][cdefCDEF]%x%x", _unescape_surrogate_func); -- FIXME handle escapes beyond BMP s = s:gsub("\\u.?.?.?.?", _unescape_func); if _unescape_error then return nil, "invalid escape"; end |