Hi,
I have a NAS device Western Digital My Book live which is UPnP enabled. Its UPnP service description XML Is at an address like:
When I try to get that file using the http module it gives me the error: invalid chunk size
- The file can be viewed easily on the same computer using a web browser
- The python url library is able to retrieve it as well
When I print what it received before that error message it is the 1st line of the XML file. The function generating the error is this in http.lua:
socket.sourcet["http-chunked"] = function(sock, headers)
return base.setmetatable({
getfd = function() return sock:getfd() end,
dirty = function() return sock:dirty() end
}, {
__call = function()
-- get chunk size, skip extention
local line, err = sock:receive()
if err then return nil, err end
local size = base.tonumber(string.gsub(line, ";.*", ""), 16)
if not size then return nil, "invalid chunk size" end
-- was it the last chunk?
if size > 0 then
-- if not, get chunk and skip terminating CRLF
local chunk, err, part = sock:receive(size)
if chunk then sock:receive() end
return chunk, err
else
-- if it was, read trailers into headers table
headers, err = receiveheaders(sock, headers)
if not headers then return nil, err end
end
end
})
end
If I print line just before the tonumber conversion then the 1st line of the xml is printed out but from the code it seems it was expecting a chunk size number.
For the same device I am able to retrieve another UPnP XML description file without any problem which resides on the address:
This does not give the invalid chunk size error.
Both files are easily viewable from the web browser on the same computer.
The command I use to retrieve the files are:
h = require("socket.http")
hdrs = {
["USER-AGENT"]="uPNP/1.0",
["CONTENT-TYPE"] = [[text/xml; charset="utf-8"]]
}
Is this server also not complying with the standard somehow? What would be the correct way to retrieve the xml file?
Thanks,
Milind
