help with libcurl

[lux5am]

I tried to use libcurl with cffi.
It's fine in luajit. but with puc it give error
libc: Fatal signal 11 (SIGSEGV), code 2 (SEGV_ACCERR), fault addr 0x7ac9a706e0 in tid 27717 (lua), pid 27717 (lua)

the problem is when doing curl_callback.

Also without this line in luajit also give strange incomplete result. maybe it's important to redefine the built-in typedefs which cffi fail to compile.

typedef int64_t time_t;
typedef unsigned int size_t;

local curl = require("libcurl-ffi")
-- local curl = require("luajit-curl")
local ffi = require"ffi" or require"cffi"

local ch = curl.curl_easy_init()

function curl_callback(callfunc)
  return ffi.cast("curl_callback", function (ptr, size, nmemb, stream)
  	local bytes = size*nmemb
  	local dst = ffi.new("char[?]", size*nmemb)
  	ffi.copy(dst, ptr, size*nmemb)
  	callfunc(ffi.string(dst, size*nmemb))
  	return bytes
  end)
end
if (ch) then
	curl.curl_easy_setopt(ch, curl.CURLOPT_URL, "http://example.com")
	curl.curl_easy_setopt(ch, curl.CURLOPT_FOLLOWLOCATION, 1)

  local raw_body = {}
  local raw_header = {}

	local clb_write = curl_callback(function(s) table.insert(raw_body, s) end)
	local clb_header = curl_callback(function(s) table.insert(raw_header, s) end)

	curl.curl_easy_setopt(ch, curl.CURLOPT_WRITEFUNCTION, clb_write)
	curl.curl_easy_setopt(ch, curl.CURLOPT_HEADERFUNCTION, clb_header)
		
	local success, err = pcall(function()
		return curl.curl_easy_perform(ch)
	end)
	clb_write:free()
	clb_header:free()
	
	print(success, err)
	
	-- local result = curl.curl_easy_perform(ch)
	-- if (result ~= curl.CURLE_OK) then
		-- print("FAILURE:", ffi.string(curl.curl_easy_strerror(result)))
	-- end
	
	if #raw_header>0 then
	  print(table.concat(raw_header))
	end
	print("bodylen:", #raw_body)

	curl.curl_easy_cleanup(ch)
	
	print("final>")
end

test_curl.lua.txt
libcurl-ffi.lua.txt

[lux5am]

I found the problem. it's because the fallback returning ffi long instead of number like luajit. so I need to convert it first ffi.tonumber(size)