Add. Examples to new callback functions. [ci skip]

examples/lcurl/curl_debug.lua

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+--
+-- convert `debug.c` example from libcurl examples
+--
+
+local curl = require "lcurl"
+
+local function printf(...)
+  io.stderr:write(string.format(...))
+end
+
+local function dumb(title, data, n)
+  n = n or 16
+  printf("%s, %10.10d bytes (0x%8.8x)\n", title, #data, #data)
+  for i = 1, #data do
+    if (i - 1) % n == 0 then printf("%4.4x: ", i-1) end
+    printf("%02x ", string.byte(data, i, i))
+    if i % n == 0 then printf("\n") end
+  end
+  if #data % n ~= 0 then printf("\n") end
+end
+
+local function my_trace(type, data)
+  local text
+  if type == curl.INFO_TEXT         then printf("== Info: %s", data) end
+  if type == curl.INFO_HEADER_OUT   then text = "=> Send header"     end
+  if type == curl.INFO_DATA_OUT     then text = "=> Send data"       end
+  if type == curl.INFO_SSL_DATA_OUT then text = "=> Send SSL data"   end
+  if type == curl.INFO_HEADER_IN    then text = "<= Recv header"     end
+  if type == curl.INFO_DATA_IN      then text = "<= Recv data"       end
+  if type == curl.INFO_SSL_DATA_IN  then text = "<= Recv SSL data"   end
+  if text then dumb(text, data) end
+end
+
+local easy = curl.easy{
+  url            = "http://google.com",
+  verbose        = true,
+  debugfunction  = my_trace,
+  followlocation = true,
+  writefunction  = function()end,
+}
+
+easy:perform()

examples/lcurl/fnmatch.lua

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+--
+-- Example of how to download multiple files in single perform
+--
+
+local curl = require "lcurl"
+
+local function printf(...)
+  io.stderr:write(string.format(...))
+end
+
+local function pat2pat(s)
+  return "^" .. string.gsub(s, ".", {
+    ["*"] = '[^%.]*';
+    ["."] = '%.';
+  }) .. "$"
+end
+
+local c = curl.easy{
+  url = "ftp://moteus:123456@127.0.0.1/test.*";
+  wildcardmatch = true;
+}
+
+local data, n = 0, 0
+c:setopt_writefunction(function(chunk) data = #chunk + 1 end)
+
+-- called before each new file
+c:setopt_chunk_bgn_function(function(info, remains)
+  data, n = 0, n + 1
+  printf('\n======================================================\n')
+  printf('new file `%s` #%d, remains - %d\n', info.filename, n, remains or -1)
+end)
+
+-- called after file download complite
+c:setopt_chunk_end_function(function()
+  printf('total size %d\n', data)
+  printf('------------------------------------------------------\n')
+end)
+
+-- custom pattern matching function
+c:setopt_fnmatch_function(function(pattern, name)
+  local p = pat2pat(pattern)
+  local r = not not string.match(name, p)
+  printf("%s %s %s\n", r and '+' or '-', pattern, name)
+  return r
+end)
+
+c:perform()