Change. Returns nothing form reader callback means EOF.

Change. multi:iperform() remove easy handle when it done.

doc/lcurl.ldoc

@@ -303,13 +303,22 @@ function setopt_headerfunction() end
 -- A callback accepting one or two parameters.
 -- The first is the reader context if any, and the second is the maximum amount of data to be read.
 -- You can ignore second argument and pass as mach data as you need. lcurl can split data.
--- Function must return data to continue operation. To stop operation it must return empty string on nil.
+-- Function must return data to continue operation. To stop operation it must return empty string or nil or nothing.
 -- Otherwise the transfer will be aborted with an error.
+-- 
 --
 -- @tparam function reader
 -- @param[opt] context reader context
 -- @return[1] self
 --
+-- @usage
+-- local counter = 10
+-- c:setopt_readfunction(function()
+--   if counter > 0 then
+--     counter = counter - 1
+--     return 'a'
+--   end
+-- end)
 function setopt_readfunction() end
 
 --- Set reader function.

src/lceasy.c

@@ -714,7 +714,7 @@ static size_t lcurl_read_callback(lua_State *L,
   }
 
   if(lua_gettop(L) == top){
-    return CURL_READFUNC_ABORT;
+    return 0;
   }
 
   assert(lua_gettop(L) >= top);

src/lua/cURL/impl/cURL.lua

@@ -93,6 +93,7 @@ local function make_iterator(self, perform)
             ok = e:getinfo_response_code() or ok
             buffers:append(e, "done", ok)
           else buffers:append(e, "error", err) end
+          self:remove_handle(e)
         end
         remain = n
       end

test/test_easy.lua

@@ -514,10 +514,10 @@ function teardown()
 end
 
 function test_abort_01()
-  assert_equal(c, c:setopt_readfunction(function() end))
-
-  local _, e = assert_nil(c:perform())
-  assert_equal(curl.error(curl.ERROR_EASY, curl.E_ABORTED_BY_CALLBACK), e)
+--  assert_equal(c, c:setopt_readfunction(function() end))
+--
+--  local _, e = assert_nil(c:perform())
+--  assert_equal(curl.error(curl.ERROR_EASY, curl.E_ABORTED_BY_CALLBACK), e)
 end
 
 function test_abort_02()
@@ -611,6 +611,7 @@ function test_readbuffer()
 end
 
 function test_pass_01()
+  -- We need this to support file:read() method which returns nil as EOF
   assert_equal(c, c:setopt_readfunction(function() return nil end))
 
   assert_equal(c, c:perform())
@@ -619,6 +620,21 @@ function test_pass_01()
   assert_equal(0, #data)
 end
 
+function test_pass_02()
+  local counter = 10
+  assert_equal(c, c:setopt_readfunction(function()
+    if counter > 0 then
+      counter = counter - 1
+      return 'a'
+    end
+  end))
+
+  assert_equal(c, c:perform())
+  c:close()
+  local data = read_file(fname)
+  assert_equal(('a'):rep(10), data)
+end
+
 end
 
 local _ENV = TEST_CASE'escape'               if ENABLE then