how to replace callback for the same readable io event

[hezhanbang]

i want to read the first data from one tcp connection in function on_tcp_firstRead, then i want to use another function to read the rest of data in the same tcp connection. what functions should i use?

i have try those functions below, it fail:
ret = uv_read_start((uv_stream_t*)tcp_sock, alloc_buffer, on_tcp_firstRead); //read the frist segment in tcp
...
ret = uv_read_start((uv_stream_t*)tcp_sock, alloc_buffer, on_tcp_common_Read); //read the rest of same tcp

[bnoordhuis]

uv_read_stop() followed by uv_read_start() should work - the next chunk of data goes to the new callback.