I found the problem , the problem is simple ma very hard risolve:
when the process file htm html read in SD card with buffer 128byte find and parse/replace this tag file “~name_variable~” , panda when find this stream change with real value.
The problem is when send the header “Content-Length: file size” this operation I do first send the file, but i mesure the size wron because:
parse file and replace ~xxx~ with variable of sensor
send file with small buffer 128byte (small memory)
the problem is the size is change when parse/raplace , in the browser IE and firefox this is not problem but in Chrome is a proble , Chrome refuses the file with the size wrong!!