web server to read file from SD card and show its content as HTML

SurferTim:
Does this work for you?

no !!!

The web page is blank, and I got "file open failed" error on the serial monitor:""

Starting SD..ok
Ready
Client request: GET / HTTP/1.1

POST data: 
Sending response
file open failed
done

this is driving me crazy !!! I have tried tens of codes with no lock ...