How can I check a word template file. It can be checked using the extension .dot or .dotx.
But if the user changed a .txt to .dot. How could it identified??
How can I check a word template file. It can be checked using the
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How can I check a word template file. It can be checked using the extension .dot or .dotx.
But if the user changed a .txt to .dot. How could it identified??
To check for a dotx file (which is actually a zip file), check the header:
First four bytes are 0x050 0x4b 0x03 0x04. This will demonstrate if a file is a zip file (so not necessarily a dotx), if you wanted to checked further your would need to unzip the entire buffer and parse the resulting XML.
To check for a dot file (pre 2007), check the header:
First eight bytes 0xd0 0xcf 0x11 0xe0 0xa1 0xb1 0x1a 0xe1
So for either of these cases, open the file in binary mode, read the first eight bytes and compare.