sniff

Description:

public string sniff (Message msg, Bytes buffer, out HashTable<string,string>? @params)

Sniffs buffer to determine its Content-Type.

The result may also be influenced by the Content-Type declared in msg's response headers.

this	a ContentSniffer
msg	the message to sniff
buffer	a buffer containing the start of `msg`'s response body
params	return location for Content-Type parameters (eg, "charset"), or null

the sniffed Content-Type of buffer; this will never be null, but may be `application/octet-stream`.