Scan a list of sites to see which support HTTPS, SPDY/3.1 and HTTP/2. Outputs a CSV containing information about which protocols are supported.
To get information about a single site
$ echo "http2.cloudflare.com" | ./h2scan
http2.cloudflare.com,t,t,t,t,t,t,t,t,h2 spdy/3.1 http/1.1
h2scan will read lines from an input file and perform multiple tests concurrently for bulk testing.
-workers sets the number of worker routines performing the
testing. Defaults to 10.
-fields causes h2scan to output a header line in the CSV containing
field names.
-log gives the name of a file to which log information will be
written. If given the file is overwritten.