For HPACK-encoded headers (particularly with huffman encoding), it's
really necessary to support hex sequences as they appear in RFC7541
examples, so let's support hex digit pairs with -R.
Now it's possible to do this to send GET https://www.example.com/ :
(dev/h2/mkhdr.sh -t p; dev/h2/mkhdr.sh -t s;
dev/h2/mkhdr.sh -t h -i 1 -f es,eh \
-R '8286 8441 0f77 7777 2e65 7861 6d70 6c65 2e63 6f6d ') | nc 0 8080
With -r it's possible to pass raw data that will be interpreted by
printf so it even supports \x sequences. E.g. for a RST_STREAM, let's
just use \x00\x00\x00\x00.
Now we can build a series of data frames by reading from a file and
chunking it into frames of requested length. It's mostly useful for
data frames (e.g. post). One way to announce these upfront is to
capture the output of curl use without content-length:
$ nc -lp4446 > post-h2-nocl.bin
$ curl -v --http2-prior-knowledge http://127.0.0.1:4446/url -H "content-length:" -d @/dev/null
Then just change the 5th byte from the end from 1 to 0 to remove the
end-of-stream bit, it will allow to chain a file, then to send an
empty DATA frame with ES set :
$ (dev/h2/mkhdr.sh -i 1 -t data -d CHANGELOG;
dev/h2/mkhdr.sh -i 1 -t data -l 0 -f es) > h2-data-changelog.bin
Then post that to the server:
$ cat post-h2-nocl.bin h2-data-changelog.bin | nc 0 4446
Willy Tarreau