elixir-mint / hpax / 21dc3f90571f8295ae5cd5cd1e02fc3c1e2a1454-PR-32

98%

main: 98%

Build Type

Pull #32

github

Committed by ericmj

Commit Message

Add HPAX.protocol_resize/2 for decoding tables

resize/2 sets both the protocol maximum and the table's own maximum
size. That's right for an encoding context, which takes the whole size
the protocol permits and declares it, but a decoding table's maximum
size is chosen by the peer's encoder and declared with a dynamic table
size update instruction (RFC 7541 4.2). Raising the protocol maximum on
a decoding table kept entries the peer's encoder had evicted, so an
indexed reference to one of them decoded to a stale header instead of
failing.

protocol_resize/2 changes only the maximum the peer is permitted to use
and follows it down when it drops below the table's own maximum. When
the new maximum is below the current size of the table, RFC 9113 4.3.1
requires the encoder to start the next block with a dynamic table size
update of at most the new maximum and requires the receiver to treat a
block that doesn't as a COMPRESSION_ERROR, so decode/2 now returns
{:error, :missing_size_update} for such a block.

Pull Request Pull Request #32: Add HPAX.protocol_resize/2 for decoding tables

Coverage Stats

17 of 18 new or added lines in 2 files covered. (94.44%)

3 existing lines in 2 files now uncovered.

183 of 190 relevant lines covered (96.32%)

3960.12 hits per line