commit 141f6e321190b7c8f928aba88ad0be8f553ee282 Author: Alexander Færøy ahf@torproject.org Date: Fri May 12 13:37:29 2017 +0200

Add client_meth_pref array to define client compression preference.

See: https://bugs.torproject.org/21667 --- src/or/directory.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/or/directory.c b/src/or/directory.c index 7965ffd..d9d402a 100644 --- a/src/or/directory.c +++ b/src/or/directory.c @@ -3321,6 +3321,16 @@ parse_accept_encoding_header(const char *h) return result; }

+/** Array of compression methods to use (if supported) for requesting + * compressed data, ordered from best to worst. */ +static compress_method_t client_meth_pref[] = { + LZMA_METHOD, + ZSTD_METHOD, + ZLIB_METHOD, + GZIP_METHOD, + NO_METHOD +}; + /** Return a newly allocated string containing a comma separated list of * supported encodings. */ STATIC char * @@ -3329,11 +3339,10 @@ accept_encoding_header(void) smartlist_t *methods = smartlist_new(); char *header = NULL; compress_method_t method; + unsigned i;

- // FIXME(ahf): Should we rename `srv_meth_pref_precompressed` and use this - // instead to define the order in the directory module rather than the order - // defined in the compression module? - for (method = UNKNOWN_METHOD; method > NO_METHOD; --method) { + for (i = 0; i < ARRAY_LENGTH(client_meth_pref); ++i) { + method = client_meth_pref[i]; if (tor_compress_supports_method(method)) smartlist_add(methods, (char *)compression_method_get_name(method)); }