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Add client_meth_pref array to define client compression preference.

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See: https://bugs.torproject.org/21667
This commit is contained in:
Alexander Færøy 2017-05-12 13:37:29 +02:00
parent 59d17ca2bb
commit 141f6e3211
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1 changed files with 13 additions and 4 deletions
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17
src/or/directory.c
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@ -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));
}