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select raw zlib compression

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Patrick McManus from Mozilla pointed out that the spec requires a specific kind
of zlib compression, which is raw.  You can select that by using a funny api in
zlib.  Mozilla are correcting their compression to this, pywebsockets already did
it right in the first place, libwebsockets should now work OK with those.

Signed-off-by: Andy Green <andy@warmcat.com>
This commit is contained in:
Andy Green 2011-03-22 09:06:52 +00:00
parent 46c2ea0d6f
commit 26111bc4c6
1 changed files with 7 additions and 4 deletions
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11
lib/extension-deflate-stream.c
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@ -4,7 +4,8 @@
#include <string.h>
#include <assert.h>
#define LWS_ZLIB_WINDOW_BITS 8
#define LWS_ZLIB_MEMLEVEL 8
int lws_extension_callback_deflate_stream(
struct libwebsocket_context *context,
@ -29,13 +30,15 @@ int lws_extension_callback_deflate_stream(
conn->zs_in.zalloc = conn->zs_out.zalloc = Z_NULL;
conn->zs_in.zfree = conn->zs_out.zfree = Z_NULL;
conn->zs_in.opaque = conn->zs_out.opaque = Z_NULL;
n = inflateInit(&conn->zs_in);
n = inflateInit2(&conn->zs_in, -LWS_ZLIB_WINDOW_BITS);
if (n != Z_OK) {
fprintf(stderr, "deflateInit returned %d\n", n);
return 1;
}
n = deflateInit(&conn->zs_out,
DEFLATE_STREAM_COMPRESSION_LEVEL);
n = deflateInit2(&conn->zs_out,
DEFLATE_STREAM_COMPRESSION_LEVEL, Z_DEFLATED,
-LWS_ZLIB_WINDOW_BITS, LWS_ZLIB_MEMLEVEL,
Z_DEFAULT_STRATEGY);
if (n != Z_OK) {
fprintf(stderr, "deflateInit returned %d\n", n);
return 1;